X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/afee8ed17a56617618fb7f963b111d7cf0fb56e7..369d712295bb4d450ea412727837d5a3fc3724b3:/test/getcwidth.c?ds=sidebyside

diff --git a/test/getcwidth.c b/test/getcwidth.c
index f24172fe..f2a2ac69 100644
--- a/test/getcwidth.c
+++ b/test/getcwidth.c
@@ -20,6 +20,9 @@
 #include <wchar.h>
 #endif
 
+static void usage(char *);
+static void dumpwidth(void);
+
 int
 main(int argc, char *argv[])
 {
@@ -35,17 +38,22 @@ main(int argc, char *argv[])
 
 	setlocale(LC_ALL, "");
 
-	if (argc != 1) {
-		fprintf(stderr, "Usage: %s\n", argv[0]);
-		fprintf(stderr, "Returns the column width of a UTF-8 "
-			"multibyte character\n");
-		exit(1);
+	if (argc > 2)
+		usage(argv[0]);
+
+	if (argc == 2) {
+		if (strcmp(argv[1], "--dump") == 0) {
+			dumpwidth();
+			exit(0);
+		} else {
+			usage(argv[0]);
+		}
 	}
 
 #ifndef MULTIBYTE_SUPPORT
 	fprintf(stderr, "Nmh was not configured with multibyte support\n");
 	exit(1);
-#else
+#else /* MULTIBYTE_SUPPORT */
 	/*
 	 * It's not clear to me that we can just call mbtowc() with a
 	 * combining character; just to be safe, feed it in a base
@@ -78,3 +86,39 @@ main(int argc, char *argv[])
 	exit(0);
 #endif /* MULTIBYTE_SUPPORT */
 }
+
+static void
+usage(char *argv0)
+{
+	fprintf(stderr, "Usage: %s [--dump]\n", argv0);
+	fprintf(stderr, "Returns the column width of a UTF-8 combining "
+		"multibyte character\n");
+	fprintf(stderr, "\t--dump\tDump complete width table\n");
+
+	exit(1);
+}
+
+static void
+dumpwidth(void)
+{
+#ifndef MULTIBYTE_SUPPORT
+	fprintf(stderr, "Nmh was not configured with multibyte support\n");
+	exit(1);
+#else /* MULTIBYTE_SUPPORT */
+	wchar_t wc, low;
+	int width, lastwidth;
+
+	for (wc = low = 1, lastwidth = wcwidth(wc); wc <= 0xffff; wc++) {
+		width = wcwidth(wc);
+		if (width != lastwidth) {
+			printf("%04X - %04X = %d\n", low, wc - 1, lastwidth);
+			low = wc;
+		}
+		lastwidth = width;
+	}
+
+	width = wcwidth(wc - 1);
+	if (width == lastwidth)
+		printf("%04X - %04X = %d\n", low, wc - 1, width);
+#endif /* MULTIBYTE_SUPPORT */
+}