xserver and mesa git update 28-12-2010

1 files changed, 1588 insertions, 1588 deletions

diff --git a/mesalib/src/mesa/program/nvfragparse.c b/mesalib/src/mesa/program/nvfragparse.c
index 0de3c5804..04538e071 100644
--- a/mesalib/src/mesa/program/nvfragparse.c
+++ b/mesalib/src/mesa/program/nvfragparse.c
@@ -1,1588 +1,1588 @@
-/*
- * Mesa 3-D graphics library
- * Version:  6.5
- *
- * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/**
- * \file nvfragparse.c
- * NVIDIA fragment program parser.
- * \author Brian Paul
- */
-
-/*
- * Regarding GL_NV_fragment_program:
- *
- * Portions of this software may use or implement intellectual
- * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims
- * any and all warranties with respect to such intellectual property,
- * including any use thereof or modifications thereto.
- */
-
-#include "main/glheader.h"
-#include "main/context.h"
-#include "main/imports.h"
-#include "main/macros.h"
-#include "program.h"
-#include "prog_parameter.h"
-#include "prog_print.h"
-#include "prog_instruction.h"
-#include "nvfragparse.h"
-
-
-#define INPUT_1V     1
-#define INPUT_2V     2
-#define INPUT_3V     3
-#define INPUT_1S     4
-#define INPUT_2S     5
-#define INPUT_CC     6
-#define INPUT_1V_T   7  /* one source vector, plus textureId */
-#define INPUT_3V_T   8  /* one source vector, plus textureId */
-#define INPUT_NONE   9
-#define INPUT_1V_S  10  /* a string and a vector register */
-#define OUTPUT_V    20
-#define OUTPUT_S    21
-#define OUTPUT_NONE 22
-
-/* IRIX defines some of these */
-#undef _R
-#undef _H
-#undef _X
-#undef _C
-#undef _S
-
-/* Optional suffixes */
-#define _R  FLOAT32  /* float */
-#define _H  FLOAT16  /* half-float */
-#define _X  FIXED12  /* fixed */
-#define _C  0x08     /* set cond codes */
-#define _S  0x10     /* saturate, clamp result to [0,1] */
-
-struct instruction_pattern {
-   const char *name;
-   enum prog_opcode opcode;
-   GLuint inputs;
-   GLuint outputs;
-   GLuint suffixes;
-};
-
-static const struct instruction_pattern Instructions[] = {
-   { "ADD", OPCODE_ADD, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "COS", OPCODE_COS, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
-   { "DDX", OPCODE_DDX, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },
-   { "DDY", OPCODE_DDY, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },
-   { "DP3", OPCODE_DP3, INPUT_2V, OUTPUT_S, _R | _H | _X | _C | _S },
-   { "DP4", OPCODE_DP4, INPUT_2V, OUTPUT_S, _R | _H | _X | _C | _S },
-   { "DST", OPCODE_DP4, INPUT_2V, OUTPUT_V, _R | _H |      _C | _S },
-   { "EX2", OPCODE_DP4, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
-   { "FLR", OPCODE_FLR, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "FRC", OPCODE_FRC, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "KIL", OPCODE_KIL_NV, INPUT_CC, OUTPUT_NONE, 0                },
-   { "LG2", OPCODE_LG2, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
-   { "LIT", OPCODE_LIT, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },
-   { "LRP", OPCODE_LRP, INPUT_3V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "MAD", OPCODE_MAD, INPUT_3V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "MAX", OPCODE_MAX, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "MIN", OPCODE_MIN, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "MOV", OPCODE_MOV, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "MUL", OPCODE_MUL, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "PK2H",  OPCODE_PK2H,  INPUT_1V, OUTPUT_S, 0                  },
-   { "PK2US", OPCODE_PK2US, INPUT_1V, OUTPUT_S, 0                  },
-   { "PK4B",  OPCODE_PK4B,  INPUT_1V, OUTPUT_S, 0                  },
-   { "PK4UB", OPCODE_PK4UB, INPUT_1V, OUTPUT_S, 0                  },
-   { "POW", OPCODE_POW, INPUT_2S, OUTPUT_S, _R | _H |      _C | _S },
-   { "RCP", OPCODE_RCP, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
-   { "RFL", OPCODE_RFL, INPUT_2V, OUTPUT_V, _R | _H |      _C | _S },
-   { "RSQ", OPCODE_RSQ, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
-   { "SEQ", OPCODE_SEQ, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "SFL", OPCODE_SFL, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "SGE", OPCODE_SGE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "SGT", OPCODE_SGT, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "SIN", OPCODE_SIN, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },
-   { "SLE", OPCODE_SLE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "SLT", OPCODE_SLT, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "SNE", OPCODE_SNE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "STR", OPCODE_STR, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "SUB", OPCODE_SUB, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },
-   { "TEX", OPCODE_TEX, INPUT_1V_T, OUTPUT_V,              _C | _S },
-   { "TXD", OPCODE_TXD, INPUT_3V_T, OUTPUT_V,              _C | _S },
-   { "TXP", OPCODE_TXP_NV, INPUT_1V_T, OUTPUT_V,           _C | _S },
-   { "UP2H",  OPCODE_UP2H,  INPUT_1S, OUTPUT_V,            _C | _S },
-   { "UP2US", OPCODE_UP2US, INPUT_1S, OUTPUT_V,            _C | _S },
-   { "UP4B",  OPCODE_UP4B,  INPUT_1S, OUTPUT_V,            _C | _S },
-   { "UP4UB", OPCODE_UP4UB, INPUT_1S, OUTPUT_V,            _C | _S },
-   { "X2D", OPCODE_X2D, INPUT_3V, OUTPUT_V, _R | _H |      _C | _S },
-   { "PRINT", OPCODE_PRINT, INPUT_1V_S, OUTPUT_NONE, 0               },
-   { NULL, (enum prog_opcode) -1, 0, 0, 0 }
-};
-
-
-/*
- * Information needed or computed during parsing.
- * Remember, we can't modify the target program object until we've
- * _successfully_ parsed the program text.
- */
-struct parse_state {
-   GLcontext *ctx;
-   const GLubyte *start;              /* start of program string */
-   const GLubyte *pos;                /* current position */
-   const GLubyte *curLine;
-   struct gl_fragment_program *program;  /* current program */
-
-   struct gl_program_parameter_list *parameters;
-
-   GLuint numInst;                    /* number of instructions parsed */
-   GLuint inputsRead;                 /* bitmask of input registers used */
-   GLuint outputsWritten;             /* bitmask of 1 << FRAG_OUTPUT_* bits */
-   GLuint texturesUsed[MAX_TEXTURE_IMAGE_UNITS];
-};
-
-
-
-/*
- * Called whenever we find an error during parsing.
- */
-static void
-record_error(struct parse_state *parseState, const char *msg, int lineNo)
-{
-#ifdef DEBUG
-   GLint line, column;
-   const GLubyte *lineStr;
-   lineStr = _mesa_find_line_column(parseState->start,
-                                    parseState->pos, &line, &column);
-   _mesa_debug(parseState->ctx,
-               "nvfragparse.c(%d): line %d, column %d:%s (%s)\n",
-               lineNo, line, column, (char *) lineStr, msg);
-   free((void *) lineStr);
-#else
-   (void) lineNo;
-#endif
-
-   /* Check that no error was already recorded.  Only record the first one. */
-   if (parseState->ctx->Program.ErrorString[0] == 0) {
-      _mesa_set_program_error(parseState->ctx,
-                              parseState->pos - parseState->start,
-                              msg);
-   }
-}
-
-
-#define RETURN_ERROR							\
-do {									\
-   record_error(parseState, "Unexpected end of input.", __LINE__);	\
-   return GL_FALSE;							\
-} while(0)
-
-#define RETURN_ERROR1(msg)						\
-do {									\
-   record_error(parseState, msg, __LINE__);				\
-   return GL_FALSE;							\
-} while(0)
-
-#define RETURN_ERROR2(msg1, msg2)					\
-do {									\
-   char err[1000];							\
-   sprintf(err, "%s %s", msg1, msg2);				\
-   record_error(parseState, err, __LINE__);				\
-   return GL_FALSE;							\
-} while(0)
-
-
-
-
-/*
- * Search a list of instruction structures for a match.
- */
-static struct instruction_pattern
-MatchInstruction(const GLubyte *token)
-{
-   const struct instruction_pattern *inst;
-   struct instruction_pattern result;
-
-   result.name = NULL;
-   result.opcode = MAX_OPCODE; /* i.e. invalid instruction */
-   result.inputs = 0;
-   result.outputs = 0;
-   result.suffixes = 0;
-
-   for (inst = Instructions; inst->name; inst++) {
-      if (strncmp((const char *) token, inst->name, 3) == 0) {
-         /* matched! */
-         int i = 3;
-         result = *inst;
-         result.suffixes = 0;
-         /* look at suffix */
-         if (token[i] == 'R') {
-            result.suffixes |= _R;
-            i++;
-         }
-         else if (token[i] == 'H') {
-            result.suffixes |= _H;
-            i++;
-         }
-         else if (token[i] == 'X') {
-            result.suffixes |= _X;
-            i++;
-         }
-         if (token[i] == 'C') {
-            result.suffixes |= _C;
-            i++;
-         }
-         if (token[i] == '_' && token[i+1] == 'S' &&
-             token[i+2] == 'A' && token[i+3] == 'T') {
-            result.suffixes |= _S;
-         }
-         return result;
-      }
-   }
-
-   return result;
-}
-
-
-
-
-/**********************************************************************/
-
-
-static GLboolean IsLetter(GLubyte b)
-{
-   return (b >= 'a' && b <= 'z') ||
-          (b >= 'A' && b <= 'Z') ||
-          (b == '_') ||
-          (b == '$');
-}
-
-
-static GLboolean IsDigit(GLubyte b)
-{
-   return b >= '0' && b <= '9';
-}
-
-
-static GLboolean IsWhitespace(GLubyte b)
-{
-   return b == ' ' || b == '\t' || b == '\n' || b == '\r';
-}
-
-
-/**
- * Starting at 'str' find the next token.  A token can be an integer,
- * an identifier or punctuation symbol.
- * \return <= 0 we found an error, else, return number of characters parsed.
- */
-static GLint
-GetToken(struct parse_state *parseState, GLubyte *token)
-{
-   const GLubyte *str = parseState->pos;
-   GLint i = 0, j = 0;
-
-   token[0] = 0;
-
-   /* skip whitespace and comments */
-   while (str[i] && (IsWhitespace(str[i]) || str[i] == '#')) {
-      if (str[i] == '#') {
-         /* skip comment */
-         while (str[i] && (str[i] != '\n' && str[i] != '\r')) {
-            i++;
-         }
-         if (str[i] == '\n' || str[i] == '\r')
-            parseState->curLine = str + i + 1;
-      }
-      else {
-         /* skip whitespace */
-         if (str[i] == '\n' || str[i] == '\r')
-            parseState->curLine = str + i + 1;
-         i++;
-      }
-   }
-
-   if (str[i] == 0)
-      return -i;
-
-   /* try matching an integer */
-   while (str[i] && IsDigit(str[i])) {
-      token[j++] = str[i++];
-   }
-   if (j > 0 || !str[i]) {
-      token[j] = 0;
-      return i;
-   }
-
-   /* try matching an identifier */
-   if (IsLetter(str[i])) {
-      while (str[i] && (IsLetter(str[i]) || IsDigit(str[i]))) {
-         token[j++] = str[i++];
-      }
-      token[j] = 0;
-      return i;
-   }
-
-   /* punctuation character */
-   if (str[i]) {
-      token[0] = str[i++];
-      token[1] = 0;
-      return i;
-   }
-
-   /* end of input */
-   token[0] = 0;
-   return i;
-}
-
-
-/**
- * Get next token from input stream and increment stream pointer past token.
- */
-static GLboolean
-Parse_Token(struct parse_state *parseState, GLubyte *token)
-{
-   GLint i;
-   i = GetToken(parseState, token);
-   if (i <= 0) {
-      parseState->pos += (-i);
-      return GL_FALSE;
-   }
-   parseState->pos += i;
-   return GL_TRUE;
-}
-
-
-/**
- * Get next token from input stream but don't increment stream pointer.
- */
-static GLboolean
-Peek_Token(struct parse_state *parseState, GLubyte *token)
-{
-   GLint i, len;
-   i = GetToken(parseState, token);
-   if (i <= 0) {
-      parseState->pos += (-i);
-      return GL_FALSE;
-   }
-   len = (GLint) strlen((const char *) token);
-   parseState->pos += (i - len);
-   return GL_TRUE;
-}
-
-
-/**********************************************************************/
-
-static const char *InputRegisters[MAX_NV_FRAGMENT_PROGRAM_INPUTS + 1] = {
-   "WPOS", "COL0", "COL1", "FOGC",
-   "TEX0", "TEX1", "TEX2", "TEX3", "TEX4", "TEX5", "TEX6", "TEX7", NULL
-};
-
-
-
-/**********************************************************************/
