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glibc/libio/bug-ungetc2.c
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#include <stdio.h> | |
#include <sys/types.h> | |
static int | |
check (FILE *fp, off_t o) | |
{ | |
int result = 0; | |
if (feof (fp)) | |
{ | |
puts ("feof !"); | |
result = 1; | |
} | |
if (ferror (fp)) | |
{ | |
puts ("ferror !"); | |
result = 1; | |
} | |
if (ftello (fp) != o) | |
{ | |
printf ("position = %lu, not %lu\n", (unsigned long int) ftello (fp), | |
(unsigned long int) o); | |
result = 1; | |
} | |
return result; | |
} | |
static int | |
do_test (void) | |
{ | |
FILE *fp = tmpfile (); | |
if (fp == NULL) | |
{ | |
puts ("tmpfile failed"); | |
return 1; | |
} | |
if (check (fp, 0) != 0) | |
return 1; | |
puts ("going to write"); | |
if (fputs ("hello", fp) == EOF) | |
{ | |
puts ("fputs failed"); | |
return 1; | |
} | |
if (check (fp, 5) != 0) | |
return 1; | |
puts ("going to rewind"); | |
rewind (fp); | |
if (check (fp, 0) != 0) | |
return 1; | |
puts ("going to read char"); | |
int c = fgetc (fp); | |
if (c != 'h') | |
{ | |
printf ("read %c, not %c\n", c, 'h'); | |
return 1; | |
} | |
if (check (fp, 1) != 0) | |
return 1; | |
puts ("going to put back"); | |
if (ungetc (' ', fp) == EOF) | |
{ | |
puts ("ungetc failed"); | |
return 1; | |
} | |
if (check (fp, 0) != 0) | |
return 1; | |
puts ("going to write again"); | |
if (fputs ("world", fp) == EOF) | |
{ | |
puts ("2nd fputs failed"); | |
return 1; | |
} | |
if (check (fp, 5) != 0) | |
return 1; | |
puts ("going to rewind again"); | |
rewind (fp); | |
if (check (fp, 0) != 0) | |
return 1; | |
if (fclose (fp) != 0) | |
{ | |
puts ("fclose failed"); | |
return 1; | |
} | |
return 0; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |