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/*
* Tokenizer.cpp
*
* Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Tokenizer.h"
namespace Mad {
namespace Common {
const std::string Tokenizer::delimiters = " \t\n\"'\\";
std::vector<std::string> Tokenizer::split(const std::string &str) {
std::vector<std::string> ret;
for(size_t s = 0; s < str.length();) {
size_t index = str.find_first_of(delimiters, s);
size_t length = (index == std::string::npos) ? std::string::npos : index-s;
ret.push_back(str.substr(s, length));
if(index != std::string::npos) {
size_t index2 = str.find_first_not_of(delimiters, index);
length = (index2 == std::string::npos) ? std::string::npos : index2-index;
ret.push_back(str.substr(index, length));
if(index2 != std::string::npos)
s = index2;
else
break;
}
else
break;
}
return ret;
}
bool Tokenizer::tokenize(const std::string &str, std::vector<std::string> &out) {
std::vector<std::string> splitString = split(str);
bool singleQuotes = false, doubleQuotes = false, escape = false;
std::string token;
bool forceToken = false;
out.clear();
for(std::vector<std::string>::iterator s = splitString.begin(); s != splitString.end(); ++s) {
token += *s;
escape = false;
if(++s == splitString.end())
break;
for(std::string::iterator c = s->begin(); c != s->end(); ++c) {
if(*c == '\n' && escape) {
escape = false;
if(doubleQuotes)
continue;
}
if(escape || (singleQuotes && *c != '\'')) {
token += *c;
escape = false;
continue;
}
switch(*c) {
case ' ':
case '\t':
case '\n':
if(doubleQuotes) {
token += *c;
}
else {
if(!token.empty() || forceToken) {
out.push_back(token);
token.clear();
forceToken = false;
}
}
break;
case '"':
doubleQuotes = !doubleQuotes;
forceToken = true;
break;
case '\'':
if(doubleQuotes) {
token += *c;
}
else {
singleQuotes = !singleQuotes;
forceToken = true;
}
break;
case '\\':
escape = true;
}
}
}
if(!token.empty() || forceToken)
out.push_back(token);
return !(singleQuotes || doubleQuotes || escape);
}
}
}
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