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#include "needle.h"
#include "options.h"
#include "parse_trigrams.h"
#include <assert.h>
#include <fnmatch.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <utility>
using namespace std;
bool matches(const Needle &needle, const char *haystack)
{
if (needle.type == Needle::STRSTR) {
return strstr(haystack, needle.str.c_str()) != nullptr;
} else if (needle.type == Needle::GLOB) {
int flags = ignore_case ? FNM_CASEFOLD : 0;
return fnmatch(needle.str.c_str(), haystack, flags) == 0;
} else {
assert(needle.type == Needle::REGEX);
return regexec(&needle.re, haystack, /*nmatch=*/0, /*pmatch=*/nullptr, /*flags=*/0) == 0;
}
}
string unescape_glob_to_plain_string(const string &needle)
{
string unescaped;
for (size_t i = 0; i < needle.size(); i += read_unigram(needle, i).second) {
uint32_t ch = read_unigram(needle, i).first;
assert(ch != WILDCARD_UNIGRAM);
if (ch == PREMATURE_END_UNIGRAM) {
fprintf(stderr, "Pattern '%s' ended prematurely\n", needle.c_str());
exit(1);
}
unescaped.push_back(ch);
}
return unescaped;
}
regex_t compile_regex(const string &needle)
{
regex_t re;
int flags = REG_NOSUB;
if (ignore_case) {
flags |= REG_ICASE;
}
if (use_extended_regex) {
flags |= REG_EXTENDED;
}
int err = regcomp(&re, needle.c_str(), flags);
if (err != 0) {
char errbuf[256];
regerror(err, &re, errbuf, sizeof(errbuf));
fprintf(stderr, "Error when compiling regex '%s': %s\n", needle.c_str(), errbuf);
exit(1);
}
return re;
}
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