+++ /dev/null
-/* GNU Objective C Runtime archiving
- Copyright (C) 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
- Contributed by Kresten Krab Thorup
-
-This file is part of GNU CC.
-
-GNU CC is free software; you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation; either version 2, or (at your option) any later version.
-
-GNU CC 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 General Public License for more
-details.
-
-You should have received a copy of the GNU General Public License along with
-GNU CC; see the file COPYING. If not, write to the Free Software
-Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* As a special exception, if you link this library with files compiled with
- GCC to produce an executable, this does not cause the resulting executable
- to be covered by the GNU General Public License. This exception does not
- however invalidate any other reasons why the executable file might be
- covered by the GNU General Public License. */
-
-#include "tconfig.h"
-#include "runtime.h"
-#include "typedstream.h"
-#include "encoding.h"
-
-#ifdef HAVE_STDLIB_H
-#include <stdlib.h>
-#endif
-
-extern int fflush(FILE*);
-
-#define ROUND(V, A) \
- ({ typeof(V) __v=(V); typeof(A) __a=(A); \
- __a*((__v+__a-1)/__a); })
-
-#define PTR2LONG(P) (((char*)(P))-(char*)0)
-#define LONG2PTR(L) (((char*)0)+(L))
-
-/* Declare some functions... */
-
-static int
-objc_read_class (struct objc_typed_stream* stream, Class* class);
-
-int objc_sizeof_type(const char* type);
-
-static int
-objc_write_use_common (struct objc_typed_stream* stream, unsigned long key);
-
-static int
-objc_write_register_common (struct objc_typed_stream* stream,
- unsigned long key);
-
-static int
-objc_write_class (struct objc_typed_stream* stream,
- struct objc_class* class);
-
-const char* objc_skip_type (const char* type);
-
-static void __objc_finish_write_root_object(struct objc_typed_stream*);
-static void __objc_finish_read_root_object(struct objc_typed_stream*);
-
-static __inline__ int
-__objc_code_unsigned_char (unsigned char* buf, unsigned char val)
-{
- if ((val&_B_VALUE) == val)
- {
- buf[0] = val|_B_SINT;
- return 1;
- }
- else
- {
- buf[0] = _B_NINT|0x01;
- buf[1] = val;
- return 2;
- }
-}
-
-int
-objc_write_unsigned_char (struct objc_typed_stream* stream,
- unsigned char value)
-{
- unsigned char buf[sizeof (unsigned char)+1];
- int len = __objc_code_unsigned_char (buf, value);
- return (*stream->write)(stream->physical, buf, len);
-}
-
-static __inline__ int
-__objc_code_char (unsigned char* buf, signed char val)
-{
- if (val >= 0)
- return __objc_code_unsigned_char (buf, val);
- else
- {
- buf[0] = _B_NINT|_B_SIGN|0x01;
- buf[1] = -val;
- return 2;
- }
-}
-
-int
-objc_write_char (struct objc_typed_stream* stream, signed char value)
-{
- unsigned char buf[sizeof (char)+1];
- int len = __objc_code_char (buf, value);
- return (*stream->write)(stream->physical, buf, len);
-}
-
-static __inline__ int
-__objc_code_unsigned_short (unsigned char* buf, unsigned short val)
-{
- if ((val&_B_VALUE) == val)
- {
- buf[0] = val|_B_SINT;
- return 1;
- }
- else
- {
- int c, b;
-
- buf[0] = _B_NINT;
-
- for (c= sizeof(short); c != 0; c -= 1)
- if (((val>>(8*(c-1)))%0x100) != 0)
- break;
-
- buf[0] |= c;
-
- for (b = 1; c != 0; c--, b++)
- {
- buf[b] = (val >> (8*(c-1)))%0x100;
- }
-
- return b;
- }
-}
-
-int
-objc_write_unsigned_short (struct objc_typed_stream* stream,
- unsigned short value)
-{
- unsigned char buf[sizeof (unsigned short)+1];
- int len = __objc_code_unsigned_short (buf, value);
- return (*stream->write)(stream->physical, buf, len);
-}
-
-static __inline__ int
-__objc_code_short (unsigned char* buf, short val)
-{
- int sign = (val < 0);
- int size = __objc_code_unsigned_short (buf, sign ? -val : val);
- if (sign)
- buf[0] |= _B_SIGN;
- return size;
-}
-
-int
-objc_write_short (struct objc_typed_stream* stream, short value)
-{
- unsigned char buf[sizeof (short)+1];
- int len = __objc_code_short (buf, value);
- return (*stream->write)(stream->physical, buf, len);
-}
-
-
-static __inline__ int
-__objc_code_unsigned_int (unsigned char* buf, unsigned int val)
-{
- if ((val&_B_VALUE) == val)
- {
- buf[0] = val|_B_SINT;
- return 1;
- }
- else
- {
- int c, b;
-
- buf[0] = _B_NINT;
-
- for (c= sizeof(int); c != 0; c -= 1)
- if (((val>>(8*(c-1)))%0x100) != 0)
- break;
-
- buf[0] |= c;
-
- for (b = 1; c != 0; c--, b++)
- {
- buf[b] = (val >> (8*(c-1)))%0x100;
- }
-
- return b;
- }
-}
-
-int
-objc_write_unsigned_int (struct objc_typed_stream* stream, unsigned int value)
-{
- unsigned char buf[sizeof(unsigned int)+1];
- int len = __objc_code_unsigned_int (buf, value);
- return (*stream->write)(stream->physical, buf, len);