-
-/**
- * Try to match 'pattern' as the next token after any whitespace/comments.
- */
-static GLboolean
-Parse_String(struct parse_state *parseState, const char *pattern)
-{
-   const GLubyte *m;
-   GLint i;
-
-   /* skip whitespace and comments */
-   while (IsWhitespace(*parseState->pos) || *parseState->pos == '#') {
-      if (*parseState->pos == '#') {
-         while (*parseState->pos && (*parseState->pos != '\n' && *parseState->pos != '\r')) {
-            parseState->pos += 1;
-         }
-         if (*parseState->pos == '\n' || *parseState->pos == '\r')
-            parseState->curLine = parseState->pos + 1;
-      }
-      else {
-         /* skip whitespace */
-         if (*parseState->pos == '\n' || *parseState->pos == '\r')
-            parseState->curLine = parseState->pos + 1;
-         parseState->pos += 1;
-      }
-   }
-
-   /* Try to match the pattern */
-   m = parseState->pos;
-   for (i = 0; pattern[i]; i++) {
-      if (*m != (GLubyte) pattern[i])
-         return GL_FALSE;
-      m += 1;
-   }
-   parseState->pos = m;
-
-   return GL_TRUE; /* success */
-}
-
-
-static GLboolean
-Parse_Identifier(struct parse_state *parseState, GLubyte *ident)
-{
-   if (!Parse_Token(parseState, ident))
-      RETURN_ERROR;
-   if (IsLetter(ident[0]))
-      return GL_TRUE;
-   else
-      RETURN_ERROR1("Expected an identfier");
-}
-
-
-/**
- * Parse a floating point constant, or a defined symbol name.
- * [+/-]N[.N[eN]]
- * Output:  number[0 .. 3] will get the value.
- */
-static GLboolean
-Parse_ScalarConstant(struct parse_state *parseState, GLfloat *number)
-{
-   char *end = NULL;
-
-   *number = (GLfloat) _mesa_strtof((const char *) parseState->pos, &end);
-
-   if (end && end > (char *) parseState->pos) {
-      /* got a number */
-      parseState->pos = (GLubyte *) end;
-      number[1] = *number;
-      number[2] = *number;
-      number[3] = *number;
-      return GL_TRUE;
-   }
-   else {
-      /* should be an identifier */
-      GLubyte ident[100];
-      const GLfloat *constant;
-      if (!Parse_Identifier(parseState, ident))
-         RETURN_ERROR1("Expected an identifier");
-      constant = _mesa_lookup_parameter_value(parseState->parameters,
-                                              -1, (const char *) ident);
-      /* XXX Check that it's a constant and not a parameter */
-      if (!constant) {
-         RETURN_ERROR1("Undefined symbol");
-      }
-      else {
-         COPY_4V(number, constant);
-         return GL_TRUE;
-      }
-   }
-}
-
-
-
-/**
- * Parse a vector constant, one of:
- *   { float }
- *   { float, float }
- *   { float, float, float }
- *   { float, float, float, float }
- */
-static GLboolean
-Parse_VectorConstant(struct parse_state *parseState, GLfloat *vec)
-{
-   /* "{" was already consumed */
-
-   ASSIGN_4V(vec, 0.0, 0.0, 0.0, 1.0);
-
-   if (!Parse_ScalarConstant(parseState, vec+0))  /* X */
-      return GL_FALSE;
-
-   if (Parse_String(parseState, "}")) {
-      return GL_TRUE;
-   }
-
-   if (!Parse_String(parseState, ","))
-      RETURN_ERROR1("Expected comma in vector constant");
-
-   if (!Parse_ScalarConstant(parseState, vec+1))  /* Y */
-      return GL_FALSE;
-
-   if (Parse_String(parseState, "}")) {
-      return GL_TRUE;
-   }
-
-   if (!Parse_String(parseState, ","))
-      RETURN_ERROR1("Expected comma in vector constant");
-
-   if (!Parse_ScalarConstant(parseState, vec+2))  /* Z */
-      return GL_FALSE;
-
-   if (Parse_String(parseState, "}")) {
-      return GL_TRUE;
-   }
-
-   if (!Parse_String(parseState, ","))
-      RETURN_ERROR1("Expected comma in vector constant");
-
-   if (!Parse_ScalarConstant(parseState, vec+3))  /* W */
-      return GL_FALSE;
-
-   if (!Parse_String(parseState, "}"))
-      RETURN_ERROR1("Expected closing brace in vector constant");
-
-   return GL_TRUE;
-}
-
-
-/**
- * Parse <number>, <varname> or {a, b, c, d}.
- * Return number of values in the vector or scalar, or zero if parse error.
- */
-static GLuint
-Parse_VectorOrScalarConstant(struct parse_state *parseState, GLfloat *vec)
-{
-   if (Parse_String(parseState, "{")) {
-      return Parse_VectorConstant(parseState, vec);
-   }
-   else {
-      GLboolean b = Parse_ScalarConstant(parseState, vec);
-      if (b) {
-         vec[1] = vec[2] = vec[3] = vec[0];
-      }
-      return b;
-   }
-}
-
-
-/**
- * Parse a texture image source:
- *    [TEX0 | TEX1 | .. | TEX15] , [1D | 2D | 3D | CUBE | RECT]
- */
-static GLboolean
-Parse_TextureImageId(struct parse_state *parseState,
-                     GLubyte *texUnit, GLubyte *texTargetBit)
-{
-   GLubyte imageSrc[100];
-   GLint unit;
-
-   if (!Parse_Token(parseState, imageSrc))
-      RETURN_ERROR;
-   
-   if (imageSrc[0] != 'T' ||
-       imageSrc[1] != 'E' ||
-       imageSrc[2] != 'X') {
-      RETURN_ERROR1("Expected TEX# source");
-   }
-   unit = atoi((const char *) imageSrc + 3);
-   if ((unit < 0 || unit > MAX_TEXTURE_IMAGE_UNITS) ||
-       (unit == 0 && (imageSrc[3] != '0' || imageSrc[4] != 0))) {
-      RETURN_ERROR1("Invalied TEX# source index");
-   }
-   *texUnit = unit;
-
-   if (!Parse_String(parseState, ","))
-      RETURN_ERROR1("Expected ,");
-
-   if (Parse_String(parseState, "1D")) {
-      *texTargetBit = TEXTURE_1D_BIT;
-   }
-   else if (Parse_String(parseState, "2D")) {
-      *texTargetBit = TEXTURE_2D_BIT;
-   }
-   else if (Parse_String(parseState, "3D")) {
-      *texTargetBit = TEXTURE_3D_BIT;
-   }
-   else if (Parse_String(parseState, "CUBE")) {
-      *texTargetBit = TEXTURE_CUBE_BIT;
-   }
-   else if (Parse_String(parseState, "RECT")) {
-      *texTargetBit = TEXTURE_RECT_BIT;
-   }
-   else {
-      RETURN_ERROR1("Invalid texture target token");
-   }
-
-   /* update record of referenced texture units */
-   parseState->texturesUsed[*texUnit] |= *texTargetBit;
-   if (_mesa_bitcount(parseState->texturesUsed[*texUnit]) > 1) {
-      RETURN_ERROR1("Only one texture target can be used per texture unit.");
-   }
-
-   return GL_TRUE;
-}
-
-
-/**
- * Parse a scalar suffix like .x, .y, .z or .w or parse a swizzle suffix
- * like .wxyz, .xxyy, etc and return the swizzle indexes.
- */
-static GLboolean
-Parse_SwizzleSuffix(const GLubyte *token, GLuint swizzle[4])
-{
-   if (token[1] == 0) {
-      /* single letter swizzle (scalar) */
-      if (token[0] == 'x')
-         ASSIGN_4V(swizzle, 0, 0, 0, 0);
-      else if (token[0] == 'y')
-         ASSIGN_4V(swizzle, 1, 1, 1, 1);
-      else if (token[0] == 'z')
-         ASSIGN_4V(swizzle, 2, 2, 2, 2);
-      else if (token[0] == 'w')
-         ASSIGN_4V(swizzle, 3, 3, 3, 3);
-      else
-         return GL_FALSE;
-   }
-   else {
-      /* 4-component swizzle (vector) */
-      GLint k;
-      for (k = 0; k < 4 && token[k]; k++) {
-         if (token[k] == 'x')
-            swizzle[k] = 0;
-         else if (token[k] == 'y')
-            swizzle[k] = 1;
-         else if (token[k] == 'z')
-            swizzle[k] = 2;
-         else if (token[k] == 'w')
-            swizzle[k] = 3;
-         else
-            return GL_FALSE;
-      }
-      if (k != 4)
-         return GL_FALSE;
-   }
-   return GL_TRUE;
-}
-
-
-static GLboolean
-Parse_CondCodeMask(struct parse_state *parseState,
-                   struct prog_dst_register *dstReg)
-{
-   if (Parse_String(parseState, "EQ"))
-      dstReg->CondMask = COND_EQ;
-   else if (Parse_String(parseState, "GE"))
-      dstReg->CondMask = COND_GE;
-   else if (Parse_String(parseState, "GT"))
-      dstReg->CondMask = COND_GT;
-   else if (Parse_String(parseState, "LE"))
-      dstReg->CondMask = COND_LE;
-   else if (Parse_String(parseState, "LT"))
-      dstReg->CondMask = COND_LT;
-   else if (Parse_String(parseState, "NE"))
-      dstReg->CondMask = COND_NE;
-   else if (Parse_String(parseState, "TR"))
-      dstReg->CondMask = COND_TR;
-   else if (Parse_String(parseState, "FL"))
-      dstReg->CondMask = COND_FL;
-   else
-      RETURN_ERROR1("Invalid condition code mask");
-
-   /* look for optional .xyzw swizzle */
-   if (Parse_String(parseState, ".")) {
-      GLubyte token[100];
-      GLuint swz[4];
-
-      if (!Parse_Token(parseState, token))  /* get xyzw suffix */
-         RETURN_ERROR;
-
-      if (!Parse_SwizzleSuffix(token, swz))
-         RETURN_ERROR1("Invalid swizzle suffix");
-
-      dstReg->CondSwizzle = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);
-   }
-
-   return GL_TRUE;
-}
-
-
-/**
- * Parse a temporary register: Rnn or Hnn
- */
-static GLboolean
-Parse_TempReg(struct parse_state *parseState, GLint *tempRegNum)
-{
-   GLubyte token[100];
-
-   /* Should be 'R##' or 'H##' */
-   if (!Parse_Token(parseState, token))
-      RETURN_ERROR;
-   if (token[0] != 'R' && token[0] != 'H')
-      RETURN_ERROR1("Expected R## or H##");
-
-   if (IsDigit(token[1])) {
-      GLint reg = atoi((const char *) (token + 1));
-      if (token[0] == 'H')
-         reg += 32;
-      if (reg >= MAX_NV_FRAGMENT_PROGRAM_TEMPS)
-         RETURN_ERROR1("Invalid temporary register name");
-      *tempRegNum = reg;
-   }
-   else {
-      RETURN_ERROR1("Invalid temporary register name");
-   }
-
-   return GL_TRUE;
-}
-
-
-/**
- * Parse a write-only dummy register: RC or HC.
- */
-static GLboolean
-Parse_DummyReg(struct parse_state *parseState, GLint *regNum)
-{
-   if (Parse_String(parseState, "RC")) {
-       *regNum = 0;
-   }
-   else if (Parse_String(parseState, "HC")) {
-       *regNum = 1;
-   }
-   else {
-      RETURN_ERROR1("Invalid write-only register name");
-   }
-
-   return GL_TRUE;
-}
-
-
-/**
- * Parse a program local parameter register "p[##]"
- */
-static GLboolean
-Parse_ProgramParamReg(struct parse_state *parseState, GLint *regNum)
-{
-   GLubyte token[100];
-
-   if (!Parse_String(parseState, "p["))
-      RETURN_ERROR1("Expected p[");
-
-   if (!Parse_Token(parseState, token))
-      RETURN_ERROR;
-
-   if (IsDigit(token[0])) {
-      /* a numbered program parameter register */
-      GLint reg = atoi((const char *) token);
-      if (reg >= MAX_NV_FRAGMENT_PROGRAM_PARAMS)
-         RETURN_ERROR1("Invalid constant program number");
-      *regNum = reg;
-   }
-   else {
-      RETURN_ERROR;
-   }
-
-   if (!Parse_String(parseState, "]"))
-      RETURN_ERROR1("Expected ]");
-
-   return GL_TRUE;
-}
-
-
-/**
- * Parse f[name]  - fragment input register
- */
-static GLboolean
-Parse_FragReg(struct parse_state *parseState, GLint *tempRegNum)
-{
-   GLubyte token[100];
-   GLint j;
-
-   /* Match 'f[' */
-   if (!Parse_String(parseState, "f["))
-      RETURN_ERROR1("Expected f[");
-
-   /* get <name> and look for match */
-   if (!Parse_Token(parseState, token)) {
-      RETURN_ERROR;
-   }
-   for (j = 0; InputRegisters[j]; j++) {
-      if (strcmp((const char *) token, InputRegisters[j]) == 0) {
-         *tempRegNum = j;
-         parseState->inputsRead |= (1 << j);
-         break;
-      }
-   }
-   if (!InputRegisters[j]) {
-      /* unknown input register label */
-      RETURN_ERROR2("Invalid register name", token);
-   }
-
-   /* Match '[' */
-   if (!Parse_String(parseState, "]"))
-      RETURN_ERROR1("Expected ]");
-
-   return GL_TRUE;
-}
-
-
-static GLboolean
-Parse_OutputReg(struct parse_state *parseState, GLint *outputRegNum)
-{
-   GLubyte token[100];
-
-   /* Match "o[" */
-   if (!Parse_String(parseState, "o["))
-      RETURN_ERROR1("Expected o[");
-
-   /* Get output reg name */
-   if (!Parse_Token(parseState, token))
-      RETURN_ERROR;
-
-   /* try to match an output register name */
-   if (strcmp((char *) token, "COLR") == 0 ||
-       strcmp((char *) token, "COLH") == 0) {
-      /* note that we don't distinguish between COLR and COLH */
-      *outputRegNum = FRAG_RESULT_COLOR;
-      parseState->outputsWritten |= (1 << FRAG_RESULT_COLOR);
-   }
-   else if (strcmp((char *) token, "DEPR") == 0) {
-      *outputRegNum = FRAG_RESULT_DEPTH;
-      parseState->outputsWritten |= (1 << FRAG_RESULT_DEPTH);
-   }
-   else {
