1 /*
2 * listcap.c
3 *
4 * capture history (?@...) sample.
5 */
6 #include <stdio.h>
7 #include <string.h>
8 #include "oniguruma.h"
9
10 static int
node_callback(int group,int beg,int end,int level,int at,void * arg)11 node_callback(int group, int beg, int end, int level, int at, void* arg)
12 {
13 int i;
14
15 if (at != ONIG_TRAVERSE_CALLBACK_AT_FIRST)
16 return -1; /* error */
17
18 /* indent */
19 for (i = 0; i < level * 2; i++)
20 fputc(' ', stderr);
21
22 fprintf(stderr, "%d: (%d-%d)\n", group, beg, end);
23 return 0;
24 }
25
ex(unsigned char * str,unsigned char * pattern,OnigSyntaxType * syntax,OnigOptionType options)26 extern int ex(unsigned char* str, unsigned char* pattern,
27 OnigSyntaxType* syntax, OnigOptionType options)
28 {
29 int r;
30 unsigned char *start, *range, *end;
31 regex_t* reg;
32 OnigErrorInfo einfo;
33 OnigRegion *region;
34
35 r = onig_new(®, pattern, pattern + strlen((char* )pattern),
36 options, ONIG_ENCODING_ASCII, syntax, &einfo);
37 if (r != ONIG_NORMAL) {
38 char s[ONIG_MAX_ERROR_MESSAGE_LEN];
39 onig_error_code_to_str((UChar* )s, r, &einfo);
40 fprintf(stderr, "ERROR: %s\n", s);
41 return -1;
42 }
43
44 fprintf(stderr, "number of captures: %d\n", onig_number_of_captures(reg));
45 fprintf(stderr, "number of capture histories: %d\n",
46 onig_number_of_capture_histories(reg));
47
48 region = onig_region_new();
49
50 end = str + strlen((char* )str);
51 start = str;
52 range = end;
53 r = onig_search(reg, str, end, start, range, region, ONIG_OPTION_NONE);
54 if (r >= 0) {
55 int i;
56
57 fprintf(stderr, "match at %d\n", r);
58 for (i = 0; i < region->num_regs; i++) {
59 fprintf(stderr, "%d: (%d-%d)\n", i, region->beg[i], region->end[i]);
60 }
61 fprintf(stderr, "\n");
62
63 r = onig_capture_tree_traverse(region, ONIG_TRAVERSE_CALLBACK_AT_FIRST,
64 node_callback, (void* )0);
65 }
66 else if (r == ONIG_MISMATCH) {
67 fprintf(stderr, "search fail\n");
68 }
69 else { /* error */
70 char s[ONIG_MAX_ERROR_MESSAGE_LEN];
71 onig_error_code_to_str((UChar* )s, r);
72 onig_region_free(region, 1 /* 1:free self, 0:free contents only */);
73 onig_free(reg);
74 return -1;
75 }
76
77 onig_region_free(region, 1 /* 1:free self, 0:free contents only */);
78 onig_free(reg);
79 return 0;
80 }
81
82
main(int argc,char * argv[])83 extern int main(int argc, char* argv[])
84 {
85 int r;
86 OnigSyntaxType syn;
87 OnigEncoding use_encs[1];
88
89 static UChar* str1 = (UChar* )"((())())";
90 static UChar* pattern1
91 = (UChar* )"\\g<p>(?@<p>\\(\\g<s>\\)){0}(?@<s>(?:\\g<p>)*|){0}";
92
93 static UChar* str2 = (UChar* )"x00x00x00";
94 static UChar* pattern2 = (UChar* )"(?@x(?@\\d+))+";
95
96 static UChar* str3 = (UChar* )"0123";
97 static UChar* pattern3 = (UChar* )"(?@.)(?@.)(?@.)(?@.)";
98
99 static UChar* str4 = (UChar* )"(((a))(a)) ((((a))(a)))";
100 static UChar* pattern4
101 = (UChar* )"\\g<p>(?@<p>\\(\\g<s>\\)){0}(?@<s>(?:\\g<p>)*|a){0}";
102
103 use_encs[0] = ONIG_ENCODING_ASCII;
104 onig_initialize(use_encs, sizeof(use_encs)/sizeof(use_encs[0]));
105
106 /* enable capture history */
107 onig_copy_syntax(&syn, ONIG_SYNTAX_DEFAULT);
108 onig_set_syntax_op2(&syn,
109 onig_get_syntax_op2(&syn) | ONIG_SYN_OP2_ATMARK_CAPTURE_HISTORY);
110
111 r = ex(str1, pattern1, &syn, ONIG_OPTION_NONE);
112 r = ex(str2, pattern2, &syn, ONIG_OPTION_NONE);
113 r = ex(str3, pattern3, &syn, ONIG_OPTION_NONE);
114 r = ex(str4, pattern4, &syn, ONIG_OPTION_FIND_LONGEST);
115
116 onig_end();
117 return r;
118 }
119