/* */
/* */
/* */
-/* (C) 1998-2003 Ullrich von Bassewitz */
-/* Römerstraße 52 */
-/* D-70794 Filderstadt */
-/* EMail: uz@cc65.org */
+/* (C) 1998-2011, Ullrich von Bassewitz */
+/* Roemerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
-SymTable* ParseScopedIdent (char* Name, StrBuf* FullName)
-/* Parse a (possibly scoped) identifer. Name must point to a buffer big enough
- * to hold such an identifier. The scope of the name must exist and is returned
- * as function result, while the last part (the identifier) which may be either
- * a symbol or a scope depending on the context is returned in Name. FullName
- * is a string buffer that is used to store the full name of the identifier
- * including the scope. It is used internally and may be used by the caller
- * for error messages or similar.
+SymTable* ParseScopedIdent (StrBuf* Name, StrBuf* FullName)
+/* Parse a (possibly scoped) identifer. The scope of the name must exist and
+ * is returned as function result, while the last part (the identifier) which
+ * may be either a symbol or a scope depending on the context is returned in
+ * Name. FullName is a string buffer that is used to store the full name of
+ * the identifier including the scope. It is used internally and may be used
+ * by the caller for error messages or similar.
*/
{
- /* Get the starting table */
SymTable* Scope;
- if (Tok == TOK_NAMESPACE) {
+
+ /* Clear both passed string buffers */
+ SB_Clear (Name);
+ SB_Clear (FullName);
+
+ /* Get the starting table */
+ if (CurTok.Tok == TOK_NAMESPACE) {
/* Start from the root scope */
Scope = RootScope;
- } else if (Tok == TOK_IDENT) {
+ } else if (CurTok.Tok == TOK_IDENT) {
/* Remember the name and skip it */
- SB_AppendStr (FullName, strcpy (Name, SVal));
+ SB_Copy (Name, &CurTok.SVal);
NextTok ();
/* If no namespace symbol follows, we're already done */
- if (Tok != TOK_NAMESPACE) {
+ if (CurTok.Tok != TOK_NAMESPACE) {
SB_Terminate (FullName);
return CurrentScope;
}
+ /* Pass the scope back to the caller */
+ SB_Append (FullName, Name);
+
/* The scope must exist, so search for it starting with the current
* scope.
*/
if (Scope == 0) {
/* Scope not found */
SB_Terminate (FullName);
- Error ("No such scope: `%s'", SB_GetConstBuf (FullName));
+ Error ("No such scope: `%m%p'", FullName);
return 0;
}
/* Invalid token */
Error ("Identifier expected");
- SB_Terminate (FullName);
- Name[0] = '\0';
return 0;
}
while (1) {
/* Next token must be an identifier. */
- if (Tok != TOK_IDENT) {
+ if (CurTok.Tok != TOK_IDENT) {
Error ("Identifier expected");
- SB_Terminate (FullName);
- Name[0] = '\0';
return 0;
}
/* Remember and skip the identifier */
- SB_AppendStr (FullName, strcpy (Name, SVal));
+ SB_Copy (Name, &CurTok.SVal);
NextTok ();
/* If a namespace token follows, we search for another scope, otherwise
* the name is a symbol and we're done.
*/
- if (Tok != TOK_NAMESPACE) {
+ if (CurTok.Tok != TOK_NAMESPACE) {
/* Symbol */
- SB_Terminate (FullName);
return Scope;
}
+ /* Pass the scope back to the caller */
+ SB_Append (FullName, Name);
+
/* Search for the child scope */
Scope = SymFindScope (Scope, Name, SYM_FIND_EXISTING);
if (Scope == 0) {
/* Scope not found */
- SB_Terminate (FullName);
- Error ("No such scope: `%s'", SB_GetConstBuf (FullName));
+ Error ("No such scope: `%m%p'", FullName);
return 0;
}
* and return the symbol table entry.
