#define PCRE2_CODE_UNIT_WIDTH 8 #include static inline bool regex_match(const char *shop) { pcre2_code *re = pcre2_compile((PCRE2_SPTR) "^[a-zA-Z0-9][a-zA-Z0-9\\-]*\\.myshopify\\.com", PCRE2_ZERO_TERMINATED, 0, &(int){ 0 }, &(PCRE2_SIZE){ 0 }, NULL); pcre2_match_data *match_data = pcre2_match_data_create_from_pattern(re, NULL); int rc = pcre2_match(re, (PCRE2_SPTR)shop, strlen(shop), 0, 0, match_data, NULL); pcre2_match_data_free(match_data); pcre2_code_free(re); return rc >= 0; }