1 /* Test of vasnprintf() and asnprintf() functions.
2 Copyright (C) 2007-2020 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 3 of the License, or
7 (at your option) 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
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
18
19 #include <config.h>
20
21 #include "vasnprintf.h"
22
23 #include <stdarg.h>
24 #include <stdlib.h>
25 #include <string.h>
26
27 #include "macros.h"
28
29 static void
test_function(char * (* my_asnprintf)(char *,size_t *,const char *,...))30 test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
31 {
32 char buf[8];
33 int size;
34
35 for (size = 0; size <= 8; size++)
36 {
37 size_t length = size;
38 char *result = my_asnprintf (NULL, &length, "%d", 12345);
39 ASSERT (result != NULL);
40 ASSERT (strcmp (result, "12345") == 0);
41 ASSERT (length == 5);
42 free (result);
43 }
44
45 for (size = 0; size <= 8; size++)
46 {
47 size_t length;
48 char *result;
49
50 memcpy (buf, "DEADBEEF", 8);
51 length = size;
52 result = my_asnprintf (buf, &length, "%d", 12345);
53 ASSERT (result != NULL);
54 ASSERT (strcmp (result, "12345") == 0);
55 ASSERT (length == 5);
56 if (size < 5 + 1)
57 ASSERT (result != buf);
58 ASSERT (memcmp (buf + size, &"DEADBEEF"[size], 8 - size) == 0);
59 if (result != buf)
60 free (result);
61 }
62
63 /* Note: This test assumes IEEE 754 representation of 'double' floats. */
64 for (size = 0; size <= 8; size++)
65 {
66 size_t length;
67 char *result;
68
69 memcpy (buf, "DEADBEEF", 8);
70 length = size;
71 result = my_asnprintf (buf, &length, "%2.0f", 1.6314159265358979e+125);
72 ASSERT (result != NULL);
73 /* The exact result and the result on glibc systems is
74 163141592653589790215729350939528493057529598899734151772468186268423257777068536614838678161083520756952076273094236944990208
75 On Cygwin, the result is
76 163141592653589790215729350939528493057529600000000000000000000000000000000000000000000000000000000000000000000000000000000000
77 On HP-UX 11.31 / hppa and IRIX 6.5, the result is
78 163141592653589790000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
79 */
80 ASSERT (strlen (result) == 126);
81 ASSERT (memcmp (result, "163141592653589790", 18) == 0);
82 ASSERT (length == 126);
83 if (size < 126 + 1)
84 ASSERT (result != buf);
85 ASSERT (memcmp (buf + size, &"DEADBEEF"[size], 8 - size) == 0);
86 if (result != buf)
87 free (result);
88 }
89 }
90
91 static char *
my_asnprintf(char * resultbuf,size_t * lengthp,const char * format,...)92 my_asnprintf (char *resultbuf, size_t *lengthp, const char *format, ...)
93 {
94 va_list args;
95 char *ret;
96
97 va_start (args, format);
98 ret = vasnprintf (resultbuf, lengthp, format, args);
99 va_end (args);
100 return ret;
101 }
102
103 static void
test_vasnprintf()104 test_vasnprintf ()
105 {
106 test_function (my_asnprintf);
107 }
108
109 static void
test_asnprintf()110 test_asnprintf ()
111 {
112 test_function (asnprintf);
113 }
114
115 int
main(int argc,char * argv[])116 main (int argc, char *argv[])
117 {
118 test_vasnprintf ();
119 test_asnprintf ();
120 return 0;
121 }
122