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#include <stdlib.h>
#include <stdio.h>
#include <regex.h>
#include <iostream>
#include <iterator>
#include "tools.h"
Error::Error()
{
stop=false;
}
void Error::warning(string s)
{
s.insert(0, "Warning: ");
messages.push_back(s);
}
void Error::error(string s)
{
s.insert(0, "Error: ");
messages.push_back(s);
stop=true;
}
void Error::print()
{
copy(messages.begin(), messages.end(), ostream_iterator<string>(cerr));
}
/*----------------------------------------------------------------------*/
Regexp::Regexp()
{
}
bool Regexp::matches(string pattern, string src, list<string> & matches)
{
regex_t pattern_buffer;
regmatch_t regs[10];
/* try to compile pattern */
int err=0;
if (src.empty() ||
(err=regcomp(&pattern_buffer, pattern.c_str(), REG_EXTENDED)) )
{
char msg[100];
if (!(src.empty()))
{
regerror(err, &pattern_buffer, msg, 100);
cerr << "Error in regular expression: "
<< pattern << '\n' << msg << '\n';
}
/* if error occured, no matching was found */
return false;
}
/* match the pattern against the given string */
if (regexec(&pattern_buffer, src.c_str(), 10, regs, 0)!=0)
/* no match */
return false;
/* copy the part left to the point where the matching starts */
int i;
for (i=1; i<9; i++)
{
if (regs[i].rm_so>=0)
matches.push_back(src.substr(regs[i].rm_so, regs[i].rm_eo - regs[i].rm_so));
}
/* return the end of the last match */
return true;
}
bool Regexp::substitute_local(string pattern, string src, string replacement,
string & dest, int & dest_end)
{
//cout << pattern << ":" << src << ":" << replacement << endl;
regex_t pattern_buffer;
regmatch_t regs[10];
/* try to compile pattern */
int err=0;
if (src.empty() || (err=regcomp(&pattern_buffer, pattern.c_str(),
REG_EXTENDED)) )
{
char msg[100];
if (!src.empty())
{
regerror(err, &pattern_buffer, msg, 100);
cerr << "Error in regular expression: "
<< pattern << '\n' << msg << '\n';
}
/* if error occured, do not make substitution */
dest=src;
return false;
}
/* match the pattern against the given string */
if (regexec(&pattern_buffer, src.c_str(), 10, regs, 0)!=0)
{
/* no match */
dest=src;
return false;
}
/* copy the part left to the point where the matching starts */
dest=src.substr(0,regs[0].rm_so);
unsigned int i=0;
while (i<replacement.length()) {
if (replacement[i]=='\\') {
i++;
if (replacement[i]>='0' && replacement[i]<='9') {
int num=replacement[i]-'0';
dest+=src.substr(regs[num].rm_so, regs[num].rm_eo - regs[num].rm_so);
} else
dest+=replacement[i];
}
else
dest+=replacement[i];
i++;
}
dest_end=dest.length();
dest+=src.substr(regs[0].rm_eo, src.length() - regs[0].rm_eo);
//cout << ":" << dest << endl;
return true;
}
void Regexp::substitute(string pattern, string src,
string replacement, string & dest, bool global)
{
string src_left, src_right, dest_right, result;
int differ, index=0, de=0;
//cout << "!" << src << "!" << global << endl;
if (global)
{
result=src;
do {
src_left=result.substr(0,index);
src_right=result.substr(index);
differ=substitute_local(pattern, src_right,
replacement, dest_right, de);
result=src_left+dest_right;
index+=de;
} while (differ);
dest=result;
}
else
substitute_local(pattern, src, replacement, dest, de);
}
/* transliterate a string like sed's y */
void Regexp::transliterate(string from, string to, string src, string & dest)
{
int i, pos;
dest=string();
for (i=0; i<(int)src.length(); i++)
{
pos=from.find(src[i]);
if (pos>=0 && pos<(int)to.length()) dest+=to[pos];
else dest+=src[i];
}
}
void Regexp::split(char c, string s, list<string> & r)
{
size_t b=0, e;
e=s.find(c,b);
if (e<s.npos)
{
do
{
r.push_back(s.substr(b,e-b)); // between separators
b=e+1;
e=s.find(c,b);
}
while (e<s.npos);
if (b<s.length())
r.push_back(s.substr(b,e-b)); // after the last separator
}
else
r.push_back(s); // no separator present
}
void Regexp::join(char c, list<string> & r, string & s)
{
list<string>::iterator it;
for (it=r.begin();
it!=r.end();
it++)
{
if (it!=r.begin())
s+=c;
s=(*it);
}
}
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