diff options
Diffstat (limited to 'chromium/third_party/angle/src/compiler/translator/glslang.l')
| -rw-r--r-- | chromium/third_party/angle/src/compiler/translator/glslang.l | 558 |
1 files changed, 558 insertions, 0 deletions
diff --git a/chromium/third_party/angle/src/compiler/translator/glslang.l b/chromium/third_party/angle/src/compiler/translator/glslang.l new file mode 100644 index 00000000000..518b78df11e --- /dev/null +++ b/chromium/third_party/angle/src/compiler/translator/glslang.l @@ -0,0 +1,558 @@ +/* +// +// Copyright (c) 2002-2013 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. +Based on ANSI C grammar, Lex specification: +http://www.lysator.liu.se/c/ANSI-C-grammar-l.html + +IF YOU MODIFY THIS FILE YOU ALSO NEED TO RUN generate_parser.sh, +WHICH GENERATES THE GLSL ES LEXER (glslang_lex.cpp). +*/ + +%top{ +// +// Copyright (c) 2012-2013 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! + +// Ignore errors in auto-generated code. +#if defined(__GNUC__) +#pragma GCC diagnostic ignored "-Wunused-function" +#pragma GCC diagnostic ignored "-Wunused-variable" +#pragma GCC diagnostic ignored "-Wswitch-enum" +#elif defined(_MSC_VER) +#pragma warning(disable: 4065) +#pragma warning(disable: 4189) +#pragma warning(disable: 4505) +#pragma warning(disable: 4701) +#endif +} + +%{ +#include "compiler/translator/glslang.h" +#include "compiler/translator/ParseContext.h" +#include "compiler/preprocessor/Token.h" +#include "compiler/translator/util.h" +#include "compiler/translator/length_limits.h" +#include "glslang_tab.h" + +/* windows only pragma */ +#ifdef _MSC_VER +#pragma warning(disable : 4102) +#endif + +#define YY_USER_ACTION \ + yylloc->first_file = yylloc->last_file = yycolumn; \ + yylloc->first_line = yylloc->last_line = yylineno; + +#define YY_INPUT(buf, result, max_size) \ + result = string_input(buf, max_size, yyscanner); + +static yy_size_t string_input(char* buf, yy_size_t max_size, yyscan_t yyscanner); +static int check_type(yyscan_t yyscanner); +static int reserved_word(yyscan_t yyscanner); +static int ES2_reserved_ES3_keyword(TParseContext *context, int token); +static int ES2_keyword_ES3_reserved(TParseContext *context, int token); +static int ES2_ident_ES3_keyword(TParseContext *context, int token); +static int uint_constant(TParseContext *context); +static int int_constant(yyscan_t yyscanner); +static int float_constant(yyscan_t yyscanner); +static int floatsuffix_check(TParseContext* context); +%} + +%option noyywrap nounput never-interactive +%option yylineno reentrant bison-bridge bison-locations +%option extra-type="TParseContext*" + +D [0-9] +L [a-zA-Z_] +H [a-fA-F0-9] +E [Ee][+-]?