/*****************************************************************************/
/* */
-/* declare.c */
+/* declare.c */
/* */
-/* Parse variable and function declarations */
+/* Parse variable and function declarations */
/* */
/* */
/* */
-/* (C) 1998-2002 Ullrich von Bassewitz */
-/* Wacholderweg 14 */
-/* D-70597 Stuttgart */
-/* EMail: uz@musoftware.de */
+/* (C) 1998-2015, 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"
+
+
+
+/*****************************************************************************/
+/* Data */
+/*****************************************************************************/
+
+
+
+typedef struct StructInitData StructInitData;
+struct StructInitData {
+ unsigned Size; /* Size of struct */
+ unsigned Offs; /* Current offset in struct */
+ unsigned BitVal; /* Summed up bit-field value */
+ unsigned ValBits; /* Valid bits in Val */
+};
/*****************************************************************************/
-/* Forwards */
+/* Forwards */
/*****************************************************************************/
-static void ParseTypeSpec (DeclSpec* D, int Default);
-/* Parse a type specificier */
+static void ParseTypeSpec (DeclSpec* D, long Default, TypeCode Qualifiers);
+/* Parse a type specifier */
+
+static unsigned ParseInitInternal (Type* T, int AllowFlexibleMembers);
+/* Parse initialization of variables. Return the number of data bytes. */
/*****************************************************************************/
-/* internal functions */
+/* Internal functions */
/*****************************************************************************/
-static type OptionalQualifiers (type Q)
-/* Read type qualifiers if we have any */
+static void DuplicateQualifier (const char* Name)
+/* Print an error message */
+{
+ Warning ("Duplicate qualifier: `%s'", Name);
+}
+
+
+
+static TypeCode OptionalQualifiers (TypeCode Allowed)
+/* Read type qualifiers if we have any. Allowed specifies the allowed
+** qualifiers.
+*/
{
- while (CurTok.Tok == TOK_CONST || CurTok.Tok == TOK_VOLATILE) {
+ /* We start without any qualifiers */
+ TypeCode Q = T_QUAL_NONE;
+
+ /* Check for more qualifiers */
+ while (1) {
+
+ switch (CurTok.Tok) {
+
+ case TOK_CONST:
+ if (Allowed & T_QUAL_CONST) {
+ if (Q & T_QUAL_CONST) {
+ DuplicateQualifier ("const");
+ }
+ Q |= T_QUAL_CONST;
+ } else {
+ goto Done;
+ }
+ break;
+
+ case TOK_VOLATILE:
+ if (Allowed & T_QUAL_VOLATILE) {
+ if (Q & T_QUAL_VOLATILE) {
+ DuplicateQualifier ("volatile");
+ }
+ Q |= T_QUAL_VOLATILE;
+ } else {
+ goto Done;
+ }
+ break;
+
+ case TOK_RESTRICT:
+ if (Allowed & T_QUAL_RESTRICT) {
+ if (Q & T_QUAL_RESTRICT) {
+ DuplicateQualifier ("restrict");
+ }
+ Q |= T_QUAL_RESTRICT;
+ } else {
+ goto Done;
+ }
+ break;
+
+ case TOK_NEAR:
+ if (Allowed & T_QUAL_NEAR) {
+ if (Q & T_QUAL_NEAR) {
+ DuplicateQualifier ("near");
+ }
+ Q |= T_QUAL_NEAR;
+ } else {
+ goto Done;
+ }
+ break;
+
+ case TOK_FAR:
+ if (Allowed & T_QUAL_FAR) {
+ if (Q & T_QUAL_FAR) {
+ DuplicateQualifier ("far");
+ }
+ Q |= T_QUAL_FAR;
+ } else {
+ goto Done;
+ }
+ break;
+
+ case TOK_FASTCALL:
+ if (Allowed & T_QUAL_FASTCALL) {
+ if (Q & T_QUAL_FASTCALL) {
+ DuplicateQualifier ("fastcall");
+ }
+ Q |= T_QUAL_FASTCALL;
+ } else {
+ goto Done;
+ }
+ break;
+
+ case TOK_CDECL:
+ if (Allowed & T_QUAL_CDECL) {
+ if (Q & T_QUAL_CDECL) {
+ DuplicateQualifier ("cdecl");
+ }
+ Q |= T_QUAL_CDECL;
+ } else {
+ goto Done;
+ }
+ break;
+
+ default:
+ goto Done;
+
+ }
+
+ /* Skip the token */
+ NextToken ();
+ }
- switch (CurTok.Tok) {
+Done:
+ /* We cannot have more than one address size far qualifier */
+ switch (Q & T_QUAL_ADDRSIZE) {
- case TOK_CONST:
- if (Q & T_QUAL_CONST) {
- Error ("Duplicate qualifier: `const'");
- }
- Q |= T_QUAL_CONST;
- break;
+ case T_QUAL_NONE:
+ case T_QUAL_NEAR:
+ case T_QUAL_FAR:
+ break;
- case TOK_VOLATILE:
- if (Q & T_QUAL_VOLATILE) {
- Error ("Duplicate qualifier: `volatile'");
- }
- Q |= T_QUAL_VOLATILE;
- break;
+ default:
+ Error ("Cannot specify more than one address size qualifier");
+ Q &= ~T_QUAL_ADDRSIZE;
+ }
- default:
- /* Keep gcc silent */
- break;
+ /* We cannot have more than one calling convention specifier */
+ switch (Q & T_QUAL_CCONV) {
- }
+ case T_QUAL_NONE:
+ case T_QUAL_FASTCALL:
+ case T_QUAL_CDECL:
+ break;
- /* Skip the token */
- NextToken ();
+ default:
+ Error ("Cannot specify more than one calling convention qualifier");
+ Q &= ~T_QUAL_CCONV;
}
/* Return the qualifiers read */
-static void optionalint (void)
+static void OptionalInt (void)
/* Eat an optional "int" token */
{
if (CurTok.Tok == TOK_INT) {
- /* Skip it */
- NextToken ();
+ /* Skip it */
+ NextToken ();
}
}
-static void optionalsigned (void)
+static void OptionalSigned (void)
/* Eat an optional "signed" token */
{
if (CurTok.Tok == TOK_SIGNED) {
- /* Skip it */
- NextToken ();
+ /* 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;
+ D->Attributes = 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 FixQualifiers (Type* DataType)
+/* Apply several fixes to qualifiers */
+{
+ Type* T;
+ TypeCode Q;
+
+ /* 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.
+ */
+ T = DataType;
+ Q = T_QUAL_NONE;
+ while (T->C != T_END) {
+ if (IsTypeArray (T)) {
+ /* Extract any type qualifiers */
+ Q |= GetQualifier (T);
+ 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);
+
+ /* Do some fixes on pointers and functions. */
+ T = DataType;
+ while (T->C != T_END) {
+ if (IsTypePtr (T)) {
+ /* Calling convention qualifier on the pointer? */
+ if (IsQualCConv (T)) {
+ /* Pull the convention off of the pointer */
+ Q = T[0].C & T_QUAL_CCONV;
+ T[0].C &= ~T_QUAL_CCONV;
+
+ /* Pointer to a function which doesn't have an explicit convention? */
+ if (IsTypeFunc (T + 1)) {
+ if (IsQualCConv (T + 1)) {
+ if ((T[1].C & T_QUAL_CCONV) == Q) {
+ Warning ("Pointer duplicates function's calling convention");
+ } else {
+ Error ("Function's and pointer's calling conventions are different");
+ }
+ } else {
+ if (Q == T_QUAL_FASTCALL && IsVariadicFunc (T + 1)) {
+ Error ("Variadic-function pointers cannot be __fastcall__");
+ } else {
+ /* Move the qualifier from the pointer to the function. */
+ T[1].C |= Q;
+ }
+ }
+ } else {
+ Error ("Not pointer to a function; can't use a calling convention");
+ }
+ }
+
+ /* Apply the default far and near qualifiers if none are given */
+ Q = (T[0].C & T_QUAL_ADDRSIZE);
+ if (Q == T_QUAL_NONE) {
+ /* No address size qualifiers specified */
+ if (IsTypeFunc (T+1)) {
+ /* Pointer to function. Use the qualifier from the function,
+ ** or the default if the function doesn't have one.
