1 /*****************************************************************************/
5 /* Symbol table entries for the cc65 C compiler */
9 /* (C) 2000-2013, Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
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. */
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: */
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 */
32 /*****************************************************************************/
49 /*****************************************************************************/
51 /*****************************************************************************/
55 SymEntry* NewSymEntry (const char* Name, unsigned Flags)
56 /* Create a new symbol table with the given name */
58 /* Get the length of the name */
59 unsigned Len = strlen (Name);
61 /* Allocate memory for the symbol entry */
62 SymEntry* E = xmalloc (sizeof (SymEntry) + Len);
64 /* Initialize the entry */
75 memcpy (E->Name, Name, Len+1);
77 /* Return the new entry */
83 void FreeSymEntry (SymEntry* E)
84 /* Free a symbol entry */
91 if (E->Flags & SC_LABEL) {
92 for (i = 0; i < CollCount (E->V.L.DefsOrRefs); i++) {
93 xfree (CollAt (E->V.L.DefsOrRefs, i));
96 DoneCollection (E->V.L.DefsOrRefs);
104 void DumpSymEntry (FILE* F, const SymEntry* E)
105 /* Dump the given symbol table entry to the file in readable form */
107 static const struct {
111 /* Beware: Order is important! */
112 { "SC_TYPEDEF", SC_TYPEDEF },
113 { "SC_BITFIELD", SC_BITFIELD },
114 { "SC_STRUCTFIELD", SC_STRUCTFIELD },
115 { "SC_UNION", SC_UNION },
116 { "SC_STRUCT", SC_STRUCT },
117 { "SC_AUTO", SC_AUTO },
118 { "SC_REGISTER", SC_REGISTER },
119 { "SC_STATIC", SC_STATIC },
120 { "SC_EXTERN", SC_EXTERN },
121 { "SC_ENUM", SC_ENUM },
122 { "SC_CONST", SC_CONST },
123 { "SC_LABEL", SC_LABEL },
124 { "SC_PARAM", SC_PARAM },
125 { "SC_FUNC", SC_FUNC },
126 { "SC_STORAGE", SC_STORAGE },
127 { "SC_DEF", SC_DEF },
128 { "SC_REF", SC_REF },
129 { "SC_ZEROPAGE", SC_ZEROPAGE },
136 fprintf (F, "%s:\n", E->Name);
138 /* Print the assembler name if we have one */
140 fprintf (F, " AsmName: %s\n", E->AsmName);
143 /* Print the flags */
145 fprintf (F, " Flags:");
146 for (I = 0; I < sizeof (Flags) / sizeof (Flags[0]) && SymFlags != 0; ++I) {
147 if ((SymFlags & Flags[I].Val) == Flags[I].Val) {
148 SymFlags &= ~Flags[I].Val;
149 fprintf (F, " %s", Flags[I].Name);
153 fprintf (F, " 0x%05X", SymFlags);
158 fprintf (F, " Type: ");
160 PrintType (F, E->Type);
162 fprintf (F, "(none)");
169 int SymIsOutputFunc (const SymEntry* Sym)
170 /* Return true if this is a function that must be output */
172 /* Symbol must be a function which is defined and either extern or
173 ** static and referenced.
175 return IsTypeFunc (Sym->Type) &&
177 (Sym->Flags & (SC_REF | SC_EXTERN));
182 const DeclAttr* SymGetAttr (const SymEntry* Sym, DeclAttrType AttrType)
183 /* Return an attribute for this symbol or NULL if the attribute does not exist */
185 /* Beware: We may not even have a collection */
188 for (I = 0; I < CollCount (Sym->Attr); ++I) {
190 /* Get the next attribute */
191 const DeclAttr* A = CollConstAt (Sym->Attr, I);
193 /* If this is the one we're searching for, return it */
194 if (A->AttrType == AttrType) {
206 void SymUseAttr (SymEntry* Sym, struct Declaration* D)
207 /* Use the attributes from the declaration for this symbol */
209 /* We cannot specify attributes twice */
210 if ((Sym->Flags & SC_HAVEATTR) != 0) {
211 if (D->Attributes != 0) {
212 Error ("Attributes must be specified in the first declaration");
217 /* Move the attributes */
218 Sym->Attr = D->Attributes;
220 Sym->Flags |= SC_HAVEATTR;
225 void SymSetAsmName (SymEntry* Sym)
226 /* Set the assembler name for an external symbol from the name of the symbol */
230 /* Cannot be used to change the name */
231 PRECONDITION (Sym->AsmName == 0);
233 /* The assembler name starts with an underline */
234 Len = strlen (Sym->Name);
235 Sym->AsmName = xmalloc (Len + 2);
236 Sym->AsmName[0] = '_';
237 memcpy (Sym->AsmName+1, Sym->Name, Len+1);
242 void CvtRegVarToAuto (SymEntry* Sym)
243 /* Convert a register variable to an auto variable */
245 /* Change the storage class */
246 Sym->Flags = (Sym->Flags & ~(SC_REGISTER | SC_STATIC | SC_EXTERN)) | SC_AUTO;
248 /* Transfer the stack offset from register save area to actual offset */
249 Sym->V.Offs = Sym->V.R.SaveOffs;
254 void ChangeSymType (SymEntry* Entry, Type* T)
255 /* Change the type of the given symbol */
257 TypeFree (Entry->Type);
258 Entry->Type = TypeDup (T);
263 void ChangeAsmName (SymEntry* Entry, const char* NewAsmName)
264 /* Change the assembler name of the symbol */
266 xfree (Entry->AsmName);
267 Entry->AsmName = xstrdup (NewAsmName);
272 int HasAnonName (const SymEntry* Entry)
273 /* Return true if the symbol entry has an anonymous name */
275 return IsAnonName (Entry->Name);