This is objc-gnu2next.m in view mode; [Download] [Up]
/* Implementation to allow compilation of GNU objc code with NeXT runtime
Copyright (C) 1993,1994 Free Software Foundation, Inc.
Author: Kresten Krab Thorup
Modified by: R. Andrew McCallum <mccallum@gnu.ai.mit.edu>
Date: Sep 1994
This file is part of the GNU Objective C Class Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <objects/stdobjects.h>
#if NeXT_runtime
/* Deal with strrchr: */
#if STDC_HEADERS || HAVE_STRING_H
#include <string.h>
/* An ANSI string.h and pre-ANSI memory.h might conflict. */
#if !STDC_HEADERS && HAVE_MEMORY_H
#include <memory.h>
#endif /* not STDC_HEADERS and HAVE_MEMORY_H */
#define index strchr
#define rindex strrchr
#define bcopy(s, d, n) memcpy ((d), (s), (n))
#define bcmp(s1, s2, n) memcmp ((s1), (s2), (n))
#define bzero(s, n) memset ((s), 0, (n))
#else /* not STDC_HEADERS and not HAVE_STRING_H */
#include <strings.h>
/* memory.h and strings.h conflict on some systems. */
#endif /* not STDC_HEADERS and not HAVE_STRING_H */
#define ROUND(V, A) \
({ typeof(V) __v=(V); typeof(A) __a=(A); \
__a*((__v+__a-1)/__a); })
static inline int
atoi (const char* str)
{
int res = 0;
while (isdigit (*str))
res *= 10, res += (*str++ - '0');
return res;
}
/*
return the size of an object specified by type
*/
int
objc_sizeof_type(const char* type)
{
switch(*type) {
case _C_ID:
return sizeof(id);
break;
case _C_CLASS:
return sizeof(Class*);
break;
case _C_SEL:
return sizeof(SEL);
break;
case _C_CHR:
return sizeof(char);
break;
case _C_UCHR:
return sizeof(unsigned char);
break;
case _C_SHT:
return sizeof(short);
break;
case _C_USHT:
return sizeof(unsigned short);
break;
case _C_INT:
return sizeof(int);
break;
case _C_UINT:
return sizeof(unsigned int);
break;
case _C_LNG:
return sizeof(long);
break;
case _C_ULNG:
return sizeof(unsigned long);
break;
case _C_FLT:
return sizeof(float);
break;
case _C_DBL:
return sizeof(double);
break;
case _C_PTR:
case _C_ATOM:
case _C_CHARPTR:
return sizeof(char*);
break;
case _C_ARY_B:
{
int len = atoi(type+1);
while (isdigit(*++type));
return len*objc_aligned_size (type);
}
break;
case _C_STRUCT_B:
{
int acc_size = 0;
int align;
while (*type != _C_STRUCT_E && *type++ != '='); /* skip "<name>=" */
while (*type != _C_STRUCT_E)
{
align = objc_alignof_type (type); /* padd to alignment */
acc_size = ROUND (acc_size, align);
acc_size += objc_sizeof_type (type); /* add component size */
type = objc_skip_typespec (type); /* skip component */
}
return acc_size;
}
case _C_UNION_B:
{
int max_size = 0;
while (*type != _C_UNION_E && *type++ != '=') /* do nothing */;
while (*type != _C_UNION_E)
{
max_size = MAX (max_size, objc_sizeof_type (type));
type = objc_skip_typespec (type);
}
return max_size;
}
default:
abort();
}
}
/*
Return the alignment of an object specified by type
*/
int
objc_alignof_type(const char* type)
{
switch(*type) {
case _C_ID:
return __alignof__(id);
break;
case _C_CLASS:
return __alignof__(Class*);
break;
case _C_SEL:
return __alignof__(SEL);
break;
case _C_CHR:
return __alignof__(char);
break;
case _C_UCHR:
return __alignof__(unsigned char);
break;
case _C_SHT:
return __alignof__(short);
break;
case _C_USHT:
return __alignof__(unsigned short);
break;
case _C_INT:
return __alignof__(int);
break;
case _C_UINT:
return __alignof__(unsigned int);
break;
case _C_LNG:
return __alignof__(long);
break;
case _C_ULNG:
return __alignof__(unsigned long);
break;
case _C_FLT:
return __alignof__(float);
break;
case _C_DBL:
return __alignof__(double);
break;
case _C_ATOM:
case _C_CHARPTR:
return __alignof__(char*);
break;
case _C_ARY_B:
while (isdigit(*++type)) /* do nothing */;
return objc_alignof_type (type);
case _C_STRUCT_B:
{
struct { int x; double y; } fooalign;
while(*type != _C_STRUCT_E && *type++ != '=') /* do nothing */;
if (*type != _C_STRUCT_E)
return MAX (objc_alignof_type (type), __alignof__ (fooalign));
else
return __alignof__ (fooalign);
}
case _C_UNION_B:
{
int maxalign = 0;
while (*type != _C_UNION_E && *type++ != '=') /* do nothing */;
while (*type != _C_UNION_E)
{
maxalign = MAX (maxalign, objc_alignof_type (type));
type = objc_skip_typespec (type);
}
return maxalign;
}
default:
abort();
}
}
/*
The aligned size if the size rounded up to the nearest alignment.
