kopia lustrzana https://github.com/micropython/micropython
81 wiersze
2.3 KiB
C
81 wiersze
2.3 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include "misc.h"
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#include "lexer.h"
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typedef struct _str_buf_t {
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MP_BOOL free; // free src_beg when done
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const char *src_beg; // beginning of source
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const char *src_cur; // current location in source
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const char *src_end; // end (exclusive) of source
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} str_buf_t;
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unichar str_buf_next_char(str_buf_t *sb) {
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if (sb->src_cur < sb->src_end) {
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return *sb->src_cur++;
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} else {
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return MP_LEXER_CHAR_EOF;
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}
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}
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void str_buf_free(str_buf_t *sb) {
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if (sb) {
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if (sb->free) {
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m_del(char, (char*)sb->src_beg, 0 /* unknown size of src_beg */);
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}
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m_del_obj(str_buf_t, sb);
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}
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}
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mp_lexer_t *mp_lexer_new_from_str_len(const char *src_name, const char *str, uint len, MP_BOOL free_str) {
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str_buf_t *sb = m_new(str_buf_t, 1);
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sb->free = free_str;
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sb->src_beg = str;
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sb->src_cur = str;
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sb->src_end = str + len;
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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);
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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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printf("cannot open file %s\n", filename);
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return NULL;
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}
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uint size = lseek(fd, 0, SEEK_END);
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lseek(fd, 0, SEEK_SET);
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char *data = m_new(char, size);
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int read_size = read(fd, data, size);
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close(fd);
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if (read_size != size) {
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printf("error reading file %s\n", filename);
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m_del(char, data, size);
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return NULL;
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}
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return mp_lexer_new_from_str_len(filename, data, size, MP_TRUE);
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}
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/******************************************************************************/
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/* unix implementation of import */
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// TODO properly!
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static const char *import_base_dir = NULL;
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void mp_import_set_directory(const char *dir) {
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import_base_dir = dir;
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}
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mp_lexer_t *mp_import_open_file(qstr mod_name) {
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vstr_t *vstr = vstr_new();
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if (import_base_dir != NULL) {
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vstr_printf(vstr, "%s/", import_base_dir);
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}
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vstr_printf(vstr, "%s.py", qstr_str(mod_name));
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return mp_lexer_new_from_file(vstr_str(vstr)); // TODO does lexer need to copy the string? can we free it here?
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}
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