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Diffstat (limited to 'src/3rdparty/angle/src/compiler/preprocessor/symbols.c')
-rw-r--r-- | src/3rdparty/angle/src/compiler/preprocessor/symbols.c | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/preprocessor/symbols.c b/src/3rdparty/angle/src/compiler/preprocessor/symbols.c new file mode 100644 index 0000000000..f18b2569b3 --- /dev/null +++ b/src/3rdparty/angle/src/compiler/preprocessor/symbols.c @@ -0,0 +1,288 @@ +/****************************************************************************\ +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 +subject to these terms, NVIDIA grants you a personal, non-exclusive +license, under NVIDIA's copyrights in this original NVIDIA software (the +"NVIDIA Software"), to use, reproduce, modify and redistribute the +NVIDIA Software, with or without modifications, in source and/or binary +forms; provided that if you redistribute the NVIDIA Software, you must +retain the copyright notice of NVIDIA, this notice and the following +text and disclaimers in all such redistributions of the NVIDIA Software. +Neither the name, trademarks, service marks nor logos of NVIDIA +Corporation may be used to endorse or promote products derived from the +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 +works or by other works in which the NVIDIA Software may be +incorporated. No hardware is licensed hereunder. + +THE NVIDIA SOFTWARE IS BEING PROVIDED ON AN "AS IS" BASIS, WITHOUT +WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, +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 +OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE +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. +\****************************************************************************/ +// +// symbols.c +// + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "compiler/preprocessor/slglobals.h" + +#if defined(_MSC_VER) +#pragma warning(disable: 4706) +#endif + +/////////////////////////////////////////////////////////////////////////////////////////////// +/////////////////////////////////// Symbol Table Variables: /////////////////////////////////// +/////////////////////////////////////////////////////////////////////////////////////////////// + +Scope *ScopeList = NULL; +Scope *CurrentScope = NULL; +Scope *GlobalScope = NULL; + +static void unlinkScope(void *_scope) { + Scope *scope = _scope; + + if (scope->next) + scope->next->prev = scope->prev; + if (scope->prev) + scope->prev->next = scope->next; + else + ScopeList = scope->next; +} + +/* + * NewScope() + * + */ +Scope *NewScopeInPool(MemoryPool *pool) +{ + Scope *lScope; + + lScope = mem_Alloc(pool, sizeof(Scope)); + lScope->pool = pool; + lScope->parent = NULL; + lScope->funScope = NULL; + lScope->symbols = NULL; + + lScope->level = 0; + + lScope->programs = NULL; + if ((lScope->next = ScopeList)) + ScopeList->prev = lScope; + lScope->prev = 0; + ScopeList = lScope; + mem_AddCleanup(pool, unlinkScope, lScope); + return lScope; +} // NewScope + +/* + * PushScope() + * + */ + +void PushScope(Scope *fScope) +{ + Scope *lScope; + + if (CurrentScope) { + fScope->level = CurrentScope->level + 1; + if (fScope->level == 1) { + if (!GlobalScope) { + /* HACK - CTD -- if GlobalScope==NULL and level==1, we're + * defining a function in the superglobal scope. Things + * will break if we leave the level as 1, so we arbitrarily + * set it to 2 */ + fScope->level = 2; + } + } + if (fScope->level >= 2) { + lScope = fScope; + while (lScope->level > 2) + lScope = lScope->next; + fScope->funScope = lScope; + } + } else { + fScope->level = 0; + } + fScope->parent = CurrentScope; + CurrentScope = fScope; +} // PushScope + +/* + * PopScope() + * + */ + +Scope *PopScope(void) +{ + Scope *lScope; + + lScope = CurrentScope; + if (CurrentScope) + CurrentScope = CurrentScope->parent; + return lScope; +} // PopScope + +/* + * NewSymbol() - Allocate a new symbol node; + * + */ + +Symbol *NewSymbol(SourceLoc *loc, Scope *fScope, int name, symbolkind kind) +{ + Symbol *lSymb; + char *pch; + unsigned int ii; + + lSymb = (Symbol *) mem_Alloc(fScope->pool, sizeof(Symbol)); + lSymb->left = NULL; + lSymb->right = NULL; + lSymb->next = NULL; + lSymb->name = name; + lSymb->loc = *loc; + lSymb->kind = kind; + + // Clear union area: + + pch = (char *) &lSymb->details; + for (ii = 0; ii < sizeof(lSymb->details); ii++) + *pch++ = 0; + return lSymb; +} // NewSymbol + +/* + * lAddToTree() - Using a binary tree is not a good idea for basic atom values because they + * are generated in order. We'll fix this later (by reversing the bit pattern). + */ + +static void lAddToTree(Symbol **fSymbols, Symbol *fSymb) +{ + Symbol *lSymb; + int lrev, frev; + + lSymb = *fSymbols; + if (lSymb) { + frev = GetReversedAtom(atable, fSymb->name); + while (lSymb) { + lrev = GetReversedAtom(atable, lSymb->name); + if (lrev == frev) { + CPPErrorToInfoLog("GetAtomString(atable, fSymb->name)"); + break; + } else { + if (lrev > frev) { + if (lSymb->left) { + lSymb = lSymb->left; + } else { + lSymb->left = fSymb; + break; + } + } else { + if (lSymb->right) { + lSymb = lSymb->right; + } else { + lSymb->right = fSymb; + break; + } + } + } + } + } else { + *fSymbols = fSymb; + } +} // lAddToTree + + +/* + * AddSymbol() - Add a variable, type, or function name to a scope. + * + */ + +Symbol *AddSymbol(SourceLoc *loc, Scope *fScope, int atom, symbolkind kind) +{ + Symbol *lSymb; + + if (!fScope) + fScope = CurrentScope; + lSymb = NewSymbol(loc, fScope, atom, kind); + lAddToTree(&fScope->symbols, lSymb); + return lSymb; +} // AddSymbol + + +/*********************************************************************************************/ +/************************************ Symbol Semantic Functions ******************************/ +/*********************************************************************************************/ + +/* + * LookUpLocalSymbol() + * + */ + +Symbol *LookUpLocalSymbol(Scope *fScope, int atom) +{ + Symbol *lSymb; + int rname, ratom; + + ratom = GetReversedAtom(atable, atom); + if (!fScope) + fScope = CurrentScope; + lSymb = fScope->symbols; + while (lSymb) { + rname = GetReversedAtom(atable, lSymb->name); + if (rname == ratom) { + return lSymb; + } else { + if (rname > ratom) { + lSymb = lSymb->left; + } else { + lSymb = lSymb->right; + } + } + } + return NULL; +} // LookUpLocalSymbol + +/* + * LookUpSymbol() + * + */ + +Symbol *LookUpSymbol(Scope *fScope, int atom) +{ + Symbol *lSymb; + + if (!fScope) + fScope = CurrentScope; + while (fScope) { + lSymb = LookUpLocalSymbol(fScope, atom); + if (lSymb) + return lSymb; + fScope = fScope->parent; + } + return NULL; +} // LookUpSymbol + |