From 93751f5e0bbc35cf20c27d1e17c070555671f4f1 Mon Sep 17 00:00:00 2001
From: nigel <nigel@2f5784b3-3f2a-0410-8824-cb99058d5e15>
Date: Sat, 24 Feb 2007 21:39:42 +0000
Subject: Load pcre-3.5 into code/trunk.

git-svn-id: svn://vcs.exim.org/pcre/code/trunk@53 2f5784b3-3f2a-0410-8824-cb99058d5e15
---
 pcredemo.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 pcredemo.c

(limited to 'pcredemo.c')

diff --git a/pcredemo.c b/pcredemo.c
new file mode 100644
index 0000000..cb4e46f
--- /dev/null
+++ b/pcredemo.c
@@ -0,0 +1,94 @@
+#include <stdio.h>
+#include <string.h>
+#include <pcre.h>
+
+/* Compile thuswise:
+  gcc -Wall pcredemo.c -I/opt/local/include -L/opt/local/lib \
+    -R/opt/local/lib -lpcre
+*/
+
+#define OVECCOUNT 30    /* should be a multiple of 3 */
+
+int main(int argc, char **argv)
+{
+pcre *re;
+const char *error;
+int erroffset;
+int ovector[OVECCOUNT];
+int rc, i;
+
+if (argc != 3)
+  {
+  printf("Two arguments required: a regex and a subject string\n");
+  return 1;
+  }
+
+/* Compile the regular expression in the first argument */
+
+re = pcre_compile(
+  argv[1],              /* the pattern */
+  0,                    /* default options */
+  &error,               /* for error message */
+  &erroffset,           /* for error offset */
+  NULL);                /* use default character tables */
+
+/* Compilation failed: print the error message and exit */
+
+if (re == NULL)
+  {
+  printf("PCRE compilation failed at offset %d: %s\n", erroffset, error);
+  return 1;
+  }
+
+/* Compilation succeeded: match the subject in the second argument */
+
+rc = pcre_exec(
+  re,                   /* the compiled pattern */
+  NULL,                 /* no extra data - we didn't study the pattern */
+  argv[2],              /* the subject string */
+  (int)strlen(argv[2]), /* the length of the subject */
+  0,                    /* start at offset 0 in the subject */
+  0,                    /* default options */
+  ovector,              /* output vector for substring information */
+  OVECCOUNT);           /* number of elements in the output vector */
+
+/* Matching failed: handle error cases */
+
+if (rc < 0)
+  {
+  switch(rc)
+    {
+    case PCRE_ERROR_NOMATCH: printf("No match\n"); break;
+    /*
+    Handle other special cases if you like
+    */
+    default: printf("Matching error %d\n", rc); break;
+    }
+  return 1;
+  }
+
+/* Match succeded */
+
+printf("Match succeeded\n");
+
+/* The output vector wasn't big enough */
+
+if (rc == 0)
+  {
+  rc = OVECCOUNT/3;
+  printf("ovector only has room for %d captured substrings\n", rc - 1);
+  }
+
+/* Show substrings stored in the output vector */
+
+for (i = 0; i < rc; i++)
+  {
+  char *substring_start = argv[2] + ovector[2*i];
+  int substring_length = ovector[2*i+1] - ovector[2*i];
+  printf("%2d: %.*s\n", i, substring_length, substring_start);
+  }
+
+return 0;
+}
+
+
-- 
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