testing the new dap predictor
jonsowman
rodzic
d25a932b74
commit
ae8ad20ab6
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// CU Spaceflight Landing Prediction
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||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <math.h>
|
||||
|
||||
#include "pred.h"
|
||||
#include "altitude.h"
|
||||
#include "run_model.h"
|
||||
|
||||
// get density of atmosphere at a given altitude
|
||||
// uses NASA model from http://www.grc.nasa.gov/WWW/K-12/airplane/atmosmet.html
|
||||
// units of degrees celcius, metres, KPa and Kg/metre cubed
|
||||
static float get_density(float altitude);
|
||||
|
||||
#define G 9.8
|
||||
|
||||
struct altitude_model_s
|
||||
{
|
||||
float burst_altitude;
|
||||
float ascent_rate;
|
||||
float drag_coeff;
|
||||
int descent_mode;
|
||||
|
||||
float initial_alt;
|
||||
int burst_time;
|
||||
};
|
||||
|
||||
altitude_model_t*
|
||||
altitude_model_new(int dec_mode, float burst_alt, float asc_rate, float drag_co)
|
||||
{
|
||||
altitude_model_t* self = (altitude_model_t*)malloc(sizeof(altitude_model_t));
|
||||
|
||||
// this function doesn't do anything much at the moment
|
||||
// but will prove useful in the future
|
||||
|
||||
self->burst_altitude = burst_alt;
|
||||
self->ascent_rate = asc_rate;
|
||||
self->drag_coeff = drag_co;
|
||||
self->descent_mode = dec_mode;
|
||||
|
||||
return self;
|
||||
}
|
||||
|
||||
void
|
||||
altitude_model_free(altitude_model_t* self)
|
||||
{
|
||||
if(!self)
|
||||
return;
|
||||
|
||||
free(self);
|
||||
}
|
||||
|
||||
int
|
||||
altitude_model_get_altitude(altitude_model_t* self, int time_into_flight, float* alt) {
|
||||
// TODO: this section needs some work to make it more flexible
|
||||
|
||||
// time == 0 so setup initial altitude stuff
|
||||
if (time_into_flight == 0) {
|
||||
self->initial_alt = *alt;
|
||||
self->burst_time = (self->burst_altitude - self->initial_alt) / self->ascent_rate;
|
||||
}
|
||||
|
||||
// If we are not doing a descending mode sim then start going up
|
||||
// at out ascent rate. The ascent rate is constant to a good approximation.
|
||||
if (self->descent_mode == DESCENT_MODE_NORMAL)
|
||||
if (time_into_flight <= self->burst_time) {
|
||||
*alt = self->initial_alt + time_into_flight*self->ascent_rate;
|
||||
return 1;
|
||||
}
|
||||
|
||||
// Descent - just assume its at terminal velocity (which varies with altitude)
|
||||
// this is a pretty darn good approximation for high-ish drag e.g. under parachute
|
||||
// still converges to T.V. quickly (i.e. less than a minute) for low drag.
|
||||
// terminal velocity = -drag_coeff/sqrt(get_density(*alt));
|
||||
*alt += TIMESTEP * -self->drag_coeff/sqrt(get_density(*alt));
|
||||
|
||||
/*
|
||||
// Rob's method - is this just freefall until we reach terminal velocity?
|
||||
vertical_speed = -drag_coeff/sqrt(get_density(*alt));
|
||||
// TODO: inaccurate if still accelerating
|
||||
if (vertical_speed < previous_vertical_speed - G*TIMESTEP) // still accelerating
|
||||
vertical_speed = previous_vertical_speed - G*TIMESTEP;
|
||||
if(vertical_speed > previous_vertical_speed + G*TIMESTEP) // still accelerating
|
||||
vertical_speed = previous_vertical_speed + G*TIMESTEP;
|
||||
previous_vertical_speed = vertical_speed;
|
||||
*alt += TIMESTEP * vertical_speed;
|
||||
*/
|
||||
|
||||
if (*alt <= 0)
|
||||
return 0;
|
||||
|
||||
return 1;
|
||||
|
||||
}
|
||||
|
||||
float get_density(float altitude) {
|
||||
|
||||
float temp = 0.f, pressure = 0.f;
|
||||
|
||||
if (altitude > 25000) {
|
||||
temp = -131.21 + 0.00299 * altitude;
|
||||
pressure = 2.488*pow((temp+273.1)/216.6,-11.388);
|
||||
}
|
||||
if (altitude <=25000 && altitude > 11000) {
|
||||
temp = -56.46;
|
||||
pressure = 22.65 * exp(1.73-0.000157*altitude);
|
||||
}
|
||||
if (altitude <=11000) {
|
||||
temp = 15.04 - 0.00649 * altitude;
|
||||
pressure = 101.29 * pow((temp + 273.1)/288.08,5.256);
|
||||
}
|
||||
|
||||
return pressure/(0.2869*(temp+273.1));
|
||||
}
|
||||
|
|
@ -0,0 +1,49 @@
|
|||
// --------------------------------------------------------------
|
||||
// CU Spaceflight Landing Prediction
|
||||
// Copyright (c) CU Spaceflight 2009, All Right Reserved
|
||||
//
|
||||
// Written by Rob Anderson
|
||||
// Modified by Fergus Noble
|
||||
//
|
||||
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||||
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
||||
// PARTICULAR PURPOSE.
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#ifndef __ALTITUDE_H__
|
||||
#define __ALTITUDE_H__
|
||||
|
||||
typedef struct altitude_model_s altitude_model_t;
|
||||
|
||||
// create an altitude/time model with given parameters, must be called before
|
||||
// calling run_model if descent_mode is DESCENT_MODE_DESCENDING then we start
|
||||
// off with the balloon descending i.e. after burst
|
||||
altitude_model_t *altitude_model_new (int descent_mode,
|
||||
float burst_alt,
|
||||
float ascent_rate,
|
||||
float drag_coeff);
|
||||
|
||||
// free resources associated with the specified altitude model.
|
||||
void altitude_model_free (altitude_model_t *model);
|
||||
|
||||
// returns the altitude corresponding to a certain time into the flight (in seconds)
|
||||
// the result it stored in the alt variable.
|
||||
// the contents of alt when the function is called with time_into_flight = 0
|
||||
// will be taken as the starting altitude returns 1 normally and 0 when the
|
||||
// flight has terminated
|
||||
int altitude_model_get_altitude
|
||||
(altitude_model_t *model,
|
||||
int time_into_flight,
|
||||
float *alt);
|
||||
|
||||
|
||||
|
||||
// it seems like overkill to do it this way but it is in preparation for being able to load in
|
||||
// arbitrary altitude/time profiles from a file
|
||||
|
||||
#define DESCENT_MODE_DESCENDING 1
|
||||
#define DESCENT_MODE_NORMAL 0
|
||||
|
||||
#endif // __ALTITUDE_H__
|
||||
|
||||
|
|
@ -0,0 +1,34 @@
|
|||
# Install script for directory: /var/hab/cusf-landing-prediction/pred_src
|
||||
|
||||
# Set the install prefix
|
||||
IF(NOT DEFINED CMAKE_INSTALL_PREFIX)
|
||||
SET(CMAKE_INSTALL_PREFIX "/usr/local")
|
||||
ENDIF(NOT DEFINED CMAKE_INSTALL_PREFIX)
|
||||
STRING(REGEX REPLACE "/$" "" CMAKE_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}")
|
||||
|
||||
# Set the install configuration name.
|
||||
IF(NOT DEFINED CMAKE_INSTALL_CONFIG_NAME)
|
||||
IF(BUILD_TYPE)
|
||||
STRING(REGEX REPLACE "^[^A-Za-z0-9_]+" ""
|
||||
CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
|
||||
ELSE(BUILD_TYPE)
|
||||
SET(CMAKE_INSTALL_CONFIG_NAME "")
|
||||
ENDIF(BUILD_TYPE)
|
||||
MESSAGE(STATUS "Install configuration: \"${CMAKE_INSTALL_CONFIG_NAME}\"")
|
||||
ENDIF(NOT DEFINED CMAKE_INSTALL_CONFIG_NAME)
|
||||
|
||||
# Set the component getting installed.
|
||||
IF(NOT CMAKE_INSTALL_COMPONENT)
|
||||
IF(COMPONENT)
|
||||
MESSAGE(STATUS "Install component: \"${COMPONENT}\"")
|
||||
SET(CMAKE_INSTALL_COMPONENT "${COMPONENT}")
|
||||
ELSE(COMPONENT)
|
||||
SET(CMAKE_INSTALL_COMPONENT)
|
||||
ENDIF(COMPONENT)
|
||||
ENDIF(NOT CMAKE_INSTALL_COMPONENT)
|
||||
|
||||
# Install shared libraries without execute permission?
|
||||
IF(NOT DEFINED CMAKE_INSTALL_SO_NO_EXE)
|
||||
SET(CMAKE_INSTALL_SO_NO_EXE "1")
|
||||
ENDIF(NOT DEFINED CMAKE_INSTALL_SO_NO_EXE)
|
||||
|
||||
|
|
@ -0,0 +1,21 @@
|
|||
Copyright (c) 2000-2007 by Nicolas Devillard.
|
||||
MIT License
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a
|
||||
copy of this software and associated documentation files (the "Software"),
|
||||
to deal in the Software without restriction, including without limitation
|
||||
the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||||
and/or sell copies of the Software, and to permit persons to whom the
|
||||
Software is furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||||
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||
DEALINGS IN THE SOFTWARE.
|
||||
|
||||
|
|
@ -0,0 +1,4 @@
|
|||
These files from from the iniparser project[1] and are released under the MIT
|
||||
license which may be found in the associated LICENSE file.
|
||||
|
||||
[1] http://ndevilla.free.fr/iniparser/
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
|
||||
Welcome to iniParser -- version 3.0b (beta)
|
||||
released 03 Jan 2008
|
||||
|
||||
This modules offers parsing of ini files from the C level.
|
||||
See a complete documentation in HTML format, from this directory
|
||||
open the file html/index.html with any HTML-capable browser.
|
||||
|
||||
Enjoy!
|
||||
|
||||
N.Devillard
|
||||
Thu Jan 3 19:36:31 CET 2008
|
||||
|
|
@ -0,0 +1,405 @@
|
|||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@file dictionary.c
|
||||
@author N. Devillard
|
||||
@date Sep 2007
|
||||
@version $Revision: 1.27 $
|
||||
@brief Implements a dictionary for string variables.
|
||||
|
||||
This module implements a simple dictionary object, i.e. a list
|
||||
of string/string associations. This object is useful to store e.g.
|
||||
informations retrieved from a configuration file (ini files).
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
$Id: dictionary.c,v 1.27 2007-11-23 21:39:18 ndevilla Exp $
|
||||
$Revision: 1.27 $
|
||||
*/
|
||||
/*---------------------------------------------------------------------------
|
||||
Includes
|
||||
---------------------------------------------------------------------------*/
|
||||
#include "dictionary.h"
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
|
||||
/** Maximum value size for integers and doubles. */
|
||||
#define MAXVALSZ 1024
|
||||
|
||||
/** Minimal allocated number of entries in a dictionary */
|
||||
#define DICTMINSZ 128
|
||||
|
||||
/** Invalid key token */
|
||||
#define DICT_INVALID_KEY ((char*)-1)
|
||||
|
||||
/*---------------------------------------------------------------------------
|
||||
Private functions
|
||||
---------------------------------------------------------------------------*/
|
||||
|
||||
/* Doubles the allocated size associated to a pointer */
|
||||
/* 'size' is the current allocated size. */
|
||||
static void * mem_double(void * ptr, int size)
|
||||
{
|
||||
void * newptr ;
|
||||
|
||||
newptr = calloc(2*size, 1);
|
||||
if (newptr==NULL) {
|
||||
return NULL ;
|
||||
}
|
||||
memcpy(newptr, ptr, size);
|
||||
free(ptr);
|
||||
return newptr ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Duplicate a string
|
||||
@param s String to duplicate
|
||||
@return Pointer to a newly allocated string, to be freed with free()
|
||||
|
||||
This is a replacement for strdup(). This implementation is provided
|
||||
for systems that do not have it.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
static char * xstrdup(char * s)
|
||||
{
|
||||
char * t ;
|
||||
if (!s)
|
||||
return NULL ;
|
||||
t = malloc(strlen(s)+1) ;
|
||||
if (t) {
|
||||
strcpy(t,s);
|
||||
}
|
||||
return t ;
|
||||
}
|
||||
|
||||
/*---------------------------------------------------------------------------
|
||||
Function codes
|
||||
---------------------------------------------------------------------------*/
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Compute the hash key for a string.
|
||||
@param key Character string to use for key.
|
||||
@return 1 unsigned int on at least 32 bits.
|
||||
|
||||
This hash function has been taken from an Article in Dr Dobbs Journal.
|
||||
This is normally a collision-free function, distributing keys evenly.
|
||||
The key is stored anyway in the struct so that collision can be avoided
|
||||
by comparing the key itself in last resort.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
unsigned dictionary_hash(char * key)
|
||||
{
|
||||
int len ;
|
||||
unsigned hash ;
|
||||
int i ;
|
||||
|
||||
len = strlen(key);
|
||||
for (hash=0, i=0 ; i<len ; i++) {
|
||||
hash += (unsigned)key[i] ;
|
||||
hash += (hash<<10);
|
||||
hash ^= (hash>>6) ;
|
||||
}
|
||||
hash += (hash <<3);
|
||||
hash ^= (hash >>11);
|
||||
hash += (hash <<15);
|
||||
return hash ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Create a new dictionary object.
|
||||
@param size Optional initial size of the dictionary.
|
||||
@return 1 newly allocated dictionary objet.
|
||||
|
||||
This function allocates a new dictionary object of given size and returns
|
||||
it. If you do not know in advance (roughly) the number of entries in the
|
||||
dictionary, give size=0.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
dictionary * dictionary_new(int size)
|
||||
{
|
||||
dictionary * d ;
|
||||
|
||||
/* If no size was specified, allocate space for DICTMINSZ */
|
||||
if (size<DICTMINSZ) size=DICTMINSZ ;
|
||||
|
||||
if (!(d = (dictionary *)calloc(1, sizeof(dictionary)))) {
|
||||
return NULL;
|
||||
}
|
||||
d->size = size ;
|
||||
d->val = (char **)calloc(size, sizeof(char*));
|
||||
d->key = (char **)calloc(size, sizeof(char*));
|
||||
d->hash = (unsigned int *)calloc(size, sizeof(unsigned));
|
||||
return d ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Delete a dictionary object
|
||||
@param d dictionary object to deallocate.
|
||||
@return void
|
||||
|
||||
Deallocate a dictionary object and all memory associated to it.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void dictionary_del(dictionary * d)
|
||||
{
|
||||
int i ;
|
||||
|
||||
if (d==NULL) return ;
|
||||
for (i=0 ; i<d->size ; i++) {
|
||||
if (d->key[i]!=NULL)
|
||||
free(d->key[i]);
|
||||
if (d->val[i]!=NULL)
|
||||
free(d->val[i]);
|
||||
}
|
||||
free(d->val);
|
||||
free(d->key);
|
||||
free(d->hash);
|
||||
free(d);
|
||||
return ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get a value from a dictionary.
|
||||
@param d dictionary object to search.
|
||||
@param key Key to look for in the dictionary.
|
||||
@param def Default value to return if key not found.
|
||||
@return 1 pointer to internally allocated character string.
|
||||
|
||||
This function locates a key in a dictionary and returns a pointer to its
|
||||
value, or the passed 'def' pointer if no such key can be found in
|
||||
dictionary. The returned character pointer points to data internal to the
|
||||
dictionary object, you should not try to free it or modify it.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
char * dictionary_get(dictionary * d, char * key, char * def)
|
||||
{
|
||||
unsigned hash ;
|
||||
int i ;
|
||||
|
||||
hash = dictionary_hash(key);
|
||||
for (i=0 ; i<d->size ; i++) {
|
||||
if (d->key[i]==NULL)
|
||||
continue ;
|
||||
/* Compare hash */
|
||||
if (hash==d->hash[i]) {
|
||||
/* Compare string, to avoid hash collisions */
|
||||
if (!strcmp(key, d->key[i])) {
|
||||
return d->val[i] ;
|
||||
}
|
||||
}
|
||||
}
|
||||
return def ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Set a value in a dictionary.
|
||||
@param d dictionary object to modify.
|
||||
@param key Key to modify or add.
|
||||
@param val Value to add.
|
||||
@return int 0 if Ok, anything else otherwise
|
||||
|
||||
If the given key is found in the dictionary, the associated value is
|
||||
replaced by the provided one. If the key cannot be found in the
|
||||
dictionary, it is added to it.
|
||||
|
||||
It is Ok to provide a NULL value for val, but NULL values for the dictionary
|
||||
or the key are considered as errors: the function will return immediately
|
||||
in such a case.
|
||||
|
||||
Notice that if you dictionary_set a variable to NULL, a call to
|
||||
dictionary_get will return a NULL value: the variable will be found, and
|
||||
its value (NULL) is returned. In other words, setting the variable
|
||||
content to NULL is equivalent to deleting the variable from the
|
||||
dictionary. It is not possible (in this implementation) to have a key in
|
||||
the dictionary without value.
|
||||
|
||||
This function returns non-zero in case of failure.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
int dictionary_set(dictionary * d, char * key, char * val)
|
||||
{
|
||||
int i ;
|
||||
unsigned hash ;
|
||||
|
||||
if (d==NULL || key==NULL) return -1 ;
|
||||
|
||||
/* Compute hash for this key */
|
||||
hash = dictionary_hash(key) ;
|
||||
/* Find if value is already in dictionary */
|
||||
if (d->n>0) {
|
||||
for (i=0 ; i<d->size ; i++) {
|
||||
if (d->key[i]==NULL)
|
||||
continue ;
|
||||
if (hash==d->hash[i]) { /* Same hash value */
|
||||
if (!strcmp(key, d->key[i])) { /* Same key */
|
||||
/* Found a value: modify and return */
|
||||
if (d->val[i]!=NULL)
|
||||
free(d->val[i]);
|
||||
d->val[i] = val ? xstrdup(val) : NULL ;
|
||||
/* Value has been modified: return */
|
||||
return 0 ;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
/* Add a new value */
|
||||
/* See if dictionary needs to grow */
|
||||
if (d->n==d->size) {
|
||||
|
||||
/* Reached maximum size: reallocate dictionary */
|
||||
d->val = (char **)mem_double(d->val, d->size * sizeof(char*)) ;
|
||||
d->key = (char **)mem_double(d->key, d->size * sizeof(char*)) ;
|
||||
d->hash = (unsigned int *)mem_double(d->hash, d->size * sizeof(unsigned)) ;
|
||||
if ((d->val==NULL) || (d->key==NULL) || (d->hash==NULL)) {
|
||||
/* Cannot grow dictionary */
|
||||
return -1 ;
|
||||
}
|
||||
/* Double size */
|
||||
d->size *= 2 ;
|
||||
}
|
||||
|
||||
/* Insert key in the first empty slot */
|
||||
for (i=0 ; i<d->size ; i++) {
|
||||
if (d->key[i]==NULL) {
|
||||
/* Add key here */
|
||||
break ;
|
||||
}
|
||||
}
|
||||
/* Copy key */
|
||||
d->key[i] = xstrdup(key);
|
||||
d->val[i] = val ? xstrdup(val) : NULL ;
|
||||
d->hash[i] = hash;
|
||||
d->n ++ ;
|
||||
return 0 ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Delete a key in a dictionary
|
||||
@param d dictionary object to modify.
|
||||
@param key Key to remove.
