source: regex.c @ 601733d

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Last change on this file since 601733d was 8b7466b, checked in by Nelson Elhage <nelhage@mit.edu>, 14 years ago
deleting a superfluous comment
  • Property mode set to 100644
File size: 1.6 KB
Line 
1#include <string.h>
2#include "owl.h"
3
4static const char fileIdent[] = "$Id$";
5
6void owl_regex_init(owl_regex *re)
7{
8  re->negate=0;
9  re->string=NULL;
10}
11
12int owl_regex_create(owl_regex *re, char *string)
13{
14  int ret;
15  char buff1[LINE], buff2[LINE];
16  char *ptr;
17 
18  re->string=owl_strdup(string);
19
20  ptr=string;
21  re->negate=0;
22  if (string[0]=='!') {
23    ptr++;
24    re->negate=1;
25  }
26
27  /* set the regex */
28  ret=regcomp(&(re->re), ptr, REG_EXTENDED|REG_ICASE);
29  if (ret) {
30    regerror(ret, NULL, buff1, LINE);
31    sprintf(buff2, "Error in regular expression: %s", buff1);
32    owl_function_makemsg(buff2);
33    owl_free(re->string);
34    re->string=NULL;
35    return(-1);
36  }
37
38  return(0);
39}
40
41int owl_regex_create_quoted(owl_regex *re, char *string)
42{
43  char *quoted;
44 
45  quoted=owl_text_quote(string, OWL_REGEX_QUOTECHARS, OWL_REGEX_QUOTEWITH);
46  owl_regex_create(re, quoted);
47  owl_free(quoted);
48  return(0);
49}
50
51int owl_regex_compare(owl_regex *re, char *string)
52{
53  int out, ret;
54
55  /* if the regex is not set we match */
56  if (!owl_regex_is_set(re)) {
57    return(0);
58  }
59 
60  ret=regexec(&(re->re), string, 0, NULL, 0);
61  out=ret;
62  if (re->negate) {
63    out=!out;
64  }
65  return(out);
66}
67
68int owl_regex_is_set(owl_regex *re)
69{
70  if (re->string) return(1);
71  return(0);
72}
73
74char *owl_regex_get_string(owl_regex *re)
75{
76  return(re->string);
77}
78
79void owl_regex_copy(owl_regex *a, owl_regex *b)
80{
81  b->negate=a->negate;
82  b->string=owl_strdup(a->string);
83  memcpy(&(b->re), &(a->re), sizeof(regex_t));
84}
85
86void owl_regex_free(owl_regex *re)
87{
88    if (re->string) {
89        owl_free(re->string);
90        regfree(&(re->re));
91    }
92}
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