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@yashi
Last active Jan 27, 2021
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PCRE Regex
/* -*- compile-command: "gcc -Wall -Wextra -g $(pkg-config --cflags --libs libpcre2-8) pcre.c" -*- */
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>
#include <string.h>
#include <stdio.h>
int main(void)
{
pcre2_code *re;
PCRE2_SPTR pattern = (PCRE2_SPTR)"^b";
pcre2_match_data *match_data;
int errornumber;
PCRE2_SIZE erroroffset;
int ret;
size_t i;
char *strings[] = {
"foo",
"bar",
"baz",
};
re = pcre2_compile(pattern, PCRE2_ZERO_TERMINATED, 0, &errornumber, &erroroffset, NULL);
if (!re) {
PCRE2_UCHAR buffer[256];
pcre2_get_error_message(errornumber, buffer, sizeof(buffer));
printf("PCRE2 compilation failed at offset %d: %s\n", (int)erroroffset,
buffer);
return 1;
}
match_data = pcre2_match_data_create_from_pattern(re, NULL);
for (i=0; i<(sizeof(strings)/sizeof(strings[0])); i++) {
ret = pcre2_match(re, (PCRE2_SPTR)strings[i], strlen(strings[i]), 0, 0, match_data, NULL);
if (ret < 0) {
switch(ret) {
case PCRE2_ERROR_NOMATCH:
printf("pattern `%s' does not match: %s\n", pattern, strings[i]);
break;
default:
printf("Matching error %d\n", ret);
break;
}
}
else {
printf("pattern `%s' match: %s\n", pattern, strings[i]);
}
}
pcre2_match_data_free(match_data);
pcre2_code_free(re);
return 0;
}
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