mangareader/manga.c

155 lines
4.7 KiB
C

#include <libsoup/soup.h>
#ifndef PCRE2_CODE_UNIT_WIDTH
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>
#endif
#include <manga.h>
// TODO: Split this file and delete it.
static void
iterate_string_to_split(struct SplittedString *splitted_string,
pcre2_code *re, int *will_break, const char *subject,
size_t subject_size, size_t *start_pos, size_t *offset);
void
copy_substring(const char *origin, char *dest, size_t dest_len, size_t start,
size_t len) {
size_t copying_offset = 0;
while (copying_offset < len) {
if (!(start+copying_offset <=dest_len)) {
fprintf(stderr, "Read attempt out of bounds.%ld %ld %ld\n", dest_len, start, len);
break;
}
dest[copying_offset] = origin[start+copying_offset];
copying_offset++;
}
dest[len] = '\0';
}
struct SplittedString *
split(char *re_str, size_t re_str_size, const char *subject, size_t subject_size) {
pcre2_code_8 *re;
size_t start_pos = 0;
size_t offset = 0;
int regex_compile_error;
PCRE2_SIZE error_offset;
struct SplittedString *splitted_string;
splitted_string = g_malloc (sizeof *splitted_string);
splitted_string->n_strings = 0;
splitted_string->substrings = NULL;
re = pcre2_compile ((PCRE2_SPTR8) re_str,
re_str_size, 0, &regex_compile_error, &error_offset, NULL);
while (start_pos < subject_size) {
int will_break = 0;
iterate_string_to_split(splitted_string, re, &will_break,
subject, subject_size, &start_pos, &offset);
if (will_break) {
break;
}
}
pcre2_code_free (re);
re = NULL;
return splitted_string;
}
char *
alloc_string(size_t len) {
char * return_value = NULL;
return g_malloc (len + 1 * sizeof *return_value);
}
void
splitted_string_free (struct SplittedString *splitted_string) {
for (int i = 0; i<splitted_string->n_strings; i++) {
g_free (splitted_string->substrings[i].content);
}
g_free (splitted_string->substrings);
g_free (splitted_string);
}
static void
iterate_string_to_split(struct SplittedString *splitted_string, pcre2_code *re, int *will_break, const char *subject,
size_t subject_size, size_t *start_pos, size_t *offset) {
pcre2_match_data_8 *match_data;
PCRE2_SIZE *ovector;
int rc;
splitted_string->n_strings++;
match_data = pcre2_match_data_create_from_pattern_8 (re, NULL);
rc = pcre2_match ( re, (PCRE2_SPTR8) subject, subject_size, *start_pos, 0, match_data,
NULL);
if (splitted_string->substrings) {
splitted_string->substrings = g_realloc (splitted_string->substrings,
(sizeof *splitted_string->substrings) * (*offset + 1));
} else {
splitted_string->substrings = g_malloc (sizeof *splitted_string->substrings);
}
if (rc < 0) {
struct String *current_substring =
&splitted_string->substrings [*offset];
current_substring->content = alloc_string (subject_size
- *start_pos);
copy_substring (subject, current_substring->content,
subject_size,
*start_pos,
subject_size - *start_pos);
current_substring->size = subject_size - *start_pos;
*will_break = 1;
goto cleanup_iterate_string_to_split;
}
ovector = pcre2_get_ovector_pointer_8(match_data);
splitted_string->substrings[*offset].content = alloc_string (
ovector[0] - *start_pos);
copy_substring (subject, splitted_string->substrings[*offset]
.content,
subject_size,
*start_pos,
ovector[0] - *start_pos);
splitted_string->substrings[*offset].size =
ovector[0] - *start_pos;
*start_pos = ovector[1];
*offset += 1;
cleanup_iterate_string_to_split:
pcre2_match_data_free (match_data);
}
char *
match_1 (char *re_str, char *subject) {
pcre2_code *re;
pcre2_match_data *match_data;
char *return_value;
int regex_compile_error;
int rc;
size_t len_match = 0;
return_value = NULL;
PCRE2_SIZE error_offset;
re = pcre2_compile ((PCRE2_SPTR8) re_str, strlen (re_str), 0,
&regex_compile_error, &error_offset, NULL);
match_data = pcre2_match_data_create_from_pattern (re, NULL);
if (!subject) {
goto cleanup_match;
}
rc = pcre2_match (re, (PCRE2_SPTR8) subject, strlen (subject),
0, 0, match_data, NULL);
if (rc < 0 ) {
goto cleanup_match;
}
pcre2_substring_get_bynumber (match_data, 1, (PCRE2_UCHAR8**)
&return_value, &len_match);
cleanup_match:
pcre2_match_data_free (match_data);
pcre2_code_free (re);
return return_value;
}