| /* |
| // |
| // Copyright (c) 2002-2010 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) 2010 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/glslang.h" |
| #include "compiler/ParseHelper.h" |
| #include "compiler/util.h" |
| #include "glslang_tab.h" |
| |
| /* windows only pragma */ |
| #ifdef _MSC_VER |
| #pragma warning(disable : 4102) |
| #endif |
| |
| #define YY_USER_ACTION yylval->lex.line = yylineno; |
| #define YY_INPUT(buf, result, max_size) \ |
| result = string_input(buf, max_size, yyscanner); |
| |
| static int string_input(char* buf, int max_size, yyscan_t yyscanner); |
| static int check_type(yyscan_t yyscanner); |
| static int reserved_word(yyscan_t yyscanner); |
| %} |
| |
| %option noyywrap nounput never-interactive |
| %option yylineno reentrant bison-bridge |
| %option stack |
| %option extra-type="TParseContext*" |
| %x COMMENT FIELDS |
| |
| D [0-9] |
| L [a-zA-Z_] |
| H [a-fA-F0-9] |
| E [Ee][+-]?{D}+ |
| O [0-7] |
| |
| %% |
| |
| %{ |
| TParseContext* context = yyextra; |
| %} |
| |
| /* Single-line comments */ |
| "//"[^\n]* ; |
| |
| /* Multi-line comments */ |
| "/*" { yy_push_state(COMMENT, yyscanner); } |
| <COMMENT>. | |
| <COMMENT>\n ; |
| <COMMENT>"*/" { yy_pop_state(yyscanner); } |
| |
| "invariant" { return(INVARIANT); } |
| "highp" { return(HIGH_PRECISION); } |
| "mediump" { return(MEDIUM_PRECISION); } |
| "lowp" { return(LOW_PRECISION); } |
| "precision" { return(PRECISION); } |
| |
| "attribute" { return(ATTRIBUTE); } |
| "const" { return(CONST_QUAL); } |
| "uniform" { return(UNIFORM); } |
| "varying" { return(VARYING); } |
| |
| "break" { return(BREAK); } |
| "continue" { return(CONTINUE); } |
| "do" { return(DO); } |
| "for" { return(FOR); } |
| "while" { return(WHILE); } |
| |
| "if" { return(IF); } |
| "else" { return(ELSE); } |
| |
| "in" { return(IN_QUAL); } |
| "out" { return(OUT_QUAL); } |
| "inout" { return(INOUT_QUAL); } |
| |
| "float" { context->lexAfterType = true; return(FLOAT_TYPE); } |
| "int" { context->lexAfterType = true; return(INT_TYPE); } |
| "void" { context->lexAfterType = true; return(VOID_TYPE); } |
| "bool" { context->lexAfterType = true; return(BOOL_TYPE); } |
| "true" { yylval->lex.b = true; return(BOOLCONSTANT); } |
| "false" { yylval->lex.b = false; return(BOOLCONSTANT); } |
| |
| "discard" { return(DISCARD); } |
| "return" { return(RETURN); } |
| |
| "mat2" { context->lexAfterType = true; return(MATRIX2); } |
| "mat3" { context->lexAfterType = true; return(MATRIX3); } |
| "mat4" { context->lexAfterType = true; return(MATRIX4); } |
| |
| "vec2" { context->lexAfterType = true; return (VEC2); } |
| "vec3" { context->lexAfterType = true; return (VEC3); } |
| "vec4" { context->lexAfterType = true; return (VEC4); } |
| "ivec2" { context->lexAfterType = true; return (IVEC2); } |
| "ivec3" { context->lexAfterType = true; return (IVEC3); } |
| "ivec4" { context->lexAfterType = true; return (IVEC4); } |
| "bvec2" { context->lexAfterType = true; return (BVEC2); } |
| "bvec3" { context->lexAfterType = true; return (BVEC3); } |
| "bvec4" { context->lexAfterType = true; return (BVEC4); } |
| |
