include/ctf/ctf-types-bitfield.h

   1 #ifndef _CTF_TYPES_BITFIELD_H
   2 #define _CTF_TYPES_BITFIELD_H
   3
   4 /*
   5  * Common Trace Format
   6  *
   7  * Bitfields read/write functions.
   8  *
   9  * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  10  *
  11  * Dual LGPL v2.1/GPL v2 license.
  12  */
  13
  14 #include <ctf/bitfield.h>
  15 #include <endian.h>
  16
  17 /*
  18  * ctf_bitfield_unsigned_read and ctf_bitfield_signed_read are defined by
  19  * bitfield.h.
  20  *
  21  * The write primitives below are provided as wrappers over
  22  * ctf_bitfield_write_le and ctf_bitfield_write_be to specify per-byte write of
  23  * signed/unsigned integers through a standard API.
  24  */
  25
  26 static inline
  27 size_t ctf_bitfield_unsigned_write(uint8_t *ptr,
  28                                    unsigned long start, unsigned long len,
  29                                    int byte_order, uint64_t v)
  30 {
  31         if (!ptr)
  32                 goto end;
  33         if (byte_order == LITTLE_ENDIAN)
  34                 ctf_bitfield_write_le(ptr, start, len, v);
  35         else
  36                 ctf_bitfield_write_be(ptr, start, len, v);
  37 end:
  38         return len;
  39 }
  40
  41 static inline
  42 size_t ctf_bitfield_signed_write(uint8_t *ptr,
  43                                  unsigned long start, unsigned long len,
  44                                  int byte_order, int64_t v)
  45 {
  46         if (!ptr)
  47                 goto end;
  48         if (byte_order == LITTLE_ENDIAN)
  49                 ctf_bitfield_write_le(ptr, start, len, v);
  50         else
  51                 ctf_bitfield_write_be(ptr, start, len, v);
  52 end:
  53         return len;
  54 }
  55
  56 #endif /* _CTF_TYPES_BITFIELD_H */