/* */
/* */
/* */
-/* (C) 1998-2001 Ullrich von Bassewitz */
-/* Wacholderweg 14 */
-/* D-70597 Stuttgart */
-/* EMail: uz@musoftware.de */
+/* (C) 1998-2008 Ullrich von Bassewitz */
+/* Roemerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
#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 "litpool.h"
#include "pragma.h"
#include "scanner.h"
+#include "standard.h"
#include "symtab.h"
-#include "declare.h"
+#include "typeconv.h"
-static void ParseTypeSpec (DeclSpec* D, int Default);
+static void ParseTypeSpec (DeclSpec* D, long Default, TypeCode Qualifiers);
/* Parse a type specificier */
+static unsigned ParseInitInternal (Type* T, int AllowFlexibleMembers);
+/* Parse initialization of variables. Return the number of data bytes. */
+
/*****************************************************************************/
-static type OptionalQualifiers (type Q)
+static TypeCode OptionalQualifiers (TypeCode Q)
/* Read type qualifiers if we have any */
{
- while (curtok == TOK_CONST || curtok == TOK_VOLATILE) {
+ while (TokIsTypeQual (&CurTok)) {
- switch (curtok) {
+ switch (CurTok.Tok) {
case TOK_CONST:
- if (Q & T_QUAL_CONST) {
+ if (Q & T_QUAL_CONST) {
Error ("Duplicate qualifier: `const'");
}
Q |= T_QUAL_CONST;
Q |= T_QUAL_VOLATILE;
break;
+ case TOK_RESTRICT:
+ if (Q & T_QUAL_RESTRICT) {
+ Error ("Duplicate qualifier: `restrict'");
+ }
+ Q |= T_QUAL_RESTRICT;
+ break;
+
default:
- /* Keep gcc silent */
- break;
+ Internal ("Unexpected type qualifier token: %d", CurTok.Tok);
}
-static void optionalint (void)
+static void OptionalInt (void)
/* Eat an optional "int" token */
{
- if (curtok == TOK_INT) {
+ if (CurTok.Tok == TOK_INT) {
/* Skip it */
NextToken ();
}
-static void optionalsigned (void)
+static void OptionalSigned (void)
/* Eat an optional "signed" token */
{
- if (curtok == TOK_SIGNED) {
+ if (CurTok.Tok == TOK_SIGNED) {
/* Skip it */
NextToken ();
}
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].C = 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].C = 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, TypeCode T)
+/* Add a type specifier to the type of a declaration */
+{
+ NeedTypeSpace (D, 1);
+ D->Type[D->Index++].C = T;
+}
+
+
+
+static void AddFuncTypeToDeclaration (Declaration* D, FuncDesc* F)
+/* Add a function type plus function descriptor to the type of a declaration */
+{
+ NeedTypeSpace (D, 1);
+ D->Type[D->Index].C = T_FUNC;
+ SetFuncDesc (D->Type + D->Index, F);
+ ++D->Index;
+}
+
+
+
+static void AddArrayToDeclaration (Declaration* D, long Size)
+/* Add an array type plus size to the type of a declaration */
+{
+ NeedTypeSpace (D, 1);
+ D->Type[D->Index].C = T_ARRAY;
+ D->Type[D->Index].A.L = Size;
+ ++D->Index;
+}
+
+
+
+static void FixArrayQualifiers (Type* T)
+/* Using typedefs, it is possible to generate declarations that have
+ * type qualifiers attached to an array, not the element type. Go and
+ * fix these here.
+ */
+{
+ TypeCode Q = T_QUAL_NONE;
+ while (T->C != T_END) {
+ if (IsTypeArray (T)) {
+ /* Extract any type qualifiers */
+ Q |= T->C & T_MASK_QUAL;
+ T->C = UnqualifiedType (T->C);
+ } else {
+ /* Add extracted type qualifiers here */
+ T->C |= Q;
+ Q = T_QUAL_NONE;
+ }
+ ++T;
+ }
+
+ /* Q must be empty now */
+ CHECK (Q == T_QUAL_NONE);
}
D->Flags &= ~DS_DEF_STORAGE;
/* Check the storage class given */
- switch (curtok) {
+ switch (CurTok.Tok) {
case TOK_EXTERN:
D->StorageClass = SC_EXTERN | SC_STATIC;
ident Ident;
/* Accept forward definitions */
- if (curtok != TOK_LCURLY) {
+ if (CurTok.Tok != TOK_LCURLY) {
return;
}
/* Read the enum tags */
EnumVal = 0;
- while (curtok != TOK_RCURLY) {
+ while (CurTok.Tok != TOK_RCURLY) {
/* We expect an identifier */
- if (curtok != TOK_IDENT) {
+ if (CurTok.Tok != TOK_IDENT) {
Error ("Identifier expected");
- continue;
+ continue;
}
/* Remember the identifier and skip it */
NextToken ();
/* Check for an assigned value */
- if (curtok == TOK_ASSIGN) {
- struct expent lval;
+ if (CurTok.Tok == TOK_ASSIGN) {
+ ExprDesc Expr;
NextToken ();
- constexpr (&lval);
- EnumVal = lval.e_const;
+ ConstAbsIntExpr (hie1, &Expr);
+ EnumVal = Expr.IVal;
}
/* Add an entry to the symbol table */
AddConstSym (Ident, type_int, SC_ENUM, EnumVal++);
- /* Check for end of definition */
- if (curtok != TOK_COMMA)
+ /* Check for end of definition */
+ if (CurTok.Tok != TOK_COMMA)
break;
NextToken ();
}
-static SymEntry* ParseStructDecl (const char* Name, type StructType)
+static SymEntry* ParseStructDecl (const char* Name, TypeCode StructType)
/* Parse a struct/union declaration. */
{
- unsigned Size;
- unsigned Offs;
+ unsigned StructSize;
+ unsigned FieldSize;
+ unsigned Offs;
+ int FlexibleMember;
SymTable* FieldTab;
SymEntry* Entry;
- if (curtok != TOK_LCURLY) {
+ if (CurTok.Tok != TOK_LCURLY) {
/* Just a forward declaration. Try to find a struct with the given
* name. If there is none, insert a forward declaration into the
* current lexical level.
