/* */
/* */
/* */
-/* (C) 2000 Ullrich von Bassewitz */
-/* Wacholderweg 14 */
-/* D-70597 Stuttgart */
-/* EMail: uz@musoftware.de */
+/* (C) 2000-2003 Ullrich von Bassewitz */
+/* Römerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* common */
#include "check.h"
+#include "debugflag.h"
#include "hashstr.h"
#include "xmalloc.h"
#define SYMTAB_SIZE_STRUCT 19U
#define SYMTAB_SIZE_LABEL 7U
-/* Predefined lexical levels */
-#define LEX_LEVEL_GLOBAL 1U
-
/* The current and root symbol tables */
static unsigned LexicalLevel = 0; /* For safety checks */
static SymTable* SymTab0 = 0;
* defined but not used.
*/
if (((Flags & SC_AUTO) || (Flags & SC_STATIC)) && (Flags & SC_EXTERN) == 0) {
- if ((Flags & SC_DEF) && !(Flags & SC_REF)) {
+ if (SymIsDef (Entry) && !SymIsRef (Entry)) {
if (Flags & SC_PARAM) {
Warning ("Parameter `%s' is never used", Entry->Name);
} else {
/* If the entry is a label, check if it was defined in the function */
if (Flags & SC_LABEL) {
- if ((Flags & SC_DEF) == 0) {
+ if (!SymIsDef (Entry)) {
/* Undefined label */
Error ("Undefined label: `%s'", Entry->Name);
- } else if ((Flags & SC_REF) == 0) {
+ } else if (!SymIsRef (Entry)) {
/* Defined but not used */
Warning ("`%s' is defined but never used", Entry->Name);
}
+unsigned GetLexicalLevel (void)
+/* Return the current lexical level */
+{
+ return LexicalLevel;
+}
+
+
+
void EnterGlobalLevel (void)
/* Enter the program global lexical level */
{
/* Dump the tables if requested */
if (Debug) {
- PrintSymTable (SymTab0, stdout, "Global symbol table");
- PrintSymTable (TagTab0, stdout, "Global tag table");
+ PrintSymTable (SymTab0, stdout, "Global symbol table");
+ PrintSymTable (TagTab0, stdout, "Global tag table");
}
/* Don't delete the symbol and struct tables! */
- SymTab0 = SymTab = 0;
- TagTab0 = TagTab = 0;
+ SymTab = 0;
+ TagTab = 0;
}
+SymEntry* FindGlobalSym (const char* Name)
+/* Find the symbol with the given name in the global symbol table only */
+{
+ return FindSymInTable (SymTab0, Name, HashStr (Name));
+}
+
+
+
SymEntry* FindLocalSym (const char* Name)
/* Find the symbol with the given name in the current symbol table only */
{
SymEntry* Entry = FindSymInTable (LabelTab, Name, HashStr (Name));
if (Entry) {
- if ((Entry->Flags & SC_DEF) != 0 && (Flags & SC_DEF) != 0) {
+ if (SymIsDef (Entry) && (Flags & SC_DEF) != 0) {
/* Trying to define the label more than once */
Error ("Label `%s' is defined more than once", Name);
}
/* Set the symbol attributes */
Entry->Type = TypeDup (Type);
- Entry->V.Offs = Offs;
+ if ((Flags & SC_AUTO) == SC_AUTO) {
+ Entry->V.Offs = Offs;
+ } else if ((Flags & SC_REGISTER) == SC_REGISTER) {
+ Entry->V.R.RegOffs = Offs;
+ Entry->V.R.SaveOffs = oursp; /* ### Cleaner! */
+ } else if ((Flags & SC_STATIC) == SC_STATIC) {
+ Entry->V.Label = Offs;
+ } else if ((Flags & SC_STRUCTFIELD) == SC_STRUCTFIELD) {
+ Entry->V.Offs = Offs;
+ } else {
+ Internal ("Invalid flags in AddLocalSym: %04X", Flags);
+ }
/* Add the entry to the symbol table */
AddSymEntry (SymTab, Entry);
SymEntry* AddGlobalSym (const char* Name, const type* Type, unsigned Flags)
/* Add an external or global symbol to the symbol table and return the entry */
{
+ /* There is some special handling for functions, so check if it is one */
+ int IsFunc = IsTypeFunc (Type);
+
/* Functions must be inserted in the global symbol table */
- SymTable* Tab = IsTypeFunc (Type)? SymTab0 : SymTab;
+ SymTable* Tab = IsFunc? SymTab0 : SymTab;
/* Do we have an entry with this name already? */
SymEntry* Entry = FindSymInTable (Tab, Name, HashStr (Name));
if (IsTypeArray (Type) && IsTypeArray (EType)) {
/* Get the array sizes */
- unsigned Size = Decode (Type + 1);
- unsigned ESize = Decode (EType + 1);
+ long Size = GetElementCount (Type);
+ long ESize = GetElementCount (EType);
- if ((Size != 0 && ESize != 0) ||
+ if ((Size != UNSPECIFIED && ESize != UNSPECIFIED && Size != ESize) ||
TypeCmp (Type+DECODE_SIZE+1, EType+DECODE_SIZE+1) < TC_EQUAL) {
/* Types not identical: Conflicting types */
Error ("Conflicting types for `%s'", Name);
return Entry;
} else {
/* Check if we have a size in the existing definition */
- if (ESize == 0) {
+ if (ESize == UNSPECIFIED) {
/* Existing, size not given, use size from new def */
Encode (EType + 1, Size);
}
* contains pointers to the new symbol tables that are needed if
* an actual function definition follows.
*/
- if (IsTypeFunc (Type)) {
- CopyEncode (Type+1, EType+1);
+ if (IsFunc) {
+ /* Get the function descriptor from the new type */
+ FuncDesc* F = GetFuncDesc (Type);
+ /* Use this new function descriptor */
+ Entry->V.F.Func = F;
+ EncodePtr (EType+1, F);
}
}
/* Set the symbol attributes */
Entry->Type = TypeDup (Type);
+ /* If this is a function, set the function descriptor and clear
+ * additional fields.
+ */
+ if (IsFunc) {
+ Entry->V.F.Func = GetFuncDesc (Entry->Type);
+ Entry->V.F.Seg = 0;
+ }
+
/* Add the entry to the symbol table */
AddSymEntry (Tab, Entry);
}
+SymTable* GetGlobalSymTab (void)
+/* Return the global symbol table */
+{
+ return SymTab0;
+}
+
+
+
int SymIsLocal (SymEntry* Sym)
/* Return true if the symbol is defined in the highest lexical level */
{
unsigned Flags = Entry->Flags;
if (Flags & SC_EXTERN) {
/* Only defined or referenced externs */
- if ((Flags & SC_REF) != 0 && (Flags & SC_DEF) == 0) {
+ if (SymIsRef (Entry) && !SymIsDef (Entry)) {
/* An import */
g_defimport (Entry->Name, Flags & SC_ZEROPAGE);
- } else if (Flags & SC_DEF) {
+ } else if (SymIsDef (Entry)) {
/* An export */
g_defexport (Entry->Name, Flags & SC_ZEROPAGE);
}
projects / cc65 / blobdiff