+ */
+ Q = (T[1].C & T_QUAL_ADDRSIZE);
+ if (Q == T_QUAL_NONE) {
+ Q = CodeAddrSizeQualifier ();
+ }
+ } else {
+ Q = DataAddrSizeQualifier ();
+ }
+ T[0].C |= Q;
+ } else {
+ /* We have address size qualifiers. If followed by a function,
+ ** apply them to the function also.
+ */
+ if (IsTypeFunc (T+1)) {
+ TypeCode FQ = (T[1].C & T_QUAL_ADDRSIZE);
+ if (FQ == T_QUAL_NONE) {
+ T[1].C |= Q;
+ } else if (FQ != Q) {
+ Error ("Address size qualifier mismatch");
+ T[1].C = (T[1].C & ~T_QUAL_ADDRSIZE) | Q;
+ }
+ }
+ }
+
+ } else if (IsTypeFunc (T)) {
+
+ /* Apply the default far and near qualifiers if none are given */
+ if ((T[0].C & T_QUAL_ADDRSIZE) == 0) {
+ T[0].C |= CodeAddrSizeQualifier ();
+ }
+
+ }
+ ++T;
+ }
}
/* Check the storage class given */
switch (CurTok.Tok) {
- case TOK_EXTERN:
- D->StorageClass = SC_EXTERN | SC_STATIC;
- NextToken ();
- break;
-
- case TOK_STATIC:
- D->StorageClass = SC_STATIC;
- NextToken ();
- break;
-
- case TOK_REGISTER:
- D->StorageClass = SC_REGISTER | SC_STATIC;
- NextToken ();
- break;
-
- case TOK_AUTO:
- D->StorageClass = SC_AUTO;
- NextToken ();
- break;
-
- case TOK_TYPEDEF:
- D->StorageClass = SC_TYPEDEF;
- NextToken ();
- break;
-
- default:
- /* No storage class given, use default */
- D->Flags |= DS_DEF_STORAGE;
- D->StorageClass = DefStorage;
- break;
+ case TOK_EXTERN:
+ D->StorageClass = SC_EXTERN | SC_STATIC;
+ NextToken ();
+ break;
+
+ case TOK_STATIC:
+ D->StorageClass = SC_STATIC;
+ NextToken ();
+ break;
+
+ case TOK_REGISTER:
+ D->StorageClass = SC_REGISTER | SC_STATIC;
+ NextToken ();
+ break;
+
+ case TOK_AUTO:
+ D->StorageClass = SC_AUTO;
+ NextToken ();
+ break;
+
+ case TOK_TYPEDEF:
+ D->StorageClass = SC_TYPEDEF;
+ NextToken ();
+ break;
+
+ default:
+ /* No storage class given, use default */
+ D->Flags |= DS_DEF_STORAGE;
+ D->StorageClass = DefStorage;
+ break;
}
}
/* Accept forward definitions */
if (CurTok.Tok != TOK_LCURLY) {
- return;
+ return;
}
/* Skip the opening curly brace */
EnumVal = 0;
while (CurTok.Tok != TOK_RCURLY) {
- /* We expect an identifier */
- if (CurTok.Tok != TOK_IDENT) {
- Error ("Identifier expected");
- continue;
- }
-
- /* Remember the identifier and skip it */
- strcpy (Ident, CurTok.Ident);
- NextToken ();
-
- /* Check for an assigned value */
- if (CurTok.Tok == TOK_ASSIGN) {
- ExprDesc lval;
- NextToken ();
- ConstExpr (&lval);
- EnumVal = lval.ConstVal;
- }
-
- /* Add an entry to the symbol table */
- AddConstSym (Ident, type_int, SC_ENUM, EnumVal++);
-
- /* Check for end of definition */
- if (CurTok.Tok != TOK_COMMA)
- break;
- NextToken ();
+ /* We expect an identifier */
+ if (CurTok.Tok != TOK_IDENT) {
+ Error ("Identifier expected");
+ continue;
+ }
+
+ /* Remember the identifier and skip it */
+ strcpy (Ident, CurTok.Ident);
+ NextToken ();
+
+ /* Check for an assigned value */
+ if (CurTok.Tok == TOK_ASSIGN) {
+ ExprDesc Expr;
+ NextToken ();
+ 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 != TOK_COMMA)
+ break;
+ NextToken ();
}
ConsumeRCurly ();
}
-static SymEntry* ParseStructDecl (const char* Name, type StructType)
-/* Parse a struct/union declaration. */
+static int ParseFieldWidth (Declaration* Decl)
+/* Parse an optional field width. Returns -1 if no field width is specified,
+** otherwise the width of the field.
+*/
{
+ ExprDesc Expr;
- unsigned Size;
- unsigned Offs;
+ if (CurTok.Tok != TOK_COLON) {
+ /* No bit-field declaration */
+ return -1;
+ }
+
+ /* Read the width */
+ NextToken ();
+ ConstAbsIntExpr (hie1, &Expr);
+ if (Expr.IVal < 0) {
+ Error ("Negative width in bit-field");
+ return -1;
+ }
+ if (Expr.IVal > (int) INT_BITS) {
+ Error ("Width of bit-field exceeds its type");
+ return -1;
+ }
+ if (Expr.IVal == 0 && Decl->Ident[0] != '\0') {
+ Error ("Zero width for named bit-field");
+ return -1;
+ }
+ if (!IsTypeInt (Decl->Type)) {
+ /* Only integer types may be used for bit-fields */
+ Error ("Bit-field has invalid type");
+ return -1;
+ }
+
+ /* Return the field width */
+ return (int) Expr.IVal;
+}
+
+
+
+static SymEntry* StructOrUnionForwardDecl (const char* Name, unsigned Type)
+/* Handle a struct or union forward decl */
+{
+ /* Try to find a struct/union with the given name. If there is none,
+ ** insert a forward declaration into the current lexical level.
+ */
+ SymEntry* Entry = FindTagSym (Name);
+ if (Entry == 0) {
+ Entry = AddStructSym (Name, Type, 0, 0);
+ } else if ((Entry->Flags & SC_TYPEMASK) != Type) {
+ /* Already defined, but no struct */
+ Error ("Symbol `%s' is already different kind", Name);
+ }
+ return Entry;
+}
+
+
+
+static unsigned CopyAnonStructFields (const Declaration* Decl, int Offs)
+/* Copy fields from an anon union/struct into the current lexical level. The
+** function returns the size of the embedded struct/union.
+*/
+{
+ /* Get the pointer to the symbol table entry of the anon struct */
+ SymEntry* Entry = GetSymEntry (Decl->Type);
+
+ /* Get the size of the anon struct */
+ unsigned Size = Entry->V.S.Size;
+
+ /* Get the symbol table containing the fields. If it is empty, there has
+ ** been an error before, so bail out.
+ */
+ SymTable* Tab = Entry->V.S.SymTab;
+ if (Tab == 0) {
+ /* Incomplete definition - has been flagged before */
+ return Size;
+ }
+
+ /* Get a pointer to the list of symbols. Then walk the list adding copies
+ ** of the embedded struct to the current level.
+ */
+ Entry = Tab->SymHead;
+ while (Entry) {
+
+ /* Enter a copy of this symbol adjusting the offset. We will just
+ ** reuse the type string here.
