1 /* Decomposed printf argument list.
2 Copyright (C) 1999, 2002-2003, 2005-2007, 2009-2019 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 Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1, 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 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License along
16 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 #include "g-gnulib.h"
28
29 /* Specification. */
30 #ifndef PRINTF_FETCHARGS
31 # include "printf-args.h"
32 #endif
33
34 #ifdef STATIC
35 STATIC
36 #endif
37 int
38 PRINTF_FETCHARGS (va_list args, arguments *a)
39 {
40 size_t i;
41 argument *ap;
42
43 for (i = 0, ap = &a->arg[0]; i < a->count; i++, ap++)
44 switch (ap->type)
45 {
46 case TYPE_SCHAR:
47 ap->a.a_schar = va_arg (args, /*signed char*/ int);
48 break;
49 case TYPE_UCHAR:
50 ap->a.a_uchar = va_arg (args, /*unsigned char*/ int);
51 break;
52 case TYPE_SHORT:
53 ap->a.a_short = va_arg (args, /*short*/ int);
54 break;
55 case TYPE_USHORT:
56 ap->a.a_ushort = va_arg (args, /*unsigned short*/ int);
57 break;
58 case TYPE_INT:
59 ap->a.a_int = va_arg (args, int);
60 break;
61 case TYPE_UINT:
62 ap->a.a_uint = va_arg (args, unsigned int);
63 break;
64 case TYPE_LONGINT:
65 ap->a.a_longint = va_arg (args, long int);
66 break;
67 case TYPE_ULONGINT:
68 ap->a.a_ulongint = va_arg (args, unsigned long int);
69 break;
70 #if HAVE_LONG_LONG
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 #endif
78 case TYPE_DOUBLE:
79 ap->a.a_double = va_arg (args, double);
80 break;
81 case TYPE_LONGDOUBLE:
82 ap->a.a_longdouble = va_arg (args, long double);
83 break;
84 case TYPE_CHAR:
85 ap->a.a_char = va_arg (args, int);
86 break;
87 #if HAVE_WINT_T
88 case TYPE_WIDE_CHAR:
89 /* Although ISO C 99 7.24.1.(2) says that wint_t is "unchanged by
90 default argument promotions", this is not the case in mingw32,
91 where wint_t is 'unsigned short'. */
92 ap->a.a_wide_char =
93 (sizeof (wint_t) < sizeof (int)
94 ? (wint_t) va_arg (args, int)
95 : va_arg (args, wint_t));
96 break;
97 #endif
98 case TYPE_STRING:
99 ap->a.a_string = va_arg (args, const char *);
100 /* A null pointer is an invalid argument for "%s", but in practice
101 it occurs quite frequently in printf statements that produce
102 debug output. Use a fallback in this case. */
103 if (ap->a.a_string == NULL)
104 ap->a.a_string = "(NULL)";
105 break;
106 #if HAVE_WCHAR_T
107 case TYPE_WIDE_STRING:
108 ap->a.a_wide_string = va_arg (args, const wchar_t *);
109 /* A null pointer is an invalid argument for "%ls", but in practice
110 it occurs quite frequently in printf statements that produce
111 debug output. Use a fallback in this case. */
112 if (ap->a.a_wide_string == NULL)
113 {
114 static const wchar_t wide_null_string[] =
115 {
116 (wchar_t)'(',
117 (wchar_t)'N', (wchar_t)'U', (wchar_t)'L', (wchar_t)'L',
118 (wchar_t)')',
119 (wchar_t)0
120 };
121 ap->a.a_wide_string = wide_null_string;
122 }
123 break;
124 #endif
125 case TYPE_POINTER:
126 ap->a.a_pointer = va_arg (args, void *);
127 break;
128 case TYPE_COUNT_SCHAR_POINTER:
129 ap->a.a_count_schar_pointer = va_arg (args, signed char *);
130 break;
131 case TYPE_COUNT_SHORT_POINTER:
132 ap->a.a_count_short_pointer = va_arg (args, short *);
133 break;
134 case TYPE_COUNT_INT_POINTER:
135 ap->a.a_count_int_pointer = va_arg (args, int *);
136 break;
137 case TYPE_COUNT_LONGINT_POINTER:
138 ap->a.a_count_longint_pointer = va_arg (args, long int *);
139 break;
140 #if HAVE_LONG_LONG
141 case TYPE_COUNT_LONGLONGINT_POINTER:
142 ap->a.a_count_longlongint_pointer = va_arg (args, long long int *);
143 break;
144 #endif
145 #if ENABLE_UNISTDIO
146 /* The unistdio extensions. */
147 case TYPE_U8_STRING:
148 ap->a.a_u8_string = va_arg (args, const uint8_t *);
149 /* A null pointer is an invalid argument for "%U", but in practice
150 it occurs quite frequently in printf statements that produce
151 debug output. Use a fallback in this case. */
152 if (ap->a.a_u8_string == NULL)
153 {
154 static const uint8_t u8_null_string[] =
155 { '(', 'N', 'U', 'L', 'L', ')', 0 };
156 ap->a.a_u8_string = u8_null_string;
157 }
158 break;
159 case TYPE_U16_STRING:
160 ap->a.a_u16_string = va_arg (args, const uint16_t *);
161 /* A null pointer is an invalid argument for "%lU", but in practice
162 it occurs quite frequently in printf statements that produce
163 debug output. Use a fallback in this case. */
164 if (ap->a.a_u16_string == NULL)
165 {
166 static const uint16_t u16_null_string[] =
167 { '(', 'N', 'U', 'L', 'L', ')', 0 };
168 ap->a.a_u16_string = u16_null_string;
169 }
170 break;
171 case TYPE_U32_STRING:
172 ap->a.a_u32_string = va_arg (args, const uint32_t *);
173 /* A null pointer is an invalid argument for "%llU", but in practice
174 it occurs quite frequently in printf statements that produce
175 debug output. Use a fallback in this case. */
176 if (ap->a.a_u32_string == NULL)
177 {
178 static const uint32_t u32_null_string[] =
179 { '(', 'N', 'U', 'L', 'L', ')', 0 };
180 ap->a.a_u32_string = u32_null_string;
181 }
182 break;
183 #endif
184 default:
185 /* Unknown type. */
186 return -1;
187 }
188 return 0;
189 }