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types.c
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/****************************************************************************
*
* This code is Public Domain.
*
* ========================================================================
*
* Description: STRUCT, UNION, RECORD and TYPEDEF directives.
*
****************************************************************************/
#include <ctype.h>
#include "globals.h"
#include "memalloc.h"
#include "parser.h"
#include "segment.h"
#include "proc.h"
#include "input.h"
#include "tokenize.h"
#include "types.h"
#include "expreval.h"
#include "label.h"
#include "listing.h"
#include "fastpass.h"
#include "myassert.h"
/* v2.04: changed to 0 */
//#define ANYNAME 1 /* fixme: this probably should be changed to 0 */
#define ANYNAME 0
#define TYPEOPT 0
#if AMD64_SUPPORT
#define MAXRECBITS ( ModuleInfo.Ofssize == USE64 ? 64 : 32 )
#else
#define MAXRECBITS 32
#endif
struct dsym *CurrStruct;
static struct dsym *redef_struct;
/* text constants for 'Non-benign <x> redefinition' error msg */
static const char szStructure[] = "structure";
static const char szRecord[] = "record";
static const char szNonUnique[] = "NONUNIQUE";
void TypesInit( void )
/********************/
{
CurrStruct = NULL;
redef_struct = NULL;
}
/* create a SYM_TYPE symbol.
* <sym> must be NULL or of state SYM_UNDEFINED.
* <name> and <global> are only used if <sym> is NULL.
* <name> might be an empty string.
*/
struct asym *CreateTypeSymbol( struct asym *sym, const char *name, bool global )
/******************************************************************************/
{
struct struct_info *si;
if ( sym )
sym_remove_table( &SymTables[TAB_UNDEF], (struct dsym *)sym );
else
sym = ( global ? SymCreate( name ) : SymAlloc( name ) );
if ( sym ) {
sym->state = SYM_TYPE;
sym->typekind = TYPE_NONE;
((struct dsym *)sym)->e.structinfo = si = LclAlloc( sizeof( struct struct_info ) );
si->head = NULL;
si->tail = NULL;
si->alignment = 0;
si->flags = 0;
}
return( sym );
}
/* search a name in a struct's fieldlist */
struct asym *SearchNameInStruct( const struct asym *tstruct, const char *name, uint_32 *poffset, int level )
/**********************************************************************************************************/
{
int len = strlen( name );
struct sfield *fl = ((struct dsym *)tstruct)->e.structinfo->head;
struct asym *sym = NULL;
//if (ModuleInfo.oldstructs == TRUE) {
// return( SymSearch( name ) );
//}
if ( level >= MAX_STRUCT_NESTING ) {
EmitError( NESTING_LEVEL_TOO_DEEP );
return( NULL );
}
level++;
for ( ; fl; fl = fl->next ) {
/* recursion: if member has no name, check if it is a structure
and scan this structure's fieldlist then */
if ( *( fl->sym.name ) == NULLC ) {
/* there are 2 cases: an anonymous inline struct ... */
if ( fl->sym.state == SYM_TYPE ) {
if ( sym = SearchNameInStruct( &fl->sym, name, poffset, level ) ) {
*poffset += fl->sym.offset;
break;
}
/* or an anonymous structured field */
} else if ( fl->sym.mem_type == MT_TYPE ) {
if ( sym = SearchNameInStruct( fl->sym.type, name, poffset, level ) ) {
*poffset += fl->sym.offset;
break;
}
}
} else if ( len == fl->sym.name_size && SymCmpFunc( name, fl->sym.name, len ) == 0 ) {
DebugMsg(("SearchNameInStruct: '%s' found in struct %s\n", name, tstruct->name ));
sym = &fl->sym;
break;
}
}
return( sym );
}
/* check if a struct has changed */
static bool AreStructsEqual( const struct dsym *newstr, const struct dsym *oldstr )
/*********************************************************************************/
{
struct sfield *fold = oldstr->e.structinfo->head;
struct sfield *fnew = newstr->e.structinfo->head;
DebugMsg(("AreStructsEqual(%s) enter\n", oldstr->sym.name ));
/* kind of structs must be identical */
if ( oldstr->sym.typekind != newstr->sym.typekind )
return( FALSE );
for ( ; fold; fold = fold->next, fnew = fnew->next ) {
if ( !fnew ) {
DebugMsg(("AreStructsEqual: fields don't match\n"));
return( FALSE );
}
/* for global member names, don't check the name if it's "" */
if ( ModuleInfo.oldstructs && *fnew->sym.name == NULLC )
;
else if ( 0 != strcmp( fold->sym.name, fnew->sym.name ) ) {
DebugMsg(("AreStructsEqual: type name of field changed\n"));
return( FALSE );
}
if ( fold->sym.offset != fnew->sym.offset ) {
DebugMsg(("AreStructsEqual: offset of field %s changed: %u - %u\n", fold->sym.name, fold->sym.offset, fnew->sym.offset));
return( FALSE );
}
if ( fold->sym.total_size != fnew->sym.total_size ) {
DebugMsg(("AreStructsEqual: total_size of field changed\n"));
return( FALSE );
}
}
if ( fnew )
return( FALSE );
return( TRUE );
}
/* handle STRUCT, STRUC, UNION directives
* i = index of directive token
*/
ret_code StructDirective( int i, struct asm_tok tokenarray[] )
/************************************************************/
{
char *name;
unsigned alignment;
uint_32 offset;
uint_8 typekind = ( tokenarray[i].tokval == T_UNION ? TYPE_UNION : TYPE_STRUCT );
//unsigned int size;
struct asym *sym;
struct dsym *dir;
DebugMsg1(("StructDirective(%s) enter, i=%u, CurrStruct=%s\n", tokenarray[i].string_ptr, i, CurrStruct ? CurrStruct->sym.name : "NULL" ));
/* top level structs/unions must have an identifier at pos 0.