+ */
+ AddLocalSym (Entry->Name, Entry->Type, SC_STRUCTFIELD, Offs + Entry->V.Offs);
+
+ /* Currently, there can not be any attributes, but if there will be
+ ** some in the future, we want to know this.
+ */
+ CHECK (Entry->Attr == 0);
+
+ /* Next entry */
+ Entry = Entry->NextSym;
+ }
+
+ /* Return the size of the embedded struct */
+ return Size;
+}
+
+
+
+static SymEntry* ParseUnionDecl (const char* Name)
+/* Parse a union declaration. */
+{
+
+ unsigned UnionSize;
+ unsigned FieldSize;
+ int FieldWidth; /* Width in bits, -1 if not a bit-field */
+ SymTable* FieldTab;
+
+
+ if (CurTok.Tok != TOK_LCURLY) {
+ /* Just a forward declaration. */
+ return StructOrUnionForwardDecl (Name, SC_UNION);
+ }
+
+ /* Add a forward declaration for the struct in the current lexical level */
+ AddStructSym (Name, SC_UNION, 0, 0);
+
+ /* Skip the curly brace */
+ NextToken ();
+
+ /* Enter a new lexical level for the struct */
+ EnterStructLevel ();
+
+ /* Parse union fields */
+ UnionSize = 0;
+ while (CurTok.Tok != TOK_RCURLY) {
+
+ /* Get the type of the entry */
+ DeclSpec Spec;
+ InitDeclSpec (&Spec);
+ ParseTypeSpec (&Spec, -1, T_QUAL_NONE);
+
+ /* Read fields with this type */
+ while (1) {
+
+ Declaration Decl;
+
+ /* Get type and name of the struct field */
+ ParseDecl (&Spec, &Decl, DM_ACCEPT_IDENT);
+
+ /* Check for a bit-field declaration */
+ FieldWidth = ParseFieldWidth (&Decl);
+
+ /* Ignore zero sized bit fields in a union */
+ if (FieldWidth == 0) {
+ goto NextMember;
+ }
+
+ /* Check for fields without a name */
+ if (Decl.Ident[0] == '\0') {
+ /* In cc65 mode, we allow anonymous structs/unions within
+ ** a struct.
+ */
+ if (IS_Get (&Standard) >= STD_CC65 && IsClassStruct (Decl.Type)) {
+ /* This is an anonymous struct or union. Copy the fields
+ ** into the current level.
+ */
+ CopyAnonStructFields (&Decl, 0);
+
+ } else {
+ /* A non bit-field without a name is legal but useless */
+ Warning ("Declaration does not declare anything");
+ }
+ goto NextMember;
+ }
+
+ /* Handle sizes */
+ FieldSize = CheckedSizeOf (Decl.Type);
+ if (FieldSize > UnionSize) {
+ UnionSize = FieldSize;
+ }
+
+ /* Add a field entry to the table. */
+ if (FieldWidth > 0) {
+ AddBitField (Decl.Ident, 0, 0, FieldWidth);
+ } else {
+ AddLocalSym (Decl.Ident, Decl.Type, SC_STRUCTFIELD, 0);
+ }
+
+NextMember: if (CurTok.Tok != TOK_COMMA) {
+ break;
+ }
+ NextToken ();
+ }
+ ConsumeSemi ();
+ }
+
+ /* Skip the closing brace */
+ NextToken ();
+
+ /* Remember the symbol table and leave the struct level */
+ FieldTab = GetSymTab ();
+ LeaveStructLevel ();
+
+ /* Make a real entry from the forward decl and return it */
+ return AddStructSym (Name, SC_UNION, UnionSize, FieldTab);
+}
+
+
+
+static SymEntry* ParseStructDecl (const char* Name)
+/* Parse a struct declaration. */
+{
+
+ unsigned StructSize;
+ int FlexibleMember;
+ int BitOffs; /* Bit offset for bit-fields */
+ int FieldWidth; /* Width in bits, -1 if not a bit-field */
SymTable* FieldTab;
- SymEntry* Entry;
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.
- */
- Entry = FindTagSym (Name);
- if (Entry == 0) {
- Entry = AddStructSym (Name, 0, 0);
- } else if (SymIsLocal (Entry) && (Entry->Flags & SC_STRUCT) == 0) {
- /* Already defined in the level but no struct */
- Error ("Symbol `%s' is already different kind", Name);
- }
- return Entry;
+ /* Just a forward declaration. */
+ return StructOrUnionForwardDecl (Name, SC_STRUCT);
}
/* Add a forward declaration for the struct in the current lexical level */
- Entry = AddStructSym (Name, 0, 0);
+ AddStructSym (Name, SC_STRUCT, 0, 0);
/* Skip the curly brace */
NextToken ();
EnterStructLevel ();
/* Parse struct fields */
- Size = 0;
+ FlexibleMember = 0;
+ StructSize = 0;
+ BitOffs = 0;
while (CurTok.Tok != TOK_RCURLY) {
- /* Get the type of the entry */
- DeclSpec Spec;
- InitDeclSpec (&Spec);
- ParseTypeSpec (&Spec, -1);
-
- /* Read fields with this type */
- while (1) {
-
- /* Get type and name of the struct field */
- Declaration Decl;
- ParseDecl (&Spec, &Decl, 0);
-
- /* Add a field entry to the table */
- AddLocalSym (Decl.Ident, Decl.Type, SC_SFLD, (StructType == T_STRUCT)? Size : 0);
-
- /* 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;
- }
- }
-
- if (CurTok.Tok != TOK_COMMA)
- break;
- NextToken ();
- }
- ConsumeSemi ();
+ /* Get the type of the entry */
+ DeclSpec Spec;
+ InitDeclSpec (&Spec);
+ ParseTypeSpec (&Spec, -1, T_QUAL_NONE);
+
+ /* Read fields with this type */
+ while (1) {
+
+ Declaration Decl;
+ ident Ident;
+
+ /* 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, DM_ACCEPT_IDENT);
+
+ /* Check for a bit-field declaration */
+ FieldWidth = ParseFieldWidth (&Decl);
+
+ /* If this is not a bit field, or the bit field is too large for
+ ** the remainder of the current member, or we have a bit field
+ ** with width zero, align the struct to the next member by adding
+ ** a member with an anonymous name.
+ */
+ if (BitOffs > 0) {
+ if (FieldWidth <= 0 || (BitOffs + FieldWidth) > (int) INT_BITS) {
+
+ /* We need an anonymous name */
+ AnonName (Ident, "bit-field");
+
+ /* Add an anonymous bit-field that aligns to the next
+ ** storage unit.
+ */
+ AddBitField (Ident, StructSize, BitOffs, INT_BITS - BitOffs);
+
+ /* No bits left */
+ StructSize += SIZEOF_INT;
+ BitOffs = 0;
+ }
+ }
+
+ /* Apart from the above, a bit field with width 0 is not processed
+ ** further.
+ */
+ if (FieldWidth == 0) {
+ goto NextMember;
+ }
+
+ /* 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);
+ }
+
+ /* Check for fields without names */
+ if (Decl.Ident[0] == '\0') {
+ if (FieldWidth < 0) {
+ /* In cc65 mode, we allow anonymous structs/unions within
+ ** a struct.
+ */
+ if (IS_Get (&Standard) >= STD_CC65 && IsClassStruct (Decl.Type)) {
+
+ /* This is an anonymous struct or union. Copy the
+ ** fields into the current level.
+ */
+ StructSize += CopyAnonStructFields (&Decl, StructSize);
+
+ } else {
+ /* A non bit-field without a name is legal but useless */
+ Warning ("Declaration does not declare anything");
+ }
+ goto NextMember;
+ } else {
+ /* A bit-field without a name will get an anonymous one */
+ AnonName (Decl.Ident, "bit-field");
+ }
+ }
+
+ /* Add a field entry to the table */
+ if (FieldWidth > 0) {
+ /* Add full byte from the bit offset to the variable offset.
