1%{ 2/* 3 * Copyright © 2008, 2009 Intel Corporation 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 * DEALINGS IN THE SOFTWARE. 23 */ 24#include <ctype.h> 25#include <limits.h> 26#include "strtod.h" 27#include "ast.h" 28#include "glsl_parser_extras.h" 29#include "glsl_parser.h" 30 31static int classify_identifier(struct _mesa_glsl_parse_state *, const char *); 32 33#ifdef _MSC_VER 34#define YY_NO_UNISTD_H 35#endif 36 37#define YY_USER_ACTION \ 38 do { \ 39 yylloc->source = 0; \ 40 yylloc->first_column = yycolumn + 1; \ 41 yylloc->first_line = yylineno + 1; \ 42 yycolumn += yyleng; \ 43 } while(0); 44 45#define YY_USER_INIT yylineno = 0; yycolumn = 0; 46 47/* A macro for handling reserved words and keywords across language versions. 48 * 49 * Certain words start out as identifiers, become reserved words in 50 * later language revisions, and finally become language keywords. 51 * 52 * For example, consider the following lexer rule: 53 * samplerBuffer KEYWORD(130, 140, SAMPLERBUFFER) 54 * 55 * This means that "samplerBuffer" will be treated as: 56 * - a keyword (SAMPLERBUFFER token) ...in GLSL >= 1.40 57 * - a reserved word - error ...in GLSL >= 1.30 58 * - an identifier ...in GLSL < 1.30 59 */ 60#define KEYWORD(reserved_version, allowed_version, token) \ 61 do { \ 62 if (yyextra->language_version >= allowed_version) { \ 63 return token; \ 64 } else if (yyextra->language_version >= reserved_version) { \ 65 _mesa_glsl_error(yylloc, yyextra, \ 66 "Illegal use of reserved word `%s'", yytext); \ 67 return ERROR_TOK; \ 68 } else { \ 69 yylval->identifier = strdup(yytext); \ 70 return classify_identifier(yyextra, yytext); \ 71 } \ 72 } while (0) 73 74/* The ES macro can be used in KEYWORD checks: 75 * 76 * word KEYWORD(110 || ES, 400, TOKEN) 77 * ...means the word is reserved in GLSL ES 1.00, while 78 * 79 * word KEYWORD(110, 130 || ES, TOKEN) 80 * ...means the word is a legal keyword in GLSL ES 1.00. 81 */ 82#define ES yyextra->es_shader 83 84static int 85literal_integer(char *text, int len, struct _mesa_glsl_parse_state *state, 86 YYSTYPE *lval, YYLTYPE *lloc, int base) 87{ 88 bool is_uint = (text[len - 1] == 'u' || 89 text[len - 1] == 'U'); 90 const char *digits = text; 91 92 /* Skip "0x" */ 93 if (base == 16) 94 digits += 2; 95 96#ifdef _MSC_VER 97 unsigned __int64 value = _strtoui64(digits, NULL, base); 98#else 99 unsigned long long value = strtoull(digits, NULL, base); 100#endif 101 102 lval->n = (int)value; 103 104 if (value > UINT_MAX) { 105 /* Note that signed 0xffffffff is valid, not out of range! */ 106 if (state->language_version >= 130) { 107 _mesa_glsl_error(lloc, state, 108 "Literal value `%s' out of range", text); 109 } else { 110 _mesa_glsl_warning(lloc, state, 111 "Literal value `%s' out of range", text); 112 } 113 } else if (base == 10 && !is_uint && (unsigned)value > (unsigned)INT_MAX + 1) { 114 /* Tries to catch unintentionally providing a negative value. 