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-rw-r--r--libio/tst-memstream2.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/libio/tst-memstream2.c b/libio/tst-memstream2.c
new file mode 100644
index 0000000000..9619d7725d
--- /dev/null
+++ b/libio/tst-memstream2.c
@@ -0,0 +1,104 @@
+#include <mcheck.h>
+#include <stdio.h>
+
+
+#ifndef CHAR_T
+# define CHAR_T char
+# define W(o) o
+# define OPEN_MEMSTREAM open_memstream
+#endif
+
+#define S(s) S1 (s)
+#define S1(s) #s
+
+
+static void
+mcheck_abort (enum mcheck_status ev)
+{
+ printf ("mecheck failed with status %d\n", (int) ev);
+ exit (1);
+}
+
+
+static int
+do_test (void)
+{
+ mcheck_pedantic (mcheck_abort);
+
+ CHAR_T *buf = (CHAR_T *) 1l;
+ size_t len = 12345;
+ FILE *fp = OPEN_MEMSTREAM (&buf, &len);
+ if (fp == NULL)
+ {
+ printf ("%s failed\n", S(OPEN_MEMSTREAM));
+ return 1;
+ }
+
+ for (int outer = 0; outer < 800; ++outer)
+ {
+ for (int inner = 0; inner < 100; ++inner)
+ if (fputc (W('a') + (outer * 100 + inner) % 26, fp) == EOF)
+ {
+ printf ("fputc at %d:%d failed\n", outer, inner);
+ return 1;
+ }
+
+ if (fflush (fp) != 0)
+ {
+ puts ("fflush failed");
+ return 1;
+ }
+
+ if (len != (outer + 1) * 100)
+ {
+ printf ("string in round %d not %d bytest long\n",
+ outer + 1, (outer + 1) * 100);
+ return 1;
+ }
+ if (buf == (CHAR_T *) 1l)
+ {
+ printf ("round %d: buf not updated\n", outer + 1);
+ return 1;
+ }
+ for (int inner = 0; inner < (outer + 1) * 100; ++inner)
+ if (buf[inner] != W('a') + inner % 26)
+ {
+ printf ("round %d: buf[%d] != '%c'\n", outer + 1, inner,
+ (char) (W('a') + inner % 26));
+ return 1;
+ }
+ }
+
+ buf = (CHAR_T *) 1l;
+ len = 12345;
+ if (fclose (fp) != 0)
+ {
+ puts ("fclose failed");
+ return 1;
+ }
+
+ if (len != 800 * 100)
+ {
+ puts ("string after close not 80000 bytes long");
+ return 1;
+ }
+ if (buf == (CHAR_T *) 1l)
+ {
+ puts ("buf not updated");
+ return 1;
+ }
+ for (int inner = 0; inner < 800 * 100; ++inner)
+ if (buf[inner] != W('a') + inner % 26)
+ {
+ printf ("after close: buf[%d] != %c\n", inner,
+ (char) (W('a') + inner % 26));
+ return 1;
+ }
+
+ free (buf);
+
+ return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"