+ ** This simplifies handling he bit-field as a char type
+ ** in expressions.
+ */
+ unsigned Offs = StructSize + (BitOffs / CHAR_BITS);
+ AddBitField (Decl.Ident, Offs, BitOffs % CHAR_BITS, FieldWidth);
+ BitOffs += FieldWidth;
+ CHECK (BitOffs <= (int) INT_BITS);
+ if (BitOffs == INT_BITS) {
+ StructSize += SIZEOF_INT;
+ BitOffs = 0;
+ }
+ } else {
+ AddLocalSym (Decl.Ident, Decl.Type, SC_STRUCTFIELD, StructSize);
+ if (!FlexibleMember) {
+ StructSize += CheckedSizeOf (Decl.Type);
+ }
+ }
+
+NextMember: if (CurTok.Tok != TOK_COMMA) {
+ break;
+ }
+ NextToken ();
+ }
+ ConsumeSemi ();
+ }
+
+ /* If we have bits from bit-fields left, add them to the size. */
+ if (BitOffs > 0) {
+ StructSize += ((BitOffs + CHAR_BITS - 1) / CHAR_BITS);
}
/* Skip the closing brace */
LeaveStructLevel ();
/* Make a real entry from the forward decl and return it */
- return AddStructSym (Name, Size, FieldTab);
+ return AddStructSym (Name, SC_STRUCT, StructSize, FieldTab);
}
-static void ParseTypeSpec (DeclSpec* D, int Default)
-/* Parse a type specificier */
+static void ParseTypeSpec (DeclSpec* D, long Default, TypeCode Qualifiers)
+/* Parse a type specifier */
{
- ident Ident;
- SymEntry* Entry;
- type StructType;
- type Qualifiers; /* Type qualifiers */
+ ident Ident;
+ SymEntry* Entry;
/* 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 (T_QUAL_CONST | T_QUAL_VOLATILE);
/* Look at the data type */
switch (CurTok.Tok) {
- case TOK_VOID:
- NextToken ();
- D->Type[0] = T_VOID;
- D->Type[1] = T_END;
- break;
-
- case TOK_CHAR:
- NextToken ();
- D->Type[0] = GetDefaultChar();
- D->Type[1] = T_END;
- break;
-
- case TOK_LONG:
- NextToken ();
- if (CurTok.Tok == TOK_UNSIGNED) {
- NextToken ();
- optionalint ();
- D->Type[0] = T_ULONG;
- D->Type[1] = T_END;
- } else {
- optionalsigned ();
- optionalint ();
- D->Type[0] = T_LONG;
- D->Type[1] = T_END;
- }
- break;
-
- case TOK_SHORT:
- NextToken ();
- if (CurTok.Tok == TOK_UNSIGNED) {
- NextToken ();
- optionalint ();
- D->Type[0] = T_USHORT;
- D->Type[1] = T_END;
- } else {
- optionalsigned ();
- optionalint ();
- D->Type[0] = T_SHORT;
- D->Type[1] = T_END;
- }
- break;
-
- case TOK_INT:
- NextToken ();
- D->Type[0] = T_INT;
- D->Type[1] = T_END;
- break;
+ case TOK_VOID:
+ NextToken ();
+ D->Type[0].C = T_VOID;
+ D->Type[0].A.U = 0;
+ D->Type[1].C = T_END;
+ break;
+
+ case TOK_CHAR:
+ NextToken ();
+ D->Type[0].C = GetDefaultChar();
+ D->Type[1].C = T_END;
+ break;
+
+ case TOK_LONG:
+ NextToken ();
+ if (CurTok.Tok == TOK_UNSIGNED) {
+ NextToken ();
+ OptionalInt ();
+ D->Type[0].C = T_ULONG;
+ D->Type[1].C = T_END;
+ } else {
+ OptionalSigned ();
+ OptionalInt ();
+ D->Type[0].C = T_LONG;
+ D->Type[1].C = T_END;
+ }
+ break;
+
+ case TOK_SHORT:
+ NextToken ();
+ if (CurTok.Tok == TOK_UNSIGNED) {
+ NextToken ();
+ OptionalInt ();
+ D->Type[0].C = T_USHORT;
+ D->Type[1].C = T_END;
+ } else {
+ OptionalSigned ();
+ OptionalInt ();
+ D->Type[0].C = T_SHORT;
+ D->Type[1].C = T_END;
+ }
+ break;
+
+ case TOK_INT:
+ NextToken ();
+ D->Type[0].C = T_INT;
+ D->Type[1].C = T_END;
+ break;
case TOK_SIGNED:
- NextToken ();
- switch (CurTok.Tok) {
-
- case TOK_CHAR:
- NextToken ();
- D->Type[0] = T_SCHAR;
- D->Type[1] = T_END;
- break;
-
- case TOK_SHORT:
- NextToken ();
- optionalint ();
- D->Type[0] = T_SHORT;
- D->Type[1] = T_END;
- break;
-
- case TOK_LONG:
- NextToken ();
- optionalint ();
- D->Type[0] = T_LONG;
- D->Type[1] = T_END;
- break;
-
- case TOK_INT:
- NextToken ();
- /* FALL THROUGH */
-
- default:
- D->Type[0] = T_INT;
- D->Type[1] = T_END;
- break;
- }
- break;
-
- case TOK_UNSIGNED:
- NextToken ();
- switch (CurTok.Tok) {
-
- case TOK_CHAR:
- NextToken ();
- D->Type[0] = T_UCHAR;
- D->Type[1] = T_END;
- break;
-
- case TOK_SHORT:
- NextToken ();
- optionalint ();
- D->Type[0] = T_USHORT;
- D->Type[1] = T_END;
- break;
-
- case TOK_LONG:
- NextToken ();
- optionalint ();
- D->Type[0] = T_ULONG;
- D->Type[1] = T_END;
- break;
-
- case TOK_INT:
- NextToken ();
- /* FALL THROUGH */
-
- default:
- D->Type[0] = T_UINT;
- D->Type[1] = T_END;
- break;
- }
- break;
-
- case TOK_STRUCT:
- case TOK_UNION:
- StructType = (CurTok.Tok == TOK_STRUCT)? T_STRUCT : T_UNION;
- NextToken ();
- /* */
- if (CurTok.Tok == TOK_IDENT) {
- strcpy (Ident, CurTok.Ident);
- NextToken ();
- } else {
- AnonName (Ident, (StructType == T_STRUCT)? "struct" : "union");
- }
- /* Remember we have an extra type decl */
- D->Flags |= DS_EXTRA_TYPE;
- /* 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;
- break;
-
- case TOK_ENUM:
- NextToken ();
- if (CurTok.Tok != TOK_LCURLY) {
- /* Named enum */
- if (CurTok.Tok == TOK_IDENT) {
- /* Find an entry with this name */
- Entry = FindTagSym (CurTok.Ident);
- if (Entry) {
- if (SymIsLocal (Entry) && (Entry->Flags & SC_ENUM) == 0) {
- Error ("Symbol `%s' is already different kind", Entry->Name);
- }
- } else {
- /* Insert entry into table ### */
- }
- /* Skip the identifier */
- NextToken ();
- } else {
- Error ("Identifier expected");
- }
- }
- /* 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;
- break;
+ NextToken ();
+ switch (CurTok.Tok) {
+
+ case TOK_CHAR:
+ NextToken ();
+ D->Type[0].C = T_SCHAR;
+ D->Type[1].C = T_END;
+ break;
+
+ case TOK_SHORT:
+ NextToken ();
+ OptionalInt ();
+ D->Type[0].C = T_SHORT;
+ D->Type[1].C = T_END;
+ break;
+
+ case TOK_LONG:
+ NextToken ();
+ OptionalInt ();
+ D->Type[0].C = T_LONG;
+ D->Type[1].C = T_END;
+ break;
+
+ case TOK_INT:
+ NextToken ();
+ /* FALL THROUGH */
+
+ default:
