diff options
Diffstat (limited to 'chromium/third_party/glslang/src/hlsl/hlslTokenStream.cpp')
-rwxr-xr-x | chromium/third_party/glslang/src/hlsl/hlslTokenStream.cpp | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/chromium/third_party/glslang/src/hlsl/hlslTokenStream.cpp b/chromium/third_party/glslang/src/hlsl/hlslTokenStream.cpp new file mode 100755 index 00000000000..47f779a81f3 --- /dev/null +++ b/chromium/third_party/glslang/src/hlsl/hlslTokenStream.cpp @@ -0,0 +1,106 @@ +// +//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 |