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Diffstat (limited to 'stdio-common/tst-fmemopen3.c')
-rw-r--r--stdio-common/tst-fmemopen3.c118
1 files changed, 117 insertions, 1 deletions
diff --git a/stdio-common/tst-fmemopen3.c b/stdio-common/tst-fmemopen3.c
index 250f9ecc75..054b0697b3 100644
--- a/stdio-common/tst-fmemopen3.c
+++ b/stdio-common/tst-fmemopen3.c
@@ -25,8 +25,13 @@ static void
print_buffer (const char *s, size_t n)
{
size_t i;
+ printf ("{");
for (i=0; i<n; ++i)
- printf ("0x%02X (%c), ", s[i], s[i]);
+ {
+ printf ("0x%02X (%c)", s[i], s[i]);
+ if (i != n)
+ printf (", ");
+ }
}
/* This test check append mode initial position (a/a+) based on POSIX defition
@@ -186,6 +191,112 @@ do_test_read_seek_negative (void)
}
static int
+do_test_write_append_2 (const char *str)
+{
+ char buf[10];
+ size_t strn = strlen (str);
+ strcpy (buf, str);
+
+ FILE *fp = fmemopen (buf, sizeof (buf), "a+");
+ size_t r = ftell (fp);
+ size_t e = strlen (buf);
+ if (r != e)
+ {
+ printf ("%s: ftell returned %zu, expected %zu\n", __FUNCTION__, r, e);
+ return 1;
+ }
+
+ if (fseek (fp, 0, SEEK_SET) == -1)
+ {
+ printf ("%s: fseek returned -1\n", __FUNCTION__);
+ return 1;
+ }
+
+ int gr;
+ for (int i=0; i<strn; ++i)
+ {
+ if ((gr = getc (fp)) != str[i])
+ {
+ printf ("%s: getc failed returned %d, expected %d\n", __FUNCTION__,
+ gr, str[i]);
+ return 1;
+ }
+ }
+ if ((gr = getc (fp)) != EOF)
+ {
+ printf ("%s: getc failed returned %d, expected EOF\n", __FUNCTION__,
+ gr);
+ return 1;
+ }
+
+ if (fseek (fp, e+1, SEEK_SET) == -1)
+ {
+ printf ("%s: fseek returned -1\n", __FUNCTION__);
+ return 1;
+ }
+
+ if ((r = ftell (fp)) != e+1)
+ {
+ printf ("%s: ftell returned %zu, expected %zu\n", __FUNCTION__, r, e+1);
+ return 1;
+ }
+
+ if ((gr = getc (fp)) != EOF)
+ {
+ printf ("%s: getc failed returned %i\n", __FUNCTION__, gr);
+ return 1;
+ }
+
+ /* Check if internal position is not changed with a getc returning EOF. */
+ if ((r = ftell (fp)) != e+1)
+ {
+ printf ("%s: ftell returned %zu, expected %zu\n", __FUNCTION__, r, e+1);
+ return 1;
+ }
+
+ if (fseek (fp, 0, SEEK_CUR) == -1)
+ {
+ printf ("%s: fseek returned -1\n", __FUNCTION__);
+ return 1;
+ }
+
+ /* This should be overwritten by fprintf + fflush. */
+ buf[e+2] = 'X';
+
+ if ((r = fprintf (fp, "%d", 101)) != 3)
+ {
+ printf ("%s: fprintf returned %zu, expected %d\n", __FUNCTION__, r, 3);
+ return 1;
+ }
+
+ fflush (fp);
+
+ /* Check if internal position is changed by 3 (strlen of '101'). */
+ if ((r = ftell (fp)) != e+3)
+ {
+ printf ("%s: ftell returned %zu, expected %zu\n", __FUNCTION__, r, e+3);
+ return 1;
+ }
+
+ char exp[20];
+ sprintf (exp, "%s%d", str, 101);
+ if (memcmp (buf, exp, strlen (exp)) != 0)
+ {
+ printf ("%s: check failed:", __FUNCTION__);
+ printf ("\nexpected: ");
+ print_buffer (buf, sizeof (buf));
+ printf ("\nbuffer: ");
+ print_buffer (exp, sizeof (exp));
+ printf ("\n");
+ return 1;
+ }
+
+ fclose(fp);
+
+ return 0;
+}
+
+static int
do_test (void)
{
int ret = 0;
@@ -199,6 +310,11 @@ do_test (void)
ret += do_test_read_seek_negative ();
+ /* First test plus addend will fit in the define buffer of size 10. */
+ ret += do_test_write_append_2 ("test");
+ /* The second test will also fit, but not the final '\0'. */
+ ret += do_test_write_append_2 ("testing");
+
return ret;
}