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Create a base GLSL front-end from the 3Dlabs glslang front-end from 20-Sep-2005.

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git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@19944 e7fa87d3-cd2b-0410-9028-fcbf551c1848
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John Kessenich 2012-12-12 21:15:54 +00:00
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//
//Copyright (C) 2002-2005 3Dlabs Inc. Ltd.
//All rights reserved.
//
//Redistribution and use in source and binary forms, with or without
//modification, are permitted provided that the following conditions
//are met:
//
// Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
//
// Neither the name of 3Dlabs Inc. Ltd. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
//FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
//COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
//INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
//BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
//LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
//CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
//LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
//ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
//POSSIBILITY OF SUCH DAMAGE.
//
/****************************************************************************\
Copyright (c) 2002, NVIDIA Corporation.
NVIDIA Corporation("NVIDIA") supplies this software to you in
consideration of your agreement to the following terms, and your use,
installation, modification or redistribution of this NVIDIA software
constitutes acceptance of these terms. If you do not agree with these
terms, please do not use, install, modify or redistribute this NVIDIA
software.
In consideration of your agreement to abide by the following terms, and
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"NVIDIA Software"), to use, reproduce, modify and redistribute the
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retain the copyright notice of NVIDIA, this notice and the following
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Neither the name, trademarks, service marks nor logos of NVIDIA
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NVIDIA Software without specific prior written permission from NVIDIA.
Except as expressly stated in this notice, no other rights or licenses
express or implied, are granted by NVIDIA herein, including but not
limited to any patent rights that may be infringed by your derivative
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THE NVIDIA SOFTWARE IS BEING PROVIDED ON AN "AS IS" BASIS, WITHOUT
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INCLUDING WITHOUT LIMITATION, WARRANTIES OR CONDITIONS OF TITLE,
NON-INFRINGEMENT, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
ITS USE AND OPERATION EITHER ALONE OR IN COMBINATION WITH OTHER
PRODUCTS.
IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT,
INCIDENTAL, EXEMPLARY, CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, LOST PROFITS; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) OR ARISING IN ANY WAY
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NVIDIA SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT,
TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF
NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\****************************************************************************/
//
// tokens.c
//
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "slglobals.h"
///////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////// Preprocessor and Token Recorder and Playback: ////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////
/*
* idstr()
* Copy a string to a malloc'ed block and convert it into something suitable
* for an ID
*
*/
static char *idstr(const char *fstr, MemoryPool *pool)
{
size_t len;
char *str, *t;
const char *f;
len = strlen(fstr);
if (!pool)
str = (char *) malloc(len + 1);
else
str = (char *) mem_Alloc(pool, len + 1);
for (f=fstr, t=str; *f; f++) {
if (isalnum(*f)) *t++ = *f;
else if (*f == '.' || *f == '/') *t++ = '_';
}
*t = 0;
return str;
} // idstr
/*
* lNewBlock()
*
*/
static TokenBlock *lNewBlock(TokenStream *fTok, MemoryPool *pool)
{
TokenBlock *lBlock;
if (!pool)
lBlock = (TokenBlock *) malloc(sizeof(TokenBlock) + 256);
else
lBlock = (TokenBlock *) mem_Alloc(pool, sizeof(TokenBlock) + 256);
lBlock->count = 0;
lBlock->current = 0;
lBlock->data = (unsigned char *) lBlock + sizeof(TokenBlock);
lBlock->max = 256;
lBlock->next = NULL;
if (fTok->head) {
fTok->current->next = lBlock;
} else {
fTok->head = lBlock;
}
fTok->current = lBlock;
return lBlock;
} // lNewBlock
/*
* lAddByte()
*
*/
static void lAddByte(TokenStream *fTok, unsigned char fVal)
{
TokenBlock *lBlock;
lBlock = fTok->current;
if (lBlock->count >= lBlock->max)
lBlock = lNewBlock(fTok, 0);
lBlock->data[lBlock->count++] = fVal;
} // lAddByte
/*
* lReadByte() - Get the next byte from a stream.