|
||||
@return void
|
||||
|
||||
This function deletes a key in a dictionary. Nothing is done if the
|
||||
key cannot be found.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void dictionary_unset(dictionary * d, char * key)
|
||||
{
|
||||
unsigned hash ;
|
||||
int i ;
|
||||
|
||||
if (key == NULL) {
|
||||
return;
|
||||
}
|
||||
|
||||
hash = dictionary_hash(key);
|
||||
for (i=0 ; i<d->size ; i++) {
|
||||
if (d->key[i]==NULL)
|
||||
continue ;
|
||||
/* Compare hash */
|
||||
if (hash==d->hash[i]) {
|
||||
/* Compare string, to avoid hash collisions */
|
||||
if (!strcmp(key, d->key[i])) {
|
||||
/* Found key */
|
||||
break ;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (i>=d->size)
|
||||
/* Key not found */
|
||||
return ;
|
||||
|
||||
free(d->key[i]);
|
||||
d->key[i] = NULL ;
|
||||
if (d->val[i]!=NULL) {
|
||||
free(d->val[i]);
|
||||
d->val[i] = NULL ;
|
||||
}
|
||||
d->hash[i] = 0 ;
|
||||
d->n -- ;
|
||||
return ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Dump a dictionary to an opened file pointer.
|
||||
@param d Dictionary to dump
|
||||
@param f Opened file pointer.
|
||||
@return void
|
||||
|
||||
Dumps a dictionary onto an opened file pointer. Key pairs are printed out
|
||||
as @c [Key]=[Value], one per line. It is Ok to provide stdout or stderr as
|
||||
output file pointers.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void dictionary_dump(dictionary * d, FILE * out)
|
||||
{
|
||||
int i ;
|
||||
|
||||
if (d==NULL || out==NULL) return ;
|
||||
if (d->n<1) {
|
||||
fprintf(out, "empty dictionary\n");
|
||||
return ;
|
||||
}
|
||||
for (i=0 ; i<d->size ; i++) {
|
||||
if (d->key[i]) {
|
||||
fprintf(out, "%20s\t[%s]\n",
|
||||
d->key[i],
|
||||
d->val[i] ? d->val[i] : "UNDEF");
|
||||
}
|
||||
}
|
||||
return ;
|
||||
}
|
||||
|
||||
|
||||
/* Test code */
|
||||
#ifdef TESTDIC
|
||||
#define NVALS 20000
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
dictionary * d ;
|
||||
char * val ;
|
||||
int i ;
|
||||
char cval[90] ;
|
||||
|
||||
/* Allocate dictionary */
|
||||
printf("allocating...\n");
|
||||
d = dictionary_new(0);
|
||||
|
||||
/* Set values in dictionary */
|
||||
printf("setting %d values...\n", NVALS);
|
||||
for (i=0 ; i<NVALS ; i++) {
|
||||
sprintf(cval, "%04d", i);
|
||||
dictionary_set(d, cval, "salut");
|
||||
}
|
||||
printf("getting %d values...\n", NVALS);
|
||||
for (i=0 ; i<NVALS ; i++) {
|
||||
sprintf(cval, "%04d", i);
|
||||
val = dictionary_get(d, cval, DICT_INVALID_KEY);
|
||||
if (val==DICT_INVALID_KEY) {
|
||||
printf("cannot get value for key [%s]\n", cval);
|
||||
}
|
||||
}
|
||||
printf("unsetting %d values...\n", NVALS);
|
||||
for (i=0 ; i<NVALS ; i++) {
|
||||
sprintf(cval, "%04d", i);
|
||||
dictionary_unset(d, cval);
|
||||
}
|
||||
if (d->n != 0) {
|
||||
printf("error deleting values\n");
|
||||
}
|
||||
printf("deallocating...\n");
|
||||
dictionary_del(d);
|
||||
return 0 ;
|
||||
}
|
||||
#endif
|
||||
/* vim: set ts=4 et sw=4 tw=75 */
|
||||
|
|
@ -0,0 +1,174 @@
|
|||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@file dictionary.h
|
||||
@author N. Devillard
|
||||
@date Sep 2007
|
||||
@version $Revision: 1.12 $
|
||||
@brief Implements a dictionary for string variables.
|
||||
|
||||
This module implements a simple dictionary object, i.e. a list
|
||||
of string/string associations. This object is useful to store e.g.
|
||||
informations retrieved from a configuration file (ini files).
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
$Id: dictionary.h,v 1.12 2007-11-23 21:37:00 ndevilla Exp $
|
||||
$Author: ndevilla $
|
||||
$Date: 2007-11-23 21:37:00 $
|
||||
$Revision: 1.12 $
|
||||
*/
|
||||
|
||||
#ifndef _DICTIONARY_H_
|
||||
#define _DICTIONARY_H_
|
||||
|
||||
/*---------------------------------------------------------------------------
|
||||
Includes
|
||||
---------------------------------------------------------------------------*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
|
||||
/*---------------------------------------------------------------------------
|
||||
New types
|
||||
---------------------------------------------------------------------------*/
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Dictionary object
|
||||
|
||||
This object contains a list of string/string associations. Each
|
||||
association is identified by a unique string key. Looking up values
|
||||
in the dictionary is speeded up by the use of a (hopefully collision-free)
|
||||
hash function.
|
||||
*/
|
||||
/*-------------------------------------------------------------------------*/
|
||||
typedef struct _dictionary_ {
|
||||
int n ; /** Number of entries in dictionary */
|
||||
int size ; /** Storage size */
|
||||
char ** val ; /** List of string values */
|
||||
char ** key ; /** List of string keys */
|
||||
unsigned * hash ; /** List of hash values for keys */
|
||||
} dictionary ;
|
||||
|
||||
|
||||
/*---------------------------------------------------------------------------
|
||||
Function prototypes
|
||||
---------------------------------------------------------------------------*/
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Compute the hash key for a string.
|
||||
@param key Character string to use for key.
|
||||
@return 1 unsigned int on at least 32 bits.
|
||||
|
||||
This hash function has been taken from an Article in Dr Dobbs Journal.
|
||||
This is normally a collision-free function, distributing keys evenly.
|
||||
The key is stored anyway in the struct so that collision can be avoided
|
||||
by comparing the key itself in last resort.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
unsigned dictionary_hash(char * key);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Create a new dictionary object.
|
||||
@param size Optional initial size of the dictionary.
|
||||
@return 1 newly allocated dictionary objet.
|
||||
|
||||
This function allocates a new dictionary object of given size and returns
|
||||
it. If you do not know in advance (roughly) the number of entries in the
|
||||
dictionary, give size=0.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
dictionary * dictionary_new(int size);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Delete a dictionary object
|
||||
@param d dictionary object to deallocate.
|
||||
@return void
|
||||
|
||||
Deallocate a dictionary object and all memory associated to it.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void dictionary_del(dictionary * vd);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get a value from a dictionary.
|
||||
@param d dictionary object to search.
|
||||
@param key Key to look for in the dictionary.
|
||||
@param def Default value to return if key not found.
|
||||
@return 1 pointer to internally allocated character string.
|
||||
|
||||
This function locates a key in a dictionary and returns a pointer to its
|
||||
value, or the passed 'def' pointer if no such key can be found in
|
||||
dictionary. The returned character pointer points to data internal to the
|
||||
dictionary object, you should not try to free it or modify it.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
char * dictionary_get(dictionary * d, char * key, char * def);
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Set a value in a dictionary.
|
||||
@param d dictionary object to modify.
|
||||
@param key Key to modify or add.
|
||||
@param val Value to add.
|
||||
@return int 0 if Ok, anything else otherwise
|
||||
|
||||
If the given key is found in the dictionary, the associated value is
|
||||
replaced by the provided one. If the key cannot be found in the
|
||||
dictionary, it is added to it.
|
||||
|
||||
It is Ok to provide a NULL value for val, but NULL values for the dictionary
|
||||
or the key are considered as errors: the function will return immediately
|
||||
in such a case.
|
||||
|
||||
Notice that if you dictionary_set a variable to NULL, a call to
|
||||
dictionary_get will return a NULL value: the variable will be found, and
|
||||
its value (NULL) is returned. In other words, setting the variable
|
||||
content to NULL is equivalent to deleting the variable from the
|
||||
dictionary. It is not possible (in this implementation) to have a key in
|
||||
the dictionary without value.
|
||||
|
||||
This function returns non-zero in case of failure.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
int dictionary_set(dictionary * vd, char * key, char * val);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Delete a key in a dictionary
|
||||
@param d dictionary object to modify.
|
||||
@param key Key to remove.
|
||||
@return void
|
||||
|
||||
This function deletes a key in a dictionary. Nothing is done if the
|
||||
key cannot be found.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void dictionary_unset(dictionary * d, char * key);
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Dump a dictionary to an opened file pointer.
|
||||
@param d Dictionary to dump
|
||||
@param f Opened file pointer.
|
||||
@return void
|
||||
|
||||
Dumps a dictionary onto an opened file pointer. Key pairs are printed out
|
||||
as @c [Key]=[Value], one per line. It is Ok to provide stdout or stderr as
|
||||
output file pointers.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void dictionary_dump(dictionary * d, FILE * out);
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,668 @@
|
|||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@file iniparser.c
|
||||
@author N. Devillard
|
||||
@date Sep 2007
|
||||
@version 3.0
|
||||
@brief Parser for ini files.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
/*
|
||||
$Id: iniparser.c,v 2.18 2008-01-03 18:35:39 ndevilla Exp $
|
||||
$Revision: 2.18 $
|
||||
$Date: 2008-01-03 18:35:39 $
|
||||
*/
|
||||
/*---------------------------- Includes ------------------------------------*/
|
||||
#include <ctype.h>
|
||||
#include "iniparser.h"
|
||||
|
||||
/*---------------------------- Defines -------------------------------------*/
|
||||
#define ASCIILINESZ (1024)
|
||||
#define INI_INVALID_KEY ((char*)-1)
|
||||
|
||||
/*---------------------------------------------------------------------------
|
||||
Private to this module
|
||||
---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* This enum stores the status for each parsed line (internal use only).
|
||||
*/
|
||||
typedef enum _line_status_ {
|
||||
LINE_UNPROCESSED,
|
||||
LINE_ERROR,
|
||||
LINE_EMPTY,
|
||||
LINE_COMMENT,
|
||||
LINE_SECTION,
|
||||
LINE_VALUE
|
||||
} line_status ;
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Convert a string to lowercase.
|
||||
@param s String to convert.
|
||||
@return ptr to statically allocated string.
|
||||
|
||||
This function returns a pointer to a statically allocated string
|
||||
containing a lowercased version of the input string. Do not free
|
||||
or modify the returned string! Since the returned string is statically
|
||||
allocated, it will be modified at each function call (not re-entrant).
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
static char * strlwc(const char * s)
|
||||
{
|
||||
static char l[ASCIILINESZ+1];
|
||||
int i ;
|
||||
|
||||
if (s==NULL) return NULL ;
|
||||
memset(l, 0, ASCIILINESZ+1);
|
||||
i=0 ;
|
||||
while (s[i] && i<ASCIILINESZ) {
|
||||
l[i] = (char)tolower((int)s[i]);
|
||||
i++ ;
|
||||
}
|
||||
l[ASCIILINESZ]=(char)0;
|
||||
return l ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Remove blanks at the beginning and the end of a string.
|
||||
@param s String to parse.
|
||||
@return ptr to statically allocated string.
|
||||
|
||||
This function returns a pointer to a statically allocated string,
|
||||
which is identical to the input string, except that all blank
|
||||
characters at the end and the beg. of the string have been removed.
|
||||
Do not free or modify the returned string! Since the returned string
|
||||
is statically allocated, it will be modified at each function call
|
||||
(not re-entrant).
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
static char * strstrip(char * s)
|
||||
{
|
||||
static char l[ASCIILINESZ+1];
|
||||
char * last ;
|
||||
|
||||
if (s==NULL) return NULL ;
|
||||
|
||||
while (isspace((int)*s) && *s) s++;
|
||||
memset(l, 0, ASCIILINESZ+1);
|
||||
strcpy(l, s);
|
||||
last = l + strlen(l);
|
||||
while (last > l) {
|
||||
if (!isspace((int)*(last-1)))
|
||||
break ;
|
||||
last -- ;
|
||||
}
|
||||
*last = (char)0;
|
||||
return (char*)l ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get number of sections in a dictionary
|
||||
@param d Dictionary to examine
|
||||
@return int Number of sections found in dictionary
|
||||
|
||||
This function returns the number of sections found in a dictionary.
|
||||
The test to recognize sections is done on the string stored in the
|
||||
dictionary: a section name is given as "section" whereas a key is
|
||||
stored as "section:key", thus the test looks for entries that do not
|
||||
contain a colon.
|
||||
|
||||
This clearly fails in the case a section name contains a colon, but
|
||||
this should simply be avoided.
|
||||
|
||||
This function returns -1 in case of error.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
int iniparser_getnsec(dictionary * d)
|
||||
{
|
||||
int i ;
|
||||
int nsec ;
|
||||
|
||||
if (d==NULL) return -1 ;
|
||||
nsec=0 ;
|
||||
for (i=0 ; i<d->size ; i++) {
|
||||
if (d->key[i]==NULL)
|
||||
continue ;
|
||||
if (strchr(d->key[i], ':')==NULL) {
|
||||
nsec ++ ;
|
||||
}
|
||||
}
|
||||
return nsec ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get name for section n in a dictionary.
|
||||
@param d Dictionary to examine
|
||||
@param n Section number (from 0 to nsec-1).
|
||||
@return Pointer to char string
|
||||
|
||||
This function locates the n-th section in a dictionary and returns
|
||||
its name as a pointer to a string statically allocated inside the
|
||||
dictionary. Do not free or modify the returned string!
|
||||
|
||||
This function returns NULL in case of error.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
char * iniparser_getsecname(dictionary * d, int n)
|
||||
{
|
||||
int i ;
|
||||
int foundsec ;
|
||||
|
||||
if (d==NULL || n<0) return NULL ;
|
||||
foundsec=0 ;
|
||||
for (i=0 ; i<d->size ; i++) {
|
||||
if (d->key[i]==NULL)
|
||||
continue ;
|
||||
if (strchr(d->key[i], ':')==NULL) {
|
||||
foundsec++ ;
|
||||
if (foundsec>n)
|
||||
break ;
|
||||
}
|
||||
}
|
||||
if (foundsec<=n) {
|
||||
return NULL ;
|
||||
}
|
||||
return d->key[i] ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Dump a dictionary to an opened file pointer.
|
||||
@param d Dictionary to dump.
|
||||
@param f Opened file pointer to dump to.
|
||||
@return void
|
||||
|
||||
This function prints out the contents of a dictionary, one element by
|
||||
line, onto the provided file pointer. It is OK to specify @c stderr
|
||||
or @c stdout as output files. This function is meant for debugging
|
||||
purposes mostly.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void iniparser_dump(dictionary * d, FILE * f)
|
||||
{
|
||||
int i ;
|
||||
|
||||
if (d==NULL || f==NULL) return ;
|
||||
for (i=0 ; i<d->size ; i++) {
|
||||
if (d->key[i]==NULL)
|
||||
continue ;
|
||||
if (d->val[i]!=NULL) {
|
||||
fprintf(f, "[%s]=[%s]\n", d->key[i], d->val[i]);
|
||||
} else {
|
||||
fprintf(f, "[%s]=UNDEF\n", d->key[i]);
|
||||
}
|
||||
}
|
||||
return ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Save a dictionary to a loadable ini file
|
||||
@param d Dictionary to dump
|
||||
@param f Opened file pointer to dump to
|
||||
@return void
|
||||
|
||||
This function dumps a given dictionary into a loadable ini file.
|
||||
It is Ok to specify @c stderr or @c stdout as output files.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void iniparser_dump_ini(dictionary * d, FILE * f)
|
||||
{
|
||||
int i, j ;
|
||||
char keym[ASCIILINESZ+1];
|
||||
int nsec ;
|
||||
char * secname ;
|
||||
int seclen ;
|
||||
|
||||
if (d==NULL || f==NULL) return ;
|
||||
|
||||
nsec = iniparser_getnsec(d);
|
||||
if (nsec<1) {
|
||||
/* No section in file: dump all keys as they are */
|
||||
for (i=0 ; i<d->size ; i++) {
|
||||
if (d->key[i]==NULL)
|
||||
continue ;
|
||||
fprintf(f, "%s = %s\n", d->key[i], d->val[i]);
|
||||
}
|
||||
return ;
|
||||
}
|
||||
for (i=0 ; i<nsec ; i++) {
|
||||
secname = iniparser_getsecname(d, i) ;
|
||||
seclen = (int)strlen(secname);
|
||||
fprintf(f, "\n[%s]\n", secname);
|
||||
sprintf(keym, "%s:", secname);
|
||||
for (j=0 ; j<d->size ; j++) {
|
||||
if (d->key[j]==NULL)
|
||||
continue ;
|
||||
if (!strncmp(d->key[j], keym, seclen+1)) {
|
||||
fprintf(f,
|
||||
"%-30s = %s\n",
|
||||
d->key[j]+seclen+1,
|
||||
d->val[j] ? d->val[j] : "");
|
||||
}
|
||||
}
|
||||
}
|
||||
fprintf(f, "\n");
|
||||
return ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get the string associated to a key
|
||||
@param d Dictionary to search
|
||||
@param key Key string to look for
|
||||
@param def Default value to return if key not found.
|
||||
@return pointer to statically allocated character string
|
||||
|
||||
This function queries a dictionary for a key. A key as read from an
|
||||
ini file is given as "section:key". If the key cannot be found,
|
||||
the pointer passed as 'def' is returned.
|
||||
The returned char pointer is pointing to a string allocated in
|
||||
the dictionary, do not free or modify it.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
char * iniparser_getstring(dictionary * d, const char * key, char * def)
|
||||
{
|
||||
char * lc_key ;
|
||||
char * sval ;
|
||||
|
||||
if (d==NULL || key==NULL)
|
||||
return def ;
|
||||
|
||||
lc_key = strlwc(key);
|
||||
sval = dictionary_get(d, lc_key, def);
|
||||
return sval ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get the string associated to a key, convert to an int
|
||||
@param d Dictionary to search
|
||||
@param key Key string to look for
|
||||
@param notfound Value to return in case of error
|
||||
@return integer
|
||||
|
||||
This function queries a dictionary for a key. A key as read from an
|
||||
ini file is given as "section:key". If the key cannot be found,
|
||||
the notfound value is returned.
|
||||
|
||||
Supported values for integers include the usual C notation
|
||||
so decimal, octal (starting with 0) and hexadecimal (starting with 0x)
|
||||
are supported. Examples:
|
||||
|
||||
"42" -> 42
|
||||
"042" -> 34 (octal -> decimal)
|
||||
"0x42" -> 66 (hexa -> decimal)
|
||||
|
||||
Warning: the conversion may overflow in various ways. Conversion is
|
||||
totally outsourced to strtol(), see the associated man page for overflow
|
||||
handling.
|
||||
|
||||
Credits: Thanks to A. Becker for suggesting strtol()
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
int iniparser_getint(dictionary * d, const char * key, int notfound)
|
||||
{
|
||||
char * str ;
|
||||
|
||||
str = iniparser_getstring(d, key, INI_INVALID_KEY);
|
||||
if (str==INI_INVALID_KEY) return notfound ;
|
||||
return (int)strtol(str, NULL, 0);
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get the string associated to a key, convert to a double
|
||||
@param d Dictionary to search
|
||||
@param key Key string to look for
|
||||
@param notfound Value to return in case of error
|
||||
@return double
|
||||
|
||||
This function queries a dictionary for a key. A key as read from an
|
||||
ini file is given as "section:key". If the key cannot be found,
|
||||
the notfound value is returned.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
double iniparser_getdouble(dictionary * d, char * key, double notfound)
|
||||
{
|
||||
char * str ;
|
||||
|
||||
str = iniparser_getstring(d, key, INI_INVALID_KEY);
|
||||
if (str==INI_INVALID_KEY) return notfound ;
|
||||
return atof(str);
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get the string associated to a key, convert to a boolean
|
||||
@param d Dictionary to search
|
||||
@param key Key string to look for
|
||||
@param notfound Value to return in case of error
|
||||
@return integer
|
||||
|
||||
This function queries a dictionary for a key. A key as read from an
|
||||
ini file is given as "section:key". If the key cannot be found,
|
||||
the notfound value is returned.