115 * Note that -2147483648 is parsed as -(2147483648), so we don't 116 * want to warn for INT_MAX. 117 */ 118 _mesa_glsl_warning(lloc, state, 119 "Signed literal value `%s' is interpreted as %d", 120 text, lval->n); 121 } 122 return is_uint ? UINTCONSTANT : INTCONSTANT; 123} 124 125#define LITERAL_INTEGER(base) \ 126 literal_integer(yytext, yyleng, yyextra, yylval, yylloc, base) 127 128%} 129 130%option bison-bridge bison-locations reentrant noyywrap 131%option nounput noyy_top_state 132%option never-interactive 133%option prefix="_mesa_glsl_" 134%option extra-type="struct _mesa_glsl_parse_state *" 135 136%x PP PRAGMA 137 138DEC_INT [1-9][0-9]* 139HEX_INT 0[xX][0-9a-fA-F]+ 140OCT_INT 0[0-7]* 141INT ({DEC_INT}|{HEX_INT}|{OCT_INT}) 142SPC [ \t]* 143SPCP [ \t]+ 144HASH ^{SPC}#{SPC} 145%% 146 147[ \r\t]+ ; 148 149 /* Preprocessor tokens. */ 150^[ \t]*#[ \t]*$ ; 151^[ \t]*#[ \t]*version { BEGIN PP; return VERSION_TOK; } 152^[ \t]*#[ \t]*extension { BEGIN PP; return EXTENSION; } 153{HASH}line{SPCP}{INT}{SPCP}{INT}{SPC}$ { 154 /* Eat characters until the first digit is 155 * encountered 156 */ 157 char *ptr = yytext; 158 while (!isdigit(*ptr)) 159 ptr++; 160 161 /* Subtract one from the line number because 162 * yylineno is zero-based instead of 163 * one-based. 164 */ 165 yylineno = strtol(ptr, &ptr, 0) - 1; 166 yylloc->source = strtol(ptr, NULL, 0); 167 } 168{HASH}line{SPCP}{INT}{SPC}$ { 169 /* Eat characters until the first digit is 170 * encountered 171 */ 172 char *ptr = yytext; 173 while (!isdigit(*ptr)) 174 ptr++; 175 176 /* Subtract one from the line number because 177 * yylineno is zero-based instead of 178 * one-based. 179 */ 180 yylineno = strtol(ptr, &ptr, 0) - 1; 181 } 182^{SPC}#{SPC}pragma{SPCP}debug{SPC}\({SPC}on{SPC}\) { 183 BEGIN PP; 184 return PRAGMA_DEBUG_ON; 185 } 186^{SPC}#{SPC}pragma{SPCP}debug{SPC}\({SPC}off{SPC}\) { 187 BEGIN PP; 188 return PRAGMA_DEBUG_OFF; 189 } 190^{SPC}#{SPC}pragma{SPCP}optimize{SPC}\({SPC}on{SPC}\) { 191 BEGIN PP; 192 return PRAGMA_OPTIMIZE_ON; 193 } 194^{SPC}#{SPC}pragma{SPCP}optimize{SPC}\({SPC}off{SPC}\) { 195 BEGIN PP; 196 return PRAGMA_OPTIMIZE_OFF; 197 } 198^{SPC}#{SPC}pragma{SPCP}STDGL{SPCP}invariant{SPC}\({SPC}all{SPC}\) { 199 BEGIN PP; 200 return PRAGMA_INVARIANT_ALL; 201 } 202^{SPC}#{SPC}pragma{SPCP} { BEGIN PRAGMA; } 203 204<PRAGMA>\n { BEGIN 0; yylineno++; yycolumn = 0; } 205<PRAGMA>. { } 206 207<PP>\/\/[^\n]* { } 208<PP>[ \t\r]* { } 209<PP>: return COLON; 210<PP>[_a-zA-Z][_a-zA-Z0-9]* { 211 yylval->identifier = strdup(yytext); 212 return IDENTIFIER; 213 } 214<PP>[1-9][0-9]* { 215 yylval->n = strtol(yytext, NULL, 10); 216 return INTCONSTANT; 217 } 218<PP>\n { BEGIN 0; yylineno++; yycolumn = 0; return EOL; } 219 220\n { yylineno++; yycolumn = 0; } 221 222attribute return ATTRIBUTE; 223const return CONST_TOK; 224bool return BOOL_TOK; 225float return FLOAT_TOK; 226int return INT_TOK; 227uint KEYWORD(130, 130, UINT_TOK); 228 229break return BREAK; 230continue return CONTINUE; 231do return DO; 232while return WHILE; 233else return ELSE; 234for return FOR; 235if return IF; 236discard return DISCARD; 237return return RETURN; 238 239bvec2 