{D}+ +O [0-7] + +%% + +%{ + TParseContext* context = yyextra; +%} + +"invariant" { return INVARIANT; } +"highp" { return HIGH_PRECISION; } +"mediump" { return MEDIUM_PRECISION; } +"lowp" { return LOW_PRECISION; } +"precision" { return PRECISION; } + +"attribute" { return ES2_keyword_ES3_reserved(context, ATTRIBUTE); } +"const" { return CONST_QUAL; } +"uniform" { return UNIFORM; } +"varying" { return ES2_keyword_ES3_reserved(context, VARYING); } + +"break" { return BREAK; } +"continue" { return CONTINUE; } +"do" { return DO; } +"for" { return FOR; } +"while" { return WHILE; } + +"if" { return IF; } +"else" { return ELSE; } +"switch" { return ES2_reserved_ES3_keyword(context, SWITCH); } +"case" { return ES2_ident_ES3_keyword(context, CASE); } +"default" { return ES2_reserved_ES3_keyword(context, DEFAULT); } + +"centroid" { return ES2_ident_ES3_keyword(context, CENTROID); } +"flat" { return ES2_reserved_ES3_keyword(context, FLAT); } +"smooth" { return ES2_ident_ES3_keyword(context, SMOOTH); } + +"in" { return IN_QUAL; } +"out" { return OUT_QUAL; } +"inout" { return INOUT_QUAL; } + +"float" { return FLOAT_TYPE; } +"int" { return INT_TYPE; } +"uint" { return ES2_ident_ES3_keyword(context, UINT_TYPE); } +"void" { return VOID_TYPE; } +"bool" { return BOOL_TYPE; } +"true" { yylval->lex.b = true; return BOOLCONSTANT; } +"false" { yylval->lex.b = false; return BOOLCONSTANT; } + +"discard" { return DISCARD; } +"return" { return RETURN; } + +"mat2" { return MATRIX2; } +"mat3" { return MATRIX3; } +"mat4" { return MATRIX4; } + +"mat2x2" { return ES2_ident_ES3_keyword(context, MATRIX2); } +"mat3x3" { return ES2_ident_ES3_keyword(context, MATRIX3); } +"mat4x4" { return ES2_ident_ES3_keyword(context, MATRIX4); } + +"mat2x3" { return ES2_ident_ES3_keyword(context, MATRIX2x3); } +"mat3x2" { return ES2_ident_ES3_keyword(context, MATRIX3x2); } +"mat2x4" { return ES2_ident_ES3_keyword(context, MATRIX2x4); } +"mat4x2" { return ES2_ident_ES3_keyword(context, MATRIX4x2); } +"mat3x4" { return ES2_ident_ES3_keyword(context, MATRIX3x4); } +"mat4x3" { return ES2_ident_ES3_keyword(context, MATRIX4x3); } + +"vec2" { return VEC2; } +"vec3" { return VEC3; } +"vec4" { return VEC4; } +"ivec2" { return IVEC2; } +"ivec3" { return IVEC3; } +"ivec4" { return IVEC4; } +"bvec2" { return BVEC2; } +"bvec3" { return BVEC3; } +"bvec4" { return BVEC4; } +"uvec2" { return ES2_ident_ES3_keyword(context, UVEC2); } +"uvec3" { return ES2_ident_ES3_keyword(context, UVEC3); } +"uvec4" { return ES2_ident_ES3_keyword(context, UVEC4); } + +"sampler2D" { return SAMPLER2D; } +"samplerCube" { return SAMPLERCUBE; } +"samplerExternalOES" { return SAMPLER_EXTERNAL_OES; } +"sampler3D" { return ES2_reserved_ES3_keyword(context, SAMPLER3D); } +"sampler3DRect" { return ES2_reserved_ES3_keyword(context, SAMPLER3DRECT); } +"sampler2DRect" { return SAMPLER2DRECT; } +"sampler2DArray" { return ES2_ident_ES3_keyword(context, SAMPLER2DARRAY); } +"isampler2D" { return ES2_ident_ES3_keyword(context, ISAMPLER2D); } +"isampler3D" { return ES2_ident_ES3_keyword(context, ISAMPLER3D); } +"isamplerCube" { return ES2_ident_ES3_keyword(context, ISAMPLERCUBE); } +"isampler2DArray" { return ES2_ident_ES3_keyword(context, ISAMPLER2DARRAY); } +"usampler2D" { return ES2_ident_ES3_keyword(context, USAMPLER2D); } +"usampler3D" { return ES2_ident_ES3_keyword(context, USAMPLER3D); } +"usamplerCube" { return ES2_ident_ES3_keyword(context, USAMPLERCUBE); } +"usampler2DArray" { return