EnterStructLevel ();
/* Parse struct fields */
- Size = 0;
- while (curtok != TOK_RCURLY) {
+ FlexibleMember = 0;
+ StructSize = 0;
+ while (CurTok.Tok != TOK_RCURLY) {
/* Get the type of the entry */
DeclSpec Spec;
InitDeclSpec (&Spec);
- ParseTypeSpec (&Spec, -1);
+ ParseTypeSpec (&Spec, -1, T_QUAL_NONE);
/* Read fields with this type */
while (1) {
- /* Get type and name of the struct field */
Declaration Decl;
+
+ /* If we had a flexible array member before, no other fields can
+ * follow.
+ */
+ if (FlexibleMember) {
+ Error ("Flexible array member must be last field");
+ FlexibleMember = 0; /* Avoid further errors */
+ }
+
+ /* Get type and name of the struct field */
ParseDecl (&Spec, &Decl, 0);
- /* Add a field entry to the table */
- AddLocalSym (Decl.Ident, Decl.Type, SC_SFLD, (StructType == T_STRUCT)? Size : 0);
+ /* Get the offset of this field */
+ Offs = (StructType == T_STRUCT)? StructSize : 0;
+
+ /* Calculate the sizes, handle flexible array members */
+ if (StructType == T_STRUCT) {
+
+ /* It's a struct. Check if this field is a flexible array
+ * member, and calculate the size of the field.
+ */
+ if (IsTypeArray (Decl.Type) && GetElementCount (Decl.Type) == UNSPECIFIED) {
+ /* Array with unspecified size */
+ if (StructSize == 0) {
+ Error ("Flexible array member cannot be first struct field");
+ }
+ FlexibleMember = 1;
+ /* Assume zero for size calculations */
+ SetElementCount (Decl.Type, FLEXIBLE);
+ } else {
+ StructSize += CheckedSizeOf (Decl.Type);
+ }
- /* Calculate offset of next field/size of the union */
- Offs = SizeOf (Decl.Type);
- if (StructType == T_STRUCT) {
- Size += Offs;
} else {
- if (Offs > Size) {
- Size = Offs;
+
+ /* It's a union */
+ FieldSize = CheckedSizeOf (Decl.Type);
+ if (FieldSize > StructSize) {
+ StructSize = FieldSize;
}
- }
+ }
- if (curtok != TOK_COMMA)
+ /* Add a field entry to the table */
+ AddLocalSym (Decl.Ident, Decl.Type, SC_STRUCTFIELD, Offs);
+
+ if (CurTok.Tok != TOK_COMMA) {
break;
+ }
NextToken ();
}
- ConsumeSemi ();
+ ConsumeSemi ();
}
/* Skip the closing brace */
LeaveStructLevel ();
/* Make a real entry from the forward decl and return it */
- return AddStructSym (Name, Size, FieldTab);
+ return AddStructSym (Name, StructSize, FieldTab);
}
-static void ParseTypeSpec (DeclSpec* D, int Default)
+static void ParseTypeSpec (DeclSpec* D, long Default, TypeCode Qualifiers)
/* Parse a type specificier */
{
ident Ident;
SymEntry* Entry;
- type StructType;
- type Qualifiers; /* Type qualifiers */
+ TypeCode StructType;
/* Assume we have an explicit type */
D->Flags &= ~DS_DEF_TYPE;
/* Read type qualifiers if we have any */
- Qualifiers = OptionalQualifiers (T_QUAL_NONE);
+ Qualifiers = OptionalQualifiers (Qualifiers);
/* Look at the data type */
- switch (curtok) {
+ switch (CurTok.Tok) {
case TOK_VOID:
NextToken ();
- D->Type[0] = T_VOID;
- D->Type[1] = T_END;
+ D->Type[0].C = T_VOID;
+ D->Type[1].C = T_END;
break;
case TOK_CHAR:
NextToken ();
- D->Type[0] = GetDefaultChar();
- D->Type[1] = T_END;
+ D->Type[0].C = GetDefaultChar();
+ D->Type[1].C = T_END;
break;
case TOK_LONG:
NextToken ();
- if (curtok == TOK_UNSIGNED) {
+ if (CurTok.Tok == TOK_UNSIGNED) {
NextToken ();
- optionalint ();
- D->Type[0] = T_ULONG;
- D->Type[1] = T_END;
+ OptionalInt ();
+ D->Type[0].C = T_ULONG;
+ D->Type[1].C = T_END;
} else {
- optionalsigned ();
- optionalint ();
- D->Type[0] = T_LONG;
- D->Type[1] = T_END;
+ OptionalSigned ();
+ OptionalInt ();
+ D->Type[0].C = T_LONG;
+ D->Type[1].C = T_END;
}
break;
case TOK_SHORT:
NextToken ();
- if (curtok == TOK_UNSIGNED) {
+ if (CurTok.Tok == TOK_UNSIGNED) {
NextToken ();
- optionalint ();
- D->Type[0] = T_USHORT;
- D->Type[1] = T_END;
+ OptionalInt ();
+ D->Type[0].C = T_USHORT;
+ D->Type[1].C = T_END;
} else {
- optionalsigned ();
- optionalint ();
- D->Type[0] = T_SHORT;
- D->Type[1] = T_END;
+ OptionalSigned ();
+ OptionalInt ();
+ D->Type[0].C = T_SHORT;
+ D->Type[1].C = T_END;
}
- break;
+ break;
case TOK_INT:
NextToken ();
- D->Type[0] = T_INT;
- D->Type[1] = T_END;
+ D->Type[0].C = T_INT;
+ D->Type[1].C = T_END;
break;
case TOK_SIGNED:
