11  * Routines to do pattern matching.
21  * Compile a search pattern, for future use by match_pattern.
23 static int compile_pattern2(constant char *pattern, int search_type, PATTERN_TYPE *comp_pattern, in…  in compile_pattern2()  argument
32 	if (re_compile_pattern(pattern, strlen(pattern), comp))  in compile_pattern2()
36 			error("Invalid pattern", NULL_PARG);  in compile_pattern2()
48 	if (regcomp(comp, pattern, REGCOMP_FLAG | (is_caseless ? REG_ICASE : 0)))  in compile_pattern2()
52 			error("Invalid pattern", NULL_PARG);  in compile_pattern2()
66 	pcre *comp = pcre_compile(pattern,  in compile_pattern2()
83 	pcre2_code *comp = pcre2_compile((PCRE2_SPTR)pattern, strlen(pattern),  in compile_pattern2()
102 	if ((parg.p_string = re_comp(pattern)) != NULL)  in compile_pattern2()
112 	if ((comp = regcmp(pattern, 0)) == NULL)  in compile_pattern2()
115 			error("Invalid pattern", NULL_PARG);  in compile_pattern2()
125 	comp = regcomp(pattern);  in compile_pattern2()
144  * Like compile_pattern2, but convert the pattern to lowercase if necessary.
146 public int compile_pattern(constant char *pattern, int search_type, int show_error, PATTERN_TYPE *c…  in compile_pattern()  argument
152 		result = compile_pattern2(pattern, search_type, comp_pattern, show_error);  in compile_pattern()
155 		char *cvt_pattern = (char*) ecalloc(1, cvt_length(strlen(pattern), CVT_TO_LC));  in compile_pattern()
156 		cvt_text(cvt_pattern, pattern, NULL, NULL, CVT_TO_LC);  in compile_pattern()
164  * Forget that we have a compiled pattern.
166 public void uncompile_pattern(PATTERN_TYPE *pattern)  in uncompile_pattern()  argument
169 	if (*pattern != NULL)  in uncompile_pattern()
171 		regfree(*pattern);  in uncompile_pattern()
172 		free(*pattern);  in uncompile_pattern()
174 	*pattern = NULL;  in uncompile_pattern()
177 	if (*pattern != NULL)  in uncompile_pattern()
179 		regfree(*pattern);  in uncompile_pattern()
180 		free(*pattern);  in uncompile_pattern()
182 	*pattern = NULL;  in uncompile_pattern()
185 	if (*pattern != NULL)  in uncompile_pattern()
186 		pcre_free(*pattern);  in uncompile_pattern()
187 	*pattern = NULL;  in uncompile_pattern()
190 	if (*pattern != NULL)  in uncompile_pattern()
191 		pcre2_code_free(*pattern);  in uncompile_pattern()
192 	*pattern = NULL;  in uncompile_pattern()
195 	*pattern = 0;  in uncompile_pattern()
198 	if (*pattern != NULL)  in uncompile_pattern()
199 		free(*pattern);  in uncompile_pattern()
200 	*pattern = NULL;  in uncompile_pattern()
203 	if (*pattern != NULL)  in uncompile_pattern()
204 		free(*pattern);  in uncompile_pattern()
205 	*pattern = NULL;  in uncompile_pattern()
211  * Can a pattern be successfully compiled?
213 public int valid_pattern(char *pattern)
219 	result = compile_pattern2(pattern, 0, &comp_pattern, 0);
228  * Is a compiled pattern null?
230 public lbool is_null_pattern(PATTERN_TYPE pattern)  in is_null_pattern()  argument
233 	return (pattern == NULL);  in is_null_pattern()
236 	return (pattern == NULL);  in is_null_pattern()
239 	return (pattern == NULL);  in is_null_pattern()
242 	return (pattern == NULL);  in is_null_pattern()
245 	return (pattern == 0);  in is_null_pattern()
248 	return (pattern == NULL);  in is_null_pattern()
251 	return (pattern == NULL);  in is_null_pattern()
254 	return (pattern == NULL);  in is_null_pattern()
258  * Simple pattern matching function.
261 static int match(constant char *pattern, size_t pattern_len, constant char *buf, int buf_len, const…  in match()  argument
265 	constant char *pattern_end = pattern + pattern_len;  in match()
271 		for (pp = pattern, lp = buf;  ;  pp++, lp++)  in match()
294  * Perform a pattern match with the previously compiled pattern.
299 static lbool match_pattern1(PATTERN_TYPE pattern, constant char *tpattern, constant char *line, siz…  in match_pattern1()  argument
314 		pattern->not_bol = notbol;  in match_pattern1()
315 		pattern->regs_allocated = REGS_UNALLOCATED;  in match_pattern1()
316 		matched = re_search(pattern, line, line_len, line_off, line_len - line_off, &search_regs) >= 0;  in match_pattern1()
336 		matched = !regexec(pattern, line, RM_COUNT, rm, flags);  in match_pattern1()
372 		int mcount = pcre_exec(pattern, NULL, line, line_len,  in match_pattern1()
395 		int mcount = pcre2_match(pattern, (PCRE2_SPTR)line, line_len,  in match_pattern1()
427 	matched = ((*ep++ = regex(pattern, line + line_off)) != NULL);  in match_pattern1()
433 	matched = regexec2(pattern, line + line_off, notbol);  in match_pattern1()
435 	matched = regexec(pattern, line + line_off);  in match_pattern1()
439 		*sp++ = pattern->startp[0];  in match_pattern1()
440 		*ep++ = pattern->endp[0];  in match_pattern1()
464 public lbool match_pattern(PATTERN_TYPE pattern, constant char *tpattern, constant char *line, size…  in match_pattern()  argument
469 …lbool matched = match_pattern1(pattern, tpattern, line, line_len, line_off, sp, ep, nsp, notbol, s…  in match_pattern()
485  * Return the name of the pattern matching library.