1/*****************************************************************************/
2/* */
3/* sizeof.c */
4/* */
5/* Handle sizes of types and data */
6/* */
7/* */
8/* */
9/* (C) 2003-2011, Ullrich von Bassewit */
10/* Roemerstrasse 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*/
55static const StrBuf SizeEntryName = LIT_STRBUF_INITIALIZER (".size");
56
57
58
59/*****************************************************************************/
60/* Code */
61/*****************************************************************************/
62
63
64
65int IsSizeOfSymbol (const SymEntry* Sym)
66/* Return true if the given symbol is the one that encodes the size of some
67** entity. Sym may also be a NULL pointer in which case false is returned.
68*/
69{
70 return (Sym != 0 && SB_Compare (GetSymName (Sym), &SizeEntryName) == 0);
71}
72
73
74
75SymEntry* FindSizeOfScope (SymTable* Scope)
76/* Get the size of a scope. The function returns the symbol table entry that
77** encodes the size or NULL if there is no such entry.
78*/
79{
80 return SymFind (Scope, &SizeEntryName, SYM_FIND_EXISTING);
81}
82
83
84
85SymEntry* FindSizeOfSymbol (SymEntry* Sym)
86/* Get the size of a symbol table entry. The function returns the symbol table
87** entry that encodes the size of the symbol or NULL if there is no such entry.
88*/
89{
90 return SymFindLocal (Sym, &SizeEntryName, SYM_FIND_EXISTING);
91}
92
93
94
95SymEntry* GetSizeOfScope (SymTable* Scope)
96/* Get the size of a scope. The function returns the symbol table entry that
97** encodes the size, and will create a new entry if it does not exist.
98*/
99{
100 return SymFind (Scope, &SizeEntryName, SYM_ALLOC_NEW);
101}
102
103
104
105SymEntry* GetSizeOfSymbol (SymEntry* Sym)
106/* Get the size of a symbol table entry. The function returns the symbol table
107** entry that encodes the size of the symbol and will create a new one if it
108** does not exist.
109*/
110{
111 return SymFindLocal (Sym, &SizeEntryName, SYM_ALLOC_NEW);
112}
113
114
115
116SymEntry* DefSizeOfScope (SymTable* Scope, long Size)
117/* Define the size of a scope and return the size symbol */
118{
119 SymEntry* SizeSym = GetSizeOfScope (Scope);
120 SymDef (SizeSym, GenLiteralExpr (Size), ADDR_SIZE_DEFAULT, SF_NONE);
121 return SizeSym;
122}
123
124
125
126SymEntry* DefSizeOfSymbol (SymEntry* Sym, long Size)
127/* Define the size of a symbol and return the size symbol */
128{
129 SymEntry* SizeSym = GetSizeOfSymbol (Sym);
130 SymDef (SizeSym, GenLiteralExpr (Size), ADDR_SIZE_DEFAULT, SF_NONE);
131 return SizeSym;
132}
133