lib/printf-args.c

   1 /* Decomposed printf argument list.
   2    Copyright (C) 1999, 2002-2003, 2005-2007, 2009-2024 Free Software
   3    Foundation, Inc.
   4
   5    This file is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9
  10    This file 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 Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 /* This file can be parametrized with the following macros:
  19      ENABLE_UNISTDIO    Set to 1 to enable the unistdio extensions.
  20      PRINTF_FETCHARGS   Name of the function to be defined.
  21      STATIC             Set to 'static' to declare the function static.  */
  22
  23 #ifndef PRINTF_FETCHARGS
  24 # include <config.h>
  25 #endif
  26
  27 /* Specification.  */
  28 #ifndef PRINTF_FETCHARGS
  29 # include "printf-args.h"
  30 #endif
  31
  32 /* Get INT_WIDTH.  */
  33 #include <limits.h>
  34
  35 #ifdef STATIC
  36 STATIC
  37 #endif
  38 int
  39 PRINTF_FETCHARGS (va_list args, arguments *a)
  40 {
  41   size_t i;
  42   argument *ap;
  43
  44   for (i = 0, ap = &a->arg[0]; i < a->count; i++, ap++)
  45     switch (ap->type)
  46       {
  47       case TYPE_SCHAR:
  48         ap->a.a_schar = va_arg (args, /*signed char*/ int);
  49         break;
  50       case TYPE_UCHAR:
  51         ap->a.a_uchar = va_arg (args, /*unsigned char*/ int);
  52         break;
  53       case TYPE_SHORT:
  54         ap->a.a_short = va_arg (args, /*short*/ int);
  55         break;
  56       case TYPE_USHORT:
  57         ap->a.a_ushort = va_arg (args, /*unsigned short*/ int);
  58         break;
  59       case TYPE_INT:
  60         ap->a.a_int = va_arg (args, int);
  61         break;
  62       case TYPE_UINT:
  63         ap->a.a_uint = va_arg (args, unsigned int);
  64         break;
  65       case TYPE_LONGINT:
  66         ap->a.a_longint = va_arg (args, long int);
  67         break;
  68       case TYPE_ULONGINT:
  69         ap->a.a_ulongint = va_arg (args, unsigned long int);
  70         break;
  71       case TYPE_LONGLONGINT:
  72         ap->a.a_longlongint = va_arg (args, long long int);
  73         break;
  74       case TYPE_ULONGLONGINT:
  75         ap->a.a_ulonglongint = va_arg (args, unsigned long long int);
  76         break;
  77       case TYPE_INT8_T:
  78         #if INT8_WIDTH < INT_WIDTH
  79         ap->a.a_int8_t = va_arg (args, /* int8_t */ int);
  80         #else
  81         ap->a.a_int8_t = va_arg (args, int8_t);
  82         #endif
  83         break;
  84       case TYPE_UINT8_T:
  85         #if UINT8_WIDTH < INT_WIDTH
  86         ap->a.a_uint8_t = va_arg (args, /* uint8_t */ int);
  87         #else
  88         ap->a.a_uint8_t = va_arg (args, uint8_t);
  89         #endif
  90         break;
  91       case TYPE_INT16_T:
  92         #if INT16_WIDTH < INT_WIDTH
  93         ap->a.a_int16_t = va_arg (args, /* int16_t */ int);
  94         #else
  95         ap->a.a_int16_t = va_arg (args, int16_t);
  96         #endif
  97         break;
  98       case TYPE_UINT16_T:
  99         #if UINT16_WIDTH < INT_WIDTH
 100         ap->a.a_uint16_t = va_arg (args, /* uint16_t */ int);
 101         #else
 102         ap->a.a_uint16_t = va_arg (args, uint16_t);
 103         #endif
 104         break;
 105       case TYPE_INT32_T:
 106         #if INT32_WIDTH < INT_WIDTH
 107         ap->a.a_int32_t = va_arg (args, /* int32_t */ int);
 108         #else
 109         ap->a.a_int32_t = va_arg (args, int32_t);
 110         #endif
 111         break;
 112       case TYPE_UINT32_T:
 113         #if UINT32_WIDTH < INT_WIDTH
 114         ap->a.a_uint32_t = va_arg (args, /* uint32_t */ int);
 115         #else
 116         ap->a.a_uint32_t = va_arg (args, uint32_t);
 117         #endif
 118         break;
 119       case TYPE_INT64_T:
 120         ap->a.a_int64_t = va_arg (args, int64_t);
 121         break;
 122       case TYPE_UINT64_T:
