libio/tst-memstream3.c

   1 /* Test for open_memstream implementation.
   2    Copyright (C) 2016-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   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.
   9
  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.
  14
  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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <mcheck.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <stdarg.h>
  24 #include <errno.h>
  25
  26
  27 #ifndef CHAR_T
  28 # define CHAR_T char
  29 # define W(o) o
  30 # define OPEN_MEMSTREAM open_memstream
  31 # define PRINTF printf
  32 # define FWRITE_FUNC fwrite
  33 # define FPUTC fputc
  34 # define STRCMP strcmp
  35 #endif
  36
  37 #define S(s) S1 (s)
  38 #define S1(s) #s
  39
  40 static void
  41 mcheck_abort (enum mcheck_status ev)
  42 {
  43   printf ("mecheck failed with status %d\n", (int) ev);
  44   exit (1);
  45 }
  46
  47 static void
  48 error_printf (int line, const char *fmt, ...)
  49 {
  50   va_list ap;
  51
  52   printf ("error: %s:%i: ", __FILE__, line);
  53   va_start (ap, fmt);
  54   vprintf (fmt, ap);
  55   va_end (ap);
  56 }
  57
  58 #define ERROR_RET1(...) \
  59   { error_printf(__LINE__, __VA_ARGS__); return 1; }
  60
  61 static int
  62 do_test_bz18241 (void)
  63 {
  64   CHAR_T *buf;
  65   size_t size;
  66
  67   FILE *fp = OPEN_MEMSTREAM (&buf, &size);
  68   if (fp == NULL)
  69     ERROR_RET1 ("%s failed\n", S(OPEN_MEMSTREAM));
  70
  71   if (FPUTC (W('a'), fp) != W('a'))
  72     ERROR_RET1 ("%s failed (errno = %d)\n", S(FPUTC), errno);
  73   if (fflush (fp) != 0)
  74     ERROR_RET1 ("fflush failed (errno = %d)\n", errno);
  75   if (fseek (fp, -2, SEEK_SET) != -1)
  76     ERROR_RET1 ("fseek failed (errno = %d)\n", errno);
  77   if (errno != EINVAL)
  78     ERROR_RET1 ("errno != EINVAL\n");
  79   if (ftell (fp) != 1)
  80     ERROR_RET1 ("ftell failed (errno = %d)\n", errno);
  81   if (ferror (fp) != 0)
  82     ERROR_RET1 ("ferror != 0\n");
  83
  84   if (fseek (fp, -1, SEEK_CUR) == -1)
  85     ERROR_RET1 ("fseek failed (errno = %d)\n", errno);
  86   if (ftell (fp) != 0)
  87     ERROR_RET1 ("ftell failed (errno = %d)\n", errno);
  88   if (ferror (fp) != 0)
  89     ERROR_RET1 ("ferror != 0\n");
  90   if (FPUTC (W('b'), fp) != W('b'))
  91     ERROR_RET1 ("%s failed (errno = %d)\n", S(FPUTC), errno);
  92   if (fflush (fp) != 0)
  93     ERROR_RET1 ("fflush failed (errno = %d)\n", errno);
  94
  95   if (fclose (fp) != 0)
  96     ERROR_RET1 ("fclose failed (errno = %d\n", errno);
  97
  98   if (STRCMP (buf, W("b")) != 0)
  99     ERROR_RET1 ("%s failed\n", S(STRCMP));
 100
 101   free (buf);
 102
 103   return 0;
 104 }
 105
 106 static int
 107 do_test_bz20181 (void)
 108 {
 109   CHAR_T *buf;
 110   size_t size;
 111   size_t ret;
 112
 113   FILE *fp = OPEN_MEMSTREAM (&buf, &size);
 114   if (fp == NULL)
 115     ERROR_RET1 ("%s failed\n", S(OPEN_MEMSTREAM));
 116
 117   if ((ret = FWRITE_FUNC (W("abc"), 1, 3, fp)) != 3)
 118     ERROR_RET1 ("%s failed (errno = %d)\n", S(FWRITE_FUNC), errno);
 119
 120   if (fseek (fp, 0, SEEK_SET) != 0)
 121     ERROR_RET1 ("fseek failed (errno = %d)\n", errno);
 122
 123   if (FWRITE_FUNC (W("z"), 1, 1, fp) != 1)
 124     ERROR_RET1 ("%s failed (errno = %d)\n", S(FWRITE_FUNC), errno);
 125
 126   if (fflush (fp) != 0)
 127     ERROR_RET1 ("fflush failed (errno = %d)\n", errno);
 128
 129   /* Avoid truncating the buffer on close.  */
 130   if (fseek (fp, 3, SEEK_SET) != 0)
 131     ERROR_RET1 ("fseek failed (errno = %d)\n", errno);
 132
 133   if (fclose (fp) != 0)
 134     ERROR_RET1 ("fclose failed (errno = %d\n", errno);
 135
 136   if (size != 3)
 137     ERROR_RET1 ("size != 3\n");
 138
 139   if (buf[0] != W('z')
 140       || buf[1] != W('b')
 141       || buf[2] != W('c'))
 142     {
 143       PRINTF (W("error: buf {%c,%c,%c} != {z,b,c}\n"),
 144               buf[0], buf[1], buf[2]);
 145       return 1;
 146     }
 147
 148   free (buf);
 149
 150   return 0;
 151 }
 152
 153 static int
 154 do_test (void)
 155 {
 156   int ret = 0;
 157
 158   mcheck_pedantic (mcheck_abort);
 159
 160   ret += do_test_bz18241 ();
 161   ret += do_test_bz20181 ();
 162
 163   return ret;
 164 }
 165
 166 #define TEST_FUNCTION do_test ()
 167 #include "../test-skeleton.c"