| "sampler2D" { context->lexAfterType = true; return SAMPLER2D; } |
| "samplerCube" { context->lexAfterType = true; return SAMPLERCUBE; } |
| "samplerExternalOES" { context->lexAfterType = true; return SAMPLER_EXTERNAL_OES; } |
| |
| "struct" { context->lexAfterType = true; return(STRUCT); } |
| |
| "asm" { return reserved_word(yyscanner); } |
| |
| "class" { return reserved_word(yyscanner); } |
| "union" { return reserved_word(yyscanner); } |
| "enum" { return reserved_word(yyscanner); } |
| "typedef" { return reserved_word(yyscanner); } |
| "template" { return reserved_word(yyscanner); } |
| "this" { return reserved_word(yyscanner); } |
| "packed" { return reserved_word(yyscanner); } |
| |
| "goto" { return reserved_word(yyscanner); } |
| "switch" { return reserved_word(yyscanner); } |
| "default" { return reserved_word(yyscanner); } |
| |
| "inline" { return reserved_word(yyscanner); } |
| "noinline" { return reserved_word(yyscanner); } |
| "volatile" { return reserved_word(yyscanner); } |
| "public" { return reserved_word(yyscanner); } |
| "static" { return reserved_word(yyscanner); } |
| "extern" { return reserved_word(yyscanner); } |
| "external" { return reserved_word(yyscanner); } |
| "interface" { return reserved_word(yyscanner); } |
| |
| "long" { return reserved_word(yyscanner); } |
| "short" { return reserved_word(yyscanner); } |
| "double" { return reserved_word(yyscanner); } |
| "half" { return reserved_word(yyscanner); } |
| "fixed" { return reserved_word(yyscanner); } |
| "unsigned" { return reserved_word(yyscanner); } |
| |
| "input" { return reserved_word(yyscanner); } |
| "output" { return reserved_word(yyscanner); } |
| |
| "hvec2" { return reserved_word(yyscanner); } |
| "hvec3" { return reserved_word(yyscanner); } |
| "hvec4" { return reserved_word(yyscanner); } |
| "fvec2" { return reserved_word(yyscanner); } |
| "fvec3" { return reserved_word(yyscanner); } |
| "fvec4" { return reserved_word(yyscanner); } |
| "dvec2" { return reserved_word(yyscanner); } |
| "dvec3" { return reserved_word(yyscanner); } |
| "dvec4" { return reserved_word(yyscanner); } |
| |
| "sizeof" { return reserved_word(yyscanner); } |
| "cast" { return reserved_word(yyscanner); } |
| |
| "namespace" { return reserved_word(yyscanner); } |
| "using" { return reserved_word(yyscanner); } |
| |
| {L}({L}|{D})* { |
| yylval->lex.string = NewPoolTString(yytext); |
| return check_type(yyscanner); |
| } |
| |
| 0[xX]{H}+ { yylval->lex.i = strtol(yytext, 0, 0); return(INTCONSTANT); } |
| 0{O}+ { yylval->lex.i = strtol(yytext, 0, 0); return(INTCONSTANT); } |
| 0{D}+ { context->error(yylineno, "Invalid Octal number.", yytext, "", ""); context->recover(); return 0;} |
| {D}+ { yylval->lex.i = strtol(yytext, 0, 0); return(INTCONSTANT); } |
| |
| {D}+{E} { yylval->lex.f = static_cast<float>(atof_dot(yytext)); return(FLOATCONSTANT); } |
| {D}+"."{D}*({E})? { yylval->lex.f = static_cast<float>(atof_dot(yytext)); return(FLOATCONSTANT); } |
| "."{D}+({E})? { yylval->lex.f = static_cast<float>(atof_dot(yytext)); return(FLOATCONSTANT); } |
| |
| "+=" { 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); } |
