chromium/third_party/glslang/src/glslang/HLSL/hlslScanContext.cpp

//
// Copyright (C) 2016 Google, Inc.
// Copyright (C) 2016 LunarG, Inc.
//
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//    notice, this list of conditions and the following disclaimer.
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//

//
// HLSL scanning, leveraging the scanning done by the preprocessor.
//

#include <cstring>
#include <unordered_map>
#include <unordered_set>

#include "../Include/Types.h"
#include "../MachineIndependent/SymbolTable.h"
#include "../MachineIndependent/ParseHelper.h"
#include "hlslScanContext.h"
#include "hlslTokens.h"

// preprocessor includes
#include "../MachineIndependent/preprocessor/PpContext.h"
#include "../MachineIndependent/preprocessor/PpTokens.h"

namespace {

struct str_eq
{ … };

struct str_hash
{ … };

// A single global usable by all threads, by all versions, by all languages.
// After a single process-level initialization, this is read only and thread safe
std::unordered_map<const char*, glslang::EHlslTokenClass, str_hash, str_eq>* KeywordMap = …;
std::unordered_set<const char*, str_hash, str_eq>* ReservedSet = …;
std::unordered_map<const char*, glslang::TBuiltInVariable, str_hash, str_eq>* SemanticMap = …;

};

namespace glslang {

void HlslScanContext::fillInKeywordMap()
{ … }

void HlslScanContext::deleteKeywordMap()
{ … }

// Wrapper for tokenizeClass() to get everything inside the token.
void HlslScanContext::tokenize(HlslToken& token)
{ … }

glslang::TBuiltInVariable HlslScanContext::mapSemantic(const char* upperCase)
{ … }

//
// Fill in token information for the next token, except for the token class.
// Returns the enum value of the token class of the next token found.
// Return 0 (EndOfTokens) on end of input.
//
EHlslTokenClass HlslScanContext::tokenizeClass(HlslToken& token)
{ … }

EHlslTokenClass HlslScanContext::tokenizeIdentifier()
{ … }

EHlslTokenClass HlslScanContext::identifierOrType()
{ … }

// Give an error for use of a reserved symbol.
// However, allow built-in declarations to use reserved words, to allow
// extension support before the extension is enabled.
EHlslTokenClass HlslScanContext::reservedWord()
{ … }

} // end namespace glslang