-}
-
-static __inline__ int
-__objc_code_int (unsigned char* buf, int val)
-{
- int sign = (val < 0);
- int size = __objc_code_unsigned_int (buf, sign ? -val : val);
- if (sign)
- buf[0] |= _B_SIGN;
- return size;
-}
-
-int
-objc_write_int (struct objc_typed_stream* stream, int value)
-{
- unsigned char buf[sizeof(int)+1];
- int len = __objc_code_int (buf, value);
- return (*stream->write)(stream->physical, buf, len);
-}
-
-static __inline__ int
-__objc_code_unsigned_long (unsigned char* buf, unsigned long val)
-{
- if ((val&_B_VALUE) == val)
- {
- buf[0] = val|_B_SINT;
- return 1;
- }
- else
- {
- int c, b;
-
- buf[0] = _B_NINT;
-
- for (c= sizeof(long); c != 0; c -= 1)
- if (((val>>(8*(c-1)))%0x100) != 0)
- break;
-
- buf[0] |= c;
-
- for (b = 1; c != 0; c--, b++)
- {
- buf[b] = (val >> (8*(c-1)))%0x100;
- }
-
- return b;
- }
-}
-
-int
-objc_write_unsigned_long (struct objc_typed_stream* stream,
- unsigned long value)
-{
- unsigned char buf[sizeof(unsigned long)+1];
- int len = __objc_code_unsigned_long (buf, value);
- return (*stream->write)(stream->physical, buf, len);
-}
-
-static __inline__ int
-__objc_code_long (unsigned char* buf, long val)
-{
- int sign = (val < 0);
- int size = __objc_code_unsigned_long (buf, sign ? -val : val);
- if (sign)
- buf[0] |= _B_SIGN;
- return size;
-}
-
-int
-objc_write_long (struct objc_typed_stream* stream, long value)
-{
- unsigned char buf[sizeof(long)+1];
- int len = __objc_code_long (buf, value);
- return (*stream->write)(stream->physical, buf, len);
-}
-
-
-int
-objc_write_string (struct objc_typed_stream* stream,
- const unsigned char* string, unsigned int nbytes)
-{
- unsigned char buf[sizeof(unsigned int)+1];
- int len = __objc_code_unsigned_int (buf, nbytes);
-
- if ((buf[0]&_B_CODE) == _B_SINT)
- buf[0] = (buf[0]&_B_VALUE)|_B_SSTR;
-
- else /* _B_NINT */
- buf[0] = (buf[0]&_B_VALUE)|_B_NSTR;
-
- if ((*stream->write)(stream->physical, buf, len) != 0)
- return (*stream->write)(stream->physical, string, nbytes);
- else
- return 0;
-}
-
-int
-objc_write_string_atomic (struct objc_typed_stream* stream,
- unsigned char* string, unsigned int nbytes)
-{
- unsigned long key;
- if ((key = PTR2LONG(hash_value_for_key (stream->stream_table, string))))
- return objc_write_use_common (stream, key);
- else
- {
- int length;
- hash_add (&stream->stream_table, LONG2PTR(key=PTR2LONG(string)), string);
- if ((length = objc_write_register_common (stream, key)))
- return objc_write_string (stream, string, nbytes);
- return length;
- }
-}
-
-static int
-objc_write_register_common (struct objc_typed_stream* stream,
- unsigned long key)
-{
- unsigned char buf[sizeof (unsigned long)+2];
- int len = __objc_code_unsigned_long (buf+1, key);
- if (len == 1)
- {
- buf[0] = _B_RCOMM|0x01;
- buf[1] &= _B_VALUE;
- return (*stream->write)(stream->physical, buf, len+1);
- }
- else
- {
- buf[1] = (buf[1]&_B_VALUE)|_B_RCOMM;
- return (*stream->write)(stream->physical, buf+1, len);
- }
-}
-
-static int
-objc_write_use_common (struct objc_typed_stream* stream, unsigned long key)
-{
- unsigned char buf[sizeof (unsigned long)+2];
- int len = __objc_code_unsigned_long (buf+1, key);
- if (len == 1)
- {
- buf[0] = _B_UCOMM|0x01;
- buf[1] &= _B_VALUE;
- return (*stream->write)(stream->physical, buf, 2);
- }
- else
- {
- buf[1] = (buf[1]&_B_VALUE)|_B_UCOMM;
- return (*stream->write)(stream->physical, buf+1, len);
- }
-}
-
-static __inline__ int
-__objc_write_extension (struct objc_typed_stream* stream, unsigned char code)
-{
- if (code <= _B_VALUE)
- {
- unsigned char buf = code|_B_EXT;
- return (*stream->write)(stream->physical, &buf, 1);
- }
- else
- {
- objc_error(nil, OBJC_ERR_BAD_OPCODE,
- "__objc_write_extension: bad opcode %c\n", code);
- return -1;
- }
-}
-
-__inline__ int
-__objc_write_object (struct objc_typed_stream* stream, id object)
-{
- unsigned char buf = '\0';
- SEL write_sel = sel_get_any_uid ("write:");
- if (object)
- {
- __objc_write_extension (stream, _BX_OBJECT);
- objc_write_class (stream, object->class_pointer);
- (*objc_msg_lookup(object, write_sel))(object, write_sel, stream);
- return (*stream->write)(stream->physical, &buf, 1);
- }
- else
- return objc_write_use_common(stream, 0);
-}
-
-int
-objc_write_object_reference (struct objc_typed_stream* stream, id object)
-{
- unsigned long key;
- if ((key = PTR2LONG(hash_value_for_key (stream->object_table, object))))
- return objc_write_use_common (stream, key);
-
- __objc_write_extension (stream, _BX_OBJREF);
- return objc_write_unsigned_long (stream, PTR2LONG (object));
-}
-
-int
-objc_write_root_object (struct objc_typed_stream* stream, id object)
-{
- int len = 0;
- if (stream->writing_root_p)
