gl/printf-args.c

   1 /* Decomposed printf argument list.
   2    Copyright (C) 1999, 2002-2003, 2005-2006 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 #ifdef HAVE_CONFIG_H
  19 # include <config.h>
  20 #endif
  21
  22 /* Specification.  */
  23 #include "printf-args.h"
  24
  25 #ifdef STATIC
  26 STATIC
  27 #endif
  28 int
  29 printf_fetchargs (va_list args, arguments *a)
  30 {
  31   size_t i;
  32   argument *ap;
  33
  34   for (i = 0, ap = &a->arg[0]; i < a->count; i++, ap++)
  35     switch (ap->type)
  36       {
  37       case TYPE_SCHAR:
  38         ap->a.a_schar = va_arg (args, /*signed char*/ int);
  39         break;
  40       case TYPE_UCHAR:
  41         ap->a.a_uchar = va_arg (args, /*unsigned char*/ int);
  42         break;
  43       case TYPE_SHORT:
  44         ap->a.a_short = va_arg (args, /*short*/ int);
  45         break;
  46       case TYPE_USHORT:
  47         ap->a.a_ushort = va_arg (args, /*unsigned short*/ int);
  48         break;
  49       case TYPE_INT:
  50         ap->a.a_int = va_arg (args, int);
  51         break;
  52       case TYPE_UINT:
  53         ap->a.a_uint = va_arg (args, unsigned int);
  54         break;
  55       case TYPE_LONGINT:
  56         ap->a.a_longint = va_arg (args, long int);
  57         break;
  58       case TYPE_ULONGINT:
  59         ap->a.a_ulongint = va_arg (args, unsigned long int);
  60         break;
  61 #ifdef HAVE_LONG_LONG
  62       case TYPE_LONGLONGINT:
  63         ap->a.a_longlongint = va_arg (args, long long int);
  64         break;
  65       case TYPE_ULONGLONGINT:
  66         ap->a.a_ulonglongint = va_arg (args, unsigned long long int);
  67         break;
  68 #endif
  69       case TYPE_DOUBLE:
  70         ap->a.a_double = va_arg (args, double);
  71         break;
  72 #ifdef HAVE_LONG_DOUBLE
  73       case TYPE_LONGDOUBLE:
  74         ap->a.a_longdouble = va_arg (args, long double);
  75         break;
  76 #endif
  77       case TYPE_CHAR:
  78         ap->a.a_char = va_arg (args, int);
  79         break;
  80 #ifdef HAVE_WINT_T
  81       case TYPE_WIDE_CHAR:
  82         /* Although ISO C 99 7.24.1.(2) says that wint_t is "unchanged by
  83            default argument promotions", this is not the case in mingw32,
  84            where wint_t is 'unsigned short'.  */
  85         ap->a.a_wide_char =
  86           (sizeof (wint_t) < sizeof (int)
  87            ? va_arg (args, int)
  88            : va_arg (args, wint_t));
  89         break;
  90 #endif
  91       case TYPE_STRING:
  92         ap->a.a_string = va_arg (args, const char *);
  93         /* A null pointer is an invalid argument for "%s", but in practice
  94            it occurs quite frequently in printf statements that produce
  95            debug output.  Use a fallback in this case.  */
  96         if (ap->a.a_string == NULL)
  97           ap->a.a_string = "(NULL)";
  98         break;
  99 #ifdef HAVE_WCHAR_T
 100       case TYPE_WIDE_STRING:
 101         ap->a.a_wide_string = va_arg (args, const wchar_t *);
 102         /* A null pointer is an invalid argument for "%ls", but in practice
 103            it occurs quite frequently in printf statements that produce
 104            debug output.  Use a fallback in this case.  */
 105         if (ap->a.a_wide_string == NULL)
 106           {
 107             static const wchar_t wide_null_string[] =
 108               {
 109                 (wchar_t)'(',
 110                 (wchar_t)'N', (wchar_t)'U', (wchar_t)'L', (wchar_t)'L',
 111                 (wchar_t)')',
 112                 (wchar_t)0
 113               };
 114             ap->a.a_wide_string = wide_null_string;
 115           }
 116         break;
 117 #endif
 118       case TYPE_POINTER:
 119         ap->a.a_pointer = va_arg (args, void *);
 120         break;
 121       case TYPE_COUNT_SCHAR_POINTER:
 122         ap->a.a_count_schar_pointer = va_arg (args, signed char *);
 123         break;
 124       case TYPE_COUNT_SHORT_POINTER:
 125         ap->a.a_count_short_pointer = va_arg (args, short *);
 126         break;
 127       case TYPE_COUNT_INT_POINTER:
 128         ap->a.a_count_int_pointer = va_arg (args, int *);
 129         break;
 130       case TYPE_COUNT_LONGINT_POINTER:
 131         ap->a.a_count_longint_pointer = va_arg (args, long int *);
 132         break;
 133 #ifdef HAVE_LONG_LONG
 134       case TYPE_COUNT_LONGLONGINT_POINTER:
 135         ap->a.a_count_longlongint_pointer = va_arg (args, long long int *);
 136         break;
 137 #endif
 138       default:
 139         /* Unknown type.  */
 140         return -1;
 141       }
 142   return 0;
 143 }