-      RETURN_ERROR1("Invalid output register name");
-   }
-
-   /* Match ']' */
-   if (!Parse_String(parseState, "]"))
-      RETURN_ERROR1("Expected ]");
-
-   return GL_TRUE;
-}
-
-
-static GLboolean
-Parse_MaskedDstReg(struct parse_state *parseState,
-                   struct prog_dst_register *dstReg)
-{
-   GLubyte token[100];
-   GLint idx;
-
-   /* Dst reg can be R<n>, H<n>, o[n], RC or HC */
-   if (!Peek_Token(parseState, token))
-      RETURN_ERROR;
-
-   if (strcmp((const char *) token, "RC") == 0 ||
-       strcmp((const char *) token, "HC") == 0) {
-      /* a write-only register */
-      dstReg->File = PROGRAM_WRITE_ONLY;
-      if (!Parse_DummyReg(parseState, &idx))
-         RETURN_ERROR;
-      dstReg->Index = idx;
-   }
-   else if (token[0] == 'R' || token[0] == 'H') {
-      /* a temporary register */
-      dstReg->File = PROGRAM_TEMPORARY;
-      if (!Parse_TempReg(parseState, &idx))
-         RETURN_ERROR;
-      dstReg->Index = idx;
-   }
-   else if (token[0] == 'o') {
-      /* an output register */
-      dstReg->File = PROGRAM_OUTPUT;
-      if (!Parse_OutputReg(parseState, &idx))
-         RETURN_ERROR;
-      dstReg->Index = idx;
-   }
-   else {
-      RETURN_ERROR1("Invalid destination register name");
-   }
-
-   /* Parse optional write mask */
-   if (Parse_String(parseState, ".")) {
-      /* got a mask */
-      GLint k = 0;
-
-      if (!Parse_Token(parseState, token))  /* get xyzw writemask */
-         RETURN_ERROR;
-
-      dstReg->WriteMask = 0;
-
-      if (token[k] == 'x') {
-         dstReg->WriteMask |= WRITEMASK_X;
-         k++;
-      }
-      if (token[k] == 'y') {
-         dstReg->WriteMask |= WRITEMASK_Y;
-         k++;
-      }
-      if (token[k] == 'z') {
-         dstReg->WriteMask |= WRITEMASK_Z;
-         k++;
-      }
-      if (token[k] == 'w') {
-         dstReg->WriteMask |= WRITEMASK_W;
-         k++;
-      }
-      if (k == 0) {
-         RETURN_ERROR1("Invalid writemask character");
-      }
-
-   }
-   else {
-      dstReg->WriteMask = WRITEMASK_XYZW;
-   }
-
-   /* optional condition code mask */
-   if (Parse_String(parseState, "(")) {
-      /* ("EQ" | "GE" | "GT" | "LE" | "LT" | "NE" | "TR" | "FL".x|y|z|w) */
-      /* ("EQ" | "GE" | "GT" | "LE" | "LT" | "NE" | "TR" | "FL".[xyzw]) */
-      if (!Parse_CondCodeMask(parseState, dstReg))
-         RETURN_ERROR;
-
-      if (!Parse_String(parseState, ")"))  /* consume ")" */
-         RETURN_ERROR1("Expected )");
-
-      return GL_TRUE;
-   }
-   else {
-      /* no cond code mask */
-      dstReg->CondMask = COND_TR;
-      dstReg->CondSwizzle = SWIZZLE_NOOP;
-      return GL_TRUE;
-   }
-}
-
-
-/**
- * Parse a vector source (register, constant, etc):
- *   <vectorSrc>    ::= <absVectorSrc>
- *                    | <baseVectorSrc>
- *   <absVectorSrc> ::= <negate> "|" <baseVectorSrc> "|"
- */
-static GLboolean
-Parse_VectorSrc(struct parse_state *parseState,
-                struct prog_src_register *srcReg)
-{
-   GLfloat sign = 1.0F;
-   GLubyte token[100];
-   GLint idx;
-   GLuint negateBase, negateAbs;
-
-   /*
-    * First, take care of +/- and absolute value stuff.
-    */
-   if (Parse_String(parseState, "-"))
-      sign = -1.0F;
-   else if (Parse_String(parseState, "+"))
-      sign = +1.0F;
-
-   if (Parse_String(parseState, "|")) {
-      srcReg->Abs = GL_TRUE;
-      negateAbs = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;
-
-      if (Parse_String(parseState, "-"))
-         negateBase = NEGATE_XYZW;
-      else if (Parse_String(parseState, "+"))
-         negateBase = NEGATE_NONE;
-      else
-         negateBase = NEGATE_NONE;
-   }
-   else {
-      srcReg->Abs = GL_FALSE;
-      negateAbs = NEGATE_NONE;
-      negateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;
-   }
-
-   srcReg->Negate = srcReg->Abs ? negateAbs : negateBase;
-
-   /* This should be the real src vector/register name */
-   if (!Peek_Token(parseState, token))
-      RETURN_ERROR;
-
-   /* Src reg can be Rn, Hn, f[n], p[n], a named parameter, a scalar
-    * literal or vector literal.
-    */
-   if (token[0] == 'R' || token[0] == 'H') {
-      srcReg->File = PROGRAM_TEMPORARY;
-      if (!Parse_TempReg(parseState, &idx))
-         RETURN_ERROR;
-      srcReg->Index = idx;
-   }
-   else if (token[0] == 'f') {
-      /* XXX this might be an identifier! */
-      srcReg->File = PROGRAM_INPUT;
-      if (!Parse_FragReg(parseState, &idx))
-         RETURN_ERROR;
-      srcReg->Index = idx;
-   }
-   else if (token[0] == 'p') {
-      /* XXX this might be an identifier! */
-      srcReg->File = PROGRAM_LOCAL_PARAM;
-      if (!Parse_ProgramParamReg(parseState, &idx))
-         RETURN_ERROR;
-      srcReg->Index = idx;
-   }
-   else if (IsLetter(token[0])){
-      GLubyte ident[100];
-      GLint paramIndex;
-      if (!Parse_Identifier(parseState, ident))
-         RETURN_ERROR;
-      paramIndex = _mesa_lookup_parameter_index(parseState->parameters,
-                                                -1, (const char *) ident);
-      if (paramIndex < 0) {
-         RETURN_ERROR2("Undefined constant or parameter: ", ident);
-      }
-      srcReg->File = PROGRAM_NAMED_PARAM;
-      srcReg->Index = paramIndex;      
-   }
-   else if (IsDigit(token[0]) || token[0] == '-' || token[0] == '+' || token[0] == '.'){
-      /* literal scalar constant */
-      GLfloat values[4];
-      GLuint paramIndex;
-      if (!Parse_ScalarConstant(parseState, values))
-         RETURN_ERROR;
-      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
-                                              values, 4, NULL);
-      srcReg->File = PROGRAM_NAMED_PARAM;
-      srcReg->Index = paramIndex;
-   }
-   else if (token[0] == '{'){
-      /* literal vector constant */
-      GLfloat values[4];
-      GLuint paramIndex;
-      (void) Parse_String(parseState, "{");
-      if (!Parse_VectorConstant(parseState, values))
-         RETURN_ERROR;
-      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
-                                              values, 4, NULL);
-      srcReg->File = PROGRAM_NAMED_PARAM;
-      srcReg->Index = paramIndex;      
-   }
-   else {
-      RETURN_ERROR2("Invalid source register name", token);
-   }
-
-   /* init swizzle fields */
-   srcReg->Swizzle = SWIZZLE_NOOP;
-
-   /* Look for optional swizzle suffix */
-   if (Parse_String(parseState, ".")) {
-      GLuint swz[4];
-
-      if (!Parse_Token(parseState, token))
-         RETURN_ERROR;
-
-      if (!Parse_SwizzleSuffix(token, swz))
-         RETURN_ERROR1("Invalid swizzle suffix");
-
-      srcReg->Swizzle = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);
-   }
-
-   /* Finish absolute value */
-   if (srcReg->Abs && !Parse_String(parseState, "|")) {
-      RETURN_ERROR1("Expected |");
-   }
-
-   return GL_TRUE;
-}
-
-
-static GLboolean
-Parse_ScalarSrcReg(struct parse_state *parseState,
-                   struct prog_src_register *srcReg)
-{
-   GLubyte token[100];
-   GLfloat sign = 1.0F;
-   GLboolean needSuffix = GL_TRUE;
-   GLint idx;
-   GLuint negateBase, negateAbs;
-
-   /*
-    * First, take care of +/- and absolute value stuff.
-    */
-   if (Parse_String(parseState, "-"))
-      sign = -1.0F;
-   else if (Parse_String(parseState, "+"))
-      sign = +1.0F;
-
-   if (Parse_String(parseState, "|")) {
-      srcReg->Abs = GL_TRUE;
-      negateAbs = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;
-
-      if (Parse_String(parseState, "-"))
-         negateBase = NEGATE_XYZW;
-      else if (Parse_String(parseState, "+"))
-         negateBase = NEGATE_NONE;
-      else
-         negateBase = NEGATE_NONE;
-   }
-   else {
-      srcReg->Abs = GL_FALSE;
-      negateAbs = NEGATE_NONE;
-      negateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;
-   }
-
-   srcReg->Negate = srcReg->Abs ? negateAbs : negateBase;
-
-   if (!Peek_Token(parseState, token))
-      RETURN_ERROR;
-
-   /* Src reg can be R<n>, H<n> or a named fragment attrib */
-   if (token[0] == 'R' || token[0] == 'H') {
-      srcReg->File = PROGRAM_TEMPORARY;
-      if (!Parse_TempReg(parseState, &idx))
-         RETURN_ERROR;
-      srcReg->Index = idx;
-   }
-   else if (token[0] == 'f') {
-      srcReg->File = PROGRAM_INPUT;
-      if (!Parse_FragReg(parseState, &idx))
-         RETURN_ERROR;
-      srcReg->Index = idx;
-   }
-   else if (token[0] == '{') {
-      /* vector literal */
-      GLfloat values[4];
-      GLuint paramIndex;
-      (void) Parse_String(parseState, "{");
-      if (!Parse_VectorConstant(parseState, values))
-         RETURN_ERROR;
-      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
-                                              values, 4, NULL);
-      srcReg->File = PROGRAM_NAMED_PARAM;
-      srcReg->Index = paramIndex;      
-   }
-   else if (IsLetter(token[0])){
-      /* named param/constant */
-      GLubyte ident[100];
-      GLint paramIndex;
-      if (!Parse_Identifier(parseState, ident))
-         RETURN_ERROR;
-      paramIndex = _mesa_lookup_parameter_index(parseState->parameters,
-                                                -1, (const char *) ident);
-      if (paramIndex < 0) {
-         RETURN_ERROR2("Undefined constant or parameter: ", ident);
-      }
-      srcReg->File = PROGRAM_NAMED_PARAM;
-      srcReg->Index = paramIndex;      
-   }
-   else if (IsDigit(token[0])) {
-      /* scalar literal */
-      GLfloat values[4];
-      GLuint paramIndex;
-      if (!Parse_ScalarConstant(parseState, values))
-         RETURN_ERROR;
-      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,
-                                              values, 4, NULL);
-      srcReg->Index = paramIndex;      
-      srcReg->File = PROGRAM_NAMED_PARAM;
-      needSuffix = GL_FALSE;
-   }
-   else {
-      RETURN_ERROR2("Invalid scalar source argument", token);
-   }
-
-   srcReg->Swizzle = 0;
-   if (needSuffix) {
-      /* parse .[xyzw] suffix */
-      if (!Parse_String(parseState, "."))
-         RETURN_ERROR1("Expected .");
-
-      if (!Parse_Token(parseState, token))
-         RETURN_ERROR;
-
-      if (token[0] == 'x' && token[1] == 0) {
-         srcReg->Swizzle = 0;
-      }
-      else if (token[0] == 'y' && token[1] == 0) {
-         srcReg->Swizzle = 1;
-      }
-      else if (token[0] == 'z' && token[1] == 0) {
-         srcReg->Swizzle = 2;
-      }
-      else if (token[0] == 'w' && token[1] == 0) {
-         srcReg->Swizzle = 3;
-      }
-      else {
-         RETURN_ERROR1("Invalid scalar source suffix");
-      }
-   }
-
-   /* Finish absolute value */
-   if (srcReg->Abs && !Parse_String(parseState, "|")) {
-      RETURN_ERROR1("Expected |");
-   }
-
-   return GL_TRUE;
-}
-
-
-static GLboolean
-Parse_PrintInstruction(struct parse_state *parseState,
-                       struct prog_instruction *inst)
-{
-   const GLubyte *str;
-   GLubyte *msg;
-   GLuint len;
-   GLint idx;
-
-   /* The first argument is a literal string 'just like this' */
-   if (!Parse_String(parseState, "'"))
-      RETURN_ERROR1("Expected '");
-
-   str = parseState->pos;
-   for (len = 0; str[len] != '\''; len++) /* find closing quote */
-      ;
-   parseState->pos += len + 1;
-   msg = (GLubyte*) malloc(len + 1);
-
-   memcpy(msg, str, len);
-   msg[len] = 0;
-   inst->Data = msg;
-
-   if (Parse_String(parseState, ",")) {
-      /* got an optional register to print */
-      GLubyte token[100];
-      GetToken(parseState, token);
-      if (token[0] == 'o') {
-         /* dst reg */
-         if (!Parse_OutputReg(parseState, &idx))
-            RETURN_ERROR;
-	 inst->SrcReg[0].Index = idx;
-         inst->SrcReg[0].File = PROGRAM_OUTPUT;
-      }
-      else {
-         /* src reg */
-         if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
-            RETURN_ERROR;
-      }
-   }
-   else {
-      inst->SrcReg[0].File = PROGRAM_UNDEFINED;
-   }
-
-   inst->SrcReg[0].Swizzle = SWIZZLE_NOOP;
-   inst->SrcReg[0].Abs = GL_FALSE;