*
*/
static int lReadByte(TokenStream *pTok)
{
TokenBlock *lBlock;
int lval = -1;
lBlock = pTok->current;
if (lBlock) {
if (lBlock->current >= lBlock->count) {
lBlock = lBlock->next;
if (lBlock)
lBlock->current = 0;
pTok->current = lBlock;
}
if (lBlock)
lval = lBlock->data[lBlock->current++];
}
return lval;
} // lReadByte
/////////////////////////////////////// Global Functions://////////////////////////////////////
/*
* NewTokenStream()
*
*/
TokenStream *NewTokenStream(const char *name, MemoryPool *pool)
{
TokenStream *pTok;
if (!pool)
pTok = (TokenStream *) malloc(sizeof(TokenStream));
else
pTok = (TokenStream*)mem_Alloc(pool, sizeof(TokenStream));
pTok->next = NULL;
pTok->name = idstr(name, pool);
pTok->head = NULL;
pTok->current = NULL;
lNewBlock(pTok, pool);
return pTok;
} // NewTokenStream
/*
* DeleteTokenStream()
*
*/
void DeleteTokenStream(TokenStream *pTok)
{
TokenBlock *pBlock, *nBlock;
if (pTok) {
pBlock = pTok->head;
while (pBlock) {
nBlock = pBlock->next;
free(pBlock);
pBlock = nBlock;
}
if (pTok->name)
free(pTok->name);
free(pTok);
}
} // DeleteTokenStream
/*
* RecordToken() - Add a token to the end of a list for later playback or printout.
*
*/
void RecordToken(TokenStream *pTok, int token, yystypepp * yylvalpp)
{
const char *s;
unsigned char *str=NULL;
if (token > 256)
lAddByte(pTok, (unsigned char)((token & 0x7f) + 0x80));
else
lAddByte(pTok, (unsigned char)(token & 0x7f));
switch (token) {
case CPP_IDENTIFIER:
case CPP_TYPEIDENTIFIER:
case CPP_STRCONSTANT:
s = GetAtomString(atable, yylvalpp->sc_ident);
while (*s)
lAddByte(pTok, (unsigned char) *s++);
lAddByte(pTok, 0);
break;
case CPP_FLOATCONSTANT:
case CPP_INTCONSTANT:
str=yylvalpp->symbol_name;
while (*str){
lAddByte(pTok,(unsigned char) *str);
*str++;
}
lAddByte(pTok, 0);
break;
case '(':
lAddByte(pTok, (unsigned char)(yylvalpp->sc_int ? 1 : 0));
default:
break;
}
} // RecordToken
/*
* RewindTokenStream() - Reset a token stream in preperation for reading.
*
*/
void RewindTokenStream(TokenStream *pTok)
{
if (pTok->head) {
pTok->current = pTok->head;
pTok->current->current = 0;
}
} // RewindTokenStream
/*
* ReadToken() - Read the next token from a stream.
*
*/
int ReadToken(TokenStream *pTok, yystypepp * yylvalpp)
{
char symbol_name[MAX_SYMBOL_NAME_LEN + 1];
char string_val[MAX_STRING_LEN + 1];
int ltoken, len;
char ch;
ltoken = lReadByte(pTok);
if (ltoken >= 0) {
if (ltoken > 127)
ltoken += 128;
switch (ltoken) {
case CPP_IDENTIFIER:
case CPP_TYPEIDENTIFIER:
len = 0;
ch = lReadByte(pTok);
while ((ch >= 'a' && ch <= 'z') ||
(ch >= 'A' && ch <= 'Z') ||
(ch >= '0' && ch <= '9') ||
ch == '_')
{
if (len < MAX_SYMBOL_NAME_LEN) {
symbol_name[len] = ch;
len++;
ch = lReadByte(pTok);
}
}
symbol_name[len] = '\0';
assert(ch == '\0');
yylvalpp->sc_ident = LookUpAddString(atable, symbol_name);
return CPP_IDENTIFIER;
break;
case CPP_STRCONSTANT:
len = 0;
while ((ch = lReadByte(pTok)) != 0)
if (len < MAX_STRING_LEN)
string_val[len++] = ch;
string_val[len] = 0;
yylvalpp->sc_ident = LookUpAddString(atable, string_val);
break;
case CPP_FLOATCONSTANT:
len = 0;
ch = lReadByte(pTok);
while ((ch >= '0' && ch <= '9')||(ch=='e'||ch=='E'||ch=='.')||(ch=='+'||ch=='-'))
