| [2] | 1 | /* Basic data types for Objective C.
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| 2 | Copyright (C) 1998 Free Software Foundation, Inc.
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| 3 | Contributed by Ovidiu Predescu.
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| 4 |
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| 5 | This file is part of GNU CC.
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| 6 |
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| 7 | GNU CC is free software; you can redistribute it and/or modify
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| 8 | it under the terms of the GNU General Public License as published by
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| 9 | the Free Software Foundation; either version 2, or (at your option)
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| 10 | any later version.
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| 11 |
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| 12 | GNU CC is distributed in the hope that it will be useful,
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | GNU General Public License for more details.
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| 16 |
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| 17 | You should have received a copy of the GNU General Public License
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| 18 | along with GNU CC; see the file COPYING. If not, write to
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| 19 | the Free Software Foundation, 59 Temple Place - Suite 330,
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| 20 | Boston, MA 02111-1307, USA. */
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| 21 |
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| 22 | /* As a special exception, if you link this library with files
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| 23 | compiled with GCC to produce an executable, this does not cause
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| 24 | the resulting executable to be covered by the GNU General Public License.
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| 25 | This exception does not however invalidate any other reasons why
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| 26 | the executable file might be covered by the GNU General Public License. */
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| 27 |
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| 28 | #include "tconfig.h"
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| 29 | #include "objc.h"
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| 30 | #include "encoding.h"
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| 31 |
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| 32 | #include <assert.h>
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| 33 | #include <string.h>
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| 34 |
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| 35 | #if OBJC_WITH_GC
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| 36 |
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| 37 | #include <gc.h>
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| 38 |
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| 39 | /* gc_typed.h uses the following but doesn't declare them */
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| 40 | typedef GC_word word;
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| 41 | typedef GC_signed_word signed_word;
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| 42 |
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| 43 | #if BITS_PER_WORD == 32
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| 44 | # define LOGWL 5
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| 45 | # define modWORDSZ(n) ((n) & 0x1f) /* n mod size of word */
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| 46 | #endif
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| 47 |
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| 48 | #if BITS_PER_WORD == 64
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| 49 | # define LOGWL 6
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| 50 | # define modWORDSZ(n) ((n) & 0x3f) /* n mod size of word */
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| 51 | #endif
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| 52 |
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| 53 | #define divWORDSZ(n) ((n) >> LOGWL) /* divide n by size of word */
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| 54 |
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| 55 | #include <gc_typed.h>
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| 56 |
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| 57 | /* The following functions set up in `mask` the corresponding pointers.
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| 58 | The offset is incremented with the size of the type. */
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| 59 |
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| 60 | #define ROUND(V, A) \
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| 61 | ({ typeof(V) __v=(V); typeof(A) __a=(A); \
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| 62 | __a*((__v+__a-1)/__a); })
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| 63 |
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| 64 | #define SET_BIT_FOR_OFFSET(mask, offset) \
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| 65 | GC_set_bit(mask, offset / sizeof (void*))
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| 66 |
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| 67 | /* Some prototypes */
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| 68 | static void
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| 69 | __objc_gc_setup_struct (GC_bitmap mask, const char *type, int offset);
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| 70 | static void
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| 71 | __objc_gc_setup_union (GC_bitmap mask, const char *type, int offset);
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| 72 |
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| 73 |
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| 74 | static void
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| 75 | __objc_gc_setup_array (GC_bitmap mask, const char *type, int offset)
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| 76 | {
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| 77 | int i, len = atoi(type + 1);
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| 78 |
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| 79 | while (isdigit(*++type))
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| 80 | /* do nothing */; /* skip the size of the array */
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| 81 |
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| 82 | switch (*type) {
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| 83 | case _C_ARY_B:
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| 84 | for (i = 0; i < len; i++)
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