-   inst->SrcReg[0].Negate = NEGATE_NONE;
-
-   return GL_TRUE;
-}
-
-
-static GLboolean
-Parse_InstructionSequence(struct parse_state *parseState,
-                          struct prog_instruction program[])
-{
-   while (1) {
-      struct prog_instruction *inst = program + parseState->numInst;
-      struct instruction_pattern instMatch;
-      GLubyte token[100];
-
-      /* Initialize the instruction */
-      _mesa_init_instructions(inst, 1);
-
-      /* special instructions */
-      if (Parse_String(parseState, "DEFINE")) {
-         GLubyte id[100];
-         GLfloat value[7];  /* yes, 7 to be safe */
-         if (!Parse_Identifier(parseState, id))
-            RETURN_ERROR;
-         /* XXX make sure id is not a reserved identifer, like R9 */
-         if (!Parse_String(parseState, "="))
-            RETURN_ERROR1("Expected =");
-         if (!Parse_VectorOrScalarConstant(parseState, value))
-            RETURN_ERROR;
-         if (!Parse_String(parseState, ";"))
-            RETURN_ERROR1("Expected ;");
-         if (_mesa_lookup_parameter_index(parseState->parameters,
-                                          -1, (const char *) id) >= 0) {
-            RETURN_ERROR2(id, "already defined");
-         }
-         _mesa_add_named_parameter(parseState->parameters,
-                                   (const char *) id, value);
-      }
-      else if (Parse_String(parseState, "DECLARE")) {
-         GLubyte id[100];
-         GLfloat value[7] = {0, 0, 0, 0, 0, 0, 0};  /* yes, to be safe */
-         if (!Parse_Identifier(parseState, id))
-            RETURN_ERROR;
-         /* XXX make sure id is not a reserved identifer, like R9 */
-         if (Parse_String(parseState, "=")) {
-            if (!Parse_VectorOrScalarConstant(parseState, value))
-               RETURN_ERROR;
-         }
-         if (!Parse_String(parseState, ";"))
-            RETURN_ERROR1("Expected ;");
-         if (_mesa_lookup_parameter_index(parseState->parameters,
-                                          -1, (const char *) id) >= 0) {
-            RETURN_ERROR2(id, "already declared");
-         }
-         _mesa_add_named_parameter(parseState->parameters,
-                                   (const char *) id, value);
-      }
-      else if (Parse_String(parseState, "END")) {
-         inst->Opcode = OPCODE_END;
-         parseState->numInst++;
-         if (Parse_Token(parseState, token)) {
-            RETURN_ERROR1("Code after END opcode.");
-         }
-         break;
-      }
-      else {
-         /* general/arithmetic instruction */
-
-         /* get token */
-         if (!Parse_Token(parseState, token)) {
-            RETURN_ERROR1("Missing END instruction.");
-         }
-
-         /* try to find matching instuction */
-         instMatch = MatchInstruction(token);
-         if (instMatch.opcode >= MAX_OPCODE) {
-            /* bad instruction name */
-            RETURN_ERROR2("Unexpected token: ", token);
-         }
-
-         inst->Opcode = instMatch.opcode;
-         inst->Precision = instMatch.suffixes & (_R | _H | _X);
-         inst->SaturateMode = (instMatch.suffixes & (_S))
-            ? SATURATE_ZERO_ONE : SATURATE_OFF;
-         inst->CondUpdate = (instMatch.suffixes & (_C)) ? GL_TRUE : GL_FALSE;
-
-         /*
-          * parse the input and output operands
-          */
-         if (instMatch.outputs == OUTPUT_S || instMatch.outputs == OUTPUT_V) {
-            if (!Parse_MaskedDstReg(parseState, &inst->DstReg))
-               RETURN_ERROR;
-            if (!Parse_String(parseState, ","))
-               RETURN_ERROR1("Expected ,");
-         }
-         else if (instMatch.outputs == OUTPUT_NONE) {
-            if (instMatch.opcode == OPCODE_KIL_NV) {
-               /* This is a little weird, the cond code info is in
-                * the dest register.
-                */
-               if (!Parse_CondCodeMask(parseState, &inst->DstReg))
-                  RETURN_ERROR;
-            }
-            else {
-               ASSERT(instMatch.opcode == OPCODE_PRINT);
-            }
-         }
-
-         if (instMatch.inputs == INPUT_1V) {
-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
-               RETURN_ERROR;
-         }
-         else if (instMatch.inputs == INPUT_2V) {
-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
-               RETURN_ERROR;
-            if (!Parse_String(parseState, ","))
-               RETURN_ERROR1("Expected ,");
-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))
-               RETURN_ERROR;
-         }
-         else if (instMatch.inputs == INPUT_3V) {
-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
-               RETURN_ERROR;
-            if (!Parse_String(parseState, ","))
-               RETURN_ERROR1("Expected ,");
-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))
-               RETURN_ERROR;
-            if (!Parse_String(parseState, ","))
-               RETURN_ERROR1("Expected ,");
-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[2]))
-               RETURN_ERROR;
-         }
-         else if (instMatch.inputs == INPUT_1S) {
-            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[0]))
-               RETURN_ERROR;
-         }
-         else if (instMatch.inputs == INPUT_2S) {
-            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[0]))
-               RETURN_ERROR;
-            if (!Parse_String(parseState, ","))
-               RETURN_ERROR1("Expected ,");
-            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[1]))
-               RETURN_ERROR;
-         }
-         else if (instMatch.inputs == INPUT_CC) {
-            /* XXX to-do */
-         }
-         else if (instMatch.inputs == INPUT_1V_T) {
-	    GLubyte unit, idx;
-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
-               RETURN_ERROR;
-            if (!Parse_String(parseState, ","))
-               RETURN_ERROR1("Expected ,");
-            if (!Parse_TextureImageId(parseState, &unit, &idx))
-               RETURN_ERROR;
-	    inst->TexSrcUnit = unit;
-	    inst->TexSrcTarget = idx;
-         }
-         else if (instMatch.inputs == INPUT_3V_T) {
-	    GLubyte unit, idx;
-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))
-               RETURN_ERROR;
-            if (!Parse_String(parseState, ","))
-               RETURN_ERROR1("Expected ,");
-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))
-               RETURN_ERROR;
-            if (!Parse_String(parseState, ","))
-               RETURN_ERROR1("Expected ,");
-            if (!Parse_VectorSrc(parseState, &inst->SrcReg[2]))
-               RETURN_ERROR;
-            if (!Parse_String(parseState, ","))
-               RETURN_ERROR1("Expected ,");
-            if (!Parse_TextureImageId(parseState, &unit, &idx))
-               RETURN_ERROR;
-	    inst->TexSrcUnit = unit;
-	    inst->TexSrcTarget = idx;
-         }
-         else if (instMatch.inputs == INPUT_1V_S) {
-            if (!Parse_PrintInstruction(parseState, inst))
-               RETURN_ERROR;
-         }
-
-         /* end of statement semicolon */
-         if (!Parse_String(parseState, ";"))
-            RETURN_ERROR1("Expected ;");
-
-         parseState->numInst++;
-
-         if (parseState->numInst >= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS)
-            RETURN_ERROR1("Program too long");
-      }
-   }
-   return GL_TRUE;
-}
-
-
-
-/**
- * Parse/compile the 'str' returning the compiled 'program'.
- * ctx->Program.ErrorPos will be -1 if successful.  Otherwise, ErrorPos
- * indicates the position of the error in 'str'.
- */
-void
-_mesa_parse_nv_fragment_program(GLcontext *ctx, GLenum dstTarget,
-                                const GLubyte *str, GLsizei len,
-                                struct gl_fragment_program *program)
-{
-   struct parse_state parseState;
-   struct prog_instruction instBuffer[MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS];
-   struct prog_instruction *newInst;
-   GLenum target;
-   GLubyte *programString;
-
-   /* Make a null-terminated copy of the program string */
-   programString = (GLubyte *) MALLOC(len + 1);
-   if (!programString) {
-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glLoadProgramNV");
-      return;
-   }
-   memcpy(programString, str, len);
-   programString[len] = 0;
-
-   /* Get ready to parse */
-   memset(&parseState, 0, sizeof(struct parse_state));
-   parseState.ctx = ctx;
-   parseState.start = programString;
-   parseState.program = program;
-   parseState.numInst = 0;
-   parseState.curLine = programString;
-   parseState.parameters = _mesa_new_parameter_list();
-
-   /* Reset error state */
-   _mesa_set_program_error(ctx, -1, NULL);
-
-   /* check the program header */
-   if (strncmp((const char *) programString, "!!FP1.0", 7) == 0) {
-      target = GL_FRAGMENT_PROGRAM_NV;
-      parseState.pos = programString + 7;
-   }
-   else if (strncmp((const char *) programString, "!!FCP1.0", 8) == 0) {
-      /* fragment / register combiner program - not supported */
-      _mesa_set_program_error(ctx, 0, "Invalid fragment program header");
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV(bad header)");
-      return;
-   }
-   else {
-      /* invalid header */
-      _mesa_set_program_error(ctx, 0, "Invalid fragment program header");
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV(bad header)");
-      return;
-   }
-
-   /* make sure target and header match */
-   if (target != dstTarget) {
-      _mesa_error(ctx, GL_INVALID_OPERATION,
-                  "glLoadProgramNV(target mismatch 0x%x != 0x%x)",
-                  target, dstTarget);
-      return;
-   }
-
-   if (Parse_InstructionSequence(&parseState, instBuffer)) {
-      GLuint u;
-      /* successful parse! */
-
-      if (parseState.outputsWritten == 0) {
-         /* must write at least one output! */
-         _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "Invalid fragment program - no outputs written.");
-         return;
-      }
-
-      /* copy the compiled instructions */
-      assert(parseState.numInst <= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS);
-      newInst = _mesa_alloc_instructions(parseState.numInst);
-      if (!newInst) {
-         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glLoadProgramNV");
-         return;  /* out of memory */
-      }
-      _mesa_copy_instructions(newInst, instBuffer, parseState.numInst);
-
-      /* install the program */
-      program->Base.Target = target;
-      if (program->Base.String) {
-         FREE(program->Base.String);
-      }
-      program->Base.String = programString;
-      program->Base.Format = GL_PROGRAM_FORMAT_ASCII_ARB;
-      if (program->Base.Instructions) {
-         free(program->Base.Instructions);
-      }
-      program->Base.Instructions = newInst;
-      program->Base.NumInstructions = parseState.numInst;
-      program->Base.InputsRead = parseState.inputsRead;
-      program->Base.OutputsWritten = parseState.outputsWritten;
-      for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++)
-         program->Base.TexturesUsed[u] = parseState.texturesUsed[u];
-
-      /* save program parameters */
-      program->Base.Parameters = parseState.parameters;
-
-      /* allocate registers for declared program parameters */
-#if 00
-      _mesa_assign_program_registers(&(program->SymbolTable));
-#endif
-
-#ifdef DEBUG_foo
-      printf("--- glLoadProgramNV(%d) result ---\n", program->Base.Id);
-      _mesa_fprint_program_opt(stdout, &program->Base, PROG_PRINT_NV, 0);
-      printf("----------------------------------\n");
-#endif
-   }
-   else {
-      /* Error! */
-      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV");
-      /* NOTE: _mesa_set_program_error would have been called already */
-   }
-}
-
-
-const char *
-_mesa_nv_fragment_input_register_name(GLuint i)
-{
-   ASSERT(i < MAX_NV_FRAGMENT_PROGRAM_INPUTS);
-   return InputRegisters[i];
-}
-
+/*

