mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 00:31:08 +00:00
107b8a922a
2006-08-14 Ulrich Drepper <drepper@redhat.com> [BZ #1996] * libio/memstream.c (open_memstream): Allocate initial buffer with calloc. * libio/wmemstream.c (open_wmemstream): Likewise. * libio/strops.c: Pretty printing. (_IO_str_overflow): Clear uninitialized part of the new buffer. (enlarge_userbuf): New function. (_IO_str_seekoff): Call it if seek position is larger than current buffer. * libio/wstrops.c: Likewise. * libio/vasprintf.c: Add comment as to why we do not have to use calloc instead of malloc to allocate initial buffer. * libio/Makefile (tests): Add bug-memstream1 and bug-wmemstream1. * libio/bug-memstream1.c: New file. * libio/bug-wmemstream1.c: New file.
134 lines
2.3 KiB
C
134 lines
2.3 KiB
C
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
size_t size;
|
|
char *buf;
|
|
FILE *fp = open_memstream (&buf, &size);
|
|
if (fp == NULL)
|
|
{
|
|
puts ("open_memstream failed");
|
|
return 1;
|
|
}
|
|
|
|
off64_t off = ftello64 (fp);
|
|
if (off != 0)
|
|
{
|
|
puts ("initial position wrong");
|
|
return 1;
|
|
}
|
|
|
|
if (fseek (fp, 32768, SEEK_SET) != 0)
|
|
{
|
|
puts ("fseek failed");
|
|
return 1;
|
|
}
|
|
|
|
if (fputs ("foo", fp) == EOF)
|
|
{
|
|
puts ("fputs failed");
|
|
return 1;
|
|
}
|
|
|
|
if (fclose (fp) == EOF)
|
|
{
|
|
puts ("fclose failed");
|
|
return 1;
|
|
}
|
|
|
|
if (size != 32768 + 3)
|
|
{
|
|
printf ("expected size %d, got %zu\n", 32768 + 3, size);
|
|
return 1;
|
|
}
|
|
|
|
for (int i = 0; i < 32768; ++i)
|
|
if (buf[i] != '\0')
|
|
{
|
|
printf ("byte at offset %d is %#hhx\n", i, buf[i]);
|
|
return 1;
|
|
}
|
|
|
|
if (memcmp (buf + 32768, "foo", 3) != 0)
|
|
{
|
|
puts ("written string incorrect");
|
|
return 1;
|
|
}
|
|
|
|
/* Mark the buffer. */
|
|
memset (buf, 'A', size);
|
|
free (buf);
|
|
|
|
/* Try again, this time with write mode enabled before the seek. */
|
|
fp = open_memstream (&buf, &size);
|
|
if (fp == NULL)
|
|
{
|
|
puts ("2nd open_memstream failed");
|
|
return 1;
|
|
}
|
|
|
|
off = ftello64 (fp);
|
|
if (off != 0)
|
|
{
|
|
puts ("2nd initial position wrong");
|
|
return 1;
|
|
}
|
|
|
|
if (fputs ("bar", fp) == EOF)
|
|
{
|
|
puts ("2nd fputs failed");
|
|
return 1;
|
|
}
|
|
|
|
if (fseek (fp, 32768, SEEK_SET) != 0)
|
|
{
|
|
puts ("2nd fseek failed");
|
|
return 1;
|
|
}
|
|
|
|
if (fputs ("foo", fp) == EOF)
|
|
{
|
|
puts ("3rd fputs failed");
|
|
return 1;
|
|
}
|
|
|
|
if (fclose (fp) == EOF)
|
|
{
|
|
puts ("2nd fclose failed");
|
|
return 1;
|
|
}
|
|
|
|
if (size != 32768 + 3)
|
|
{
|
|
printf ("2nd expected size %d, got %zu\n", 32768 + 3, size);
|
|
return 1;
|
|
}
|
|
|
|
if (memcmp (buf, "bar", 3) != 0)
|
|
{
|
|
puts ("initial string incorrect in 2nd try");
|
|
return 1;
|
|
}
|
|
|
|
for (int i = 3; i < 32768; ++i)
|
|
if (buf[i] != '\0')
|
|
{
|
|
printf ("byte at offset %d is %#hhx in 2nd try\n", i, buf[i]);
|
|
return 1;
|
|
}
|
|
|
|
if (memcmp (buf + 32768, "foo", 3) != 0)
|
|
{
|
|
puts ("written string incorrect in 2nd try");
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|