- objc_error (nil, OBJC_ERR_RECURSE_ROOT,
- "objc_write_root_object called recursively");
- else
- {
- stream->writing_root_p = 1;
- __objc_write_extension (stream, _BX_OBJROOT);
- if((len = objc_write_object (stream, object)))
- __objc_finish_write_root_object(stream);
- stream->writing_root_p = 0;
- }
- return len;
-}
-
-int
-objc_write_object (struct objc_typed_stream* stream, id object)
-{
- unsigned long key;
- if ((key = PTR2LONG(hash_value_for_key (stream->object_table, object))))
- return objc_write_use_common (stream, key);
-
- else if (object == nil)
- return objc_write_use_common(stream, 0);
-
- else
- {
- int length;
- hash_add (&stream->object_table, LONG2PTR(key=PTR2LONG(object)), object);
- if ((length = objc_write_register_common (stream, key)))
- return __objc_write_object (stream, object);
- return length;
- }
-}
-
-__inline__ int
-__objc_write_class (struct objc_typed_stream* stream, struct objc_class* class)
-{
- __objc_write_extension (stream, _BX_CLASS);
- objc_write_string_atomic(stream, (char*)class->name,
- strlen((char*)class->name));
- return objc_write_unsigned_long (stream, class->version);
-}
-
-
-static int
-objc_write_class (struct objc_typed_stream* stream,
- struct objc_class* class)
-{
- unsigned long key;
- if ((key = PTR2LONG(hash_value_for_key (stream->stream_table, class))))
- return objc_write_use_common (stream, key);
- else
- {
- int length;
- hash_add (&stream->stream_table, LONG2PTR(key=PTR2LONG(class)), class);
- if ((length = objc_write_register_common (stream, key)))
- return __objc_write_class (stream, class);
- return length;
- }
-}
-
-
-__inline__ int
-__objc_write_selector (struct objc_typed_stream* stream, SEL selector)
-{
- const char* sel_name;
- __objc_write_extension (stream, _BX_SEL);
- /* to handle NULL selectors */
- if ((SEL)0 == selector)
- return objc_write_string (stream, "", 0);
- sel_name = sel_get_name (selector);
- return objc_write_string (stream, sel_name, strlen ((char*)sel_name));
-}
-
-int
-objc_write_selector (struct objc_typed_stream* stream, SEL selector)
-{
- const char* sel_name;
- unsigned long key;
-
- /* to handle NULL selectors */
- if ((SEL)0 == selector)
- return __objc_write_selector (stream, selector);
-
- sel_name = sel_get_name (selector);
- if ((key = PTR2LONG(hash_value_for_key (stream->stream_table, sel_name))))
- return objc_write_use_common (stream, key);
- else
- {
- int length;
- hash_add (&stream->stream_table,
- LONG2PTR(key=PTR2LONG(sel_name)), (char*)sel_name);
- if ((length = objc_write_register_common (stream, key)))
- return __objc_write_selector (stream, selector);
- return length;
- }
-}
-
-
-
-/*
-** Read operations
-*/
-
-__inline__ int
-objc_read_char (struct objc_typed_stream* stream, char* val)
-{
- unsigned char buf;
- int len;
- len = (*stream->read)(stream->physical, &buf, 1);
- if (len != 0)
- {
- if ((buf & _B_CODE) == _B_SINT)
- (*val) = (buf & _B_VALUE);
-
- else if ((buf & _B_NUMBER) == 1)
- {
- len = (*stream->read)(stream->physical, val, 1);
- if (buf&_B_SIGN)
- (*val) = -1*(*val);
- }
-
- else
- objc_error(nil, OBJC_ERR_BAD_DATA,
- "expected 8bit signed int, got %dbit int",
- (int)(buf&_B_NUMBER)*8);
- }
- return len;
-}
-
-
-__inline__ int
-objc_read_unsigned_char (struct objc_typed_stream* stream, unsigned char* val)
-{
- unsigned char buf;
- int len;
- if ((len = (*stream->read)(stream->physical, &buf, 1)))
- {
- if ((buf & _B_CODE) == _B_SINT)
- (*val) = (buf & _B_VALUE);
-
- else if ((buf & _B_NUMBER) == 1)
- len = (*stream->read)(stream->physical, val, 1);
-
- else
- objc_error(nil, OBJC_ERR_BAD_DATA,
- "expected 8bit unsigned int, got %dbit int",
- (int)(buf&_B_NUMBER)*8);
- }
- return len;
-}
-
-__inline__ int
-objc_read_short (struct objc_typed_stream* stream, short* value)
-{
- unsigned char buf[sizeof(short)+1];
- int len;
- if ((len = (*stream->read)(stream->physical, buf, 1)))
- {
- if ((buf[0] & _B_CODE) == _B_SINT)
- (*value) = (buf[0] & _B_VALUE);
-
- else
- {
- int pos = 1;
- int nbytes = buf[0] & _B_NUMBER;
- if (nbytes > sizeof (short))
- objc_error(nil, OBJC_ERR_BAD_DATA,
- "expected short, got bigger (%dbits)", nbytes*8);
- len = (*stream->read)(stream->physical, buf+1, nbytes);
- (*value) = 0;
- while (pos <= nbytes)
- (*value) = ((*value)*0x100) + buf[pos++];
- if (buf[0] & _B_SIGN)
- (*value) = -(*value);
- }
- }
- return len;
-}
-
-__inline__ int
-objc_read_unsigned_short (struct objc_typed_stream* stream,
- unsigned short* value)
-{
- unsigned char buf[sizeof(unsigned short)+1];
- int len;
- if ((len = (*stream->read)(stream->physical, buf, 1)))
- {
- if ((buf[0] & _B_CODE) == _B_SINT)
- (*value) = (buf[0] & _B_VALUE);
-
- else
- {
- int pos = 1;
