test/getcwidth: Expand --dump beyond Unicode's BMP.

diff --git a/test/getcwidth.c b/test/getcwidth.c
index c1717e17f58334976e3358503f8809fee52a735a..264d5831de3f2b94d6732a5de0b6b94ab55750c3 100644 (file)
--- a/test/getcwidth.c
+++ b/test/getcwidth.c
@@ -147,22 +147,43 @@ getwidth(const char *string)
 static void
 dumpwidth(void)
 {
-       wchar_t wc, low;
+       static struct {
+               wchar_t min, max;
+       } range[] = {
+               /* https://en.wikipedia.org/wiki/Unicode#Code_point_planes_and_blocks */
+               {  L'\x0000',  L'\xffff' },
+               { L'\x10000', L'\x14fff' },
+               { L'\x16000', L'\x18fff' },
+               { L'\x1b000', L'\x1bfff' },
+               { L'\x1d000', L'\x1ffff' },
+               { L'\x20000', L'\x2ffff' },
+               { L'\xe0000', L'\xe0fff' },
+               { L'\0', L'\0' }, /* Terminates list. */
+       }, *r;
+       int first;
+       wchar_t wc, start;
        int width, lastwidth;
 
-       for (wc = 0, low = 1, lastwidth = wcwidth(1); wc < 0xffff; wc++) {
-               width = wcwidth(wc+1);
-               if (width != lastwidth) {
-                       printf("%04lX - %04lX = %d\n", (unsigned long int) low,
-                              (unsigned long int) (wc), lastwidth);
-                       low = wc+1;
+       for (r = range; r->max; r++) {
+               first = 1;
+               for (wc = r->min; wc <= r->max; wc++) {
+                       width = wcwidth(wc);
+                       if (first) {
+                               start = wc;
+                               lastwidth = width;
+                               first = 0;
+                               continue;
+                       }
+                       if (width != lastwidth) {
+                               printf("%04lX - %04lX = %d\n", (unsigned long)start,
+                                          (unsigned long int)wc - 1, lastwidth);
+                               start = wc;
+                               lastwidth = width;
+                       }
+                       if (wc == r->max)
+                               printf("%04lX - %04lX = %d\n", (unsigned long)start,
+                                          (unsigned long int)wc, lastwidth);
                }
-               lastwidth = width;
        }
-
-       width = wcwidth(wc);
-       if (width == lastwidth)
-               printf("%04lX - %04lX = %d\n", (unsigned long int) low,
-                      (unsigned long int) (wc), width);
 #endif /* MULTIBYTE_SUPPORT */
 }