56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "misc.h"
|
|
#include "lexer.h"
|
|
|
|
typedef struct _str_buf_t {
|
|
bool free; // free src_beg when done
|
|
const char *src_beg; // beginning of source
|
|
const char *src_cur; // current location in source
|
|
const char *src_end; // end (exclusive) of source
|
|
} str_buf_t;
|
|
|
|
unichar str_buf_next_char(str_buf_t *sb) {
|
|
if (sb->src_cur < sb->src_end) {
|
|
return *sb->src_cur++;
|
|
} else {
|
|
return PY_LEXER_CHAR_EOF;
|
|
}
|
|
}
|
|
|
|
void str_buf_free(str_buf_t *sb) {
|
|
if (sb) {
|
|
if (sb->free) {
|
|
m_free((char*)sb->src_beg);
|
|
}
|
|
m_free(sb);
|
|
}
|
|
}
|
|
|
|
py_lexer_t *py_lexer_new_from_str_len(const char *src_name, const char *str, uint len, bool free_str) {
|
|
str_buf_t *sb = m_new(str_buf_t, 1);
|
|
sb->free = free_str;
|
|
sb->src_beg = str;
|
|
sb->src_cur = str;
|
|
sb->src_end = str + len;
|
|
return py_lexer_new(src_name, sb, (py_lexer_stream_next_char_t)str_buf_next_char, (py_lexer_stream_free_t)str_buf_free);
|
|
}
|
|
|
|
py_lexer_t *py_lexer_new_from_file(const char *filename) {
|
|
int fd = open(filename, O_RDONLY);
|
|
if (fd < 0) {
|
|
printf("cannot open file %s\n", filename);
|
|
return NULL;
|
|
}
|
|
uint size = lseek(fd, 0, SEEK_END);
|
|
lseek(fd, 0, SEEK_SET);
|
|
char *data = m_new(char, size);
|
|
read(fd, data, size);
|
|
close(fd);
|
|
|
|
return py_lexer_new_from_str_len(filename, data, size, true);
|
|
}
|