return BVEC2; 240bvec3 return BVEC3; 241bvec4 return BVEC4; 242ivec2 return IVEC2; 243ivec3 return IVEC3; 244ivec4 return IVEC4; 245uvec2 KEYWORD(130, 130, UVEC2); 246uvec3 KEYWORD(130, 130, UVEC3); 247uvec4 KEYWORD(130, 130, UVEC4); 248vec2 return VEC2; 249vec3 return VEC3; 250vec4 return VEC4; 251mat2 return MAT2X2; 252mat3 return MAT3X3; 253mat4 return MAT4X4; 254mat2x2 KEYWORD(120, 120, MAT2X2); 255mat2x3 KEYWORD(120, 120, MAT2X3); 256mat2x4 KEYWORD(120, 120, MAT2X4); 257mat3x2 KEYWORD(120, 120, MAT3X2); 258mat3x3 KEYWORD(120, 120, MAT3X3); 259mat3x4 KEYWORD(120, 120, MAT3X4); 260mat4x2 KEYWORD(120, 120, MAT4X2); 261mat4x3 KEYWORD(120, 120, MAT4X3); 262mat4x4 KEYWORD(120, 120, MAT4X4); 263 264in return IN_TOK; 265out return OUT_TOK; 266inout return INOUT_TOK; 267uniform return UNIFORM; 268varying return VARYING; 269centroid KEYWORD(120, 120, CENTROID); 270invariant KEYWORD(120 || ES, 120 || ES, INVARIANT); 271flat KEYWORD(130 || ES, 130, FLAT); 272smooth KEYWORD(130, 130, SMOOTH); 273noperspective KEYWORD(130, 130, NOPERSPECTIVE); 274 275sampler1D return SAMPLER1D; 276sampler2D return SAMPLER2D; 277sampler3D return SAMPLER3D; 278samplerCube return SAMPLERCUBE; 279sampler1DArray KEYWORD(130, 130, SAMPLER1DARRAY); 280sampler2DArray KEYWORD(130, 130, SAMPLER2DARRAY); 281sampler1DShadow return SAMPLER1DSHADOW; 282sampler2DShadow return SAMPLER2DSHADOW; 283samplerCubeShadow KEYWORD(130, 130, SAMPLERCUBESHADOW); 284sampler1DArrayShadow KEYWORD(130, 130, SAMPLER1DARRAYSHADOW); 285sampler2DArrayShadow KEYWORD(130, 130, SAMPLER2DARRAYSHADOW); 286isampler1D KEYWORD(130, 130, ISAMPLER1D); 287isampler2D KEYWORD(130, 130, ISAMPLER2D); 288isampler3D KEYWORD(130, 130, ISAMPLER3D); 289isamplerCube KEYWORD(130, 130, ISAMPLERCUBE); 290isampler1DArray KEYWORD(130, 130, ISAMPLER1DARRAY); 291isampler2DArray KEYWORD(130, 130, ISAMPLER2DARRAY); 292usampler1D KEYWORD(130, 130, USAMPLER1D); 293usampler2D KEYWORD(130, 130, USAMPLER2D); 294usampler3D KEYWORD(130, 130, USAMPLER3D); 295usamplerCube KEYWORD(130, 130, USAMPLERCUBE); 296usampler1DArray KEYWORD(130, 130, USAMPLER1DARRAY); 297usampler2DArray KEYWORD(130, 130, USAMPLER2DARRAY); 298 299samplerExternalOES { 300 if (yyextra->OES_EGL_image_external_enable) 301 return SAMPLEREXTERNALOES; 302 else 303 return IDENTIFIER; 304 } 305 306 307struct return STRUCT; 308void return VOID_TOK; 309 310layout { 311 if ((yyextra->language_version >= 140) 312 || yyextra->AMD_conservative_depth_enable 313 || yyextra->ARB_conservative_depth_enable 314 || yyextra->ARB_explicit_attrib_location_enable 315 || yyextra->ARB_uniform_buffer_object_enable 316 || yyextra->ARB_fragment_coord_conventions_enable) { 317 return LAYOUT_TOK; 318 } else { 319 yylval->identifier = strdup(yytext); 320 return IDENTIFIER; 321 } 322 } 323 324\+\+ return INC_OP; 325-- return DEC_OP; 326\<= return LE_OP; 327>= return GE_OP; 328== return EQ_OP; 329!