| 1 | /* imalloc.h -- internal malloc definitions shared by source files. */
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| 2 |
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| 3 | /* Copyright (C) 2001-2003 Free Software Foundation, Inc.
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| 4 |
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| 5 | This file is part of GNU Bash, the Bourne Again SHell.
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| 6 |
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| 7 | Bash is free software; you can redistribute it and/or modify it under
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| 8 | the terms of the GNU General Public License as published by the Free
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| 9 | Software Foundation; either version 2, or (at your option) any later
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| 10 | version.
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| 11 |
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| 12 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY
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| 13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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| 15 | 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 along
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| 18 | with Bash; see the file COPYING. If not, write to the Free Software
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| 19 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
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| 20 |
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| 21 | /* Must be included *after* config.h */
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| 22 |
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| 23 | #ifndef _IMALLOC_H
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| 24 | #define _IMALLOC_H
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| 25 |
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| 26 | #ifdef MALLOC_DEBUG
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| 27 | #define MALLOC_STATS
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| 28 | #define MALLOC_TRACE
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| 29 | #define MALLOC_REGISTER
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| 30 | #define MALLOC_WATCH
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| 31 | #endif
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| 32 |
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| 33 | #define MALLOC_WRAPFUNCS
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| 34 |
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| 35 | /* Generic pointer type. */
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| 36 | #ifndef PTR_T
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| 37 | # if defined (__STDC__)
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| 38 | # define PTR_T void *
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| 39 | # else
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| 40 | # define PTR_T char *
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| 41 | # endif
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| 42 | #endif
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| 43 |
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| 44 | #if !defined (NULL)
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| 45 | # define NULL 0
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| 46 | #endif
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| 47 |
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| 48 | #if !defined (__STRING)
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| 49 | # if defined (HAVE_STRINGIZE)
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| 50 | # define __STRING(x) #x
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| 51 | # else
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| 52 | # define __STRING(x) "x"
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| 53 | # endif /* !HAVE_STRINGIZE */
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| 54 | #endif /* !__STRING */
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| 55 |
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| 56 | #if __GNUC__ > 1
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| 57 | # define FASTCOPY(s, d, n) __builtin_memcpy (d, s, n)
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| 58 | #else /* !__GNUC__ */
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| 59 | # if !defined (HAVE_BCOPY)
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| 60 | # if !defined (HAVE_MEMMOVE)
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| 61 | # define FASTCOPY(s, d, n) memcpy (d, s, n)
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| 62 | # else
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| 63 | # define FASTCOPY(s, d, n) memmove (d, s, n)
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| 64 | # endif /* !HAVE_MEMMOVE */
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| 65 | # else /* HAVE_BCOPY */
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| 66 | # define FASTCOPY(s, d, n) bcopy (s, d, n)
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| 67 | # endif /* HAVE_BCOPY */
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| 68 | #endif /* !__GNUC__ */
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| 69 |
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| 70 | #if !defined (__P)
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| 71 | # if defined (__STDC__) || defined (__GNUC__) || defined (__cplusplus) || defined (PROTOTYPES)
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| 72 | # define __P(protos) protos
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| 73 | # else
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| 74 | # define __P(protos) ()
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| 75 | # endif
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| 76 | #endif
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| 77 |
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| 78 | /* Use Duff's device for good zeroing/copying performance. DO NOT call the
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| 79 | Duff's device macros with NBYTES == 0. */
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| 80 |
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| 81 | #define MALLOC_BZERO(charp, nbytes) \
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| 82 | do { \
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| 83 | if ((nbytes) <= 32) { \
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| 84 | size_t * mzp = (size_t *)(charp); \
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| 85 | unsigned long mctmp = (nbytes)/sizeof(size_t); \
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| 86 | long mcn; \