NextToken ();
- switch (curtok) {
+ switch (CurTok.Tok) {
case TOK_CHAR:
NextToken ();
- D->Type[0] = T_SCHAR;
- D->Type[1] = T_END;
+ D->Type[0].C = T_SCHAR;
+ D->Type[1].C = T_END;
break;
case TOK_SHORT:
NextToken ();
- optionalint ();
- D->Type[0] = T_SHORT;
- D->Type[1] = T_END;
+ OptionalInt ();
+ D->Type[0].C = T_SHORT;
+ D->Type[1].C = T_END;
break;
case TOK_LONG:
NextToken ();
- optionalint ();
- D->Type[0] = T_LONG;
- D->Type[1] = T_END;
- break;
+ OptionalInt ();
+ D->Type[0].C = T_LONG;
+ D->Type[1].C = T_END;
+ break;
case TOK_INT:
NextToken ();
/* FALL THROUGH */
- default:
- D->Type[0] = T_INT;
- D->Type[1] = T_END;
+ default:
+ D->Type[0].C = T_INT;
+ D->Type[1].C = T_END;
break;
}
break;
case TOK_UNSIGNED:
NextToken ();
- switch (curtok) {
+ switch (CurTok.Tok) {
case TOK_CHAR:
NextToken ();
- D->Type[0] = T_UCHAR;
- D->Type[1] = T_END;
+ D->Type[0].C = T_UCHAR;
+ D->Type[1].C = T_END;
break;
case TOK_SHORT:
NextToken ();
- optionalint ();
- D->Type[0] = T_USHORT;
- D->Type[1] = T_END;
+ OptionalInt ();
+ D->Type[0].C = T_USHORT;
+ D->Type[1].C = T_END;
break;
case TOK_LONG:
NextToken ();
- optionalint ();
- D->Type[0] = T_ULONG;
- D->Type[1] = T_END;
+ OptionalInt ();
+ D->Type[0].C = T_ULONG;
+ D->Type[1].C = T_END;
break;
- case TOK_INT:
+ case TOK_INT:
NextToken ();
/* FALL THROUGH */
default:
- D->Type[0] = T_UINT;
- D->Type[1] = T_END;
+ D->Type[0].C = T_UINT;
+ D->Type[1].C = T_END;
break;
}
break;
+ case TOK_FLOAT:
+ NextToken ();
+ D->Type[0].C = T_FLOAT;
+ D->Type[1].C = T_END;
+ break;
+
+ case TOK_DOUBLE:
+ NextToken ();
+ D->Type[0].C = T_DOUBLE;
+ D->Type[1].C = T_END;
+ break;
+
case TOK_STRUCT:
case TOK_UNION:
- StructType = (curtok == TOK_STRUCT)? T_STRUCT : T_UNION;
+ StructType = (CurTok.Tok == TOK_STRUCT)? T_STRUCT : T_UNION;
NextToken ();
/* */
- if (curtok == TOK_IDENT) {
+ if (CurTok.Tok == TOK_IDENT) {
strcpy (Ident, CurTok.Ident);
NextToken ();
} else {
/* Declare the struct in the current scope */
Entry = ParseStructDecl (Ident, StructType);
/* Encode the struct entry into the type */
- D->Type[0] = StructType;
- EncodePtr (D->Type+1, Entry);
- D->Type[DECODE_SIZE+1] = T_END;
+ D->Type[0].C = StructType;
+ SetSymEntry (D->Type, Entry);
+ D->Type[1].C = T_END;
break;
case TOK_ENUM:
NextToken ();
- if (curtok != TOK_LCURLY) {
+ if (CurTok.Tok != TOK_LCURLY) {
/* Named enum */
- if (curtok == TOK_IDENT) {
+ if (CurTok.Tok == TOK_IDENT) {
/* Find an entry with this name */
- Entry = FindTagSym (CurTok.Ident);
+ Entry = FindTagSym (CurTok.Ident);
if (Entry) {
if (SymIsLocal (Entry) && (Entry->Flags & SC_ENUM) == 0) {
Error ("Symbol `%s' is already different kind", Entry->Name);
}
- } else {
+ } else {
/* Insert entry into table ### */
}
/* Skip the identifier */
NextToken ();
- } else {
+ } else {
Error ("Identifier expected");
- }
- }
- /* Remember we have an extra type decl */
- D->Flags |= DS_EXTRA_TYPE;
- /* Parse the enum decl */
+ }
+ }
+ /* Remember we have an extra type decl */
+ D->Flags |= DS_EXTRA_TYPE;
+ /* Parse the enum decl */
ParseEnumDecl ();
- D->Type[0] = T_INT;
- D->Type[1] = T_END;
+ D->Type[0].C = T_INT;
+ D->Type[1].C = T_END;
break;
case TOK_IDENT:
- Entry = FindSym (CurTok.Ident);
- if (Entry && IsTypeDef (Entry)) {
+ Entry = FindSym (CurTok.Ident);
+ if (Entry && SymIsTypeDef (Entry)) {
/* It's a typedef */
NextToken ();
- TypeCpy (D->Type, Entry->Type);
+ TypeCpy (D->Type, Entry->Type);
break;
}
/* FALL THROUGH */
default:
if (Default < 0) {
Error ("Type expected");
- D->Type[0] = T_INT;
- D->Type[1] = T_END;
+ D->Type[0].C = T_INT;
+ D->Type[1].C = T_END;
} else {
- D->Flags |= DS_DEF_TYPE;
- D->Type[0] = (type) Default;
- D->Type[1] = T_END;
- }
- break;
+ D->Flags |= DS_DEF_TYPE;
+ D->Type[0].C = (TypeCode) Default;
+ D->Type[1].C = T_END;
+ }
+ break;
}
/* There may also be qualifiers *after* the initial type */
- D->Type[0] |= OptionalQualifiers (Qualifiers);
+ D->Type[0].C |= OptionalQualifiers (Qualifiers);
}
-static type* ParamTypeCvt (type* T)
+static Type* ParamTypeCvt (Type* T)
/* If T is an array, convert it to a pointer else do nothing. Return the
* resulting type.