 123         ap->a.a_uint64_t = va_arg (args, uint64_t);
 124         break;
 125       case TYPE_INT_FAST8_T:
 126         #if INT_FAST8_WIDTH < INT_WIDTH
 127         ap->a.a_int_fast8_t = va_arg (args, /* int_fast8_t */ int);
 128         #else
 129         ap->a.a_int_fast8_t = va_arg (args, int_fast8_t);
 130         #endif
 131         break;
 132       case TYPE_UINT_FAST8_T:
 133         #if UINT_FAST8_WIDTH < INT_WIDTH
 134         ap->a.a_uint_fast8_t = va_arg (args, /* uint_fast8_t */ int);
 135         #else
 136         ap->a.a_uint_fast8_t = va_arg (args, uint_fast8_t);
 137         #endif
 138         break;
 139       case TYPE_INT_FAST16_T:
 140         #if INT_FAST16_WIDTH < INT_WIDTH
 141         ap->a.a_int_fast16_t = va_arg (args, /* int_fast16_t */ int);
 142         #else
 143         ap->a.a_int_fast16_t = va_arg (args, int_fast16_t);
 144         #endif
 145         break;
 146       case TYPE_UINT_FAST16_T:
 147         #if UINT_FAST16_WIDTH < INT_WIDTH
 148         ap->a.a_uint_fast16_t = va_arg (args, /* uint_fast16_t */ int);
 149         #else
 150         ap->a.a_uint_fast16_t = va_arg (args, uint_fast16_t);
 151         #endif
 152         break;
 153       case TYPE_INT_FAST32_T:
 154         #if INT_FAST32_WIDTH < INT_WIDTH
 155         ap->a.a_int_fast32_t = va_arg (args, /* int_fast32_t */ int);
 156         #else
 157         ap->a.a_int_fast32_t = va_arg (args, int_fast32_t);
 158         #endif
 159         break;
 160       case TYPE_UINT_FAST32_T:
 161         #if UINT_FAST32_WIDTH < INT_WIDTH
 162         ap->a.a_uint_fast32_t = va_arg (args, /* uint_fast32_t */ int);
 163         #else
 164         ap->a.a_uint_fast32_t = va_arg (args, uint_fast32_t);
 165         #endif
 166         break;
 167       case TYPE_INT_FAST64_T:
 168         ap->a.a_int_fast64_t = va_arg (args, int_fast64_t);
 169         break;
 170       case TYPE_UINT_FAST64_T:
 171         ap->a.a_uint_fast64_t = va_arg (args, uint_fast64_t);
 172         break;
 173       case TYPE_DOUBLE:
 174         ap->a.a_double = va_arg (args, double);
 175         break;
 176       case TYPE_LONGDOUBLE:
 177         ap->a.a_longdouble = va_arg (args, long double);
 178         break;
 179       case TYPE_CHAR:
 180         ap->a.a_char = va_arg (args, int);
 181         break;
 182 #if HAVE_WINT_T
 183       case TYPE_WIDE_CHAR:
 184         /* Although ISO C 99 7.24.1.(2) says that wint_t is "unchanged by
 185            default argument promotions", this is not the case in mingw32,
 186            where wint_t is 'unsigned short'.  */
 187         ap->a.a_wide_char =
 188           (sizeof (wint_t) < sizeof (int)
 189            ? (wint_t) va_arg (args, int)
 190            : va_arg (args, wint_t));
 191         break;
 192 #endif
 193       case TYPE_STRING:
 194         ap->a.a_string = va_arg (args, const char *);
 195         /* A null pointer is an invalid argument for "%s", but in practice
 196            it occurs quite frequently in printf statements that produce
 197            debug output.  Use a fallback in this case.  */
 198         if (ap->a.a_string == NULL)
 199           ap->a.a_string = "(NULL)";
 200         break;
 201       case TYPE_WIDE_STRING:
 202         ap->a.a_wide_string = va_arg (args, const wchar_t *);
 203         /* A null pointer is an invalid argument for "%ls", but in practice
 204            it occurs quite frequently in printf statements that produce
 205            debug output.  Use a fallback in this case.  */
 206         if (ap->a.a_wide_string == NULL)
 207           {
 208             static const wchar_t wide_null_string[] =
 209               {
 210                 (wchar_t)'(',
 211                 (wchar_t)'N', (wchar_t)'U', (wchar_t)'L', (wchar_t)'L',
 212                 (wchar_t)')',
 213                 (wchar_t)0
 214               };
 215             ap->a.a_wide_string = wide_null_string;
