Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/libio/bug-memstream1.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
133 lines (111 sloc)
2.27 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#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" |