+ * Mesa 3-D graphics library

+ * Version:  6.5

+ *

+ * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is furnished to do so, subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice shall be included

+ * in all copies or substantial portions of the Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+ */

+

+/**

+ * \file nvfragparse.c

+ * NVIDIA fragment program parser.

+ * \author Brian Paul

+ */

+

+/*

+ * Regarding GL_NV_fragment_program:

+ *

+ * Portions of this software may use or implement intellectual

+ * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims

+ * any and all warranties with respect to such intellectual property,

+ * including any use thereof or modifications thereto.

+ */

+

+#include "main/glheader.h"

+#include "main/context.h"

+#include "main/imports.h"

+#include "main/macros.h"

+#include "program.h"

+#include "prog_parameter.h"

+#include "prog_print.h"

+#include "prog_instruction.h"

+#include "nvfragparse.h"

+

+

+#define INPUT_1V     1

+#define INPUT_2V     2

+#define INPUT_3V     3

+#define INPUT_1S     4

+#define INPUT_2S     5

+#define INPUT_CC     6

+#define INPUT_1V_T   7  /* one source vector, plus textureId */

+#define INPUT_3V_T   8  /* one source vector, plus textureId */

+#define INPUT_NONE   9

+#define INPUT_1V_S  10  /* a string and a vector register */

+#define OUTPUT_V    20

+#define OUTPUT_S    21

+#define OUTPUT_NONE 22

+

+/* IRIX defines some of these */

+#undef _R

+#undef _H

+#undef _X

+#undef _C

+#undef _S

+

+/* Optional suffixes */

+#define _R  FLOAT32  /* float */

+#define _H  FLOAT16  /* half-float */

+#define _X  FIXED12  /* fixed */

+#define _C  0x08     /* set cond codes */

+#define _S  0x10     /* saturate, clamp result to [0,1] */

+

+struct instruction_pattern {

+   const char *name;

+   enum prog_opcode opcode;

+   GLuint inputs;

+   GLuint outputs;

+   GLuint suffixes;

+};

+

+static const struct instruction_pattern Instructions[] = {

+   { "ADD", OPCODE_ADD, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "COS", OPCODE_COS, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

+   { "DDX", OPCODE_DDX, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },

+   { "DDY", OPCODE_DDY, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },

+   { "DP3", OPCODE_DP3, INPUT_2V, OUTPUT_S, _R | _H | _X | _C | _S },

+   { "DP4", OPCODE_DP4, INPUT_2V, OUTPUT_S, _R | _H | _X | _C | _S },

+   { "DST", OPCODE_DP4, INPUT_2V, OUTPUT_V, _R | _H |      _C | _S },

+   { "EX2", OPCODE_DP4, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

+   { "FLR", OPCODE_FLR, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "FRC", OPCODE_FRC, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "KIL", OPCODE_KIL_NV, INPUT_CC, OUTPUT_NONE, 0                },

+   { "LG2", OPCODE_LG2, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

+   { "LIT", OPCODE_LIT, INPUT_1V, OUTPUT_V, _R | _H |      _C | _S },

+   { "LRP", OPCODE_LRP, INPUT_3V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "MAD", OPCODE_MAD, INPUT_3V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "MAX", OPCODE_MAX, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "MIN", OPCODE_MIN, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "MOV", OPCODE_MOV, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "MUL", OPCODE_MUL, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "PK2H",  OPCODE_PK2H,  INPUT_1V, OUTPUT_S, 0                  },

+   { "PK2US", OPCODE_PK2US, INPUT_1V, OUTPUT_S, 0                  },

+   { "PK4B",  OPCODE_PK4B,  INPUT_1V, OUTPUT_S, 0                  },

+   { "PK4UB", OPCODE_PK4UB, INPUT_1V, OUTPUT_S, 0                  },

+   { "POW", OPCODE_POW, INPUT_2S, OUTPUT_S, _R | _H |      _C | _S },

+   { "RCP", OPCODE_RCP, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

+   { "RFL", OPCODE_RFL, INPUT_2V, OUTPUT_V, _R | _H |      _C | _S },

+   { "RSQ", OPCODE_RSQ, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

+   { "SEQ", OPCODE_SEQ, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "SFL", OPCODE_SFL, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "SGE", OPCODE_SGE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "SGT", OPCODE_SGT, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "SIN", OPCODE_SIN, INPUT_1S, OUTPUT_S, _R | _H |      _C | _S },

+   { "SLE", OPCODE_SLE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "SLT", OPCODE_SLT, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "SNE", OPCODE_SNE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "STR", OPCODE_STR, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "SUB", OPCODE_SUB, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S },

+   { "TEX", OPCODE_TEX, INPUT_1V_T, OUTPUT_V,              _C | _S },

+   { "TXD", OPCODE_TXD, INPUT_3V_T, OUTPUT_V,              _C | _S },

+   { "TXP", OPCODE_TXP_NV, INPUT_1V_T, OUTPUT_V,           _C | _S },

+   { "UP2H",  OPCODE_UP2H,  INPUT_1S, OUTPUT_V,            _C | _S },

+   { "UP2US", OPCODE_UP2US, INPUT_1S, OUTPUT_V,            _C | _S },

+   { "UP4B",  OPCODE_UP4B,  INPUT_1S, OUTPUT_V,            _C | _S },

+   { "UP4UB", OPCODE_UP4UB, INPUT_1S, OUTPUT_V,            _C | _S },

+   { "X2D", OPCODE_X2D, INPUT_3V, OUTPUT_V, _R | _H |      _C | _S },

+   { "PRINT", OPCODE_PRINT, INPUT_1V_S, OUTPUT_NONE, 0               },

+   { NULL, (enum prog_opcode) -1, 0, 0, 0 }

+};

+

+

+/*

+ * Information needed or computed during parsing.

+ * Remember, we can't modify the target program object until we've

+ * _successfully_ parsed the program text.

+ */

+struct parse_state {

+   struct gl_context *ctx;

+   const GLubyte *start;              /* start of program string */

+   const GLubyte *pos;                /* current position */

+   const GLubyte *curLine;

+   struct gl_fragment_program *program;  /* current program */

+

+   struct gl_program_parameter_list *parameters;

+

+   GLuint numInst;                    /* number of instructions parsed */

+   GLuint inputsRead;                 /* bitmask of input registers used */

+   GLuint outputsWritten;             /* bitmask of 1 << FRAG_OUTPUT_* bits */

+   GLuint texturesUsed[MAX_TEXTURE_IMAGE_UNITS];

+};

+

+

+

+/*

+ * Called whenever we find an error during parsing.

+ */

+static void

+record_error(struct parse_state *parseState, const char *msg, int lineNo)

+{

+#ifdef DEBUG

+   GLint line, column;

+   const GLubyte *lineStr;

+   lineStr = _mesa_find_line_column(parseState->start,

+                                    parseState->pos, &line, &column);

+   _mesa_debug(parseState->ctx,

+               "nvfragparse.c(%d): line %d, column %d:%s (%s)\n",

+               lineNo, line, column, (char *) lineStr, msg);

+   free((void *) lineStr);

+#else

+   (void) lineNo;

+#endif

+

+   /* Check that no error was already recorded.  Only record the first one. */

+   if (parseState->ctx->Program.ErrorString[0] == 0) {

+      _mesa_set_program_error(parseState->ctx,

+                              parseState->pos - parseState->start,

+                              msg);

+   }

+}

+

+

+#define RETURN_ERROR							\

+do {									\

+   record_error(parseState, "Unexpected end of input.", __LINE__);	\

+   return GL_FALSE;							\

+} while(0)

+

+#define RETURN_ERROR1(msg)						\

+do {									\

+   record_error(parseState, msg, __LINE__);				\

+   return GL_FALSE;							\

+} while(0)

+

+#define RETURN_ERROR2(msg1, msg2)					\

+do {									\

+   char err[1000];							\

+   sprintf(err, "%s %s", msg1, msg2);				\

+   record_error(parseState, err, __LINE__);				\

+   return GL_FALSE;							\

+} while(0)

+

+

+

+

+/*

+ * Search a list of instruction structures for a match.

+ */

+static struct instruction_pattern

+MatchInstruction(const GLubyte *token)

+{

+   const struct instruction_pattern *inst;

+   struct instruction_pattern result;

+

+   result.name = NULL;

+   result.opcode = MAX_OPCODE; /* i.e. invalid instruction */

+   result.inputs = 0;

+   result.outputs = 0;

+   result.suffixes = 0;

+

+   for (inst = Instructions; inst->name; inst++) {

+      if (strncmp((const char *) token, inst->name, 3) == 0) {

+         /* matched! */

+         int i = 3;

+         result = *inst;

+         result.suffixes = 0;

+         /* look at suffix */

+         if (token[i] == 'R') {

+            result.suffixes |= _R;

+            i++;

+         }

+         else if (token[i] == 'H') {

+            result.suffixes |= _H;

+            i++;

+         }

+         else if (token[i] == 'X') {

+            result.suffixes |= _X;

+            i++;

+         }

+         if (token[i] == 'C') {

+            result.suffixes |= _C;

+            i++;

+         }

+         if (token[i] == '_' && token[i+1] == 'S' &&

+             token[i+2] == 'A' && token[i+3] == 'T') {

+            result.suffixes |= _S;

+         }

+         return result;

+      }

+   }

+

+   return result;

+}

+

+

+

+

+/**********************************************************************/

+

+

+static GLboolean IsLetter(GLubyte b)

+{

+   return (b >= 'a' && b <= 'z') ||

+          (b >= 'A' && b <= 'Z') ||

+          (b == '_') ||

+          (b == '$');

+}

+

+

+static GLboolean IsDigit(GLubyte b)

+{

+   return b >= '0' && b <= '9';

+}

+

+

+static GLboolean IsWhitespace(GLubyte b)

+{

+   return b == ' ' || b == '\t' || b == '\n' || b == '\r';

+}

+

+

+/**

+ * Starting at 'str' find the next token.  A token can be an integer,

+ * an identifier or punctuation symbol.

+ * \return <= 0 we found an error, else, return number of characters parsed.

+ */

+static GLint

+GetToken(struct parse_state *parseState, GLubyte *token)

+{

+   const GLubyte *str = parseState->pos;

+   GLint i = 0, j = 0;

+

+   token[0] = 0;

+

+   /* skip whitespace and comments */

+   while (str[i] && (IsWhitespace(str[i]) || str[i] == '#')) {

+      if (str[i] == '#') {

+         /* skip comment */

+         while (str[i] && (str[i] != '\n' && str[i] != '\r')) {

+            i++;

+         }

+         if (str[i] == '\n' || str[i] == '\r')

+            parseState->curLine = str + i + 1;

+      }

+      else {

+         /* skip whitespace */

+         if (str[i] == '\n' || str[i] == '\r')

+            parseState->curLine = str + i + 1;

+         i++;

+      }

+   }

+

+   if (str[i] == 0)

+      return -i;

+

+   /* try matching an integer */

+   while (str[i] && IsDigit(str[i])) {

+      token[j++] = str[i++];

+   }

+   if (j > 0 || !str[i]) {

+      token[j] = 0;

+      return i;

+   }

+

+   /* try matching an identifier */

+   if (IsLetter(str[i])) {

+      while (str[i] && (IsLetter(str[i]) || IsDigit(str[i]))) {

+         token[j++] = str[i++];

+      }

+      token[j] = 0;

+      return i;

+   }

+

+   /* punctuation character */

+   if (str[i]) {

+      token[0] = str[i++];

+      token[1] = 0;

+      return i;

+   }

+

+   /* end of input */

+   token[0] = 0;

+   return i;

+}

+

+

+/**

+ * Get next token from input stream and increment stream pointer past token.

+ */

+static GLboolean

+Parse_Token(struct parse_state *parseState, GLubyte *token)

+{

+   GLint i;

+   i = GetToken(parseState, token);

+   if (i <= 0) {

+      parseState->pos += (-i);

+      return GL_FALSE;

+   }

+   parseState->pos += i;

+   return GL_TRUE;

+}

+

+

+/**

+ * Get next token from input stream but don't increment stream pointer.

+ */

+static GLboolean

+Peek_Token(struct parse_state *parseState, GLubyte *token)

+{

+   GLint i, len;

+   i = GetToken(parseState, token);

+   if (i <= 0) {

+      parseState->pos += (-i);

+      return GL_FALSE;

+   }

+   len = (GLint) strlen((const char *) token);

+   parseState->pos += (i - len);

+   return GL_TRUE;

+}

+

+

+/**********************************************************************/

+

+static const char *InputRegisters[MAX_NV_FRAGMENT_PROGRAM_INPUTS + 1] = {

+   "WPOS", "COL0", "COL1", "FOGC",

+   "TEX0", "TEX1", "TEX2", "TEX3", "TEX4", "TEX5", "TEX6", "TEX7", NULL

+};

+

+

+

+/**********************************************************************/

+

+/**

+ * Try to match 'pattern' as the next token after any whitespace/comments.

