Avoid insecure usage of tmpnam in tests.
[glibc.git] / stdio-common / tst-vfprintf-user-type.c
blob1ee86312d89e044d14d2879444f8e32c140c9fa7
1 /* Test for user-defined types in vfprintf.
2 Copyright (C) 2017-2018 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library 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 GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 /* This test contains a printf format specifier, %P, with a custom
20 type which is a long/double pair. If a precision is specified,
21 this indicates the number of such pairs which constitute the
22 argument. */
24 #include <locale.h>
25 #include <printf.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <support/check.h>
30 #include <support/support.h>
31 #include <support/test-driver.h>
32 #include <wchar.h>
34 /* Initialized by do_test using register_printf_type. */
35 static int user_type;
37 struct two_argument
39 long i;
40 double d;
43 static void
44 my_va_arg_function (void *mem, va_list *ap)
46 if (test_verbose > 0)
47 printf ("info: %s (%p) called\n", __func__, mem);
49 struct two_argument *pair = mem;
50 pair->i = va_arg (*ap, long);
51 pair->d = va_arg (*ap, double);
54 static int
55 my_printf_function (FILE *fp, const struct printf_info *info,
56 const void *const *args)
58 if (test_verbose > 0)
59 printf ("info: %s (%p, %p, {%p}@%p) called for %%%lc (prec %d)\n",
60 __func__, fp, info, args[0], args, (wint_t) info->spec,
61 info->prec);
63 TEST_VERIFY (info->spec == 'P');
64 size_t nargs;
65 int printed;
66 if (info->prec >= 0)
68 if (fputc ('{', fp) < 0)
69 return -1;
70 nargs = info->prec;
71 printed = 1;
73 else
75 nargs = 1;
76 printed = 0;
79 for (size_t i = 0; i < nargs; ++i)
81 if (i != 0)
83 if (fputc (',', fp) < 0)
84 return -1;
85 ++printed;
88 /* NB: Triple pointer indirection. ARGS is an array of void *,
89 and those pointers point to a pointer to the memory area
90 supplied to my_va_arg_function. */
91 struct two_argument *pair = *(void **) args[i];
92 int ret = fprintf (fp, "(%ld, %f)", pair->i, pair->d);
93 if (ret < 0)
94 return -1;
95 printed += ret;
97 if (info->prec >= 0)
99 if (fputc ('}', fp) < 0)
100 return -1;
101 ++printed;
103 return printed;
106 static int
107 my_arginfo_function (const struct printf_info *info,
108 size_t n, int *argtypes, int *size)
110 /* Avoid recursion. */
111 if (info->spec != 'P')
112 return -1;
113 if (test_verbose > 0)
114 printf ("info: %s (%p, %zu, %p, %p) called for %%%lc (prec %d)\n",
115 __func__, info, n, argtypes, size, (wint_t) info->spec,
116 info->prec);
118 TEST_VERIFY_EXIT (n >= 1);
119 size_t nargs;
120 if (info->prec >= 0)
121 nargs = info->prec;
122 else
123 nargs = 1;
125 size_t to_fill = nargs;
126 if (to_fill > n)
127 to_fill = n;
128 for (size_t i = 0; i < to_fill; ++i)
130 argtypes[i] = user_type;
131 size[i] = sizeof (struct two_argument);
133 if (test_verbose > 0)
134 printf ("info: %s return value: %zu\n", __func__, nargs);
135 return nargs;
138 static int
139 do_test (void)
141 user_type = register_printf_type (my_va_arg_function);
142 if (test_verbose > 0)
143 printf ("info: allocated user type: %d\n", user_type);
144 TEST_VERIFY_EXIT (user_type >= PA_LAST);
145 TEST_VERIFY_EXIT (register_printf_specifier
146 ('P', my_printf_function, my_arginfo_function) >= 0);
148 /* Alias declaration for asprintf, to avoid the format string
149 attribute and the associated warning. */
150 extern int asprintf_alias (char **, const char *, ...) __asm__ ("asprintf");
151 TEST_VERIFY (asprintf_alias == asprintf);
152 char *str = NULL;
153 TEST_VERIFY (asprintf_alias (&str, "[[%P]]", 123L, 456.0) >= 0);
154 if (test_verbose > 0)
155 printf ("info: %s\n", str);
156 TEST_VERIFY (strcmp (str, "[[(123, 456.000000)]]") == 0);
157 free (str);
159 str = NULL;
160 TEST_VERIFY (asprintf_alias (&str, "[[%1$P %1$P]]", 123L, 457.0) >= 0);
161 if (test_verbose > 0)
162 printf ("info: %s\n", str);
163 TEST_VERIFY (strcmp (str, "[[(123, 457.000000) (123, 457.000000)]]") == 0);
164 free (str);
166 str = NULL;
167 TEST_VERIFY (asprintf_alias (&str, "[[%.1P]]", 1L, 2.0) >= 0);
168 if (test_verbose > 0)
169 printf ("info: %s\n", str);
170 TEST_VERIFY (strcmp (str, "[[{(1, 2.000000)}]]") == 0);
171 free (str);
173 str = NULL;
174 TEST_VERIFY (asprintf_alias (&str, "[[%.2P]]", 1L, 2.0, 3L, 4.0) >= 0);
175 if (test_verbose > 0)
176 printf ("info: %s\n", str);
177 TEST_VERIFY (strcmp (str, "[[{(1, 2.000000),(3, 4.000000)}]]") == 0);
178 free (str);
180 str = NULL;
181 TEST_VERIFY (asprintf_alias
182 (&str, "[[%.2P | %.3P]]",
183 /* argument 1: */ 1L, 2.0, 3L, 4.0,
184 /* argument 2: */ 5L, 6.0, 7L, 8.0, 9L, 10.0)
185 >= 0);
186 if (test_verbose > 0)
187 printf ("info: %s\n", str);
188 TEST_VERIFY (strcmp (str,
189 "[["
190 "{(1, 2.000000),(3, 4.000000)}"
191 " | "
192 "{(5, 6.000000),(7, 8.000000),(9, 10.000000)}"
193 "]]") == 0);
194 free (str);
196 /* The following subtest fails due to bug 21534. */
197 #if 0
198 str = NULL;
199 TEST_VERIFY (asprintf_alias
200 (&str, "[[%1$.2P | %2$.3P | %1$.2P]]",
201 /* argument 1: */ 1L, 2.0, 3L, 4.0,
202 /* argument 2: */ 5L, 6.0, 7L, 8.0, 9L, 10.0)
203 >= 0);
204 if (test_verbose > 0)
205 printf ("info: %s\n", str);
206 TEST_VERIFY (strcmp (str,
207 "[["
208 "{(1, 2.000000),(3, 4.000000)}"
209 " | "
210 "{(5, 6.000000),(7, 8.000000),(9, 10.000000)}"
211 " | "
212 "{(1, 2.000000),(3, 4.000000)}"
213 "]]") == 0);
214 free (str);
215 #endif
217 return 0;
220 #include <support/test-driver.c>