stdio-common/reg-printf.c

   1 /* Copyright (C) 1991, 1996 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library 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 GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <errno.h>
  20 #include <limits.h>
  21 #include <printf.h>
  22
  23 /* Array of functions indexed by format character.  */
  24 static printf_function *printf_funcs[UCHAR_MAX + 1];
  25 printf_arginfo_function *__printf_arginfo_table[UCHAR_MAX + 1];
  26
  27 printf_function **__printf_function_table;
  28
  29 int __register_printf_function __P ((int, printf_function,
  30                                      printf_arginfo_function));
  31
  32 /* Register FUNC to be called to format SPEC specifiers.  */
  33 int
  34 __register_printf_function (spec, converter, arginfo)
  35      int spec;
  36      printf_function converter;
  37      printf_arginfo_function arginfo;
  38 {
  39   if (spec < 0 || spec > (int) UCHAR_MAX)
  40     {
  41       __set_errno (EINVAL);
  42       return -1;
  43     }
  44
  45   __printf_function_table = printf_funcs;
  46   __printf_arginfo_table[spec] = arginfo;
  47   printf_funcs[spec] = converter;
  48
  49   return 0;
  50 }
  51 weak_alias (__register_printf_function, register_printf_function)