+ */

+static GLboolean

+Parse_String(struct parse_state *parseState, const char *pattern)

+{

+   const GLubyte *m;

+   GLint i;

+

+   /* skip whitespace and comments */

+   while (IsWhitespace(*parseState->pos) || *parseState->pos == '#') {

+      if (*parseState->pos == '#') {

+         while (*parseState->pos && (*parseState->pos != '\n' && *parseState->pos != '\r')) {

+            parseState->pos += 1;

+         }

+         if (*parseState->pos == '\n' || *parseState->pos == '\r')

+            parseState->curLine = parseState->pos + 1;

+      }

+      else {

+         /* skip whitespace */

+         if (*parseState->pos == '\n' || *parseState->pos == '\r')

+            parseState->curLine = parseState->pos + 1;

+         parseState->pos += 1;

+      }

+   }

+

+   /* Try to match the pattern */

+   m = parseState->pos;

+   for (i = 0; pattern[i]; i++) {

+      if (*m != (GLubyte) pattern[i])

+         return GL_FALSE;

+      m += 1;

+   }

+   parseState->pos = m;

+

+   return GL_TRUE; /* success */

+}

+

+

+static GLboolean

+Parse_Identifier(struct parse_state *parseState, GLubyte *ident)

+{

+   if (!Parse_Token(parseState, ident))

+      RETURN_ERROR;

+   if (IsLetter(ident[0]))

+      return GL_TRUE;

+   else

+      RETURN_ERROR1("Expected an identfier");

+}

+

+

+/**

+ * Parse a floating point constant, or a defined symbol name.

+ * [+/-]N[.N[eN]]

+ * Output:  number[0 .. 3] will get the value.

+ */

+static GLboolean

+Parse_ScalarConstant(struct parse_state *parseState, GLfloat *number)

+{

+   char *end = NULL;

+

+   *number = (GLfloat) _mesa_strtof((const char *) parseState->pos, &end);

+

+   if (end && end > (char *) parseState->pos) {

+      /* got a number */

+      parseState->pos = (GLubyte *) end;

+      number[1] = *number;

+      number[2] = *number;

+      number[3] = *number;

+      return GL_TRUE;

+   }

+   else {

+      /* should be an identifier */

+      GLubyte ident[100];

+      const GLfloat *constant;

+      if (!Parse_Identifier(parseState, ident))

+         RETURN_ERROR1("Expected an identifier");

+      constant = _mesa_lookup_parameter_value(parseState->parameters,

+                                              -1, (const char *) ident);

+      /* XXX Check that it's a constant and not a parameter */

+      if (!constant) {

+         RETURN_ERROR1("Undefined symbol");

+      }

+      else {

+         COPY_4V(number, constant);

+         return GL_TRUE;

+      }

+   }

+}

+

+

+

+/**

+ * Parse a vector constant, one of:

+ *   { float }

+ *   { float, float }

+ *   { float, float, float }

+ *   { float, float, float, float }

+ */

+static GLboolean

+Parse_VectorConstant(struct parse_state *parseState, GLfloat *vec)

+{

+   /* "{" was already consumed */

+

+   ASSIGN_4V(vec, 0.0, 0.0, 0.0, 1.0);

+

+   if (!Parse_ScalarConstant(parseState, vec+0))  /* X */

+      return GL_FALSE;

+

+   if (Parse_String(parseState, "}")) {

+      return GL_TRUE;

+   }

+

+   if (!Parse_String(parseState, ","))

+      RETURN_ERROR1("Expected comma in vector constant");

+

+   if (!Parse_ScalarConstant(parseState, vec+1))  /* Y */

+      return GL_FALSE;

+

+   if (Parse_String(parseState, "}")) {

+      return GL_TRUE;

+   }

+

+   if (!Parse_String(parseState, ","))

+      RETURN_ERROR1("Expected comma in vector constant");

+

+   if (!Parse_ScalarConstant(parseState, vec+2))  /* Z */

+      return GL_FALSE;

+

+   if (Parse_String(parseState, "}")) {

+      return GL_TRUE;

+   }

+

+   if (!Parse_String(parseState, ","))

+      RETURN_ERROR1("Expected comma in vector constant");

+

+   if (!Parse_ScalarConstant(parseState, vec+3))  /* W */

+      return GL_FALSE;

+

+   if (!Parse_String(parseState, "}"))

+      RETURN_ERROR1("Expected closing brace in vector constant");

+

+   return GL_TRUE;

+}

+

+

+/**

+ * Parse <number>, <varname> or {a, b, c, d}.

+ * Return number of values in the vector or scalar, or zero if parse error.

+ */

+static GLuint

+Parse_VectorOrScalarConstant(struct parse_state *parseState, GLfloat *vec)

+{

+   if (Parse_String(parseState, "{")) {

+      return Parse_VectorConstant(parseState, vec);

+   }

+   else {

+      GLboolean b = Parse_ScalarConstant(parseState, vec);

+      if (b) {

+         vec[1] = vec[2] = vec[3] = vec[0];

+      }

+      return b;

+   }

+}

+

+

+/**

+ * Parse a texture image source:

+ *    [TEX0 | TEX1 | .. | TEX15] , [1D | 2D | 3D | CUBE | RECT]

+ */

+static GLboolean

+Parse_TextureImageId(struct parse_state *parseState,

+                     GLubyte *texUnit, GLubyte *texTargetBit)

+{

+   GLubyte imageSrc[100];

+   GLint unit;

+

+   if (!Parse_Token(parseState, imageSrc))

+      RETURN_ERROR;

+   

+   if (imageSrc[0] != 'T' ||

+       imageSrc[1] != 'E' ||

+       imageSrc[2] != 'X') {

+      RETURN_ERROR1("Expected TEX# source");

+   }

+   unit = atoi((const char *) imageSrc + 3);

+   if ((unit < 0 || unit > MAX_TEXTURE_IMAGE_UNITS) ||

+       (unit == 0 && (imageSrc[3] != '0' || imageSrc[4] != 0))) {

+      RETURN_ERROR1("Invalied TEX# source index");

+   }

+   *texUnit = unit;

+

+   if (!Parse_String(parseState, ","))

+      RETURN_ERROR1("Expected ,");

+

+   if (Parse_String(parseState, "1D")) {

+      *texTargetBit = TEXTURE_1D_BIT;

+   }

+   else if (Parse_String(parseState, "2D")) {

+      *texTargetBit = TEXTURE_2D_BIT;

+   }

+   else if (Parse_String(parseState, "3D")) {

+      *texTargetBit = TEXTURE_3D_BIT;

+   }

+   else if (Parse_String(parseState, "CUBE")) {

+      *texTargetBit = TEXTURE_CUBE_BIT;

+   }

+   else if (Parse_String(parseState, "RECT")) {

+      *texTargetBit = TEXTURE_RECT_BIT;

+   }

+   else {

+      RETURN_ERROR1("Invalid texture target token");

+   }

+

+   /* update record of referenced texture units */

+   parseState->texturesUsed[*texUnit] |= *texTargetBit;

+   if (_mesa_bitcount(parseState->texturesUsed[*texUnit]) > 1) {

+      RETURN_ERROR1("Only one texture target can be used per texture unit.");

+   }

+

+   return GL_TRUE;

+}

+

+

+/**

+ * Parse a scalar suffix like .x, .y, .z or .w or parse a swizzle suffix

+ * like .wxyz, .xxyy, etc and return the swizzle indexes.

+ */

+static GLboolean

+Parse_SwizzleSuffix(const GLubyte *token, GLuint swizzle[4])

+{

+   if (token[1] == 0) {

+      /* single letter swizzle (scalar) */

+      if (token[0] == 'x')

+         ASSIGN_4V(swizzle, 0, 0, 0, 0);

+      else if (token[0] == 'y')

+         ASSIGN_4V(swizzle, 1, 1, 1, 1);

+      else if (token[0] == 'z')

+         ASSIGN_4V(swizzle, 2, 2, 2, 2);

+      else if (token[0] == 'w')

+         ASSIGN_4V(swizzle, 3, 3, 3, 3);

+      else

+         return GL_FALSE;

+   }

+   else {

+      /* 4-component swizzle (vector) */

+      GLint k;

+      for (k = 0; k < 4 && token[k]; k++) {

+         if (token[k] == 'x')

+            swizzle[k] = 0;

+         else if (token[k] == 'y')

+            swizzle[k] = 1;

+         else if (token[k] == 'z')

+            swizzle[k] = 2;

+         else if (token[k] == 'w')

+            swizzle[k] = 3;

+         else

+            return GL_FALSE;

+      }

+      if (k != 4)

+         return GL_FALSE;

+   }

+   return GL_TRUE;

+}

+

+

+static GLboolean

+Parse_CondCodeMask(struct parse_state *parseState,

+                   struct prog_dst_register *dstReg)

+{

+   if (Parse_String(parseState, "EQ"))

+      dstReg->CondMask = COND_EQ;

+   else if (Parse_String(parseState, "GE"))

+      dstReg->CondMask = COND_GE;

+   else if (Parse_String(parseState, "GT"))

+      dstReg->CondMask = COND_GT;

+   else if (Parse_String(parseState, "LE"))

+      dstReg->CondMask = COND_LE;

+   else if (Parse_String(parseState, "LT"))

+      dstReg->CondMask = COND_LT;

+   else if (Parse_String(parseState, "NE"))

+      dstReg->CondMask = COND_NE;

+   else if (Parse_String(parseState, "TR"))

+      dstReg->CondMask = COND_TR;

+   else if (Parse_String(parseState, "FL"))

+      dstReg->CondMask = COND_FL;

+   else

+      RETURN_ERROR1("Invalid condition code mask");

+

+   /* look for optional .xyzw swizzle */

+   if (Parse_String(parseState, ".")) {

+      GLubyte token[100];

+      GLuint swz[4];

+

+      if (!Parse_Token(parseState, token))  /* get xyzw suffix */

+         RETURN_ERROR;

+

+      if (!Parse_SwizzleSuffix(token, swz))

+         RETURN_ERROR1("Invalid swizzle suffix");

+

+      dstReg->CondSwizzle = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);

+   }

+

+   return GL_TRUE;

+}

+

+

+/**

+ * Parse a temporary register: Rnn or Hnn

+ */

+static GLboolean

+Parse_TempReg(struct parse_state *parseState, GLint *tempRegNum)

+{

+   GLubyte token[100];

+

+   /* Should be 'R##' or 'H##' */

+   if (!Parse_Token(parseState, token))

+      RETURN_ERROR;

+   if (token[0] != 'R' && token[0] != 'H')

+      RETURN_ERROR1("Expected R## or H##");

+

+   if (IsDigit(token[1])) {

+      GLint reg = atoi((const char *) (token + 1));

+      if (token[0] == 'H')

+         reg += 32;

+      if (reg >= MAX_NV_FRAGMENT_PROGRAM_TEMPS)

+         RETURN_ERROR1("Invalid temporary register name");

+      *tempRegNum = reg;

+   }

+   else {

+      RETURN_ERROR1("Invalid temporary register name");

+   }

+

+   return GL_TRUE;

+}

+

+

+/**

+ * Parse a write-only dummy register: RC or HC.

+ */

+static GLboolean

+Parse_DummyReg(struct parse_state *parseState, GLint *regNum)

+{

+   if (Parse_String(parseState, "RC")) {

+       *regNum = 0;

+   }

+   else if (Parse_String(parseState, "HC")) {

+       *regNum = 1;

+   }

+   else {

+      RETURN_ERROR1("Invalid write-only register name");

+   }

+

+   return GL_TRUE;

+}

+

+

+/**

+ * Parse a program local parameter register "p[##]"

+ */

+static GLboolean

+Parse_ProgramParamReg(struct parse_state *parseState, GLint *regNum)

+{

+   GLubyte token[100];

+

+   if (!Parse_String(parseState, "p["))

+      RETURN_ERROR1("Expected p[");

+

+   if (!Parse_Token(parseState, token))

+      RETURN_ERROR;

+

+   if (IsDigit(token[0])) {

+      /* a numbered program parameter register */

+      GLint reg = atoi((const char *) token);

+      if (reg >= MAX_NV_FRAGMENT_PROGRAM_PARAMS)

+         RETURN_ERROR1("Invalid constant program number");

+      *regNum = reg;

+   }

+   else {

+      RETURN_ERROR;

+   }

+

+   if (!Parse_String(parseState, "]"))

+      RETURN_ERROR1("Expected ]");

+

+   return GL_TRUE;

+}

+

+

+/**

+ * Parse f[name]  - fragment input register

+ */

+static GLboolean

+Parse_FragReg(struct parse_state *parseState, GLint *tempRegNum)

+{

+   GLubyte token[100];

+   GLint j;

+

+   /* Match 'f[' */

+   if (!Parse_String(parseState, "f["))

+      RETURN_ERROR1("Expected f[");

+

+   /* get <name> and look for match */

+   if (!Parse_Token(parseState, token)) {

+      RETURN_ERROR;

+   }

+   for (j = 0; InputRegisters[j]; j++) {

+      if (strcmp((const char *) token, InputRegisters[j]) == 0) {

+         *tempRegNum = j;

+         parseState->inputsRead |= (1 << j);

+         break;

+      }

+   }

+   if (!InputRegisters[j]) {

+      /* unknown input register label */

+      RETURN_ERROR2("Invalid register name", token);

+   }

+

+   /* Match '[' */

+   if (!Parse_String(parseState, "]"))

+      RETURN_ERROR1("Expected ]");

+

+   return GL_TRUE;

+}

+

+

+static GLboolean

+Parse_OutputReg(struct parse_state *parseState, GLint *outputRegNum)

