src/helper/types.h

   1 /***************************************************************************
   2  *   Copyright (C) 2004, 2005 by Dominic Rath                              *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifndef TYPES_H
  24 #define TYPES_H
  25
  26 #ifdef HAVE_SYS_TYPES_H
  27 #include <sys/types.h>
  28 #endif
  29 #ifdef HAVE_STDINT_H
  30 #include <stdint.h>
  31 #endif
  32 #ifdef HAVE_INTTYPES_H
  33 #include <inttypes.h>
  34 #endif
  35
  36 #ifdef HAVE_STDBOOL_H
  37 #include <stdbool.h>
  38 #else   /* HAVE_STDBOOL_H */
  39 #define __bool_true_false_are_defined 1
  40
  41 #ifndef HAVE__BOOL
  42 #ifndef __cplusplus
  43
  44 #define false   0
  45 #define true            1
  46
  47 typedef int _Bool;
  48 #else
  49 typedef bool _Bool;
  50 #endif  /* __cplusplus */
  51 #endif  /* HAVE__BOOL */
  52
  53 #define bool _Bool
  54
  55 #endif  /* HAVE_STDBOOL_H */
  56
  57 /// turns a macro argument into a string constant
  58 #define stringify(s) __stringify(s)
  59 #define __stringify(s) #s
  60
  61 /* DANGER!!!! here be dragons!
  62  *
  63  * Leave these fn's as byte accesses because it is safe
  64  * across architectures. Clever usage of 32 bit access
  65  * will create problems on some hosts.
  66  *
  67  * Note that the "buf" pointer in memory is probably unaligned.
  68  *
  69  * Were these functions to be re-written to take a 32 bit wide or 16 bit wide
  70  * memory access shortcut, then on some CPU's, i.e. ARM7, the 2 lsbytes of the address are
  71  * ignored for 32 bit access, whereas on other CPU's a 32 bit wide unaligned memory access
  72  * will cause an exception, and lastly on x86, an unaligned "greater than bytewide"
  73  * memory access works as if aligned.  So what follows below will work for all
  74  * platforms and gives the compiler leeway to do its own platform specific optimizations.
  75  *
  76  * Again, note that the "buf" pointer in memory is probably unaligned.
  77  */
  78
  79
  80 static inline uint32_t le_to_h_u32(const uint8_t* buf)
  81 {
  82         return (uint32_t)(buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
  83 }
  84
  85 static inline uint16_t le_to_h_u16(const uint8_t* buf)
  86 {
  87         return (uint16_t)(buf[0] | buf[1] << 8);
  88 }
  89
  90 static inline uint32_t be_to_h_u32(const uint8_t* buf)
  91 {
  92         return (uint32_t)(buf[3] | buf[2] << 8 | buf[1] << 16 | buf[0] << 24);
  93 }
  94
  95 static inline uint16_t be_to_h_u16(const uint8_t* buf)
  96 {
  97         return (uint16_t)(buf[1] | buf[0] << 8);
  98 }
  99
 100 static inline void h_u32_to_le(uint8_t* buf, int val)
 101 {
 102         buf[3] = (uint8_t) (val >> 24);
 103         buf[2] = (uint8_t) (val >> 16);
 104         buf[1] = (uint8_t) (val >> 8);
 105         buf[0] = (uint8_t) (val >> 0);
 106 }
 107
 108 static inline void h_u32_to_be(uint8_t* buf, int val)
 109 {
 110         buf[0] = (uint8_t) (val >> 24);
 111         buf[1] = (uint8_t) (val >> 16);
 112         buf[2] = (uint8_t) (val >> 8);
 113         buf[3] = (uint8_t) (val >> 0);
 114 }
 115
 116 static inline void h_u16_to_le(uint8_t* buf, int val)
 117 {
 118         buf[1] = (uint8_t) (val >> 8);
 119         buf[0] = (uint8_t) (val >> 0);
 120 }
 121
 122 static inline void h_u16_to_be(uint8_t* buf, int val)
 123 {
 124         buf[0] = (uint8_t) (val >> 8);
 125         buf[1] = (uint8_t) (val >> 0);
 126 }
 127
 128 #if defined(__ECOS)
 129
 130 /* eCos plain lacks these definition... A series of upstream patches
 131  * could probably repair it, but it seems like too much work to be
 132  * worth it.
 133  */
 134
 135 #if !defined(_STDINT_H)
 136 #define PRIx32 "x"
 137 #define PRId32 "d"
 138 #define SCNx32 "x"
 139 #define PRIi32 "i"
 140 #define PRIu32 "u"
 141
 142 typedef CYG_ADDRWORD intptr_t;
 143 typedef int64_t intmax_t;
 144 typedef uint64_t uintmax_t;
 145 #define INT8_MAX 0x7f
 146 #define INT8_MIN (-INT8_MAX - 1)
 147 # define UINT8_MAX              (255)
 148 #define INT16_MAX 0x7fff
 149 #define INT16_MIN (-INT16_MAX - 1)
 150 # define UINT16_MAX             (65535)
 151 #define INT32_MAX 0x7fffffffL
 152 #define INT32_MIN (-INT32_MAX - 1L)
 153 # define UINT32_MAX             (4294967295U)
 154 #define INT64_MAX 0x7fffffffffffffffLL
 155 #define INT64_MIN (-INT64_MAX - 1LL)
 156 #define UINT64_MAX (__CONCAT(INT64_MAX, U) * 2ULL + 1ULL)
 157 #endif
 158
 159     #ifndef LLONG_MAX
 160         #define ULLONG_MAX      UINT64_C(0xFFFFFFFFFFFFFFFF)
 161         #define LLONG_MAX       INT64_C(0x7FFFFFFFFFFFFFFF)
 162         #define LLONG_MIN       ULLONG_MAX
 163     #endif
 164
 165
 166 #define ULLONG_MAX 18446744073709551615
 167
 168 /* C99, eCos is C90 compliant (with bits of C99) */
 169 #define isblank(c) ((c) == ' ' || (c) == '\t')
 170
 171
 172 #endif
 173
 174 #endif /* TYPES_H */