* for embedded structs, the directive must be at pos 0,
* an identifier is optional then.
*/
if (( CurrStruct == NULL && i != 1 ) ||
( CurrStruct != NULL && i != 0 ) ) {
DebugMsg(("StructDirective(%s): error: either currstruct or i must be 0\n", tokenarray[i].string_ptr ));
return( EmitErr( SYNTAX_ERROR_EX, tokenarray[i].string_ptr ) );
}
alignment = ( 1 << ModuleInfo.fieldalign );
i++; /* go past STRUCT/UNION */
if ( i == 1 ) { /* embedded struct? */
/* scan for the optional name */
#if ANYNAME
/* the name might be a reserved word!
* Masm won't allow those.
*/
//if ( tokenarray[i].token != T_FINAL && is_valid_id_first_char(*(tokenarray[i].string_ptr) ) ) {
#else
if ( tokenarray[i].token == T_ID ) {
#endif
name = tokenarray[i].string_ptr;
i++;
} else {
name = "";
}
} else {
name = tokenarray[0].string_ptr;
}
/* get an optional alignment argument: 1,2,4,8,16 or 32 */
if ( CurrStruct == NULL && tokenarray[i].token != T_FINAL ) {
int power;
struct expr opndx;
/* get the optional alignment parameter.
* forward references aren't accepted, but EXPF_NOUNDEF isn't used here!
*/
if ( EvalOperand( &i, tokenarray, Token_Count, &opndx, 0 ) != ERROR ) {
/* an empty expression is accepted */
if ( opndx.kind == EXPR_EMPTY ) {
;
} else if ( opndx.kind != EXPR_CONST ) {
/* v2.09: better error msg */
if ( opndx.sym && opndx.sym->state == SYM_UNDEFINED )
EmitErr( SYMBOL_NOT_DEFINED, opndx.sym->name );
else
EmitError( CONSTANT_EXPECTED );
} else if( opndx.value > MAX_STRUCT_ALIGN ) {
EmitError( STRUCT_ALIGN_TOO_HIGH );
} else {
for( power = 1; power < opndx.value; power <<= 1 );
if( power != opndx.value ) {
EmitErr( POWER_OF_2, opndx.value );
} else
alignment = opndx.value;
}
DebugMsg1(("StructDirective(%s) alignment=%u\n", name, alignment));
}
/* there might also be the NONUNIQUE parameter */
if ( tokenarray[i].token == T_COMMA ) {
i++;
if ( tokenarray[i].token == T_ID &&
(_stricmp( tokenarray[i].string_ptr, szNonUnique ) == 0 ) ) {
/* currently NONUNIQUE is ignored */
EmitWarn( 2, TOKEN_IGNORED, szNonUnique );
i++;
}
}
}
if ( tokenarray[i].token != T_FINAL ) {
DebugMsg(("StructDirective(%s): error: unexpected token %u >%s<\n", tokenarray[i].token, tokenarray[i].tokpos ));
return( EmitErr( SYNTAX_ERROR_EX, tokenarray[i].tokpos ) );
}
/* does struct have a name? */
if ( *name ) {
if ( CurrStruct == NULL ) {
/* the "top-level" struct is part of the global namespace */
sym = SymSearch( name );
DebugMsg1(("StructDirective: SymSearch (%s)=%X (curr struct=%X)\n", name, sym, CurrStruct ));
} else {
sym = SearchNameInStruct( (struct asym *)CurrStruct, name, &offset, 0 );
DebugMsg1(("StructDirective(%s): SearchNameInStruc()=%X\n", name, sym));
}
} else {
sym = NULL; /* anonymous struct */
}
if ( ModuleInfo.list ) {
if ( CurrStruct )
LstWrite( LSTTYPE_STRUCT, CurrStruct->sym.total_size, NULL );
else
LstWrite( LSTTYPE_STRUCT, 0, NULL );
}
/* if pass is > 1, update struct stack + CurrStruct.offset and exit */
if ( Parse_Pass > PASS_1 ) {
/* v2.04 changed. the previous implementation was insecure.
