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Revised symbol scoping

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2614 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
2003-11-06 11:22:31 +00:00
parent 4a667ead00
commit 8400fb848a
13 changed files with 682 additions and 596 deletions
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71
src/ca65/symtab.h
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@@ -59,10 +59,23 @@
#define SCOPE_GLOBAL 1
#define SCOPE_LOCAL 2
/* Flags used in SymDef */
#define SYM_DEFAULT 0x00
#define SYM_ZP 0x01
#define SYM_LABEL 0x02
/* A symbol table */
typedef struct SymTable SymTable;
struct SymTable {
SymTable* Left; /* Pointer to smaller entry */
SymTable* Right; /* Pointer to greater entry */
SymTable* Parent; /* Link to enclosing scope if any */
SymTable* Childs; /* Pointer to child scopes */
unsigned Level; /* Lexical level */
unsigned TableSlots; /* Number of hash table slots */
unsigned TableEntries; /* Number of entries in the table */
unsigned Name; /* Name of the scope */
SymEntry* Table[1]; /* Dynamic allocation */
};
/* Symbol tables */
SymTable* CurrentScope; /* Pointer to current symbol table */
SymTable* RootScope; /* Root symbol table */
@@ -78,20 +91,14 @@ void SymEnterLevel (const char* ScopeName);
void SymLeaveLevel (void);
/* Leave the current lexical level */
int SymIsLocalLevel (void);
/* Return true if we are on a local symbol table level. */
SymTable* SymFindScope (SymTable* Parent, const char* Name, unsigned Flags);
/* Find a scope in the given enclosing scope */
void SymDef (const char* Name, ExprNode* Expr, unsigned Flags);
/* Define a new symbol */
SymEntry* SymRef (const char* Name, int Scope);
/* Search for the symbol and return it */
int SymIsDef (const char* Name, int Scope);
/* Return true if the given symbol is already defined */
int SymIsRef (const char* Name, int Scope);
/* Return true if the given symbol has been referenced */
SymEntry* SymFind (SymTable* Scope, const char* Name, int AllocNew);
/* Find a new symbol table entry in the given table. If AllocNew is given and
* the entry is not found, create a new one. Return the entry found, or the
* new entry created, or - in case AllocNew is zero - return 0.
*/
void SymImport (const char* Name);
/* Mark the given symbol as an imported symbol */
@@ -129,36 +136,6 @@ int SymIsConst (SymEntry* Sym);
int SymIsZP (SymEntry* Sym);
/* Return true if the symbol is explicitly marked as zeropage symbol */
int SymIsImport (SymEntry* Sym);
/* Return true if the given symbol is marked as import */
int SymHasExpr (SymEntry* Sym);
/* Return true if the given symbol has an associated expression */
void SymMarkUser (SymEntry* Sym);
/* Set a user mark on the specified symbol */
void SymUnmarkUser (SymEntry* Sym);
/* Remove a user mark from the specified symbol */
int SymHasUserMark (SymEntry* Sym);
/* Return the state of the user mark for the specified symbol */
long GetSymVal (SymEntry* Sym);
/* Return the symbol value */
ExprNode* GetSymExpr (SymEntry* Sym);
/* Get the expression for a non-const symbol */
const char* GetSymName (SymEntry* Sym);
/* Return the name of the symbol */
unsigned GetSymIndex (SymEntry* Sym);
/* Return the symbol index for the given symbol */
const FilePos* GetSymPos (SymEntry* Sym);
/* Return the position of first occurence in the source for the given symbol */
void SymCheck (void);
/* Run through all symbols and check for anomalies and errors */