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da5612c792
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94033 13f79535-47bb-0310-9956-ffa450edef68
95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <pcre.h>
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/* Compile thuswise:
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gcc -Wall pcredemo.c -I/opt/local/include -L/opt/local/lib \
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-R/opt/local/lib -lpcre
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*/
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#define OVECCOUNT 30 /* should be a multiple of 3 */
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int main(int argc, char **argv)
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{
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pcre *re;
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const char *error;
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int erroffset;
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int ovector[OVECCOUNT];
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int rc, i;
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if (argc != 3)
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{
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printf("Two arguments required: a regex and a subject string\n");
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return 1;
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}
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/* Compile the regular expression in the first argument */
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re = pcre_compile(
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argv[1], /* the pattern */
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0, /* default options */
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&error, /* for error message */
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&erroffset, /* for error offset */
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NULL); /* use default character tables */
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/* Compilation failed: print the error message and exit */
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if (re == NULL)
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{
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printf("PCRE compilation failed at offset %d: %s\n", erroffset, error);
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return 1;
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}
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/* Compilation succeeded: match the subject in the second argument */
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rc = pcre_exec(
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re, /* the compiled pattern */
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NULL, /* no extra data - we didn't study the pattern */
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argv[2], /* the subject string */
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(int)strlen(argv[2]), /* the length of the subject */
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0, /* start at offset 0 in the subject */
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0, /* default options */
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ovector, /* output vector for substring information */
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OVECCOUNT); /* number of elements in the output vector */
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/* Matching failed: handle error cases */
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if (rc < 0)
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{
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switch(rc)
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{
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case PCRE_ERROR_NOMATCH: printf("No match\n"); break;
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/*
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Handle other special cases if you like
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*/
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default: printf("Matching error %d\n", rc); break;
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}
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return 1;
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}
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/* Match succeded */
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printf("Match succeeded\n");
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/* The output vector wasn't big enough */
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if (rc == 0)
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{
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rc = OVECCOUNT/3;
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printf("ovector only has room for %d captured substrings\n", rc - 1);
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}
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/* Show substrings stored in the output vector */
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for (i = 0; i < rc; i++)
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{
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char *substring_start = argv[2] + ovector[2*i];
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int substring_length = ovector[2*i+1] - ovector[2*i];
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printf("%2d: %.*s\n", i, substring_length, substring_start);
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}
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return 0;
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}
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