* See also change in data.c, behind CreateStructField().
*/
if ( CurrStruct ) {
sym = CurrStruct->e.structinfo->tail->sym.type;
/**/myassert( sym );
CurrStruct->e.structinfo->tail = CurrStruct->e.structinfo->tail->next;
}
/**/myassert( sym );
dir = (struct dsym *)sym;
dir->e.structinfo->tail = dir->e.structinfo->head;
sym->offset = 0;
sym->isdefined = TRUE;
((struct dsym *)sym)->next = CurrStruct;
CurrStruct = (struct dsym *)sym;
return( NOT_ERROR );
}
if( sym == NULL ) {
/* embedded or global STRUCT? */
if ( CurrStruct == NULL )
sym = CreateTypeSymbol( NULL, name, TRUE );
else {
/* an embedded struct is split in an anonymous STRUCT type
* and a struct field with/without name
*/
sym = CreateTypeSymbol( NULL, name, FALSE );
/* v2: don't create the struct field here. First the
* structure must be read in ( because of alignment issues
*/
// sym = CreateStructField( name_loc, -1, MT_TYPE, dir, 0 );
alignment = CurrStruct->e.structinfo->alignment;
}
} else if( sym->state == SYM_UNDEFINED ) {
/* forward reference */
CreateTypeSymbol( sym, NULL, CurrStruct == NULL );
} else if( sym->state == SYM_TYPE && CurrStruct == NULL ) {
switch ( sym->typekind ) {
case TYPE_STRUCT:
case TYPE_UNION:
/* if a struct is redefined as a union ( or vice versa )
* do accept the directive and just check if the redefinition
* is compatible (usually it isn't) */
redef_struct = (struct dsym *)sym;
sym = CreateTypeSymbol( NULL, name, FALSE );
break;
case TYPE_NONE: /* TYPE_NONE is forward reference */
break;
default:
return( EmitErr( SYMBOL_REDEFINITION, sym->name ) );
}
} else {
return( EmitErr( SYMBOL_REDEFINITION, sym->name ) );
}
sym->offset = 0;
sym->typekind = typekind;
dir = (struct dsym *)sym;
dir->e.structinfo->alignment = alignment;
dir->e.structinfo->isOpen = TRUE;
if ( CurrStruct )
dir->e.structinfo->isInline = TRUE;
dir->next = CurrStruct;
CurrStruct = dir;
#if 0 //def DEBUG_OUT
{
struct dsym *struc;
for ( struc = CurrStruct; struc; struc = struc->next ) {
DebugMsg(("StructDirective stack: %X, name=>%s<\n", struc, struc->sym.name ));
}
}
#endif
return( NOT_ERROR );
}
/* handle ENDS directive when a struct/union definition is active */
ret_code EndstructDirective( int i, struct asm_tok tokenarray[] )
/***************************************************************/
{
//char *name;
//unsigned int offset;
unsigned int size;
//struct asym *sym;
//memtype mem_type;
struct dsym *dir;
dir = CurrStruct; /* cannot be NULL */
DebugMsg1(("EndstructDirective(%s), ofs=%" I32_SPEC "u, struct size=%" I32_SPEC "u, max_mbr=%" I32_SPEC "u, alignment=%u\n",
dir->sym.name,
dir->sym.offset,
dir->sym.total_size,
dir->sym.max_mbr_size,
dir->e.structinfo->alignment));
/* if pass is > 1 just do minimal work */
if ( Parse_Pass > PASS_1 ) {
CurrStruct->sym.offset = 0;
size = CurrStruct->sym.total_size;
CurrStruct = CurrStruct->next;
if ( CurrStruct )
UpdateStructSize( (struct asym *)dir );
if ( CurrFile[LST] )
LstWrite( LSTTYPE_STRUCT, size, dir );
return( NOT_ERROR );
}
/* syntax is either "<name> ENDS" (i=1) or "ENDS" (i=0).
