freading is only deterministic after input or output, but this
test case should be portable even on open, after reposition, and
at EOF. */
+ /* First a scenario with only fgetc, fseek, fputc. */
fp = fopen (TESTFILE, "r+");
if (fp == NULL)
goto skip;
if (fseek (fp, 0, SEEK_CUR) != 0)
goto skip;
/* freading (fp) is undefined here, but fwriting (fp) is false. */
- if (fputc ('z', fp) != 'z')
+ if (fputc ('x', fp) != 'x')
goto skip;
ASSERT (!freading (fp));
if (fseek (fp, 0, SEEK_END))
freading is only deterministic after input or output, but this
test case should be portable even on open, after reposition, and
at EOF. */
+ /* Here a scenario that includes fflush. */
fp = fopen (TESTFILE, "r+");
if (fp == NULL)
goto skip;
ASSERT (freading (fp));
fflush (fp);
/* freading (fp) is undefined here, but fwriting (fp) is false. */
- if (fgetc (fp) != 'a')
+ if (fgetc (fp) != 'x')
goto skip;
ASSERT (freading (fp));
/* This fseek call is necessary when switching from reading to writing.