|
||||
|
||||
A true boolean is found if one of the following is matched:
|
||||
|
||||
- A string starting with 'y'
|
||||
- A string starting with 'Y'
|
||||
- A string starting with 't'
|
||||
- A string starting with 'T'
|
||||
- A string starting with '1'
|
||||
|
||||
A false boolean is found if one of the following is matched:
|
||||
|
||||
- A string starting with 'n'
|
||||
- A string starting with 'N'
|
||||
- A string starting with 'f'
|
||||
- A string starting with 'F'
|
||||
- A string starting with '0'
|
||||
|
||||
The notfound value returned if no boolean is identified, does not
|
||||
necessarily have to be 0 or 1.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
int iniparser_getboolean(dictionary * d, const char * key, int notfound)
|
||||
{
|
||||
char * c ;
|
||||
int ret ;
|
||||
|
||||
c = iniparser_getstring(d, key, INI_INVALID_KEY);
|
||||
if (c==INI_INVALID_KEY) return notfound ;
|
||||
if (c[0]=='y' || c[0]=='Y' || c[0]=='1' || c[0]=='t' || c[0]=='T') {
|
||||
ret = 1 ;
|
||||
} else if (c[0]=='n' || c[0]=='N' || c[0]=='0' || c[0]=='f' || c[0]=='F') {
|
||||
ret = 0 ;
|
||||
} else {
|
||||
ret = notfound ;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Finds out if a given entry exists in a dictionary
|
||||
@param ini Dictionary to search
|
||||
@param entry Name of the entry to look for
|
||||
@return integer 1 if entry exists, 0 otherwise
|
||||
|
||||
Finds out if a given entry exists in the dictionary. Since sections
|
||||
are stored as keys with NULL associated values, this is the only way
|
||||
of querying for the presence of sections in a dictionary.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
int iniparser_find_entry(
|
||||
dictionary * ini,
|
||||
char * entry
|
||||
)
|
||||
{
|
||||
int found=0 ;
|
||||
if (iniparser_getstring(ini, entry, INI_INVALID_KEY)!=INI_INVALID_KEY) {
|
||||
found = 1 ;
|
||||
}
|
||||
return found ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Set an entry in a dictionary.
|
||||
@param ini Dictionary to modify.
|
||||
@param entry Entry to modify (entry name)
|
||||
@param val New value to associate to the entry.
|
||||
@return int 0 if Ok, -1 otherwise.
|
||||
|
||||
If the given entry can be found in the dictionary, it is modified to
|
||||
contain the provided value. If it cannot be found, -1 is returned.
|
||||
It is Ok to set val to NULL.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
int iniparser_set(dictionary * ini, char * entry, char * val)
|
||||
{
|
||||
return dictionary_set(ini, strlwc(entry), val) ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Delete an entry in a dictionary
|
||||
@param ini Dictionary to modify
|
||||
@param entry Entry to delete (entry name)
|
||||
@return void
|
||||
|
||||
If the given entry can be found, it is deleted from the dictionary.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void iniparser_unset(dictionary * ini, char * entry)
|
||||
{
|
||||
dictionary_unset(ini, strlwc(entry));
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Load a single line from an INI file
|
||||
@param input_line Input line, may be concatenated multi-line input
|
||||
@param section Output space to store section
|
||||
@param key Output space to store key
|
||||
@param value Output space to store value
|
||||
@return line_status value
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
static line_status iniparser_line(
|
||||
char * input_line,
|
||||
char * section,
|
||||
char * key,
|
||||
char * value)
|
||||
{
|
||||
line_status sta ;
|
||||
char line[ASCIILINESZ+1];
|
||||
int len ;
|
||||
|
||||
strcpy(line, strstrip(input_line));
|
||||
len = (int)strlen(line);
|
||||
|
||||
sta = LINE_UNPROCESSED ;
|
||||
if (len<1) {
|
||||
/* Empty line */
|
||||
sta = LINE_EMPTY ;
|
||||
} else if (line[0]=='#') {
|
||||
/* Comment line */
|
||||
sta = LINE_COMMENT ;
|
||||
} else if (line[0]=='[' && line[len-1]==']') {
|
||||
/* Section name */
|
||||
sscanf(line, "[%[^]]", section);
|
||||
strcpy(section, strstrip(section));
|
||||
strcpy(section, strlwc(section));
|
||||
sta = LINE_SECTION ;
|
||||
} else if (sscanf (line, "%[^=] = \"%[^\"]\"", key, value) == 2
|
||||
|| sscanf (line, "%[^=] = '%[^\']'", key, value) == 2
|
||||
|| sscanf (line, "%[^=] = %[^;#]", key, value) == 2) {
|
||||
/* Usual key=value, with or without comments */
|
||||
strcpy(key, strstrip(key));
|
||||
strcpy(key, strlwc(key));
|
||||
strcpy(value, strstrip(value));
|
||||
/*
|
||||
* sscanf cannot handle '' or "" as empty values
|
||||
* this is done here
|
||||
*/
|
||||
if (!strcmp(value, "\"\"") || (!strcmp(value, "''"))) {
|
||||
value[0]=0 ;
|
||||
}
|
||||
sta = LINE_VALUE ;
|
||||
} else if (sscanf(line, "%[^=] = %[;#]", key, value)==2
|
||||
|| sscanf(line, "%[^=] %[=]", key, value) == 2) {
|
||||
/*
|
||||
* Special cases:
|
||||
* key=
|
||||
* key=;
|
||||
* key=#
|
||||
*/
|
||||
strcpy(key, strstrip(key));
|
||||
strcpy(key, strlwc(key));
|
||||
value[0]=0 ;
|
||||
sta = LINE_VALUE ;
|
||||
} else {
|
||||
/* Generate syntax error */
|
||||
sta = LINE_ERROR ;
|
||||
}
|
||||
return sta ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Parse an ini file and return an allocated dictionary object
|
||||
@param in FILE* to read INI from
|
||||
@return Pointer to newly allocated dictionary
|
||||
|
||||
This is the parser for ini files. This function is called, providing
|
||||
the name of the file to be read. It returns a dictionary object that
|
||||
should not be accessed directly, but through accessor functions
|
||||
instead.
|
||||
|
||||
The returned dictionary must be freed using iniparser_freedict().
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
dictionary * iniparser_loadfile(FILE * in)
|
||||
{
|
||||
char line [ASCIILINESZ+1] ;
|
||||
char section [ASCIILINESZ+1] ;
|
||||
char key [ASCIILINESZ+1] ;
|
||||
char tmp [ASCIILINESZ+1] ;
|
||||
char val [ASCIILINESZ+1] ;
|
||||
|
||||
int last=0 ;
|
||||
int len ;
|
||||
int lineno=0 ;
|
||||
int errs=0;
|
||||
|
||||
dictionary * dict ;
|
||||
|
||||
if(in == NULL) {
|
||||
return NULL ;
|
||||
}
|
||||
|
||||
dict = dictionary_new(0) ;
|
||||
if (!dict) {
|
||||
return NULL ;
|
||||
}
|
||||
|
||||
memset(line, 0, ASCIILINESZ);
|
||||
memset(section, 0, ASCIILINESZ);
|
||||
memset(key, 0, ASCIILINESZ);
|
||||
memset(val, 0, ASCIILINESZ);
|
||||
last=0 ;
|
||||
|
||||
while (fgets(line+last, ASCIILINESZ-last, in)!=NULL) {
|
||||
lineno++ ;
|
||||
len = (int)strlen(line)-1;
|
||||
/* Safety check against buffer overflows */
|
||||
if (line[len]!='\n') {
|
||||
fprintf(stderr,
|
||||
"iniparser: input line too long in file (%d)\n",
|
||||
lineno);
|
||||
dictionary_del(dict);
|
||||
return NULL ;
|
||||
}
|
||||
/* Get rid of \n and spaces at end of line */
|
||||
while ((len>=0) &&
|
||||
((line[len]=='\n') || (isspace(line[len])))) {
|
||||
line[len]=0 ;
|
||||
len-- ;
|
||||
}
|
||||
/* Detect multi-line */
|
||||
if (line[len]=='\\') {
|
||||
/* Multi-line value */
|
||||
last=len ;
|
||||
continue ;
|
||||
} else {
|
||||
last=0 ;
|
||||
}
|
||||
switch (iniparser_line(line, section, key, val)) {
|
||||
case LINE_EMPTY:
|
||||
case LINE_COMMENT:
|
||||
break ;
|
||||
|
||||
case LINE_SECTION:
|
||||
errs = dictionary_set(dict, section, NULL);
|
||||
break ;
|
||||
|
||||
case LINE_VALUE:
|
||||
sprintf(tmp, "%s:%s", section, key);
|
||||
errs = dictionary_set(dict, tmp, val) ;
|
||||
break ;
|
||||
|
||||
case LINE_ERROR:
|
||||
fprintf(stderr, "iniparser: syntax error in file (%d):\n",
|
||||
lineno);
|
||||
fprintf(stderr, "-> %s\n", line);
|
||||
errs++ ;
|
||||
break;
|
||||
|
||||
default:
|
||||
break ;
|
||||
}
|
||||
memset(line, 0, ASCIILINESZ);
|
||||
last=0;
|
||||
if (errs<0) {
|
||||
fprintf(stderr, "iniparser: memory allocation failure\n");
|
||||
break ;
|
||||
}
|
||||
}
|
||||
if (errs) {
|
||||
dictionary_del(dict);
|
||||
dict = NULL ;
|
||||
}
|
||||
return dict ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Parse an ini file and return an allocated dictionary object
|
||||
@param ininame Name of the ini file to read.
|
||||
@return Pointer to newly allocated dictionary
|
||||
|
||||
This is the parser for ini files. This function is called, providing
|
||||
the name of the file to be read. It returns a dictionary object that
|
||||
should not be accessed directly, but through accessor functions
|
||||
instead.
|
||||
|
||||
The returned dictionary must be freed using iniparser_freedict().
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
dictionary * iniparser_load(const char * ininame)
|
||||
{
|
||||
FILE * in;
|
||||
dictionary * dict;
|
||||
|
||||
if ((in=fopen(ininame, "r"))==NULL) {
|
||||
fprintf(stderr, "iniparser: cannot open %s\n", ininame);
|
||||
return NULL ;
|
||||
}
|
||||
|
||||
dict = iniparser_loadfile(in);
|
||||
fclose(in);
|
||||
|
||||
return dict ;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Free all memory associated to an ini dictionary
|
||||
@param d Dictionary to free
|
||||
@return void
|
||||
|
||||
Free all memory associated to an ini dictionary.
|
||||
It is mandatory to call this function before the dictionary object
|
||||
gets out of the current context.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void iniparser_freedict(dictionary * d)
|
||||
{
|
||||
dictionary_del(d);
|
||||
}
|
||||
|
||||
/* vim: set ts=4 et sw=4 tw=75 */
|
||||
|
|
@ -0,0 +1,296 @@
|
|||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@file iniparser.h
|
||||
@author N. Devillard
|
||||
@date Sep 2007
|
||||
@version 3.0
|
||||
@brief Parser for ini files.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
$Id: iniparser.h,v 1.24 2007-11-23 21:38:19 ndevilla Exp $
|
||||
$Revision: 1.24 $
|
||||
*/
|
||||
|
||||
#ifndef _INIPARSER_H_
|
||||
#define _INIPARSER_H_
|
||||
|
||||
/*---------------------------------------------------------------------------
|
||||
Includes
|
||||
---------------------------------------------------------------------------*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
/*
|
||||
* The following #include is necessary on many Unixes but not Linux.
|
||||
* It is not needed for Windows platforms.
|
||||
* Uncomment it if needed.
|
||||
*/
|
||||
/* #include <unistd.h> */
|
||||
|
||||
#include "dictionary.h"
|
||||
|
||||
/*---------------------------------------------------------------------------
|
||||
Macros
|
||||
---------------------------------------------------------------------------*/
|
||||
/** For backwards compatibility only */
|
||||
#define iniparser_getstr(d, k) iniparser_getstring(d, k, NULL)
|
||||
#define iniparser_setstr iniparser_setstring
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get number of sections in a dictionary
|
||||
@param d Dictionary to examine
|
||||
@return int Number of sections found in dictionary
|
||||
|
||||
This function returns the number of sections found in a dictionary.
|
||||
The test to recognize sections is done on the string stored in the
|
||||
dictionary: a section name is given as "section" whereas a key is
|
||||
stored as "section:key", thus the test looks for entries that do not
|
||||
contain a colon.
|
||||
|
||||
This clearly fails in the case a section name contains a colon, but
|
||||
this should simply be avoided.
|
||||
|
||||
This function returns -1 in case of error.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
int iniparser_getnsec(dictionary * d);
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get name for section n in a dictionary.
|
||||
@param d Dictionary to examine
|
||||
@param n Section number (from 0 to nsec-1).
|
||||
@return Pointer to char string
|
||||
|
||||
This function locates the n-th section in a dictionary and returns
|
||||
its name as a pointer to a string statically allocated inside the
|
||||
dictionary. Do not free or modify the returned string!
|
||||
|
||||
This function returns NULL in case of error.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
char * iniparser_getsecname(dictionary * d, int n);
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Save a dictionary to a loadable ini file
|
||||
@param d Dictionary to dump
|
||||
@param f Opened file pointer to dump to
|
||||
@return void
|
||||
|
||||
This function dumps a given dictionary into a loadable ini file.
|
||||
It is Ok to specify @c stderr or @c stdout as output files.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
|
||||
void iniparser_dump_ini(dictionary * d, FILE * f);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Dump a dictionary to an opened file pointer.
|
||||
@param d Dictionary to dump.
|
||||
@param f Opened file pointer to dump to.
|
||||
@return void
|
||||
|
||||
This function prints out the contents of a dictionary, one element by
|
||||
line, onto the provided file pointer. It is OK to specify @c stderr
|
||||
or @c stdout as output files. This function is meant for debugging
|
||||
purposes mostly.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void iniparser_dump(dictionary * d, FILE * f);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get the string associated to a key
|
||||
@param d Dictionary to search
|
||||
@param key Key string to look for
|
||||
@param def Default value to return if key not found.
|
||||
@return pointer to statically allocated character string
|
||||
|
||||
This function queries a dictionary for a key. A key as read from an
|
||||
ini file is given as "section:key". If the key cannot be found,
|
||||
the pointer passed as 'def' is returned.
|
||||
The returned char pointer is pointing to a string allocated in
|
||||
the dictionary, do not free or modify it.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
char * iniparser_getstring(dictionary * d, const char * key, char * def);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get the string associated to a key, convert to an int
|
||||
@param d Dictionary to search
|
||||
@param key Key string to look for
|
||||
@param notfound Value to return in case of error
|
||||
@return integer
|
||||
|
||||
This function queries a dictionary for a key. A key as read from an
|
||||
ini file is given as "section:key". If the key cannot be found,
|
||||
the notfound value is returned.
|
||||
|
||||
Supported values for integers include the usual C notation
|
||||
so decimal, octal (starting with 0) and hexadecimal (starting with 0x)
|
||||
are supported. Examples:
|
||||
|
||||
- "42" -> 42
|
||||
- "042" -> 34 (octal -> decimal)
|
||||
- "0x42" -> 66 (hexa -> decimal)
|
||||
|
||||
Warning: the conversion may overflow in various ways. Conversion is
|
||||
totally outsourced to strtol(), see the associated man page for overflow
|
||||
handling.
|
||||
|
||||
Credits: Thanks to A. Becker for suggesting strtol()
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
int iniparser_getint(dictionary * d, const char * key, int notfound);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get the string associated to a key, convert to a double
|
||||
@param d Dictionary to search
|
||||
@param key Key string to look for
|
||||
@param notfound Value to return in case of error
|
||||
@return double
|
||||
|
||||
This function queries a dictionary for a key. A key as read from an
|
||||
ini file is given as "section:key". If the key cannot be found,
|
||||
the notfound value is returned.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
double iniparser_getdouble(dictionary * d, char * key, double notfound);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Get the string associated to a key, convert to a boolean
|
||||
@param d Dictionary to search
|
||||
@param key Key string to look for
|
||||
@param notfound Value to return in case of error
|
||||
@return integer
|
||||
|
||||
This function queries a dictionary for a key. A key as read from an
|
||||
ini file is given as "section:key". If the key cannot be found,
|
||||
the notfound value is returned.
|
||||
|
||||
A true boolean is found if one of the following is matched:
|
||||
|
||||
- A string starting with 'y'
|
||||
- A string starting with 'Y'
|
||||
- A string starting with 't'
|
||||
- A string starting with 'T'
|
||||
- A string starting with '1'
|
||||
|
||||
A false boolean is found if one of the following is matched:
|
||||
|
||||
- A string starting with 'n'
|
||||
- A string starting with 'N'
|
||||
- A string starting with 'f'
|
||||
- A string starting with 'F'
|
||||
- A string starting with '0'
|
||||
|
||||
The notfound value returned if no boolean is identified, does not
|
||||
necessarily have to be 0 or 1.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
int iniparser_getboolean(dictionary * d, const char * key, int notfound);
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Set an entry in a dictionary.
|
||||
@param ini Dictionary to modify.
|
||||
@param entry Entry to modify (entry name)
|
||||
@param val New value to associate to the entry.
|
||||
@return int 0 if Ok, -1 otherwise.
|
||||
|
||||
If the given entry can be found in the dictionary, it is modified to
|
||||
contain the provided value. If it cannot be found, -1 is returned.
|
||||
It is Ok to set val to NULL.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
int iniparser_setstring(dictionary * ini, char * entry, char * val);
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Delete an entry in a dictionary
|
||||
@param ini Dictionary to modify
|
||||
@param entry Entry to delete (entry name)
|
||||
@return void
|
||||
|
||||
If the given entry can be found, it is deleted from the dictionary.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void iniparser_unset(dictionary * ini, char * entry);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Finds out if a given entry exists in a dictionary
|
||||
@param ini Dictionary to search
|
||||
@param entry Name of the entry to look for
|
||||
@return integer 1 if entry exists, 0 otherwise
|
||||
|
||||
Finds out if a given entry exists in the dictionary. Since sections
|
||||
are stored as keys with NULL associated values, this is the only way
|
||||
of querying for the presence of sections in a dictionary.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
int iniparser_find_entry(dictionary * ini, char * entry) ;
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Parse an ini file and return an allocated dictionary object
|
||||
@param ininame Name of the ini file to read.
|
||||
@return Pointer to newly allocated dictionary
|
||||
|
||||
This is the parser for ini files. This function is called, providing
|
||||
the name of the file to be read. It returns a dictionary object that
|
||||
should not be accessed directly, but through accessor functions
|
||||
instead.
|
||||
|
||||
The returned dictionary must be freed using iniparser_freedict().
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
dictionary * iniparser_load(const char * ininame);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Parse an ini file and return an allocated dictionary object
|
||||
@param file FILE* associated with file to read
|
||||
@return Pointer to newly allocated dictionary
|
||||
|
||||
This is the parser for ini files. This function is called, providing
|
||||
the name of the file to be read. It returns a dictionary object that
|
||||
should not be accessed directly, but through accessor functions
|
||||
instead.
|
||||
|
||||
The returned dictionary must be freed using iniparser_freedict().
