1 /* Decomposed printf argument list.
2    Copyright (C) 1999, 2002-2003, 2005-2007, 2009-2021 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 #ifdef STATIC
33 STATIC
34 #endif
35 int
PRINTF_FETCHARGS(va_list args,arguments * a)36 PRINTF_FETCHARGS (va_list args, arguments *a)
37 {
38   size_t i;
39   argument *ap;
40 
41   for (i = 0, ap = &a->arg[0]; i < a->count; i++, ap++)
42     switch (ap->type)
43       {
44       case TYPE_SCHAR:
45         ap->a.a_schar = va_arg (args, /*signed char*/ int);
46         break;
47       case TYPE_UCHAR:
48         ap->a.a_uchar = va_arg (args, /*unsigned char*/ int);
49         break;
50       case TYPE_SHORT:
51         ap->a.a_short = va_arg (args, /*short*/ int);
52         break;
53       case TYPE_USHORT:
54         ap->a.a_ushort = va_arg (args, /*unsigned short*/ int);
55         break;
56       case TYPE_INT:
57         ap->a.a_int = va_arg (args, int);
58         break;
59       case TYPE_UINT:
60         ap->a.a_uint = va_arg (args, unsigned int);
61         break;
62       case TYPE_LONGINT:
63         ap->a.a_longint = va_arg (args, long int);
64         break;
65       case TYPE_ULONGINT:
66         ap->a.a_ulongint = va_arg (args, unsigned long int);
67         break;
68       case TYPE_LONGLONGINT:
69         ap->a.a_longlongint = va_arg (args, long long int);
70         break;
71       case TYPE_ULONGLONGINT:
72         ap->a.a_ulonglongint = va_arg (args, unsigned long long int);
73         break;
74       case TYPE_DOUBLE:
75         ap->a.a_double = va_arg (args, double);
76         break;
77       case TYPE_LONGDOUBLE:
78         ap->a.a_longdouble = va_arg (args, long double);
79         break;
80       case TYPE_CHAR:
81         ap->a.a_char = va_arg (args, int);
82         break;
83 #if HAVE_WINT_T
84       case TYPE_WIDE_CHAR:
85         /* Although ISO C 99 7.24.1.(2) says that wint_t is "unchanged by
86            default argument promotions", this is not the case in mingw32,
87            where wint_t is 'unsigned short'.  */
88         ap->a.a_wide_char =
89           (sizeof (wint_t) < sizeof (int)
90            ? (wint_t) va_arg (args, int)
91            : va_arg (args, wint_t));
92         break;
93 #endif
94       case TYPE_STRING:
95         ap->a.a_string = va_arg (args, const char *);
96         /* A null pointer is an invalid argument for "%s", but in practice
97            it occurs quite frequently in printf statements that produce
98            debug output.  Use a fallback in this case.  */
99         if (ap->a.a_string == NULL)
100           ap->a.a_string = "(NULL)";
101         break;
102 #if HAVE_WCHAR_T
103       case TYPE_WIDE_STRING:
104         ap->a.a_wide_string = va_arg (args, const wchar_t *);
105         /* A null pointer is an invalid argument for "%ls", but in practice
106            it occurs quite frequently in printf statements that produce
107            debug output.  Use a fallback in this case.  */
108         if (ap->a.a_wide_string == NULL)
109           {
110             static const wchar_t wide_null_string[] =
111               {
112                 (wchar_t)'(',
113                 (wchar_t)'N', (wchar_t)'U', (wchar_t)'L', (wchar_t)'L',
114                 (wchar_t)')',
115                 (wchar_t)0
116               };
117             ap->a.a_wide_string = wide_null_string;
118           }
119         break;
120 #endif
121       case TYPE_POINTER:
122         ap->a.a_pointer = va_arg (args, void *);
123         break;
124       case TYPE_COUNT_SCHAR_POINTER:
125         ap->a.a_count_schar_pointer = va_arg (args, signed char *);
126         break;
127       case TYPE_COUNT_SHORT_POINTER:
128         ap->a.a_count_short_pointer = va_arg (args, short *);
129         break;
130       case TYPE_COUNT_INT_POINTER:
131         ap->a.a_count_int_pointer = va_arg (args, int *);
132         break;
133       case TYPE_COUNT_LONGINT_POINTER:
134         ap->a.a_count_longint_pointer = va_arg (args, long int *);
135         break;
136       case TYPE_COUNT_LONGLONGINT_POINTER:
137         ap->a.a_count_longlongint_pointer = va_arg (args, long long int *);
138         break;
139 #if ENABLE_UNISTDIO
140       /* The unistdio extensions.  */
141       case TYPE_U8_STRING:
142         ap->a.a_u8_string = va_arg (args, const uint8_t *);
143         /* A null pointer is an invalid argument for "%U", but in practice
144            it occurs quite frequently in printf statements that produce
145            debug output.  Use a fallback in this case.  */
146         if (ap->a.a_u8_string == NULL)
147           {
148             static const uint8_t u8_null_string[] =
149               { '(', 'N', 'U', 'L', 'L', ')', 0 };
150             ap->a.a_u8_string = u8_null_string;
151           }
152         break;
153       case TYPE_U16_STRING:
154         ap->a.a_u16_string = va_arg (args, const uint16_t *);
155         /* A null pointer is an invalid argument for "%lU", but in practice
156            it occurs quite frequently in printf statements that produce
157            debug output.  Use a fallback in this case.  */
158         if (ap->a.a_u16_string == NULL)
159           {
160             static const uint16_t u16_null_string[] =
161               { '(', 'N', 'U', 'L', 'L', ')', 0 };
162             ap->a.a_u16_string = u16_null_string;
163           }
164         break;
165       case TYPE_U32_STRING:
166         ap->a.a_u32_string = va_arg (args, const uint32_t *);
167         /* A null pointer is an invalid argument for "%llU", but in practice
168            it occurs quite frequently in printf statements that produce
169            debug output.  Use a fallback in this case.  */
170         if (ap->a.a_u32_string == NULL)
171           {
172             static const uint32_t u32_null_string[] =
173               { '(', 'N', 'U', 'L', 'L', ')', 0 };
174             ap->a.a_u32_string = u32_null_string;
175           }
176         break;
177 #endif
178       default:
179         /* Unknown type.  */
180         return -1;
181       }
182   return 0;
183 }
184