ES2_ident_ES3_keyword(context, USAMPLER2DARRAY); } +"sampler2DShadow" { return ES2_reserved_ES3_keyword(context, SAMPLER2DSHADOW); } +"samplerCubeShadow" { return ES2_ident_ES3_keyword(context, SAMPLERCUBESHADOW); } +"sampler2DArrayShadow" { return ES2_ident_ES3_keyword(context, SAMPLER2DARRAYSHADOW); } + +"struct" { return STRUCT; } + +"layout" { return ES2_ident_ES3_keyword(context, LAYOUT); } + + /* Reserved keywords for GLSL ES 3.00 that are not reserved for GLSL ES 1.00 */ +"coherent" | +"restrict" | +"readonly" | +"writeonly" | +"resource" | +"atomic_uint" | +"noperspective" | +"patch" | +"sample" | +"subroutine" | +"common" | +"partition" | +"active" | + +"filter" | +"image1D" | +"image2D" | +"image3D" | +"imageCube" | +"iimage1D" | +"iimage2D" | +"iimage3D" | +"iimageCube" | +"uimage1D" | +"uimage2D" | +"uimage3D" | +"uimageCube" | +"image1DArray" | +"image2DArray" | +"iimage1DArray" | +"iimage2DArray" | +"uimage1DArray" | +"uimage2DArray" | +"image1DShadow" | +"image2DShadow" | +"image1DArrayShadow" | +"image2DArrayShadow" | +"imageBuffer" | +"iimageBuffer" | +"uimageBuffer" | + +"sampler1DArray" | +"sampler1DArrayShadow" | +"isampler1D" | +"isampler1DArray" | +"usampler1D" | +"usampler1DArray" | +"isampler2DRect" | +"usampler2DRect" | +"samplerBuffer" | +"isamplerBuffer" | +"usamplerBuffer" | +"sampler2DMS" | +"isampler2DMS" | +"usampler2DMS" | +"sampler2DMSArray" | +"isampler2DMSArray" | +"usampler2DMSArray" { + if (context->shaderVersion < 300) { + yylval->lex.string = NewPoolTString(yytext); + return check_type(yyscanner); + } + return reserved_word(yyscanner); +} + + /* Reserved keywords in GLSL ES 1.00 that are not reserved in GLSL ES 3.00 */ +"packed" { + if (context->shaderVersion >= 300) + { + yylval->lex.string = NewPoolTString(yytext); + return check_type(yyscanner); + } + + return reserved_word(yyscanner); +} + + /* Reserved keywords */ +"asm" | + +"class" | +"union" | +"enum" | +"typedef" | +"template" | +"this" | + +"goto" | + +"inline" | +"noinline" | +"volatile" | +"public" | +"static" | +"extern" | +"external" | +"interface" | + +"long" | +"short" | +"double" | +"half" | +"fixed" | +"unsigned" | +"superp" | + +"input" | +"output" | + +"hvec2" | +"hvec3" | +"hvec4" | +"dvec2" | +"dvec3" | +"dvec4" | +"fvec2" | +"fvec3" | +"fvec4" | + +"sampler1D" | +"sampler1DShadow" | +"sampler2DRectShadow" | + +"sizeof" | +"cast" | + +"namespace" | +"using" { return reserved_word(yyscanner); } + +{L}({L}|{D})* { + yylval->lex.string = NewPoolTString(yytext); + return check_type(yyscanner); +} + +0[xX]{H}+ { return int_constant(yyscanner); } +0{O}+ { return int_constant(yyscanner); } +{D}+ { return int_constant(yyscanner); } + +0[xX]{H}+[uU] { return uint_constant(context); } +0{O}+[uU] { return uint_constant(context); } +{D}+[uU] { return uint_constant(context); } + +{D}+{E} { return float_constant(yyscanner); } +{D}+"."{D}*({E})? { return float_constant(yyscanner); } +"."{D}+({E})? { return float_constant(yyscanner); } + +{D}+{E}[fF] { return floatsuffix_check(context); } +{D}+"."{D}*({E})?