X-Git-Url: https://git.hcoop.net/hcoop/debian/courier-authlib.git/blobdiff_plain/940be80e3e40dbbbd84161e1e5ae3abf0b2eadf6..01037b081eab5fb3f208489dc3e052ec3a2c8ba1:/libs/unicode/unicode_wcwidth.c

diff --git a/libs/unicode/unicode_wcwidth.c b/libs/unicode/unicode_wcwidth.c
new file mode 100644
index 0000000..372f7a7
--- /dev/null
+++ b/libs/unicode/unicode_wcwidth.c
@@ -0,0 +1,71 @@
+#include "unicode_config.h"
+#include "unicode.h"
+
+#include "eastasianwidth.h"
+#include "linebreaktab_internal.h"
+
+#include <stdlib.h>
+
+int unicode_wcwidth(unicode_char c)
+{
+	size_t b=0;
+	size_t e=sizeof(unicode_wcwidth_tab)/sizeof(unicode_wcwidth_tab[0]);
+
+	while (b < e)
+	{
+		size_t n=b + (e-b)/2;
+
+		if (c >= unicode_wcwidth_tab[n][0])
+		{
+			if (c <= unicode_wcwidth_tab[n][1])
+				return 2;
+			b=n+1;
+		}
+		else
+		{
+			e=n;
+		}
+	}
+
+	switch (unicode_lb_lookup(c)) {
+	case UNICODE_LB_BK:
+	case UNICODE_LB_CR:
+	case UNICODE_LB_LF:
+	case UNICODE_LB_CM:
+	case UNICODE_LB_NL:
+	case UNICODE_LB_WJ:
+	case UNICODE_LB_ZW:
+		return 0;
+	default:
+		break;
+	}
+	return 1;
+}
+
+int unicode_isspace(unicode_char ch)
+{
+	if (ch == 9)
+		return 1;
+
+	switch (unicode_lb_lookup(ch)) {
+	case UNICODE_LB_BK:
+	case UNICODE_LB_CR:
+	case UNICODE_LB_LF:
+	case UNICODE_LB_NL:
+	case UNICODE_LB_SP:
+		return 1;
+	}
+
+	return 0;
+}
+
+size_t unicode_wcwidth_str(const unicode_char *c)
+{
+	size_t w=0;
+
+	while (*c)
+		w += unicode_wcwidth(*c++);
+
+
+	return w;
+}