- int nbytes = buf[0] & _B_NUMBER;
- if (nbytes > sizeof (short))
- objc_error(nil, OBJC_ERR_BAD_DATA,
- "expected short, got int or bigger");
- len = (*stream->read)(stream->physical, buf+1, nbytes);
- (*value) = 0;
- while (pos <= nbytes)
- (*value) = ((*value)*0x100) + buf[pos++];
- }
- }
- return len;
-}
-
-
-__inline__ int
-objc_read_int (struct objc_typed_stream* stream, int* value)
-{
- unsigned char buf[sizeof(int)+1];
- int len;
- if ((len = (*stream->read)(stream->physical, buf, 1)))
- {
- if ((buf[0] & _B_CODE) == _B_SINT)
- (*value) = (buf[0] & _B_VALUE);
-
- else
- {
- int pos = 1;
- int nbytes = buf[0] & _B_NUMBER;
- if (nbytes > sizeof (int))
- objc_error(nil, OBJC_ERR_BAD_DATA, "expected int, got bigger");
- len = (*stream->read)(stream->physical, buf+1, nbytes);
- (*value) = 0;
- while (pos <= nbytes)
- (*value) = ((*value)*0x100) + buf[pos++];
- if (buf[0] & _B_SIGN)
- (*value) = -(*value);
- }
- }
- return len;
-}
-
-__inline__ int
-objc_read_long (struct objc_typed_stream* stream, long* value)
-{
- unsigned char buf[sizeof(long)+1];
- int len;
- if ((len = (*stream->read)(stream->physical, buf, 1)))
- {
- if ((buf[0] & _B_CODE) == _B_SINT)
- (*value) = (buf[0] & _B_VALUE);
-
- else
- {
- int pos = 1;
- int nbytes = buf[0] & _B_NUMBER;
- if (nbytes > sizeof (long))
- objc_error(nil, OBJC_ERR_BAD_DATA, "expected long, got bigger");
- len = (*stream->read)(stream->physical, buf+1, nbytes);
- (*value) = 0;
- while (pos <= nbytes)
- (*value) = ((*value)*0x100) + buf[pos++];
- if (buf[0] & _B_SIGN)
- (*value) = -(*value);
- }
- }
- return len;
-}
-
-__inline__ int
-__objc_read_nbyte_uint (struct objc_typed_stream* stream,
- unsigned int nbytes, unsigned int* val)
-{
- int len, pos = 0;
- unsigned char buf[sizeof(unsigned int)+1];
-
- if (nbytes > sizeof (int))
- objc_error(nil, OBJC_ERR_BAD_DATA, "expected int, got bigger");
-
- len = (*stream->read)(stream->physical, buf, nbytes);
- (*val) = 0;
- while (pos < nbytes)
- (*val) = ((*val)*0x100) + buf[pos++];
- return len;
-}
-
-
-__inline__ int
-objc_read_unsigned_int (struct objc_typed_stream* stream,
- unsigned int* value)
-{
- unsigned char buf[sizeof(unsigned int)+1];
- int len;
- if ((len = (*stream->read)(stream->physical, buf, 1)))
- {
- if ((buf[0] & _B_CODE) == _B_SINT)
- (*value) = (buf[0] & _B_VALUE);
-
- else
- len = __objc_read_nbyte_uint (stream, (buf[0] & _B_VALUE), value);
-
- }
- return len;
-}
-
-int
-__objc_read_nbyte_ulong (struct objc_typed_stream* stream,
- unsigned int nbytes, unsigned long* val)
-{
- int len, pos = 0;
- unsigned char buf[sizeof(unsigned long)+1];
-
- if (nbytes > sizeof (long))
- objc_error(nil, OBJC_ERR_BAD_DATA, "expected long, got bigger");
-
- len = (*stream->read)(stream->physical, buf, nbytes);
- (*val) = 0;
- while (pos < nbytes)
- (*val) = ((*val)*0x100) + buf[pos++];
- return len;
-}
-
-
-__inline__ int
-objc_read_unsigned_long (struct objc_typed_stream* stream,
- unsigned long* value)
-{
- unsigned char buf[sizeof(unsigned long)+1];
- int len;
- if ((len = (*stream->read)(stream->physical, buf, 1)))
- {
- if ((buf[0] & _B_CODE) == _B_SINT)
- (*value) = (buf[0] & _B_VALUE);
-
- else
- len = __objc_read_nbyte_ulong (stream, (buf[0] & _B_VALUE), value);
-
- }
- return len;
-}
-
-__inline__ int
-objc_read_string (struct objc_typed_stream* stream,
- char** string)
-{
- unsigned char buf[sizeof(unsigned int)+1];
- int len;
- if ((len = (*stream->read)(stream->physical, buf, 1)))
- {
- unsigned long key = 0;
-
- if ((buf[0]&_B_CODE) == _B_RCOMM) /* register following */
- {
- len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key);
- len = (*stream->read)(stream->physical, buf, 1);
- }
-
- switch (buf[0]&_B_CODE) {
- case _B_SSTR:
- {
- int length = buf[0]&_B_VALUE;
- (*string) = (char*)objc_malloc(length+1);
- if (key)
- hash_add (&stream->stream_table, LONG2PTR(key), *string);
- len = (*stream->read)(stream->physical, *string, length);
- (*string)[length] = '\0';
- }
- break;
-
- case _B_UCOMM:
- {
- char *tmp;
- len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key);
- tmp = hash_value_for_key (stream->stream_table, LONG2PTR (key));
- *string = objc_malloc (strlen(tmp) + 1);
- strcpy (*string, tmp);
- }
- break;
-
- case _B_NSTR:
- {
- unsigned int nbytes = buf[0]&_B_VALUE;
- len = __objc_read_nbyte_uint(stream, nbytes, &nbytes);
- if (len) {
- (*string) = (char*)objc_malloc(nbytes+1);
- if (key)
- hash_add (&stream->stream_table, LONG2PTR(key), *string);
- len = (*stream->read)(stream->physical, *string, nbytes);
- (*string)[nbytes] = '\0';
- }
- }
- break;
-
- default:
- objc_error(nil, OBJC_ERR_BAD_DATA,
- "expected string, got opcode %c\n", (buf[0]&_B_CODE));
- }
- }
-
- return len;
-}
-
