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#include "regexp.h"
#include "build.h" // For BuildException
#include "staticstring.h"
RegExp::RegExp() :
bCompiled( false ),
aSubStr( NULL )
{
}
RegExp::RegExp( const char *sSrc ) :
bCompiled( false ),
aSubStr( NULL )
{
compile( sSrc );
}
RegExp::~RegExp()
{
if( bCompiled )
{
regfree( &re );
delete[] aSubStr;
}
}
void RegExp::compile( const char *sSrc )
{
if( bCompiled )
{
regfree( &re );
delete[] aSubStr;
bCompiled = false;
}
int nErr = regcomp( &re, sSrc, REG_EXTENDED|REG_NEWLINE );
if( nErr )
{
size_t length = regerror( nErr, &re, NULL, 0 );
char *buffer = new char[length];
(void) regerror( nErr, &re, buffer, length );
StaticString s( buffer );
delete[] buffer;
throw BuildException( s.getString() );
}
bCompiled = true;
this->sSrc = sSrc;
nSubStr = re.re_nsub+1;
aSubStr = new regmatch_t[nSubStr];
}
int RegExp::getNumSubStrings()
{
return nSubStr;
}
bool RegExp::execute( const char *sSrc )
{
sTest = sSrc;
if( regexec( &re, sSrc, nSubStr, aSubStr, 0 ) )
return false;
return true;
}
std::pair<int,int> RegExp::getSubStringRange( int nIndex )
{
return std::pair<int,int>( aSubStr[nIndex].rm_so, aSubStr[nIndex].rm_eo );
}
std::string RegExp::getSubString( int nIndex )
{
return std::string(
sTest.getString()+aSubStr[nIndex].rm_so,
aSubStr[nIndex].rm_eo - aSubStr[nIndex].rm_so
);
}
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