+ D->Type[0].C = T_INT;
+ D->Type[1].C = T_END;
+ break;
+ }
+ break;
+
+ case TOK_UNSIGNED:
+ NextToken ();
+ switch (CurTok.Tok) {
+
+ case TOK_CHAR:
+ NextToken ();
+ D->Type[0].C = T_UCHAR;
+ D->Type[1].C = T_END;
+ break;
+
+ case TOK_SHORT:
+ NextToken ();
+ OptionalInt ();
+ D->Type[0].C = T_USHORT;
+ D->Type[1].C = T_END;
+ break;
+
+ case TOK_LONG:
+ NextToken ();
+ OptionalInt ();
+ D->Type[0].C = T_ULONG;
+ D->Type[1].C = T_END;
+ break;
+
+ case TOK_INT:
+ NextToken ();
+ /* FALL THROUGH */
+
+ default:
+ 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_UNION:
+ NextToken ();
+ /* */
+ if (CurTok.Tok == TOK_IDENT) {
+ strcpy (Ident, CurTok.Ident);
+ NextToken ();
+ } else {
+ AnonName (Ident, "union");
+ }
+ /* Remember we have an extra type decl */
+ D->Flags |= DS_EXTRA_TYPE;
+ /* Declare the union in the current scope */
+ Entry = ParseUnionDecl (Ident);
+ /* Encode the union entry into the type */
+ D->Type[0].C = T_UNION;
+ SetSymEntry (D->Type, Entry);
+ D->Type[1].C = T_END;
+ break;
+
+ case TOK_STRUCT:
+ NextToken ();
+ /* */
+ if (CurTok.Tok == TOK_IDENT) {
+ strcpy (Ident, CurTok.Ident);
+ NextToken ();
+ } else {
+ AnonName (Ident, "struct");
+ }
+ /* Remember we have an extra type decl */
+ D->Flags |= DS_EXTRA_TYPE;
+ /* Declare the struct in the current scope */
+ Entry = ParseStructDecl (Ident);
+ /* Encode the struct entry into the type */
+ D->Type[0].C = T_STRUCT;
+ SetSymEntry (D->Type, Entry);
+ D->Type[1].C = T_END;
+ break;
+
+ case TOK_ENUM:
+ NextToken ();
+ if (CurTok.Tok != TOK_LCURLY) {
+ /* Named enum */
+ if (CurTok.Tok == TOK_IDENT) {
+ /* Find an entry with this name */
+ Entry = FindTagSym (CurTok.Ident);
+ if (Entry) {
+ if (SymIsLocal (Entry) && (Entry->Flags & SC_ENUM) == 0) {
+ Error ("Symbol `%s' is already different kind", Entry->Name);
+ }
+ } else {
+ /* Insert entry into table ### */
+ }
+ /* Skip the identifier */
+ NextToken ();
+ } else {
+ Error ("Identifier expected");
+ }
+ }
+ /* Remember we have an extra type decl */
+ D->Flags |= DS_EXTRA_TYPE;
+ /* Parse the enum decl */
+ ParseEnumDecl ();
+ D->Type[0].C = T_INT;
+ D->Type[1].C = T_END;
+ break;
case TOK_IDENT:
- Entry = FindSym (CurTok.Ident);
- if (Entry && IsTypeDef (Entry)) {
- /* It's a typedef */
- NextToken ();
- 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;
- } else {
- D->Flags |= DS_DEF_TYPE;
- D->Type[0] = (type) Default;
- D->Type[1] = T_END;
- }
- break;
+ Entry = FindSym (CurTok.Ident);
+ if (Entry && SymIsTypeDef (Entry)) {
+ /* It's a typedef */
+ NextToken ();
+ TypeCopy (D->Type, Entry->Type);
+ break;
+ }
+ /* FALL THROUGH */
+
+ default:
+ if (Default < 0) {
+ Error ("Type expected");
+ D->Type[0].C = T_INT;
+ D->Type[1].C = T_END;
+ } else {
+ 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 |= (Qualifiers | OptionalQualifiers (T_QUAL_CONST | T_QUAL_VOLATILE));
}
-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.
- */
+** resulting type.
+*/
{
if (IsTypeArray (T)) {
- T += DECODE_SIZE;
- T[0] = T_PTR;
+ T->C = T_PTR;
}
return T;
}
static void ParseOldStyleParamList (FuncDesc* F)
/* Parse an old style (K&R) parameter list */
{
+ /* Some fix point tokens that are used for error recovery */
+ static const token_t TokenList[] = { TOK_COMMA, TOK_RPAREN, TOK_SEMI };
+
/* Parse params */
while (CurTok.Tok != TOK_RPAREN) {
- /* List of identifiers expected */
- if (CurTok.Tok != TOK_IDENT) {
- Error ("Identifier expected");
- }
+ /* List of identifiers expected */
+ if (CurTok.Tok == TOK_IDENT) {
+
+ /* Create a symbol table entry with type int */
+ AddLocalSym (CurTok.Ident, type_int, SC_AUTO | SC_PARAM | SC_DEF | SC_DEFTYPE, 0);
- /* Create a symbol table entry with type int */
- AddLocalSym (CurTok.Ident, type_int, SC_AUTO | SC_PARAM | SC_DEF, 0);
+ /* Count arguments */
+ ++F->ParamCount;
- /* Count arguments */
- ++F->ParamCount;
+ /* Skip the identifier */
+ NextToken ();
- /* Skip the identifier */
- NextToken ();
+ } else {
+ /* Not a parameter name */
+ Error ("Identifier expected");
- /* Check for more parameters */
- if (CurTok.Tok == TOK_COMMA) {
- NextToken ();
- } else {
- break;
- }
+ /* Try some smart error recovery */
+ SkipTokens (TokenList, sizeof(TokenList) / sizeof(TokenList[0]));
+ }
+
+ /* Check for more parameters */
+ if (CurTok.Tok == TOK_COMMA) {
+ NextToken ();
+ } else {
+ break;
+ }
}
/* Skip right paren. We must explicitly check for one here, since some of
- * the breaks above bail out without checking.
- */
+ ** the breaks above bail out without checking.
+ */
ConsumeRParen ();
/* An optional list of type specifications follows */
while (CurTok.Tok != TOK_LCURLY) {
- DeclSpec Spec;
-
- /* 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, since we use auto anyway.
- */
- if ((Spec.StorageClass & SC_AUTO) == 0 &&
- (Spec.StorageClass & SC_REGISTER) == 0) {
- Error ("Illegal storage class");
- }
-
- /* Parse a comma separated variable list */
- while (1) {
-
- 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 */
- SymEntry* Sym = FindLocalSym (Decl.Ident);
- if (Sym) {
- /* Found it, change the default type to the one given */
- ChangeSymType (Sym, ParamTypeCvt (Decl.Type));
- } else {
- Error ("Unknown identifier: `%s'", Decl.Ident);
- }
- }
-
- if (CurTok.Tok == TOK_COMMA) {
- NextToken ();
- } else {
- break;
- }
-
- }
-
- /* Variable list must be semicolon terminated */
- ConsumeSemi ();
+ DeclSpec Spec;
+
+ /* 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, since we use auto anyway.