-
-int
-objc_read_object (struct objc_typed_stream* stream, id* object)
-{
- unsigned char buf[sizeof (unsigned int)];
- int len;
- if ((len = (*stream->read)(stream->physical, buf, 1)))
- {
- SEL read_sel = sel_get_any_uid ("read:");
- unsigned long key = 0;
-
- if ((buf[0]&_B_CODE) == _B_RCOMM) /* register common */
- {
- len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key);
- len = (*stream->read)(stream->physical, buf, 1);
- }
-
- if (buf[0] == (_B_EXT | _BX_OBJECT))
- {
- Class class;
-
- /* get class */
- len = objc_read_class (stream, &class);
-
- /* create instance */
- (*object) = class_create_instance(class);
-
- /* register? */
- if (key)
- hash_add (&stream->object_table, LONG2PTR(key), *object);
-
- /* send -read: */
- if (__objc_responds_to (*object, read_sel))
- (*get_imp(class, read_sel))(*object, read_sel, stream);
-
- /* check null-byte */
- len = (*stream->read)(stream->physical, buf, 1);
- if (buf[0] != '\0')
- objc_error(nil, OBJC_ERR_BAD_DATA,
- "expected null-byte, got opcode %c", buf[0]);
- }
-
- else if ((buf[0]&_B_CODE) == _B_UCOMM)
- {
- if (key)
- objc_error(nil, OBJC_ERR_BAD_KEY, "cannot register use upcode...");
- len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key);
- (*object) = hash_value_for_key (stream->object_table, LONG2PTR(key));
- }
-
- else if (buf[0] == (_B_EXT | _BX_OBJREF)) /* a forward reference */
- {
- struct objc_list* other;
- len = objc_read_unsigned_long (stream, &key);
- other = (struct objc_list*)hash_value_for_key (stream->object_refs,
- LONG2PTR(key));
- hash_add (&stream->object_refs, LONG2PTR(key),
- (void*)list_cons(object, other));
- }
-
- else if (buf[0] == (_B_EXT | _BX_OBJROOT)) /* a root object */
- {
- if (key)
- objc_error(nil, OBJC_ERR_BAD_KEY,
- "cannot register root object...");
- len = objc_read_object (stream, object);
- __objc_finish_read_root_object (stream);
- }
-
- else
- objc_error(nil, OBJC_ERR_BAD_DATA,
- "expected object, got opcode %c", buf[0]);
- }
- return len;
-}
-
-static int
-objc_read_class (struct objc_typed_stream* stream, Class* class)
-{
- unsigned char buf[sizeof (unsigned int)];
- int len;
- if ((len = (*stream->read)(stream->physical, buf, 1)))
- {
- unsigned long key = 0;
-
- if ((buf[0]&_B_CODE) == _B_RCOMM) /* register following */
- {
- len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key);
- len = (*stream->read)(stream->physical, buf, 1);
- }
-
- if (buf[0] == (_B_EXT | _BX_CLASS))
- {
- char* class_name;
- unsigned long version;
-
- /* get class */
- len = objc_read_string (stream, &class_name);
- (*class) = objc_get_class(class_name);
- objc_free(class_name);
-
- /* register */
- if (key)
- hash_add (&stream->stream_table, LONG2PTR(key), *class);
-
- objc_read_unsigned_long(stream, &version);
- hash_add (&stream->class_table, (*class)->name, (void*)version);
- }
-
- else if ((buf[0]&_B_CODE) == _B_UCOMM)
- {
- if (key)
- objc_error(nil, OBJC_ERR_BAD_KEY, "cannot register use upcode...");
- len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key);
- (*class) = hash_value_for_key (stream->stream_table, LONG2PTR(key));
- if (!*class)
- objc_error(nil, OBJC_ERR_BAD_CLASS,
- "cannot find class for key %lu", key);
- }
-
- else
- objc_error(nil, OBJC_ERR_BAD_DATA,
- "expected class, got opcode %c", buf[0]);
- }
- return len;
-}
-
-int
-objc_read_selector (struct objc_typed_stream* stream, SEL* selector)
-{
- unsigned char buf[sizeof (unsigned int)];
- int len;
- if ((len = (*stream->read)(stream->physical, buf, 1)))
- {
- unsigned long key = 0;
-
- if ((buf[0]&_B_CODE) == _B_RCOMM) /* register following */
- {
- len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key);
- len = (*stream->read)(stream->physical, buf, 1);
- }
-
- if (buf[0] == (_B_EXT|_BX_SEL)) /* selector! */
- {
- char* selector_name;
-
- /* get selector */
- len = objc_read_string (stream, &selector_name);
- /* To handle NULL selectors */
- if (0 == strlen(selector_name))
- {
- (*selector) = (SEL)0;
- return 0;
- }
- else
- (*selector) = sel_get_any_uid(selector_name);
- objc_free(selector_name);
-
- /* register */
- if (key)
- hash_add (&stream->stream_table, LONG2PTR(key), (void*)*selector);
- }
-
- else if ((buf[0]&_B_CODE) == _B_UCOMM)
- {
- if (key)
- objc_error(nil, OBJC_ERR_BAD_KEY, "cannot register use upcode...");
- len = __objc_read_nbyte_ulong(stream, (buf[0] & _B_VALUE), &key);
- (*selector) = hash_value_for_key (stream->stream_table,
- LONG2PTR(key));
- }
-
- else
- objc_error(nil, OBJC_ERR_BAD_DATA,
- "expected selector, got opcode %c", buf[0]);
- }
- return len;
-}
-
-/*
-** USER LEVEL FUNCTIONS
-*/
-
-/*
-** Write one object, encoded in TYPE and pointed to by DATA to the
-** typed stream STREAM.