| ";" { context->lexAfterType = false; return(SEMICOLON); } |
| ("{"|"<%") { context->lexAfterType = false; return(LEFT_BRACE); } |
| ("}"|"%>") { return(RIGHT_BRACE); } |
| "," { if (context->inTypeParen) context->lexAfterType = false; return(COMMA); } |
| ":" { return(COLON); } |
| "=" { context->lexAfterType = false; return(EQUAL); } |
| "(" { context->lexAfterType = false; context->inTypeParen = true; return(LEFT_PAREN); } |
| ")" { context->inTypeParen = false; return(RIGHT_PAREN); } |
| ("["|"<:") { return(LEFT_BRACKET); } |
| ("]"|":>") { return(RIGHT_BRACKET); } |
| "." { BEGIN(FIELDS); 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); } |
| |
| <FIELDS>{L}({L}|{D})* { |
| BEGIN(INITIAL); |
| yylval->lex.string = NewPoolTString(yytext); |
| return FIELD_SELECTION; |
| } |
| <FIELDS>[ \t\v\f\r] {} |
| |
| [ \t\v\n\f\r] { } |
| <*><<EOF>> { context->AfterEOF = true; yyterminate(); } |
| <*>. { context->warning(yylineno, "Unknown char", yytext, ""); return 0; } |
| |
| %% |
| |
| extern "C" { |
| // Preprocessor interface. |
| #include "compiler/preprocessor/preprocess.h" |
| |
| #define SETUP_CONTEXT(pp) \ |
| TParseContext* context = (TParseContext*) pp->pC; \ |
| struct yyguts_t* yyg = (struct yyguts_t*) context->scanner; |
| |
| // Preprocessor callbacks. |
| void CPPDebugLogMsg(const char *msg) |
| { |
| SETUP_CONTEXT(cpp); |
| context->infoSink.debug.message(EPrefixNone, msg); |
| } |
| |
| void CPPWarningToInfoLog(const char *msg) |
| { |
| SETUP_CONTEXT(cpp); |
| context->warning(yylineno, msg, "", ""); |
| } |
| |
| void CPPShInfoLogMsg(const char *msg) |
| { |
| SETUP_CONTEXT(cpp); |
| context->error(yylineno, msg, "", ""); |
| context->recover(); |
| } |
| |
| void CPPErrorToInfoLog(char *msg) |
| { |
| SETUP_CONTEXT(cpp); |
| context->error(yylineno, msg, "", ""); |
| context->recover(); |
| } |
| |
| void SetLineNumber(int line) |
| { |
| SETUP_CONTEXT(cpp); |
| int string = 0; |
| DecodeSourceLoc(yylineno, &string, NULL); |
| yylineno = EncodeSourceLoc(string, line); |
| } |
| |
| void SetStringNumber(int string) |
| { |
| SETUP_CONTEXT(cpp); |
| int line = 0; |
| DecodeSourceLoc(yylineno, NULL, &line); |
| yylineno = EncodeSourceLoc(string, line); |
| } |
| |
| int GetStringNumber() |
| { |
| SETUP_CONTEXT(cpp); |
| int string = 0; |
| DecodeSourceLoc(yylineno, &string, NULL); |
| return string; |
| } |
| |
| int GetLineNumber() |
| { |
| SETUP_CONTEXT(cpp); |
| int line = 0; |
| DecodeSourceLoc(yylineno, NULL, &line); |
| return line; |
| } |
| |
| void IncLineNumber() |
| { |
| SETUP_CONTEXT(cpp); |
| int string = 0, line = 0; |
| DecodeSourceLoc(yylineno, &string, &line); |
| yylineno = EncodeSourceLoc(string, ++line); |
| } |
| |
| void DecLineNumber() |
| { |
| SETUP_CONTEXT(cpp); |
| int string = 0, line = 0; |
| DecodeSourceLoc(yylineno, &string, &line); |
| yylineno = EncodeSourceLoc(string, --line); |
| } |
| |
| void HandlePragma(const char **tokens, int numTokens) |
| { |
| SETUP_CONTEXT(cpp); |
| if (!strcmp(tokens[0], "optimize")) { |
| if (numTokens != 4) { |
| CPPShInfoLogMsg("optimize pragma syntax is incorrect"); |
| return; |