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
dictionary * iniparser_loadfile(FILE * file);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/**
|
||||
@brief Free all memory associated to an ini dictionary
|
||||
@param d Dictionary to free
|
||||
@return void
|
||||
|
||||
Free all memory associated to an ini dictionary.
|
||||
It is mandatory to call this function before the dictionary object
|
||||
gets out of the current context.
|
||||
*/
|
||||
/*--------------------------------------------------------------------------*/
|
||||
void iniparser_freedict(dictionary * d);
|
||||
|
||||
#endif
|
||||
Plik binarny nie jest wyświetlany.
|
|
@ -0,0 +1,363 @@
|
|||
// --------------------------------------------------------------
|
||||
// CU Spaceflight Landing Prediction
|
||||
// Copyright (c) CU Spaceflight 2009, All Right Reserved
|
||||
//
|
||||
// Written by Rob Anderson
|
||||
// Modified by Fergus Noble
|
||||
//
|
||||
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||||
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
||||
// PARTICULAR PURPOSE.
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <time.h>
|
||||
#include <errno.h>
|
||||
|
||||
#include "ini/iniparser.h"
|
||||
#include "util/gopt.h"
|
||||
#include "wind/wind_file_cache.h"
|
||||
|
||||
#include "run_model.h"
|
||||
#include "pred.h"
|
||||
#include "altitude.h"
|
||||
|
||||
FILE* output;
|
||||
FILE* kml_file;
|
||||
const char* data_dir;
|
||||
int verbosity;
|
||||
|
||||
int main(int argc, const char *argv[]) {
|
||||
|
||||
const char* argument;
|
||||
|
||||
long int initial_timestamp;
|
||||
float initial_lat, initial_lng, initial_alt;
|
||||
float burst_alt, ascent_rate, drag_coeff, rmswinderror;
|
||||
int descent_mode;
|
||||
int scenario_idx, n_scenarios;
|
||||
char* endptr; // used to check for errors on strtod calls
|
||||
|
||||
wind_file_cache_t* file_cache;
|
||||
dictionary* scenario = NULL;
|
||||
|
||||
// configure command-line options parsing
|
||||
void *options = gopt_sort(&argc, argv, gopt_start(
|
||||
gopt_option('h', 0, gopt_shorts('h', '?'), gopt_longs("help")),
|
||||
gopt_option('z', 0, gopt_shorts(0), gopt_longs("version")),
|
||||
gopt_option('v', GOPT_REPEAT, gopt_shorts('v'), gopt_longs("verbose")),
|
||||
gopt_option('o', GOPT_ARG, gopt_shorts('o'), gopt_longs("output")),
|
||||
gopt_option('k', GOPT_ARG, gopt_shorts('k'), gopt_longs("kml")),
|
||||
gopt_option('t', GOPT_ARG, gopt_shorts('t'), gopt_longs("start_time")),
|
||||
gopt_option('i', GOPT_ARG, gopt_shorts('i'), gopt_longs("data_dir")),
|
||||
gopt_option('d', 0, gopt_shorts('d'), gopt_longs("descending")),
|
||||
gopt_option('e', GOPT_ARG, gopt_shorts('e'), gopt_longs("wind_error"))
|
||||
));
|
||||
|
||||
if (gopt(options, 'h')) {
|
||||
// Help!
|
||||
// Print usage information
|
||||
printf("Usage: %s [options] [scenario files]\n", argv[0]);
|
||||
printf("Options:\n\n");
|
||||
printf(" -h --help Display this information.\n");
|
||||
printf(" --version Display version information.\n");
|
||||
printf(" -v --verbose Display more information while running,\n");
|
||||
printf(" Use -vv, -vvv etc. for even more verbose output.\n");
|
||||
printf(" -t --start_time <int> Start time of model, defaults to current time.\n");
|
||||
printf(" Should be a UNIX standard format timestamp.\n");
|
||||
printf(" -o --output <file> Output file for CSV data, defaults to stdout. Overrides scenario.\n");
|
||||
printf(" -k --kml <file> Output KML file.\n");
|
||||
printf(" -d --descending We are in the descent phase of the flight, i.e. after\n");
|
||||
printf(" burst or cutdown. burst_alt and ascent_rate ignored.\n");
|
||||
printf(" -i --data_dir <dir> Input directory for wind data, defaults to current dir.\n\n");
|
||||
printf(" -e --wind_error <err> RMS windspeed error (m/s).\n");
|
||||
printf("The scenario file is an INI-like file giving the launch scenario. If it is\n");
|
||||
printf("omitted, the scenario is read from standard input.\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
if (gopt(options, 'z')) {
|
||||
// Version information
|
||||
printf("Landing Prediction version: %s\nCopyright (c) CU Spaceflight 2009\n", VERSION);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
verbosity = gopt(options, 'v');
|
||||
|
||||
if (gopt(options, 'd'))
|
||||
descent_mode = DESCENT_MODE_DESCENDING;
|
||||
else
|
||||
descent_mode = DESCENT_MODE_NORMAL;
|
||||
|
||||
if (gopt_arg(options, 'k', &argument) && strcmp(argument, "-")) {
|
||||
kml_file = fopen(argument, "wb");
|
||||
if (!kml_file) {
|
||||
fprintf(stderr, "ERROR: %s: could not open KML file for output\n", argument);
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
else
|
||||
kml_file = NULL;
|
||||
|
||||
if (gopt_arg(options, 't', &argument) && strcmp(argument, "-")) {
|
||||
initial_timestamp = strtol(argument, &endptr, 0);
|
||||
if (endptr == argument) {
|
||||
fprintf(stderr, "ERROR: %s: invalid start timestamp\n", argument);
|
||||
exit(1);
|
||||
}
|
||||
} else {
|
||||
initial_timestamp = time(NULL);
|
||||
}
|
||||
|
||||
if (!(gopt_arg(options, 'i', &data_dir) && strcmp(data_dir, "-")))
|
||||
data_dir = "./";
|
||||
|
||||
|
||||
// populate wind data file cache
|
||||
file_cache = wind_file_cache_new(data_dir);
|
||||
|
||||
// read in flight parameters
|
||||
n_scenarios = argc - 1;
|
||||
if(n_scenarios == 0) {
|
||||
// we'll parse from std in
|
||||
n_scenarios = 1;
|
||||
}
|
||||
|
||||
for(scenario_idx = 0; scenario_idx < n_scenarios; ++scenario_idx) {
|
||||
char* scenario_output = NULL;
|
||||
|
||||
if(argc > scenario_idx+1) {
|
||||
scenario = iniparser_load(argv[scenario_idx+1]);
|
||||
} else {
|
||||
scenario = iniparser_loadfile(stdin);
|
||||
}
|
||||
|
||||
if(!scenario) {
|
||||
fprintf(stderr, "ERROR: could not parse scanario file.\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if(verbosity > 1) {
|
||||
fprintf(stderr, "INFO: Parsed scenario file:\n");
|
||||
iniparser_dump_ini(scenario, stderr);
|
||||
}
|
||||
|
||||
scenario_output = iniparser_getstring(scenario, "output:filename", NULL);
|
||||
|
||||
if (gopt_arg(options, 'o', &argument) && strcmp(argument, "-")) {
|
||||
if(verbosity > 0) {
|
||||
fprintf(stderr, "INFO: Writing output to file specified on command line: %s\n", argument);
|
||||
}
|
||||
output = fopen(argument, "wb");
|
||||
if (!output) {
|
||||
fprintf(stderr, "ERROR: %s: could not open CSV file for output\n", argument);
|
||||
exit(1);
|
||||
}
|
||||
} else if (scenario_output != NULL) {
|
||||
if(verbosity > 0) {
|
||||
fprintf(stderr, "INFO: Writing output to file specified in scenario: %s\n", scenario_output);
|
||||
}
|
||||
output = fopen(scenario_output, "wb");
|
||||
if (!output) {
|
||||
fprintf(stderr, "ERROR: %s: could not open CSV file for output\n", scenario_output);
|
||||
exit(1);
|
||||
}
|
||||
} else {
|
||||
if(verbosity > 0) {
|
||||
fprintf(stderr, "INFO: Writing output to stdout.\n");
|
||||
}
|
||||
output = stdout;
|
||||
}
|
||||
|
||||
// write KML header
|
||||
if (kml_file)
|
||||
start_kml();
|
||||
|
||||
// The observant amongst you will notice that there are default values for
|
||||
// *all* keys. This information should not be spread around too well.
|
||||
// Unfortunately, this means we lack some error checking.
|
||||
|
||||
initial_lat = iniparser_getdouble(scenario, "launch-site:latitude", 0.0);
|
||||
initial_lng = iniparser_getdouble(scenario, "launch-site:longitude", 0.0);
|
||||
initial_alt = iniparser_getdouble(scenario, "launch-site:altitude", 0.0);
|
||||
|
||||
ascent_rate = iniparser_getdouble(scenario, "altitude-model:ascent-rate", 1.0);
|
||||
|
||||
// The 1.1045 comes from a magic constant buried in
|
||||
// ~cuspaceflight/public_html/predict/index.php.
|
||||
drag_coeff = iniparser_getdouble(scenario, "altitude-model:descent-rate", 1.0) * 1.1045;
|
||||
|
||||
burst_alt = iniparser_getdouble(scenario, "altitude-model:burst-altitude", 1.0);
|
||||
|
||||
rmswinderror = iniparser_getdouble(scenario, "atmosphere:wind-error", 0.0);
|
||||
if(gopt_arg(options, 'e', &argument) && strcmp(argument, "-")) {
|
||||
rmswinderror = strtod(argument, &endptr);
|
||||
if (endptr == argument) {
|
||||
fprintf(stderr, "ERROR: %s: invalid RMS wind speed error\n", argument);
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
{
|
||||
int year, month, day, hour, minute, second;
|
||||
year = iniparser_getint(scenario, "launch-time:year", -1);
|
||||
month = iniparser_getint(scenario, "launch-time:month", -1);
|
||||
day = iniparser_getint(scenario, "launch-time:day", -1);
|
||||
hour = iniparser_getint(scenario, "launch-time:hour", -1);
|
||||
minute = iniparser_getint(scenario, "launch-time:minute", -1);
|
||||
second = iniparser_getint(scenario, "launch-time:second", -1);
|
||||
|
||||
if((year >= 0) && (month >= 0) && (day >= 0) && (hour >= 0)
|
||||
&& (minute >= 0) && (second >= 0))
|
||||
{
|
||||
struct tm timeval = { 0 };
|
||||
time_t scenario_launch_time = -1;
|
||||
|
||||
if(verbosity > 0) {
|
||||
fprintf(stderr, "INFO: Using launch time from scenario: "
|
||||
"%i/%i/%i %i:%i:%i\n",
|
||||
year, month, day, hour, minute, second);
|
||||
}
|
||||
|
||||
timeval.tm_sec = second;
|
||||
timeval.tm_min = minute;
|
||||
timeval.tm_hour = hour;
|
||||
timeval.tm_mday = day; /* 1 - 31 */
|
||||
timeval.tm_mon = month - 1; /* 0 - 11 */
|
||||
timeval.tm_year = year - 1900; /* fuck you Millenium Bug! */
|
||||
|
||||
#ifndef _BSD_SOURCE
|
||||
# warning This version of mktime does not allow explicit setting of timezone.
|
||||
#else
|
||||
timeval.tm_zone = "UTC";
|
||||
#endif
|
||||
|
||||
scenario_launch_time = mktime(&timeval);
|
||||
if(scenario_launch_time <= 0) {
|
||||
fprintf(stderr, "WARN: Launch time in scenario is invalid, reverting to "
|
||||
"default timestamp.\n");
|
||||
} else {
|
||||
initial_timestamp = scenario_launch_time;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if(verbosity > 0) {
|
||||
fprintf(stderr, "INFO: Scenario loaded:\n");
|
||||
fprintf(stderr, " - Initial latitude : %lf deg N\n", initial_lat);
|
||||
fprintf(stderr, " - Initial longitude : %lf deg E\n", initial_lng);
|
||||
fprintf(stderr, " - Initial altitude : %lf m above sea level\n", initial_alt);
|
||||
fprintf(stderr, " - Initial timestamp : %li\n", initial_timestamp);
|
||||
fprintf(stderr, " - Drag coeff. : %lf\n", drag_coeff);
|
||||
if(!descent_mode) {
|
||||
fprintf(stderr, " - Ascent rate : %lf m/s\n", ascent_rate);
|
||||
fprintf(stderr, " - Burst alt. : %lf m\n", burst_alt);
|
||||
}
|
||||
fprintf(stderr, " - Windspeed err. : %f m/s\n", rmswinderror);
|
||||
}
|
||||
|
||||
{
|
||||
// do the actual stuff!!
|
||||
altitude_model_t* alt_model = altitude_model_new(descent_mode, burst_alt,
|
||||
ascent_rate, drag_coeff);
|
||||
if(!alt_model) {
|
||||
fprintf(stderr, "ERROR: error initialising altitude profile\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if (!run_model(file_cache, alt_model,
|
||||
initial_lat, initial_lng, initial_alt, initial_timestamp,
|
||||
rmswinderror)) {
|
||||
fprintf(stderr, "ERROR: error during model run!\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
altitude_model_free(alt_model);
|
||||
}
|
||||
|
||||
// release the scenario
|
||||
iniparser_freedict(scenario);
|
||||
|
||||
// write footer to KML and close output files
|
||||
if (kml_file) {
|
||||
finish_kml();
|
||||
fclose(kml_file);
|
||||
}
|
||||
|
||||
if (output != stdout) {
|
||||
fclose(output);
|
||||
}
|
||||
}
|
||||
|
||||
// release gopt data,
|
||||
gopt_free(options);
|
||||
|
||||
// release the file cache resources.
|
||||
wind_file_cache_free(file_cache);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void write_position(float lat, float lng, float alt, int timestamp) {
|
||||
if (kml_file) {
|
||||
fprintf(kml_file, "%g,%g,%g\n", lng, lat, alt);
|
||||
if (ferror(kml_file)) {
|
||||
fprintf(stderr, "ERROR: error writing to KML file\n");
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
fprintf(output, "%d,%g,%g,%g\n", timestamp, lat, lng, alt);
|
||||
if (ferror(output)) {
|
||||
fprintf(stderr, "ERROR: error writing to CSV file\n");
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
void start_kml() {
|
||||
FILE* kml_header;
|
||||
char c;
|
||||
|
||||
kml_header = fopen("kml_header", "r");
|
||||
|
||||
while (!feof(kml_header)) {
|
||||
c = fgetc(kml_header);
|
||||
if (ferror(kml_header)) {
|
||||
fprintf(stderr, "ERROR: error reading KML header file\n");
|
||||
exit(1);
|
||||
}
|
||||
if (!feof(kml_header)) fputc(c, kml_file);
|
||||
if (ferror(kml_file)) {
|
||||
fprintf(stderr, "ERROR: error writing header to KML file\n");
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
fclose(kml_header);
|
||||
}
|
||||
|
||||
void finish_kml() {
|
||||
FILE* kml_footer;
|
||||
char c;
|
||||
|
||||
kml_footer = fopen("kml_footer", "r");
|
||||
|
||||
while (!feof(kml_footer)) {
|
||||
c = fgetc(kml_footer);
|
||||
if (ferror(kml_footer)) {
|
||||
fprintf(stderr, "ERROR: error reading KML footer file\n");
|
||||
exit(1);
|
||||
}
|
||||
if (!feof(kml_footer)) fputc(c, kml_file);
|
||||
if (ferror(kml_file)) {
|
||||
fprintf(stderr, "ERROR: error writing footer to KML file\n");
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
fclose(kml_footer);
|
||||
}
|
||||
|
||||
|
|
@ -0,0 +1,28 @@
|
|||
// --------------------------------------------------------------
|
||||
// CU Spaceflight Landing Prediction
|
||||
// Copyright (c) CU Spaceflight 2009, All Right Reserved
|
||||
//
|
||||
// Written by Rob Anderson
|
||||
// Modified by Fergus Noble
|
||||
//
|
||||
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||||
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
||||
// PARTICULAR PURPOSE.
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#ifndef __PRED_H__
|
||||
#define __PRED_H__
|
||||
|
||||
#define VERSION "0.0.1"
|
||||
|
||||
// write a position entry into the output files
|
||||
void write_position(float lat, float lng, float alt, int timestamp);
|
||||
|
||||
// start and finish KML files, basically just write header and footer in
|
||||
void start_kml();
|
||||
void finish_kml();
|
||||
|
||||
#endif // __PRED_H__
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,239 @@
|
|||
// --------------------------------------------------------------
|
||||
// CU Spaceflight Landing Prediction
|
||||
// Copyright (c) CU Spaceflight 2009, All Right Reserved
|
||||
//
|
||||
// Written by Rob Anderson
|
||||
// Modified by Fergus Noble
|
||||
//
|
||||
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||||
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
||||
// PARTICULAR PURPOSE.
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#include <math.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <assert.h>
|
||||
|
||||
#include "wind/wind_file.h"
|
||||
#include "util/random.h"
|
||||
#include "run_model.h"
|
||||
#include "pred.h"
|
||||
#include "altitude.h"
|
||||
|
||||
extern int verbosity;
|
||||
|
||||
#define RADIUS_OF_EARTH 6371009.f
|
||||
|
||||
typedef struct model_state_s model_state_t;
|
||||
struct model_state_s
|
||||
{
|
||||
float lat;
|
||||
float lng;
|
||||
float alt;
|
||||
altitude_model_t *alt_model;
|
||||
double loglik;
|
||||
};
|
||||
|
||||
// Get the distance (in metres) of one degree of latitude and one degree of
|
||||
// longitude. This varys with height (not much grant you).
|
||||
static void
|
||||
_get_frame(float lat, float lng, float alt,
|
||||
float *d_dlat, float *d_dlng)
|
||||
{
|
||||
float theta, r;
|
||||
|
||||
theta = 2.f * M_PI * (90.f - lat) / 360.f;
|
||||
r = RADIUS_OF_EARTH + alt;
|
||||
|
||||
// See the differentiation section of
|
||||
// http://en.wikipedia.org/wiki/Spherical_coordinate_system
|
||||
|
||||
// d/dv = d/dlat = -d/dtheta
|
||||
*d_dlat = (2.f * M_PI) * r / 360.f;
|
||||
|
||||
// d/du = d/dlong = d/dphi
|
||||
*d_dlng = (2.f * M_PI) * r * sinf(theta) / 360.f;
|
||||
}
|
||||
|
||||
static int
|
||||
_advance_one_timestep(wind_file_cache_t* cache,
|
||||
unsigned long delta_t,
|
||||
unsigned long timestamp, unsigned long initial_timestamp,
|
||||
unsigned int n_states, model_state_t* states,
|
||||
float rmserror)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
for(i=0; i<n_states; ++i)
|
||||
{
|
||||
float ddlat, ddlng;
|
||||
float wind_v, wind_u, wind_var;
|
||||
float u_samp, v_samp, u_lik, v_lik;
|
||||
model_state_t* state = &(states[i]);
|
||||
|
||||
if(!altitude_model_get_altitude(state->alt_model,
|
||||
timestamp - initial_timestamp, &state->alt))
|
||||
return 0;
|
||||
|
||||
if(!get_wind(cache, state->lat, state->lng, state->alt, timestamp,
|
||||
&wind_v, &wind_u, &wind_var)) {
|
||||
fprintf(stderr, "ERROR: error getting wind data\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
_get_frame(state->lat, state->lng, state->alt, &ddlat, &ddlng);
|
||||
|
||||
// NOTE: it this really the right thing to be doing? - think about what
|
||||
// happens near the poles
|
||||
|
||||
wind_var += rmserror * rmserror;
|
||||
|
||||
assert(wind_var >= 0.f);
|
||||
|
||||
//fprintf(stderr, "U: %f +/- %f, V: %f +/- %f\n",
|
||||
// wind_u, sqrtf(wind_u_var),
|
||||
// wind_v, sqrtf(wind_v_var));
|
||||
|
||||
u_samp = random_sample_normal(wind_u, wind_var, &u_lik);
|
||||
v_samp = random_sample_normal(wind_v, wind_var, &v_lik);
|
||||
|
||||
//u_samp = wind_u;
|
||||
//v_samp = wind_v;
|
||||
|
||||
state->lat += v_samp * delta_t / ddlat;
|
||||
state->lng += u_samp * delta_t / ddlng;
|
||||
|
||||
state->loglik += (double)(u_lik + v_lik);
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int _state_compare_rev(const void* a, const void *b)
|
||||
{
|
||||
model_state_t* sa = (model_state_t*)a;
|
||||
model_state_t* sb = (model_state_t*)b;
|
||||
|
||||
// this returns a value s.t. the states will be sorted so that
|
||||
// the maximum likelihood state is at position 0.