{
if (len < MAX_SYMBOL_NAME_LEN) {
symbol_name[len] = ch;
len++;
ch = lReadByte(pTok);
}
}
symbol_name[len] = '\0';
assert(ch == '\0');
strcpy(yylvalpp->symbol_name,symbol_name);
yylvalpp->sc_fval=(float)atof(yylvalpp->symbol_name);
break;
case CPP_INTCONSTANT:
len = 0;
ch = lReadByte(pTok);
while ((ch >= '0' && ch <= '9'))
{
if (len < MAX_SYMBOL_NAME_LEN) {
symbol_name[len] = ch;
len++;
ch = lReadByte(pTok);
}
}
symbol_name[len] = '\0';
assert(ch == '\0');
strcpy(yylvalpp->symbol_name,symbol_name);
yylvalpp->sc_int=atoi(yylvalpp->symbol_name);
break;
case '(':
yylvalpp->sc_int = lReadByte(pTok);
break;
}
return ltoken;
}
return EOF_SY;
} // ReadToken
typedef struct TokenInputSrc {
InputSrc base;
TokenStream *tokens;
int (*final)(CPPStruct *);
} TokenInputSrc;
static int scan_token(TokenInputSrc *in, yystypepp * yylvalpp)
{
int token = ReadToken(in->tokens, yylvalpp);
int (*final)(CPPStruct *);
cpp->tokenLoc->file = cpp->currentInput->name;
cpp->tokenLoc->line = cpp->currentInput->line;
if (token == '\n') {
in->base.line++;
return token;
}
if (token > 0) return token;
cpp->currentInput = in->base.prev;
final = in->final;
free(in);
if (final && !final(cpp)) return -1;
return cpp->currentInput->scan(cpp->currentInput, yylvalpp);
}
int ReadFromTokenStream(TokenStream *ts, int name, int (*final)(CPPStruct *))
{
TokenInputSrc *in = malloc(sizeof(TokenInputSrc));
memset(in, 0, sizeof(TokenInputSrc));
in->base.name = name;
in->base.prev = cpp->currentInput;
in->base.scan = (int (*)(InputSrc *, yystypepp *))scan_token;
in->base.line = 1;
in->tokens = ts;
in->final = final;
RewindTokenStream(ts);
cpp->currentInput = &in->base;
return 1;
}
typedef struct UngotToken {
InputSrc base;
int token;
yystypepp lval;
} UngotToken;
static int reget_token(UngotToken *t, yystypepp * yylvalpp)
{
int token = t->token;
*yylvalpp = t->lval;
cpp->currentInput = t->base.prev;
free(t);
return token;
}
void UngetToken(int token, yystypepp * yylvalpp) {
UngotToken *t = malloc(sizeof(UngotToken));
memset(t, 0, sizeof(UngotToken));
t->token = token;
t->lval = *yylvalpp;
t->base.scan = (void *)reget_token;
t->base.prev = cpp->currentInput;
t->base.name = cpp->currentInput->name;
t->base.line = cpp->currentInput->line;
cpp->currentInput = &t->base;
}
void DumpTokenStream(FILE *fp, TokenStream *s, yystypepp * yylvalpp) {
int token;
char str[100];
if (fp == 0) fp = stdout;
RewindTokenStream(s);
while ((token = ReadToken(s, yylvalpp)) > 0) {
switch (token) {
case CPP_IDENTIFIER:
case CPP_TYPEIDENTIFIER:
sprintf(str, "%s ", GetAtomString(atable, yylvalpp->sc_ident));
break;
case CPP_STRCONSTANT:
sprintf(str, "\"%s\"", GetAtomString(atable, yylvalpp->sc_ident));
break;
case CPP_FLOATCONSTANT:
//printf("%g9.6 ", yylvalpp->sc_fval);
break;
case CPP_INTCONSTANT:
//printf("%d ", yylvalpp->sc_int);
break;
default:
if (token >= 127)
sprintf(str, "%s ", GetAtomString(atable, token));
else
sprintf(str, "%c", token);
break;
}
CPPDebugLogMsg(str);
}
}
///////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////// End of tokens.c ///////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////