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/// string tokenizer implementation
/**
* \file strtok.cpp
*
* string tokenizer
*
* Copyright (C) 2006, 2007, 2008 Lukas Jelinek, <lukas@aiken.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of one of the following licenses:
*
* \li 1. X11-style license (see LICENSE-X11)
* \li 2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL)
* \li 3. GNU General Public License, version 2 (see LICENSE-GPL)
*
* If you want to help with choosing the best license for you,
* please visit http://www.gnu.org/licenses/license-list.html.
*
*/
#include <sstream>
#include "strtok.h"
StringTokenizer::StringTokenizer(const std::string& rStr, char cDelim, char cPrefix)
{
m_str = rStr;
m_cDelim = cDelim;
m_cPrefix = cPrefix;
m_pos = 0;
m_len = rStr.length();
}
std::string StringTokenizer::GetNextToken(bool fSkipEmpty)
{
std::string s;
do {
_GetNextToken(s, true);
} while (fSkipEmpty && s.empty() && m_pos < m_len);
return s;
}
std::string StringTokenizer::GetNextTokenRaw(bool fSkipEmpty)
{
std::string s;
do {
_GetNextToken(s, false);
} while (fSkipEmpty && s.empty() && m_pos < m_len);
return s;
}
std::string StringTokenizer::GetRemainder()
{
return m_cPrefix == '\0'
? m_str.substr(m_pos)
: StripPrefix(m_str.c_str() + m_pos, m_len - m_pos);
}
std::string StringTokenizer::StripPrefix(const char* s, SIZE cnt)
{
std::ostringstream stream;
SIZE pos = 0;
while (pos < cnt) {
if (s[pos] == m_cPrefix) {
if ((pos < cnt - 1) && s[pos+1] == m_cPrefix) {
stream << m_cPrefix;
pos++;
}
}
else {
stream << s[pos];
}
pos++;
}
return stream.str();
}
void StringTokenizer::_GetNextToken(std::string& rToken, bool fStripPrefix)
{
if (m_cPrefix == '\0') {
_GetNextTokenNoPrefix(rToken);
}
else {
_GetNextTokenWithPrefix(rToken);
if (fStripPrefix)
rToken = StripPrefix(rToken.c_str(), rToken.length());
}
}
void StringTokenizer::_GetNextTokenNoPrefix(std::string& rToken)
{
const char* s = m_str.c_str();
for (SIZE i=m_pos; i<m_len; i++) {
if (s[i] == m_cDelim) {
rToken = m_str.substr(m_pos, i - m_pos);
m_pos = i + 1;
return;
}
}
rToken = m_str.substr(m_pos);
m_pos = m_len;
}
void StringTokenizer::_GetNextTokenWithPrefix(std::string& rToken)
{
int pref = 0;
const char* s = m_str.c_str();
for (SIZE i=m_pos; i<m_len; i++) {
if (s[i] == m_cDelim) {
if (pref == 0) {
rToken = m_str.substr(m_pos, i - m_pos);
m_pos = i + 1;
return;
}
else {
pref = 0;
}
}
else if (s[i] == m_cPrefix) {
if (pref == 1)
pref = 0;
else
pref = 1;
}
else {
pref = 0;
}
}
rToken = m_str.substr(m_pos);
m_pos = m_len;
}
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