gl/printf-args.c

   1 /* Decomposed printf argument list.
   2    Copyright (C) 1999, 2002-2003, 2005-2007, 2009-2010 Free Software
   3    Foundation, Inc.
   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; either version 3, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License along
  16    with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* This file can be parametrized with the following macros:
  20      ENABLE_UNISTDIO    Set to 1 to enable the unistdio extensions.
  21      PRINTF_FETCHARGS   Name of the function to be defined.
  22      STATIC             Set to 'static' to declare the function static.  */
  23
  24 #ifndef PRINTF_FETCHARGS
  25 # include <config.h>
  26 #endif
  27
  28 /* Specification.  */
  29 #ifndef PRINTF_FETCHARGS
  30 # include "printf-args.h"
  31 #endif
  32
  33 #ifdef STATIC
  34 STATIC
  35 #endif
  36 int
  37 PRINTF_FETCHARGS (va_list args, arguments *a)
  38 {
  39   size_t i;
  40   argument *ap;
  41
  42   for (i = 0, ap = &a->arg[0]; i < a->count; i++, ap++)
  43     switch (ap->type)
  44       {
  45       case TYPE_SCHAR:
  46         ap->a.a_schar = va_arg (args, /*signed char*/ int);
  47         break;
  48       case TYPE_UCHAR:
  49         ap->a.a_uchar = va_arg (args, /*unsigned char*/ int);
  50         break;
  51       case TYPE_SHORT:
  52         ap->a.a_short = va_arg (args, /*short*/ int);
  53         break;
  54       case TYPE_USHORT:
  55         ap->a.a_ushort = va_arg (args, /*unsigned short*/ int);
  56         break;
  57       case TYPE_INT:
  58         ap->a.a_int = va_arg (args, int);
  59         break;
  60       case TYPE_UINT:
  61         ap->a.a_uint = va_arg (args, unsigned int);
  62         break;
  63       case TYPE_LONGINT:
  64         ap->a.a_longint = va_arg (args, long int);
  65         break;
  66       case TYPE_ULONGINT:
  67         ap->a.a_ulongint = va_arg (args, unsigned long int);
  68         break;
  69 #if HAVE_LONG_LONG_INT
  70       case TYPE_LONGLONGINT:
  71         ap->a.a_longlongint = va_arg (args, long long int);
  72         break;
  73       case TYPE_ULONGLONGINT:
  74         ap->a.a_ulonglongint = va_arg (args, unsigned long long int);
  75         break;
  76 #endif
  77       case TYPE_DOUBLE:
  78         ap->a.a_double = va_arg (args, double);
  79         break;
  80       case TYPE_LONGDOUBLE:
  81         ap->a.a_longdouble = va_arg (args, long double);
  82         break;
  83       case TYPE_CHAR:
  84         ap->a.a_char = va_arg (args, int);
  85         break;
  86 #if HAVE_WINT_T
  87       case TYPE_WIDE_CHAR:
  88         /* Although ISO C 99 7.24.1.(2) says that wint_t is "unchanged by
  89            default argument promotions", this is not the case in mingw32,
  90            where wint_t is 'unsigned short'.  */
  91         ap->a.a_wide_char =
  92           (sizeof (wint_t) < sizeof (int)
  93            ? (wint_t) va_arg (args, int)
  94            : va_arg (args, wint_t));
  95         break;
  96 #endif
  97       case TYPE_STRING:
  98         ap->a.a_string = va_arg (args, const char *);
  99         /* A null pointer is an invalid argument for "%s", but in practice
 100            it occurs quite frequently in printf statements that produce
 101            debug output.  Use a fallback in this case.  */
 102         if (ap->a.a_string == NULL)
 103           ap->a.a_string = "(NULL)";
 104         break;
 105 #if HAVE_WCHAR_T
 106       case TYPE_WIDE_STRING:
 107         ap->a.a_wide_string = va_arg (args, const wchar_t *);
 108         /* A null pointer is an invalid argument for "%ls", but in practice
 109            it occurs quite frequently in printf statements that produce
 110            debug output.  Use a fallback in this case.  */
 111         if (ap->a.a_wide_string == NULL)
 112           {
 113             static const wchar_t wide_null_string[] =
 114               {
 115                 (wchar_t)'(',
 116                 (wchar_t)'N', (wchar_t)'U', (wchar_t)'L', (wchar_t)'L',
 117                 (wchar_t)')',
 118                 (wchar_t)0
 119               };
 120             ap->a.a_wide_string = wide_null_string;
 121           }
 122         break;
 123 #endif
 124       case TYPE_POINTER:
 125         ap->a.a_pointer = va_arg (args, void *);
 126         break;
 127       case TYPE_COUNT_SCHAR_POINTER:
 128         ap->a.a_count_schar_pointer = va_arg (args, signed char *);
 129         break;
 130       case TYPE_COUNT_SHORT_POINTER:
 131         ap->a.a_count_short_pointer = va_arg (args, short *);
 132         break;
 133       case TYPE_COUNT_INT_POINTER:
 134         ap->a.a_count_int_pointer = va_arg (args, int *);
 135         break;
 136       case TYPE_COUNT_LONGINT_POINTER:
 137         ap->a.a_count_longint_pointer = va_arg (args, long int *);
 138         break;
 139 #if HAVE_LONG_LONG_INT
 140       case TYPE_COUNT_LONGLONGINT_POINTER:
 141         ap->a.a_count_longlongint_pointer = va_arg (args, long long int *);
 142         break;
 143 #endif
 144 #if ENABLE_UNISTDIO
 145       /* The unistdio extensions.  */
 146       case TYPE_U8_STRING:
 147         ap->a.a_u8_string = va_arg (args, const uint8_t *);
 148         /* A null pointer is an invalid argument for "%U", but in practice
 149            it occurs quite frequently in printf statements that produce
 150            debug output.  Use a fallback in this case.  */
 151         if (ap->a.a_u8_string == NULL)
 152           {
 153             static const uint8_t u8_null_string[] =
 154               { '(', 'N', 'U', 'L', 'L', ')', 0 };
 155             ap->a.a_u8_string = u8_null_string;
 156           }
 157         break;
 158       case TYPE_U16_STRING:
 159         ap->a.a_u16_string = va_arg (args, const uint16_t *);
 160         /* A null pointer is an invalid argument for "%lU", but in practice
 161            it occurs quite frequently in printf statements that produce
 162            debug output.  Use a fallback in this case.  */
 163         if (ap->a.a_u16_string == NULL)
 164           {
 165             static const uint16_t u16_null_string[] =
 166               { '(', 'N', 'U', 'L', 'L', ')', 0 };
 167             ap->a.a_u16_string = u16_null_string;
 168           }
 169         break;
 170       case TYPE_U32_STRING:
 171         ap->a.a_u32_string = va_arg (args, const uint32_t *);
 172         /* A null pointer is an invalid argument for "%llU", but in practice
 173            it occurs quite frequently in printf statements that produce
 174            debug output.  Use a fallback in this case.  */
 175         if (ap->a.a_u32_string == NULL)
 176           {
 177             static const uint32_t u32_null_string[] =
 178               { '(', 'N', 'U', 'L', 'L', ')', 0 };
 179             ap->a.a_u32_string = u32_null_string;
 180           }
 181         break;
 182 #endif
 183       default:
 184         /* Unknown type.  */
 185         return -1;
 186       }
 187   return 0;
 188 }