lib/ff-binary.h

   1 /*
   2  *      UCW Library -- Fast Buffered I/O on Binary Values
   3  *
   4  *      (c) 1997--2007 Martin Mares <mj@ucw.cz>
   5  *      (c) 2004 Robert Spalek <robert@ucw.cz>
   6  *
   7  *      This software may be freely distributed and used according to the terms
   8  *      of the GNU Lesser General Public License.
   9  */
  10
  11 #ifndef _UCW_FF_BINARY_H
  12 #define _UCW_FF_BINARY_H
  13
  14 #include "lib/fastbuf.h"
  15 #include "lib/unaligned.h"
  16
  17 #ifdef CPU_BIG_ENDIAN
  18 #define FF_ENDIAN be
  19 #else
  20 #define FF_ENDIAN le
  21 #endif
  22
  23 #define GET_FUNC(type, name, bits, endian)                      \
  24   type bget##name##_##endian##_slow(struct fastbuf *f);         \
  25   static inline type bget##name##_##endian(struct fastbuf *f)   \
  26   {                                                             \
  27     if (bavailr(f) >= bits/8)                                   \
  28       {                                                         \
  29         type w = get_u##bits##_##endian(f->bptr);               \
  30         f->bptr += bits/8;                                      \
  31         return w;                                               \
  32       }                                                         \
  33     else                                                        \
  34       return bget##name##_##endian##_slow(f);                   \
  35   }
  36
  37 #define PUT_FUNC(type, name, bits, endian)                      \
  38   void bput##name##_##endian##_slow(struct fastbuf *f, type x); \
  39   static inline void bput##name##_##endian(struct fastbuf *f, type x)   \
  40   {                                                             \
  41     if (bavailw(f) >= bits/8)                                   \
  42       {                                                         \
  43         put_u##bits##_##endian(f->bptr, x);                     \
  44         f->bptr += bits/8;                                      \
  45       }                                                         \
  46     else                                                        \
  47       return bput##name##_##endian##_slow(f, x);                \
  48   }
  49
  50 #define FF_ALL_X(type, name, bits, defendian)                   \
  51   GET_FUNC(type, name, bits, be)                                \
  52   GET_FUNC(type, name, bits, le)                                \
  53   PUT_FUNC(type, name, bits, be)                                \
  54   PUT_FUNC(type, name, bits, le)                                \
  55   static inline type bget##name(struct fastbuf *f) { return bget##name##_##defendian(f); }              \
  56   static inline void bput##name(struct fastbuf *f, type x) { bput##name##_##defendian(f, x); }
  57
  58 #define FF_ALL(type, name, bits, defendian) FF_ALL_X(type, name, bits, defendian)
  59
  60 FF_ALL(int, w, 16, FF_ENDIAN)
  61 FF_ALL(u32, l, 32, FF_ENDIAN)
  62 FF_ALL(u64, q, 64, FF_ENDIAN)
  63 FF_ALL(u64, 5, 40, FF_ENDIAN)
  64
  65 #undef GET_FUNC
  66 #undef PUT_FUNC
  67 #undef FF_ENDIAN
  68 #undef FF_ALL_X
  69 #undef FF_ALL
  70
  71 /* I/O on uintptr_t (only native endianity) */
  72
  73 #ifdef CPU_64BIT_POINTERS
  74 #define bputa(x,p) bputq(x,p)
  75 #define bgeta(x) bgetq(x)
  76 #else
  77 #define bputa(x,p) bputl(x,p)
  78 #define bgeta(x) bgetl(x)
  79 #endif
  80
  81 #endif