1 files changed, 107 insertions, 0 deletions
diff --git a/sample/listcap.c b/sample/listcap.c
new file mode 100644
index 0000000..9a4fd9a
--- /dev/null
+++ b/sample/listcap.c
@@ -0,0 +1,107 @@
+/*
+ * listcap.c
+ *
+ * capture history (?@...) sample.
+ */
+#include <stdio.h>
+#include <string.h>
+#include "oniguruma.h"
+
+static int
+node_callback(int group, int beg, int end, int level, int at, void* arg)
+{
+  int i;
+
+  if (at != ONIG_TRAVERSE_CALLBACK_AT_FIRST)
+    return -1; /* error */
+
+  /* indent */
+  for (i = 0; i < level * 2; i++)
+    fputc(' ', stderr);
+
+  fprintf(stderr, "%d: (%d-%d)\n", group, beg, end);
+  return 0;
+}
+
+extern int ex(unsigned char* str, unsigned char* pattern,
+              OnigSyntaxType* syntax)
+{
+  int r;
+  unsigned char *start, *range, *end;
+  regex_t* reg;
+  OnigErrorInfo einfo;
+  OnigRegion *region;
+
+  r = onig_new(&reg, pattern, pattern + strlen((char* )pattern),
+	       ONIG_OPTION_DEFAULT, ONIG_ENCODING_ASCII, syntax, &einfo);
+  if (r != ONIG_NORMAL) {
+    char s[ONIG_MAX_ERROR_MESSAGE_LEN];
+    onig_error_code_to_str(s, r, &einfo);
+    fprintf(stderr, "ERROR: %s\n", s);
+    return -1;
+  }
+
+  fprintf(stderr, "number of captures: %d\n", onig_number_of_captures(reg));
+  fprintf(stderr, "number of capture histories: %d\n",
+          onig_number_of_capture_histories(reg));
+
+  region = onig_region_new();
+
+  end   = str + strlen((char* )str);
+  start = str;
+  range = end;
+  r = onig_search(reg, str, end, start, range, region, ONIG_OPTION_NONE);
+  if (r >= 0) {
+    int i;
+
+    fprintf(stderr, "match at %d\n", r);
+    for (i = 0; i < region->num_regs; i++) {
+      fprintf(stderr, "%d: (%d-%d)\n", i, region->beg[i], region->end[i]);
+    }
+    fprintf(stderr, "\n");
+
+    r = onig_capture_tree_traverse(region, ONIG_TRAVERSE_CALLBACK_AT_FIRST,
+                                   node_callback, (void* )0);
+  }
+  else if (r == ONIG_MISMATCH) {
+    fprintf(stderr, "search fail\n");
+  }
+  else { /* error */
+    char s[ONIG_MAX_ERROR_MESSAGE_LEN];
+    onig_error_code_to_str(s, r);
+    return -1;
+  }
+
+  onig_region_free(region, 1 /* 1:free self, 0:free contents only */);
+  onig_free(reg);
+  return 0;
+}
+
+
+extern int main(int argc, char* argv[])
+{
+  int r;
+  OnigSyntaxType syn;
+
+  static UChar* str1 = (UChar* )"((())())";
+  static UChar* pattern1
+    = (UChar* )"\\g<p>(?@<p>\\(\\g<s>\\)){0}(?@<s>(?:\\g<p>)*|){0}";
+
+  static UChar* str2     = (UChar* )"x00x00x00";
+  static UChar* pattern2 = (UChar* )"(?@x(?@\\d+))+";
+
+  static UChar* str3     = (UChar* )"0123";
+  static UChar* pattern3 = (UChar* )"(?@.)(?@.)(?@.)(?@.)";
+
+ /* enable capture hostory */
+  onig_copy_syntax(&syn, ONIG_SYNTAX_DEFAULT);
+  onig_set_syntax_op2(&syn, 
+       onig_get_syntax_op2(&syn) | ONIG_SYN_OP2_ATMARK_CAPTURE_HISTORY);
+
+  r = ex(str1, pattern1, &syn);
+  r = ex(str2, pattern2, &syn);
+  r = ex(str3, pattern3, &syn);
+
+  onig_end();
+  return r;
+}