kopia lustrzana https://github.com/micropython/micropython
127 wiersze
3.8 KiB
C
127 wiersze
3.8 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include "py/mpstate.h"
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#include "py/mphal.h"
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#include "input.h"
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#if MICROPY_USE_READLINE == 1
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#include "shared/readline/readline.h"
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#endif
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#if MICROPY_USE_READLINE == 0
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char *prompt(char *p) {
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// simple read string
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static char buf[256];
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fputs(p, stdout);
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fflush(stdout);
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char *s = fgets(buf, sizeof(buf), stdin);
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if (!s) {
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return NULL;
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}
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int l = strlen(buf);
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if (buf[l - 1] == '\n') {
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buf[l - 1] = 0;
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} else {
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l++;
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}
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char *line = malloc(l);
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memcpy(line, buf, l);
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return line;
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}
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#endif
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void prompt_read_history(void) {
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#if MICROPY_USE_READLINE_HISTORY
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#if MICROPY_USE_READLINE == 1
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readline_init0(); // will clear history pointers
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char *home = getenv("HOME");
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if (home != NULL) {
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vstr_t vstr;
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vstr_init(&vstr, 50);
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vstr_printf(&vstr, "%s/.micropython.history", home);
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int fd = open(vstr_null_terminated_str(&vstr), O_RDONLY);
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if (fd != -1) {
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vstr_reset(&vstr);
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for (;;) {
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char c;
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int sz = read(fd, &c, 1);
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if (sz < 0) {
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if (errno == EINTR) {
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continue;
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}
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break;
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}
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if (sz == 0 || c == '\n') {
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readline_push_history(vstr_null_terminated_str(&vstr));
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if (sz == 0) {
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break;
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}
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vstr_reset(&vstr);
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} else {
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vstr_add_byte(&vstr, c);
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}
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}
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close(fd);
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}
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vstr_clear(&vstr);
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}
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#endif
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#endif
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}
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void prompt_write_history(void) {
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#if MICROPY_USE_READLINE_HISTORY
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#if MICROPY_USE_READLINE == 1
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char *home = getenv("HOME");
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if (home != NULL) {
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vstr_t vstr;
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vstr_init(&vstr, 50);
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vstr_printf(&vstr, "%s/.micropython.history", home);
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int fd = open(vstr_null_terminated_str(&vstr), O_CREAT | O_TRUNC | O_WRONLY, 0644);
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if (fd != -1) {
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for (int i = MP_ARRAY_SIZE(MP_STATE_PORT(readline_hist)) - 1; i >= 0; i--) {
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const char *line = MP_STATE_PORT(readline_hist)[i];
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if (line != NULL) {
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while (write(fd, line, strlen(line)) == -1 && errno == EINTR) {
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}
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while (write(fd, "\n", 1) == -1 && errno == EINTR) {
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}
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}
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}
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close(fd);
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}
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}
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#endif
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#endif
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}
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