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regex.cpp
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regex.cpp
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#include <string>
#include <string.h>
/* gnu/posix's regex header */
// #include <regex.h>
// #include "trex/trex.h"
#include "pcre/pcre.h"
/* our regex header */
#include "regex.h"
using namespace std;
/* http://www.gnu.org/s/libc/manual/html_node/Regular-Expressions.html */
bool Util::matchRegex(const string & str, const string & pattern){
pcre * regex;
const char * error;
int errorOffset;
int count;
regex = pcre_compile(pattern.c_str(), 0, &error, &errorOffset, NULL);
if (regex == NULL){
return false;
}
count = pcre_exec(regex, NULL, str.c_str(), str.size(), 0, 0, NULL, 0);
pcre_free(regex);
return count >= 0;
/*
TRex * regex;
regex = trex_compile(pattern.c_str(), NULL);
if (regex == NULL){
return false;
}
bool matched = trex_match(regex, str.c_str());
trex_free(regex);
return matched;
*/
/*
regex_t regex;
if (regcomp(&regex, pattern.c_str(), REG_EXTENDED) != 0){
return false;
}
bool matched = regexec(&regex, str.c_str(), 0, NULL, 0) == 0;
regfree(&regex);
return matched;
*/
}
string Util::captureRegex(const string & str, const string & pattern, int capture){
pcre * regex;
const char * error;
int errorOffset;
int count;
const int captureMax = 100;
int captures[captureMax];
regex = pcre_compile(pattern.c_str(), 0, &error, &errorOffset, NULL);
if (regex == NULL){
return "";
}
count = pcre_exec(regex, NULL, str.c_str(), str.size(), 0, 0, captures, captureMax);
pcre_free(regex);
if (count >= 0 && capture < count){
int start = captures[(capture + 1) * 2];
int end = captures[(capture + 1) * 2 + 1];
return str.substr(start, end - start);
}
return "";
#if 0
TRex * regex;
regex = trex_compile(pattern.c_str(), NULL);
if (regex == NULL){
return "";
}
string out = "";
bool matched = trex_match(regex, str.c_str());
if (matched){
TRexMatch match;
/* match 0 is the full string matched */
if (trex_getsubexp(regex, capture + 1, &match)){
/* WARNING: hack.. */
static char tmp[2048];
memset(tmp, 0, sizeof(tmp));
strncpy(tmp, match.begin, match.len < (int) sizeof(tmp) ? match.len : sizeof(tmp));
out = tmp;
}
}
trex_free(regex);
return out;
#endif
/* FIXME */
/*
regex_t regex;
regmatch_t matches[20];
if (regcomp(&regex, pattern.c_str(), REG_EXTENDED) != 0){
return "";
}
bool matched = regexec(&regex, str.c_str(), 20, matches, 0) == 0;
regfree(&regex);
if (matched){
if (matches[capture+1].rm_so != -1){
int start = matches[capture+1].rm_so;
int end = matches[capture+1].rm_eo;
return str.substr(start, end - start);
}
}
return "";
*/
}

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