+{

+   GLubyte token[100];

+

+   /* Match "o[" */

+   if (!Parse_String(parseState, "o["))

+      RETURN_ERROR1("Expected o[");

+

+   /* Get output reg name */

+   if (!Parse_Token(parseState, token))

+      RETURN_ERROR;

+

+   /* try to match an output register name */

+   if (strcmp((char *) token, "COLR") == 0 ||

+       strcmp((char *) token, "COLH") == 0) {

+      /* note that we don't distinguish between COLR and COLH */

+      *outputRegNum = FRAG_RESULT_COLOR;

+      parseState->outputsWritten |= (1 << FRAG_RESULT_COLOR);

+   }

+   else if (strcmp((char *) token, "DEPR") == 0) {

+      *outputRegNum = FRAG_RESULT_DEPTH;

+      parseState->outputsWritten |= (1 << FRAG_RESULT_DEPTH);

+   }

+   else {

+      RETURN_ERROR1("Invalid output register name");

+   }

+

+   /* Match ']' */

+   if (!Parse_String(parseState, "]"))

+      RETURN_ERROR1("Expected ]");

+

+   return GL_TRUE;

+}

+

+

+static GLboolean

+Parse_MaskedDstReg(struct parse_state *parseState,

+                   struct prog_dst_register *dstReg)

+{

+   GLubyte token[100];

+   GLint idx;

+

+   /* Dst reg can be R<n>, H<n>, o[n], RC or HC */

+   if (!Peek_Token(parseState, token))

+      RETURN_ERROR;

+

+   if (strcmp((const char *) token, "RC") == 0 ||

+       strcmp((const char *) token, "HC") == 0) {

+      /* a write-only register */

+      dstReg->File = PROGRAM_WRITE_ONLY;

+      if (!Parse_DummyReg(parseState, &idx))

+         RETURN_ERROR;

+      dstReg->Index = idx;

+   }

+   else if (token[0] == 'R' || token[0] == 'H') {

+      /* a temporary register */

+      dstReg->File = PROGRAM_TEMPORARY;

+      if (!Parse_TempReg(parseState, &idx))

+         RETURN_ERROR;

+      dstReg->Index = idx;

+   }

+   else if (token[0] == 'o') {

+      /* an output register */

+      dstReg->File = PROGRAM_OUTPUT;

+      if (!Parse_OutputReg(parseState, &idx))

+         RETURN_ERROR;

+      dstReg->Index = idx;

+   }

+   else {

+      RETURN_ERROR1("Invalid destination register name");

+   }

+

+   /* Parse optional write mask */

+   if (Parse_String(parseState, ".")) {

+      /* got a mask */

+      GLint k = 0;

+

+      if (!Parse_Token(parseState, token))  /* get xyzw writemask */

+         RETURN_ERROR;

+

+      dstReg->WriteMask = 0;

+

+      if (token[k] == 'x') {

+         dstReg->WriteMask |= WRITEMASK_X;

+         k++;

+      }

+      if (token[k] == 'y') {

+         dstReg->WriteMask |= WRITEMASK_Y;

+         k++;

+      }

+      if (token[k] == 'z') {

+         dstReg->WriteMask |= WRITEMASK_Z;

+         k++;

+      }

+      if (token[k] == 'w') {

+         dstReg->WriteMask |= WRITEMASK_W;

+         k++;

+      }

+      if (k == 0) {

+         RETURN_ERROR1("Invalid writemask character");

+      }

+

+   }

+   else {

+      dstReg->WriteMask = WRITEMASK_XYZW;

+   }

+

+   /* optional condition code mask */

+   if (Parse_String(parseState, "(")) {

+      /* ("EQ" | "GE" | "GT" | "LE" | "LT" | "NE" | "TR" | "FL".x|y|z|w) */

+      /* ("EQ" | "GE" | "GT" | "LE" | "LT" | "NE" | "TR" | "FL".[xyzw]) */

+      if (!Parse_CondCodeMask(parseState, dstReg))

+         RETURN_ERROR;

+

+      if (!Parse_String(parseState, ")"))  /* consume ")" */

+         RETURN_ERROR1("Expected )");

+

+      return GL_TRUE;

+   }

+   else {

+      /* no cond code mask */

+      dstReg->CondMask = COND_TR;

+      dstReg->CondSwizzle = SWIZZLE_NOOP;

+      return GL_TRUE;

+   }

+}

+

+

+/**

+ * Parse a vector source (register, constant, etc):

+ *   <vectorSrc>    ::= <absVectorSrc>

+ *                    | <baseVectorSrc>

+ *   <absVectorSrc> ::= <negate> "|" <baseVectorSrc> "|"

+ */

+static GLboolean

+Parse_VectorSrc(struct parse_state *parseState,

+                struct prog_src_register *srcReg)

+{

+   GLfloat sign = 1.0F;

+   GLubyte token[100];

+   GLint idx;

+   GLuint negateBase, negateAbs;

+

+   /*

+    * First, take care of +/- and absolute value stuff.

+    */

+   if (Parse_String(parseState, "-"))

+      sign = -1.0F;

+   else if (Parse_String(parseState, "+"))

+      sign = +1.0F;

+

+   if (Parse_String(parseState, "|")) {

+      srcReg->Abs = GL_TRUE;

+      negateAbs = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;

+

+      if (Parse_String(parseState, "-"))

+         negateBase = NEGATE_XYZW;

+      else if (Parse_String(parseState, "+"))

+         negateBase = NEGATE_NONE;

+      else

+         negateBase = NEGATE_NONE;

+   }

+   else {

+      srcReg->Abs = GL_FALSE;

+      negateAbs = NEGATE_NONE;

+      negateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;

+   }

+

+   srcReg->Negate = srcReg->Abs ? negateAbs : negateBase;

+

+   /* This should be the real src vector/register name */

+   if (!Peek_Token(parseState, token))

+      RETURN_ERROR;

+

+   /* Src reg can be Rn, Hn, f[n], p[n], a named parameter, a scalar

+    * literal or vector literal.

+    */

+   if (token[0] == 'R' || token[0] == 'H') {

+      srcReg->File = PROGRAM_TEMPORARY;

+      if (!Parse_TempReg(parseState, &idx))

+         RETURN_ERROR;

+      srcReg->Index = idx;

+   }

+   else if (token[0] == 'f') {

+      /* XXX this might be an identifier! */

+      srcReg->File = PROGRAM_INPUT;

+      if (!Parse_FragReg(parseState, &idx))

+         RETURN_ERROR;

+      srcReg->Index = idx;

+   }

+   else if (token[0] == 'p') {

+      /* XXX this might be an identifier! */

+      srcReg->File = PROGRAM_LOCAL_PARAM;

+      if (!Parse_ProgramParamReg(parseState, &idx))

+         RETURN_ERROR;

+      srcReg->Index = idx;

+   }

+   else if (IsLetter(token[0])){

+      GLubyte ident[100];

+      GLint paramIndex;

+      if (!Parse_Identifier(parseState, ident))

+         RETURN_ERROR;

+      paramIndex = _mesa_lookup_parameter_index(parseState->parameters,

+                                                -1, (const char *) ident);

+      if (paramIndex < 0) {

+         RETURN_ERROR2("Undefined constant or parameter: ", ident);

+      }

+      srcReg->File = PROGRAM_NAMED_PARAM;

+      srcReg->Index = paramIndex;      

+   }

+   else if (IsDigit(token[0]) || token[0] == '-' || token[0] == '+' || token[0] == '.'){

+      /* literal scalar constant */

+      GLfloat values[4];

+      GLuint paramIndex;

+      if (!Parse_ScalarConstant(parseState, values))

+         RETURN_ERROR;

+      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,

+                                              values, 4, NULL);

+      srcReg->File = PROGRAM_NAMED_PARAM;

+      srcReg->Index = paramIndex;

+   }

+   else if (token[0] == '{'){

+      /* literal vector constant */

+      GLfloat values[4];

+      GLuint paramIndex;

+      (void) Parse_String(parseState, "{");

+      if (!Parse_VectorConstant(parseState, values))

+         RETURN_ERROR;

+      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,

+                                              values, 4, NULL);

+      srcReg->File = PROGRAM_NAMED_PARAM;

+      srcReg->Index = paramIndex;      

+   }

+   else {

+      RETURN_ERROR2("Invalid source register name", token);

+   }

+

+   /* init swizzle fields */

+   srcReg->Swizzle = SWIZZLE_NOOP;

+

+   /* Look for optional swizzle suffix */

+   if (Parse_String(parseState, ".")) {

+      GLuint swz[4];

+

+      if (!Parse_Token(parseState, token))

+         RETURN_ERROR;

+

+      if (!Parse_SwizzleSuffix(token, swz))

+         RETURN_ERROR1("Invalid swizzle suffix");

+

+      srcReg->Swizzle = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);

+   }

+

+   /* Finish absolute value */

+   if (srcReg->Abs && !Parse_String(parseState, "|")) {

+      RETURN_ERROR1("Expected |");

+   }

+

+   return GL_TRUE;

+}

+

+

+static GLboolean

+Parse_ScalarSrcReg(struct parse_state *parseState,

+                   struct prog_src_register *srcReg)

+{

+   GLubyte token[100];

+   GLfloat sign = 1.0F;

+   GLboolean needSuffix = GL_TRUE;

+   GLint idx;

+   GLuint negateBase, negateAbs;

+

+   /*

+    * First, take care of +/- and absolute value stuff.

+    */

+   if (Parse_String(parseState, "-"))

+      sign = -1.0F;

+   else if (Parse_String(parseState, "+"))

+      sign = +1.0F;

+

+   if (Parse_String(parseState, "|")) {

+      srcReg->Abs = GL_TRUE;

+      negateAbs = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;

+

+      if (Parse_String(parseState, "-"))

+         negateBase = NEGATE_XYZW;

+      else if (Parse_String(parseState, "+"))

+         negateBase = NEGATE_NONE;

+      else

+         negateBase = NEGATE_NONE;

+   }

+   else {

+      srcReg->Abs = GL_FALSE;

+      negateAbs = NEGATE_NONE;

+      negateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;

+   }

+

+   srcReg->Negate = srcReg->Abs ? negateAbs : negateBase;

+

+   if (!Peek_Token(parseState, token))

+      RETURN_ERROR;

+

+   /* Src reg can be R<n>, H<n> or a named fragment attrib */

+   if (token[0] == 'R' || token[0] == 'H') {

+      srcReg->File = PROGRAM_TEMPORARY;

+      if (!Parse_TempReg(parseState, &idx))

+         RETURN_ERROR;

+      srcReg->Index = idx;

+   }

+   else if (token[0] == 'f') {

+      srcReg->File = PROGRAM_INPUT;

+      if (!Parse_FragReg(parseState, &idx))

+         RETURN_ERROR;

+      srcReg->Index = idx;

+   }

+   else if (token[0] == '{') {

+      /* vector literal */

+      GLfloat values[4];

+      GLuint paramIndex;

+      (void) Parse_String(parseState, "{");

+      if (!Parse_VectorConstant(parseState, values))

+         RETURN_ERROR;

+      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,

+                                              values, 4, NULL);

+      srcReg->File = PROGRAM_NAMED_PARAM;

+      srcReg->Index = paramIndex;      

+   }

+   else if (IsLetter(token[0])){

+      /* named param/constant */

+      GLubyte ident[100];

+      GLint paramIndex;

+      if (!Parse_Identifier(parseState, ident))

+         RETURN_ERROR;

+      paramIndex = _mesa_lookup_parameter_index(parseState->parameters,

+                                                -1, (const char *) ident);

+      if (paramIndex < 0) {

+         RETURN_ERROR2("Undefined constant or parameter: ", ident);

+      }

+      srcReg->File = PROGRAM_NAMED_PARAM;

+      srcReg->Index = paramIndex;      

+   }

+   else if (IsDigit(token[0])) {

+      /* scalar literal */

+      GLfloat values[4];

+      GLuint paramIndex;

+      if (!Parse_ScalarConstant(parseState, values))

+         RETURN_ERROR;

+      paramIndex = _mesa_add_unnamed_constant(parseState->parameters,

+                                              values, 4, NULL);

+      srcReg->Index = paramIndex;      

+      srcReg->File = PROGRAM_NAMED_PARAM;

+      needSuffix = GL_FALSE;

+   }

+   else {

+      RETURN_ERROR2("Invalid scalar source argument", token);

+   }

+

+   srcReg->Swizzle = 0;

+   if (needSuffix) {

+      /* parse .[xyzw] suffix */

+      if (!Parse_String(parseState, "."))