-*/
-
-int
-objc_write_type(TypedStream* stream, const char* type, const void* data)
-{
- switch(*type) {
- case _C_ID:
- return objc_write_object (stream, *(id*)data);
- break;
-
- case _C_CLASS:
- return objc_write_class (stream, *(Class*)data);
- break;
-
- case _C_SEL:
- return objc_write_selector (stream, *(SEL*)data);
- break;
-
- case _C_CHR:
- return objc_write_char(stream, *(signed char*)data);
- break;
-
- case _C_UCHR:
- return objc_write_unsigned_char(stream, *(unsigned char*)data);
- break;
-
- case _C_SHT:
- return objc_write_short(stream, *(short*)data);
- break;
-
- case _C_USHT:
- return objc_write_unsigned_short(stream, *(unsigned short*)data);
- break;
-
- case _C_INT:
- return objc_write_int(stream, *(int*)data);
- break;
-
- case _C_UINT:
- return objc_write_unsigned_int(stream, *(unsigned int*)data);
- break;
-
- case _C_LNG:
- return objc_write_long(stream, *(long*)data);
- break;
-
- case _C_ULNG:
- return objc_write_unsigned_long(stream, *(unsigned long*)data);
- break;
-
- case _C_CHARPTR:
- return objc_write_string (stream, *(char**)data, strlen(*(char**)data));
- break;
-
- case _C_ATOM:
- return objc_write_string_atomic (stream, *(char**)data,
- strlen(*(char**)data));
- break;
-
- case _C_ARY_B:
- {
- int len = atoi(type+1);
- while (isdigit(*++type))
- ;
- return objc_write_array (stream, type, len, data);
- }
- 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);
- objc_write_type (stream, type, ((char*)data)+acc_size);
- acc_size += objc_sizeof_type (type); /* add component size */
- type = objc_skip_typespec (type); /* skip component */
- }
- return 1;
- }
-
- default:
- {
- objc_error(nil, OBJC_ERR_BAD_TYPE,
- "objc_write_type: cannot parse typespec: %s\n", type);
- return 0;
- }
- }
-}
-
-/*
-** Read one object, encoded in TYPE and pointed to by DATA to the
-** typed stream STREAM. DATA specifies the address of the types to
-** read. Expected type is checked against the type actually present
-** on the stream.
-*/
-
-int
-objc_read_type(TypedStream* stream, const char* type, void* data)
-{
- char c;
- switch(c = *type) {
- case _C_ID:
- return objc_read_object (stream, (id*)data);
- break;
-
- case _C_CLASS:
- return objc_read_class (stream, (Class*)data);
- break;
-
- case _C_SEL:
- return objc_read_selector (stream, (SEL*)data);
- break;
-
- case _C_CHR:
- return objc_read_char (stream, (char*)data);
- break;
-
- case _C_UCHR:
- return objc_read_unsigned_char (stream, (unsigned char*)data);
- break;
-
- case _C_SHT:
- return objc_read_short (stream, (short*)data);
- break;
-
- case _C_USHT:
- return objc_read_unsigned_short (stream, (unsigned short*)data);
- break;
-
- case _C_INT:
- return objc_read_int (stream, (int*)data);
- break;
-
- case _C_UINT:
- return objc_read_unsigned_int (stream, (unsigned int*)data);
- break;
-
- case _C_LNG:
- return objc_read_long (stream, (long*)data);
- break;
-
- case _C_ULNG:
- return objc_read_unsigned_long (stream, (unsigned long*)data);
- break;
-
- case _C_CHARPTR:
- case _C_ATOM:
- return objc_read_string (stream, (char**)data);
- break;
-
- case _C_ARY_B:
- {
- int len = atoi(type+1);
- while (isdigit(*++type))
- ;
- return objc_read_array (stream, type, len, data);
- }
- 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);
- objc_read_type (stream, type, ((char*)data)+acc_size);
- acc_size += objc_sizeof_type (type); /* add component size */
- type = objc_skip_typespec (type); /* skip component */
- }
- return 1;
- }
-
- default:
- {
- objc_error(nil, OBJC_ERR_BAD_TYPE,
- "objc_read_type: cannot parse typespec: %s\n", type);
- return 0;
- }
- }
-}
-
-/*
-** Write the object specified by the template TYPE to STREAM. Last
-** arguments specify addresses of values to be written. It might
-** seem surprising to specify values by address, but this is extremely
-** convenient for copy-paste with objc_read_types calls. A more
-** down-to-the-earth cause for this passing of addresses is that values
-** of arbitrary size is not well supported in ANSI C for functions with
-** variable number of arguments.
-*/
-
-int
-objc_write_types (TypedStream* stream, const char* type, ...)