*/
{
if (IsTypeArray (T)) {
- T += DECODE_SIZE;
- T[0] = T_PTR;
+ T->C = T_PTR;
}
return T;
}
/* Parse an old style (K&R) parameter list */
{
/* Parse params */
- while (curtok != TOK_RPAREN) {
+ while (CurTok.Tok != TOK_RPAREN) {
/* List of identifiers expected */
- if (curtok != TOK_IDENT) {
+ if (CurTok.Tok != TOK_IDENT) {
Error ("Identifier expected");
}
/* Create a symbol table entry with type int */
- AddLocalSym (CurTok.Ident, type_int, SC_AUTO | SC_PARAM | SC_DEF, 0);
+ AddLocalSym (CurTok.Ident, type_int, SC_AUTO | SC_PARAM | SC_DEF | SC_DEFTYPE, 0);
/* Count arguments */
++F->ParamCount;
NextToken ();
/* Check for more parameters */
- if (curtok == TOK_COMMA) {
+ if (CurTok.Tok == TOK_COMMA) {
NextToken ();
} else {
break;
ConsumeRParen ();
/* An optional list of type specifications follows */
- while (curtok != TOK_LCURLY) {
+ while (CurTok.Tok != TOK_LCURLY) {
DeclSpec Spec;
* we ignore all this, since we use auto anyway.
*/
if ((Spec.StorageClass & SC_AUTO) == 0 &&
- (Spec.StorageClass & SC_REGISTER) == 0) {
+ (Spec.StorageClass & SC_REGISTER) == 0) {
Error ("Illegal storage class");
}
/* Parse a comma separated variable list */
while (1) {
- Declaration Decl;
+ Declaration Decl;
/* Read the parameter */
ParseDecl (&Spec, &Decl, DM_NEED_IDENT);
if (Decl.Ident[0] != '\0') {
- /* We have a name given. Search for the symbol */
+ /* We have a name given. Search for the symbol */
SymEntry* Sym = FindLocalSym (Decl.Ident);
if (Sym) {
- /* Found it, change the default type to the one given */
- ChangeSymType (Sym, ParamTypeCvt (Decl.Type));
+ /* Check if we already changed the type for this
+ * parameter
+ */
+ if (Sym->Flags & SC_DEFTYPE) {
+ /* Found it, change the default type to the one given */
+ ChangeSymType (Sym, ParamTypeCvt (Decl.Type));
+ /* Reset the "default type" flag */
+ Sym->Flags &= ~SC_DEFTYPE;
+ } else {
+ /* Type has already been changed */
+ Error ("Redefinition for parameter `%s'", Sym->Name);
+ }
} else {
Error ("Unknown identifier: `%s'", Decl.Ident);
}
}
- if (curtok == TOK_COMMA) {
- NextToken ();
+ if (CurTok.Tok == TOK_COMMA) {
+ NextToken ();
} else {
break;
}
/* Parse a new style (ANSI) parameter list */
{
/* Parse params */
- while (curtok != TOK_RPAREN) {
+ while (CurTok.Tok != TOK_RPAREN) {
DeclSpec Spec;
Declaration Decl;
DeclAttr Attr;
/* Allow an ellipsis as last parameter */
- if (curtok == TOK_ELLIPSIS) {
- NextToken ();
+ if (CurTok.Tok == TOK_ELLIPSIS) {
+ NextToken ();
F->Flags |= FD_VARIADIC;
break;
}
/* Read the declaration specifier */
ParseDeclSpec (&Spec, SC_AUTO, T_INT);
- /* We accept only auto and register as storage class specifiers, but
- * we ignore all this and use auto.
- */
- if ((Spec.StorageClass & SC_AUTO) == 0 &&
- (Spec.StorageClass & SC_REGISTER) == 0) {
+ /* We accept only auto and register as storage class specifiers */
+ if ((Spec.StorageClass & SC_AUTO) == SC_AUTO) {
+ Spec.StorageClass = SC_AUTO | SC_PARAM | SC_DEF;
+ } else if ((Spec.StorageClass & SC_REGISTER) == SC_REGISTER) {
+ Spec.StorageClass = SC_REGISTER | SC_STATIC | SC_PARAM | SC_DEF;
+ } else {
Error ("Illegal storage class");
+ Spec.StorageClass = SC_AUTO | SC_PARAM | SC_DEF;
}
- Spec.StorageClass = SC_AUTO | SC_PARAM | SC_DEF;
/* Allow parameters without a name, but remember if we had some to
* eventually print an error message later.
