kopia lustrzana https://github.com/micropython/micropython
97 wiersze
2.9 KiB
C
97 wiersze
2.9 KiB
C
/*
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* This file is part of the Micro Python 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 "py/mpconfig.h"
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#if MICROPY_HELPER_LEXER_UNIX
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include "py/lexer.h"
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typedef struct _mp_lexer_file_buf_t {
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int fd;
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bool close_fd;
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byte buf[20];
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mp_uint_t len;
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mp_uint_t pos;
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} mp_lexer_file_buf_t;
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STATIC mp_uint_t file_buf_next_byte(mp_lexer_file_buf_t *fb) {
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if (fb->pos >= fb->len) {
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if (fb->len == 0) {
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return MP_LEXER_EOF;
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} else {
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int n = read(fb->fd, fb->buf, sizeof(fb->buf));
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if (n <= 0) {
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fb->len = 0;
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return MP_LEXER_EOF;
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}
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fb->len = n;
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fb->pos = 0;
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}
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}
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return fb->buf[fb->pos++];
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}
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STATIC void file_buf_close(mp_lexer_file_buf_t *fb) {
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if (fb->close_fd) {
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close(fb->fd);
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}
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m_del_obj(mp_lexer_file_buf_t, fb);
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}
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mp_lexer_t *mp_lexer_new_from_fd(qstr filename, int fd, bool close_fd) {
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mp_lexer_file_buf_t *fb = m_new_obj_maybe(mp_lexer_file_buf_t);
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if (fb == NULL) {
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if (close_fd) {
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close(fd);
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}
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return NULL;
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}
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fb->fd = fd;
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fb->close_fd = close_fd;
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int n = read(fb->fd, fb->buf, sizeof(fb->buf));
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fb->len = n;
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fb->pos = 0;
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return mp_lexer_new(filename, fb, (mp_lexer_stream_next_byte_t)file_buf_next_byte, (mp_lexer_stream_close_t)file_buf_close);
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}
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mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
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int fd = open(filename, O_RDONLY);
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if (fd < 0) {
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return NULL;
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}
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return mp_lexer_new_from_fd(qstr_from_str(filename), fd, true);
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}
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#endif // MICROPY_HELPER_LEXER_UNIX
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