[fF] { return floatsuffix_check(context); } +"."{D}+({E})?[fF] { return floatsuffix_check(context); } + +"+=" { return ADD_ASSIGN; } +"-=" { return SUB_ASSIGN; } +"*=" { return MUL_ASSIGN; } +"/=" { return DIV_ASSIGN; } +"%=" { return MOD_ASSIGN; } +"<<=" { return LEFT_ASSIGN; } +">>=" { return RIGHT_ASSIGN; } +"&=" { return AND_ASSIGN; } +"^=" { return XOR_ASSIGN; } +"|=" { return OR_ASSIGN; } + +"++" { return INC_OP; } +"--" { return DEC_OP; } +"&&" { return AND_OP; } +"||" { return OR_OP; } +"^^" { return XOR_OP; } +"<=" { return LE_OP; } +">=" { return GE_OP; } +"==" { return EQ_OP; } +"!=" { return NE_OP; } +"<<" { return LEFT_OP; } +">>" { return RIGHT_OP; } +";" { return SEMICOLON; } +("{"|"<%") { return LEFT_BRACE; } +("}"|"%>") { return RIGHT_BRACE; } +"," { return COMMA; } +":" { return COLON; } +"=" { return EQUAL; } +"(" { return LEFT_PAREN; } +")" { return RIGHT_PAREN; } +("["|"<:") { return LEFT_BRACKET; } +("]"|":>") { return RIGHT_BRACKET; } +"." { return DOT; } +"!" { return BANG; } +"-" { return DASH; } +"~" { return TILDE; } +"+" { return PLUS; } +"*" { return STAR; } +"/" { return SLASH; } +"%" { return PERCENT; } +"<" { return LEFT_ANGLE; } +">" { return RIGHT_ANGLE; } +"|" { return VERTICAL_BAR; } +"^" { return CARET; } +"&" { return AMPERSAND; } +"?" { return QUESTION; } + +[ \t\v\n\f\r] { } +<<EOF>> { yyterminate(); } +. { assert(false); return 0; } + +%% + +yy_size_t string_input(char* buf, yy_size_t max_size, yyscan_t yyscanner) { + pp::Token token; + yyget_extra(yyscanner)->preprocessor.lex(&token); + yy_size_t len = token.type == pp::Token::LAST ? 0 : token.text.size(); + if (len < max_size) + memcpy(buf, token.text.c_str(), len); + yyset_column(token.location.file, yyscanner); + yyset_lineno(token.location.line, yyscanner); + + if (len >= max_size) + YY_FATAL_ERROR("Input buffer overflow"); + else if (len > 0) + buf[len++] = ' '; + return len; +} + +int check_type(yyscan_t yyscanner) { + struct yyguts_t* yyg = (struct yyguts_t*) yyscanner; + + int token = IDENTIFIER; + TSymbol* symbol = yyextra->symbolTable.find(yytext, yyextra->shaderVersion); + if (symbol && symbol->isVariable()) { + TVariable* variable = static_cast<TVariable*>(symbol); + if (variable->isUserType()) { + token = TYPE_NAME; + } + } + yylval->lex.symbol = symbol; + return token; +} + +int reserved_word(yyscan_t yyscanner) { + struct yyguts_t* yyg = (struct yyguts_t*) yyscanner; + + yyextra->error(*yylloc, "Illegal use of reserved word", yytext, ""); + yyextra->recover(); + return 0; +} + +int ES2_reserved_ES3_keyword(TParseContext *context, int token) +{ + yyscan_t yyscanner = (yyscan_t) context->scanner; + + if (context->shaderVersion < 300) + { + return reserved_word(yyscanner); + } + + return token; +} + +int ES2_keyword_ES3_reserved(TParseContext *context, int token) +{ + yyscan_t yyscanner = (yyscan_t) context->scanner; + + if (context->shaderVersion >= 300) + { + return reserved_word(yyscanner); + } + + return token; +} + +int ES2_ident_ES3_keyword(TParseContext *context, int token) +{ + struct