107 lines
3.0 KiB
C++
107 lines
3.0 KiB
C++
|
//
|
||
|
|
//Copyright (C) 2016 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 HOLDERS 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.
|
||
|
|
//
|
||
|
|
|
||
|
|
#include "hlslTokenStream.h"
|
||
|
|
|
||
|
|
namespace glslang {
|
||
|
|
|
||
|
|
void HlslTokenStream::pushPreToken(const HlslToken& tok)
|
||
|
|
{
|
||
|
|
assert(preTokenStackSize == 0);
|
||
|
|
preTokenStack = tok;
|
||
|
|
++preTokenStackSize;
|
||
|
|
}
|
||
|
|
|
||
|
|
HlslToken HlslTokenStream::popPreToken()
|
||
|
|
{
|
||
|
|
assert(preTokenStackSize == 1);
|
||
|
|
--preTokenStackSize;
|
||
|
|
|
||
|
|
return preTokenStack;
|
||
|
|
}
|
||
|
|
|
||
|
|
void HlslTokenStream::pushTokenBuffer(const HlslToken& tok)
|
||
|
|
{
|
||
|
|
tokenBuffer = tok;
|
||
|
|
}
|
||
|
|
|
||
|
|
HlslToken HlslTokenStream::popTokenBuffer()
|
||
|
|
{
|
||
|
|
return tokenBuffer;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Load 'token' with the next token in the stream of tokens.
|
||
|
|
void HlslTokenStream::advanceToken()
|
||
|
|
{
|
||
|
|
pushTokenBuffer(token);
|
||
|
|
if (preTokenStackSize > 0)
|
||
|
|
token = popPreToken();
|
||
|
|
else
|
||
|
|
scanner.tokenize(token);
|
||
|
|
}
|
||
|
|
|
||
|
|
void HlslTokenStream::recedeToken()
|
||
|
|
{
|
||
|
|
pushPreToken(token);
|
||
|
|
token = popTokenBuffer();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return the current token class.
|
||
|
|
EHlslTokenClass HlslTokenStream::peek() const
|
||
|
|
{
|
||
|
|
return token.tokenClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return true, without advancing to the next token, if the current token is
|
||
|
|
// the expected (passed in) token class.
|
||
|
|
bool HlslTokenStream::peekTokenClass(EHlslTokenClass tokenClass) const
|
||
|
|
{
|
||
|
|
return peek() == tokenClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return true and advance to the next token if the current token is the
|
||
|
|
// expected (passed in) token class.
|
||
|
|
bool HlslTokenStream::acceptTokenClass(EHlslTokenClass tokenClass)
|
||
|
|
{
|
||
|
|
if (peekTokenClass(tokenClass)) {
|
||
|
|
advanceToken();
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // end namespace glslang
|