* first case must be top level (next=NULL), latter case must NOT be top level (next!=NULL)
*/
if ( ( i == 1 && dir->next == NULL ) ||
( i == 0 && dir->next != NULL ) ) {
;
} else {
/* v2.04: error msg improved */
//EmitErr( SYNTAX_ERROR_EX, tokenarray[i].string_ptr );
return( EmitErr( UNMATCHED_BLOCK_NESTING, i == 1 ? tokenarray[0].string_ptr : "" ) );
}
if ( i == 1 ) { /* an global struct ends with <name ENDS> */
if ( SymCmpFunc( tokenarray[0].string_ptr, dir->sym.name, dir->sym.name_size ) != 0 ) {
/* names don't match */
DebugMsg(("EndstructDirective: names don't match, i=%u, name=%s - %s\n", i, tokenarray[0].string_ptr, dir->sym.name));
return( EmitErr( UNMATCHED_BLOCK_NESTING, tokenarray[0].string_ptr ) );
}
}
i++; /* go past ENDS */
/* v2.07: if ORG was used inside the struct, the struct's size
* has to be calculated now - there may exist negative offsets.
*/
if ( dir->e.structinfo->OrgInside ) {
struct sfield *f;
int_32 min = 0;
for ( f = dir->e.structinfo->head; f; f = f->next )
if ( f->sym.offset < min )
min = f->sym.offset;
dir->sym.total_size = dir->sym.total_size - min;
}
/* Pad bytes at the end of the structure. */
#if 1
/* v2.02: this is to be done in any case, whether -Zg is set or not */
//if ( dir->e.structinfo->alignment > 1 && Options.masm_compat_gencode == FALSE ) {
if ( dir->e.structinfo->alignment > 1 ) {
size = dir->sym.max_mbr_size;
if ( size == 0 )
size++;
if ( size > dir->e.structinfo->alignment )
size = dir->e.structinfo->alignment;
dir->sym.total_size = (dir->sym.total_size + size - 1) & (-size);
DebugMsg1(("EndstructDirective:, struct size after final alignment=%" I32_SPEC "u\n", dir->sym.total_size));
}
#endif
dir->e.structinfo->isOpen = FALSE;
dir->sym.isdefined = TRUE;
/* if there's a negative offset, size will be wrong! */
size = dir->sym.total_size;
/* reset offset, it's just used during the definition */
dir->sym.offset = 0;
CurrStruct = dir->next;
/* v2.0: add the embedded struct AFTER it has been parsed! */
if ( i == 1 ) {
struct asym *sym;
/* v2.06: the struct name is needed for checks */
sym = CreateStructField( -1, NULL, *dir->sym.name ? dir->sym.name : NULL, MT_TYPE, &dir->sym, dir->sym.total_size );
/* the member name was stored in the type name */
//sym->name = dir->sym.name;
//sym->name_size = strlen( dir->sym.name );
sym->total_size = dir->sym.total_size;
dir->sym.name = ""; /* the type becomes anonymous */
dir->sym.name_size = 0;
}
if ( CurrFile[LST] ) {
LstWrite( LSTTYPE_STRUCT, size, dir );
}
#if 1
/* to allow direct structure access */
switch ( dir->sym.total_size ) {
case 1: dir->sym.mem_type = MT_BYTE; break;
case 2: dir->sym.mem_type = MT_WORD; break;
case 4: dir->sym.mem_type = MT_DWORD; break;
case 6: dir->sym.mem_type = MT_FWORD; break;
case 8: dir->sym.mem_type = MT_QWORD; break;
//case 16: dir->sym.mem_type = MT_OWORD; break;
default: dir->sym.mem_type = MT_EMPTY;
}
#endif
/* reset redefine */
if ( CurrStruct == NULL ) {
if ( redef_struct ) {
if ( AreStructsEqual( dir, redef_struct) == FALSE ) {
EmitErr( NON_BENIGN_XXX_REDEFINITION, szStructure, dir->sym.name );
}
DebugMsg(("EndstructDirective: delete the redefinition of %s\n", dir->sym.name ));
SymFree( (struct asym *)dir );
redef_struct = NULL;
}
} else {
if ( dir->sym.max_mbr_size > CurrStruct->sym.max_mbr_size )
CurrStruct->sym.max_mbr_size = dir->sym.max_mbr_size;
UpdateStructSize( (struct asym *)dir );
DebugMsg1(("EndstructDirective: new size of restored structure=%u\n", CurrStruct->sym.total_size));
}
//dir->sym.max_mbr_size = 0;
if ( tokenarray[i].token != T_FINAL ) {
return( EmitErr( SYNTAX_ERROR_EX, tokenarray[i].string_ptr ) );
}
return( NOT_ERROR );
}
/* v2.06: new function to check fields of anonymous struct members */
static ret_code CheckAnonymousStruct( struct dsym *type )
/*******************************************************/
{
uint_32 disp;
struct asym *sym;
struct sfield *f;
for ( f = type->e.structinfo->head; f; f = f->next ) {
if ( *f->sym.name ) {
sym = SearchNameInStruct((struct asym *)CurrStruct, f->sym.name, &disp, 0 );
if ( sym ) {
return( EmitErr( SYMBOL_REDEFINITION, sym->name ) );
}
} else if ( f->sym.type ) {
struct dsym *stype = (struct dsym *)f->sym.type;
if ( stype->sym.typekind == TYPE_STRUCT ||
stype->sym.typekind == TYPE_UNION ) {
if ( CheckAnonymousStruct( stype ) == ERROR )
return( ERROR );
}
}
}
return( NOT_ERROR );
}
/* CreateStructField() - creates a symbol of state SYM_STRUCT_FIELD.
