* include/arpa/nameser.h: Also optimize NS_PUT16 and NS_PUT32.
[glibc.git] / stdio-common / tst-rndseek.c
blobcf53aa48e0a1585f96c69a47cf6d1d70b184e24c
1 #include <errno.h>
2 #include <stdio.h>
3 #include <stdlib.h>
4 #include <unistd.h>
7 static char fname[] = "/tmp/rndseek.XXXXXX";
8 static char tempdata[65 * 1024];
11 static int do_test (void);
12 #define TEST_FUNCTION do_test ()
13 #define TIMEOUT 10
15 #include "../test-skeleton.c"
18 static int
19 fp_test (const char *name, FILE *fp)
21 int result = 0;
22 int rounds = 10000;
26 int idx = random () % (sizeof (tempdata) - 2);
27 char ch1;
28 char ch2;
30 if (fseek (fp, idx, SEEK_SET) != 0)
32 printf ("%s: %d: fseek failed: %m\n", name, rounds);
33 result = 1;
34 break;
37 ch1 = fgetc_unlocked (fp);
38 ch2 = tempdata[idx];
39 if (ch1 != ch2)
41 printf ("%s: %d: character at index %d not what is expected ('%c' vs '%c')\n",
42 name, rounds, idx, ch1, ch2);
43 result = 1;
44 break;
47 ch1 = fgetc (fp);
48 ch2 = tempdata[idx + 1];
49 if (ch1 != ch2)
51 printf ("%s: %d: character at index %d not what is expected ('%c' vs '%c')\n",
52 name, rounds, idx + 1, ch1, ch2);
53 result = 1;
54 break;
57 while (--rounds > 0);
59 fclose (fp);
61 return result;
65 static int
66 do_test (void)
68 int fd;
69 FILE *fp;
70 size_t i;
71 int result;
73 fd = mkstemp (fname);
74 if (fd == -1)
76 printf ("cannot open temporary file: %m\n");
77 return 1;
79 /* Make sure the file gets removed. */
80 add_temp_file (fname);
82 /* Repeatability demands this. */
83 srandom (42);
85 /* First create some temporary data. */
86 for (i = 0; i < sizeof (tempdata); ++i)
87 tempdata[i] = 'a' + random () % 26;
89 /* Write this data to a file. */
90 if (TEMP_FAILURE_RETRY (write (fd, tempdata, sizeof (tempdata)))
91 != sizeof (tempdata))
93 printf ("cannot wrote data to temporary file: %m\n");
94 return 1;
97 /* Now try reading the data. */
98 fp = fdopen (dup (fd), "r");
99 if (fp == NULL)
101 printf ("cannot duplicate temporary file descriptor: %m\n");
102 return 1;
105 rewind (fp);
106 for (i = 0; i < sizeof (tempdata); ++i)
108 int ch0 = fgetc (fp);
109 char ch1 = ch0;
110 char ch2 = tempdata[i];
112 if (ch0 == EOF)
114 puts ("premature end of file while reading data");
115 return 1;
118 if (ch1 != ch2)
120 printf ("%zd: '%c' vs '%c'\n", i, ch1, ch2);
121 return 1;
125 result = fp_test ("fdopen(\"r\")", fp);
127 fp = fopen (fname, "r");
128 result |= fp_test ("fopen(\"r\")", fp);
130 fp = fopen64 (fname, "r");
131 result |= fp_test ("fopen64(\"r\")", fp);
133 /* The "rw" mode will prevent the mmap-using code from being used. */
134 fp = fdopen (fd, "rw");
135 result = fp_test ("fdopen(\"rw\")", fp);
137 fp = fopen (fname, "rw");
138 result |= fp_test ("fopen(\"rw\")", fp);
140 fp = fopen64 (fname, "rw");
141 result |= fp_test ("fopen64(\"rw\")", fp);
143 return result;