= return NE_OP; 330&& return AND_OP; 331\|\| return OR_OP; 332"^^" return XOR_OP; 333"<<" return LEFT_OP; 334">>" return RIGHT_OP; 335 336\*= return MUL_ASSIGN; 337\/= return DIV_ASSIGN; 338\+= return ADD_ASSIGN; 339\%= return MOD_ASSIGN; 340\<\<= return LEFT_ASSIGN; 341>>= return RIGHT_ASSIGN; 342&= return AND_ASSIGN; 343"^=" return XOR_ASSIGN; 344\|= return OR_ASSIGN; 345-= return SUB_ASSIGN; 346 347[1-9][0-9]*[uU]? { 348 return LITERAL_INTEGER(10); 349 } 3500[xX][0-9a-fA-F]+[uU]? { 351 return LITERAL_INTEGER(16); 352 } 3530[0-7]*[uU]? { 354 return LITERAL_INTEGER(8); 355 } 356 357[0-9]+\.[0-9]+([eE][+-]?[0-9]+)?[fF]? { 358 yylval->real = glsl_strtod(yytext, NULL); 359 return FLOATCONSTANT; 360 } 361\.[0-9]+([eE][+-]?[0-9]+)?[fF]? { 362 yylval->real = glsl_strtod(yytext, NULL); 363 return FLOATCONSTANT; 364 } 365[0-9]+\.([eE][+-]?[0-9]+)?[fF]? { 366 yylval->real = glsl_strtod(yytext, NULL); 367 return FLOATCONSTANT; 368 } 369[0-9]+[eE][+-]?[0-9]+[fF]? { 370 yylval->real = glsl_strtod(yytext, NULL); 371 return FLOATCONSTANT; 372 } 373[0-9]+[fF] { 374 yylval->real = glsl_strtod(yytext, NULL); 375 return FLOATCONSTANT; 376 } 377 378true { 379 yylval->n = 1; 380 return BOOLCONSTANT; 381 } 382false { 383 yylval->n = 0; 384 return BOOLCONSTANT; 385 } 386 387 388 /* Reserved words in GLSL 1.10. */ 389asm KEYWORD(110 || ES, 999, ASM); 390class KEYWORD(110 || ES, 999, CLASS); 391union KEYWORD(110 || ES, 999, UNION); 392enum KEYWORD(110 || ES, 999, ENUM); 393typedef KEYWORD(110 || ES, 999, TYPEDEF); 394template KEYWORD(110 || ES, 999, TEMPLATE); 395this KEYWORD(110 || ES, 999, THIS); 396packed KEYWORD(110 || ES, 140 || yyextra->ARB_uniform_buffer_object_enable, PACKED_TOK); 397goto KEYWORD(110 || ES, 999, GOTO); 398switch KEYWORD(110 || ES, 130, SWITCH); 399default KEYWORD(110 || ES, 130, DEFAULT); 400inline KEYWORD(110 || ES, 999, INLINE_TOK); 401noinline KEYWORD(110 || ES, 999, NOINLINE); 402volatile KEYWORD(110 || ES, 999, VOLATILE); 403public KEYWORD(110 || ES, 999, PUBLIC_TOK); 404static KEYWORD(110 || ES, 999, STATIC); 405extern KEYWORD(110 || ES, 999, EXTERN); 406external KEYWORD(110 || ES, 999, EXTERNAL); 407interface KEYWORD(110 || ES, 999, INTERFACE); 408long KEYWORD(110 || ES, 999, LONG_TOK); 409short KEYWORD(110 || ES, 999, SHORT_TOK); 410double KEYWORD(110 || ES, 400, DOUBLE_TOK); 411half KEYWORD(110 || ES, 999, HALF); 412fixed KEYWORD(110 || ES, 999, FIXED_TOK); 413unsigned KEYWORD(110 || ES, 999, UNSIGNED); 414input KEYWORD(110 || ES, 999, INPUT_TOK); 415output KEYWORD(110 || ES, 999, OUTPUT); 416hvec2 KEYWORD(110 || ES, 999, HVEC2); 417hvec3 KEYWORD(110 || ES, 999, HVEC3); 418hvec4 KEYWORD(110 || ES, 999, HVEC4); 419dvec2 KEYWORD(110 || ES, 400, DVEC2); 420dvec3 KEYWORD(110 || ES, 400, DVEC3); 421dvec4 KEYWORD(110 || ES, 400, DVEC4); 422fvec2 KEYWORD(110 || ES, 999, FVEC2); 423fvec3 KEYWORD(110 || ES, 999, FVEC3); 424fvec4 KEYWORD(110 || ES, 999, FVEC4); 425sampler2DRect return SAMPLER2DRECT; 426sampler3DRect KEYWORD(110 || ES, 999, SAMPLER3DRECT); 427sampler2DRectShadow return SAMPLER2DRECTSHADOW; 428sizeof KEYWORD(110 || ES, 999, SIZEOF); 429cast KEYWORD(110 || ES, 999, CAST); 430namespace KEYWORD(110 || ES, 