* this function is called in pass 1 only.
* - loc: initializer index location, -1 means no initializer (is an embedded struct)
* - name: field name, may be NULL
* - mem_type: mem_type of item
* - vartype: user-defined type of item if memtype is MT_TYPE
* - size: size of type - used for alignment only
*/
struct asym *CreateStructField( int loc, struct asm_tok tokenarray[], const char *name, enum memtype mem_type, struct asym *vartype, uint_32 size )
/*************************************************************************************************************************************************/
{
int_32 offset;
//int count;
int i;
int len;
uint_32 disp;
char *init;
struct struct_info *si;
struct sfield *f;
struct asym *gsym;
si = CurrStruct->e.structinfo;
offset = CurrStruct->sym.offset;
DebugMsg1(("CreateStructField(%s): name=%s, curr ofs=%" I32_SPEC "u, vartype=%s, size=%" I32_SPEC "u\n",
CurrStruct->sym.name, name ? name : "<anonymous>", offset,
vartype ? vartype->name : "NULL", size ));
if ( name ) {
struct asym *sym;
len = strlen( name );
if( len > MAX_ID_LEN ) {
EmitError( IDENTIFIER_TOO_LONG );
return( NULL );
}
sym = SearchNameInStruct((struct asym *)CurrStruct, name, &disp, 0 );
if ( sym ) {
EmitErr( SYMBOL_ALREADY_DEFINED, sym->name );
return( NULL );
}
} else {
/* v2.06: check fields of anonymous struct member */
if ( vartype &&
( vartype->typekind == TYPE_STRUCT ||
vartype->typekind == TYPE_UNION ) ) {
CheckAnonymousStruct( (struct dsym *)vartype );
}
name = "";
len = 0;
}
if ( loc != -1 ) {
//i = strlen( tokenarray[loc].string_ptr ) + 1;
//DebugMsg1(("CreateStructField(%s): type=>%s<\n", CurrStruct->sym.name, tokenarray[loc].string_ptr ));
//f->init_dir = LclAlloc( i );
//memcpy( f->init_dir, tokenarray[loc].string_ptr, i );
/* now add the value to initialize the struct to */
/* v2.03: the initializer value may contain assembly time
* variables ( $ inside structs is also one ). It's crucial that
* the variable's CURRENT value is used then.
* v2.08: modified. avoid usage of token->string_ptr,
* and prefer to use token->tokpos.
*/
init = StringBufferEnd;
for ( i = loc+1; tokenarray[i].token != T_FINAL; i++ ) {
if ( tokenarray[i].token == T_ID ) {
struct asym *sym2 = SymSearch( tokenarray[i].string_ptr );
if ( sym2 && sym2->variable ) {
if ( sym2->predefined && sym2->sfunc_ptr )
sym2->sfunc_ptr( sym2, NULL );
myltoa( sym2->uvalue, init, ModuleInfo.radix, sym2->value3264 < 0, TRUE );
init += strlen( init );
*init++= ' ';
continue;
}
}
memcpy( init, tokenarray[i].tokpos, tokenarray[i+1].tokpos - tokenarray[i].tokpos );
init += tokenarray[i+1].tokpos - tokenarray[i].tokpos;
}
*init = NULLC;
f = LclAlloc( sizeof( struct sfield ) + ( init - StringBufferEnd ) );
//f->value = LclAlloc( init - StringBufferEnd + 1 );
memset( f, 0, sizeof( struct sfield ) );
strcpy( f->ivalue, StringBufferEnd );
DebugMsg1(("CreateStructField(%s): initializer=>%s<\n", CurrStruct->sym.name, f->ivalue ));
} else {
f = LclAlloc( sizeof( struct sfield ) );
memset( f, 0, sizeof( struct sfield ) );
DebugMsg1(("CreateStructField(%s): no initializer<\n", CurrStruct->sym.name ));
//f->init_dir = NULL;
f->ivalue[0] = NULLC;
}
/* create the struct field symbol */
//sym = SymAlloc( name );
f->sym.name_size = len;
if ( len ) {
f->sym.name = LclAlloc( len + 1 );
memcpy( f->sym.name, name, len );
f->sym.name[len] = NULLC;
} else
f->sym.name = "";
f->sym.state = SYM_STRUCT_FIELD;
f->sym.list = ModuleInfo.cref;
f->sym.isdefined = TRUE;
f->sym.mem_type = mem_type;
f->sym.type = vartype;
/* fields total/first_size, total/first_length are set in data_item() */
// sym->total_size = SizeFromMemtype( mem_type, ModuleInfo.Ofssize );
f->next = NULL;
//f->sym = sym;
if( si->head == NULL ) {
si->head = si->tail = f;
} else {
si->tail->next = f;
si->tail = f;
}
#if 1
/* v2.0: for STRUCTs, don't use the struct's size for alignment calculations,
* instead use the size of the "max" member!