++F->ParamCount;
/* Check for more parameters */
- if (curtok == TOK_COMMA) {
+ if (CurTok.Tok == TOK_COMMA) {
NextToken ();
} else {
break;
ConsumeRParen ();
/* Check if this is a function definition */
- if (curtok == TOK_LCURLY) {
- /* Print an error if in strict ANSI mode and we have unnamed
- * parameters.
+ if (CurTok.Tok == TOK_LCURLY) {
+ /* Print an error if we have unnamed parameters and cc65 extensions
+ * are disabled.
*/
- if (ANSI && (F->Flags & FD_UNNAMED_PARAMS) != 0) {
+ if (IS_Get (&Standard) != STD_CC65 &&
+ (F->Flags & FD_UNNAMED_PARAMS) != 0) {
Error ("Parameter name omitted");
}
}
EnterFunctionLevel ();
/* Check for several special parameter lists */
- if (curtok == TOK_RPAREN) {
+ if (CurTok.Tok == TOK_RPAREN) {
/* Parameter list is empty */
F->Flags |= (FD_EMPTY | FD_VARIADIC);
- } else if (curtok == TOK_VOID && nxttok == TOK_RPAREN) {
+ } else if (CurTok.Tok == TOK_VOID && NextTok.Tok == TOK_RPAREN) {
/* Parameter list declared as void */
NextToken ();
F->Flags |= FD_VOID_PARAM;
- } else if (curtok == TOK_IDENT && (nxttok == TOK_COMMA || nxttok == TOK_RPAREN)) {
- /* If the identifier is a typedef, we have a new style parameter list,
- * if it's some other identifier, it's an old style parameter list.
- */
- Sym = FindSym (CurTok.Ident);
- if (Sym == 0 || !IsTypeDef (Sym)) {
- /* Old style (K&R) function. Assume variable param list. */
- F->Flags |= (FD_OLDSTYLE | FD_VARIADIC);
- }
+ } else if (CurTok.Tok == TOK_IDENT &&
+ (NextTok.Tok == TOK_COMMA || NextTok.Tok == TOK_RPAREN)) {
+ /* If the identifier is a typedef, we have a new style parameter list,
+ * if it's some other identifier, it's an old style parameter list.
+ */
+ Sym = FindSym (CurTok.Ident);
+ if (Sym == 0 || !SymIsTypeDef (Sym)) {
+ /* Old style (K&R) function. */
+ F->Flags |= FD_OLDSTYLE;
+ }
}
/* Parse params */
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 = SizeOf (Sym->Type);
- Sym->V.Offs = Offs;
+ unsigned Size = CheckedSizeOf (Sym->Type);
+ if (SymIsRegVar (Sym)) {
+ Sym->V.R.SaveOffs = Offs;
+ } else {
+ Sym->V.Offs = Offs;
+ }
Offs += Size;
F->ParamSize += Size;
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 void Decl (Declaration* D, unsigned Mode)
+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) {
+
+ TypeCode C;
- if (curtok == TOK_STAR) {
- type T = T_PTR;
+ /* Skip the star */
NextToken ();
- /* Allow optional const or volatile qualifiers */
- T |= OptionalQualifiers (T_QUAL_NONE);
- Decl (D, Mode);
- *D->T++ = T;
+
+ /* Allow optional const or volatile qualifiers */
+ C = T_PTR | OptionalQualifiers (T_QUAL_NONE);
+
+ /* Parse the type, the pointer points to */
+ Decl (Spec, D, Mode);
+
+ /* Add the type */
+ AddTypeToDeclaration (D, C);
return;
- } else if (curtok == TOK_LPAREN) {
+ }
+
+ /* Function modifiers */
+ if (CurTok.Tok == TOK_FASTCALL || CurTok.Tok == TOK_NEAR || CurTok.Tok == TOK_FAR) {
+
+ /* Remember the current type pointer */
+ Type* T = D->Type + D->Index;
+
+ /* Read the flags */
+ unsigned Flags = FunctionModifierFlags ();
+
+ /* Parse the function */
+ Decl (Spec, D, Mode);
+
+ /* Check that we have a function */
+ if (!IsTypeFunc (T) && !IsTypeFuncPtr (T)) {
+ Error ("Function modifier applied to non function");
+ } else {
+ ApplyFunctionModifiers (T, Flags);
+ }
+
+ /* Done */
+ return;
+ }
+
+ if (CurTok.Tok == TOK_LPAREN) {
NextToken ();
- Decl (D, Mode);
+ Decl (Spec, D, Mode);
ConsumeRParen ();
- } else if (curtok == TOK_FASTCALL) {
- /* Remember the current type pointer */
- type* T = D->T;
- /* Skip the fastcall token */
- NextToken ();
- /* Parse the function */
- Decl (D, Mode);
- /* Set the fastcall flag */
- if (!IsTypeFunc (T)) {
- Error ("__fastcall__ modifier applied to non function");
- } else if (IsVariadicFunc (T)) {
- Error ("Cannot apply __fastcall__ to functions with variable parameter list");
- } else {
- FuncDesc* F = (FuncDesc*) DecodePtr (T+1);
- F->Flags |= FD_FASTCALL;
- }
- return;
} else {
/* Things depend on Mode now:
* - Mode == DM_NEED_IDENT means:
* we *must* have a type and a variable identifer.
* - Mode == DM_NO_IDENT means:
- * we must have a type but no variable identifer
+ * we must have a type but no variable identifer
* (if there is one, it's not read).
* - Mode == DM_ACCEPT_IDENT means:
- * we *may* have an identifier. If there is an identifier,
- * it is read, but it is no error, if there is none.