-{
- va_list args;
- const char *c;
- int res = 0;
-
- va_start(args, type);
-
- for (c = type; *c; c = objc_skip_typespec (c))
- {
- switch(*c) {
- case _C_ID:
- res = objc_write_object (stream, *va_arg (args, id*));
- break;
-
- case _C_CLASS:
- res = objc_write_class (stream, *va_arg(args, Class*));
- break;
-
- case _C_SEL:
- res = objc_write_selector (stream, *va_arg(args, SEL*));
- break;
-
- case _C_CHR:
- res = objc_write_char (stream, *va_arg (args, char*));
- break;
-
- case _C_UCHR:
- res = objc_write_unsigned_char (stream,
- *va_arg (args, unsigned char*));
- break;
-
- case _C_SHT:
- res = objc_write_short (stream, *va_arg(args, short*));
- break;
-
- case _C_USHT:
- res = objc_write_unsigned_short (stream,
- *va_arg(args, unsigned short*));
- break;
-
- case _C_INT:
- res = objc_write_int(stream, *va_arg(args, int*));
- break;
-
- case _C_UINT:
- res = objc_write_unsigned_int(stream, *va_arg(args, unsigned int*));
- break;
-
- case _C_LNG:
- res = objc_write_long(stream, *va_arg(args, long*));
- break;
-
- case _C_ULNG:
- res = objc_write_unsigned_long(stream, *va_arg(args, unsigned long*));
- break;
-
- case _C_CHARPTR:
- {
- char** str = va_arg(args, char**);
- res = objc_write_string (stream, *str, strlen(*str));
- }
- break;
-
- case _C_ATOM:
- {
- char** str = va_arg(args, char**);
- res = objc_write_string_atomic (stream, *str, strlen(*str));
- }
- break;
-
- case _C_ARY_B:
- {
- int len = atoi(c+1);
- const char* t = c;
- while (isdigit(*++t))
- ;
- res = objc_write_array (stream, t, len, va_arg(args, void*));
- t = objc_skip_typespec (t);
- if (*t != _C_ARY_E)
- objc_error(nil, OBJC_ERR_BAD_TYPE, "expected `]', got: %s", t);
- }
- break;
-
- default:
- objc_error(nil, OBJC_ERR_BAD_TYPE,
- "objc_write_types: cannot parse typespec: %s\n", type);
- }
- }
- va_end(args);
- return res;
-}
-
-
-/*
-** Last arguments specify addresses of values to be read. Expected
-** type is checked against the type actually present on the stream.
-*/
-
-int
-objc_read_types(TypedStream* stream, const char* type, ...)
-{
- va_list args;
- const char *c;
- int res = 0;
-
- va_start(args, type);
-
- for (c = type; *c; c = objc_skip_typespec(c))
- {
- switch(*c) {
- case _C_ID:
- res = objc_read_object(stream, va_arg(args, id*));
- break;
-
- case _C_CLASS:
- res = objc_read_class(stream, va_arg(args, Class*));
- break;
-
- case _C_SEL:
- res = objc_read_selector(stream, va_arg(args, SEL*));
- break;
-
- case _C_CHR:
- res = objc_read_char(stream, va_arg(args, char*));
- break;
-
- case _C_UCHR:
- res = objc_read_unsigned_char(stream, va_arg(args, unsigned char*));
- break;
-
- case _C_SHT:
- res = objc_read_short(stream, va_arg(args, short*));
- break;
-
- case _C_USHT:
- res = objc_read_unsigned_short(stream, va_arg(args, unsigned short*));
- break;
-
- case _C_INT:
- res = objc_read_int(stream, va_arg(args, int*));
- break;
-
- case _C_UINT:
- res = objc_read_unsigned_int(stream, va_arg(args, unsigned int*));
- break;
-
- case _C_LNG:
- res = objc_read_long(stream, va_arg(args, long*));
- break;
-
- case _C_ULNG:
- res = objc_read_unsigned_long(stream, va_arg(args, unsigned long*));
- break;
-
- case _C_CHARPTR:
- case _C_ATOM:
- {
- char** str = va_arg(args, char**);
- res = objc_read_string (stream, str);
- }
- break;
-
- case _C_ARY_B:
- {
- int len = atoi(c+1);
- const char* t = c;
- while (isdigit(*++t))
- ;
- res = objc_read_array (stream, t, len, va_arg(args, void*));
- t = objc_skip_typespec (t);
- if (*t != _C_ARY_E)
- objc_error(nil, OBJC_ERR_BAD_TYPE, "expected `]', got: %s", t);
- }
- break;
-
- default:
- objc_error(nil, OBJC_ERR_BAD_TYPE,
- "objc_read_types: cannot parse typespec: %s\n", type);
- }
- }
- va_end(args);
- return res;
-}
-
-/*
-** Write an array of COUNT elements of TYPE from the memory address DATA.
-** This is equivalent of objc_write_type (stream, "[N<type>]", data)
-*/
-
-int
-objc_write_array (TypedStream* stream, const char* type,
- int count, const void* data)
-{
- int off = objc_sizeof_type(type);
- const char* where = data;
-
- while (count-- > 0)
- {
- objc_write_type(stream, type, where);
- where += off;
- }
- return 1;
-}
-
-/*
-** Read an array of COUNT elements of TYPE into the memory address
-** DATA. The memory pointed to by data is supposed to be allocated
-** by the callee. This is equivalent of
-** objc_read_type (stream, "[N<type>]", data)
-*/
-
-int
-objc_read_array (TypedStream* stream, const char* type,
- int count, void* data)
-{
- int off = objc_sizeof_type(type);
- char* where = (char*)data;
-
- while (count-- > 0)
- {
- objc_read_type(stream, type, where);
- where += off;
- }
- return 1;
-}
-
-static int
-__objc_fread(FILE* file, char* data, int len)
-{
- return fread(data, len, 1, file);
-}
-
-static int
-__objc_fwrite(FILE* file, char* data, int len)
-{
- return fwrite(data, len, 1, file);
-}
-
-static int
-__objc_feof(FILE* file)
-{
- return feof(file);
-}
-
-static int
-__objc_no_write(FILE* file, char* data, int len)
-{
- objc_error (nil, OBJC_ERR_NO_WRITE, "TypedStream not open for writing");
- return 0;
-}
-
-static int
-__objc_no_read(FILE* file, char* data, int len)
-{
- objc_error (nil, OBJC_ERR_NO_READ, "TypedStream not open for reading");
- return 0;
-}
-
-static int
