| 1 | /* $Id: kLdrBase.h 3525 2007-08-19 22:14:55Z bird $ */
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| 2 | /** @file
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| 3 | *
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| 4 | * kLdr - The Dynamic Loader, Base Definitions and Typedefs.
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| 5 | *
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| 6 | * Copyright (c) 2006-2007 knut st. osmundsen <bird@anduin.net>
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| 7 | *
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| 8 | *
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| 9 | * This file is part of kLdr.
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| 10 | *
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| 11 | * kLdr is free software; you can redistribute it and/or modify
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| 12 | * it under the terms of the GNU General Public License as published by
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| 13 | * the Free Software Foundation; either version 2 of the License, or
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| 14 | * (at your option) any later version.
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| 15 | *
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| 16 | * kLdr is distributed in the hope that it will be useful,
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | * GNU General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU General Public License
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| 22 | * along with kLdr; if not, write to the Free Software
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| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 24 | *
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| 25 | */
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| 26 |
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| 27 | #ifndef ___kLdrBase_h___
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| 28 | #define ___kLdrBase_h___
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| 29 |
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| 30 |
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| 31 | /** @defgroup grp_kLdrBase kLdrBase - Base Definitions And Typedefs
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| 32 | * @{ */
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| 33 |
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| 34 | /*
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| 35 | * kLdr depend on size_t, [u]intNN_t, [u]intptr_t and some related constants.
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| 36 | * If KLDR_ALREADY_INCLUDED_STD_TYPES is defined, these has already been defined.
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| 37 | */
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| 38 | #ifndef KLDR_ALREADY_INCLUDED_STD_TYPES
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| 39 | # include <sys/types.h>
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| 40 | # include <stddef.h>
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| 41 | # ifdef _MSC_VER
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| 42 | typedef signed char int8_t;
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| 43 | typedef unsigned char uint8_t;
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| 44 | typedef signed short int16_t;
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| 45 | typedef unsigned short uint16_t;
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| 46 | typedef signed int int32_t;
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| 47 | typedef unsigned int uint32_t;
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| 48 | typedef signed __int64 int64_t;
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| 49 | typedef unsigned __int64 uint64_t;
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| 50 | typedef int64_t intmax_t;
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| 51 | typedef uint64_t uintmax_t;
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| 52 | # define UINT8_C(c) (c)
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| 53 | # define UINT16_C(c) (c)
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| 54 | # define UINT32_C(c) (c ## U)
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| 55 | # define UINT64_C(c) (c ## ULL)
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| 56 | # define INT8_C(c) (c)
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| 57 | # define INT16_C(c) (c)
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| 58 | # define INT32_C(c) (c)
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| 59 | # define INT64_C(c) (c ## LL)
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| 60 | # define INT8_MIN (INT8_C(-0x7f) - 1)
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| 61 | # define INT16_MIN (INT16_C(-0x7fff) - 1)
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| 62 | # define INT32_MIN (INT32_C(-0x7fffffff) - 1)
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| 63 | # define INT64_MIN (INT64_C(-0x7fffffffffffffff) - 1)
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| 64 | # define INT8_MAX INT8_C(0x7f)
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| 65 | # define INT16_MAX INT16_C(0x7fff)
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| 66 | # define INT32_MAX INT32_C(0x7fffffff)
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| 67 | # define INT64_MAX INT64_C(0x7fffffffffffffff)
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| 68 | # define UINT8_MAX UINT8_C(0xff)
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| 69 | # define UINT16_MAX UINT16_C(0xffff)
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| 70 | # define UINT32_MAX UINT32_C(0xffffffff)
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| 71 | # define UINT64_MAX UINT64_C(0xffffffffffffffff)
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| 72 | # else
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| 73 | # include <stdint.h>
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| 74 | # endif
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| 75 | #endif /* !KLDR_ALREADY_INCLUDED_STD_TYPES */
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| 76 |
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| 77 |
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| 78 | /** Get the minimum of two values. */
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| 79 | #define KLDR_MIN(a, b) ((a) <= (b) ? (a) : (b))
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| 80 | /** Get the maximum of two values. */
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| 81 | #define KLDR_MAX(a, b) ((a) >= (b) ? (a) : (b))
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| 82 | /** Calculate the offset of a structure member. */
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| 83 | #define KLDR_OFFSETOF(strct, memb) ( (size_t)( &((strct *)0)->memb ) )
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| 84 | /** Align a size_t value. */
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| 85 | #define KLDR_ALIGN_Z(val, align) ( ((val) + ((align) - 1)) & ~(size_t)((align) - 1) )
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| 86 | /** Align a void * value. */
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| 87 | #define KLDR_ALIGN_P(pv, align) ( (void *)( ((uintptr_t)(pv) + ((align) - 1)) & ~(uintptr_t)((align) - 1) ) )