|
||||
return sb->loglik - sa->loglik;
|
||||
}
|
||||
|
||||
int run_model(wind_file_cache_t* cache, altitude_model_t* alt_model,
|
||||
float initial_lat, float initial_lng, float initial_alt,
|
||||
long int initial_timestamp, float rmswinderror)
|
||||
{
|
||||
model_state_t* states;
|
||||
const unsigned int n_states = 1;
|
||||
unsigned int i;
|
||||
|
||||
states = (model_state_t*) malloc( sizeof(model_state_t) * n_states );
|
||||
|
||||
for(i=0; i<n_states; ++i)
|
||||
{
|
||||
model_state_t* state = &(states[i]);
|
||||
|
||||
state->alt = initial_alt;
|
||||
state->lat = initial_lat;
|
||||
state->lng = initial_lng;
|
||||
state->alt_model = alt_model;
|
||||
state->loglik = 0.f;
|
||||
}
|
||||
|
||||
long int timestamp = initial_timestamp;
|
||||
|
||||
int log_counter = 0; // only write position to output files every LOG_DECIMATE timesteps
|
||||
|
||||
while(_advance_one_timestep(cache, TIMESTEP, timestamp, initial_timestamp,
|
||||
n_states, states, rmswinderror))
|
||||
{
|
||||
// Sort the array of models in order of log likelihood.
|
||||
qsort(states, n_states, sizeof(model_state_t), _state_compare_rev);
|
||||
|
||||
// write the maximum likelihood state out.
|
||||
if (log_counter == LOG_DECIMATE) {
|
||||
write_position(states[0].lat, states[0].lng, states[0].alt, timestamp);
|
||||
log_counter = 0;
|
||||
}
|
||||
|
||||
log_counter++;
|
||||
timestamp += TIMESTEP;
|
||||
}
|
||||
|
||||
for(i=0; i<n_states; ++i)
|
||||
{
|
||||
model_state_t* state = &(states[i]);
|
||||
write_position(state->lat, state->lng, state->alt, timestamp);
|
||||
}
|
||||
|
||||
fprintf(stderr, "INFO: Final maximum log lik: %f (=%f)\n",
|
||||
states[0].loglik, exp(states[0].loglik));
|
||||
|
||||
free(states);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int get_wind(wind_file_cache_t* cache, float lat, float lng, float alt, long int timestamp,
|
||||
float* wind_v, float* wind_u, float *wind_var) {
|
||||
int i;
|
||||
float lambda, wu_l, wv_l, wu_h, wv_h;
|
||||
float wuvar_l, wvvar_l, wuvar_h, wvvar_h;
|
||||
wind_file_cache_entry_t* found_entries[] = { NULL, NULL };
|
||||
wind_file_t* found_files[] = { NULL, NULL };
|
||||
unsigned int earlier_ts, later_ts;
|
||||
|
||||
// look for a wind file which matches this latitude and longitude...
|
||||
wind_file_cache_find_entry(cache, lat, lng, timestamp,
|
||||
&(found_entries[0]), &(found_entries[1]));
|
||||
|
||||
if(!found_entries[0] || !found_entries[1]) {
|
||||
fprintf(stderr, "ERROR: Could not locate appropriate wind data tile for time.\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
if(!wind_file_cache_entry_contains_point(found_entries[0], lat, lng) ||
|
||||
!wind_file_cache_entry_contains_point(found_entries[1], lat, lng))
|
||||
{
|
||||
fprintf(stderr, "ERROR: Could not locate appropriate wind data tile for location "
|
||||
"lat=%f, lon=%f.\n", lat, lng);
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Look in the cache for the files we need.
|
||||
for(i=0; i<2; ++i)
|
||||
{
|
||||
found_files[i] = wind_file_cache_entry_file(found_entries[i]);
|
||||
}
|
||||
|
||||
earlier_ts = wind_file_cache_entry_timestamp(found_entries[0]);
|
||||
later_ts = wind_file_cache_entry_timestamp(found_entries[1]);
|
||||
|
||||
if(earlier_ts == later_ts)
|
||||
{
|
||||
fprintf(stderr, "WARN: Do not have two data files around current time. "
|
||||
"Expect the results to be wrong!\n");
|
||||
}
|
||||
|
||||
if(earlier_ts != later_ts)
|
||||
lambda = ((float)timestamp - (float)earlier_ts) /
|
||||
((float)later_ts - (float)earlier_ts);
|
||||
else
|
||||
lambda = 0.5f;
|
||||
|
||||
wind_file_get_wind(found_files[0], lat, lng, alt, &wu_l, &wv_l, &wuvar_l, &wvvar_l);
|
||||
wind_file_get_wind(found_files[1], lat, lng, alt, &wu_h, &wv_h, &wuvar_h, &wvvar_h);
|
||||
|
||||
*wind_u = lambda * wu_h + (1.f-lambda) * wu_l;
|
||||
*wind_v = lambda * wv_h + (1.f-lambda) * wv_l;
|
||||
|
||||
// flatten the u and v variances into a single mean variance for the
|
||||
// magnitude.
|
||||
*wind_var = 0.5f * (wuvar_h + wuvar_l + wvvar_h + wvvar_l);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
// vim:sw=4:ts=4:et:cindent
|
||||
|
|
@ -0,0 +1,40 @@
|
|||
// --------------------------------------------------------------
|
||||
// CU Spaceflight Landing Prediction
|
||||
// Copyright (c) CU Spaceflight 2009, All Right Reserved
|
||||
//
|
||||
// Written by Rob Anderson
|
||||
// Modified by Fergus Noble
|
||||
//
|
||||
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||||
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
||||
// PARTICULAR PURPOSE.
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#ifndef __RUN_MODEL_H__
|
||||
#define __RUN_MODEL_H__
|
||||
|
||||
#include "wind/wind_file_cache.h"
|
||||
#include "altitude.h"
|
||||
|
||||
// run the model
|
||||
int run_model(wind_file_cache_t* cache, altitude_model_t* alt_model,
|
||||
float initial_lat, float initial_lng, float initial_alt,
|
||||
long int initial_timestamp, float rmswinderror);
|
||||
|
||||
#define TIMESTEP 1 // in seconds
|
||||
#define LOG_DECIMATE 50 // write entry to output files every x timesteps
|
||||
|
||||
#define METRES_TO_DEGREES 0.00000899289281755 // one metre corresponds to this many degrees latitude
|
||||
#define DEGREES_TO_METRES 111198.92345 // one degree latitude corresponds to this many metres
|
||||
#define DEGREES_TO_RADIANS 0.0174532925 // 1 degree is this many radians
|
||||
|
||||
// get the wind values in the u and v directions at a point in space and time from the dataset data
|
||||
// we interpolate lat, lng, alt and time. The GRIB data only contains pressure levels so we first
|
||||
// determine which pressure levels straddle to our desired altitude and then interpolate between them
|
||||
int get_wind(wind_file_cache_t* cache, float lat, float lng, float alt, long int timestamp, float* wind_v, float* wind_u, float *wind_var);
|
||||
// note: get_wind will likely call load_data and load a different tile into data, so just be careful that data could be pointing
|
||||
// somewhere else after running get_wind
|
||||
|
||||
#endif // __RUN_MODEL_H__
|
||||
|
||||
|
|
@ -0,0 +1,128 @@
|
|||
/* getdelim.c --- Implementation of replacement getdelim function.
|
||||
Copyright (C) 1994, 1996, 1997, 1998, 2001, 2003, 2005 Free
|
||||
Software Foundation, Inc.
|
||||
|
||||
This program is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU General Public License as
|
||||
published by the Free Software Foundation; either version 2, or (at
|
||||
your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
||||
02110-1301, USA. */
|
||||
|
||||
/* Ported from glibc by Simon Josefsson. */
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
# include <config.h>
|
||||
#endif
|
||||
|
||||
#include "getdelim.h"
|
||||
|
||||
#include <limits.h>
|
||||
#include <stdlib.h>
|
||||
#include <errno.h>
|
||||
|
||||
#ifndef SIZE_MAX
|
||||
# define SIZE_MAX ((size_t) -1)
|
||||
#endif
|
||||
#ifndef SSIZE_MAX
|
||||
# define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
|
||||
#endif
|
||||
#if !HAVE_FLOCKFILE
|
||||
# undef flockfile
|
||||
# define flockfile(x) ((void) 0)
|
||||
#endif
|
||||
#if !HAVE_FUNLOCKFILE
|
||||
# undef funlockfile
|
||||
# define funlockfile(x) ((void) 0)
|
||||
#endif
|
||||
|
||||
/* Read up to (and including) a DELIMITER from FP into *LINEPTR (and
|
||||
NUL-terminate it). *LINEPTR is a pointer returned from malloc (or
|
||||
NULL), pointing to *N characters of space. It is realloc'ed as
|
||||
necessary. Returns the number of characters read (not including
|
||||
the null terminator), or -1 on error or EOF. */
|
||||
|
||||
ssize_t
|
||||
getdelim (char **lineptr, size_t *n, int delimiter, FILE *fp)
|
||||
{
|
||||
ssize_t result;
|
||||
size_t cur_len = 0;
|
||||
|
||||
if (lineptr == NULL || n == NULL || fp == NULL)
|
||||
{
|
||||
errno = EINVAL;
|
||||
return -1;
|
||||
}
|
||||
|
||||
flockfile (fp);
|
||||
|
||||
if (*lineptr == NULL || *n == 0)
|
||||
{
|
||||
*n = 120;
|
||||
*lineptr = (char *) malloc (*n);
|
||||
if (*lineptr == NULL)
|
||||
{
|
||||
result = -1;
|
||||
goto unlock_return;
|
||||
}
|
||||
}
|
||||
|
||||
for (;;)
|
||||
{
|
||||
int i;
|
||||
|
||||
i = getc (fp);
|
||||
if (i == EOF)
|
||||
{
|
||||
result = -1;
|
||||
break;
|
||||
}
|
||||
|
||||
/* Make enough space for len+1 (for final NUL) bytes. */
|
||||
if (cur_len + 1 >= *n)
|
||||
{
|
||||
size_t needed_max =
|
||||
SSIZE_MAX < SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX;
|
||||
size_t needed = 2 * *n + 1; /* Be generous. */
|
||||
char *new_lineptr;
|
||||
|
||||
if (needed_max < needed)
|
||||
needed = needed_max;
|
||||
if (cur_len + 1 >= needed)
|
||||
{
|
||||
result = -1;
|
||||
goto unlock_return;
|
||||
}
|
||||
|
||||
new_lineptr = (char *) realloc (*lineptr, needed);
|
||||
if (new_lineptr == NULL)
|
||||
{
|
||||
result = -1;
|
||||
goto unlock_return;
|
||||
}
|
||||
|
||||
*lineptr = new_lineptr;
|
||||
*n = needed;
|
||||
}
|
||||
|
||||
(*lineptr)[cur_len] = i;
|
||||
cur_len++;
|
||||
|
||||
if (i == delimiter)
|
||||
break;
|
||||
}
|
||||
(*lineptr)[cur_len] = '\0';
|
||||
result = cur_len ? cur_len : result;
|
||||
|
||||
unlock_return:
|
||||
funlockfile (fp);
|
||||
return result;
|
||||
}
|
||||
|
|
@ -0,0 +1,28 @@
|
|||
/* getdelim.h --- Prototype for replacement getdelim function.
|
||||
Copyright (C) 2005 Free Software Foundation, Inc.
|
||||
|
||||
This program is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU General Public License as
|
||||
published by the Free Software Foundation; either version 2, or (at
|
||||
your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
||||
02110-1301, USA. */
|
||||
|
||||
/* Written by Simon Josefsson. */
|
||||
|
||||
/* Get size_t, FILE, ssize_t. And getdelim, if available. */
|
||||
# include <stddef.h>
|
||||
# include <stdio.h>
|
||||
# include <sys/types.h>
|
||||
|
||||
#if !HAVE_DECL_GETDELIM
|
||||
ssize_t getdelim (char **lineptr, size_t *n, int delimiter, FILE *stream);
|
||||
#endif /* !HAVE_GETDELIM */
|
||||
|
|
@ -0,0 +1,32 @@
|
|||
/* getline.c --- Implementation of replacement getline function.
|
||||
Copyright (C) 2005 Free Software Foundation, Inc.
|
||||
|
||||
This program is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU General Public License as
|
||||
published by the Free Software Foundation; either version 2, or (at
|
||||
your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
||||
02110-1301, USA. */
|
||||
|
||||
/* Written by Simon Josefsson. */
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
# include <config.h>
|
||||
#endif
|
||||
|
||||
#include "getdelim.h"
|
||||
#include "getline.h"
|
||||
|
||||
ssize_t
|
||||
getline (char **lineptr, size_t *n, FILE *stream)
|
||||
{
|
||||
return getdelim (lineptr, n, '\n', stream);
|
||||
}
|
||||
|
|
@ -0,0 +1,28 @@
|
|||
/* getline.h --- Prototype for replacement getline function.
|
||||
Copyright (C) 2005 Free Software Foundation, Inc.
|
||||
|
||||
This program is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU General Public License as
|
||||
published by the Free Software Foundation; either version 2, or (at
|
||||
your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
||||
02110-1301, USA. */
|
||||
|
||||
/* Written by Simon Josefsson. */
|
||||
|
||||
/* Get size_t, FILE, ssize_t. And getline, if available. */
|
||||
# include <stddef.h>
|
||||
# include <stdio.h>
|
||||
# include <sys/types.h>
|
||||
|
||||
#if !HAVE_DECL_GETLINE
|
||||
ssize_t getline (char **lineptr, size_t *n, FILE *stream);
|
||||
#endif /* !HAVE_GETLINE */
|
||||
|
|
@ -0,0 +1,268 @@
|
|||
/* gopt.c version 8.1: tom.viza@gmail.com PUBLIC DOMAIN 2003-8 */
|
||||
/*
|
||||
I, Tom Vajzovic, am the author of this software and its documentation and
|
||||
permanently abandon all copyright and other intellectual property rights in
|
||||
them, including the right to be identified as the author.
|
||||
|
||||
I am fairly certain that this software does what the documentation says it
|
||||
does, but I cannot guarantee that it does, or that it does what you think it
|
||||
should, and I cannot guarantee that it will not have undesirable side effects.
|
||||
|
||||
You are free to use, modify and distribute this software as you please, but
|
||||
you do so at your own risk. If you remove or hide this warning then you are
|
||||
responsible for any problems encountered by people that you make the software
|
||||
available to.