+ * we *may* have an identifier. If there is an identifier,
+ * it is read, but it is no error, if there is none.
*/
if (Mode == DM_NO_IDENT) {
D->Ident[0] = '\0';
- } else if (curtok == TOK_IDENT) {
+ } else if (CurTok.Tok == TOK_IDENT) {
strcpy (D->Ident, CurTok.Ident);
NextToken ();
} else {
Error ("Identifier expected");
}
D->Ident[0] = '\0';
- return;
}
}
- while (curtok == TOK_LBRACK || curtok == TOK_LPAREN) {
- if (curtok == TOK_LPAREN) {
+ while (CurTok.Tok == TOK_LBRACK || CurTok.Tok == TOK_LPAREN) {
+ if (CurTok.Tok == TOK_LPAREN) {
+
/* Function declaration */
- FuncDesc* F;
+ FuncDesc* F;
NextToken ();
- /* Parse the function declaration */
+
+ /* Parse the function declaration */
F = ParseFuncDecl ();
- *D->T++ = T_FUNC;
- EncodePtr (D->T, F);
- D->T += DECODE_SIZE;
+
+ /* Add the function type. Be sure to bounds check the type buffer */
+ AddFuncTypeToDeclaration (D, F);
} else {
- /* Array declaration */
- unsigned long Size = 0;
+ /* Array declaration */
+ long Size = UNSPECIFIED;
NextToken ();
- /* Read the size if it is given */
- if (curtok != TOK_RBRACK) {
- struct expent lval;
- constexpr (&lval);
- Size = lval.e_const;
+ /* Read the size if it is given */
+ if (CurTok.Tok != TOK_RBRACK) {
+ ExprDesc Expr;
+ ConstAbsIntExpr (hie1, &Expr);
+ if (Expr.IVal <= 0) {
+ if (D->Ident[0] != '\0') {
+ Error ("Size of array `%s' is invalid", D->Ident);
+ } else {
+ Error ("Size of array is invalid");
+ }
+ Expr.IVal = 1;
+ }
+ Size = Expr.IVal;
}
ConsumeRBrack ();
- *D->T++ = T_ARRAY;
- Encode (D->T, Size);
- D->T += DECODE_SIZE;
+
+ /* Add the array type with the size */
+ AddArrayToDeclaration (D, Size);
}
}
}
-type* ParseType (type* Type)
+Type* ParseType (Type* T)
/* Parse a complete type specification */
{
DeclSpec Spec;
/* Get a type without a default */
InitDeclSpec (&Spec);
- ParseTypeSpec (&Spec, -1);
+ ParseTypeSpec (&Spec, -1, T_QUAL_NONE);
/* Parse additional declarators */
- InitDeclaration (&Decl);
ParseDecl (&Spec, &Decl, DM_NO_IDENT);
/* Copy the type to the target buffer */
- TypeCpy (Type, Decl.Type);
+ TypeCpy (T, Decl.Type);
/* Return a pointer to the target buffer */
- return Type;
+ return T;
}
InitDeclaration (D);
/* Get additional declarators and the identifier */
- Decl (D, Mode);
+ 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);
+
+ /* Fix any type qualifiers attached to an array type */
+ FixArrayQualifiers (D->Type);
+
+ /* Check several things for function or function pointer types */
+ if (IsTypeFunc (D->Type) || IsTypeFuncPtr (D->Type)) {
+
+ /* A function. Check the return type */
+ Type* RetType = GetFuncReturn (D->Type);
+
+ /* Functions may not return functions or arrays */
+ if (IsTypeFunc (RetType)) {
+ Error ("Functions are not allowed to return functions");
+ } else if (IsTypeArray (RetType)) {
+ Error ("Functions are not allowed to return arrays");
+ }
+
+ /* The return type must not be qualified */
+ if (GetQualifier (RetType) != T_QUAL_NONE && RetType[1].C == T_END) {
+
+ if (GetType (RetType) == T_TYPE_VOID) {
+ /* A qualified void type is always an error */
+ Error ("function definition has qualified void return type");
+ } else {
+ /* For others, qualifiers are ignored */
+ Warning ("type qualifiers ignored on function return type");
+ RetType[0].C = UnqualifiedType (RetType[0].C);
+ }
+ }
+
+ /* Warn about an implicit int return in the function */
+ if ((Spec->Flags & DS_DEF_TYPE) != 0 &&
+ RetType[0].C == T_INT && RetType[1].C == T_END) {
+ /* Function has an implicit int return. Output a warning if we don't
+ * have the C89 standard enabled explicitly.
+ */
+ if (IS_Get (&Standard) >= STD_C99) {
+ Warning ("Implicit `int' return type is an obsolete feature");
+ }
+ GetFuncDesc (D->Type)->Flags |= FD_OLDSTYLE_INTRET;
+ }
+
+ }
/* Check the size of the generated type */
- if (!IsTypeFunc (D->Type) && !IsTypeVoid (D->Type) && SizeOf (D->Type) >= 0x10000) {
- if (D->Ident[0] != '\0') {
- Error ("Size of `%s' is invalid", D->Ident);
- } else {
- Error ("Invalid size");
- }
+ if (!IsTypeFunc (D->Type) && !IsTypeVoid (D->Type)) {
+ unsigned Size = SizeOf (D->Type);
+ if (Size >= 0x10000) {
+ if (D->Ident[0] != '\0') {
+ Error ("Size of `%s' is invalid (0x%06X)", D->Ident, Size);
+ } else {
+ Error ("Invalid size in declaration (0x%06X)", Size);
+ }
+ }
}
+
}
-void ParseDeclSpec (DeclSpec* D, unsigned DefStorage, int DefType)
+void ParseDeclSpec (DeclSpec* D, unsigned DefStorage, long DefType)
/* Parse a declaration specification */
{
+ TypeCode Qualifiers;
+
/* Initialize the DeclSpec struct */
InitDeclSpec (D);
- /* First, get the storage class specifier for this declaration */
+ /* There may be qualifiers *before* the storage class specifier */
+ Qualifiers = OptionalQualifiers (T_QUAL_NONE);
+
+ /* Now get the storage class specifier for this declaration */
ParseStorageClass (D, DefStorage);
- /* Parse the type specifiers */
- ParseTypeSpec (D, DefType);
+ /* Parse the type specifiers passing any initial type qualifiers */
+ ParseTypeSpec (D, DefType, Qualifiers);
}
-static void ParseVoidInit (void)
-/* Parse an initialization of a void variable (special cc65 extension) */
+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.