+ */
+ if ((Spec.StorageClass & SC_AUTO) == 0 &&
+ (Spec.StorageClass & SC_REGISTER) == 0) {
+ Error ("Illegal storage class");
+ }
+
+ /* Parse a comma separated variable list */
+ while (1) {
+
+ 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 */
+ SymEntry* Sym = FindLocalSym (Decl.Ident);
+ if (Sym) {
+ /* 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 == TOK_COMMA) {
+ NextToken ();
+ } else {
+ break;
+ }
+
+ }
+
+ /* Variable list must be semicolon terminated */
+ ConsumeSemi ();
}
}
/* Parse params */
while (CurTok.Tok != TOK_RPAREN) {
- DeclSpec Spec;
- Declaration Decl;
- DeclAttr Attr;
-
- /* Allow an ellipsis as last parameter */
- 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) {
- Error ("Illegal storage class");
- }
- 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.
- */
- ParseDecl (&Spec, &Decl, DM_ACCEPT_IDENT);
- if (Decl.Ident[0] == '\0') {
-
- /* Unnamed symbol. Generate a name that is not user accessible,
- * then handle the symbol normal.
- */
- AnonName (Decl.Ident, "param");
- F->Flags |= FD_UNNAMED_PARAMS;
-
- /* Clear defined bit on nonames */
- Spec.StorageClass &= ~SC_DEF;
- }
-
- /* Parse an attribute ### */
- ParseAttribute (&Decl, &Attr);
-
- /* Create a symbol table entry */
- AddLocalSym (Decl.Ident, ParamTypeCvt (Decl.Type), Spec.StorageClass, 0);
-
- /* Count arguments */
- ++F->ParamCount;
-
- /* Check for more parameters */
- if (CurTok.Tok == TOK_COMMA) {
- NextToken ();
- } else {
- break;
- }
+ DeclSpec Spec;
+ Declaration Decl;
+ SymEntry* Sym;
+
+ /* Allow an ellipsis as last parameter */
+ 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 */
+ 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;
+ }
+
+ /* Allow parameters without a name, but remember if we had some to
+ ** eventually print an error message later.
+ */
+ ParseDecl (&Spec, &Decl, DM_ACCEPT_IDENT);
+ if (Decl.Ident[0] == '\0') {
+
+ /* Unnamed symbol. Generate a name that is not user accessible,
+ ** then handle the symbol normal.
+ */
+ AnonName (Decl.Ident, "param");
+ F->Flags |= FD_UNNAMED_PARAMS;
+
+ /* Clear defined bit on nonames */
+ Decl.StorageClass &= ~SC_DEF;
+ }
+
+ /* Parse attributes for this parameter */
+ ParseAttribute (&Decl);
+
+ /* Create a symbol table entry */
+ Sym = AddLocalSym (Decl.Ident, ParamTypeCvt (Decl.Type), Decl.StorageClass, 0);
+
+ /* Add attributes if we have any */
+ SymUseAttr (Sym, &Decl);
+
+ /* If the parameter is a struct or union, emit a warning */
+ if (IsClassStruct (Decl.Type)) {
+ if (IS_Get (&WarnStructParam)) {
+ Warning ("Passing struct by value for parameter `%s'", Decl.Ident);
+ }
+ }
+
+ /* Count arguments */
+ ++F->ParamCount;
+
+ /* Check for more parameters */
+ if (CurTok.Tok == TOK_COMMA) {
+ NextToken ();
+ } else {
+ break;
+ }
}
/* Skip right paren. We must explicitly check for one here, since some of
- * the breaks above bail out without checking.
- */
+ ** the breaks above bail out without checking.
+ */
ConsumeRParen ();
-
- /* Check if this is a function definition */
- if (CurTok.Tok == TOK_LCURLY) {
- /* Print an error if in strict ANSI mode and we have unnamed
- * parameters.
- */
- if (ANSI && (F->Flags & FD_UNNAMED_PARAMS) != 0) {
- Error ("Parameter name omitted");
- }
- }
}
/* Check for several special parameter lists */
if (CurTok.Tok == TOK_RPAREN) {
- /* Parameter list is empty */
- F->Flags |= (FD_EMPTY | FD_VARIADIC);
+ /* Parameter list is empty */
+ F->Flags |= (FD_EMPTY | FD_VARIADIC);
} else if (CurTok.Tok == TOK_VOID && NextTok.Tok == TOK_RPAREN) {
- /* Parameter list declared as void */
- NextToken ();
- F->Flags |= FD_VOID_PARAM;
+ /* Parameter list declared as void */
+ NextToken ();
+ F->Flags |= FD_VOID_PARAM;
} 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 || !IsTypeDef (Sym)) {
- /* Old style (K&R) function. Assume variable param list. */
- F->Flags |= (FD_OLDSTYLE | FD_VARIADIC);
- }
+ (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 */
if ((F->Flags & FD_OLDSTYLE) == 0) {
- /* New style function */
- ParseAnsiParamList (F);
+
+ /* New style function */
+ ParseAnsiParamList (F);
+
} else {
- /* Old style function */
- ParseOldStyleParamList (F);
+ /* Old style function */
+ 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).
- */
+ ** 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;
- Offs += Size;
- F->ParamSize += Size;
- Sym = Sym->PrevSym;
+ 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;
}
/* Leave the lexical level remembering the symbol tables */
-static void Decl (Declaration* D, unsigned Mode)
+static void Declarator (const DeclSpec* Spec, Declaration* D, declmode_t Mode)
/* Recursively process declarators. Build a type array in reverse order. */
{
-
+ /* Read optional function or pointer qualifiers. They modify the
+ ** identifier or token to the right. For convenience, we allow a calling
+ ** convention also for pointers here. If it's a pointer-to-function, the
+ ** qualifier later will be transfered to the function itself. If it's a
+ ** pointer to something else, it will be flagged as an error.
+ */
+ TypeCode Qualifiers = OptionalQualifiers (T_QUAL_ADDRSIZE | T_QUAL_CCONV);
+
+ /* Pointer to something */
if (CurTok.Tok == TOK_STAR) {
- type T = T_PTR;
- NextToken ();
- /* Allow optional const or volatile qualifiers */
- T |= OptionalQualifiers (T_QUAL_NONE);
- Decl (D, Mode);
- *D->T++ = T;
- return;
- } else if (CurTok.Tok == TOK_LPAREN) {
- NextToken ();
- Decl (D, Mode);
- ConsumeRParen ();
- } else if (CurTok.Tok == 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) && !IsTypeFuncPtr (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 = GetFuncDesc (T);
- F->Flags |= FD_FASTCALL;
- }
- return;
+
+ /* Skip the star */
+ NextToken ();
+
+ /* Allow const, restrict, and volatile qualifiers */
+ Qualifiers |= OptionalQualifiers (T_QUAL_CONST | T_QUAL_VOLATILE | T_QUAL_RESTRICT);
+
+ /* Parse the type that the pointer points to */
+ Declarator (Spec, D, Mode);
+
+ /* Add the type */
+ AddTypeToDeclaration (D, T_PTR | Qualifiers);
+ return;
+ }
+
+ if (CurTok.Tok == TOK_LPAREN) {
+ NextToken ();
+ Declarator (Spec, D, Mode);
+ ConsumeRParen ();
} 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
- * (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.
- */
- if (Mode == DM_NO_IDENT) {
- D->Ident[0] = '\0';
- } else if (CurTok.Tok == TOK_IDENT) {
- strcpy (D->Ident, CurTok.Ident);
- NextToken ();
- } else {
- if (Mode == DM_NEED_IDENT) {
- Error ("Identifier expected");
- }
- D->Ident[0] = '\0';
- return;
- }
+ /* 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
+ ** (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.
