mono/metadata/mono-endian.h

   1 /**
   2  * \file
   3  */
   4
   5 #ifndef _MONO_METADATA_ENDIAN_H_
   6 #define _MONO_METADATA_ENDIAN_H_ 1
   7
   8 #include <glib.h>
   9
  10 typedef union {
  11         guint32 ival;
  12         float fval;
  13 } mono_rfloat;
  14
  15 typedef union {
  16         guint64 ival;
  17         double fval;
  18         unsigned char cval [8];
  19 } mono_rdouble;
  20
  21 #if defined(__s390x__)
  22
  23 #define read16(x)       __builtin_bswap16(*((guint16 *)(x)))
  24 #define read32(x)       __builtin_bswap32(*((guint32 *)(x)))
  25 #define read64(x)       __builtin_bswap64(*((guint64 *)(x)))
  26
  27 #else
  28
  29 # if NO_UNALIGNED_ACCESS
  30
  31 guint16 mono_read16 (const unsigned char *x);
  32 guint32 mono_read32 (const unsigned char *x);
  33 guint64 mono_read64 (const unsigned char *x);
  34
  35 #define read16(x) (mono_read16 ((const unsigned char *)(x)))
  36 #define read32(x) (mono_read32 ((const unsigned char *)(x)))
  37 #define read64(x) (mono_read64 ((const unsigned char *)(x)))
  38
  39 # else
  40
  41 #define read16(x) GUINT16_FROM_LE (*((const guint16 *) (x)))
  42 #define read32(x) GUINT32_FROM_LE (*((const guint32 *) (x)))
  43 #define read64(x) GUINT64_FROM_LE (*((const guint64 *) (x)))
  44
  45 # endif
  46
  47 #endif
  48
  49 #define readr4(x,dest)  \
  50         do {    \
  51                 mono_rfloat mf; \
  52                 mf.ival = read32 ((x)); \
  53                 *(dest) = mf.fval;      \
  54         } while (0)
  55
  56 #define readr8(x,dest)  \
  57         do {    \
  58                 mono_rdouble mf;        \
  59                 mf.ival = read64 ((x)); \
  60                 *(dest) = mf.fval;      \
  61         } while (0)
  62
  63 #endif /* _MONO_METADATA_ENDIAN_H_ */