+         RETURN_ERROR1("Expected .");

+

+      if (!Parse_Token(parseState, token))

+         RETURN_ERROR;

+

+      if (token[0] == 'x' && token[1] == 0) {

+         srcReg->Swizzle = 0;

+      }

+      else if (token[0] == 'y' && token[1] == 0) {

+         srcReg->Swizzle = 1;

+      }

+      else if (token[0] == 'z' && token[1] == 0) {

+         srcReg->Swizzle = 2;

+      }

+      else if (token[0] == 'w' && token[1] == 0) {

+         srcReg->Swizzle = 3;

+      }

+      else {

+         RETURN_ERROR1("Invalid scalar source suffix");

+      }

+   }

+

+   /* Finish absolute value */

+   if (srcReg->Abs && !Parse_String(parseState, "|")) {

+      RETURN_ERROR1("Expected |");

+   }

+

+   return GL_TRUE;

+}

+

+

+static GLboolean

+Parse_PrintInstruction(struct parse_state *parseState,

+                       struct prog_instruction *inst)

+{

+   const GLubyte *str;

+   GLubyte *msg;

+   GLuint len;

+   GLint idx;

+

+   /* The first argument is a literal string 'just like this' */

+   if (!Parse_String(parseState, "'"))

+      RETURN_ERROR1("Expected '");

+

+   str = parseState->pos;

+   for (len = 0; str[len] != '\''; len++) /* find closing quote */

+      ;

+   parseState->pos += len + 1;

+   msg = (GLubyte*) malloc(len + 1);

+

+   memcpy(msg, str, len);

+   msg[len] = 0;

+   inst->Data = msg;

+

+   if (Parse_String(parseState, ",")) {

+      /* got an optional register to print */

+      GLubyte token[100];

+      GetToken(parseState, token);

+      if (token[0] == 'o') {

+         /* dst reg */

+         if (!Parse_OutputReg(parseState, &idx))

+            RETURN_ERROR;

+	 inst->SrcReg[0].Index = idx;

+         inst->SrcReg[0].File = PROGRAM_OUTPUT;

+      }

+      else {

+         /* src reg */

+         if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

+            RETURN_ERROR;

+      }

+   }

+   else {

+      inst->SrcReg[0].File = PROGRAM_UNDEFINED;

+   }

+

+   inst->SrcReg[0].Swizzle = SWIZZLE_NOOP;

+   inst->SrcReg[0].Abs = GL_FALSE;

+   inst->SrcReg[0].Negate = NEGATE_NONE;

+

+   return GL_TRUE;

+}

+

+

+static GLboolean

+Parse_InstructionSequence(struct parse_state *parseState,

+                          struct prog_instruction program[])

+{

+   while (1) {

+      struct prog_instruction *inst = program + parseState->numInst;

+      struct instruction_pattern instMatch;

+      GLubyte token[100];

+

+      /* Initialize the instruction */

+      _mesa_init_instructions(inst, 1);

+

+      /* special instructions */

+      if (Parse_String(parseState, "DEFINE")) {

+         GLubyte id[100];

+         GLfloat value[7];  /* yes, 7 to be safe */

+         if (!Parse_Identifier(parseState, id))

+            RETURN_ERROR;

+         /* XXX make sure id is not a reserved identifer, like R9 */

+         if (!Parse_String(parseState, "="))

+            RETURN_ERROR1("Expected =");

+         if (!Parse_VectorOrScalarConstant(parseState, value))

+            RETURN_ERROR;

+         if (!Parse_String(parseState, ";"))

+            RETURN_ERROR1("Expected ;");

+         if (_mesa_lookup_parameter_index(parseState->parameters,

+                                          -1, (const char *) id) >= 0) {

+            RETURN_ERROR2(id, "already defined");

+         }

+         _mesa_add_named_parameter(parseState->parameters,

+                                   (const char *) id, value);

+      }

+      else if (Parse_String(parseState, "DECLARE")) {

+         GLubyte id[100];

+         GLfloat value[7] = {0, 0, 0, 0, 0, 0, 0};  /* yes, to be safe */

+         if (!Parse_Identifier(parseState, id))

+            RETURN_ERROR;

+         /* XXX make sure id is not a reserved identifer, like R9 */

+         if (Parse_String(parseState, "=")) {

+            if (!Parse_VectorOrScalarConstant(parseState, value))

+               RETURN_ERROR;

+         }

+         if (!Parse_String(parseState, ";"))

+            RETURN_ERROR1("Expected ;");

+         if (_mesa_lookup_parameter_index(parseState->parameters,

+                                          -1, (const char *) id) >= 0) {

+            RETURN_ERROR2(id, "already declared");

+         }

+         _mesa_add_named_parameter(parseState->parameters,

+                                   (const char *) id, value);

+      }

+      else if (Parse_String(parseState, "END")) {

+         inst->Opcode = OPCODE_END;

+         parseState->numInst++;

+         if (Parse_Token(parseState, token)) {

+            RETURN_ERROR1("Code after END opcode.");

+         }

+         break;

+      }

+      else {

+         /* general/arithmetic instruction */

+

+         /* get token */

+         if (!Parse_Token(parseState, token)) {

+            RETURN_ERROR1("Missing END instruction.");

+         }

+

+         /* try to find matching instuction */

+         instMatch = MatchInstruction(token);

+         if (instMatch.opcode >= MAX_OPCODE) {

+            /* bad instruction name */

+            RETURN_ERROR2("Unexpected token: ", token);

+         }

+

+         inst->Opcode = instMatch.opcode;

+         inst->Precision = instMatch.suffixes & (_R | _H | _X);

+         inst->SaturateMode = (instMatch.suffixes & (_S))

+            ? SATURATE_ZERO_ONE : SATURATE_OFF;

+         inst->CondUpdate = (instMatch.suffixes & (_C)) ? GL_TRUE : GL_FALSE;

+

+         /*

+          * parse the input and output operands

+          */

+         if (instMatch.outputs == OUTPUT_S || instMatch.outputs == OUTPUT_V) {

+            if (!Parse_MaskedDstReg(parseState, &inst->DstReg))

+               RETURN_ERROR;

+            if (!Parse_String(parseState, ","))

+               RETURN_ERROR1("Expected ,");

+         }

+         else if (instMatch.outputs == OUTPUT_NONE) {

+            if (instMatch.opcode == OPCODE_KIL_NV) {

+               /* This is a little weird, the cond code info is in

+                * the dest register.

+                */

+               if (!Parse_CondCodeMask(parseState, &inst->DstReg))

+                  RETURN_ERROR;

+            }

+            else {

+               ASSERT(instMatch.opcode == OPCODE_PRINT);

+            }

+         }

+

+         if (instMatch.inputs == INPUT_1V) {

+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

+               RETURN_ERROR;

+         }

+         else if (instMatch.inputs == INPUT_2V) {

+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

+               RETURN_ERROR;

+            if (!Parse_String(parseState, ","))

+               RETURN_ERROR1("Expected ,");

+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))

+               RETURN_ERROR;

+         }

+         else if (instMatch.inputs == INPUT_3V) {

+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

+               RETURN_ERROR;

+            if (!Parse_String(parseState, ","))

+               RETURN_ERROR1("Expected ,");

+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))

+               RETURN_ERROR;

+            if (!Parse_String(parseState, ","))

+               RETURN_ERROR1("Expected ,");

+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[2]))

+               RETURN_ERROR;

+         }

+         else if (instMatch.inputs == INPUT_1S) {

+            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[0]))

+               RETURN_ERROR;

+         }

+         else if (instMatch.inputs == INPUT_2S) {

+            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[0]))

+               RETURN_ERROR;

+            if (!Parse_String(parseState, ","))

+               RETURN_ERROR1("Expected ,");

+            if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[1]))

+               RETURN_ERROR;

+         }

+         else if (instMatch.inputs == INPUT_CC) {

+            /* XXX to-do */

+         }

+         else if (instMatch.inputs == INPUT_1V_T) {

+	    GLubyte unit, idx;

+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

+               RETURN_ERROR;

+            if (!Parse_String(parseState, ","))

+               RETURN_ERROR1("Expected ,");

+            if (!Parse_TextureImageId(parseState, &unit, &idx))

+               RETURN_ERROR;

+	    inst->TexSrcUnit = unit;

+	    inst->TexSrcTarget = idx;

+         }

+         else if (instMatch.inputs == INPUT_3V_T) {

+	    GLubyte unit, idx;

+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[0]))

+               RETURN_ERROR;

+            if (!Parse_String(parseState, ","))

+               RETURN_ERROR1("Expected ,");

+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[1]))

+               RETURN_ERROR;

+            if (!Parse_String(parseState, ","))

+               RETURN_ERROR1("Expected ,");

+            if (!Parse_VectorSrc(parseState, &inst->SrcReg[2]))

+               RETURN_ERROR;

+            if (!Parse_String(parseState, ","))

+               RETURN_ERROR1("Expected ,");

+            if (!Parse_TextureImageId(parseState, &unit, &idx))

+               RETURN_ERROR;

+	    inst->TexSrcUnit = unit;

+	    inst->TexSrcTarget = idx;

+         }

+         else if (instMatch.inputs == INPUT_1V_S) {

+            if (!Parse_PrintInstruction(parseState, inst))

+               RETURN_ERROR;

+         }

+

+         /* end of statement semicolon */

+         if (!Parse_String(parseState, ";"))

+            RETURN_ERROR1("Expected ;");

+

+         parseState->numInst++;

+

+         if (parseState->numInst >= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS)

+            RETURN_ERROR1("Program too long");

+      }

+   }

+   return GL_TRUE;

+}

+

+

+

+/**

+ * Parse/compile the 'str' returning the compiled 'program'.

+ * ctx->Program.ErrorPos will be -1 if successful.  Otherwise, ErrorPos

+ * indicates the position of the error in 'str'.

+ */

+void

+_mesa_parse_nv_fragment_program(struct gl_context *ctx, GLenum dstTarget,

+                                const GLubyte *str, GLsizei len,

+                                struct gl_fragment_program *program)

+{

+   struct parse_state parseState;

+   struct prog_instruction instBuffer[MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS];

+   struct prog_instruction *newInst;

+   GLenum target;

+   GLubyte *programString;

+

+   /* Make a null-terminated copy of the program string */

+   programString = (GLubyte *) MALLOC(len + 1);

+   if (!programString) {

+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glLoadProgramNV");

+      return;

+   }

+   memcpy(programString, str, len);

+   programString[len] = 0;

+

+   /* Get ready to parse */

+   memset(&parseState, 0, sizeof(struct parse_state));

+   parseState.ctx = ctx;

+   parseState.start = programString;

+   parseState.program = program;

+   parseState.numInst = 0;

+   parseState.curLine = programString;

+   parseState.parameters = _mesa_new_parameter_list();

+

+   /* Reset error state */

+   _mesa_set_program_error(ctx, -1, NULL);

+

+   /* check the program header */

+   if (strncmp((const char *) programString, "!!FP1.0", 7) == 0) {

+      target = GL_FRAGMENT_PROGRAM_NV;

+      parseState.pos = programString + 7;

+   }

+   else if (strncmp((const char *) programString, "!!FCP1.0", 8) == 0) {

+      /* fragment / register combiner program - not supported */

+      _mesa_set_program_error(ctx, 0, "Invalid fragment program header");

+      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV(bad header)");

+      return;

+   }

+   else {

+      /* invalid header */

+      _mesa_set_program_error(ctx, 0, "Invalid fragment program header");

+      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV(bad header)");

+      return;

+   }

+

+   /* make sure target and header match */

+   if (target != dstTarget) {

+      _mesa_error(ctx, GL_INVALID_OPERATION,

+                  "glLoadProgramNV(target mismatch 0x%x != 0x%x)",

+                  target, dstTarget);

+      return;

+   }

+

+   if (Parse_InstructionSequence(&parseState, instBuffer)) {

+      GLuint u;

+      /* successful parse! */

+

+      if (parseState.outputsWritten == 0) {

+         /* must write at least one output! */

+         _mesa_error(ctx, GL_INVALID_OPERATION,

+                     "Invalid fragment program - no outputs written.");

+         return;

+      }

+

+      /* copy the compiled instructions */

+      assert(parseState.numInst <= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS);

+      newInst = _mesa_alloc_instructions(parseState.numInst);

+      if (!newInst) {

+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glLoadProgramNV");

+         return;  /* out of memory */

+      }

+      _mesa_copy_instructions(newInst, instBuffer, parseState.numInst);

+

+      /* install the program */

+      program->Base.Target = target;

+      if (program->Base.String) {

+         FREE(program->Base.String);

+      }

+      program->Base.String = programString;

+      program->Base.Format = GL_PROGRAM_FORMAT_ASCII_ARB;

+      if (program->Base.Instructions) {

+         free(program->Base.Instructions);

+      }

+      program->Base.Instructions = newInst;

+      program->Base.NumInstructions = parseState.numInst;

+      program->Base.InputsRead = parseState.inputsRead;

+      program->Base.OutputsWritten = parseState.outputsWritten;

+      for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++)

+         program->Base.TexturesUsed[u] = parseState.texturesUsed[u];

+

+      /* save program parameters */

+      program->Base.Parameters = parseState.parameters;

+

+      /* allocate registers for declared program parameters */

+#if 00

+      _mesa_assign_program_registers(&(program->SymbolTable));

+#endif

+

+#ifdef DEBUG_foo

+      printf("--- glLoadProgramNV(%d) result ---\n", program->Base.Id);

+      _mesa_fprint_program_opt(stdout, &program->Base, PROG_PRINT_NV, 0);

+      printf("----------------------------------\n");

+#endif

+   }

+   else {

+      /* Error! */

+      _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV");

+      /* NOTE: _mesa_set_program_error would have been called already */

+   }

+}

+

+

+const char *

+_mesa_nv_fragment_input_register_name(GLuint i)

+{

+   ASSERT(i < MAX_NV_FRAGMENT_PROGRAM_INPUTS);

+   return InputRegisters[i];

+}

+