999, NAMESPACE); 431using KEYWORD(110 || ES, 999, USING); 432 433 /* Additional reserved words in GLSL 1.20. */ 434lowp KEYWORD(120, 130 || ES, LOWP); 435mediump KEYWORD(120, 130 || ES, MEDIUMP); 436highp KEYWORD(120, 130 || ES, HIGHP); 437precision KEYWORD(120, 130 || ES, PRECISION); 438 439 /* Additional reserved words in GLSL 1.30. */ 440case KEYWORD(130, 130, CASE); 441common KEYWORD(130, 999, COMMON); 442partition KEYWORD(130, 999, PARTITION); 443active KEYWORD(130, 999, ACTIVE); 444superp KEYWORD(130 || ES, 999, SUPERP); 445samplerBuffer KEYWORD(130, 140, SAMPLERBUFFER); 446filter KEYWORD(130, 999, FILTER); 447image1D KEYWORD(130, 999, IMAGE1D); 448image2D KEYWORD(130, 999, IMAGE2D); 449image3D KEYWORD(130, 999, IMAGE3D); 450imageCube KEYWORD(130, 999, IMAGECUBE); 451iimage1D KEYWORD(130, 999, IIMAGE1D); 452iimage2D KEYWORD(130, 999, IIMAGE2D); 453iimage3D KEYWORD(130, 999, IIMAGE3D); 454iimageCube KEYWORD(130, 999, IIMAGECUBE); 455uimage1D KEYWORD(130, 999, UIMAGE1D); 456uimage2D KEYWORD(130, 999, UIMAGE2D); 457uimage3D KEYWORD(130, 999, UIMAGE3D); 458uimageCube KEYWORD(130, 999, UIMAGECUBE); 459image1DArray KEYWORD(130, 999, IMAGE1DARRAY); 460image2DArray KEYWORD(130, 999, IMAGE2DARRAY); 461iimage1DArray KEYWORD(130, 999, IIMAGE1DARRAY); 462iimage2DArray KEYWORD(130, 999, IIMAGE2DARRAY); 463uimage1DArray KEYWORD(130, 999, UIMAGE1DARRAY); 464uimage2DArray KEYWORD(130, 999, UIMAGE2DARRAY); 465image1DShadow KEYWORD(130, 999, IMAGE1DSHADOW); 466image2DShadow KEYWORD(130, 999, IMAGE2DSHADOW); 467image1DArrayShadow KEYWORD(130, 999, IMAGE1DARRAYSHADOW); 468image2DArrayShadow KEYWORD(130, 999, IMAGE2DARRAYSHADOW); 469imageBuffer KEYWORD(130, 999, IMAGEBUFFER); 470iimageBuffer KEYWORD(130, 999, IIMAGEBUFFER); 471uimageBuffer KEYWORD(130, 999, UIMAGEBUFFER); 472row_major KEYWORD(130, 140 || yyextra->ARB_uniform_buffer_object_enable, ROW_MAJOR); 473 474 /* Additional reserved words in GLSL 1.40 */ 475isampler2DRect KEYWORD(140, 140, ISAMPLER2DRECT); 476usampler2DRect KEYWORD(140, 140, USAMPLER2DRECT); 477isamplerBuffer KEYWORD(140, 140, ISAMPLERBUFFER); 478usamplerBuffer KEYWORD(140, 140, USAMPLERBUFFER); 479 480[_a-zA-Z][_a-zA-Z0-9]* { 481 struct _mesa_glsl_parse_state *state = yyextra; 482 void *ctx = state; 483 yylval->identifier = ralloc_strdup(ctx, yytext); 484 return classify_identifier(state, yytext); 485 } 486 487. { return yytext[0]; } 488 489%% 490 491int 492classify_identifier(struct _mesa_glsl_parse_state *state, const char *name) 493{ 494 if (state->symbols->get_variable(name) || state->symbols->get_function(name)) 495 return IDENTIFIER; 496 else if (state->symbols->get_type(name)) 497 return TYPE_IDENTIFIER; 498 else 499 return NEW_IDENTIFIER; 500} 501 502void 503_mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state, const char *string) 504{ 505 yylex_init_extra(state, & state->scanner); 506 yy_scan_string(string, state->scanner); 507} 508 509void 510_mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state) 511{ 512 yylex_destroy(state->scanner); 513} 514