1 /*****************************************************************************/
5 /* Symbol table management for the cc65 C compiler */
9 /* (C) 2000 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@musoftware.de */
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 /*****************************************************************************/
48 /*****************************************************************************/
50 /*****************************************************************************/
55 typedef struct SymTable SymTable;
57 SymTable* PrevTab; /* Pointer to higher level symbol table */
58 SymEntry* SymHead; /* Double linked list of symbols */
59 SymEntry* SymTail; /* Double linked list of symbols */
60 unsigned SymCount; /* Count of symbols in this table */
61 unsigned Size; /* Size of table */
62 SymEntry* Tab[1]; /* Actual table, dynamically allocated */
65 /* An empty symbol table */
66 extern SymTable EmptySymTab;
73 /*****************************************************************************/
74 /* Handling of lexical levels */
75 /*****************************************************************************/
79 void EnterGlobalLevel (void);
80 /* Enter the program global lexical level */
82 void LeaveGlobalLevel (void);
83 /* Leave the program global lexical level */
85 void EnterFunctionLevel (void);
86 /* Enter function lexical level */
88 void RememberFunctionLevel (struct FuncDesc* F);
89 /* Remember the symbol tables for the level and leave the level without checks */
91 void ReenterFunctionLevel (struct FuncDesc* F);
92 /* Reenter the function lexical level using the existing tables from F */
94 void LeaveFunctionLevel (void);
95 /* Leave function lexical level */
97 void EnterBlockLevel (void);
98 /* Enter a nested block in a function */
100 void LeaveBlockLevel (void);
101 /* Leave a nested block in a function */
103 void EnterStructLevel (void);
104 /* Enter a nested block for a struct definition */
106 void LeaveStructLevel (void);
107 /* Leave a nested block for a struct definition */
111 /*****************************************************************************/
113 /*****************************************************************************/
117 SymEntry* FindSym (const char* Name);
118 /* Find the symbol with the given name */
120 SymEntry* FindLocalSym (const char* Name);
121 /* Find the symbol with the given name in the current symbol table only */
123 SymEntry* FindTagSym (const char* Name);
124 /* Find the symbol with the given name in the tag table */
126 SymEntry* FindStructField (const type* TypeArray, const char* Name);
127 /* Find a struct field in the fields list */
131 /*****************************************************************************/
132 /* Add stuff to the symbol table */
133 /*****************************************************************************/
137 SymEntry* AddStructSym (const char* Name, unsigned Size, SymTable* Tab);
138 /* Add a struct/union entry and return it */
140 SymEntry* AddEnumSym (const char* Name, int Val);
141 /* Add an enum symbol to the symbol table and return it */
143 SymEntry* AddLabelSym (const char* Name, unsigned Flags);
144 /* Add a goto label to the symbol table */
146 SymEntry* AddLocalSym (const char* Name, type* Type, unsigned Flags, int Offs);
147 /* Add a local symbol and return the symbol entry */
149 SymEntry* AddGlobalSym (const char* Name, type* Type, unsigned Flags);
150 /* Add an external or global symbol to the symbol table and return the entry */
154 /*****************************************************************************/
156 /*****************************************************************************/
160 SymTable* GetSymTab (void);
161 /* Return the current symbol table */
163 int SymIsLocal (SymEntry* Sym);
164 /* Return true if the symbol is defined in the highest lexical level */
166 int EqualTypes (const type* t1, const type* t2);
167 /* Recursively compare two types. Return 1 if the types match, return 0
171 void MakeZPSym (const char* Name);
172 /* Mark the given symbol as zero page symbol */
174 void PrintSymTable (const SymTable* Tab, FILE* F, const char* Header, ...);
175 /* Write the symbol table to the given file */
177 void EmitExternals (void);
178 /* Write import/export statements for external symbols */
182 /* End of symtab.h */