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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the definition of class StringReader. The
// tests are in string_reader_test.cc.
#include <stdio.h>
#include "utils/cross/string_reader.h"
namespace o3d {
StringReader::StringReader(const std::string& input)
: TextReader(), input_(input), position_(0) {
}
StringReader::~StringReader() {
}
bool StringReader::IsAtEnd() const {
return position_ == input_.size();
}
std::string StringReader::PeekString(
std::string::size_type count) const {
count = std::min(input_.size() - position_, count);
if (count > 0) {
return input_.substr(position_, count);
} else {
return "";
}
}
char StringReader::ReadChar() {
if (position_ <= input_.size() && input_.size() > 0) {
position_++;
return input_[position_ - 1];
} else {
return 0;
}
}
std::string StringReader::ReadString(std::string::size_type count) {
count = std::min(input_.size() - position_, count);
std::string result;
if (count > 0) {
result = input_.substr(position_, count);
position_ += count;
}
return result;
}
std::string StringReader::ReadLine() {
std::string::size_type possible_eol = input_.find_first_of("\r\n", position_);
if (possible_eol == std::string::npos) {
// There wasn't an end of line marker anywhere, so just return the
// whole string.
return ReadToEnd();
} else {
if ((input_.size() - position_) > 1) {
// See which end of line marker we have and strip it.
int eol_len = TestForEndOfLine(input_.substr(possible_eol, 2));
std::string result = input_.substr(position_, possible_eol - position_);
position_ = possible_eol + eol_len;
return result;
} else {
// If it's only one long, and it found a carriage return or a
// linefeed, then we just eat that character and return an
// empty string.
position_++;
return std::string("");
}
}
return std::string("");
}
std::string StringReader::ReadToEnd() {
std::string result = input_.substr(position_);
position_ = input_.size();
return result;
}
} // end namespace o3d
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