Blame stdio-common/test-fwrite.c

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#include <stdio.h>
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#include <string.h>
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static int
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do_test (void)
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{
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  FILE *f = tmpfile ();
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  char obuf[99999], ibuf[sizeof obuf];
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  char *line;
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  size_t linesz;
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  if (! f)
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    {
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      perror ("tmpfile");
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      return 1;
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    }
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  if (fputs ("line\n", f) == EOF)
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    {
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      perror ("fputs");
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      return 1;
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    }
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  memset (obuf, 'z', sizeof obuf);
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  memset (ibuf, 'y', sizeof ibuf);
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  if (fwrite (obuf, sizeof obuf, 1, f) != 1)
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    {
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      perror ("fwrite");
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      return 1;
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    }
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  rewind (f);
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  line = NULL;
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  linesz = 0;
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  if (getline (&line, &linesz, f) != 5)
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    {
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      perror ("getline");
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      return 1;
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    }
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  if (strcmp (line, "line\n"))
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    {
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      puts ("Lines differ.  Test FAILED!");
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      return 1;
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    }
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  if (fread (ibuf, sizeof ibuf, 1, f) != 1)
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    {
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      perror ("fread");
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      return 1;
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    }
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  if (memcmp (ibuf, obuf, sizeof ibuf))
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    {
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      puts ("Buffers differ.  Test FAILED!");
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      return 1;
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    }
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  asprintf (&line, "\
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GDB is free software and you are welcome to distribute copies of it\n\
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 under certain conditions; type \"show copying\" to see the conditions.\n\
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There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
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");
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  puts ("Test succeeded.");
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  return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"