src/system/libroot/posix/glibc/stdio-common/reg-printf.c

   1 /* Copyright (C) 1991, 1996, 1997, 2002 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.
  18 */
  19
  20
  21 #include <stdio_private.h>
  22 #include <errno.h>
  23 #include <limits.h>
  24 #include <printf.h>
  25 #include <stddef.h>
  26 #include <stdlib.h>
  27
  28
  29 /* Array of functions indexed by format character.  */
  30 libc_freeres_ptr (printf_arginfo_function **__printf_arginfo_table)
  31   attribute_hidden;
  32 printf_function **__printf_function_table attribute_hidden;
  33
  34 int __register_printf_function __P ((int, printf_function,
  35                                      printf_arginfo_function));
  36
  37 /* Register FUNC to be called to format SPEC specifiers.  */
  38 int
  39 __register_printf_function (spec, converter, arginfo)
  40      int spec;
  41      printf_function converter;
  42      printf_arginfo_function arginfo;
  43 {
  44   if (spec < 0 || spec > (int) UCHAR_MAX)
  45     {
  46       __set_errno (EINVAL);
  47       return -1;
  48     }
  49
  50   if (__printf_function_table == NULL)
  51     {
  52       __printf_arginfo_table = (printf_arginfo_function **)
  53         malloc ((UCHAR_MAX + 1) * sizeof (void *) * 2);
  54       if (__printf_arginfo_table == NULL)
  55         return -1;
  56       __printf_function_table = (printf_function **)
  57         (__printf_arginfo_table + UCHAR_MAX + 1);
  58     }
  59
  60   __printf_function_table[spec] = converter;
  61   __printf_arginfo_table[spec] = arginfo;
  62
  63   return 0;
  64 }
  65 weak_alias (__register_printf_function, register_printf_function)