| } |
| |
| if (strcmp(tokens[1], "(")) { |
| CPPShInfoLogMsg("\"(\" expected after 'optimize' keyword"); |
| return; |
| } |
| |
| if (!strcmp(tokens[2], "on")) |
| context->contextPragma.optimize = true; |
| else if (!strcmp(tokens[2], "off")) |
| context->contextPragma.optimize = false; |
| else { |
| CPPShInfoLogMsg("\"on\" or \"off\" expected after '(' for 'optimize' pragma"); |
| return; |
| } |
| |
| if (strcmp(tokens[3], ")")) { |
| CPPShInfoLogMsg("\")\" expected to end 'optimize' pragma"); |
| return; |
| } |
| } else if (!strcmp(tokens[0], "debug")) { |
| if (numTokens != 4) { |
| CPPShInfoLogMsg("debug pragma syntax is incorrect"); |
| return; |
| } |
| |
| if (strcmp(tokens[1], "(")) { |
| CPPShInfoLogMsg("\"(\" expected after 'debug' keyword"); |
| return; |
| } |
| |
| if (!strcmp(tokens[2], "on")) |
| context->contextPragma.debug = true; |
| else if (!strcmp(tokens[2], "off")) |
| context->contextPragma.debug = false; |
| else { |
| CPPShInfoLogMsg("\"on\" or \"off\" expected after '(' for 'debug' pragma"); |
| return; |
| } |
| |
| if (strcmp(tokens[3], ")")) { |
| CPPShInfoLogMsg("\")\" expected to end 'debug' pragma"); |
| return; |
| } |
| } else { |
| #ifdef PRAGMA_TABLE |
| // |
| // implementation specific pragma |
| // use ((TParseContext *)cpp->pC)->contextPragma.pragmaTable to store the information about pragma |
| // For now, just ignore the pragma that the implementation cannot recognize |
| // An Example of one such implementation for a pragma that has a syntax like |
| // #pragma pragmaname(pragmavalue) |
| // This implementation stores the current pragmavalue against the pragma name in pragmaTable. |
| // |
| if (numTokens == 4 && !strcmp(tokens[1], "(") && !strcmp(tokens[3], ")")) { |
| TPragmaTable& pragmaTable = ((TParseContext *)cpp->pC)->contextPragma.pragmaTable; |
| TPragmaTable::iterator iter; |
| iter = pragmaTable.find(TString(tokens[0])); |
| if (iter != pragmaTable.end()) { |
| iter->second = tokens[2]; |
| } else { |
| pragmaTable[ tokens[0] ] = tokens[2]; |
| } |
| } else if (numTokens >= 2) { |
| TPragmaTable& pragmaTable = ((TParseContext *)cpp->pC)->contextPragma.pragmaTable; |
| TPragmaTable::iterator iter; |
| iter = pragmaTable.find(TString(tokens[0])); |
| if (iter != pragmaTable.end()) { |
| iter->second = tokens[1]; |
| } else { |
| pragmaTable[ tokens[0] ] = tokens[1]; |
| } |
| } |
| #endif // PRAGMA_TABLE |
| } |
| } |
| |
| void StoreStr(char *string) |
| { |
| SETUP_CONTEXT(cpp); |
| TString strSrc; |
| strSrc = TString(string); |
| |
| context->HashErrMsg = context->HashErrMsg + " " + strSrc; |
| } |
| |
| const char* GetStrfromTStr(void) |
| { |
| SETUP_CONTEXT(cpp); |
| cpp->ErrMsg = context->HashErrMsg.c_str(); |
| return cpp->ErrMsg; |
| } |
| |
| void ResetTString(void) |
| { |
| SETUP_CONTEXT(cpp); |
| context->HashErrMsg = ""; |
| } |
| |
| TBehavior GetBehavior(const char* behavior) |
| { |
| if (!strcmp("require", behavior)) |
| return EBhRequire; |
| else if (!strcmp("enable", behavior)) |
| return EBhEnable; |
| else if (!strcmp("disable", behavior)) |
| return EBhDisable; |
| else if (!strcmp("warn", behavior)) |
