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) 66