*/
if ( mem_type == MT_TYPE &&
( vartype->typekind == TYPE_STRUCT ||
vartype->typekind == TYPE_UNION ) ) {
size = vartype->max_mbr_size;
}
#endif
/* align the field if an alignment argument was given */
if ( si->alignment > 1 ) {
//enum memtype mt;
//struct dsym *tdir;
DebugMsg1(("CreateStructField(%s): align=%u, size=%u, ofs=%u\n", CurrStruct->sym.name, si->alignment, size, offset ));
/* if it's the first field to add, use offset of the parent's current field */
#if 0
/* v2: removed. An embedded struct is now added AFTER it has
* been parsed. */
if ( offset == 0 && CurrStruct->next ) {
struct dsym *parent = CurrStruct->next;
if ( si->alignment < size )
parent->e.structinfo->tail->sym->offset =
(parent->e.structinfo->tail->sym->offset + (si->alignment - 1)) & ( - si->alignment);
else if ( size )
parent->e.structinfo->tail->sym->offset =
(parent->e.structinfo->tail->sym->offset + (size - 1)) & (-size);
} else
#endif
{
if ( si->alignment < size )
offset = (offset + (si->alignment - 1)) & ( - si->alignment);
else if ( size )
offset = (offset + (size - 1)) & (-size);
}
/* adjust the struct's current offset + size.
The field's size is added in UpdateStructSize()
*/
if ( CurrStruct->sym.typekind != TYPE_UNION ) {
CurrStruct->sym.offset = offset;
if ( offset > CurrStruct->sym.total_size )
CurrStruct->sym.total_size = offset;
}
}
/* v2.0: for padding, save the max member size */
if ( size > CurrStruct->sym.max_mbr_size ) {
DebugMsg1(("CreateStructField(%s): max_mbr_size set to %u\n", CurrStruct->sym.name, size ));
CurrStruct->sym.max_mbr_size = size;
}
f->sym.offset = offset;
/* if -Zm is on, create a global symbol */
if ( ModuleInfo.oldstructs == TRUE && *name != NULLC ) {
DebugMsg(("CreateStructField(%s): Masm51 compat on, lookup %s in global symbol table\n", CurrStruct->sym.name, name ));
gsym = SymLookup( name );
/* v2.11: cannot fail */
//if ( gsym ) {
if ( gsym->state == SYM_UNDEFINED )
gsym->state = SYM_STRUCT_FIELD;
if ( gsym->state == SYM_STRUCT_FIELD ) {
struct dsym *dir;
gsym->mem_type = mem_type;
gsym->type = vartype;
gsym->offset = offset; /* added v2.0 */
/* v2.01: must be the full offset.
* (there's still a problem if alignment is > 1!)
*/
for ( dir = CurrStruct->next; dir; dir = dir->next )
gsym->offset += dir->sym.offset;
gsym->isdefined = TRUE;
}
//}
}
return( &f->sym );
}
/* called by AlignDirective() if ALIGN/EVEN has been found inside
* a struct. It's already verified that <value> is a power of 2.
*/
ret_code AlignInStruct( int value )
/*********************************/
{
if ( CurrStruct->sym.typekind != TYPE_UNION ) {
int offset;
offset = CurrStruct->sym.offset;
offset = (offset + (value - 1)) & (-value);
CurrStruct->sym.offset = offset;
if ( offset > CurrStruct->sym.total_size )
CurrStruct->sym.total_size = offset;
}
return( NOT_ERROR );
}
/* called by data_dir() when a structure field has been created.
