Revision 3e17855d6a9288302842fee9bf152e258f348d4f authored by Santosh Gunturu on 05 August 2016, 19:16:55 UTC, committed by Santosh Gunturu on 05 August 2016, 19:16:55 UTC
1 parent 0117143
regex.cpp
// enveomics/regex.h - Regular Expressions for enve-omics software
// @author Luis M. Rodriguez-R <lmrodriguezr at gmail dot com>
// @license artistic 2.0
// @version 1.0
#include <iostream>
#include <stdio.h>
#include <string>
#include <regex.h>
#include "universal.h"
using namespace std;
// The rreplace() function from: http://www.daniweb.com/software-development/c/code/216955
int rreplace (char *buf, int size, regex_t *re, char *rp)
{
char *pos;
int sub, so, n;
regmatch_t pmatch [10]; /* regoff_t is int so size is int */
if (regexec (re, buf, 10, pmatch, 0)) return 0;
for (pos = rp; *pos; pos++)
if (*pos == '\\' && *(pos + 1) > '0' && *(pos + 1) <= '9') {
so = pmatch [*(pos + 1) - 48].rm_so;
n = pmatch [*(pos + 1) - 48].rm_eo - so;
if (so < 0 || strlen (rp) + n - 1 > size) return 1;
memmove (pos + n, pos + 2, strlen (pos) - 1);
memmove (pos, buf + so, n);
pos = pos + n - 2;
}
sub = pmatch [1].rm_so; /* no repeated replace when sub >= 0 */
for (pos = buf; !regexec (re, pos, 1, pmatch, 0); ) {
n = pmatch [0].rm_eo - pmatch [0].rm_so;
pos += pmatch [0].rm_so;
if (strlen (buf) - n + strlen (rp) + 1 > size) return 1;
memmove (pos + strlen (rp), pos + n, strlen (pos) - n + 1);
memmove (pos, rp, strlen (rp));
pos += strlen (rp);
if (sub >= 0) break;
}
return 0;
}
// The str_replace() function from: http://www.zedwood.com/article/105/cpp-strreplace-function
string& str_replace(const string &search, const string &replace, string &subject)
{
string buffer;
int sealeng = search.length();
int strleng = subject.length();
if (sealeng==0)
return subject;//no change
for(int i=0, j=0; i<strleng; j=0 )
{
while (i+j<strleng && j<sealeng && subject[i+j]==search[j])
j++;
if (j==sealeng)//found 'search'
{
buffer.append(replace);
i+=sealeng;
}
else
{
buffer.append( &subject[i++], 1);
}
}
subject = buffer;
return subject;
}
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