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- /* GNU Objective C Runtime archiving
- Copyright (C) 1993 Free Software Foundation, Inc.
-
- Author: 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, 675 Mass Ave, Cambridge, MA 02139, 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. */
-
- /*
- ** Note: This version assumes that int and longs are both 32bit.
- */
-
- #ifndef __alpha__
-
- #include "runtime.h"
- #include "typedstream.h"
-
- #define __objc_fatal(format, args...) \
- { fprintf(stderr, "archiving: "); \
- fprintf(stderr, format, ## args); \
- fprintf(stderr, "\n"); abort(); }
-
- /* Declare some functions... */
-
- static int
- objc_read_class (struct objc_typed_stream* stream, Class** class);
-
- static int
- objc_sizeof_type(const char* type);
-
- static int
- objc_write_use_common (struct objc_typed_stream* stream, unsigned int key);
-
- static int
- objc_write_register_common (struct objc_typed_stream* stream,
- unsigned int key);
-
- static int
- objc_write_class (struct objc_typed_stream* stream,
- struct objc_class* class);
-
- static 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, 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, 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 <= 0xffU)
- return __objc_code_unsigned_char (buf, val);
-
- else
- {
- buf[0] = _B_NINT|0x02;
- buf[1] = val/0x100;
- buf[2] = val%0x100;
- return 3;
- }
- }
-
- 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)
- {
- if (val > 0)
- return __objc_code_unsigned_short (buf, val);
-
- if (val > -0x7f) /* val > -128 */
- return __objc_code_char (buf, val);
-
- else
- {
- int len = __objc_code_unsigned_short (buf, -val);
- buf[0] |= _B_SIGN;
- return len;
- }
- }
-
- 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 < 0x10000)
- return __objc_code_unsigned_short (buf, val%0x10000);
-
- else if (val < 0x1000000)
- {
- buf[0] = _B_NINT|3;
- buf[1] = val/0x10000;
- buf[2] = (val%0x10000)/0x100;
- buf[3] = val%0x100;
- return 4;
- }
-
- else
- {
- buf[0] = _B_NINT|4;
- buf[1] = val/0x1000000;
- buf[2] = (val%0x1000000)/0x10000;
- buf[3] = (val%0x10000)/0x100;
- buf[4] = val%0x100;
- return 5;
- }
- }
-
- 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)
- {
- if (val >= 0)
- return __objc_code_unsigned_int (buf, val);
-
- if (val > -0x7f)
- return __objc_code_char (buf, val);
-
- else
- {
- int len = __objc_code_unsigned_int (buf, -val);
- buf[0] |= _B_SIGN;
- return len;
- }
- }
-
- 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);
- }
-
- 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 int key;
- if ((key = (unsigned int)hash_value_for_key (stream->stream_table, string)))
- return objc_write_use_common (stream, key);
- else
- {
- int length;
- hash_add (&stream->stream_table, (void*)key=(unsigned int)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 int key)
- {
- unsigned char buf[sizeof (unsigned int)+2];
- int len = __objc_code_unsigned_int (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 int key)
- {
- unsigned char buf[sizeof (unsigned int)+2];
- int len = __objc_code_unsigned_int (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
- abort();
- }
-
- __inline__ int
- __objc_write_object (struct objc_typed_stream* stream, id object)
- {
- unsigned char buf = '\0';
- SEL write_sel = sel_get_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 int key;
- if ((key = (unsigned int)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_int (stream, (unsigned int)object);
- }
-
- int
- objc_write_root_object (struct objc_typed_stream* stream, id object)
- {
- int len;
- if (stream->writing_root_p)
- __objc_fatal ("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 int key;
- if ((key = (unsigned int)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, (void*)key=(unsigned int)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_int (stream, CLS_GETNUMBER(class));
- }
-
-
- static int
- objc_write_class (struct objc_typed_stream* stream,
- struct objc_class* class)
- {
- unsigned int key;
- if ((key = (unsigned int)hash_value_for_key (stream->stream_table, class)))
- return objc_write_use_common (stream, key);
- else
- {
- int length;
