lib/sysdep.h

   1 /*
   2  *      The PCI Library -- System-Dependent Stuff
   3  *
   4  *      Copyright (c) 1997--2004 Martin Mares <mj@ucw.cz>
   5  *
   6  *      Can be freely distributed and used under the terms of the GNU GPL.
   7  */
   8
   9 #ifdef __GNUC__
  10 #define UNUSED __attribute__((unused))
  11 #define NONRET __attribute__((noreturn))
  12 #else
  13 #define UNUSED
  14 #define NONRET
  15 #define inline
  16 #endif
  17
  18 typedef u8 byte;
  19 typedef u16 word;
  20
  21 #ifdef PCI_OS_WINDOWS
  22 #define strcasecmp strcmpi
  23 #endif
  24
  25 #ifdef PCI_HAVE_LINUX_BYTEORDER_H
  26
  27 #include <asm/byteorder.h>
  28 #define cpu_to_le16 __cpu_to_le16
  29 #define cpu_to_le32 __cpu_to_le32
  30 #define le16_to_cpu __le16_to_cpu
  31 #define le32_to_cpu __le32_to_cpu
  32
  33 #else
  34
  35 #ifdef PCI_OS_LINUX
  36 #include <endian.h>
  37 #define BYTE_ORDER __BYTE_ORDER
  38 #define BIG_ENDIAN __BIG_ENDIAN
  39 #endif
  40
  41 #ifdef PCI_OS_SUNOS
  42 #include <sys/byteorder.h>
  43 #if defined(__i386) && defined(LITTLE_ENDIAN)
  44 # define BYTE_ORDER LITTLE_ENDIAN
  45 #elif defined(__sparc) && defined(BIG_ENDIAN)
  46 # define BYTE_ORDER BIG_ENDIAN
  47 #else
  48 #define BIG_ENDIAN 4321
  49 #endif
  50 #ifndef BYTE_ORDER
  51 #ifdef _LITTLE_ENDIAN
  52 #define BYTE_ORDER 1234
  53 #else
  54 #define BYTE_ORDER 4321
  55 #endif
  56 #endif /* BYTE_ORDER */
  57 #endif /* PCI_OS_SUNOS */
  58
  59 #ifdef PCI_OS_WINDOWS
  60 #ifdef __MINGW32__
  61   #include <sys/param.h>
  62 #else
  63   #include <io.h>
  64   #define BIG_ENDIAN 4321
  65   #define LITTLE_ENDIAN 1234
  66   #define BYTE_ORDER LITTLE_ENDIAN
  67   #define snprintf _snprintf
  68 #endif
  69 #endif
  70
  71 #ifdef PCI_OS_DJGPP
  72   #define BIG_ENDIAN 4321
  73   #define LITTLE_ENDIAN 1234
  74   #define BYTE_ORDER LITTLE_ENDIAN
  75 #endif
  76
  77 #if !defined(BYTE_ORDER)
  78 #error "BYTE_ORDER not defined for your platform"
  79 #endif
  80
  81 #if BYTE_ORDER == BIG_ENDIAN
  82 #define cpu_to_le16 swab16
  83 #define cpu_to_le32 swab32
  84 #define le16_to_cpu swab16
  85 #define le32_to_cpu swab32
  86
  87 static inline word swab16(word w)
  88 {
  89   return (w << 8) | ((w >> 8) & 0xff);
  90 }
  91
  92 static inline u32 swab32(u32 w)
  93 {
  94   return ((w & 0xff000000) >> 24) |
  95          ((w & 0x00ff0000) >> 8) |
  96          ((w & 0x0000ff00) << 8)  |
  97          ((w & 0x000000ff) << 24);
  98 }
  99 #else
 100 #define cpu_to_le16(x) (x)
 101 #define cpu_to_le32(x) (x)
 102 #define le16_to_cpu(x) (x)
 103 #define le32_to_cpu(x) (x)
 104 #endif
 105
 106 #endif