add fgetwc regression test

[libc-test] / src / regression / fgetwc-buffering.c

diff --git a/src/regression/fgetwc-buffering.c b/src/regression/fgetwc-buffering.c
new file mode 100644 (file)
index 0000000..a73ad54
--- /dev/null
+++ b/src/regression/fgetwc-buffering.c
@@ -0,0 +1,39 @@
+// decode across buffer boundary
+#include <stdio.h>
+#include <locale.h>
+#include <wchar.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include "test.h"
+
+#define A(c) do { if (!(c)) t_error(#c" failed\n"); } while(0)
+
+int main()
+{
+       t_setutf8();
+
+       int p[2];
+       A(pipe(p) == 0);
+       A(write(p[1], "x\340\240", 3) == 3);
+       A(dup2(p[0], 0) == 0);
+       wint_t wc;
+       wc = fgetwc(stdin);
+       A(wc == 'x');
+       A(write(p[1], "\200", 1) == 1);
+       close(p[1]);
+
+       errno = 0;
+       wc = fgetwc(stdin);
+       if (wc != 0x800)
+               t_error("wanted 0x800, got 0x%x\n", (unsigned)wc);
+
+       wc = fgetwc(stdin);
+       if (wc != WEOF)
+               t_error("wanted WEOF, got 0x%x\n", (unsigned)wc);
+       if (errno != 0)
+               t_error("wanted errno==0, got %d (%s)\n", errno, strerror(errno));
+       A(feof(stdin)!=0);
+       A(ferror(stdin)==0);
+       return t_status;
+}