*/
{
- StrBuf FullName = AUTO_STRBUF_INITIALIZER;
- char Ident[sizeof (SVal)];
+ StrBuf ScopeName = STATIC_STRBUF_INITIALIZER;
+ StrBuf Ident = STATIC_STRBUF_INITIALIZER;
+ int NoScope;
+ SymEntry* Sym;
/* Parse the scoped symbol name */
- SymTable* Scope = ParseScopedIdent (Ident, &FullName);
+ SymTable* Scope = ParseScopedIdent (&Ident, &ScopeName);
- /* We don't need FullName any longer */
- DoneStrBuf (&FullName);
+ /* If ScopeName is empty, no scope was specified */
+ NoScope = SB_IsEmpty (&ScopeName);
+
+ /* We don't need ScopeName any longer */
+ SB_Done (&ScopeName);
/* Check if the scope is valid. Errors have already been diagnosed by
* the routine, so just exit.
*/
if (Scope) {
- /* Search for the symbol and return it */
- return SymFind (Scope, Ident, AllocNew);
+ /* Search for the symbol and return it. If no scope was specified,
+ * search also in the upper levels.
+ */
+ if (NoScope && !AllocNew) {
+ Sym = SymFindAny (Scope, &Ident);
+ } else {
+ Sym = SymFind (Scope, &Ident, AllocNew);
+ }
} else {
/* No scope ==> no symbol. To avoid errors in the calling routine that
* may not expect NULL to be returned if AllocNew is true, create a new
* symbol.
*/
if (AllocNew) {
- return NewSymEntry (Ident);
+ Sym = NewSymEntry (&Ident, SF_NONE);
} else {
- return 0;
+ Sym = 0;
}
}
+
+ /* Deallocate memory for ident */
+ SB_Done (&Ident);
+
+ /* Return the symbol found */
+ return Sym;
}
* symbol space and return the symbol table struct.
*/
{
- StrBuf FullName = AUTO_STRBUF_INITIALIZER;
- char Ident[sizeof (SVal)];
+ StrBuf ScopeName = STATIC_STRBUF_INITIALIZER;
+ StrBuf Name = STATIC_STRBUF_INITIALIZER;
+ int NoScope;
+
/* Parse the scoped symbol name */
- SymTable* Scope = ParseScopedIdent (Ident, &FullName);
+ SymTable* Scope = ParseScopedIdent (&Name, &ScopeName);
+
+ /* If ScopeName is empty, no scope was specified */
+ NoScope = SB_IsEmpty (&ScopeName);
/* We don't need FullName any longer */
- DoneStrBuf (&FullName);
+ SB_Done (&ScopeName);
- /* Check if the scope is valid. Errors have already been diagnosed by
- * the routine, so just exit.
+ /* If we got no error, search for the child scope withint the enclosing one.
+ * Beware: If no explicit parent scope was specified, search in all upper
+ * levels.
*/
if (Scope) {
/* Search for the last scope */
- Scope = SymFindScope (Scope, Ident, SYM_FIND_EXISTING);
+ if (NoScope) {
+ Scope = SymFindAnyScope (Scope, &Name);
+ } else {
+ Scope = SymFindScope (Scope, &Name, SYM_FIND_EXISTING);
+ }
}
+
+ /* Free memory for name */
+ SB_Done (&Name);
+
+ /* Return the scope found */
return Scope;
}
+SymEntry* ParseAnySymName (int AllocNew)
+/* Parse a cheap local symbol or a a (possibly scoped) symbol name, search
+ * for it in the symbol table and return the symbol table entry.
+ */
+{
+ SymEntry* Sym;
+
+ /* Distinguish cheap locals and other symbols */
+ if (CurTok.Tok == TOK_LOCAL_IDENT) {
+ Sym = SymFindLocal (SymLast, &CurTok.SVal, AllocNew);
+ NextTok ();
+ } else {
+ Sym = ParseScopedSymName (AllocNew);
+ }
+
+ /* Return the symbol found */
+ return Sym;
+}
+
+
+