+ */
+ if (Mode == DM_NO_IDENT) {
+ D->Ident[0] = '\0';
+ } else if (CurTok.Tok == TOK_IDENT) {
+ strcpy (D->Ident, CurTok.Ident);
+ NextToken ();
+ } else {
+ if (Mode == DM_NEED_IDENT) {
+ Error ("Identifier expected");
+ }
+ D->Ident[0] = '\0';
+ }
}
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 ();
- *D->T++ = T_FUNC;
- EncodePtr (D->T, F);
- D->T += DECODE_SIZE;
- } else {
- /* Array declaration */
- unsigned long Size = 0;
- NextToken ();
- /* Read the size if it is given */
- if (CurTok.Tok != TOK_RBRACK) {
- ExprDesc lval;
- ConstExpr (&lval);
- Size = lval.ConstVal;
- }
- ConsumeRBrack ();
- *D->T++ = T_ARRAY;
- Encode (D->T, Size);
- D->T += DECODE_SIZE;
- }
+ if (CurTok.Tok == TOK_LPAREN) {
+
+ /* Function declaration */
+ FuncDesc* F;
+
+ /* Skip the opening paren */
+ NextToken ();
+
+ /* Parse the function declaration */
+ F = ParseFuncDecl ();
+
+ /* We cannot specify fastcall for variadic functions */
+ if ((F->Flags & FD_VARIADIC) && (Qualifiers & T_QUAL_FASTCALL)) {
+ Error ("Variadic functions cannot be __fastcall__");
+ Qualifiers &= ~T_QUAL_FASTCALL;
+ }
+
+ /* Add the function type. Be sure to bounds check the type buffer */
+ NeedTypeSpace (D, 1);
+ D->Type[D->Index].C = T_FUNC | Qualifiers;
+ D->Type[D->Index].A.P = F;
+ ++D->Index;
+
+ /* Qualifiers now used */
+ Qualifiers = T_QUAL_NONE;
+
+ } else {
+ /* Array declaration. */
+ long Size = UNSPECIFIED;
+
+ /* We cannot have any qualifiers for an array */
+ if (Qualifiers != T_QUAL_NONE) {
+ Error ("Invalid qualifiers for array");
+ Qualifiers = T_QUAL_NONE;
+ }
+
+ /* Skip the left bracket */
+ NextToken ();
+
+ /* 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;
+ }
+
+ /* Skip the right bracket */
+ ConsumeRBrack ();
+
+ /* Add the array type with the size to the type */
+ NeedTypeSpace (D, 1);
+ D->Type[D->Index].C = T_ARRAY;
+ D->Type[D->Index].A.L = Size;
+ ++D->Index;
+ }
+ }
+
+ /* If we have remaining qualifiers, flag them as invalid */
+ if (Qualifiers & T_QUAL_NEAR) {
+ Error ("Invalid `__near__' qualifier");
+ }
+ if (Qualifiers & T_QUAL_FAR) {
+ Error ("Invalid `__far__' qualifier");
+ }
+ if (Qualifiers & T_QUAL_FASTCALL) {
+ Error ("Invalid `__fastcall__' qualifier");
+ }
+ if (Qualifiers & T_QUAL_CDECL) {
+ Error ("Invalid `__cdecl__' qualifier");
}
}
/*****************************************************************************/
-/* code */
+/* code */
/*****************************************************************************/
-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);
+ TypeCopy (T, Decl.Type);
/* Return a pointer to the target buffer */
- return Type;
+ return T;
}
-void ParseDecl (const DeclSpec* Spec, Declaration* D, unsigned Mode)
+void ParseDecl (const DeclSpec* Spec, Declaration* D, declmode_t Mode)
/* Parse a variable, type or function declaration */
{
/* Initialize the Declaration struct */
InitDeclaration (D);
/* Get additional declarators and the identifier */
- Decl (D, Mode);
+ Declarator (Spec, D, Mode);
/* Add the base type. */
- TypeCpy (D->T, Spec->Type);
+ NeedTypeSpace (D, TypeLen (Spec->Type) + 1); /* Bounds check */
+ TypeCopy (D->Type + D->Index, Spec->Type);
+
+ /* Use the storage class from the declspec */
+ D->StorageClass = Spec->StorageClass;
+
+ /* Do several fixes on qualifiers */
+ FixQualifiers (D->Type);
+
+ /* If we have a function, add a special storage class */
+ if (IsTypeFunc (D->Type)) {
+ D->StorageClass |= SC_FUNC;
+ }
+
+ /* Parse attributes for this declaration */
+ ParseAttribute (D);
+
+ /* 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;
+ }
+
+ }
+
+ /* For anthing that is not a function or typedef, check for an implicit
+ ** int declaration.
+ */
+ if ((D->StorageClass & SC_FUNC) != SC_FUNC &&
+ (D->StorageClass & SC_TYPEMASK) != SC_TYPEDEF) {
+ /* If the standard was not set explicitly to C89, print a warning
+ ** for variables with implicit int type.
+ */
+ if ((Spec->Flags & DS_DEF_TYPE) != 0 && IS_Get (&Standard) >= STD_C99) {
+ Warning ("Implicit `int' is an obsolete feature");
+ }
+ }
/* 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_CONST | T_QUAL_VOLATILE);
+
+ /* 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);
}
void CheckEmptyDecl (const DeclSpec* D)
/* Called after an empty type declaration (that is, a type declaration without
- * a variable). Checks if the declaration does really make sense and issues a
- * warning if not.
- */
+** a variable). Checks if the declaration does really make sense and issues a
+** warning if not.
+*/
{
if ((D->Flags & DS_EXTRA_TYPE) == 0) {
- Warning ("Useless declaration");
+ Warning ("Useless declaration");
}
}
-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.
+*/
{
- ExprDesc 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.Type[0]) {
-
- case T_SCHAR:
- case T_UCHAR:
- if ((lval.Flags & E_MCTYPE) == E_TCONST) {
- /* Make it byte sized */
- lval.ConstVal &= 0xFF;
- }
- DefineData (&lval);
- 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);
- break;
-
- case T_LONG:
- case T_ULONG:
- DefineData (&lval);
- break;
-
- default:
- Error ("Illegal type in initialization");
- break;
-
- }
-
- if (CurTok.Tok != TOK_COMMA) {
- break;
- }
- NextToken ();
- } while (CurTok.Tok != TOK_RCURLY);
- ConsumeRCurly ();
+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;
+}
+
+
+
+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;
+ }
}
-static void ParseStructInit (type* Type)
-/* Parse initialization of a struct or union */
+static void DefineData (ExprDesc* Expr)
+/* Output a data definition for the given expression */
{
- SymEntry* Entry;
- SymTable* Tab;
+ 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 OutputBitFieldData (StructInitData* SI)
+/* Output bit field data */
+{
+ /* Ignore if we have no data */
+ if (SI->ValBits > 0) {
+
+ /* Output the data */
+ g_defdata (CF_INT | CF_UNSIGNED | CF_CONST, SI->BitVal, 0);
+
+ /* Clear the data from SI and account for the size */
+ SI->BitVal = 0;
+ SI->ValBits = 0;
+ SI->Offs += SIZEOF_INT;
+ }
+}
+
+
+
+static void ParseScalarInitInternal (Type* T, ExprDesc* ED)
+/* Parse initializaton for scalar data types. This function will not output the
+** data but return it in 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);
+
+ /* Close eventually opening braces */
+ ClosingCurlyBraces (BraceCount);
+}
+
+
+
+static unsigned ParseScalarInit (Type* T)
+/* Parse initializaton for scalar data types. Return the number of data bytes. */
+{
+ ExprDesc ED;
+
+ /* Parse initialization */
+ ParseScalarInitInternal (T, &ED);
+
+ /* Output the data */
+ DefineData (&ED);
+
+ /* 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_WCSCONST ||
+ (CurTok.Tok == TOK_LCURLY &&
+ (NextTok.Tok == TOK_SCONST || NextTok.Tok == TOK_WCSCONST)))) {
+
+ /* Char array initialized by string constant */
+ int NeedParen;
+
+ /* If we initializer is enclosed in brackets, remember this fact and
+ ** skip the opening bracket.
