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Diffstat (limited to 'Source/ThirdParty/ANGLE/src/compiler/preprocessor/new/pp.l')
| -rw-r--r-- | Source/ThirdParty/ANGLE/src/compiler/preprocessor/new/pp.l | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/Source/ThirdParty/ANGLE/src/compiler/preprocessor/new/pp.l b/Source/ThirdParty/ANGLE/src/compiler/preprocessor/new/pp.l new file mode 100644 index 0000000..627ca04 --- /dev/null +++ b/Source/ThirdParty/ANGLE/src/compiler/preprocessor/new/pp.l @@ -0,0 +1,181 @@ +/* +// +// Copyright (c) 2002-2011 The ANGLE Project Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +// + +This file contains the Lex specification for GLSL ES preprocessor. +Based on Microsoft Visual Studio 2010 Preprocessor Grammar: +http://msdn.microsoft.com/en-us/library/2scxys89.aspx + +IF YOU MODIFY THIS FILE YOU ALSO NEED TO RUN generate_parser.sh. +*/ + +%top{ +// +// Copyright (c) 2011 The ANGLE Project Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +// + +// This file is auto-generated by generate_parser.sh. DO NOT EDIT! +} + +%{ +#include "compiler/debug.h" +#include "Context.h" +#include "pp_tab.h" + +#define YY_USER_ACTION \ + do { \ + yylloc->first_line = yylineno; \ + yylloc->first_column = yycolumn + 1; \ + yycolumn += yyleng; \ + } while(0); + +#define YY_INPUT(buf, result, maxSize) \ + result = yyextra->readInput(buf, maxSize); + +static std::string* extractMacroName(const char* str, int len); +%} + +%option noyywrap nounput never-interactive +%option yylineno reentrant bison-bridge bison-locations +%option stack +%option prefix="pp" +%option extra-type="pp::Context*" + +HSPACE [ \t] +HASH ^{HSPACE}*#{HSPACE}* +IDENTIFIER [_a-zA-Z][_a-zA-Z0-9]* +PUNCTUATOR [][<>(){}.+-/*%^|&~=!:;,?] + +DECIMAL_CONSTANT [1-9][0-9]* +OCTAL_CONSTANT 0[0-7]* +HEXADECIMAL_CONSTANT 0[xX][0-9a-fA-F]+ + +DIGIT [0-9] +EXPONENT_PART [eE][+-]?{DIGIT}+ +FRACTIONAL_CONSTANT ({DIGIT}*"."{DIGIT}+)|({DIGIT}+".") + +%% + +{HASH} { return HASH; } + +{HASH}define{HSPACE}+{IDENTIFIER}/[ \t\n] { + yylval->sval = extractMacroName(yytext, yyleng); + return HASH_DEFINE_OBJ; +} +{HASH}define{HSPACE}+{IDENTIFIER}/"(" { + yylval->sval = extractMacroName(yytext, yyleng); + return HASH_DEFINE_FUNC; +} +{HASH}undef{HSPACE}+ { return HASH_UNDEF; } + +{HASH}if { return HASH_IF; } +{HASH}ifdef { return HASH_IFDEF; } +{HASH}ifndef { return HASH_IFNDEF; } +{HASH}else { return HASH_ELSE; } +{HASH}elif { return HASH_ELIF; } +{HASH}endif { return HASH_ENDIF; } +"defined" { return DEFINED; } + +{HASH}error { return HASH_ERROR; } +{HASH}pragma { return HASH_PRAGMA; } +{HASH}extension { return HASH_EXTENSION; } +{HASH}version { return HASH_VERSION; } +{HASH}line { return HASH_LINE; } + +{IDENTIFIER} { + yylval->sval = new std::string(yytext, yyleng); + return IDENTIFIER; +} + +{DECIMAL_CONSTANT}|{OCTAL_CONSTANT}|{HEXADECIMAL_CONSTANT} { + yylval->sval = new std::string(yytext, yyleng); + return INT_CONSTANT; +} + +({DIGIT}+{EXPONENT_PART})|({FRACTIONAL_CONSTANT}{EXPONENT_PART}?) { + yylval->sval = new std::string(yytext, yyleng); + return FLOAT_CONSTANT; +} + +{PUNCTUATOR} { return yytext[0]; } + +[ \t\v\f]+ { /* Ignore whitespace */ } + +\n { + ++yylineno; yycolumn = 0; + return yytext[0]; +} + +<*><<EOF>> { yyterminate(); } + +%% + +std::string* extractMacroName(const char* str, int len) +{ + // The input string is of the form {HASH}define{HSPACE}+{IDENTIFIER} + // We just need to find the last HSPACE. + ASSERT(str && (len > 8)); // strlen("#define ") == 8; + + std::string* name = NULL; + for (int i = len - 1; i >= 0; --i) + { + if ((str[i] == ' ') || (str[i] == '\t')) + { + name = new std::string(str + i + 1, len - i - 1); + break; + } + } + ASSERT(name); + return name; +} + +namespace pp { + +int Context::readInput(char* buf, int maxSize) +{ + int nread = YY_NULL; + while (!mInput->eof() && + (mInput->error() == pp::Input::kErrorNone) && + (nread == YY_NULL)) + { + int line = 0, file = 0; + pp::Token::decodeLocation(yyget_lineno(mLexer), &line, &file); + file = mInput->stringIndex(); + yyset_lineno(pp::Token::encodeLocation(line, file), mLexer); + + nread = mInput->read(buf, maxSize); + + if (mInput->error() == pp::Input::kErrorUnexpectedEOF) + { + // TODO(alokp): Report error. + } + } + return nread; +} + +bool Context::initLexer() +{ + ASSERT(mLexer == NULL); + + if (yylex_init_extra(this, &mLexer)) + return false; + + yyrestart(0, mLexer); + return true; +} + +void Context::destroyLexer() +{ + ASSERT(mLexer); + + yylex_destroy(mLexer); + mLexer = NULL; +} + +} // namespace pp + |