/* */
/* */
/* */
-/* (C) 1998-2003 Ullrich von Bassewitz */
-/* Römerstrasse 52 */
+/* (C) 1998-2004 Ullrich von Bassewitz */
+/* Römerstraße 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
#include <errno.h>
/* common */
+#include "addrsize.h"
+#include "mmodel.h"
#include "xmalloc.h"
/* cc65 */
#include "anonname.h"
#include "codegen.h"
#include "datatype.h"
+#include "declare.h"
#include "declattr.h"
#include "error.h"
#include "expr.h"
#include "pragma.h"
#include "scanner.h"
#include "symtab.h"
-#include "declare.h"
+#include "typeconv.h"
static type OptionalQualifiers (type Q)
/* Read type qualifiers if we have any */
{
- while (CurTok.Tok == TOK_CONST || CurTok.Tok == TOK_VOLATILE) {
+ while (TokIsTypeQual (&CurTok)) {
switch (CurTok.Tok) {
break;
default:
- /* Keep gcc silent */
- break;
+ Internal ("Unexpected type qualifier token: %d", CurTok.Tok);
}
static void InitDeclSpec (DeclSpec* D)
/* Initialize the DeclSpec struct for use */
{
- D->StorageClass = 0;
- D->Type[0] = T_END;
- D->Flags = 0;
+ D->StorageClass = 0;
+ D->Type[0] = T_END;
+ D->Flags = 0;
}
static void InitDeclaration (Declaration* D)
/* Initialize the Declaration struct for use */
{
- D->Ident[0] = '\0';
- D->Type[0] = T_END;
- D->T = D->Type;
+ D->Ident[0] = '\0';
+ D->Type[0] = T_END;
+ D->Index = 0;
+}
+
+
+
+static void NeedTypeSpace (Declaration* D, unsigned Count)
+/* Check if there is enough space for Count type specifiers within D */
+{
+ if (D->Index + Count >= MAXTYPELEN) {
+ /* We must call Fatal() here, since calling Error() will try to
+ * continue, and the declaration type is not correctly terminated
+ * in case we come here.
+ */
+ Fatal ("Too many type specifiers");
+ }
+}
+
+
+
+static void AddTypeToDeclaration (Declaration* D, type T)
+/* Add a type specifier to the type of a declaration */
+{
+ NeedTypeSpace (D, 1);
+ D->Type[D->Index++] = T;
+}
+
+
+
+static void AddEncodeToDeclaration (Declaration* D, type T, unsigned long Val)
+/* Add a type plus encoding to the type of a declaration */
+{
+ NeedTypeSpace (D, DECODE_SIZE+1);
+ D->Type[D->Index++] = T;
+ Encode (D->Type + D->Index, Val);
+ D->Index += DECODE_SIZE;
}
optionalsigned ();
optionalint ();
D->Type[0] = T_SHORT;
- D->Type[1] = T_END;
+ D->Type[1] = T_END;
}
break;
case TOK_CHAR:
NextToken ();
D->Type[0] = T_SCHAR;
- D->Type[1] = T_END;
+ D->Type[1] = T_END;
break;
case TOK_SHORT:
NextToken ();
/* FALL THROUGH */
- default:
+ default:
D->Type[0] = T_INT;
D->Type[1] = T_END;
break;
}
break;
+ case TOK_FLOAT:
+ NextToken ();
+ D->Type[0] = T_FLOAT;
+ D->Type[1] = T_END;
+ break;
+
+ case TOK_DOUBLE:
+ NextToken ();
+ D->Type[0] = T_DOUBLE;
+ D->Type[1] = T_END;
+ break;
+
case TOK_STRUCT:
case TOK_UNION:
StructType = (CurTok.Tok == TOK_STRUCT)? T_STRUCT : T_UNION;
ParseOldStyleParamList (F);
}
+ /* Remember the last function parameter. We need it later for several
+ * purposes, for example when passing stuff to fastcall functions. Since
+ * more symbols are added to the table, it is easier if we remember it
+ * now, since it is currently the last entry in the symbol table.
+ */
+ F->LastParam = GetSymTab()->SymTail;
+
/* Assign offsets. If the function has a variable parameter list,
* there's one additional byte (the arg size).