+ */
+ NeedParen = (CurTok.Tok == TOK_LCURLY);
+ if (NeedParen) {
+ NextToken ();
+ }
+
+ /* Translate into target charset */
+ TranslateLiteral (CurTok.SVal);
+
+ /* If the array is one too small for the string literal, omit the
+ ** trailing zero.
+ */
+ Count = GetLiteralSize (CurTok.SVal);
+ if (ElementCount != UNSPECIFIED &&
+ ElementCount != FLEXIBLE &&
+ Count == ElementCount + 1) {
+ /* Omit the trailing zero */
+ --Count;
+ }
+
+ /* Output the data */
+ g_defbytes (GetLiteralStr (CurTok.SVal), Count);
+
+ /* Skip the string */
+ 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;
+ StructInitData SI;
+
/* 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 */
+ SI.Size = Entry->V.S.Size;
/* Check if this struct definition has a field table. If it doesn't, it
- * is an incomplete definition.
- */
+ ** 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;
+ Error ("Cannot initialize variables with incomplete type");
+ /* Try error recovery */
+ SkipInitializer (1);
+ /* Nothing initialized */
+ return 0;
}
/* Get a pointer to the list of symbols */
Entry = Tab->SymHead;
+
+ /* Initialize fields */
+ SI.Offs = 0;
+ SI.BitVal = 0;
+ SI.ValBits = 0;
while (CurTok.Tok != TOK_RCURLY) {
- if (Entry == 0) {
- Error ("Too many initializers");
- return;
- }
- ParseInit (Entry->Type);
- Entry = Entry->NextSym;
- if (CurTok.Tok != TOK_COMMA)
- break;
- NextToken ();
+
+ /* */
+ if (Entry == 0) {
+ Error ("Too many initializers");
+ SkipInitializer (1);
+ return SI.Offs;
+ }
+
+ /* Parse initialization of one field. Bit-fields need a special
+ ** handling.
+ */
+ if (SymIsBitField (Entry)) {
+
+ ExprDesc ED;
+ unsigned Val;
+ unsigned Shift;
+
+ /* Calculate the bitmask from the bit-field data */
+ unsigned Mask = (1U << Entry->V.B.BitWidth) - 1U;
+
+ /* Safety ... */
+ CHECK (Entry->V.B.Offs * CHAR_BITS + Entry->V.B.BitOffs ==
+ SI.Offs * CHAR_BITS + SI.ValBits);
+
+ /* This may be an anonymous bit-field, in which case it doesn't
+ ** have an initializer.
+ */
+ if (IsAnonName (Entry->Name)) {
+ /* Account for the data and output it if we have a full word */
+ SI.ValBits += Entry->V.B.BitWidth;
+ CHECK (SI.ValBits <= INT_BITS);
+ if (SI.ValBits == INT_BITS) {
+ OutputBitFieldData (&SI);
+ }
+ goto NextMember;
+ } else {
+ /* Read the data, check for a constant integer, do a range
+ ** check.
+ */
+ ParseScalarInitInternal (type_uint, &ED);
+ if (!ED_IsConstAbsInt (&ED)) {
+ Error ("Constant initializer expected");
+ ED_MakeConstAbsInt (&ED, 1);
+ }
+ if (ED.IVal > (long) Mask) {
+ Warning ("Truncating value in bit-field initializer");
+ ED.IVal &= (long) Mask;
+ }
+ Val = (unsigned) ED.IVal;
+ }
+
+ /* Add the value to the currently stored bit-field value */
+ Shift = (Entry->V.B.Offs - SI.Offs) * CHAR_BITS + Entry->V.B.BitOffs;
+ SI.BitVal |= (Val << Shift);
+
+ /* Account for the data and output it if we have a full word */
+ SI.ValBits += Entry->V.B.BitWidth;
+ CHECK (SI.ValBits <= INT_BITS);
+ if (SI.ValBits == INT_BITS) {
+ OutputBitFieldData (&SI);
+ }
+
+ } else {
+
+ /* Standard member. We should never have stuff from a
+ ** bit-field left
+ */
+ CHECK (SI.ValBits == 0);
+
+ /* Flexible array members may only be initialized if they are
+ ** the last field (or part of the last struct field).
+ */
+ SI.Offs += ParseInitInternal (Entry->Type, AllowFlexibleMembers && Entry->NextSym == 0);
+ }
+
+ /* More initializers? */
+ if (CurTok.Tok != TOK_COMMA) {
+ break;
+ }
+
+ /* Skip the comma */
+ NextToken ();
+
+NextMember:
+ /* Next member. For unions, only the first one can be initialized */
+ if (IsTypeUnion (T)) {
+ /* Union */
+ Entry = 0;
+ } else {
+ /* Struct */
+ Entry = Entry->NextSym;
+ }
}
/* Consume the closing curly brace */
ConsumeRCurly ();
+ /* If we have data from a bit-field left, output it now */
+ OutputBitFieldData (&SI);
+
/* If there are struct fields left, reserve additional storage */
- while (Entry) {
- g_zerobytes (SizeOf (Entry->Type));
- Entry = Entry->NextSym;
+ if (SI.Offs < SI.Size) {
+ g_zerobytes (SI.Size - SI.Offs);
+ SI.Offs = SI.Size;
}
+
+ /* Return the actual number of bytes initialized. This number may be
+ ** larger than sizeof (Struct) if flexible array members are present and
+ ** were initialized (possible in non ANSI mode).
+ */
+ return SI.Offs;
}
-void ParseInit (type* T)
-/* Parse initialization of variables. */
+static unsigned ParseVoidInit (Type* T)
+/* Parse an initialization of a void variable (special cc65 extension).
+** Return the number of bytes initialized.
+*/
{
- ExprDesc lval;
- type* t;
- const char* str;
- int Count;
- int Size;
-
- 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);
- break;
-
- 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);
- break;
-
- 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);
- break;
-
- case T_ARRAY:
- Size = Decode (T + 1);
- t = T + DECODE_SIZE + 1;
- if (IsTypeChar(t) && CurTok.Tok == TOK_SCONST) {
- str = GetLiteral (CurTok.IVal);
- Count = strlen (str) + 1;
- 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 (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;
+ 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 ();
+
+ /* Number of bytes determined by initializer */
+ T->A.U = Size;
+
+ /* Return the number of bytes initialized */
+ return Size;
+}
+
+
+
+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:
+ case T_SHORT:
+ case T_USHORT:
+ case T_INT:
+ case T_UINT:
+ case T_LONG:
+ case T_ULONG:
+ case T_FLOAT:
+ case T_DOUBLE:
+ return ParseScalarInit (T);
+
+ case T_PTR:
+ return ParsePointerInit (T);
+
+ case T_ARRAY:
+ return ParseArrayInit (T, AllowFlexibleMembers);
case T_STRUCT:
case T_UNION:
- ParseStructInit (T);
- break;
+ return ParseStructInit (T, AllowFlexibleMembers);
- case T_VOID:
- if (!ANSI) {
- /* Special cc65 extension in non ANSI mode */
- ParseVoidInit ();
- break;
- }
- /* FALLTHROUGH */
+ case T_VOID:
+ if (IS_Get (&Standard) == STD_CC65) {
+ /* Special cc65 extension in non-ANSI mode */
+ return ParseVoidInit (T);
+ }
+ /* FALLTHROUGH */
- default:
- Error ("Illegal type");
- break;
+ default:
+ Error ("Illegal type");
+ 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