-__objc_read_typed_stream_signature (TypedStream* stream)
-{
- char buffer[80];
- int pos = 0;
- do
- (*stream->read)(stream->physical, buffer+pos, 1);
- while (buffer[pos++] != '\0')
- ;
- sscanf (buffer, "GNU TypedStream %d", &stream->version);
- if (stream->version != OBJC_TYPED_STREAM_VERSION)
- objc_error (nil, OBJC_ERR_STREAM_VERSION,
- "cannot handle TypedStream version %d", stream->version);
- return 1;
-}
-
-static int
-__objc_write_typed_stream_signature (TypedStream* stream)
-{
- char buffer[80];
- sprintf(buffer, "GNU TypedStream %d", OBJC_TYPED_STREAM_VERSION);
- stream->version = OBJC_TYPED_STREAM_VERSION;
- (*stream->write)(stream->physical, buffer, strlen(buffer)+1);
- return 1;
-}
-
-static void __objc_finish_write_root_object(struct objc_typed_stream* stream)
-{
- hash_delete (stream->object_table);
- stream->object_table = hash_new(64,
- (hash_func_type)hash_ptr,
- (compare_func_type)compare_ptrs);
-}
-
-static void __objc_finish_read_root_object(struct objc_typed_stream* stream)
-{
- node_ptr node;
- SEL awake_sel = sel_get_any_uid ("awake");
- cache_ptr free_list = hash_new (64,
- (hash_func_type) hash_ptr,
- (compare_func_type) compare_ptrs);
-
- /* resolve object forward references */
- for (node = hash_next (stream->object_refs, NULL); node;
- node = hash_next (stream->object_refs, node))
- {
- struct objc_list* reflist = node->value;
- const void* key = node->key;
- id object = hash_value_for_key (stream->object_table, key);
- while(reflist)
- {
- *((id*)reflist->head) = object;
- if (hash_value_for_key (free_list,reflist) == NULL)
- hash_add (&free_list,reflist,reflist);
-
- reflist = reflist->tail;
- }
- }
-
- /* apply __objc_free to all objects stored in free_list */
- for (node = hash_next (free_list, NULL); node;
- node = hash_next (free_list, node))
- objc_free ((void *) node->key);
-
- hash_delete (free_list);
-
- /* empty object reference table */
- hash_delete (stream->object_refs);
- stream->object_refs = hash_new(8, (hash_func_type)hash_ptr,
- (compare_func_type)compare_ptrs);
-
- /* call -awake for all objects read */
- if (awake_sel)
- {
- for (node = hash_next (stream->object_table, NULL); node;
- node = hash_next (stream->object_table, node))
- {
- id object = node->value;
- if (__objc_responds_to (object, awake_sel))
- (*objc_msg_lookup(object, awake_sel))(object, awake_sel);
- }
- }
-
- /* empty object table */
- hash_delete (stream->object_table);
- stream->object_table = hash_new(64,
- (hash_func_type)hash_ptr,
- (compare_func_type)compare_ptrs);
-}
-
-/*
-** Open the stream PHYSICAL in MODE
-*/
-
-TypedStream*
-objc_open_typed_stream (FILE* physical, int mode)
-{
- TypedStream* s = (TypedStream*)objc_malloc(sizeof(TypedStream));
-
- s->mode = mode;
- s->physical = physical;
- s->stream_table = hash_new(64,
- (hash_func_type)hash_ptr,
- (compare_func_type)compare_ptrs);
- s->object_table = hash_new(64,
- (hash_func_type)hash_ptr,
- (compare_func_type)compare_ptrs);
- s->eof = (objc_typed_eof_func)__objc_feof;
- s->flush = (objc_typed_flush_func)fflush;
- s->writing_root_p = 0;
- if (mode == OBJC_READONLY)
- {
- s->class_table = hash_new(8, (hash_func_type)hash_string,
- (compare_func_type)compare_strings);
- s->object_refs = hash_new(8, (hash_func_type)hash_ptr,
- (compare_func_type)compare_ptrs);
- s->read = (objc_typed_read_func)__objc_fread;
- s->write = (objc_typed_write_func)__objc_no_write;
- __objc_read_typed_stream_signature (s);
- }
- else if (mode == OBJC_WRITEONLY)
- {
- s->class_table = 0;
- s->object_refs = 0;
- s->read = (objc_typed_read_func)__objc_no_read;
- s->write = (objc_typed_write_func)__objc_fwrite;
- __objc_write_typed_stream_signature (s);
- }
- else
- {
- objc_close_typed_stream (s);
- return NULL;
- }
- s->type = OBJC_FILE_STREAM;
- return s;
-}
-
-/*
-** Open the file named by FILE_NAME in MODE
-*/
-
-TypedStream*
-objc_open_typed_stream_for_file (const char* file_name, int mode)
-{
- FILE* file = NULL;
- TypedStream* s;
-
- if (mode == OBJC_READONLY)
- file = fopen (file_name, "r");
- else
- file = fopen (file_name, "w");
-
- if (file)
- {
- s = objc_open_typed_stream (file, mode);
- if (s)
- s->type |= OBJC_MANAGED_STREAM;
- return s;
- }
- else
- return NULL;
-}
-
-/*
-** Close STREAM freeing the structure it self. If it was opened with
-** objc_open_typed_stream_for_file, the file will also be closed.
-*/
-
-void
-objc_close_typed_stream (TypedStream* stream)
-{
- if (stream->mode == OBJC_READONLY)
- {
- __objc_finish_read_root_object (stream); /* Just in case... */
- hash_delete (stream->class_table);
- hash_delete (stream->object_refs);
- }
-
- hash_delete (stream->stream_table);
- hash_delete (stream->object_table);
-
- if (stream->type == (OBJC_MANAGED_STREAM | OBJC_FILE_STREAM))
- fclose ((FILE*)stream->physical);
-
- objc_free(stream);
-}
-
-BOOL
-objc_end_of_typed_stream (TypedStream* stream)
-{
- return (*stream->eof)(stream->physical);
-}
-
-void
-objc_flush_typed_stream (TypedStream* stream)
-{
- (*stream->flush)(stream->physical);
-}
-
-long
-objc_get_stream_class_version (TypedStream* stream, Class class)
-{
- if (stream->class_table)
- return PTR2LONG(hash_value_for_key (stream->class_table, class->name));
- else
- return class_get_version (class);
-}
-
projects / msp430-gcc.git / blobdiff