ensc_fmt/fmt-internal.h

   1 // $Id: fmt-internal.h 1647 2004-08-19 13:53:54Z ensc $    --*- c -*--
   2
   3 // Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; version 2 of the License.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with this program; if not, write to the Free Software
  16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18
  19 #ifndef H_UTIL_VSERVER_LIB_FMT_COMMON_H
  20 #define H_UTIL_VSERVER_LIB_FMT_COMMON_H
  21
  22 #define DIGITS                  "0123456789abcdefghijklmnopqrstuvwxyz"
  23
  24 #define FMT_P__(X,Y)            X ## Y
  25 #define FMT_P_(X,Y)             FMT_P__(X,Y)
  26 #define FMT_P(X)                FMT_P_(FMT_PREFIX, X)
  27
  28 #define CONCAT__(x,y,z)         x ## y ## z
  29 #define CONCAT_(x,y,z)          CONCAT__(x,y,z)
  30 #define CONCAT(x,z)             CONCAT_(x, FMT_BITSIZE, z)
  31
  32 #define FMT_FN(BASE,SZ)                                 \
  33   do {                                                  \
  34     register __typeof__(val)    v = val;                \
  35     register size_t             l = 0;                  \
  36                                                         \
  37     if (ptr==0) {                                       \
  38       do {                                              \
  39         ++l;                                            \
  40         v /= BASE;                                      \
  41       } while (v!=0);                                   \
  42     }                                                   \
  43     else {                                              \
  44       char                      buf[sizeof(val)*SZ];    \
  45                                                         \
  46       do {                                              \
  47         register unsigned int   d = v%BASE;             \
  48         v /= BASE;                                      \
  49         ++l;                                            \
  50         buf[sizeof(buf)-l] = DIGITS[d];                 \
  51       } while (v!=0);                                   \
  52                                                         \
  53       memcpy(ptr, buf+sizeof(buf)-l, l);                \
  54     }                                                   \
  55                                                         \
  56     return l;                                           \
  57   } while (0)
  58
  59
  60 #endif  //  H_UTIL_VSERVER_LIB_FMT_COMMON_H