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| 87 | if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \
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| 88 | switch (mctmp) { \
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| 89 | case 0: for(;;) { *mzp++ = 0; \
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| 90 | case 7: *mzp++ = 0; \
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| 91 | case 6: *mzp++ = 0; \
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| 92 | case 5: *mzp++ = 0; \
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| 93 | case 4: *mzp++ = 0; \
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| 94 | case 3: *mzp++ = 0; \
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| 95 | case 2: *mzp++ = 0; \
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| 96 | case 1: *mzp++ = 0; if(mcn <= 0) break; mcn--; } \
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| 97 | } \
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| 98 | else \
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| 99 | memset ((charp), 0, (nbytes)); \
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| 100 | } while(0)
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| 101 |
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| 102 | #define MALLOC_ZERO(charp, nbytes) \
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| 103 | do { \
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| 104 | size_t mzsz = (nbytes); \
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| 105 | if (mzsz <= 9 * sizeof(mzsz) { \
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| 106 | size_t *mz = (size_t *)(charp); \
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| 107 | if(mzsz >= 5*sizeof(mzsz)) { *mz++ = 0; \
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| 108 | *mz++ = 0; \
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| 109 | if(mzsz >= 7*sizeof(mzsz)) { *mz++ = 0; \
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| 110 | *mz++ = 0; \
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| 111 | if(mzsz >= 9*sizeof(mzsz)) { *mz++ = 0; \
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| 112 | *mz++ = 0; }}} \
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| 113 | *mz++ = 0; \
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| 114 | *mz++ = 0; \
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| 115 | *mz = 0; \
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| 116 | } else \
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| 117 | memset ((charp), 0, mzsz); \
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| 118 | } while (0)
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| 119 |
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| 120 | #define MALLOC_MEMSET(charp, xch, nbytes) \
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| 121 | do { \
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| 122 | if ((nbytes) <= 32) { \
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| 123 | register char * mzp = (charp); \
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| 124 | unsigned long mctmp = (nbytes); \
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| 125 | register long mcn; \
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| 126 | if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \
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| 127 | switch (mctmp) { \
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| 128 | case 0: for(;;) { *mzp++ = xch; \
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| 129 | case 7: *mzp++ = xch; \
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| 130 | case 6: *mzp++ = xch; \
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| 131 | case 5: *mzp++ = xch; \
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| 132 | case 4: *mzp++ = xch; \
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| 133 | case 3: *mzp++ = xch; \
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| 134 | case 2: *mzp++ = xch; \
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| 135 | case 1: *mzp++ = xch; if(mcn <= 0) break; mcn--; } \
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| 136 | } \
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| 137 | } else \
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| 138 | memset ((charp), (xch), (nbytes)); \
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| 139 | } while(0)
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| 140 |
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| 141 | #define MALLOC_MEMCPY(dest,src,nbytes) \
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| 142 | do { \
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| 143 | if ((nbytes) <= 32) { \
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| 144 | size_t* mcsrc = (size_t*) src; \
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| 145 | size_t* mcdst = (size_t*) dest; \
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| 146 | unsigned long mctmp = (nbytes)/sizeof(size_t); \
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| 147 | long mcn; \
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| 148 | if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \
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| 149 | switch (mctmp) { \
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| 150 | case 0: for(;;) { *mcdst++ = *mcsrc++; \
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| 151 | case 7: *mcdst++ = *mcsrc++; \
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| 152 | case 6: *mcdst++ = *mcsrc++; \
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| 153 | case 5: *mcdst++ = *mcsrc++; \
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| 154 | case 4: *mcdst++ = *mcsrc++; \
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| 155 | case 3: *mcdst++ = *mcsrc++; \
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| 156 | case 2: *mcdst++ = *mcsrc++; \
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| 157 | case 1: *mcdst++ = *mcsrc++; if(mcn <= 0) break; mcn--; } \
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| 158 | } else \
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| 159 | memcpy ((dest), (src), (nbytes)) \
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| 160 | } while(0)
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| 161 |
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| 162 | #if defined (SHELL)
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| 163 | # include "bashintl.h"
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| 164 | #else
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| 165 | # define _(x) x
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| 166 | #endif
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| 167 |
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| 168 | #endif /* _IMALLOC_H */
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