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 */
74 memcpy (E->Name, Name, Len+1);
76 /* Return the new entry */
82 void FreeSymEntry (SymEntry* E)
83 /* Free a symbol entry */
92 void DumpSymEntry (FILE* F, const SymEntry* E)
93 /* Dump the given symbol table entry to the file in readable form */
99 /* Beware: Order is important! */
100 { "SC_TYPEDEF", SC_TYPEDEF },
101 { "SC_BITFIELD", SC_BITFIELD },
102 { "SC_STRUCTFIELD", SC_STRUCTFIELD },
103 { "SC_UNION", SC_UNION },
104 { "SC_STRUCT", SC_STRUCT },
105 { "SC_AUTO", SC_AUTO },
106 { "SC_REGISTER", SC_REGISTER },
107 { "SC_STATIC", SC_STATIC },
108 { "SC_EXTERN", SC_EXTERN },
109 { "SC_ENUM", SC_ENUM },
110 { "SC_CONST", SC_CONST },
111 { "SC_LABEL", SC_LABEL },
112 { "SC_PARAM", SC_PARAM },
113 { "SC_FUNC", SC_FUNC },
114 { "SC_STORAGE", SC_STORAGE },
115 { "SC_DEF", SC_DEF },
116 { "SC_REF", SC_REF },
117 { "SC_ZEROPAGE", SC_ZEROPAGE },
124 fprintf (F, "%s:\n", E->Name);
126 /* Print the assembler name if we have one */
128 fprintf (F, " AsmName: %s\n", E->AsmName);
131 /* Print the flags */
133 fprintf (F, " Flags: ");
134 for (I = 0; I < sizeof (Flags) / sizeof (Flags[0]) && SymFlags != 0; ++I) {
135 if ((SymFlags & Flags[I].Val) == Flags[I].Val) {
136 SymFlags &= ~Flags[I].Val;
137 fprintf (F, "%s ", Flags[I].Name);
141 fprintf (F, "%04X", SymFlags);
146 fprintf (F, " Type: ");
148 PrintType (F, E->Type);
150 fprintf (F, "(none)");
157 int SymIsOutputFunc (const SymEntry* Sym)
158 /* Return true if this is a function that must be output */
160 /* Symbol must be a function which is defined and either extern or
161 * static and referenced.
163 return IsTypeFunc (Sym->Type) &&
165 (Sym->Flags & (SC_REF | SC_EXTERN));
170 const DeclAttr* SymGetAttr (const SymEntry* Sym, DeclAttrType AttrType)
171 /* Return an attribute for this symbol or NULL if the attribute does not exist */
173 /* Beware: We may not even have a collection */
176 for (I = 0; I < CollCount (Sym->Attr); ++I) {
178 /* Get the next attribute */
179 const DeclAttr* A = CollConstAt (Sym->Attr, I);
181 /* If this is the one we're searching for, return it */
182 if (A->AttrType == AttrType) {
194 void SymUseAttr (SymEntry* Sym, struct Declaration* D)
195 /* Use the attributes from the declaration for this symbol */
197 /* We cannot specify attributes twice */
198 if ((Sym->Flags & SC_HAVEATTR) != 0) {
199 if (D->Attributes != 0) {
200 Error ("Attributes must be specified in the first declaration");
205 /* Move the attributes */
206 Sym->Attr = D->Attributes;
208 Sym->Flags |= SC_HAVEATTR;
213 void SymSetAsmName (SymEntry* Sym)
214 /* Set the assembler name for an external symbol from the name of the symbol */
218 /* Cannot be used to change the name */
219 PRECONDITION (Sym->AsmName == 0);
221 /* The assembler name starts with an underline */
222 Len = strlen (Sym->Name);
223 Sym->AsmName = xmalloc (Len + 2);
224 Sym->AsmName[0] = '_';
225 memcpy (Sym->AsmName+1, Sym->Name, Len+1);
230 void CvtRegVarToAuto (SymEntry* Sym)
231 /* Convert a register variable to an auto variable */
233 /* Change the storage class */
234 Sym->Flags = (Sym->Flags & ~(SC_REGISTER | SC_STATIC | SC_EXTERN)) | SC_AUTO;
236 /* Transfer the stack offset from register save area to actual offset */
237 Sym->V.Offs = Sym->V.R.SaveOffs;
242 void ChangeSymType (SymEntry* Entry, Type* T)
243 /* Change the type of the given symbol */
245 TypeFree (Entry->Type);
246 Entry->Type = TypeDup (T);
251 void ChangeAsmName (SymEntry* Entry, const char* NewAsmName)
252 /* Change the assembler name of the symbol */
254 xfree (Entry->AsmName);
255 Entry->AsmName = xstrdup (NewAsmName);
260 int HasAnonName (const SymEntry* Entry)
261 /* Return true if the symbol entry has an anonymous name */
263 return IsAnonName (Entry->Name);