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-rw-r--r--toys/example/test_utf8towc.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/toys/example/test_utf8towc.c b/toys/example/test_utf8towc.c
new file mode 100644
index 00000000..f939eaa7
--- /dev/null
+++ b/toys/example/test_utf8towc.c
@@ -0,0 +1,42 @@
+/* test_utf8towc() against libc mbrtowc()
+ *
+ * Copyright 2017 Rob Landley <rob@landley.net>
+
+USE_TEST_UTF8TOWC(NEWTOY(test_utf8towc, 0, TOYFLAG_USR|TOYFLAG_BIN))
+
+config TEST_UTF8TOWC
+ bool "test_utf8towc"
+ default n
+ help
+ usage: test_utf8towc
+
+ Print differences between toybox's utf8 conversion routines vs libc du jour.
+*/
+
+#include "toys.h"
+
+void test_utf8towc_main(void)
+{
+ mbstate_t mb;
+ int len1, len2;
+ unsigned u, h;
+ wchar_t wc1, wc2;
+
+ setlocale(LC_ALL, "en_US.UTF-8");
+
+ memset(&mb, 0, sizeof(mb));
+ for (u=1; u; u++) {
+ char *str = (void *)&h;
+
+ wc1 = wc2 = 0;
+ len2 = 4;
+ h = htonl(u);
+ while (!*str) str++, len2--;
+
+ len1 = mbrtowc(&wc1, str, len2, &mb);
+ if (len1<0) memset(&mb, 0, sizeof(mb));
+ len2 = utf8towc(&wc2, str, len2);
+ if (len1 != len2 || wc1 != wc2)
+ printf("%x %d %x %d %x\n", u, len1, wc1, len2, wc2);
+ }
+}