*/
Offs = (F->Flags & FD_VARIADIC)? 1 : 0;
- Sym = GetSymTab()->SymTail;
+ Sym = F->LastParam;
while (Sym) {
unsigned Size = CheckedSizeOf (Sym->Type);
if (SymIsRegVar (Sym)) {
Sym = Sym->PrevSym;
}
+ /* Add the default address size for the function */
+ if (CodeAddrSize == ADDR_SIZE_FAR) {
+ F->Flags |= FD_FAR;
+ } else {
+ F->Flags |= FD_NEAR;
+ }
+
/* Leave the lexical level remembering the symbol tables */
RememberFunctionLevel (F);
+static unsigned FunctionModifierFlags (void)
+/* Parse __fastcall__, __near__ and __far__ and return the matching FD_ flags */
+{
+ /* Read the flags */
+ unsigned Flags = FD_NONE;
+ while (CurTok.Tok == TOK_FASTCALL || CurTok.Tok == TOK_NEAR || CurTok.Tok == TOK_FAR) {
+
+ /* Get the flag bit for the next token */
+ unsigned F = FD_NONE;
+ switch (CurTok.Tok) {
+ case TOK_FASTCALL: F = FD_FASTCALL; break;
+ case TOK_NEAR: F = FD_NEAR; break;
+ case TOK_FAR: F = FD_FAR; break;
+ default: Internal ("Unexpected token: %d", CurTok.Tok);
+ }
+
+ /* Remember the flag for this modifier */
+ if (Flags & F) {
+ Error ("Duplicate modifier");
+ }
+ Flags |= F;
+
+ /* Skip the token */
+ NextToken ();
+ }
+
+ /* Sanity check */
+ if ((Flags & (FD_NEAR | FD_FAR)) == (FD_NEAR | FD_FAR)) {
+ Error ("Cannot specify both, `__near__' and `__far__' modifiers");
+ Flags &= ~(FD_NEAR | FD_FAR);
+ }
+
+ /* Return the flags read */
+ return Flags;
+}
+
+
+
+static void ApplyFunctionModifiers (type* T, unsigned Flags)
+/* Apply a set of function modifier flags to a function */
+{
+ /* Get the function descriptor */
+ FuncDesc* F = GetFuncDesc (T);
+
+ /* Special check for __fastcall__ */
+ if ((Flags & FD_FASTCALL) != 0 && IsVariadicFunc (T)) {
+ Error ("Cannot apply `__fastcall__' to functions with "
+ "variable parameter list");
+ Flags &= ~FD_FASTCALL;
+ }
+
+ /* Remove the default function address size modifiers */
+ F->Flags &= ~(FD_NEAR | FD_FAR);
+
+ /* Add the new modifers */
+ F->Flags |= Flags;
+}
+
+
+
static void Decl (const DeclSpec* Spec, Declaration* D, unsigned Mode)
/* Recursively process declarators. Build a type array in reverse order. */
{
-
+ /* Pointer to something */
if (CurTok.Tok == TOK_STAR) {
- type T = T_PTR;
+
+ type T;
+
+ /* Skip the star */
NextToken ();
+
/* Allow optional const or volatile qualifiers */
- T |= OptionalQualifiers (T_QUAL_NONE);
+ T = T_PTR | OptionalQualifiers (T_QUAL_NONE);
+
+ /* Parse the type, the pointer points to */
Decl (Spec, D, Mode);
- *D->T++ = T;
+
+ /* Add the type */
+ AddTypeToDeclaration (D, T);
return;
- } else if (CurTok.Tok == TOK_LPAREN) {
- NextToken ();
- Decl (Spec, D, Mode);
- ConsumeRParen ();
- } else if (CurTok.Tok == TOK_FASTCALL) {
+ }
+
+ /* Function modifiers */
+ if (CurTok.Tok == TOK_FASTCALL || CurTok.Tok == TOK_NEAR || CurTok.Tok == TOK_FAR) {
+
/* Remember the current type pointer */
- type* T = D->T;
- /* Skip the fastcall token */
- NextToken ();
+ type* T = D->Type + D->Index;
+
+ /* Read the flags */
+ unsigned Flags = FunctionModifierFlags ();
+
/* Parse the function */
Decl (Spec, D, Mode);
- /* Set the fastcall flag */
+
+ /* Check that we have a function */
if (!IsTypeFunc (T) && !IsTypeFuncPtr (T)) {
- Error ("__fastcall__ modifier applied to non function");
- } else if (IsVariadicFunc (T)) {
- Error ("Cannot apply __fastcall__ to functions with variable parameter list");
+ Error ("Function modifier applied to non function");
} else {
- FuncDesc* F = GetFuncDesc (T);
- F->Flags |= FD_FASTCALL;
- }
+ ApplyFunctionModifiers (T, Flags);
+ }
+
+ /* Done */
return;
+ }
+
+ if (CurTok.Tok == TOK_LPAREN) {
+ NextToken ();
+ Decl (Spec, D, Mode);
+ ConsumeRParen ();
} else {
/* Things depend on Mode now:
* - Mode == DM_NEED_IDENT means:
while (CurTok.Tok == TOK_LBRACK || CurTok.Tok == TOK_LPAREN) {
if (CurTok.Tok == TOK_LPAREN) {
+
/* Function declaration */
FuncDesc* F;
NextToken ();
