Add uprop_get_wdth() and ucswdth()

1 files changed, 18 insertions, 0 deletions

diff --git a/lib/unicode/string/u8wdth.c b/lib/unicode/string/u8wdth.c
new file mode 100644
index 0000000..503ff7c
--- /dev/null
+++ b/lib/unicode/string/u8wdth.c
@@ -0,0 +1,18 @@
+#include "mbstring.h"
+#include "unicode/prop.h"
+#include "unicode/string.h"
+
+size_t
+u8wdth(struct u8view sv)
+{
+	rune ch;
+	size_t n = 0;
+
+	while (ucsnext(&ch, &sv) != 0) {
+		int w = uprop_get_wdth(ch);
+		if (w > 0)
+			n += w;
+	}
+
+	return n;
+}