| return EBhWarn; |
| else { |
| CPPShInfoLogMsg((TString("behavior '") + behavior + "' is not supported").c_str()); |
| return EBhDisable; |
| } |
| } |
| |
| void updateExtensionBehavior(const char* extName, const char* behavior) |
| { |
| SETUP_CONTEXT(cpp); |
| TBehavior behaviorVal = GetBehavior(behavior); |
| TMap<TString, TBehavior>:: iterator iter; |
| TString msg; |
| |
| // special cased for all extension |
| if (!strcmp(extName, "all")) { |
| if (behaviorVal == EBhRequire || behaviorVal == EBhEnable) { |
| CPPShInfoLogMsg("extension 'all' cannot have 'require' or 'enable' behavior"); |
| return; |
| } else { |
| for (iter = context->extensionBehavior.begin(); iter != context->extensionBehavior.end(); ++iter) |
| iter->second = behaviorVal; |
| } |
| } else { |
| iter = context->extensionBehavior.find(TString(extName)); |
| if (iter == context->extensionBehavior.end()) { |
| switch (behaviorVal) { |
| case EBhRequire: |
| CPPShInfoLogMsg((TString("extension '") + extName + "' is not supported").c_str()); |
| break; |
| case EBhEnable: |
| case EBhWarn: |
| case EBhDisable: |
| msg = TString("extension '") + extName + "' is not supported"; |
| context->infoSink.info.message(EPrefixWarning, msg.c_str(), yylineno); |
| break; |
| } |
| return; |
| } else |
| iter->second = behaviorVal; |
| } |
| } |
| } // extern "C" |
| |
| int string_input(char* buf, int max_size, yyscan_t yyscanner) { |
| int len; |
| |
| if ((len = yylex_CPP(buf, max_size)) == 0) |
| return 0; |
| if (len >= max_size) |
| YY_FATAL_ERROR("input buffer overflow, can't enlarge buffer because scanner uses REJECT"); |
| |
| buf[len] = ' '; |
| return len+1; |
| } |
| |
| int check_type(yyscan_t yyscanner) { |
| struct yyguts_t* yyg = (struct yyguts_t*) yyscanner; |
| |
| int token = IDENTIFIER; |
| TSymbol* symbol = yyextra->symbolTable.find(yytext); |
| if (yyextra->lexAfterType == false && symbol && symbol->isVariable()) { |
| TVariable* variable = static_cast<TVariable*>(symbol); |
| if (variable->isUserType()) { |
| yyextra->lexAfterType = true; |
| 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(yylineno, "Illegal use of reserved word", yytext, ""); |
| yyextra->recover(); |
| return 0; |
| } |
| |
| void yyerror(TParseContext* context, const char* reason) { |
| struct yyguts_t* yyg = (struct yyguts_t*) context->scanner; |
| |
| if (context->AfterEOF) { |
| context->error(yylineno, reason, "unexpected EOF", ""); |
| } else { |
| context->error(yylineno, reason, yytext, ""); |
| } |
| context->recover(); |
| } |
| |
| 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; |
| return yylex_destroy(scanner); |
| } |
| |
| void glslang_scan(int count, const char* const string[], const int length[], |
| TParseContext* context) { |
| yyrestart(NULL, context->scanner); |
| yyset_lineno(EncodeSourceLoc(0, 1), context->scanner); |
| context->AfterEOF = false; |
| |
| // Init preprocessor. |
| cpp->pC = context; |
| cpp->PaWhichStr = 0; |
| cpp->PaArgv = string; |
| cpp->PaArgc = count; |
| cpp->PaStrLen = length; |
| cpp->pastFirstStatement = 0; |
| ScanFromString(string[0]); |
| } |
| |