- hash_add (&stream->stream_table, (void*)key=(unsigned int)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 = sel_get_name (selector);
- __objc_write_extension (stream, _BX_SEL);
- 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 = sel_get_name (selector);
- unsigned int key;
- if ((key = (unsigned int)hash_value_for_key (stream->stream_table, sel_name)))
- return objc_write_use_common (stream, key);
- else
- {
- int length;
- hash_add (&stream->stream_table, (void*)key=(unsigned int)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_fatal("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_fatal("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_fatal("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_fatal("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_fatal("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_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_fatal("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;
- }
-
- __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 int key = 0;
-
- if ((buf[0]&_B_CODE) == _B_RCOMM) /* register following */
- {
- len = __objc_read_nbyte_uint(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_xmalloc(length+1);
- if (key)
- hash_add (&stream->stream_table, (void*)key, *string);
- len = (*stream->read)(stream->physical, *string, length);
- (*string)[length] = '\0';
- }
- break;
-
- case _B_UCOMM:
- {
- char *tmp;
- len = __objc_read_nbyte_uint (stream, (buf[0] & _B_VALUE), &key);
- tmp = hash_value_for_key (stream->stream_table, (void*)key);
- *string = __objc_xmalloc (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_xmalloc(nbytes+1);
- if (key)
- hash_add (&stream->stream_table, (void*)key, *string);
- len = (*stream->read)(stream->physical, *string, nbytes);
- (*string)[nbytes] = '\0';
- }
- }
- break;
-
- default:
- __objc_fatal("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_uid ("read:");
- unsigned int key = 0;
-
- if ((buf[0]&_B_CODE) == _B_RCOMM) /* register common */
- {
- len = __objc_read_nbyte_uint(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, (void*)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_fatal("expected null-byte, got opcode %c", buf[0]);
- }
-
- else if ((buf[0]&_B_CODE) == _B_UCOMM)
- {
- if (key)
- __objc_fatal("cannot register use upcode...");
- len = __objc_read_nbyte_uint(stream, (buf[0] & _B_VALUE), &key);
- (*object) = hash_value_for_key (stream->object_table, (void*)key);
- }
-
- else if (buf[0] == (_B_EXT | _BX_OBJREF)) /* a forward reference */
- {
- struct objc_list* other;
- len = objc_read_unsigned_int (stream, &key);
- other = (struct objc_list*)hash_value_for_key (stream->object_refs, (void*)key);
- hash_add (&stream->object_refs, (void*)key, (void*)list_cons(object, other));
- }
-
- else if (buf[0] == (_B_EXT | _BX_OBJROOT)) /* a root object */
- {
- if (key)
- __objc_fatal("cannot register root object...");
- len = objc_read_object (stream, object);
- __objc_finish_read_root_object (stream);
- }
-
- else
- __objc_fatal("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 int key = 0;
-
- if ((buf[0]&_B_CODE) == _B_RCOMM) /* register following */
- {
- len = __objc_read_nbyte_uint(stream, (buf[0] & _B_VALUE), &key);
- len = (*stream->read)(stream->physical, buf, 1);
- }
-
- if (buf[0] == (_B_EXT | _BX_CLASS))
- {
- char* class_name;
- int version;
-
- /* get class */
- len = objc_read_string (stream, &class_name);
- (*class) = objc_get_class(class_name);
- free (class_name);
-
- /* register */
- if (key)
- hash_add (&stream->stream_table, (void*)key, *class);
-
- objc_read_unsigned_int(stream, &version);
- hash_add (&stream->class_table, (*class)->name, (void*)version);
- }
-
- else if ((buf[0]&_B_CODE) == _B_UCOMM)
- {
- if (key)
- __objc_fatal("cannot register use upcode...");
- len = __objc_read_nbyte_uint(stream, (buf[0] & _B_VALUE), &key);
- (*class) = hash_value_for_key (stream->stream_table, (void*)key);
- if (!*class)
- __objc_fatal("cannot find class for key %x", key);
- }
-
- else
- __objc_fatal("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 int key = 0;
-
- if ((buf[0]&_B_CODE) == _B_RCOMM) /* register following */
- {
- len = __objc_read_nbyte_uint(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);
- (*selector) = sel_get_uid(selector_name);
