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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* 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.
*/
#include "py/mpconfig.h"
#if MICROPY_HELPER_LEXER_UNIX
#include <stdio.h>
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "py/lexer.h"
typedef struct _mp_lexer_file_buf_t {
int fd;
bool close_fd;
byte buf[20];
mp_uint_t len;
mp_uint_t pos;
} mp_lexer_file_buf_t;
STATIC mp_uint_t file_buf_next_byte(mp_lexer_file_buf_t *fb) {
if (fb->pos >= fb->len) {
if (fb->len == 0) {
return MP_LEXER_EOF;
} else {
int n = read(fb->fd, fb->buf, sizeof(fb->buf));
if (n <= 0) {
fb->len = 0;
return MP_LEXER_EOF;
}
fb->len = n;
fb->pos = 0;
}
}
return fb->buf[fb->pos++];
}
STATIC void file_buf_close(mp_lexer_file_buf_t *fb) {
if (fb->close_fd) {
close(fb->fd);
}
m_del_obj(mp_lexer_file_buf_t, fb);
}
mp_lexer_t *mp_lexer_new_from_fd(qstr filename, int fd, bool close_fd) {
mp_lexer_file_buf_t *fb = m_new_obj_maybe(mp_lexer_file_buf_t);
if (fb == NULL) {
if (close_fd) {
close(fd);
}
return NULL;
}
fb->fd = fd;
fb->close_fd = close_fd;
int n = read(fb->fd, fb->buf, sizeof(fb->buf));
fb->len = n;
fb->pos = 0;
return mp_lexer_new(filename, fb, (mp_lexer_stream_next_byte_t)file_buf_next_byte, (mp_lexer_stream_close_t)file_buf_close);
}
mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
int fd = open(filename, O_RDONLY);
if (fd < 0) {
return NULL;
}
return mp_lexer_new_from_fd(qstr_from_str(filename), fd, true);
}
#endif // MICROPY_HELPER_LEXER_UNIX