+
/* Parse the function declaration */
F = ParseFuncDecl (Spec);
- *D->T++ = T_FUNC;
- EncodePtr (D->T, F);
- D->T += DECODE_SIZE;
+
+ /* Add the function type. Be sure to bounds check the type buffer */
+ AddEncodeToDeclaration (D, T_FUNC, (unsigned long) F);
} else {
/* Array declaration */
long Size = UNSPECIFIED;
Size = lval.ConstVal;
}
ConsumeRBrack ();
- *D->T++ = T_ARRAY;
- Encode (D->T, Size);
- D->T += DECODE_SIZE;
+
+ /* Add the type */
+ AddEncodeToDeclaration (D, T_ARRAY, Size);
}
}
}
ParseTypeSpec (&Spec, -1);
/* Parse additional declarators */
- InitDeclaration (&Decl);
ParseDecl (&Spec, &Decl, DM_NO_IDENT);
/* Copy the type to the target buffer */
Decl (Spec, D, Mode);
/* Add the base type. */
- TypeCpy (D->T, Spec->Type);
+ NeedTypeSpace (D, TypeLen (Spec->Type) + 1); /* Bounds check */
+ TypeCpy (D->Type + D->Index, Spec->Type);
/* Check the size of the generated type */
if (!IsTypeFunc (D->Type) && !IsTypeVoid (D->Type) && SizeOf (D->Type) >= 0x10000) {
-static unsigned ParseSimpleInit (type* T)
-/* Parse initializaton for simple data types. Return the number of data bytes. */
+static unsigned ParseScalarInit (type* T)
+/* Parse initializaton for scalar data types. Return the number of data bytes. */
{
- static const unsigned long Masks[] = {
- 0x000000FFUL, 0x0000FFFFUL, 0x00FFFFFFUL, 0xFFFFFFFFUL
- };
ExprDesc ED;
/* Optional opening brace */
unsigned BraceCount = OpeningCurlyBraces (0);
- /* Get the size of the expected type */
- unsigned Size = SizeOf (T);
- CHECK (Size > 0 && Size <= sizeof(Masks)/sizeof(Masks[0]));
+ /* We warn if an initializer for a scalar contains braces, because this is
+ * quite unusual and often a sign for some problem in the input.
+ */
+ if (BraceCount > 0) {
+ Warning ("Braces around scalar initializer");
+ }
+
+ /* Get the expression and convert it to the target type */
+ ConstExpr (&ED);
+ TypeConversion (&ED, T);
+
+ /* Output the data */
+ DefineData (&ED);
+
+ /* Close eventually opening braces */
+ ClosingCurlyBraces (BraceCount);
+
+ /* Done */
+ return SizeOf (T);
+}
+
+
+
+static unsigned ParsePointerInit (type* T)
+/* Parse initializaton for pointer data types. Return the number of data bytes. */
+{
+ /* Optional opening brace */
+ unsigned BraceCount = OpeningCurlyBraces (0);
/* Expression */
+ ExprDesc ED;
ConstExpr (&ED);
if ((ED.Flags & E_MCTYPE) == E_TCONST) {
/* Make the const value the correct size */
- ED.ConstVal &= Masks[Size-1];
+ ED.ConstVal &= 0xFFFF;
}
- assignadjust (T, &ED);
+ TypeConversion (&ED, T);
/* Output the data */
DefineData (&ED);
ClosingCurlyBraces (BraceCount);
/* Done */
- return Size;
+ return SIZEOF_PTR;
}
/* Translate into target charset */
TranslateLiteralPool (CurTok.IVal);
+
+ /* If the array is one too small for the string literal, omit the
+ * trailing zero.
+ */
+ if (ElementCount != UNSPECIFIED &&
+ ElementCount != FLEXIBLE &&
+ Count == ElementCount + 1) {
+ /* Omit the trailing zero */
+ --Count;
+ }
+
+ /* Output the data */
g_defbytes (Str, Count);
/* Remove string from pool */
case T_USHORT:
case T_INT:
case T_UINT:
- case T_PTR:
case T_LONG:
case T_ULONG:
- return ParseSimpleInit (T);
+ return ParseScalarInit (T);
+
+ case T_PTR:
+ return ParsePointerInit (T);
case T_ARRAY:
return ParseArrayInit (T, AllowFlexibleMembers);
}
}
-
+
unsigned ParseInit (type* T)
/* Parse initialization of variables. Return the number of data bytes. */
{
- return ParseInitInternal (T, !ANSI);
+ /* Parse the initialization */
+ unsigned Size = ParseInitInternal (T, !ANSI);
+
+ /* The initialization may not generate code on global level, because code
+ * outside function scope will never get executed.
+ */
+ if (HaveGlobalCode ()) {
+ Error ("Non constant initializers");
+ RemoveGlobalCode ();
+ }
+
+ /* Return the size needed for the initialization */
+ return Size;
}
projects / cc65 / blobdiff