|
||||
|
||||
Before modifying or distributing this software I ask that you would please
|
||||
read http://www.purposeful.co.uk/tfl/
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include "gopt.h"
|
||||
|
||||
#ifdef USE_SYSEXITS
|
||||
#include <sysexits.h>
|
||||
#else
|
||||
#define EX_OSERR EXIT_FAILURE
|
||||
#define EX_USAGE EXIT_FAILURE
|
||||
#endif
|
||||
|
||||
struct opt_spec_s {
|
||||
int key;
|
||||
int flags;
|
||||
const char *shorts;
|
||||
const char* const *longs;
|
||||
};
|
||||
typedef struct opt_spec_s opt_spec_t;
|
||||
|
||||
struct opt_s {
|
||||
int key;
|
||||
const char *arg;
|
||||
};
|
||||
typedef struct opt_s opt_t;
|
||||
|
||||
void *gopt_sort( int *argc, const char **argv, const void *opt_specs ){
|
||||
void *opts;
|
||||
{{{
|
||||
const char* const *arg_p= argv + 1;
|
||||
size_t opt_count= 1;
|
||||
for( ; *arg_p; ++arg_p ) {
|
||||
if( '-' == (*arg_p)[0] && (*arg_p)[1] ) {
|
||||
if( '-' == (*arg_p)[1] ) {
|
||||
if( (*arg_p)[2] ) {
|
||||
++opt_count;
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
const opt_spec_t *opt_spec_p= opt_specs;
|
||||
for( ; opt_spec_p-> key; ++opt_spec_p )
|
||||
if( strchr( opt_spec_p-> shorts, (*arg_p)[1] )){
|
||||
opt_count+= opt_spec_p-> flags & GOPT_ARG ? 1 : strlen( (*arg_p) + 1 );
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
opts= malloc( opt_count * sizeof(opt_t) );
|
||||
}}}
|
||||
{
|
||||
const char **arg_p= argv + 1;
|
||||
const char **next_operand= arg_p;
|
||||
opt_t *next_option= opts;
|
||||
|
||||
if( ! opts ){
|
||||
perror( argv[0] );
|
||||
exit( EX_OSERR );
|
||||
}
|
||||
for( ; *arg_p; ++arg_p )
|
||||
if( '-' == (*arg_p)[0] && (*arg_p)[1] )
|
||||
if( '-' == (*arg_p)[1] )
|
||||
if( (*arg_p)[2] )
|
||||
{{{
|
||||
const opt_spec_t *opt_spec_p= opt_specs;
|
||||
const char* const *longs= opt_spec_p-> longs;
|
||||
next_option-> key= 0;
|
||||
while( *longs ){
|
||||
const char *option_cp= (*arg_p) + 2;
|
||||
const char *name_cp= *longs;
|
||||
while( *option_cp && *option_cp == *name_cp ){
|
||||
++option_cp;
|
||||
++name_cp;
|
||||
}
|
||||
if( '=' == *option_cp || !*option_cp ){
|
||||
if( *name_cp ){
|
||||
if( next_option-> key ){
|
||||
fprintf( stderr, "%s: --%.*s: abbreviated option is ambiguous\n", argv[0], (int)( option_cp -( (*arg_p) + 2 )), (*arg_p) + 2 );
|
||||
free( opts );
|
||||
exit( EX_USAGE );
|
||||
}
|
||||
next_option-> key= opt_spec_p-> key;
|
||||
}
|
||||
else {
|
||||
next_option-> key= opt_spec_p-> key;
|
||||
goto found_long;
|
||||
}
|
||||
}
|
||||
if( !*++longs ){
|
||||
++opt_spec_p;
|
||||
if( opt_spec_p-> key )
|
||||
longs= opt_spec_p-> longs;
|
||||
}
|
||||
}
|
||||
if( ! next_option-> key ){
|
||||
fprintf( stderr, "%s: --%.*s: unknown option\n", argv[0], (int)strcspn( (*arg_p) + 2, "=" ), (*arg_p) + 2 );
|
||||
free( opts );
|
||||
exit( EX_USAGE );
|
||||
}
|
||||
for( opt_spec_p= opt_specs; opt_spec_p-> key != next_option-> key; ++opt_spec_p );
|
||||
found_long:
|
||||
|
||||
if( !( opt_spec_p-> flags & GOPT_REPEAT )){
|
||||
const opt_t *opt_p= opts;
|
||||
for( ; opt_p != next_option; ++opt_p )
|
||||
if( opt_p-> key == opt_spec_p-> key ){
|
||||
fprintf( stderr, "%s: --%.*s: option may not be repeated (in any long or short form)\n", argv[0], (int)strcspn( (*arg_p) + 2, "=" ), (*arg_p) + 2 );
|
||||
free( opts );
|
||||
exit( EX_USAGE );
|
||||
}
|
||||
}
|
||||
if( opt_spec_p-> flags & GOPT_ARG ){
|
||||
next_option-> arg= strchr( (*arg_p) + 2, '=' ) + 1;
|
||||
if( (char*)0 + 1 == next_option-> arg ){
|
||||
++arg_p;
|
||||
if( !*arg_p || ('-' == (*arg_p)[0] && (*arg_p)[1]) ){
|
||||
fprintf( stderr, "%s: --%s: option requires an option argument\n", argv[0], (*(arg_p-1)) + 2 );
|
||||
free( opts );
|
||||
exit( EX_USAGE );
|
||||
}
|
||||
next_option-> arg= *arg_p;
|
||||
}
|
||||
}
|
||||
else {
|
||||
if( strchr( (*arg_p) + 2, '=' )){
|
||||
fprintf( stderr, "%s: --%.*s: option may not take an option argument\n", argv[0], (int)strcspn( (*arg_p) + 2, "=" ), (*arg_p) + 2 );
|
||||
free( opts );
|
||||
exit( EX_USAGE );
|
||||
}
|
||||
next_option-> arg= NULL;
|
||||
}
|
||||
++next_option;
|
||||
}}}
|
||||
else {
|
||||
for( ++arg_p; *arg_p; ++arg_p )
|
||||
*next_operand++= *arg_p;
|
||||
break;
|
||||
}
|
||||
else
|
||||
{{{
|
||||
const char *short_opt= (*arg_p) + 1;
|
||||
for( ;*short_opt; ++short_opt ){
|
||||
const opt_spec_t *opt_spec_p= opt_specs;
|
||||
|
||||
for( ; opt_spec_p-> key; ++opt_spec_p )
|
||||
if( strchr( opt_spec_p-> shorts, *short_opt )){
|
||||
if( !( opt_spec_p-> flags & GOPT_REPEAT )){
|
||||
const opt_t *opt_p= opts;
|
||||
for( ; opt_p != next_option; ++opt_p )
|
||||
if( opt_p-> key == opt_spec_p-> key ){
|
||||
fprintf( stderr, "%s: -%c: option may not be repeated (in any long or short form)\n", argv[0], *short_opt );
|
||||
free( opts );
|
||||
exit( EX_USAGE );
|
||||
}
|
||||
}
|
||||
next_option-> key= opt_spec_p-> key;
|
||||
|
||||
if( opt_spec_p-> flags & GOPT_ARG ){
|
||||
if( short_opt[1] )
|
||||
next_option-> arg= short_opt + 1;
|
||||
|
||||
else {
|
||||
++arg_p;
|
||||
if( !*arg_p || ('-' == (*arg_p)[0] && (*arg_p)[1]) ){
|
||||
fprintf( stderr, "%s: -%c: option requires an option argument\n", argv[0], *short_opt );
|
||||
free( opts );
|
||||
exit( EX_USAGE );
|
||||
}
|
||||
next_option-> arg= *arg_p;
|
||||
}
|
||||
++next_option;
|
||||
goto break_2;
|
||||
}
|
||||
next_option-> arg= NULL;
|
||||
++next_option;
|
||||
goto continue_2;
|
||||
}
|
||||
fprintf( stderr, "%s: -%c: unknown option\n", argv[0], *short_opt );
|
||||
free( opts );
|
||||
exit( EX_USAGE );
|
||||
continue_2: ;
|
||||
}
|
||||
break_2: ;
|
||||
}}}
|
||||
else
|
||||
*next_operand++= *arg_p;
|
||||
|
||||
next_option-> key= 0;
|
||||
*next_operand= NULL;
|
||||
*argc= next_operand - argv;
|
||||
}
|
||||
return opts;
|
||||
}
|
||||
|
||||
size_t gopt( const void *vptr_opts, int key ){
|
||||
const opt_t *opts= vptr_opts;
|
||||
size_t count= 0;
|
||||
for( ; opts-> key; ++opts )
|
||||
count+= opts-> key == key;
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
size_t gopt_arg( const void *vptr_opts, int key, const char **arg ){
|
||||
const opt_t *opts= vptr_opts;
|
||||
size_t count= 0;
|
||||
|
||||
for( ; opts-> key; ++opts )
|
||||
if( opts-> key == key ){
|
||||
if( ! count )
|
||||
*arg= opts-> arg;
|
||||
++count;
|
||||
}
|
||||
return count;
|
||||
}
|
||||
|
||||
const char *gopt_arg_i( const void *vptr_opts, int key, size_t i ){
|
||||
const opt_t *opts= vptr_opts;
|
||||
|
||||
for( ; opts-> key; ++opts )
|
||||
if( opts-> key == key ){
|
||||
if( ! i )
|
||||
return opts-> arg;
|
||||
--i;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
size_t gopt_args( const void *vptr_opts, int key, const char **args, size_t args_len ){
|
||||
const char **args_stop= args + args_len;
|
||||
const char **args_ptr= args;
|
||||
const opt_t *opts= vptr_opts;
|
||||
|
||||
for( ; opts-> key; ++opts )
|
||||
if( opts-> key == key ){
|
||||
if( args_stop == args_ptr )
|
||||
return args_len + gopt( opts, key );
|
||||
|
||||
*args_ptr++= opts-> arg;
|
||||
}
|
||||
if( args_stop != args_ptr )
|
||||
*args_ptr= NULL;
|
||||
return args_ptr - args;
|
||||
}
|
||||
|
||||
void gopt_free( void *vptr_opts ){
|
||||
free( vptr_opts );
|
||||
}
|
||||
|
|
@ -0,0 +1,60 @@
|
|||
/* gopt.h version 8.1: tom.viza@gmail.com PUBLIC DOMAIN 2003-8 */
|
||||
/*
|
||||
I, Tom Vajzovic, am the author of this software and its documentation and
|
||||
permanently abandon all copyright and other intellectual property rights in
|
||||
them, including the right to be identified as the author.
|
||||
|
||||
I am fairly certain that this software does what the documentation says it
|
||||
does, but I cannot guarantee that it does, or that it does what you think it
|
||||
should, and I cannot guarantee that it will not have undesirable side effects.
|
||||
|
||||
You are free to use, modify and distribute this software as you please, but
|
||||
you do so at your own risk. If you remove or hide this warning then you are
|
||||
responsible for any problems encountered by people that you make the software
|
||||
available to.
|
||||
|
||||
Before modifying or distributing this software I ask that you would please
|
||||
read http://www.purposeful.co.uk/tfl/
|
||||
*/
|
||||
|
||||
#ifndef GOPT_H_INCLUDED
|
||||
#define GOPT_H_INCLUDED
|
||||
|
||||
#define GOPT_ONCE 0
|
||||
#define GOPT_REPEAT 1
|
||||
#define GOPT_NOARG 0
|
||||
#define GOPT_ARG 2
|
||||
|
||||
#define gopt_start(...) (const void*)( const struct { int k; int f; const char *s; const char*const*l; }[]){ __VA_ARGS__, {0}}
|
||||
#define gopt_option(k,f,s,l) { k, f, s, l }
|
||||
#define gopt_shorts( ... ) (const char*)(const char[]){ __VA_ARGS__, 0 }
|
||||
#define gopt_longs( ... ) (const char**)(const char*[]){ __VA_ARGS__, NULL }
|
||||
|
||||
|
||||
void *gopt_sort( int *argc, const char **argv, const void *opt_specs );
|
||||
/* returns a pointer for use in the following calls
|
||||
* prints to stderr and call exit() on error
|
||||
*/
|
||||
size_t gopt( const void *opts, int key );
|
||||
/* returns the number of times the option was specified
|
||||
* which will be 0 or 1 unless GOPT_REPEAT was used
|
||||
*/
|
||||
size_t gopt_arg( const void *opts, int key, const char **arg );
|
||||
/* returns the number of times the option was specified
|
||||
* writes a pointer to the option argument from the first (or only) occurance to *arg
|
||||
*/
|
||||
const char *gopt_arg_i( const void *opts, int key, size_t i );
|
||||
/* returns a pointer to the ith (starting at zero) occurance
|
||||
* of the option, or NULL if it was not specified that many times
|
||||
*/
|
||||
size_t gopt_args( const void *opts, int key, const char **args, size_t args_len );
|
||||
/* returns the number of times the option was specified
|
||||
* writes pointers to the option arguments in the order of occurance to args[].
|
||||
* writes at most args_len pointers
|
||||
* if the return value is less than args_len, also writes a null pointer
|
||||
*/
|
||||
void gopt_free( void *opts );
|
||||
/* releases memory allocated in the corresponding call to gopt_sort()
|
||||
* opts can no longer be used
|
||||
*/
|
||||
#endif /* GOPT_H_INCLUDED */
|
||||
|
|
@ -0,0 +1,52 @@
|
|||
// --------------------------------------------------------------
|
||||
// CU Spaceflight Landing Prediction
|
||||
// Copyright (c) CU Spaceflight 2009, All Right Reserved
|
||||
//
|
||||
// Written by Rich Wareham <rjw57@cam.ac.uk>
|
||||
//
|
||||
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||||
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
||||
// PARTICULAR PURPOSE.
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#include "random.h"
|
||||
|
||||
#include <glib.h>
|
||||
#include <math.h>
|
||||
|
||||
// Sample from a normal distribution with zero mean and unit variance.
|
||||
// See http://en.wikipedia.org/wiki/Normal_distribution
|
||||
// #Generating_values_for_normal_random_variables
|
||||
static float _random_sample_normal_intl(float* loglik)
|
||||
{
|
||||
double u, v = 0.0;
|
||||
static const double k = 0.918938533204673; // = 0.5 * (log(2) + log(pi)), see below.
|
||||
|
||||
u = g_random_double();
|
||||
v = g_random_double();
|
||||
v = sqrt(-2.0 * log(u)) * cos(2.0 * G_PI * v);
|
||||
|
||||
// actual likelihood is 1/sqrt(2*pi) exp(-(x^2)) since mu = 0 and sigma^2 = 1.
|
||||
// log-likelihood is therefore:
|
||||
// \ell(x) = - (x^2) - 0.5 * (log(2) + log(pi)) = - (x^2) - k
|
||||
|
||||
if(loglik)
|
||||
*loglik = (float) ( - (v*v) - k );
|
||||
|
||||
return v;
|
||||
}
|
||||
|
||||
float random_sample_normal(float mu, float sigma2, float *loglik)
|
||||
{
|
||||
// Sample from our base case.
|
||||
float v = _random_sample_normal_intl(loglik);
|
||||
|
||||
// Transform into appropriate range.
|
||||
v *= sqrt(sigma2);
|
||||
v += mu;
|
||||
|
||||
return v;
|
||||
}
|
||||
|
||||
// vim:sw=4:ts=4:et:cindent
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
// --------------------------------------------------------------
|
||||
// CU Spaceflight Landing Prediction
|
||||
// Copyright (c) CU Spaceflight 2009, All Right Reserved
|
||||
//
|
||||
// Written by Rich Wareham <rjw57@cam.ac.uk>
|
||||
//
|
||||
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||||
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
||||
// PARTICULAR PURPOSE.
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#ifndef __RANDOM_H__
|
||||
#define __RANDOM_H__
|
||||
|
||||
// Return a random sample drawn from the normal distribution with mean mu and
|
||||
// variance sigma2. If loglik is non-NULL, *loglik is set to the log-likelihood
|
||||
// of drawing that sample.
|
||||
float random_sample_normal(float mu, float sigma2, float *loglik);
|
||||
|
||||
#endif /* __RANDOM_H__ */
|
||||
|
||||
// vim:sw=4:ts=4:et:cindent
|
||||
|
|
@ -0,0 +1,786 @@
|
|||
// --------------------------------------------------------------
|
||||
// CU Spaceflight Landing Prediction
|
||||
// Copyright (c) CU Spaceflight 2009, All Right Reserved
|
||||
//
|
||||
// Written by Rich Wareham <rjw57@cam.ac.uk>
|
||||
//
|
||||
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||||
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
||||
// PARTICULAR PURPOSE.
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#include "wind_file.h"
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <assert.h>
|
||||
#include <math.h>
|
||||
|
||||
#include "../util/getline.h"
|
||||
|
||||
extern int verbosity;
|
||||
|
||||
typedef struct wind_file_axis_s wind_file_axis_t;
|
||||
struct wind_file_axis_s
|
||||
{
|
||||
unsigned int n_values;
|
||||
|
||||
// in actual fact, enough space is allocated for all values.
|
||||
float values[1];
|
||||
};
|
||||
|
||||
struct wind_file_s
|
||||
{
|
||||
// This is from the file header.
|
||||
float lat, latrad;
|
||||
float lon, lonrad;
|
||||
unsigned long timestamp;
|
||||
|
||||
// This describes the axes.
|
||||
unsigned int n_axes;
|
||||
wind_file_axis_t **axes;
|
||||
|
||||
unsigned int n_components;
|
||||
|
||||
// A pointer to the actual data.
|
||||
float *data;
|
||||
};
|
||||
|
||||
// These exciting functions are all to do with the fact that 'left' and 'right'
|
||||
// is an interesting thing to talk about on a sphere.
|
||||
|
||||
// Canonicalise a longitude into the range (0, 360].
|
||||
static float
|
||||
_canonicalise_longitude(float lon)
|
||||
{
|
||||
lon = fmodf(lon, 360.f);
|
||||
if(lon < 0.f)
|
||||
lon += 360.f;
|
||||
assert((lon >= 0.f) && (lon < 360.f));
|
||||
return lon;
|
||||
}
|
||||
|
||||
// Return the 'distance' between two canonical longitudes. This will never
|
||||
// exceed 180 degrees.
|
||||
static float
|
||||
_longitude_distance(float lon_a, float lon_b)
|
||||
{
|
||||
float d1 = fabsf(lon_a - lon_b);
|
||||
float d2 = 360.f - d1;
|
||||
return (d1 < d2) ? d1 : d2;
|
||||
}
|
||||
|
||||
// Given two canonical longitudes, return non-zero iff lon_a is 'left' of lon_b
|
||||
// or the same. 'Left' means that the number of degrees east one needs to go
|
||||
// from lon_a to get to lon_b is < 180.
|
||||
static int
|
||||
_longitude_is_left_of(float lon_a, float lon_b)
|
||||
{
|
||||
float deg_east;
|
||||
|
||||
lon_a = _canonicalise_longitude(lon_a);
|
||||
lon_b = _canonicalise_longitude(lon_b);
|
||||
|
||||
deg_east = lon_b - lon_a;
|
||||
if(deg_east < 0.f)
|
||||
deg_east += 360.f;
|
||||
if(deg_east >= 360.f)
|
||||
deg_east -= 360.f;
|
||||
|
||||
assert((deg_east >= 0.f) && (deg_east < 360.f));
|
||||
|
||||
return deg_east < 180.f;
|
||||
}
|
||||
|
||||
// Given two values return non-zero iff a is 'left' of b, i.e. a <= b.
|
||||
static int
|
||||
_float_is_left_of(float a, float b)
|
||||
{
|
||||
return a <= b;
|
||||
}
|
||||
|
||||
// Given an axis, find the indicies of those values left and right of 'value'.
|
||||
// Return non-zero if 'value' is outside of the axis range. Left is defined as
|
||||
// 'rightmost value A where left_fun(A,value) returns non-zero' and 'right' is
|
||||
// defined as 'leftmost value where left_fun(value,A) returns non-zero'.
|
||||
static int
|
||||
_wind_file_axis_find_value(wind_file_axis_t* axis, float value,
|
||||
int (*left_fun) (float a, float b),
|
||||
unsigned int* left, unsigned int* right)
|
||||
{
|
||||
// NOTE: This function can't assume the axis is ordered since
|
||||
// at least longitude doesn't work that way. Similarly pressure is
|
||||
// ordered greatest to smallest and latitude is ordered smallest to
|
||||
// greatest.
|
||||
|
||||
unsigned int i;
|
||||
float lval, rval;
|
||||
|
||||
*left = *right = axis->n_values;
|
||||
lval = rval = 0.f;
|
||||
|
||||
// Look over all axis values.
|
||||
for(i=0; i<axis->n_values; ++i)
|
||||
{
|
||||
float axval = axis->values[i];
|
||||
if((!left_fun(axval,lval) || (*left==axis->n_values)) && left_fun(axval, value))
|
||||
{
|
||||
*left = i;
|
||||
lval = axval;
|
||||
}
|
||||
if((!left_fun(rval,axval) || (*right==axis->n_values)) && left_fun(value, axval))
|
||||
{
|
||||
*right = i;
|
||||
rval = axval;
|
||||
}
|
||||
}
|
||||
return (*left != axis->n_values) && (*right != axis->n_values);
|
||||
}
|
||||
|
||||
// Scan forward in 'file' looking for the first line which is a non-comment
|
||||
// line. Update *line with a pointer to the line which should be free-ed after
|
||||
// use and update *n with the number of characters in that line.
|
||||
static
|
||||
int _get_non_comment_line(char** line, size_t *n, FILE* file)
|
||||
{
|
||||
*line = NULL;
|
||||
while((getline(line, n, file) >= 0) && ((*line)[0] == '#'))
|
||||
{
|
||||
// line does not need to be free-ed since getline will realloc
|
||||
// it if it is too small. See getline(3).
|
||||
}
|
||||
|
||||
if(feof(file)) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
return *n;
|
||||
}
|
||||
|
||||
// Parse a line of the form value1,value2,...,valueN and add the values to the
|
||||
// values array of axis. This array should have already been allocated and the
|
||||
// function ignores any values beyond the number indicated in n_values.
|
||||
//
|
||||
// Returns non-zero on success.
|
||||
static int
|
||||
_parse_values_line(const char* line, unsigned int n_values, float* values)
|
||||
{
|
||||
unsigned int record_idx = 0;
|
||||
const char* record = line;
|
||||
float value;
|
||||
|
||||
while(1 == sscanf(record, "%f", &value)) {
|
||||
if(record_idx >= n_values)
|
||||
{
|
||||
if(verbosity > 0)
|
||||
fprintf(stderr, "WARN: Read too many values for axis "
|
||||
"(%i, expected %i). "
|
||||
"Ignoring them.\n",
|
||||
record_idx, n_values);
|
||||
} else {
|
||||
values[record_idx] = value;
|
||||
}
|
||||
|
||||
// skip to end of record
|
||||
while((*record != ',') && (*record != '\n') && (*record != '\0'))
|
||||
record++;
|
||||
|
||||
// and advance past delimiter
|
||||
if(record != '\0')
|
||||
record++;
|
||||
|
||||
// update the record index
|
||||
record_idx ++;
|
||||
}
|
||||
|
||||
// we define success as reading the number of values we expected.
|
||||
return record_idx == n_values;
|
||||
}
|
||||
|
||||
wind_file_t*
|
||||
wind_file_new(const char* filepath)
|
||||
{
|
||||
FILE* file;
|
||||
char* line = NULL;
|
||||
size_t line_len;
|
||||
int num_lines, num_axes, num_components, i;
|
||||
wind_file_t* self;
|
||||
|
||||
if(verbosity > 0)
|
||||
fprintf(stderr, "INFO: Loading wind data from '%s'.\n", filepath);
|
||||
|
||||
file = fopen(filepath, "r");
|
||||
if(!file) {
|
||||
perror("ERROR: Could not open file.");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
// get the header
|
||||
if(0 > _get_non_comment_line(&line, &line_len, file))
|
||||
{
|
||||
fprintf(stderr, "ERROR: EOF before header.\n");
|
||||
fclose(file);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
self = (wind_file_t*)malloc(sizeof(wind_file_t));
|
||||
self->n_axes = 0;
|
||||
self->axes = NULL;
|
||||
self->data = NULL;
|
||||
|
||||
if(5 != sscanf(line, "%f,%f,%f,%f,%ld",
|
||||
&self->lat, &self->latrad,
|
||||
&self->lon, &self->lonrad,
|
||||
&self->timestamp))
|
||||
{
|
||||
fprintf(stderr, "ERROR: Error parsing header '%s'.\n", line);
|
||||
free(line);
|
||||
fclose(file);
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
free(line);
|
||||
|
||||
// get the axis count
|
||||
if(0 > _get_non_comment_line(&line, &line_len, file))
|
||||
{
|
||||
fprintf(stderr, "ERROR: EOF before axis count.\n");
|
||||
fclose(file);
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
num_axes = atoi(line);
|
||||
free(line);
|
||||
|
||||
self->n_axes = num_axes;
|
||||
|
||||
// use calloc(3) so that we initialise everything to NULL.
