/*
 ============================================================================
 Name        : test_regexp.c
 Author      : martin.dvorak@mindforger.com
 Copyright   : Apache 2.0
 Description : A test for regular expression based matching
 ============================================================================
*/

#include <regex.h>
#include <stdio.h>
#include <stdbool.h>

#define REGEXP_MATCH_BUFFER_SIZE 10

void main() {
    bool caseSensitive=false;

    char *regexp="^b";
    char *text="This is a command that I want to match: go.sh there";

    regex_t compiled;
    int compilationFlags=(caseSensitive?0:REG_ICASE);
    printf("Regular expressions matching:\n  '%s'\n  '%s'",text,regexp);
    int compilationStatus=regcomp(&compiled, regexp, compilationFlags);
    printf("\nCompilation: %d",compilationStatus);

    int matches=REGEXP_MATCH_BUFFER_SIZE;
    regmatch_t matchPtr[REGEXP_MATCH_BUFFER_SIZE];
    int matchingFlags=0;
    int matchingStatus=regexec(&compiled, text, matches, matchPtr, matchingFlags);
    printf("\nMatching (status/matches): %s %d",(!matchingStatus?"match":"no-match"),matches);

    if(!matchingStatus) {
        int i;
        for(i=0; i<REGEXP_MATCH_BUFFER_SIZE; i++) {
            printf("\n  %d %d",matchPtr[i].rm_so, matchPtr[i].rm_eo);
            if(matchPtr[i].rm_so != -1) {
                printf("\n* %d %d",matchPtr[i].rm_so,matchPtr[i].rm_eo);
            }
        }
    } else {
        regerror(matchingStatus);
    }

    printf("\n");
}