- free (selector_name);
-
- /* register */
- if (key)
- hash_add (&stream->stream_table, (void*)key, *selector);
- }
-
- else if ((buf[0]&_B_CODE) == _B_UCOMM)
- {
- if (key)
- __objc_fatal("cannot register use upcode...");
- len = __objc_read_nbyte_uint(stream, (buf[0] & _B_VALUE), &key);
- (*selector) = hash_value_for_key (stream->stream_table, (void*)key);
- }
-
- else
- __objc_fatal("expected selector, got opcode %c", buf[0]);
- }
- return len;
- }
-
- static 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:
- case _C_LNG:
- return sizeof(int);
- break;
-
- case _C_UINT:
- case _C_ULNG:
- return sizeof(unsigned int);
- break;
-
- case _C_ATOM:
- case _C_CHARPTR:
- return sizeof(char*);
- break;
-
- default:
- fprintf(stderr, "objc_sizeof_type: cannot parse typespec: %s\n", type);
- abort();
- }
- }
-
-
- static const char*
- __objc_skip_type (const char* type)
- {
- switch (*type) {
- case _C_ID:
- 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:
- return ++type;
- break;
-
- case _C_ARY_B:
- while(isdigit(*++type));
- type = __objc_skip_type(type);
- if (*type == _C_ARY_E)
- return ++type;
- else
- __objc_fatal("cannot parse typespec: %s", type);
- break;
-
- default:
- fprintf(stderr, "__objc_skip_type: cannot parse typespec: %s\n", type);
- abort();
- }
- }
-
- /*
- ** 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, *(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:
- case _C_LNG:
- return objc_write_int(stream, *(int*)data);
- break;
-
- case _C_UINT:
- case _C_ULNG:
- return objc_write_unsigned_int(stream, *(unsigned int*)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;
-
- default:
- fprintf(stderr, "objc_write_type: cannot parse typespec: %s\n", type);
- abort();
- }
- }
-
- /*
- ** 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:
- case _C_LNG:
- return objc_read_int (stream, (int*)data);
- break;
-
- case _C_UINT:
- case _C_ULNG:
- return objc_read_unsigned_int (stream, (unsigned int*)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;
-
- default:
- fprintf(stderr, "objc_read_type: cannot parse typespec: %s\n", type);
- abort();
- }
- }
-
- /*
- ** 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_type (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:
- case _C_LNG:
- res = objc_write_int(stream, *va_arg(args, int*));
- break;
-
- case _C_UINT:
- case _C_ULNG:
- res = objc_write_unsigned_int(stream, *va_arg(args, unsigned int*));
- 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_type (t);
- if (*t != _C_ARY_E)
- __objc_fatal("expected `]', got: %s", t);
- }
- break;
-
- default:
- fprintf(stderr, "objc_write_types: cannot parse typespec: %s\n", type);
- abort();
- }
- }
- 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_type(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:
- case _C_LNG:
- res = objc_read_int(stream, va_arg(args, int*));
- break;
-
- case _C_UINT:
- case _C_ULNG:
- res = objc_read_unsigned_int(stream, va_arg(args, unsigned int*));
- 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_type (t);
- if (*t != _C_ARY_E)
- __objc_fatal("expected `]', got: %s", t);
- }
- break;
-
- default:
- fprintf(stderr, "objc_read_types: cannot parse typespec: %s\n", type);
- abort();
- }
- }
- 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_fatal ("TypedStream not open for writing");
- }
-
- static int
- __objc_no_read(FILE* file, char* data, int len)
- {
- __objc_fatal ("TypedStream not open for reading");
- }
-
- 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_fatal ("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_uid ("awake");
-
- /* 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;
- reflist = reflist->tail;
- }
- list_free (node->value);
- }
-
- /* 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)
- {
- int fflush(FILE*);
-
- TypedStream* s = (TypedStream*)__objc_xmalloc(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);
-
- 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);
- }
-
- int
- objc_get_stream_class_version (TypedStream* stream, Class* class)
- {
- if (stream->class_table)
- return (int) hash_value_for_key (stream->class_table, class->name);
- else
- return class_get_version (class);
- }
-
- #endif /* __alpha__ */
-