git.sur5r.net Git - cc65/blob - src/ca65/sizeof.c

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                 sizeof.c                                  */
   4 /*                                                                           */
   5 /*                      Handle sizes of types and data                       */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2003      Ullrich von Bassewitz                                       */
  10 /*               Römerstraße 52                                              */
  11 /*               D-70794 Filderstadt                                         */
  12 /* EMail:        uz@cc65.org                                                 */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 /* common */
  37 #include "addrsize.h"
  38
  39 /* ca65 */
  40 #include "expr.h"
  41 #include "sizeof.h"
  42 #include "symtab.h"
  43
  44
  45
  46 /*****************************************************************************/
  47 /*                                   Data                                    */
  48 /*****************************************************************************/
  49
  50
  51
  52 /* The name of the symbol used to encode the size. The name of this entry is
  53  * choosen so that it cannot be accessed by the user.
  54  */
  55 static const char SizeEntryName[] = ".size";
  56
  57
  58
  59
  60 /*****************************************************************************/
  61 /*                                   Code                                    */
  62 /*****************************************************************************/
  63
  64
  65
  66 SymEntry* GetSizeOfScope (SymTable* Scope)
  67 /* Get the size of a scope. The function returns the symbol table entry that
  68  * encodes the size, and will create a new entry if it does not exist.
  69  */
  70 {
  71     return SymFind (Scope, SizeEntryName, SYM_ALLOC_NEW);
  72 }
  73
  74
  75
  76 SymEntry* GetSizeOfSymbol (SymEntry* Sym)
  77 /* Get the size of a symbol table entry. The function returns the symbol table
  78  * entry that encodes the size of the symbol and will create a new one if it
  79  * does not exist.
  80  */
  81 {
  82     return SymFindLocal (Sym, SizeEntryName, SYM_ALLOC_NEW);
  83 }
  84
  85
  86
  87 SymEntry* DefSizeOfScope (SymTable* Scope, long Size)
  88 /* Define the size of a scope and return the size symbol */
  89 {
  90     SymEntry* SizeSym = GetSizeOfScope (Scope);
  91     SymDef (SizeSym, GenLiteralExpr (Size), ADDR_SIZE_DEFAULT, SF_NONE);
  92     return SizeSym;
  93 }
  94
  95
  96
  97 SymEntry* DefSizeOfSymbol (SymEntry* Sym, long Size)
  98 /* Define the size of a symbol and return the size symbol */
  99 {
 100     SymEntry* SizeSym = GetSizeOfSymbol (Sym);
 101     SymDef (SizeSym, GenLiteralExpr (Size), ADDR_SIZE_DEFAULT, SF_NONE);
 102     return SizeSym;
 103 }
 104
 105
 106