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133 lines
5.1 KiB
C
133 lines
5.1 KiB
C
/*****************************************************************************/
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/* */
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/* sizeof.c */
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/* */
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/* Handle sizes of types and data */
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/* */
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/* */
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/* */
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/* (C) 2003-2011, Ullrich von Bassewit */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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/* common */
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#include "addrsize.h"
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/* ca65 */
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#include "expr.h"
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#include "sizeof.h"
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#include "symtab.h"
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* The name of the symbol used to encode the size. The name of this entry is
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** choosen so that it cannot be accessed by the user.
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*/
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static const StrBuf SizeEntryName = LIT_STRBUF_INITIALIZER (".size");
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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int IsSizeOfSymbol (const SymEntry* Sym)
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/* Return true if the given symbol is the one that encodes the size of some
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** entity. Sym may also be a NULL pointer in which case false is returned.
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*/
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{
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return (Sym != 0 && SB_Compare (GetSymName (Sym), &SizeEntryName) == 0);
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}
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SymEntry* FindSizeOfScope (SymTable* Scope)
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/* Get the size of a scope. The function returns the symbol table entry that
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** encodes the size or NULL if there is no such entry.
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*/
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{
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return SymFind (Scope, &SizeEntryName, SYM_FIND_EXISTING);
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}
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SymEntry* FindSizeOfSymbol (SymEntry* Sym)
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/* Get the size of a symbol table entry. The function returns the symbol table
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** entry that encodes the size of the symbol or NULL if there is no such entry.
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*/
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{
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return SymFindLocal (Sym, &SizeEntryName, SYM_FIND_EXISTING);
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}
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SymEntry* GetSizeOfScope (SymTable* Scope)
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/* Get the size of a scope. The function returns the symbol table entry that
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** encodes the size, and will create a new entry if it does not exist.
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*/
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{
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return SymFind (Scope, &SizeEntryName, SYM_ALLOC_NEW);
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}
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SymEntry* GetSizeOfSymbol (SymEntry* Sym)
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/* Get the size of a symbol table entry. The function returns the symbol table
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** entry that encodes the size of the symbol and will create a new one if it
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** does not exist.
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*/
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{
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return SymFindLocal (Sym, &SizeEntryName, SYM_ALLOC_NEW);
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}
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SymEntry* DefSizeOfScope (SymTable* Scope, long Size)
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/* Define the size of a scope and return the size symbol */
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{
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SymEntry* SizeSym = GetSizeOfScope (Scope);
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SymDef (SizeSym, GenLiteralExpr (Size), ADDR_SIZE_DEFAULT, SF_NONE);
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return SizeSym;
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}
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SymEntry* DefSizeOfSymbol (SymEntry* Sym, long Size)
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/* Define the size of a symbol and return the size symbol */
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{
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SymEntry* SizeSym = GetSizeOfSymbol (Sym);
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SymDef (SizeSym, GenLiteralExpr (Size), ADDR_SIZE_DEFAULT, SF_NONE);
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return SizeSym;
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}
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