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| 88 | /** Align a size_t value. */
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| 89 | #define KLDR_ALIGN_ADDR(val, align) ( ((val) + ((align) - 1)) & ~(KLDRADDR)((align) - 1) )
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| 90 | /** Number of elements in an array. */
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| 91 | #define KLDR_ELEMENTS(a) ( sizeof(a) / sizeof((a)[0]) )
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| 92 |
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| 93 |
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| 94 | /** @def KLDR_LITTLE_ENDIAN
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| 95 | * The kLdr build is for a little endian target. */
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| 96 | /** @def KLDR_BIG_ENDIAN
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| 97 | * The kLdr build is for a big endian target. */
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| 98 | #if !defined(KLDR_LITTLE_ENDIAN) && !defined(KLDR_BIG_ENDIAN)
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| 99 | # define KLDR_LITTLE_ENDIAN
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| 100 | #endif
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| 101 | #ifdef __DOXYGEN__
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| 102 | # define KLDR_BIG_ENDIAN
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| 103 | #endif
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| 104 |
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| 105 |
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| 106 | /** @name Endian Conversion
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| 107 | * @{ */
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| 108 |
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| 109 | /** @def KLDR_E2E_U16
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| 110 | * Convert the endian of an unsigned 16-bit value. */
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| 111 | # define KLDR_E2E_U16(u16) ( (uint16_t) (((u16) >> 8) | ((u16) << 8)) )
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| 112 | /** @def KLDR_E2E_U32
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| 113 | * Convert the endian of an unsigned 32-bit value. */
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| 114 | # define KLDR_E2E_U32(u32) ( ( ((u32) & UINT32_C(0xff000000)) >> 24 ) \
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| 115 | | ( ((u32) & UINT32_C(0x00ff0000)) >> 8 ) \
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| 116 | | ( ((u32) & UINT32_C(0x0000ff00)) << 8 ) \
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| 117 | | ( ((u32) & UINT32_C(0x000000ff)) << 24 ) \
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| 118 | )
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| 119 | /** @def KLDR_E2E_U64
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| 120 | * Convert the endian of an unsigned 64-bit value. */
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| 121 | # define KLDR_E2E_U64(u64) ( ( ((u64) & UINT64_C(0xff00000000000000)) >> 56 ) \
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| 122 | | ( ((u64) & UINT64_C(0x00ff000000000000)) >> 40 ) \
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| 123 | | ( ((u64) & UINT64_C(0x0000ff0000000000)) >> 24 ) \
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| 124 | | ( ((u64) & UINT64_C(0x000000ff00000000)) >> 8 ) \
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| 125 | | ( ((u64) & UINT64_C(0x00000000ff000000)) << 8 ) \
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| 126 | | ( ((u64) & UINT64_C(0x0000000000ff0000)) << 24 ) \
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| 127 | | ( ((u64) & UINT64_C(0x000000000000ff00)) << 40 ) \
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| 128 | | ( ((u64) & UINT64_C(0x00000000000000ff)) << 56 ) \
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| 129 | )
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| 130 |
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| 131 | /** @def KLDR_LE2H_U16
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| 132 | * Unsigned 16-bit little-endian to host endian. */
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| 133 | /** @def KLDR_LE2H_U32
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| 134 | * Unsigned 32-bit little-endian to host endian. */
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| 135 | /** @def KLDR_LE2H_U64
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| 136 | * Unsigned 64-bit little-endian to host endian. */
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| 137 | /** @def KLDR_BE2H_U16
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| 138 | * Unsigned 16-bit big-endian to host endian. */
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| 139 | /** @def KLDR_BE2H_U32
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| 140 | * Unsigned 32-bit big-endian to host endian. */
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| 141 | /** @def KLDR_BE2H_U64
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| 142 | * Unsigned 64-bit big-endian to host endian. */
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| 143 | #ifdef KLDR_LITTLE_ENDIAN
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| 144 | # define KLDR_LE2H_U16(u16) ((uint16_t)(u16))
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| 145 | # define KLDR_LE2H_U32(u32) ((uint32_t)(u32))
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| 146 | # define KLDR_LE2H_U64(u64) ((uint32_t)(u32))
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| 147 | # define KLDR_BE2H_U16(u16) KLDR_E2E_U16(u16)
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| 148 | # define KLDR_BE2H_U32(u32) KLDR_E2E_U32(u32)
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| 149 | # define KLDR_BE2H_U64(u64) KLDR_E2E_U64(u64)
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| 150 | #elif defined(KLDR_BIG_ENDIAN)
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| 151 | # define KLDR_LE2H_U16(u16) KLDR_E2E_U16(u16)
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| 152 | # define KLDR_LE2H_U32(u32) KLDR_E2E_U32(u32)
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| 153 | # define KLDR_LE2H_U32(u64) KLDR_E2E_U64(u64)
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| 154 | # define KLDR_BE2H_U16(u16) ((uint16_t)(u16))
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| 155 | # define KLDR_BE2H_U32(u32) ((uint32_t)(u32))
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| 156 | # define KLDR_BE2H_U64(u64) ((uint32_t)(u32))
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| 157 | #else
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| 158 | # error "KLDR_BIG_ENDIAN or KLDR_LITTLE_ENDIAN is supposed to be defined."
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| 159 | #endif
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| 160 |
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| 161 | /** @} */
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| 162 |
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| 163 | /** @} */
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| 164 |
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| 165 | #endif
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| 166 |
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