*/
int
objc_aligned_size (const char* type)
{
int size = objc_sizeof_type (type);
int align = objc_alignof_type (type);
return ROUND (size, align);
}
/*
The size rounded up to the nearest integral of the wordsize, taken
to be the size of a void*.
*/
int
objc_promoted_size (const char* type)
{
int size = objc_sizeof_type (type);
int wordsize = sizeof (void*);
return ROUND (size, wordsize);
}
/*
Skip type qualifiers. These may eventually precede typespecs
occuring in method prototype encodings.
*/
inline const char*
objc_skip_type_qualifiers (const char* type)
{
while (*type == _C_CONST
|| *type == _C_IN
|| *type == _C_INOUT
|| *type == _C_OUT
|| *type == _C_BYCOPY
|| *type == _C_ONEWAY)
{
type += 1;
}
return type;
}
/*
Skip one typespec element. If the typespec is prepended by type
qualifiers, these are skipped as well.
*/
const char*
objc_skip_typespec (const char* type)
{
type = objc_skip_type_qualifiers (type);
switch (*type) {
case _C_ID:
/* An id may be annotated by the actual type if it is known
with the @"ClassName" syntax */
if (*++type != '"')
return type;
else
{
while (*++type != '"') /* do nothing */;
return type + 1;
}
/* The following are one character type codes */
case _C_CLASS:
case _C_SEL:
case _C_CHR:
case _C_UCHR:
case _C_CHARPTR:
case _C_ATOM:
case _C_SHT:
case _C_USHT:
case _C_INT:
case _C_UINT:
case _C_LNG:
case _C_ULNG:
case _C_FLT:
case _C_DBL:
case _C_VOID:
return ++type;
break;
case _C_ARY_B:
/* skip digits, typespec and closing ']' */
while(isdigit(*++type));
type = objc_skip_typespec(type);
if (*type == _C_ARY_E)
return ++type;
else
abort();
case _C_STRUCT_B:
/* skip name, and elements until closing '}' */
while (*type != _C_STRUCT_E && *type++ != '=');
while (*type != _C_STRUCT_E) { type = objc_skip_typespec (type); }
return ++type;
case _C_UNION_B:
/* skip name, and elements until closing ')' */
while (*type != _C_UNION_E && *type++ != '=');
while (*type != _C_UNION_E) { type = objc_skip_typespec (type); }
return ++type;
case _C_PTR:
/* Just skip the following typespec */
return objc_skip_typespec (++type);
default:
abort();
}
}
/*
Skip an offset as part of a method encoding. This is prepended by a
'+' if the argument is passed in registers.
*/
inline const char*
objc_skip_offset (const char* type)
{
if (*type == '+') type++;
while(isdigit(*++type));
return type;
}
/*
Skip an argument specification of a method encoding.
*/
const char*
objc_skip_argspec (const char* type)
{
type = objc_skip_typespec (type);
type = objc_skip_offset (type);
return type;
}
unsigned
objc_get_type_qualifiers (const char* type)
{
unsigned res = 0;
BOOL flag = YES;
while (flag)
switch (*type++)
{
case _C_CONST: res |= _F_CONST; break;
case _C_IN: res |= _F_IN; break;
case _C_INOUT: res |= _F_INOUT; break;
case _C_OUT: res |= _F_OUT; break;
case _C_BYCOPY: res |= _F_BYCOPY; break;
case _C_ONEWAY: res |= _F_ONEWAY; break;
default: flag = NO;
}
return res;
}
/* GNU Object.[hm] defines -compare:, NeXT doesn't, libcoll needs it. */
@implementation Object (GNUExtensions)
- (int)compare:anotherObject;
{
if ([self isEqual:anotherObject])
return 0;
// Ordering objects by their address is pretty useless,
// so subclasses should override this is some useful way.
else if (self > anotherObject)
return 1;
else
return -1;
}
- shouldNotImplement:(SEL)op
{
return [self error:"should not implement %s", sel_getName (op)];
}
@end
#ifdef objc_fatal
#undef objc_fatal
#endif
volatile void
objc_fatal(const char* msg)
{
write(2, msg, (int)strlen((const char*)msg));
abort();
}
void *__objc_xmalloc (unsigned long size)
{
void* res = (void*) malloc(size);
if(!res)
objc_fatal("Virtual memory exhausted\n");
return res;
}
void*
__objc_xrealloc(void* mem, size_t size)
{
void* res = (void*) realloc(mem, size);
if(!res)
objc_fatal("Virtual memory exhausted\n");
return res;
}
void*
__objc_xcalloc(size_t nelem, size_t size)
{
void* res = (void*)calloc(nelem, size);
if(!res)
objc_fatal("Virtual memory exhausted\n");
return res;
}
/* Returns YES iff t1 and t2 have same method types, but we ignore
the argframe layout */
BOOL
sel_types_match (const char* t1, const char* t2)
{
if (!t1 || !t2)
return NO;
while (*t1 && *t2)
{
if (*t1 == '+') t1++;
if (*t2 == '+') t2++;
while (isdigit(*t1)) t1++;
while (isdigit(*t2)) t2++;
/* xxx Remove these next two lines when qualifiers are put in
all selectors, not just Protocol selectors. */
t1 = objc_skip_type_qualifiers(t1);
t2 = objc_skip_type_qualifiers(t2);
if (!*t1 && !*t2)
return YES;
if (*t1 != *t2)
return NO;
t1++;
t2++;
}
return NO;
}
#endif /* NeXT_runtime */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.