81 lines
2.3 KiB
C
81 lines
2.3 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 MP_LEXER_CHAR_EOF;
|
|
}
|
|
}
|
|
|
|
void str_buf_free(str_buf_t *sb) {
|
|
if (sb) {
|
|
if (sb->free) {
|
|
m_del(char, (char*)sb->src_beg, 0 /* unknown size of src_beg */);
|
|
}
|
|
m_del_obj(str_buf_t, sb);
|
|
}
|
|
}
|
|
|
|
mp_lexer_t *mp_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 mp_lexer_new(src_name, sb, (mp_lexer_stream_next_char_t)str_buf_next_char, (mp_lexer_stream_close_t)str_buf_free);
|
|
}
|
|
|
|
mp_lexer_t *mp_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);
|
|
int read_size = read(fd, data, size);
|
|
close(fd);
|
|
if (read_size != size) {
|
|
printf("error reading file %s\n", filename);
|
|
m_del(char, data, size);
|
|
return NULL;
|
|
}
|
|
|
|
return mp_lexer_new_from_str_len(filename, data, size, true);
|
|
}
|
|
|
|
/******************************************************************************/
|
|
/* unix implementation of import */
|
|
|
|
// TODO properly!
|
|
|
|
static const char *import_base_dir = NULL;
|
|
|
|
void mp_import_set_directory(const char *dir) {
|
|
import_base_dir = dir;
|
|
}
|
|
|
|
mp_lexer_t *mp_import_open_file(qstr mod_name) {
|
|
vstr_t *vstr = vstr_new();
|
|
if (import_base_dir != NULL) {
|
|
vstr_printf(vstr, "%s/", import_base_dir);
|
|
}
|
|
vstr_printf(vstr, "%s.py", qstr_str(mod_name));
|
|
return mp_lexer_new_from_file(vstr_str(vstr)); // TODO does lexer need to copy the string? can we free it here?
|
|
}
|