/* */
/* */
/* */
-/* (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 void ParseTypeSpec (DeclSpec* D, int Default);
/* Parse a type specificier */
+static unsigned ParseInitInternal (type* T, int AllowFlexibleMembers);
+/* Parse initialization of variables. Return the number of data bytes. */
+
/*****************************************************************************/
}
FlexibleMember = 1;
/* Assume zero for size calculations */
- Encode (Decl.Type + 1, 0);
+ Encode (Decl.Type + 1, FLEXIBLE);
} else {
StructSize += CheckedSizeOf (Decl.Type);
}
optionalsigned ();
optionalint ();
D->Type[0] = T_SHORT;
- D->Type[1] = T_END;
+ D->Type[1] = T_END;
}
break;
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;
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 ();
+
+ /* 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:
ParseTypeSpec (&Spec, -1);
/* Parse additional declarators */
- InitDeclaration (&Decl);
ParseDecl (&Spec, &Decl, DM_NO_IDENT);
/* Copy the type to the target buffer */
-static unsigned ParseVoidInit (void)
-/* Parse an initialization of a void variable (special cc65 extension).
- * Return the number of bytes initialized.
+static void SkipInitializer (unsigned BracesExpected)
+/* Skip the remainder of an initializer in case of errors. Try to be somewhat
+ * smart so we don't have too many following errors.
*/
{
- ExprDesc lval;
- unsigned Size;
+ while (CurTok.Tok != TOK_CEOF && CurTok.Tok != TOK_SEMI && BracesExpected > 0) {
+ switch (CurTok.Tok) {
+ case TOK_RCURLY: --BracesExpected; break;
+ case TOK_LCURLY: ++BracesExpected; break;
+ default: break;
+ }
+ NextToken ();
+ }
+}
- ConsumeLCurly ();
- /* Allow an arbitrary list of values */
- Size = 0;
- do {
- ConstExpr (&lval);
- switch (UnqualifiedType (lval.Type[0])) {
- case T_SCHAR:
- case T_UCHAR:
- if ((lval.Flags & E_MCTYPE) == E_TCONST) {
- /* Make it byte sized */
- lval.ConstVal &= 0xFF;
- }
- DefineData (&lval);
- Size += SIZEOF_CHAR;
- break;
+static unsigned OpeningCurlyBraces (unsigned BracesNeeded)
+/* Accept any number of opening curly braces around an initialization, skip
+ * them and return the number. If the number of curly braces is less than
+ * BracesNeeded, issue a warning.
+ */
+{
+ unsigned BraceCount = 0;
+ while (CurTok.Tok == TOK_LCURLY) {
+ ++BraceCount;
+ NextToken ();
+ }
+ if (BraceCount < BracesNeeded) {
+ Error ("`{' expected");
+ }
+ return BraceCount;
+}
- case T_SHORT:
- case T_USHORT:
- case T_INT:
- case T_UINT:
- case T_PTR:
- case T_ARRAY:
- if ((lval.Flags & E_MCTYPE) == E_TCONST) {
- /* Make it word sized */
- lval.ConstVal &= 0xFFFF;
- }
- DefineData (&lval);
- Size += SIZEOF_INT;
- break;
- case T_LONG:
- case T_ULONG:
- DefineData (&lval);
- Size += SIZEOF_LONG;
- break;
- default:
- Error ("Illegal type in initialization");
- break;
+static void ClosingCurlyBraces (unsigned BracesExpected)
+/* Accept and skip the given number of closing curly braces together with
+ * an optional comma. Output an error messages, if the input does not contain
+ * the expected number of braces.