*/
void UpdateStructSize( struct asym *sym )
/***************************************/
{
if ( CurrStruct->sym.typekind == TYPE_UNION ) {
//if ( no_of_bytes > CurrStruct->sym.total_size )
// CurrStruct->sym.total_size = no_of_bytes;
if ( sym->total_size > CurrStruct->sym.total_size )
CurrStruct->sym.total_size = sym->total_size;
} else {
CurrStruct->sym.offset += sym->total_size;
if ( CurrStruct->sym.offset > (int_32)CurrStruct->sym.total_size )
CurrStruct->sym.total_size = CurrStruct->sym.offset;
}
DebugMsg1(("UpdateStructSize(%s.%s): %s, curr mbr size=%u curr struc/union size=%u\n",
CurrStruct->sym.name,
sym->name,
CurrStruct->sym.typekind == TYPE_UNION ? "union" : "struct",
sym->total_size,
CurrStruct->sym.total_size));
return;
}
/* called if ORG occurs inside STRUCT/UNION definition */
ret_code SetStructCurrentOffset( int_32 offset )
/**********************************************/
{
if ( CurrStruct->sym.typekind == TYPE_UNION ) {
return( EmitError( ORG_NOT_ALLOWED_IN_UNIONS ) );
}
CurrStruct->sym.offset = offset;
/* if an ORG is inside the struct, it cannot be instanced anymore */
CurrStruct->e.structinfo->OrgInside = TRUE;
if ( offset > (int_32)CurrStruct->sym.total_size )
CurrStruct->sym.total_size = offset;
return( NOT_ERROR );
}
/* get a qualified type.
* Used by
* - TYPEDEF
* - PROC/PROTO params and LOCALs
* - EXTERNDEF
* - EXTERN
* - LABEL
* - ASSUME for GPRs
*/
ret_code GetQualifiedType( int *pi, struct asm_tok tokenarray[], struct qualified_type *pti )
/*******************************************************************************************/
{
int type;
int tmp;
enum memtype mem_type;
int i = *pi;
int distance = FALSE;
struct asym *sym;
/* convert PROC token to a type qualifier */
for ( tmp = i; tokenarray[tmp].token != T_FINAL && tokenarray[tmp].token != T_COMMA; tmp++ )
if ( tokenarray[tmp].token == T_DIRECTIVE && tokenarray[tmp].tokval == T_PROC ) {
tokenarray[tmp].token = T_STYPE;
/* v2.06: avoid to use ST_PROC */
tokenarray[tmp].tokval = ( ( SIZE_CODEPTR & ( 1 << ModuleInfo.model ) ) ? T_FAR : T_NEAR );
}
/* with NEAR/FAR, there are several syntax variants allowed:
* 1. NEARxx | FARxx
* 2. PTR NEARxx | FARxx
* 3. NEARxx | FARxx PTR [<type>]
*/
/* read qualified type */
for ( type = ERROR; tokenarray[i].token == T_STYPE || tokenarray[i].token == T_BINARY_OPERATOR; i++ ) {
if ( tokenarray[i].token == T_STYPE ) {
tmp = tokenarray[i].tokval;
if ( type == ERROR )
type = tmp;
mem_type = GetMemtypeSp( tmp );
if ( mem_type == MT_FAR || mem_type == MT_NEAR ) {
if ( distance == FALSE ) {
uint_8 Ofssize = GetSflagsSp( tmp );
pti->is_far = ( mem_type == MT_FAR );
if ( Ofssize != USE_EMPTY )
pti->Ofssize = Ofssize;
distance = TRUE;
} else if ( tokenarray[i-1].tokval != T_PTR )
break;
} else {
if ( pti->is_ptr )
pti->ptr_memtype = mem_type;
i++;
break;
}
} else if ( tokenarray[i].tokval == T_PTR ) {
/* v2.06: avoid to use ST_PTR */
//type = ST_PTR;
type = EMPTY;
pti->is_ptr++;
} else
break;
}
/* v2.06: don't use ST_PTR anymore! */
//if ( type == ST_PTR ) {
if ( type == EMPTY ) {
if ( tokenarray[i].token == T_ID && tokenarray[i-1].tokval == T_PTR ) {
pti->symtype = SymSearch( tokenarray[i].string_ptr );
if ( pti->symtype == NULL || pti->symtype->state == SYM_UNDEFINED )
pti->symtype = CreateTypeSymbol( pti->symtype, tokenarray[i].string_ptr, TRUE );
else if ( pti->symtype->state != SYM_TYPE ) {
return( EmitErr( INVALID_QUALIFIED_TYPE, tokenarray[i].string_ptr ) );
} else {
sym = pti->symtype;
/* if it's a typedef, simplify the info */
if ( sym->typekind == TYPE_TYPEDEF ) {
pti->is_ptr += sym->is_ptr;
if ( sym->is_ptr == 0 ) {
