gl/printf-args.c

   1 /* Decomposed printf argument list.
   2    Copyright (C) 1999, 2002-2003, 2005-2007 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   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 along
  15    with this program; if not, write to the Free Software Foundation,
  16    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  17
  18 #include <config.h>
  19
  20 /* Specification.  */
  21 #include "printf-args.h"
  22
  23 #ifdef STATIC
  24 STATIC
  25 #endif
  26 int
  27 printf_fetchargs (va_list args, arguments *a)
  28 {
  29   size_t i;
  30   argument *ap;
  31
  32   for (i = 0, ap = &a->arg[0]; i < a->count; i++, ap++)
  33     switch (ap->type)
  34       {
  35       case TYPE_SCHAR:
  36         ap->a.a_schar = va_arg (args, /*signed char*/ int);
  37         break;
  38       case TYPE_UCHAR:
  39         ap->a.a_uchar = va_arg (args, /*unsigned char*/ int);
  40         break;
  41       case TYPE_SHORT:
  42         ap->a.a_short = va_arg (args, /*short*/ int);
  43         break;
  44       case TYPE_USHORT:
  45         ap->a.a_ushort = va_arg (args, /*unsigned short*/ int);
  46         break;
  47       case TYPE_INT:
  48         ap->a.a_int = va_arg (args, int);
  49         break;
  50       case TYPE_UINT:
  51         ap->a.a_uint = va_arg (args, unsigned int);
  52         break;
  53       case TYPE_LONGINT:
  54         ap->a.a_longint = va_arg (args, long int);
  55         break;
  56       case TYPE_ULONGINT:
  57         ap->a.a_ulongint = va_arg (args, unsigned long int);
  58         break;
  59 #if HAVE_LONG_LONG_INT
  60       case TYPE_LONGLONGINT:
  61         ap->a.a_longlongint = va_arg (args, long long int);
  62         break;
  63       case TYPE_ULONGLONGINT:
  64         ap->a.a_ulonglongint = va_arg (args, unsigned long long int);
  65         break;
  66 #endif
  67       case TYPE_DOUBLE:
  68         ap->a.a_double = va_arg (args, double);
  69         break;
  70       case TYPE_LONGDOUBLE:
  71         ap->a.a_longdouble = va_arg (args, long double);
  72         break;
  73       case TYPE_CHAR:
  74         ap->a.a_char = va_arg (args, int);
  75         break;
  76 #if HAVE_WINT_T
  77       case TYPE_WIDE_CHAR:
  78         /* Although ISO C 99 7.24.1.(2) says that wint_t is "unchanged by
  79            default argument promotions", this is not the case in mingw32,
  80            where wint_t is 'unsigned short'.  */
  81         ap->a.a_wide_char =
  82           (sizeof (wint_t) < sizeof (int)
  83            ? va_arg (args, int)
  84            : va_arg (args, wint_t));
  85         break;
  86 #endif
  87       case TYPE_STRING:
  88         ap->a.a_string = va_arg (args, const char *);
  89         /* A null pointer is an invalid argument for "%s", but in practice
  90            it occurs quite frequently in printf statements that produce
  91            debug output.  Use a fallback in this case.  */
  92         if (ap->a.a_string == NULL)
  93           ap->a.a_string = "(NULL)";
  94         break;
  95 #if HAVE_WCHAR_T
  96       case TYPE_WIDE_STRING:
  97         ap->a.a_wide_string = va_arg (args, const wchar_t *);
  98         /* A null pointer is an invalid argument for "%ls", but in practice
  99            it occurs quite frequently in printf statements that produce
 100            debug output.  Use a fallback in this case.  */
 101         if (ap->a.a_wide_string == NULL)
 102           {
 103             static const wchar_t wide_null_string[] =
 104               {
 105                 (wchar_t)'(',
 106                 (wchar_t)'N', (wchar_t)'U', (wchar_t)'L', (wchar_t)'L',
 107                 (wchar_t)')',
 108                 (wchar_t)0
 109               };
 110             ap->a.a_wide_string = wide_null_string;
 111           }
 112         break;
 113 #endif
 114       case TYPE_POINTER:
 115         ap->a.a_pointer = va_arg (args, void *);
 116         break;
 117       case TYPE_COUNT_SCHAR_POINTER:
 118         ap->a.a_count_schar_pointer = va_arg (args, signed char *);
 119         break;
 120       case TYPE_COUNT_SHORT_POINTER:
 121         ap->a.a_count_short_pointer = va_arg (args, short *);
 122         break;
 123       case TYPE_COUNT_INT_POINTER:
 124         ap->a.a_count_int_pointer = va_arg (args, int *);
 125         break;
 126       case TYPE_COUNT_LONGINT_POINTER:
 127         ap->a.a_count_longint_pointer = va_arg (args, long int *);
 128         break;
 129 #if HAVE_LONG_LONG_INT
 130       case TYPE_COUNT_LONGLONGINT_POINTER:
 131         ap->a.a_count_longlongint_pointer = va_arg (args, long long int *);
 132         break;
 133 #endif
 134       default:
 135         /* Unknown type.  */
 136         return -1;
 137       }
 138   return 0;
 139 }