+ */
+{
+ while (BracesExpected) {
+ if (CurTok.Tok == TOK_RCURLY) {
+ NextToken ();
+ } else if (CurTok.Tok == TOK_COMMA && NextTok.Tok == TOK_RCURLY) {
+ NextToken ();
+ NextToken ();
+ } else {
+ Error ("`}' expected");
+ return;
+ }
+ --BracesExpected;
+ }
+}
- }
- if (CurTok.Tok != TOK_COMMA) {
- break;
- }
- NextToken ();
- } while (CurTok.Tok != TOK_RCURLY);
+static unsigned ParseScalarInit (type* T)
+/* Parse initializaton for scalar data types. Return the number of data bytes. */
+{
+ ExprDesc ED;
- /* Closing brace */
- ConsumeRCurly ();
+ /* Optional opening brace */
+ unsigned BraceCount = OpeningCurlyBraces (0);
- /* Return the number of bytes initialized */
- return Size;
+ /* 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, 0, T);
+
+ /* Output the data */
+ DefineData (&ED);
+
+ /* Close eventually opening braces */
+ ClosingCurlyBraces (BraceCount);
+
+ /* Done */
+ return SizeOf (T);
}
-static unsigned ParseStructInit (type* Type)
+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 &= 0xFFFF;
+ }
+ TypeConversion (&ED, 0, T);
+
+ /* Output the data */
+ DefineData (&ED);
+
+ /* Close eventually opening braces */
+ ClosingCurlyBraces (BraceCount);
+
+ /* Done */
+ return SIZEOF_PTR;
+}
+
+
+
+static unsigned ParseArrayInit (type* T, int AllowFlexibleMembers)
+/* Parse initializaton for arrays. Return the number of data bytes. */
+{
+ int Count;
+
+ /* Get the array data */
+ type* ElementType = GetElementType (T);
+ unsigned ElementSize = CheckedSizeOf (ElementType);
+ long ElementCount = GetElementCount (T);
+
+ /* Special handling for a character array initialized by a literal */
+ if (IsTypeChar (ElementType) && CurTok.Tok == TOK_SCONST) {
+
+ /* Char array initialized by string constant */
+ const char* Str = GetLiteral (CurTok.IVal);
+ Count = GetLiteralPoolOffs () - CurTok.IVal;
+
+ /* 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 */
+ ResetLiteralPoolOffs (CurTok.IVal);
+ NextToken ();
+
+ } else {
+
+ /* Curly brace */
+ ConsumeLCurly ();
+
+ /* Initialize the array members */
+ Count = 0;
+ while (CurTok.Tok != TOK_RCURLY) {
+ /* Flexible array members may not be initialized within
+ * an array (because the size of each element may differ
+ * otherwise).
+ */
+ ParseInitInternal (ElementType, 0);
+ ++Count;
+ if (CurTok.Tok != TOK_COMMA)
+ break;
+ NextToken ();
+ }
+
+ /* Closing curly braces */
+ ConsumeRCurly ();
+ }
+
+
+ if (ElementCount == UNSPECIFIED) {
+ /* Number of elements determined by initializer */
+ Encode (T + 1, Count);
+ ElementCount = Count;
+ } else if (ElementCount == FLEXIBLE && AllowFlexibleMembers) {
+ /* In non ANSI mode, allow initialization of flexible array
+ * members.
+ */
+ ElementCount = Count;
+ } else if (Count < ElementCount) {
+ g_zerobytes ((ElementCount - Count) * ElementSize);
+ } else if (Count > ElementCount) {
+ Error ("Too many initializers");
+ }
+ return ElementCount * ElementSize;
+}
+
+
+
+static unsigned ParseStructInit (type* Type, int AllowFlexibleMembers)
/* Parse initialization of a struct or union. Return the number of data bytes. */
{
SymEntry* Entry;
unsigned StructSize;
unsigned Size;
+
/* Consume the opening curly brace */
ConsumeLCurly ();
Tab = Entry->V.S.SymTab;
if (Tab == 0) {
Error ("Cannot initialize variables with incomplete type");
- /* Returning here will cause lots of errors, but recovery is difficult */
+ /* Try error recovery */
+ SkipInitializer (1);
+ /* Nothing initialized */
return 0;
}
while (CurTok.Tok != TOK_RCURLY) {
if (Entry == 0) {
Error ("Too many initializers");
+ SkipInitializer (1);
return Size;
}
- Size += ParseInit (Entry->Type);
+ /* Parse initialization of one field. Flexible array members may
+ * only be initialized if they are the last field (or part of the
+ * last struct field).
+ */
+ Size += ParseInitInternal (Entry->Type, AllowFlexibleMembers && Entry->NextSym == 0);
Entry = Entry->NextSym;
if (CurTok.Tok != TOK_COMMA)
break;
/* If there are struct fields left, reserve additional storage */
if (Size < StructSize) {
g_zerobytes (StructSize - Size);
+ Size = StructSize;
}
+ /* Return the actual number of bytes initialized. This number may be
+ * larger than StructSize if flexible array members are present and were
+ * initialized (possible in non ANSI mode).
+ */
+ return Size;
+}
+
+
+
+static unsigned ParseVoidInit (void)
+/* Parse an initialization of a void variable (special cc65 extension).
+ * Return the number of bytes initialized.
