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44//
45// symbols.h
46//
47
48#if !defined(__SYMBOLS_H)
49#define __SYMBOLS_H 1
50
51#include "compiler/preprocessor/memory.h"
52
53typedef enum symbolkind {
54   MACRO_S
55} symbolkind;
56
57// Typedefs for things defined here in "symbols.h":
58
59typedef struct Scope_Rec Scope;
60typedef struct Symbol_Rec Symbol;
61
62typedef struct SymbolList_Rec {
63    struct SymbolList_Rec *next;
64    Symbol *symb;
65} SymbolList;
66
67struct Scope_Rec {
68    Scope *next, *prev;     // doubly-linked list of all scopes
69    Scope *parent;
70    Scope *funScope;        // Points to base scope of enclosing function
71    MemoryPool *pool;       // pool used for allocation in this scope
72    Symbol *symbols;
73
74	int level;              // 0 = super globals, 1 = globals, etc.
75
76    // Only used at global scope (level 1):
77    SymbolList *programs;   // List of programs for this compilation.
78};
79
80
81// Symbol table is a simple binary tree.
82
83#include "compiler/preprocessor/cpp.h"        // to get MacroSymbol def
84
85struct Symbol_Rec {
86    Symbol *left, *right;
87    Symbol *next;
88    int name;       // Name atom
89    SourceLoc loc;
90    symbolkind kind;
91    union {
92        MacroSymbol mac;
93    } details;
94};
95
96extern Scope *CurrentScope;
97extern Scope *GlobalScope;
98extern Scope *ScopeList;
99
100Scope *NewScopeInPool(MemoryPool *);
101#define NewScope()      NewScopeInPool(CurrentScope->pool)
102void PushScope(Scope *fScope);
103Scope *PopScope(void);
104Symbol *NewSymbol(SourceLoc *loc, Scope *fScope, int name, symbolkind kind);
105Symbol *AddSymbol(SourceLoc *loc, Scope *fScope, int atom, symbolkind kind);
106Symbol *LookUpLocalSymbol(Scope *fScope, int atom);
107Symbol *LookUpSymbol(Scope *fScope, int atom);
108void CPPErrorToInfoLog(char *);
109
110
111#endif // !defined(__SYMBOLS_H)
112
113