yyguts_t* yyg = (struct yyguts_t*) context->scanner; + yyscan_t yyscanner = (yyscan_t) context->scanner; + + // not a reserved word in GLSL ES 1.00, so could be used as an identifier/type name + if (context->shaderVersion < 300) + { + yylval->lex.string = NewPoolTString(yytext); + return check_type(yyscanner); + } + + return token; +} + +int uint_constant(TParseContext *context) +{ + struct yyguts_t* yyg = (struct yyguts_t*) context->scanner; + yyscan_t yyscanner = (yyscan_t) context->scanner; + + if (context->shaderVersion < 300) + { + context->error(*yylloc, "Unsigned integers are unsupported prior to GLSL ES 3.00", yytext, ""); + context->recover(); + return 0; + } + + if (!atoi_clamp(yytext, &(yylval->lex.i))) + yyextra->warning(*yylloc, "Integer overflow", yytext, ""); + + return UINTCONSTANT; +} + +int floatsuffix_check(TParseContext* context) +{ + struct yyguts_t* yyg = (struct yyguts_t*) context->scanner; + + if (context->shaderVersion < 300) + { + context->error(*yylloc, "Floating-point suffix unsupported prior to GLSL ES 3.00", yytext); + context->recover(); + return 0; + } + + if (!atof_clamp(yytext, &(yylval->lex.f))) + yyextra->warning(*yylloc, "Float overflow", yytext, ""); + + return(FLOATCONSTANT); +} + +void yyerror(YYLTYPE* lloc, TParseContext* context, const char* reason) { + context->error(*lloc, reason, yyget_text(context->scanner)); + context->recover(); +} + +int int_constant(yyscan_t yyscanner) { + struct yyguts_t* yyg = (struct yyguts_t*) yyscanner; + + if (!atoi_clamp(yytext, &(yylval->lex.i))) + yyextra->warning(*yylloc, "Integer overflow", yytext, ""); + return INTCONSTANT; +} + +int float_constant(yyscan_t yyscanner) { + struct yyguts_t* yyg = (struct yyguts_t*) yyscanner; + + if (!atof_clamp(yytext, &(yylval->lex.f))) + yyextra->warning(*yylloc, "Float overflow", yytext, ""); + return FLOATCONSTANT; +} + +int glslang_initialize(TParseContext* context) { + yyscan_t scanner = NULL; + if (yylex_init_extra(context, &scanner)) + return 1; + + context->scanner = scanner; + return 0; +} + +int glslang_finalize(TParseContext* context) { + yyscan_t scanner = context->scanner; + if (scanner == NULL) return 0; + + context->scanner = NULL; + yylex_destroy(scanner); + + return 0; +} + +int glslang_scan(size_t count, const char* const string[], const int length[], + TParseContext* context) { + yyrestart(NULL, context->scanner); + yyset_column(0, context->scanner); + yyset_lineno(1, context->scanner); + + // Initialize preprocessor. + if (!context->preprocessor.init(count, string, length)) + return 1; + + // Define extension macros. + const TExtensionBehavior& extBehavior = context->extensionBehavior(); + for (TExtensionBehavior::const_iterator iter = extBehavior.begin(); + iter != extBehavior.end(); ++iter) { + context->preprocessor.predefineMacro(iter->first.c_str(), 1); + } + if (context->fragmentPrecisionHigh) + context->preprocessor.predefineMacro("GL_FRAGMENT_PRECISION_HIGH", 1); + + context->preprocessor.setMaxTokenSize(GetGlobalMaxTokenSize(context->shaderSpec)); + + return 0; +} + |