|
||||
self->axes = (wind_file_axis_t**)calloc(num_axes, sizeof(wind_file_axis_t*));
|
||||
|
||||
// process each axis
|
||||
for(i=0; i<num_axes; ++i)
|
||||
{
|
||||
int num_values;
|
||||
|
||||
// get the value count for this axis
|
||||
if(0 > _get_non_comment_line(&line, &line_len, file))
|
||||
{
|
||||
fprintf(stderr, "ERROR: EOF before axis value count.\n");
|
||||
fclose(file);
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
num_values = atoi(line);
|
||||
free(line);
|
||||
|
||||
if(num_values < 1)
|
||||
{
|
||||
fprintf(stderr, "ERROR: axis %i count is < 1.\n", i);
|
||||
fclose(file);
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
self->axes[i] = (wind_file_axis_t*)
|
||||
malloc(sizeof(wind_file_axis_t) + sizeof(float)*(num_values-1));
|
||||
self->axes[i]->n_values = num_values;
|
||||
|
||||
// get the axis line
|
||||
if(0 > _get_non_comment_line(&line, &line_len, file))
|
||||
{
|
||||
fprintf(stderr, "ERROR: EOF before axis value line.\n");
|
||||
fclose(file);
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if(!_parse_values_line(line, self->axes[i]->n_values, self->axes[i]->values))
|
||||
{
|
||||
fprintf(stderr, "ERROR: Error parsing axis value line.\n");
|
||||
fclose(file);
|
||||
free(line);
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
free(line);
|
||||
}
|
||||
|
||||
// get the line count
|
||||
if(0 > _get_non_comment_line(&line, &line_len, file))
|
||||
{
|
||||
fprintf(stderr, "ERROR: EOF before line count.\n");
|
||||
fclose(file);
|
||||
free(line);
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
num_lines = atoi(line);
|
||||
free(line);
|
||||
|
||||
// get the datum component count
|
||||
if(0 > _get_non_comment_line(&line, &line_len, file))
|
||||
{
|
||||
fprintf(stderr, "ERROR: EOF before datum component count.\n");
|
||||
fclose(file);
|
||||
free(line);
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
num_components = atoi(line);
|
||||
free(line);
|
||||
self->n_components = num_components;
|
||||
|
||||
// check number of lines matches what we expect
|
||||
{
|
||||
int expected_line_count = 1;
|
||||
for(i=0; i<self->n_axes; ++i)
|
||||
{
|
||||
expected_line_count *= self->axes[i]->n_values;
|
||||
}
|
||||
if(expected_line_count != num_lines)
|
||||
{
|
||||
fprintf(stderr, "ERROR: Data axes imply %i records. "
|
||||
"The file header claims %i.\n",
|
||||
expected_line_count,
|
||||
num_lines);
|
||||
fclose(file);
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
if(verbosity > 0)
|
||||
fprintf(stderr, "INFO: Data is %i axis made up of "
|
||||
"(%i records) x (%i components).\n",
|
||||
num_axes, num_lines, num_components);
|
||||
|
||||
// we have everything we need to actually read the data now. Allocate an
|
||||
// array to store it.
|
||||
self->data = (float*)malloc(sizeof(float) * num_lines * num_components);
|
||||
|
||||
// and iterate reading data. FIXME: Extra data is currently ignored silently.
|
||||
// we should probably check there are no non-comment lines after the data.
|
||||
for(i=0; i<num_lines; ++i)
|
||||
{
|
||||
if((0 > _get_non_comment_line(&line, &line_len, file)) ||
|
||||
(!_parse_values_line(line, num_components, &(self->data[num_components*i]))))
|
||||
{
|
||||
fprintf(stderr, "ERROR: Could not parse data line %i of file. "
|
||||
"The file may be corrupt or truncated.\n",
|
||||
i);
|
||||
free(line);
|
||||
fclose(file);
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
// if we succeed, we need to free the line.
|
||||
free(line);
|
||||
}
|
||||
|
||||
// close the file since we're done with it now.
|
||||
fclose(file);
|
||||
|
||||
if(self->n_axes != 3)
|
||||
{
|
||||
fprintf(stderr, "ERROR: Expected 3 axes in file.\n");
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if(self->n_components != 3)
|
||||
{
|
||||
fprintf(stderr, "ERROR: Expected 3 component data in file.\n");
|
||||
wind_file_free(self);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return self;
|
||||
}
|
||||
|
||||
void
|
||||
wind_file_free(wind_file_t* file)
|
||||
{
|
||||
if(!file)
|
||||
return;
|
||||
|
||||
if(file->n_axes > 0)
|
||||
{
|
||||
unsigned int i;
|
||||
for(i=0; i<file->n_axes; ++i)
|
||||
{
|
||||
if(file->axes[i])
|
||||
{
|
||||
free(file->axes[i]);
|
||||
}
|
||||
}
|
||||
free(file->axes);
|
||||
}
|
||||
|
||||
if(file->data)
|
||||
{
|
||||
free(file->data);
|
||||
}
|
||||
|
||||
free(file);
|
||||
}
|
||||
|
||||
static float*
|
||||
_wind_file_get_record(wind_file_t* file,
|
||||
unsigned int lat_idx, unsigned int lon_idx,
|
||||
unsigned int pressure_idx)
|
||||
{
|
||||
size_t offset = file->n_components *
|
||||
(lon_idx +
|
||||
file->axes[2]->n_values *
|
||||
(lat_idx + file->axes[1]->n_values * pressure_idx));
|
||||
return &(file->data[offset]);
|
||||
}
|
||||
|
||||
static float
|
||||
_wind_file_get_height(wind_file_t* file,
|
||||
unsigned int lat_idx, unsigned int lon_idx,
|
||||
unsigned int pressure_idx)
|
||||
{
|
||||
return _wind_file_get_record(file, lat_idx, lon_idx, pressure_idx)[0];
|
||||
}
|
||||
|
||||
static void
|
||||
_wind_file_get_wind_raw(wind_file_t* file,
|
||||
unsigned int lat_idx, unsigned int lon_idx,
|
||||
unsigned int pressure_idx,
|
||||
float *u, float* v)
|
||||
{
|
||||
float* record = _wind_file_get_record(file, lat_idx, lon_idx, pressure_idx);
|
||||
*u = record[1]; *v = record[2];
|
||||
}
|
||||
|
||||
static float
|
||||
_lerp(float a, float b, float lambda)
|
||||
{
|
||||
return a * (1.f - lambda) + b * lambda;
|
||||
}
|
||||
|
||||
static float
|
||||
_bilinear_interpolate(float ll, float lr, float rl, float rr, float lambda1, float lambda2)
|
||||
{
|
||||
float il = _lerp(ll, rl, lambda1);
|
||||
float ir = _lerp(lr, rr, lambda1);
|
||||
return _lerp(il,ir,lambda2);
|
||||
}
|
||||
|
||||
void
|
||||
wind_file_get_wind(wind_file_t* file, float lat, float lon, float height,
|
||||
float* windu, float *windv, float *uvar, float *vvar)
|
||||
{
|
||||
// we use static variables to 'cache' the last left and right lat/longs
|
||||
// and heights so that we can avoid searching the axes if necessary
|
||||
static int have_valid_latlon_cache = 0;
|
||||
static int have_valid_pressure_cache = 0;
|
||||
|
||||
static unsigned int left_lat_idx, right_lat_idx;
|
||||
static unsigned int left_lon_idx, right_lon_idx;
|
||||
static unsigned int left_pr_idx, right_pr_idx;
|
||||
|
||||
static float left_lat, right_lat;
|
||||
static float left_lon, right_lon;
|
||||
|
||||
int i;
|
||||
float left_height, right_height;
|
||||
float lat_lambda, lon_lambda, pr_lambda;
|
||||
|
||||
assert(file);
|
||||
assert(windu && windv);
|
||||
|
||||
// canonicalise the longitude
|
||||
lon = _canonicalise_longitude(lon);
|
||||
|
||||
// by default, return nothing in case of error.
|
||||
*windu = *windv = 0.f;
|
||||
|
||||
// see if the cache is indeed valid
|
||||
if(have_valid_latlon_cache)
|
||||
{
|
||||
if((left_lat > lat) ||
|
||||
(right_lat < lat) ||
|
||||
!_longitude_is_left_of(left_lon, lon) ||
|
||||
!_longitude_is_left_of(lon, right_lon))
|
||||
{
|
||||
have_valid_latlon_cache = 0;
|
||||
}
|
||||
}
|
||||
|
||||
// if we have no cached grid locations, look for them.
|
||||
if(!have_valid_latlon_cache)
|
||||
{
|
||||
// look for latitude along second axis
|
||||
if(!_wind_file_axis_find_value(file->axes[1], lat,
|
||||
_float_is_left_of, &left_lat_idx, &right_lat_idx))
|
||||
{
|
||||
if(verbosity > 0)
|
||||
fprintf(stderr, "WARN: Latitude %f is not covered by file.\n", lat);
|
||||
return;
|
||||
}
|
||||
left_lat = file->axes[1]->values[left_lat_idx];
|
||||
right_lat = file->axes[1]->values[right_lat_idx];
|
||||
|
||||
// look for longitude along third axis
|
||||
if(!_wind_file_axis_find_value(file->axes[2], lon,
|
||||
_longitude_is_left_of, &left_lon_idx, &right_lon_idx))
|
||||
{
|
||||
if(verbosity > 0)
|
||||
fprintf(stderr, "WARN: Longitude %f is not covered by file.\n", lon);
|
||||
return;
|
||||
}
|
||||
left_lon = file->axes[2]->values[left_lon_idx];
|
||||
right_lon = file->axes[2]->values[right_lon_idx];
|
||||
|
||||
if(verbosity > 1)
|
||||
fprintf(stderr, "INFO: Moved to latitude/longitude "
|
||||
"cell (%f,%f)-(%f,%f)\n",
|
||||
left_lat, left_lon, right_lat, right_lon);
|
||||
|
||||
have_valid_latlon_cache = 1;
|
||||
}
|
||||
|
||||
// compute the normalised lat/lon co-ordinate within the cell we're in.
|
||||
if(left_lat_idx != right_lat_idx)
|
||||
lat_lambda = (lat - left_lat) / (right_lat - left_lat);
|
||||
else
|
||||
lat_lambda = 0.5f;
|
||||
|
||||
if(left_lon_idx != right_lon_idx)
|
||||
lon_lambda = _longitude_distance(lon, left_lon)
|
||||
/ _longitude_distance(right_lon, left_lon);
|
||||
else
|
||||
lon_lambda = 0.5f;
|
||||
|
||||
// munge the lambdas into the right range. Numerical approximations can nudge them
|
||||
// ~1e-08 either side sometimes.
|
||||
lat_lambda = (lat_lambda < 0.f) ? 0.f : lat_lambda;
|
||||
lat_lambda = (lat_lambda > 1.f) ? 1.f : lat_lambda;
|
||||
lon_lambda = (lon_lambda < 0.f) ? 0.f : lon_lambda;
|
||||
lon_lambda = (lon_lambda > 1.f) ? 1.f : lon_lambda;
|
||||
|
||||
// use this normalised co-ordinate to check the left and right heights
|
||||
if(have_valid_pressure_cache)
|
||||
{
|
||||
float ll_height, lr_height, rl_height, rr_height;
|
||||
|
||||
// left
|
||||
ll_height = _wind_file_get_height(file, left_lat_idx, left_lon_idx, left_pr_idx);
|
||||
lr_height = _wind_file_get_height(file, left_lat_idx, right_lon_idx, left_pr_idx);
|
||||
rl_height = _wind_file_get_height(file, right_lat_idx, left_lon_idx, left_pr_idx);
|
||||
rr_height = _wind_file_get_height(file, right_lat_idx, right_lon_idx, left_pr_idx);
|
||||
left_height = _bilinear_interpolate(ll_height, lr_height, rl_height, rr_height,
|
||||
lat_lambda, lon_lambda);
|
||||
// if the leftmost height is too small and we can go lower...
|
||||
if((left_height > height) && (left_pr_idx > 0))
|
||||
have_valid_pressure_cache = 0;
|
||||
|
||||
// right
|
||||
ll_height = _wind_file_get_height(file, left_lat_idx, left_lon_idx, right_pr_idx);
|
||||
lr_height = _wind_file_get_height(file, left_lat_idx, right_lon_idx, right_pr_idx);
|
||||
rl_height = _wind_file_get_height(file, right_lat_idx, left_lon_idx, right_pr_idx);
|
||||
rr_height = _wind_file_get_height(file, right_lat_idx, right_lon_idx, right_pr_idx);
|
||||
right_height = _bilinear_interpolate(ll_height, lr_height, rl_height, rr_height,
|
||||
lat_lambda, lon_lambda);
|
||||
// if the rightmost height is too small and we can go higher...
|
||||
if((right_height < height) && (right_pr_idx < file->axes[0]->n_values-1))
|
||||
have_valid_pressure_cache = 0;
|
||||
}
|
||||
|
||||
// if our height cache is out of whack, find a better cell.
|
||||
if(!have_valid_pressure_cache)
|
||||
{
|
||||
// search along all heights to find what pressure level we're at
|
||||
left_pr_idx = right_pr_idx = file->axes[0]->n_values;
|
||||
left_height = right_height = -1.f;
|
||||
for(i=0; i<file->axes[0]->n_values; ++i)
|
||||
{
|
||||
// get heights for each corner of our lat/lon cell.
|
||||
float ll_height = _wind_file_get_height(file,
|
||||
left_lat_idx, left_lon_idx, i);
|
||||
float lr_height = _wind_file_get_height(file,
|
||||
left_lat_idx, right_lon_idx, i);
|
||||
float rl_height = _wind_file_get_height(file,
|
||||
right_lat_idx, left_lon_idx, i);
|
||||
float rr_height = _wind_file_get_height(file,
|
||||
right_lat_idx, right_lon_idx, i);
|
||||
|
||||
// interpolate within our cell.
|
||||
float interp_height = _bilinear_interpolate(
|
||||
ll_height, lr_height, rl_height, rr_height,
|
||||
lat_lambda, lon_lambda);
|
||||
|
||||
if((interp_height <= height) &&
|
||||
((interp_height >= left_height) ||
|
||||
(left_pr_idx == file->axes[0]->n_values)))
|
||||
{
|
||||
left_pr_idx = i;
|
||||
left_height = interp_height;
|
||||
}
|
||||
|
||||
if((interp_height >= height) &&
|
||||
((interp_height <= right_height) ||
|
||||
(right_pr_idx == file->axes[0]->n_values)))
|
||||
{
|
||||
right_pr_idx = i;
|
||||
right_height = interp_height;
|
||||
}
|
||||
}
|
||||
|
||||
if(left_pr_idx == file->axes[0]->n_values)
|
||||
{
|
||||
left_pr_idx = right_pr_idx;
|
||||
if(verbosity > 0)
|
||||
fprintf(stderr, "WARN: Moved to %.2fm, below height where we "
|
||||
"have data. "
|
||||
"Assuming we're at %.fmb or approx. %.2fm.\n",
|
||||
height,
|
||||
file->axes[0]->values[left_pr_idx],
|
||||
_wind_file_get_height(file,
|
||||
left_lat_idx, left_lon_idx, left_pr_idx));
|
||||
}
|
||||
|
||||
if(right_pr_idx == file->axes[0]->n_values)
|
||||
{
|
||||
right_pr_idx = left_pr_idx;
|
||||
if(verbosity > 0)
|
||||
fprintf(stderr, "WARN: Moved to %.2fm, above height where we "
|
||||
"have data. "
|
||||
"Assuming we're at %.fmb or approx. %.2fm.\n",
|
||||
height,
|
||||
file->axes[0]->values[right_pr_idx],
|
||||
_wind_file_get_height(file,
|
||||
left_lat_idx, left_lon_idx, right_pr_idx));
|
||||
}
|
||||
|
||||
if((left_pr_idx == file->axes[0]->n_values) ||
|
||||
(right_pr_idx == file->axes[0]->n_values))
|
||||
{
|
||||
fprintf(stderr, "ERROR: Moved to a totally stupid height (%f). "
|
||||
"Giving up!\n", height);
|
||||
return;
|
||||
}
|
||||
|
||||
if(verbosity > 1)
|
||||
fprintf(stderr, "INFO: Moved to pressure cell (%.fmb, %.fmb)\n",
|
||||
file->axes[0]->values[left_pr_idx],
|
||||
file->axes[0]->values[right_pr_idx]);
|
||||
|
||||
have_valid_pressure_cache = 1;
|
||||
}
|
||||
|
||||
// compute the normalised pressure co-ordinate within the cell we're in.
|
||||
if(left_pr_idx != right_pr_idx)
|
||||
pr_lambda = (height - left_height) / (right_height - left_height);
|
||||
else
|
||||
pr_lambda = 0.5f;
|
||||
|
||||
// pr_lambda might be outside of the range [0,1] depending on if we went
|
||||
// above or below our data, munge it appropriately.
|
||||
pr_lambda = (pr_lambda < 0.f) ? 0.f : pr_lambda;
|
||||
pr_lambda = (pr_lambda > 1.f) ? 1.f : pr_lambda;
|
||||
|
||||
assert(lat_lambda >= 0.f);
|
||||
assert(lon_lambda >= 0.f);
|
||||
assert(pr_lambda >= 0.f);
|
||||
assert(lat_lambda <= 1.f);
|
||||
assert(lon_lambda <= 1.f);
|
||||
assert(pr_lambda <= 1.f);
|
||||
|
||||
// By this point we have left/right co-ordinates which describe the
|
||||
// latitude, longitude and pressure boundaries of our data cell along
|
||||
// with normalised co-ordinates within it. We can now actually find
|
||||
// some data...
|
||||
//
|
||||
// We compute the lerped u and v along with the neighbourhood mean and
|
||||
// square mean to calculate the neighbourhood variance.