/* v2.06b: alias types have MT_TYPE, dont use for ptr_memtype! */
//pti->ptr_memtype = sym->mem_type;
pti->ptr_memtype = ( sym->mem_type != MT_TYPE ? sym->mem_type : MT_EMPTY );
if ( distance == FALSE && pti->is_ptr == 1 &&
( sym->mem_type == MT_NEAR ||
sym->mem_type == MT_PROC ||
sym->mem_type == MT_FAR ) )
pti->is_far = sym->isfar;
if ( sym->Ofssize != USE_EMPTY )
pti->Ofssize = sym->Ofssize;
} else {
pti->ptr_memtype = sym->ptr_memtype;
if ( distance == FALSE && pti->is_ptr == 1 ) {
pti->is_far = sym->isfar;
if ( sym->Ofssize != USE_EMPTY )
pti->Ofssize = sym->Ofssize;
}
}
if ( sym->mem_type == MT_TYPE )
pti->symtype = sym->type;
else {
DebugMsg1(("GetQualifiedType: memtype=%X, symtype set by target_type\n", sym->mem_type ));
pti->symtype = sym->target_type;
}
}
}
i++;
}
}
if( type == ERROR ) {
if ( tokenarray[i].token != T_ID ) {
if ( tokenarray[i].token == T_FINAL || tokenarray[i].token == T_COMMA )
EmitError( QUALIFIED_TYPE_EXPECTED );
else {
EmitErr( SYNTAX_ERROR_EX, tokenarray[i].string_ptr );
i++;
}
return( ERROR );
}
pti->symtype = SymSearch( tokenarray[i].string_ptr );
if( pti->symtype == NULL || pti->symtype->state != SYM_TYPE ) {
DebugMsg(("GetQualifiedType: invalid type : %s\n", tokenarray[i].string_ptr ));
if ( pti->symtype == NULL || pti->symtype ->state == SYM_UNDEFINED )
EmitErr( SYMBOL_NOT_DEFINED, tokenarray[i].string_ptr );
else
EmitErr( INVALID_QUALIFIED_TYPE, tokenarray[i].string_ptr );
return( ERROR );
}
sym = pti->symtype;
if ( sym->typekind == TYPE_TYPEDEF ) {
pti->mem_type = sym->mem_type;
pti->is_far = sym->isfar;
pti->is_ptr = sym->is_ptr;
pti->Ofssize = sym->Ofssize;
pti->size = sym->total_size;
pti->ptr_memtype = sym->ptr_memtype;
if ( sym->mem_type == MT_TYPE )
pti->symtype = sym->type;
else {
DebugMsg1(("GetQualifiedType: memtype=%X, symtype set by target_type\n", sym->mem_type ));
pti->symtype = sym->target_type;
}
} else {
pti->mem_type = MT_TYPE;
pti->size = sym->total_size;
}
i++;
} else {
if ( pti->is_ptr )
pti->mem_type = MT_PTR;
else
pti->mem_type = GetMemtypeSp( type );
if ( pti->mem_type == MT_PTR )
pti->size = SizeFromMemtype( pti->is_far ? MT_FAR : MT_NEAR, pti->Ofssize, NULL );
else
pti->size = SizeFromMemtype( pti->mem_type, pti->Ofssize, NULL );
}
*pi = i;
DebugMsg1(("GetQualifiedType: i=%u, memtype=%Xh, ptr=%u, far=%u, ofssize=%d, arbtype=%s:%X\n",
i, pti->mem_type, pti->is_ptr, pti->is_far, pti->Ofssize,
pti->symtype ? pti->symtype->name : "NULL",
pti->symtype ? pti->symtype->mem_type : 0 ));
return( NOT_ERROR );
}
/* TYPEDEF directive. Syntax is:
* <type name> TYPEDEF [proto|[far|near [ptr]]<qualified type>]
*/
ret_code TypedefDirective( int i, struct asm_tok tokenarray[] )
/*************************************************************/
{
struct asym *sym;
char *name;
struct qualified_type ti;
DebugMsg1(("TypedefDirective(%d) enter\n", i));
if( i != 1 ) {
return( EmitErr( SYNTAX_ERROR_EX, tokenarray[i].string_ptr ) );
}
name = tokenarray[0].string_ptr;
i++; /* go past TYPEDEF */
sym = SymSearch( name );
if ( sym == NULL || sym->state == SYM_UNDEFINED ) {
sym = CreateTypeSymbol( sym, name, TRUE );
if ( sym == NULL )
return( ERROR );
#if TYPEOPT
/* release the structinfo data extension */
LclFree( ((struct dsym *)sym)->e.structinfo );
((struct dsym *)sym)->e.structinfo = NULL;
#endif
} else {
/* MASM allows to have the TYPEDEF included multiple times */
/* but the types must be identical! */
if ( ( sym->state != SYM_TYPE ) ||
( sym->typekind != TYPE_TYPEDEF &&
sym->typekind != TYPE_NONE ) ) {
return( EmitErr( SYMBOL_REDEFINITION, sym->name ) );
}
}
sym->isdefined = TRUE;
if ( Parse_Pass > PASS_1 )
return( NOT_ERROR );