source: regex.c @ 5934b87

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Last change on this file since 5934b87 was 5cbc929, checked in by Anders Kaseorg <andersk@mit.edu>, 12 years ago
Rename owl_regex_free to owl_regex_cleanup. Signed-off-by: Anders Kaseorg <andersk@mit.edu> Reviewed-by: Nelson Elhage <nelhage@mit.edu>
  • Property mode set to 100644
File size: 1.7 KB
Line 
1#include <string.h>
2#include "owl.h"
3
4void owl_regex_init(owl_regex *re)
5{
6  re->negate=0;
7  re->string=NULL;
8}
9
10int owl_regex_create(owl_regex *re, const char *string)
11{
12  int ret;
13  char buff1[LINE];
14  const char *ptr;
15 
16  re->string=owl_strdup(string);
17
18  ptr=string;
19  re->negate=0;
20  if (string[0]=='!') {
21    ptr++;
22    re->negate=1;
23  }
24
25  /* set the regex */
26  ret=regcomp(&(re->re), ptr, REG_EXTENDED|REG_ICASE);
27  if (ret) {
28    regerror(ret, NULL, buff1, LINE);
29    owl_function_makemsg("Error in regular expression: %s", buff1);
30    owl_free(re->string);
31    re->string=NULL;
32    return(-1);
33  }
34
35  return(0);
36}
37
38int owl_regex_create_quoted(owl_regex *re, const char *string)
39{
40  char *quoted;
41 
42  quoted=owl_text_quote(string, OWL_REGEX_QUOTECHARS, OWL_REGEX_QUOTEWITH);
43  owl_regex_create(re, quoted);
44  owl_free(quoted);
45  return(0);
46}
47
48int owl_regex_compare(const owl_regex *re, const char *string, int *start, int *end)
49{
50  int out, ret;
51  regmatch_t match;
52
53  /* if the regex is not set we match */
54  if (!owl_regex_is_set(re)) {
55    return(0);
56  }
57 
58  ret=regexec(&(re->re), string, 1, &match, 0);
59  out=ret;
60  if (re->negate) {
61    out=!out;
62    match.rm_so = 0;
63    match.rm_eo = strlen(string);
64  }
65  if (start != NULL) *start = match.rm_so;
66  if (end != NULL) *end = match.rm_eo;
67  return(out);
68}
69
70int owl_regex_is_set(const owl_regex *re)
71{
72  if (re->string) return(1);
73  return(0);
74}
75
76const char *owl_regex_get_string(const owl_regex *re)
77{
78  return(re->string);
79}
80
81void owl_regex_copy(const owl_regex *a, owl_regex *b)
82{
83  owl_regex_create(b, a->string);
84}
85
86void owl_regex_cleanup(owl_regex *re)
87{
88    if (re->string) {
89        owl_free(re->string);
90        regfree(&(re->re));
91    }
92}
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