|
||||
{
|
||||
float llu, lru, rlu, rru;
|
||||
float llv, lrv, rlv, rrv;
|
||||
|
||||
float lowu, lowv, highu, highv;
|
||||
|
||||
float umean = 0.f;
|
||||
float usqmean = 0.f;
|
||||
float vmean = 0.f;
|
||||
float vsqmean = 0.f;
|
||||
|
||||
// let's get the wind u and v for the lower lat/lon cell
|
||||
_wind_file_get_wind_raw(file,
|
||||
left_lat_idx, left_lon_idx, left_pr_idx, &llu, &llv);
|
||||
_wind_file_get_wind_raw(file,
|
||||
left_lat_idx, right_lon_idx, left_pr_idx, &lru, &lrv);
|
||||
_wind_file_get_wind_raw(file,
|
||||
right_lat_idx, left_lon_idx, left_pr_idx, &rlu, &rlv);
|
||||
_wind_file_get_wind_raw(file,
|
||||
right_lat_idx, right_lon_idx, left_pr_idx, &rru, &rrv);
|
||||
|
||||
lowu = _bilinear_interpolate(llu, lru, rlu, rru, lat_lambda, lon_lambda);
|
||||
lowv = _bilinear_interpolate(llv, lrv, rlv, rrv, lat_lambda, lon_lambda);
|
||||
|
||||
umean = llu + lru + rlu + rru;
|
||||
vmean = llv + lrv + rlv + rrv;
|
||||
usqmean = llu*llu + lru*lru + rlu*rlu + rru*rru;
|
||||
vsqmean = llv*llv + lrv*lrv + rlv*rlv + rrv*rrv;
|
||||
|
||||
/*
|
||||
lowusq = _bilinear_interpolate(llu*llu, lru*lru, rlu*rlu, rru*rru,
|
||||
lat_lambda, lon_lambda);
|
||||
lowvsq = _bilinear_interpolate(llv*llv, lrv*lrv, rlv*rlv, rrv*rrv,
|
||||
lat_lambda, lon_lambda);
|
||||
*/
|
||||
|
||||
// let's get the wind u and v for the upper lat/lon cell
|
||||
_wind_file_get_wind_raw(file,
|
||||
left_lat_idx, left_lon_idx, right_pr_idx, &llu, &llv);
|
||||
_wind_file_get_wind_raw(file,
|
||||
left_lat_idx, right_lon_idx, right_pr_idx, &lru, &lrv);
|
||||
_wind_file_get_wind_raw(file,
|
||||
right_lat_idx, left_lon_idx, right_pr_idx, &rlu, &rlv);
|
||||
_wind_file_get_wind_raw(file,
|
||||
right_lat_idx, right_lon_idx, right_pr_idx, &rru, &rrv);
|
||||
|
||||
highu = _bilinear_interpolate(llu, lru, rlu, rru, lat_lambda, lon_lambda);
|
||||
highv = _bilinear_interpolate(llv, lrv, rlv, rrv, lat_lambda, lon_lambda);
|
||||
|
||||
umean += llu + lru + rlu + rru;
|
||||
vmean += llv + lrv + rlv + rrv;
|
||||
usqmean += llu*llu + lru*lru + rlu*rlu + rru*rru;
|
||||
vsqmean += llv*llv + lrv*lrv + rlv*rlv + rrv*rrv;
|
||||
|
||||
/*
|
||||
highusq = _bilinear_interpolate(llu*llu, lru*lru, rlu*rlu, rru*rru,
|
||||
lat_lambda, lon_lambda);
|
||||
highvsq = _bilinear_interpolate(llv*llv, lrv*lrv, rlv*rlv, rrv*rrv,
|
||||
lat_lambda, lon_lambda);
|
||||
*/
|
||||
|
||||
*windu = _lerp(lowu, highu, pr_lambda);
|
||||
*windv = _lerp(lowv, highv, pr_lambda);
|
||||
|
||||
// We will calculate the variance by making use of the fact
|
||||
// that the lerping is effectively a weighted mean or
|
||||
// expectation and that
|
||||
// var = E[X^2] - E[X]^2.
|
||||
//
|
||||
// In effect this calculates the instantaneous variance by considering the
|
||||
// contributions from the cube surrounding the point in question.
|
||||
// This is highly cunning and, on the face of it, not entirely wrong.
|
||||
|
||||
umean *= 0.125f; usqmean *= 0.125f;
|
||||
vmean *= 0.125f; vsqmean *= 0.125f;
|
||||
|
||||
*uvar = usqmean - umean * umean;
|
||||
*vvar = vsqmean - vmean * vmean;
|
||||
}
|
||||
}
|
||||
|
||||
// Data for God's own editor.
|
||||
// vim:sw=8:ts=8:et:cindent
|
||||
|
|
@ -0,0 +1,48 @@
|
|||
// --------------------------------------------------------------
|
||||
// CU Spaceflight Landing Prediction
|
||||
// Copyright (c) CU Spaceflight 2009, All Right Reserved
|
||||
//
|
||||
// Written by Rich Wareham <rjw57@cam.ac.uk>
|
||||
//
|
||||
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||||
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
||||
// PARTICULAR PURPOSE.
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#ifndef __WIND_FILE_H__
|
||||
#define __WIND_FILE_H__
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif // __cplusplus
|
||||
|
||||
// An opaque type representing the cache itself.
|
||||
typedef struct wind_file_s wind_file_t;
|
||||
|
||||
// An opaque type representing a cache entry.
|
||||
typedef struct wind_file_entry_s wind_file_entry_t;
|
||||
|
||||
// Open 'file' and parse contents. Return NULL on failure.
|
||||
wind_file_t *wind_file_new (const char *file);
|
||||
|
||||
// Free resources associated with 'file'.
|
||||
void wind_file_free (wind_file_t *file);
|
||||
|
||||
void wind_file_get_wind (wind_file_t *file,
|
||||
float lat,
|
||||
float lon,
|
||||
float height,
|
||||
float *windu,
|
||||
float *windv,
|
||||
float *windusq,
|
||||
float *windvsq);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif // __cplusplus
|
||||
|
||||
#endif // __WIND_FILE_H__
|
||||
|
||||
// Data for God's own editor.
|
||||
// vim:sw=8:ts=8:et:cindent
|
||||
|
|
@ -0,0 +1,357 @@
|
|||
// --------------------------------------------------------------
|
||||
// CU Spaceflight Landing Prediction
|
||||
// Copyright (c) CU Spaceflight 2009, All Right Reserved
|
||||
//
|
||||
// Written by Rich Wareham <rjw57@cam.ac.uk>
|
||||
//
|
||||
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||||
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
||||
// PARTICULAR PURPOSE.
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#include "wind_file_cache.h"
|
||||
#include "wind_file.h"
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#include <assert.h>
|
||||
#include <dirent.h>
|
||||
#include <errno.h>
|
||||
#include <string.h>
|
||||
#include <math.h>
|
||||
|
||||
#include "../util/getline.h"
|
||||
|
||||
extern int verbosity;
|
||||
|
||||
struct wind_file_cache_entry_s
|
||||
{
|
||||
char *filepath; // Full path.
|
||||
unsigned long timestamp; // As POSIX timestamp.
|
||||
float lat, lon; // Window centre.
|
||||
float latrad, lonrad; // Window radius.
|
||||
wind_file_t *loaded_file; // Initially NULL.
|
||||
};
|
||||
|
||||
struct wind_file_cache_s
|
||||
{
|
||||
char *directory_name;
|
||||
unsigned int n_entries;
|
||||
struct wind_file_cache_entry_s **entries; // Matching directory entries.
|
||||
};
|
||||
|
||||
// Yuk! Needed to make use of scandir. Gotta love APIs designed in the 80s.
|
||||
static wind_file_cache_t* _scandir_current_cache;
|
||||
|
||||
static int
|
||||
_parse_header(const char* filepath,
|
||||
float *lat, float *latrad,
|
||||
float *lon, float *lonrad,
|
||||
unsigned long* timestamp)
|
||||
{
|
||||
FILE* file;
|
||||
char* line;
|
||||
size_t line_len;
|
||||
|
||||
// Can I open this file?
|
||||
file = fopen(filepath, "r");
|
||||
if(!file) {
|
||||
// No, abort
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Look for first non-comment line.
|
||||
line = NULL;
|
||||
while((getline(&line, &line_len, file) >= 0) && (line[0] == '#'))
|
||||
{
|
||||
// line does not need to be free-ed since getline will realloc
|
||||
// it if it is too small. See getline(3).
|
||||
}
|
||||
|
||||
if(feof(file))
|
||||
{
|
||||
// Got to the end without finding non-comment.
|
||||
free(line);
|
||||
fclose(file);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
// 'line' is first non-comment. Try to parse it.
|
||||
if(5 != sscanf(line, "%f,%f,%f,%f,%ld", lat, latrad, lon, lonrad, timestamp))
|
||||
{
|
||||
// Failed to parse, it is invalid.
|
||||
free(line);
|
||||
fclose(file);
|
||||
return 0;
|
||||
}
|
||||
|
||||
// File seems valid.
|
||||
free(line);
|
||||
fclose(file);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
#ifdef __APPLE__
|
||||
static int
|
||||
_file_filter(struct dirent *entry)
|
||||
#else
|
||||
static int
|
||||
_file_filter(const struct dirent *entry)
|
||||
#endif
|
||||
{
|
||||
int filepath_len;
|
||||
int rv;
|
||||
wind_file_cache_t* self = _scandir_current_cache;
|
||||
char* filepath = NULL;
|
||||
struct stat stat_buf;
|
||||
|
||||
float lat, latrad, lon, lonrad;
|
||||
unsigned long timestamp;
|
||||
|
||||
// This is using sprintf in C99 mode to create a buffer with
|
||||
// the full file path/
|
||||
filepath_len = 1 + snprintf(NULL, 0, "%s/%s", self->directory_name, entry->d_name);
|
||||
filepath = (char*)malloc(filepath_len);
|
||||
snprintf(filepath, filepath_len, "%s/%s", self->directory_name, entry->d_name);
|
||||
|
||||
// Stat the file.
|
||||
rv = stat(filepath, &stat_buf);
|
||||
if(rv < 0)
|
||||
{
|
||||
perror("Error scanning data dir");
|
||||
free(filepath);
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Is this a regular file?
|
||||
if(!S_ISREG(stat_buf.st_mode))
|
||||
{
|
||||
free(filepath);
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Can I parse out the header?
|
||||
if(!_parse_header(filepath, &lat, &latrad, &lon, &lonrad, ×tamp))
|
||||
{
|
||||
free(filepath);
|
||||
return 0;
|
||||
}
|
||||
|
||||
free(filepath);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
wind_file_cache_t*
|
||||
wind_file_cache_new(const char *directory)
|
||||
{
|
||||
wind_file_cache_t* self;
|
||||
int rv, i;
|
||||
struct dirent **dir_entries;
|
||||
|
||||
assert(directory);
|
||||
|
||||
// Allocate memory for ourself
|
||||
self = (wind_file_cache_t*) malloc(sizeof(wind_file_cache_t));
|
||||
self->n_entries = 0;
|
||||
self->directory_name = strdup(directory);
|
||||
|
||||
if(verbosity > 0)
|
||||
fprintf(stderr, "INFO: Scanning directory '%s'.\n", directory);
|
||||
|
||||
// Use scandir scan the directory looking for data files.
|
||||
_scandir_current_cache = self; // ew!
|
||||
rv = scandir(directory, &dir_entries, _file_filter, alphasort);
|
||||
if(rv < 0) {
|
||||
perror(NULL);
|
||||
wind_file_cache_free(self);
|
||||
return NULL;
|
||||
}
|
||||
if(verbosity > 0)
|
||||
fprintf(stderr, "INFO: Found %i data files.\n", rv);
|
||||
self->n_entries = rv;
|
||||
|
||||
self->entries = (struct wind_file_cache_entry_s**)malloc(sizeof(struct wind_file_cache_entry_s*)*self->n_entries);
|
||||
for(i=0; i<self->n_entries; ++i)
|
||||
{
|
||||
struct dirent* entry = dir_entries[i];
|
||||
int filepath_len, parse_rv;
|
||||
char* filepath = NULL;
|
||||
|
||||
// allocate the entry.
|
||||
self->entries[i] = (struct wind_file_cache_entry_s*)malloc(sizeof(struct wind_file_cache_entry_s));
|
||||
|
||||
// This is using sprintf in C99 mode to create a buffer with
|
||||
// the full file path/
|
||||
filepath_len = 1 + snprintf(NULL, 0, "%s/%s", self->directory_name, entry->d_name);
|
||||
filepath = (char*)malloc(filepath_len);
|
||||
snprintf(filepath, filepath_len, "%s/%s", self->directory_name, entry->d_name);
|
||||
|
||||
// Fill in the file path.
|
||||
self->entries[i]->filepath = filepath;
|
||||
|
||||
// Parse the file header
|
||||
parse_rv = _parse_header(filepath,
|
||||
&(self->entries[i]->lat), &(self->entries[i]->latrad),
|
||||
&(self->entries[i]->lon), &(self->entries[i]->lonrad),
|
||||
&(self->entries[i]->timestamp));
|
||||
if(!parse_rv)
|
||||
{
|
||||
fprintf(stderr, "WARN: Hmm... some files appear to have "
|
||||
"changed under me!");
|
||||
}
|
||||
|
||||
if(verbosity > 1) {
|
||||
fprintf(stderr, "INFO: Found %s.\n", filepath);
|
||||
fprintf(stderr, "INFO: - Covers window (lat, long) = "
|
||||
"(%f +/-%f, %f +/-%f).\n",
|
||||
self->entries[i]->lat, self->entries[i]->latrad,
|
||||
self->entries[i]->lon, self->entries[i]->lonrad);
|
||||
}
|
||||
|
||||
// initially, no file is loaded.
|
||||
self->entries[i]->loaded_file = NULL;
|
||||
|
||||
// finished with this entry
|
||||
free(dir_entries[i]);
|
||||
}
|
||||
// finished with the dir entries.
|
||||
free(dir_entries);
|
||||
|
||||
return self;
|
||||
}
|
||||
|
||||
void
|
||||
wind_file_cache_free(wind_file_cache_t *cache)
|
||||
{
|
||||
if(!cache)
|
||||
return;
|
||||
|
||||
free(cache->directory_name);
|
||||
|
||||
if(cache->n_entries > 0)
|
||||
{
|
||||
unsigned int i;
|
||||
for(i=0; i<cache->n_entries; ++i)
|
||||
{
|
||||
free(cache->entries[i]->filepath);
|
||||
free(cache->entries[i]);
|
||||
cache->entries[i] = NULL;
|
||||
}
|
||||
free(cache->entries);
|
||||
}
|
||||
|
||||
free(cache);
|
||||
}
|
||||
|
||||
static float
|
||||
_lon_dist(float a, float b)
|
||||
{
|
||||
float d1 = fabs(a-b);
|
||||
float d2 = 360.f - d1;
|
||||
return (d1 < d2) ? d1 : d2;
|
||||
}
|
||||
|
||||
int
|
||||
wind_file_cache_entry_contains_point(wind_file_cache_entry_t* entry, float lat, float lon)
|
||||
{
|
||||
if(!entry)
|
||||
return 0;
|
||||
|
||||
if(fabs(entry->lat - lat) > entry->latrad)
|
||||
return 0;
|
||||
|
||||
if(_lon_dist(entry->lon, lon) > entry->lonrad)
|
||||
return 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
void
|
||||
wind_file_cache_find_entry(wind_file_cache_t *cache,
|
||||
float lat, float lon, unsigned long timestamp,
|
||||
wind_file_cache_entry_t** earlier,
|
||||
wind_file_cache_entry_t** later)
|
||||
{
|
||||
assert(cache && earlier && later);
|
||||
|
||||
*earlier = *later = NULL;
|
||||
|
||||
// This is the best we can do if we have no entries.
|
||||
if(cache->n_entries == 0)
|
||||
return;
|
||||
|
||||
// Search for earlier and later entries which match
|
||||
unsigned int i;
|
||||
for(i=0; i<cache->n_entries; ++i)
|
||||
{
|
||||
wind_file_cache_entry_t* entry = cache->entries[i];
|
||||
|
||||
if(entry->timestamp <= timestamp) {
|
||||
// This is an earlier entry
|
||||
if(!(*earlier) || (entry->timestamp > (*earlier)->timestamp))
|
||||
{
|
||||
if(wind_file_cache_entry_contains_point(entry,lat,lon))
|
||||
*earlier = entry;
|
||||
}
|
||||
} else {
|
||||
// This is a later entry
|
||||
if(!(*later) || (entry->timestamp < (*later)->timestamp)) {
|
||||
if(wind_file_cache_entry_contains_point(entry,lat,lon))
|
||||
*later = entry;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if(!*earlier) { *earlier = *later; }
|
||||
if(!*later) { *later = *earlier; }
|
||||
|
||||
// If all else fails, just choose the first entry.
|
||||
if(!*earlier) { *earlier = *later = cache->entries[0]; }
|
||||
}
|
||||
|
||||
const char*
|
||||
wind_file_cache_entry_file_path(wind_file_cache_entry_t* entry)
|
||||
{
|
||||
if(!entry)
|
||||
return NULL;
|
||||
return entry->filepath;
|
||||
}
|
||||
|
||||
unsigned int
|
||||
wind_file_cache_entry_timestamp(wind_file_cache_entry_t* entry)
|
||||
{
|
||||
if(!entry)
|
||||
return 0;
|
||||
return entry->timestamp;
|
||||
}
|
||||
|
||||
wind_file_t*
|
||||
wind_file_cache_entry_file(wind_file_cache_entry_t *entry)
|
||||
{
|
||||
const char* filepath;
|
||||
|
||||
if(!entry)
|
||||
return NULL;
|
||||
|
||||
if(entry->loaded_file)
|
||||
return entry->loaded_file;
|
||||
|
||||
filepath = wind_file_cache_entry_file_path(entry);
|
||||
if(!filepath)
|
||||
return NULL;
|
||||
|
||||
entry->loaded_file = wind_file_new(filepath);
|
||||
return entry->loaded_file;
|
||||
}
|
||||
|
||||
// Data for God's own editor.
|
||||
// vim:sw=8:ts=8:et:cindent
|
||||
|
|
@ -0,0 +1,79 @@
|
|||
// --------------------------------------------------------------
|
||||
// CU Spaceflight Landing Prediction
|
||||
// Copyright (c) CU Spaceflight 2009, All Right Reserved
|
||||
//
|
||||
// Written by Rich Wareham <rjw57@cam.ac.uk>
|
||||
//
|
||||
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
||||
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
||||
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
|
||||
// PARTICULAR PURPOSE.
|
||||
// --------------------------------------------------------------
|
||||
|
||||
#ifndef __WIND_FILES_H__
|
||||
#define __WIND_FILES_H__
|
||||
|
||||
#include "wind_file.h"
|
||||
|
||||
// A cache which scans the wind data directory for data files, tries to read
|
||||
// the header and parse out their timestamp and window information. It then
|
||||
// allows one to query for files closest in time and space for a specified
|
||||
// latitude/longitude/time.
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif // __cplusplus
|
||||
|
||||
// An opaque type representing the cache itself.
|
||||
typedef struct wind_file_cache_s wind_file_cache_t;
|
||||
|
||||
// An opaque type representing a cache entry.
|
||||
typedef struct wind_file_cache_entry_s wind_file_cache_entry_t;
|
||||
|
||||
// Scan 'directory' for wind files. Return a new cache.
|
||||
wind_file_cache_t *wind_file_cache_new (const char *directory);
|
||||
|
||||
// Free resources associated with 'cache'.
|
||||
void wind_file_cache_free (wind_file_cache_t *cache);
|
||||
|
||||
// Search for a cache entry closest to the specified lat, lon and time.
|
||||
// *earlier and *later are set to the nearest cache entries which are
|
||||
// (respectively) earlier and later.
|
||||
void wind_file_cache_find_entry
|
||||
(wind_file_cache_t *cache,
|
||||
float lat,
|
||||
float lon,
|
||||
unsigned long timestamp,
|
||||
wind_file_cache_entry_t **earlier,
|
||||
wind_file_cache_entry_t **later);
|
||||
|
||||
// Return non-zero if the cache entry specifies contains the latitude
|
||||
// and longitude.
|
||||
int wind_file_cache_entry_contains_point
|
||||
(wind_file_cache_entry_t *entry,
|
||||
float lat,
|
||||
float lon);
|
||||
|
||||
// Return a string which gives the full path to the wind file
|
||||
// corresponding to 'entry'. This should not be freed since it
|
||||
// is owned by the cache itself.
|
||||
const char* wind_file_cache_entry_file_path
|
||||
(wind_file_cache_entry_t *entry);
|
||||
|
||||
// Return the timestamp of the specified cache entry.
|
||||
unsigned int wind_file_cache_entry_timestamp
|
||||
(wind_file_cache_entry_t *entry);
|
||||
|
||||
// Return the file for of the specified cache entry loading it if
|
||||
// necessary.
|
||||
wind_file_t* wind_file_cache_entry_file
|
||||
(wind_file_cache_entry_t *entry);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif // __cplusplus
|
||||
|
||||
#endif // __WIND_FILES_H__
|
||||
|
||||
// Data for God's own editor.
|
||||
// vim:sw=8:ts=8:et:cindent
|
||||
Ładowanie…
Reference in New Issue