+ */
{
- struct expent lval;
+ 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 ();
+ }
+}
- /* Allow an arbitrary list of values */
- ConsumeLCurly ();
- do {
- constexpr (&lval);
- switch (lval.e_tptr[0]) {
- case T_SCHAR:
- case T_UCHAR:
- if ((lval.e_flags & E_MCTYPE) == E_TCONST) {
- /* Make it byte sized */
- lval.e_const &= 0xFF;
- }
- DefineData (&lval);
- break;
- case T_SHORT:
- case T_USHORT:
- case T_INT:
- case T_UINT:
- case T_PTR:
- case T_ARRAY:
- if ((lval.e_flags & E_MCTYPE) == E_TCONST) {
- /* Make it word sized */
- lval.e_const &= 0xFFFF;
- }
- DefineData (&lval);
- 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_LONG:
- case T_ULONG:
- DefineData (&lval);
- 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_COMMA) {
- break;
- }
- NextToken ();
- } while (curtok != TOK_RCURLY);
- ConsumeRCurly ();
+static void DefineData (ExprDesc* Expr)
+/* Output a data definition for the given expression */
+{
+ switch (ED_GetLoc (Expr)) {
+
+ case E_LOC_ABS:
+ /* Absolute: numeric address or const */
+ g_defdata (TypeOf (Expr->Type) | CF_CONST, Expr->IVal, 0);
+ break;
+
+ case E_LOC_GLOBAL:
+ /* Global variable */
+ g_defdata (CF_EXTERNAL, Expr->Name, Expr->IVal);
+ break;
+
+ case E_LOC_STATIC:
+ case E_LOC_LITERAL:
+ /* Static variable or literal in the literal pool */
+ g_defdata (CF_STATIC, Expr->Name, Expr->IVal);
+ break;
+
+ case E_LOC_REGISTER:
+ /* Register variable. Taking the address is usually not
+ * allowed.
+ */
+ if (IS_Get (&AllowRegVarAddr) == 0) {
+ Error ("Cannot take the address of a register variable");
+ }
+ g_defdata (CF_REGVAR, Expr->Name, Expr->IVal);
+ break;
+
+ case E_LOC_STACK:
+ case E_LOC_PRIMARY:
+ case E_LOC_EXPR:
+ Error ("Non constant initializer");
+ break;
+
+ default:
+ Internal ("Unknown constant type: 0x%04X", ED_GetLoc (Expr));
+ }
}
-static void ParseStructInit (type* Type)
-/* Parse initialization of a struct or union */
+static unsigned ParseScalarInit (Type* T)
+/* Parse initializaton for scalar data types. Return the number of data bytes. */
+{
+ ExprDesc ED;
+
+ /* Optional opening brace */
+ unsigned BraceCount = OpeningCurlyBraces (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 (hie1, &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 (hie1, &ED);
+ TypeConversion (&ED, 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 ||
+ (CurTok.Tok == TOK_LCURLY && NextTok.Tok == TOK_SCONST))) {
+
+ /* Char array initialized by string constant */
+ int NeedParen;
+ const char* Str;
+
+ /* If we initializer is enclosed in brackets, remember this fact and
+ * skip the opening bracket.
+ */
+ NeedParen = (CurTok.Tok == TOK_LCURLY);
+ if (NeedParen) {
+ NextToken ();
+ }
+
+ /* Get the initializer string and its size */
+ 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 ();
+
+ /* If the initializer was enclosed in curly braces, we need a closing
+ * one.
+ */
+ if (NeedParen) {
+ ConsumeRCurly ();
+ }
+
+ } 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 */
+ SetElementCount (T, 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* T, int AllowFlexibleMembers)
+/* Parse initialization of a struct or union. Return the number of data bytes. */
{
SymEntry* Entry;
SymTable* Tab;
+ unsigned StructSize;
+ unsigned Size;
+
/* Consume the opening curly brace */
ConsumeLCurly ();
/* Get a pointer to the struct entry from the type */
- Entry = (SymEntry*) Decode (Type + 1);
+ Entry = GetSymEntry (T);
+
+ /* Get the size of the struct from the symbol table entry */
+ StructSize = Entry->V.S.Size;
/* Check if this struct definition has a field table. If it doesn't, it
* is an incomplete definition.