+ */
+{
+ ExprDesc lval;
+ unsigned Size;
+
+ /* Opening brace */
+ ConsumeLCurly ();
+
+ /* Allow an arbitrary list of values */
+ Size = 0;
+ do {
+ ConstExpr (&lval);
+ switch (UnqualifiedType (lval.Type[0])) {
+
+ case T_SCHAR:
+ case T_UCHAR:
+ if ((lval.Flags & E_MCTYPE) == E_TCONST) {
+ /* Make it byte sized */
+ lval.ConstVal &= 0xFF;
+ }
+ DefineData (&lval);
+ Size += SIZEOF_CHAR;
+ break;
+
+ case T_SHORT:
+ case T_USHORT:
+ case T_INT:
+ case T_UINT:
+ case T_PTR:
+ case T_ARRAY:
+ if ((lval.Flags & E_MCTYPE) == E_TCONST) {
+ /* Make it word sized */
+ lval.ConstVal &= 0xFFFF;
+ }
+ DefineData (&lval);
+ Size += SIZEOF_INT;
+ break;
+
+ case T_LONG:
+ case T_ULONG:
+ DefineData (&lval);
+ Size += SIZEOF_LONG;
+ break;
+
+ default:
+ Error ("Illegal type in initialization");
+ break;
+
+ }
+
+ if (CurTok.Tok != TOK_COMMA) {
+ break;
+ }
+ NextToken ();
+
+ } while (CurTok.Tok != TOK_RCURLY);
+
+ /* Closing brace */
+ ConsumeRCurly ();
+
/* Return the number of bytes initialized */
- return StructSize;
+ return Size;
}
-unsigned ParseInit (type* T)
+static unsigned ParseInitInternal (type* T, int AllowFlexibleMembers)
/* Parse initialization of variables. Return the number of data bytes. */
{
- ExprDesc lval;
- type* t;
- const char* str;
- int Count;
- long ElementCount;
- unsigned ElementSize;
-
switch (UnqualifiedType (*T)) {
case T_SCHAR:
case T_UCHAR:
- ConstExpr (&lval);
- if ((lval.Flags & E_MCTYPE) == E_TCONST) {
- /* Make it byte sized */
- lval.ConstVal &= 0xFF;
- }
- assignadjust (T, &lval);
- DefineData (&lval);
- return SIZEOF_CHAR;
-
case T_SHORT:
case T_USHORT:
case T_INT:
case T_UINT:
- case T_PTR:
- ConstExpr (&lval);
- if ((lval.Flags & E_MCTYPE) == E_TCONST) {
- /* Make it word sized */
- lval.ConstVal &= 0xFFFF;
- }
- assignadjust (T, &lval);
- DefineData (&lval);
- return SIZEOF_INT;
-
case T_LONG:
case T_ULONG:
- ConstExpr (&lval);
- if ((lval.Flags & E_MCTYPE) == E_TCONST) {
- /* Make it long sized */
- lval.ConstVal &= 0xFFFFFFFF;
- }
- assignadjust (T, &lval);
- DefineData (&lval);
- return SIZEOF_LONG;
+ return ParseScalarInit (T);
+
+ case T_PTR:
+ return ParsePointerInit (T);
case T_ARRAY:
- ElementCount = GetElementCount (T);
- ElementSize = CheckedSizeOf (T + DECODE_SIZE + 1);
- t = T + DECODE_SIZE + 1;
- if (IsTypeChar (t) && CurTok.Tok == TOK_SCONST) {
- str = GetLiteral (CurTok.IVal);
- Count = GetLiteralPoolOffs () - CurTok.IVal;
- TranslateLiteralPool (CurTok.IVal); /* Translate into target charset */
- g_defbytes (str, Count);
- ResetLiteralPoolOffs (CurTok.IVal); /* Remove string from pool */
- NextToken ();
- } else {
- ConsumeLCurly ();
- Count = 0;
- while (CurTok.Tok != TOK_RCURLY) {
- ParseInit (T + DECODE_SIZE + 1);
- ++Count;
- if (CurTok.Tok != TOK_COMMA)
- break;
- NextToken ();
- }
- ConsumeRCurly ();
- }
- if (ElementCount == UNSPECIFIED) {
- Encode (T + 1, Count);
- } else if (Count < ElementCount) {
- g_zerobytes ((ElementCount - Count) * ElementSize);
- } else if (Count > ElementCount) {
- Error ("Too many initializers");
- }
- return ElementCount * ElementSize;
+ return ParseArrayInit (T, AllowFlexibleMembers);
case T_STRUCT:
case T_UNION:
- return ParseStructInit (T);
+ return ParseStructInit (T, AllowFlexibleMembers);
case T_VOID:
if (!ANSI) {
+unsigned ParseInit (type* T)
+/* Parse initialization of variables. Return the number of data bytes. */
+{
+ /* 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