13  * expression back-end when we started supporting PCRE2. regex.h defines a
46 struct spec {  struct
55 	int stem_id;		/* indicates which stem-compression item */
56 	char hasMetaChars;	/* regular expression has meta-chars */
57 	char from_mmap;		/* this spec is from an mmap of the data */  argument
83 	struct spec *spec_arr;
102 	if (mode[0] != '-' || mode[1] == '\0' || mode[2] != '\0')  in string_to_mode()
103 		return (mode_t)-1;  in string_to_mode()
117 	case '-':  in string_to_mode()
120 		return (mode_t)-1;  in string_to_mode()
126 	struct spec *specs;  in grow_specs()
129 	if (data->nspec < data->alloc_specs)  in grow_specs()
132 	new_specs = data->nspec + 16;  in grow_specs()
133 	total_specs = data->nspec + new_specs;  in grow_specs()
135 	specs = realloc(data->spec_arr, total_specs * sizeof(*specs));  in grow_specs()
138 		return -1;  in grow_specs()
142 	memset(&specs[data->nspec], 0, new_specs * sizeof(*specs));  in grow_specs()
144 	data->spec_arr = specs;  in grow_specs()
145 	data->alloc_specs = total_specs;  in grow_specs()
149 /* Determine if the regular expression specification has any meta characters. */
150 static inline void spec_hasMetaChars(struct spec *spec)  in spec_hasMetaChars()  argument
156 	c = spec->regex_str;  in spec_hasMetaChars()
157 	len = strlen(spec->regex_str);  in spec_hasMetaChars()
160 	spec->hasMetaChars = 0;  in spec_hasMetaChars()
161 	spec->prefix_len = len;  in spec_hasMetaChars()
164 	 * meta character. Return when any meta character reached. */  in spec_hasMetaChars()
177 			spec->hasMetaChars = 1;  in spec_hasMetaChars()
178 			spec->prefix_len = c - spec->regex_str;  in spec_hasMetaChars()
194 	struct spec *spec_copy;  in sort_specs()
195 	struct spec spec;  in sort_specs()  local
200 	spec_copy = malloc(len * data->nspec);  in sort_specs()
202 		return -1;  in sort_specs()
206 	back = data->nspec - 1;  in sort_specs()
207 	for (i = 0; i < data->nspec; i++) {  in sort_specs()
208 		if (data->spec_arr[i].hasMetaChars)  in sort_specs()
209 			memcpy(&spec_copy[front++], &data->spec_arr[i], len);  in sort_specs()
211 			memcpy(&spec_copy[back--], &data->spec_arr[i], len);  in sort_specs()
219 	back = data->nspec - 1;  in sort_specs()
222 		memcpy(&spec, &spec_copy[front], len);  in sort_specs()
226 		memcpy(&spec_copy[back], &spec, len);  in sort_specs()
228 		back--;  in sort_specs()
231 	free(data->spec_arr);  in sort_specs()
232 	data->spec_arr = spec_copy;  in sort_specs()
251 	return tmp - buf;  in get_stem_from_spec()
262 	for (i = 0; i < data->num_stems; i++) {  in find_stem()
263 		if (stem_len == data->stem_arr[i].len &&  in find_stem()
264 		    !strncmp(buf, data->stem_arr[i].buf, stem_len))  in find_stem()
268 	return -1;  in find_stem()
274 	int num = data->num_stems;  in store_stem()
276 	if (data->alloc_stems == num) {  in store_stem()
278 		int alloc_stems = data->alloc_stems * 2 + 16;  in store_stem()
279 		tmp_arr = realloc(data->stem_arr,  in store_stem()
282 			return -1;  in store_stem()
284 		data->alloc_stems = alloc_stems;  in store_stem()
285 		data->stem_arr = tmp_arr;  in store_stem()
287 	data->stem_arr[num].len = stem_len;  in store_stem()
288 	data->stem_arr[num].buf = buf;  in store_stem()
289 	data->stem_arr[num].from_mmap = 0;  in store_stem()
290 	data->num_stems++;  in store_stem()
295 /* find the stem of a file spec, returns the index into stem_arr for a new
296  * or existing stem, (or -1 if there is no possible stem - IE for a file in
306 		return -1;  in find_stem_from_spec()
315 		return -1;  in find_stem_from_spec()
324 /* This will always check for buffer over-runs and either read the next entry
329 	if (bytes > fp->next_len)  in next_entry()
330 		return -1;  in next_entry()
333 		memcpy(buf, fp->next_addr, bytes);  in next_entry()
335 	fp->next_addr = (char *)fp->next_addr + bytes;  in next_entry()
336 	fp->next_len -= bytes;  in next_entry()
340 static inline int compile_regex(struct spec *spec, const char **errbuf)  in compile_regex()  argument
355 		__atomic_load_n(&spec->regex_compiled, __ATOMIC_ACQUIRE);  in compile_regex()
359 	regex_compiled = spec->regex_compiled;  in compile_regex()
365 	__pthread_mutex_lock(&spec->regex_lock);  in compile_regex()
370 		__atomic_load_n(&spec->regex_compiled, __ATOMIC_ACQUIRE);  in compile_regex()
374 	regex_compiled = spec->regex_compiled;  in compile_regex()
377 		__pthread_mutex_unlock(&spec->regex_lock);  in compile_regex()
381 	reg_buf = spec->regex_str;  in compile_regex()
388 		__pthread_mutex_unlock(&spec->regex_lock);  in compile_regex()
389 		return -1;  in compile_regex()
400 	rc = regex_prepare_data(&spec->regex, anchored_regex, &error_data);  in compile_regex()
409 		__pthread_mutex_unlock(&spec->regex_lock);  in compile_regex()
411 		return -1;  in compile_regex()
416 	__atomic_store_n(&spec->regex_compiled, true, __ATOMIC_RELEASE);  in compile_regex()
419 	spec->regex_compiled = true;  in compile_regex()
422 	__pthread_mutex_unlock(&spec->regex_lock);  in compile_regex()
434 	struct saved_data *data = (struct saved_data *)rec->data;  in process_line()
435 	struct spec *spec_arr;  in process_line()
436 	unsigned int nspec = data->nspec;  in process_line()
453 		return -1;  in process_line()
466 		return -1;  in process_line()
486 	spec_arr = data->spec_arr;  in process_line()
488 	/* process and store the specification in spec. */  in process_line()
501 	 * bump data->nspecs to cause closef() to cover it in its free  in process_line()
504 	data->nspec++;  in process_line()
506 	if (rec->validating  in process_line()
512 		return -1;  in process_line()
518 		if (mode == (mode_t)-1) {  in process_line()
523 			return -1;  in process_line()
529 	 * any meta characters in the RE */  in process_line()
532 	if (strcmp(context, "<<none>>") && rec->validating)  in process_line()