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 */
- return;
+ /* Try error recovery */
+ SkipInitializer (1);
+ /* Nothing initialized */
+ return 0;
}
/* Get a pointer to the list of symbols */
Entry = Tab->SymHead;
- while (curtok != TOK_RCURLY) {
- if (Entry == 0) {
- Error ("Too many initializers");
- return;
- }
- ParseInit (Entry->Type);
- Entry = Entry->NextSym;
- if (curtok != TOK_COMMA)
- break;
- NextToken ();
+
+ /* Initialize fields */
+ Size = 0;
+ while (CurTok.Tok != TOK_RCURLY) {
+ if (Entry == 0) {
+ Error ("Too many initializers");
+ SkipInitializer (1);
+ return Size;
+ }
+ /* 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;
+ NextToken ();
}
/* Consume the closing curly brace */
ConsumeRCurly ();
/* If there are struct fields left, reserve additional storage */
- while (Entry) {
- g_zerobytes (SizeOf (Entry->Type));
- Entry = Entry->NextSym;
+ 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;
}
-void ParseInit (type* T)
-/* Parse initialization of variables. */
+static unsigned ParseVoidInit (void)
+/* Parse an initialization of a void variable (special cc65 extension).
+ * Return the number of bytes initialized.
+ */
{
- struct expent lval;
- type* t;
- const char* str;
- int Count;
- int Size;
+ ExprDesc Expr;
+ unsigned Size;
+
+ /* Opening brace */
+ ConsumeLCurly ();
+
+ /* Allow an arbitrary list of values */
+ Size = 0;
+ do {
+ ConstExpr (hie1, &Expr);
+ switch (UnqualifiedType (Expr.Type[0].C)) {
+
+ case T_SCHAR:
+ case T_UCHAR:
+ if (ED_IsConstAbsInt (&Expr)) {
+ /* Make it byte sized */
+ Expr.IVal &= 0xFF;
+ }
+ DefineData (&Expr);
+ Size += SIZEOF_CHAR;
+ break;
+
+ case T_SHORT:
+ case T_USHORT:
+ case T_INT:
+ case T_UINT:
+ case T_PTR:
+ case T_ARRAY:
+ if (ED_IsConstAbsInt (&Expr)) {
+ /* Make it word sized */
+ Expr.IVal &= 0xFFFF;
+ }
+ DefineData (&Expr);
+ Size += SIZEOF_INT;
+ break;
+
+ case T_LONG:
+ case T_ULONG:
+ if (ED_IsConstAbsInt (&Expr)) {
+ /* Make it dword sized */
+ Expr.IVal &= 0xFFFFFFFF;
+ }
+ DefineData (&Expr);
+ 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 Size;
+}
+
- switch (UnqualifiedType (*T)) {
+
+static unsigned ParseInitInternal (Type* T, int AllowFlexibleMembers)
+/* Parse initialization of variables. Return the number of data bytes. */
+{
+ switch (UnqualifiedType (T->C)) {
case T_SCHAR:
case T_UCHAR:
- constexpr (&lval);
- if ((lval.e_flags & E_MCTYPE) == E_TCONST) {
- /* Make it byte sized */
- lval.e_const &= 0xFF;
- }
- assignadjust (T, &lval);
- DefineData (&lval);
- break;
-
case T_SHORT:
case T_USHORT:
case T_INT:
case T_UINT:
- case T_PTR:
- constexpr (&lval);
- if ((lval.e_flags & E_MCTYPE) == E_TCONST) {
- /* Make it word sized */
- lval.e_const &= 0xFFFF;
- }
- assignadjust (T, &lval);
- DefineData (&lval);
- break;
-
case T_LONG:
case T_ULONG:
- constexpr (&lval);
- if ((lval.e_flags & E_MCTYPE) == E_TCONST) {
- /* Make it long sized */
- lval.e_const &= 0xFFFFFFFF;
- }
- assignadjust (T, &lval);
- DefineData (&lval);
- break;
+ return ParseScalarInit (T);
+
+ case T_PTR:
+ return ParsePointerInit (T);
case T_ARRAY:
- Size = Decode (T + 1);
- t = T + DECODE_SIZE + 1;
- if (IsTypeChar(t) && curtok == TOK_SCONST) {
- str = GetLiteral (curval);
- Count = strlen (str) + 1;
- TranslateLiteralPool (curval); /* Translate into target charset */
- g_defbytes (str, Count);
- ResetLiteralPoolOffs (curval); /* Remove string from pool */
- NextToken ();
- } else {
- ConsumeLCurly ();
- Count = 0;
- while (curtok != TOK_RCURLY) {
- ParseInit (T + DECODE_SIZE + 1);
- ++Count;
- if (curtok != TOK_COMMA)
- break;
- NextToken ();
- }
- ConsumeRCurly ();
- }
- if (Size == 0) {
- Encode (T + 1, Count);
- } else if (Count < Size) {
- g_zerobytes ((Size - Count) * SizeOf (T + DECODE_SIZE + 1));
- } else if (Count > Size) {
- Error ("Too many initializers");
- }
- break;
+ return ParseArrayInit (T, AllowFlexibleMembers);
case T_STRUCT:
case T_UNION:
- ParseStructInit (T);
- break;
+ return ParseStructInit (T, AllowFlexibleMembers);
case T_VOID:
- if (!ANSI) {
+ if (IS_Get (&Standard) == STD_CC65) {
/* Special cc65 extension in non ANSI mode */
- ParseVoidInit ();
- break;
+ return ParseVoidInit ();
}
/* FALLTHROUGH */
default:
Error ("Illegal type");
- break;
+ return SIZEOF_CHAR;
}
}
+unsigned ParseInit (Type* T)
+/* Parse initialization of variables. Return the number of data bytes. */
+{
+ /* Parse the initialization. Flexible array members can only be initialized
+ * in cc65 mode.
+ */
+ unsigned Size = ParseInitInternal (T, IS_Get (&Standard) == STD_CC65);
+
+ /* 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