 216           }
 217         break;
 218       case TYPE_POINTER:
 219         ap->a.a_pointer = va_arg (args, void *);
 220         break;
 221       case TYPE_COUNT_SCHAR_POINTER:
 222         ap->a.a_count_schar_pointer = va_arg (args, signed char *);
 223         break;
 224       case TYPE_COUNT_SHORT_POINTER:
 225         ap->a.a_count_short_pointer = va_arg (args, short *);
 226         break;
 227       case TYPE_COUNT_INT_POINTER:
 228         ap->a.a_count_int_pointer = va_arg (args, int *);
 229         break;
 230       case TYPE_COUNT_LONGINT_POINTER:
 231         ap->a.a_count_longint_pointer = va_arg (args, long int *);
 232         break;
 233       case TYPE_COUNT_LONGLONGINT_POINTER:
 234         ap->a.a_count_longlongint_pointer = va_arg (args, long long int *);
 235         break;
 236       case TYPE_COUNT_INT8_T_POINTER:
 237         ap->a.a_count_int8_t_pointer = va_arg (args, int8_t *);
 238         break;
 239       case TYPE_COUNT_INT16_T_POINTER:
 240         ap->a.a_count_int16_t_pointer = va_arg (args, int16_t *);
 241         break;
 242       case TYPE_COUNT_INT32_T_POINTER:
 243         ap->a.a_count_int32_t_pointer = va_arg (args, int32_t *);
 244         break;
 245       case TYPE_COUNT_INT64_T_POINTER:
 246         ap->a.a_count_int64_t_pointer = va_arg (args, int64_t *);
 247         break;
 248       case TYPE_COUNT_INT_FAST8_T_POINTER:
 249         ap->a.a_count_int_fast8_t_pointer = va_arg (args, int_fast8_t *);
 250         break;
 251       case TYPE_COUNT_INT_FAST16_T_POINTER:
 252         ap->a.a_count_int_fast16_t_pointer = va_arg (args, int_fast16_t *);
 253         break;
 254       case TYPE_COUNT_INT_FAST32_T_POINTER:
 255         ap->a.a_count_int_fast32_t_pointer = va_arg (args, int_fast32_t *);
 256         break;
 257       case TYPE_COUNT_INT_FAST64_T_POINTER:
 258         ap->a.a_count_int_fast64_t_pointer = va_arg (args, int_fast64_t *);
 259         break;
 260 #if ENABLE_UNISTDIO
 261       /* The unistdio extensions.  */
 262       case TYPE_U8_STRING:
 263         ap->a.a_u8_string = va_arg (args, const uint8_t *);
 264         /* A null pointer is an invalid argument for "%U", but in practice
 265            it occurs quite frequently in printf statements that produce
 266            debug output.  Use a fallback in this case.  */
 267         if (ap->a.a_u8_string == NULL)
 268           {
 269             static const uint8_t u8_null_string[] =
 270               { '(', 'N', 'U', 'L', 'L', ')', 0 };
 271             ap->a.a_u8_string = u8_null_string;
 272           }
 273         break;
 274       case TYPE_U16_STRING:
 275         ap->a.a_u16_string = va_arg (args, const uint16_t *);
 276         /* A null pointer is an invalid argument for "%lU", but in practice
 277            it occurs quite frequently in printf statements that produce
 278            debug output.  Use a fallback in this case.  */
 279         if (ap->a.a_u16_string == NULL)
 280           {
 281             static const uint16_t u16_null_string[] =
 282               { '(', 'N', 'U', 'L', 'L', ')', 0 };
 283             ap->a.a_u16_string = u16_null_string;
 284           }
 285         break;
 286       case TYPE_U32_STRING:
 287         ap->a.a_u32_string = va_arg (args, const uint32_t *);
 288         /* A null pointer is an invalid argument for "%llU", but in practice
 289            it occurs quite frequently in printf statements that produce
 290            debug output.  Use a fallback in this case.  */
 291         if (ap->a.a_u32_string == NULL)
 292           {
 293             static const uint32_t u32_null_string[] =
 294               { '(', 'N', 'U', 'L', 'L', ')', 0 };
 295             ap->a.a_u32_string = u32_null_string;
 296           }
 297         break;
 298 #endif
 299       default:
 300         /* Unknown type.  */
 301         return -1;
 302       }
 303   return 0;
 304 }