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Diffstat (limited to 'src/3rdparty/glslang/glslang/MachineIndependent/preprocessor/PpTokens.cpp')
-rw-r--r-- | src/3rdparty/glslang/glslang/MachineIndependent/preprocessor/PpTokens.cpp | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/src/3rdparty/glslang/glslang/MachineIndependent/preprocessor/PpTokens.cpp b/src/3rdparty/glslang/glslang/MachineIndependent/preprocessor/PpTokens.cpp new file mode 100644 index 0000000..ac9d8ac --- /dev/null +++ b/src/3rdparty/glslang/glslang/MachineIndependent/preprocessor/PpTokens.cpp @@ -0,0 +1,219 @@ +// +// Copyright (C) 2002-2005 3Dlabs Inc. Ltd. +// Copyright (C) 2013 LunarG, Inc. +// Copyright (C) 2015-2018 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 3Dlabs Inc. Ltd. 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. +// +/****************************************************************************\ +Copyright (c) 2002, NVIDIA Corporation. + +NVIDIA Corporation("NVIDIA") supplies this software to you in +consideration of your agreement to the following terms, and your use, +installation, modification or redistribution of this NVIDIA software +constitutes acceptance of these terms. If you do not agree with these +terms, please do not use, install, modify or redistribute this NVIDIA +software. + +In consideration of your agreement to abide by the following terms, and +subject to these terms, NVIDIA grants you a personal, non-exclusive +license, under NVIDIA's copyrights in this original NVIDIA software (the +"NVIDIA Software"), to use, reproduce, modify and redistribute the +NVIDIA Software, with or without modifications, in source and/or binary +forms; provided that if you redistribute the NVIDIA Software, you must +retain the copyright notice of NVIDIA, this notice and the following +text and disclaimers in all such redistributions of the NVIDIA Software. +Neither the name, trademarks, service marks nor logos of NVIDIA +Corporation may be used to endorse or promote products derived from the +NVIDIA Software without specific prior written permission from NVIDIA. +Except as expressly stated in this notice, no other rights or licenses +express or implied, are granted by NVIDIA herein, including but not +limited to any patent rights that may be infringed by your derivative +works or by other works in which the NVIDIA Software may be +incorporated. No hardware is licensed hereunder. + +THE NVIDIA SOFTWARE IS BEING PROVIDED ON AN "AS IS" BASIS, WITHOUT +WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, +INCLUDING WITHOUT LIMITATION, WARRANTIES OR CONDITIONS OF TITLE, +NON-INFRINGEMENT, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR +ITS USE AND OPERATION EITHER ALONE OR IN COMBINATION WITH OTHER +PRODUCTS. + +IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT, +INCIDENTAL, EXEMPLARY, CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED +TO, LOST PROFITS; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF +USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) OR ARISING IN ANY WAY +OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE +NVIDIA SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, +TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF +NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +\****************************************************************************/ + +// +// For recording and playing back the stream of tokens in a macro definition. +// + +#ifndef _CRT_SECURE_NO_WARNINGS +#define _CRT_SECURE_NO_WARNINGS +#endif +#if (defined(_MSC_VER) && _MSC_VER < 1900 /*vs2015*/) +#define snprintf sprintf_s +#endif + +#include <cassert> +#include <cstdlib> +#include <cstring> +#include <cctype> + +#include "PpContext.h" +#include "PpTokens.h" + +namespace glslang { + +// Add a token (including backing string) to the end of a macro +// token stream, for later playback. +void TPpContext::TokenStream::putToken(int atom, TPpToken* ppToken) +{ + TokenStream::Token streamToken(atom, *ppToken); + stream.push_back(streamToken); +} + +// Read the next token from a macro token stream. +int TPpContext::TokenStream::getToken(TParseContextBase& parseContext, TPpToken *ppToken) +{ + if (atEnd()) + return EndOfInput; + + int atom = stream[currentPos++].get(*ppToken); + ppToken->loc = parseContext.getCurrentLoc(); + + // Check for ##, unless the current # is the last character + if (atom == '#') { + if (peekToken('#')) { + parseContext.requireProfile(ppToken->loc, ~EEsProfile, "token pasting (##)"); + parseContext.profileRequires(ppToken->loc, ~EEsProfile, 130, 0, "token pasting (##)"); + currentPos++; + atom = PpAtomPaste; + } + } + + return atom; +} + +// We are pasting if +// 1. we are preceding a pasting operator within this stream +// or +// 2. the entire macro is preceding a pasting operator (lastTokenPastes) +// and we are also on the last token +bool TPpContext::TokenStream::peekTokenizedPasting(bool lastTokenPastes) +{ + // 1. preceding ##? + + size_t savePos = currentPos; + // skip white space + while (peekToken(' ')) + ++currentPos; + if (peekToken(PpAtomPaste)) { + currentPos = savePos; + return true; + } + + // 2. last token and we've been told after this there will be a ## + + if (! lastTokenPastes) + return false; + // Getting here means the last token will be pasted, after this + + // Are we at the last non-whitespace token? + savePos = currentPos; + bool moreTokens = false; + do { + if (atEnd()) + break; + if (!peekToken(' ')) { + moreTokens = true; + break; + } + ++currentPos; + } while (true); + currentPos = savePos; + + return !moreTokens; +} + +// See if the next non-white-space tokens are two consecutive # +bool TPpContext::TokenStream::peekUntokenizedPasting() +{ + // don't return early, have to restore this + size_t savePos = currentPos; + + // skip white-space + while (peekToken(' ')) + ++currentPos; + + // check for ## + bool pasting = false; + if (peekToken('#')) { + ++currentPos; + if (peekToken('#')) + pasting = true; + } + + currentPos = savePos; + + return pasting; +} + +void TPpContext::pushTokenStreamInput(TokenStream& ts, bool prepasting) +{ + pushInput(new tTokenInput(this, &ts, prepasting)); + ts.reset(); +} + +int TPpContext::tUngotTokenInput::scan(TPpToken* ppToken) +{ + if (done) + return EndOfInput; + + int ret = token; + *ppToken = lval; + done = true; + + return ret; +} + +void TPpContext::UngetToken(int token, TPpToken* ppToken) +{ + pushInput(new tUngotTokenInput(this, token, ppToken)); +} + +} // end namespace glslang |