dateRegex.c

/*
 * dateRegex.c
 * 
 * Copyright 2023 Michael <michael@michael-Inspiron-1501>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 * 
 * 
 */
// 2023/01/22 19:50:27
// https://regex-generator.olafneumann.org/?sampleText=2020-03-12T13%3A34%3A56.123Z%20INFO%20%20%5Borg.example.Class%5D%3A%20This%20is%20a%20%23simple%20%23logline%20containing%20a%20%27value%27.&flags=i
#include <stdio.h>

int main(int argc, char **argv)
{
	int res;
	res = useRegex("2020-03-12T13:34:56\\.123Z INFO  \\[org\\.example\\.Class]: This is a #simple #logline containing a 'value'\\.");
	return 0;
}

#include <regex.h>

int useRegex(char* textToCheck) {
    regex_t compiledRegex;
    int reti;
    int actualReturnValue = -1;
    char messageBuffer[100];

    /* Compile regular expression */
    reti = regcomp(&compiledRegex, "2020-03-12T13:34:56\\.123Z INFO  \\[org\\.example\\.Class]: This is a #simple #logline containing a 'value'\\.", REG_EXTENDED | REG_ICASE);
    if (reti) {
        fprintf(stderr, "Could not compile regex\n");
        return -2;
    }

    /* Execute compiled regular expression */
    reti = regexec(&compiledRegex, textToCheck, 0, NULL, 0);
    if (!reti) {
        puts("Match");
        actualReturnValue = 0;
    } else if (reti == REG_NOMATCH) {
        puts("No match");
        actualReturnValue = 1;
    } else {
        regerror(reti, &compiledRegex, messageBuffer, sizeof(messageBuffer));
        fprintf(stderr, "Regex match failed: %s\n", messageBuffer);
        actualReturnValue = -3;
    }

    /* Free memory allocated to the pattern buffer by regcomp() */
    regfree(&compiledRegex);
    return actualReturnValue;
}