Use system wcwidth() instead of carrying around UTF-8 width tables.

1 files changed, 27 insertions, 423 deletions

diff --git a/utf8.c b/utf8.c
index 3f6107a7..be0915ba 100644
--- a/utf8.c
+++ b/utf8.c
@@ -21,333 +21,10 @@
 #include <stdlib.h>
 #include <string.h>
 #include <vis.h>
+#include <wchar.h>
 
 #include "tmux.h"
 
-struct utf8_width_entry {
-	u_int	first;
-	u_int	last;
-
-	int	width;
-
-	struct utf8_width_entry	*left;
-	struct utf8_width_entry	*right;
-};
-
-/* Sorted, then repeatedly split in the middle to balance the tree. */
-static struct utf8_width_entry utf8_width_table[] = {
-	{ 0x00b41, 0x00b44, 0, NULL, NULL },
-	{ 0x008e4, 0x00902, 0, NULL, NULL },
-	{ 0x006d6, 0x006dd, 0, NULL, NULL },
-	{ 0x005c4, 0x005c5, 0, NULL, NULL },
-	{ 0x00591, 0x005bd, 0, NULL, NULL },
-	{ 0x00300, 0x0036f, 0, NULL, NULL },
-	{ 0x00483, 0x00489, 0, NULL, NULL },
-	{ 0x005bf, 0x005bf, 0, NULL, NULL },
-	{ 0x005c1, 0x005c2, 0, NULL, NULL },
-	{ 0x00610, 0x0061a, 0, NULL, NULL },
-	{ 0x00600, 0x00605, 0, NULL, NULL },
-	{ 0x005c7, 0x005c7, 0, NULL, NULL },
-	{ 0x0064b, 0x0065f, 0, NULL, NULL },
-	{ 0x0061c, 0x0061c, 0, NULL, NULL },
-	{ 0x00670, 0x00670, 0, NULL, NULL },
-	{ 0x007a6, 0x007b0, 0, NULL, NULL },
-	{ 0x006ea, 0x006ed, 0, NULL, NULL },
-	{ 0x006df, 0x006e4, 0, NULL, NULL },
-	{ 0x006e7, 0x006e8, 0, NULL, NULL },
-	{ 0x00711, 0x00711, 0, NULL, NULL },
-	{ 0x0070f, 0x0070f, 0, NULL, NULL },
-	{ 0x00730, 0x0074a, 0, NULL, NULL },
-	{ 0x0081b, 0x00823, 0, NULL, NULL },
-	{ 0x007eb, 0x007f3, 0, NULL, NULL },
-	{ 0x00816, 0x00819, 0, NULL, NULL },
-	{ 0x00829, 0x0082d, 0, NULL, NULL },
-	{ 0x00825, 0x00827, 0, NULL, NULL },
-	{ 0x00859, 0x0085b, 0, NULL, NULL },
-	{ 0x00a41, 0x00a42, 0, NULL, NULL },
-	{ 0x00981, 0x00981, 0, NULL, NULL },
-	{ 0x00941, 0x00948, 0, NULL, NULL },
-	{ 0x0093a, 0x0093a, 0, NULL, NULL },
-	{ 0x0093c, 0x0093c, 0, NULL, NULL },
-	{ 0x00951, 0x00957, 0, NULL, NULL },
-	{ 0x0094d, 0x0094d, 0, NULL, NULL },
-	{ 0x00962, 0x00963, 0, NULL, NULL },
-	{ 0x009e2, 0x009e3, 0, NULL, NULL },
-	{ 0x009c1, 0x009c4, 0, NULL, NULL },
-	{ 0x009bc, 0x009bc, 0, NULL, NULL },
-	{ 0x009cd, 0x009cd, 0, NULL, NULL },
-	{ 0x00a01, 0x00a02, 0, NULL, NULL },
-	{ 0x00a3c, 0x00a3c, 0, NULL, NULL },
-	{ 0x00ac1, 0x00ac5, 0, NULL, NULL },
-	{ 0x00a70, 0x00a71, 0, NULL, NULL },
-	{ 0x00a4b, 0x00a4d, 0, NULL, NULL },
-	{ 0x00a47, 0x00a48, 0, NULL, NULL },
-	{ 0x00a51, 0x00a51, 0, NULL, NULL },
-	{ 0x00a81, 0x00a82, 0, NULL, NULL },
-	{ 0x00a75, 0x00a75, 0, NULL, NULL },
-	{ 0x00abc, 0x00abc, 0, NULL, NULL },
-	{ 0x00ae2, 0x00ae3, 0, NULL, NULL },
-	{ 0x00ac7, 0x00ac8, 0, NULL, NULL },
-	{ 0x00acd, 0x00acd, 0, NULL, NULL },
-	{ 0x00b3c, 0x00b3c, 0, NULL, NULL },
-	{ 0x00b01, 0x00b01, 0, NULL, NULL },
-	{ 0x00b3f, 0x00b3f, 0, NULL, NULL },
-	{ 0x03190, 0x031ba, 2, NULL, NULL },
-	{ 0x017c9, 0x017d3, 0, NULL, NULL },
-	{ 0x00ec8, 0x00ecd, 0, NULL, NULL },
-	{ 0x00cc6, 0x00cc6, 0, NULL, NULL },
-	{ 0x00c3e, 0x00c40, 0, NULL, NULL },
-	{ 0x00b82, 0x00b82, 0, NULL, NULL },
-	{ 0x00b56, 0x00b56, 0, NULL, NULL },
-	{ 0x00b4d, 0x00b4d, 0, NULL, NULL },
-	{ 0x00b62, 0x00b63, 0, NULL, NULL },
-	{ 0x00bcd, 0x00bcd, 0, NULL, NULL },
-	{ 0x00bc0, 0x00bc0, 0, NULL, NULL },
-	{ 0x00c00, 0x00c00, 0, NULL, NULL },
-	{ 0x00c62, 0x00c63, 0, NULL, NULL },
-	{ 0x00c4a, 0x00c4d, 0, NULL, NULL },
-	{ 0x00c46, 0x00c48, 0, NULL, NULL },
-	{ 0x00c55, 0x00c56, 0, NULL, NULL },
-	{ 0x00cbc, 0x00cbc, 0, NULL, NULL },
-	{ 0x00c81, 0x00c81, 0, NULL, NULL },
-	{ 0x00cbf, 0x00cbf, 0, NULL, NULL },
-	{ 0x00dd2, 0x00dd4, 0, NULL, NULL },
-	{ 0x00d41, 0x00d44, 0, NULL, NULL },
-	{ 0x00ce2, 0x00ce3, 0, NULL, NULL },
-	{ 0x00ccc, 0x00ccd, 0, NULL, NULL },
-	{ 0x00d01, 0x00d01, 0, NULL, NULL },
-	{ 0x00d62, 0x00d63, 0, NULL, NULL },
-	{ 0x00d4d, 0x00d4d, 0, NULL, NULL },
-	{ 0x00dca, 0x00dca, 0, NULL, NULL },
-	{ 0x00e47, 0x00e4e, 0, NULL, NULL },
-	{ 0x00e31, 0x00e31, 0, NULL, NULL },
-	{ 0x00dd6, 0x00dd6, 0, NULL, NULL },
-	{ 0x00e34, 0x00e3a, 0, NULL, NULL },
-	{ 0x00eb4, 0x00eb9, 0, NULL, NULL },
-	{ 0x00eb1, 0x00eb1, 0, NULL, NULL },
-	{ 0x00ebb, 0x00ebc, 0, NULL, NULL },
-	{ 0x0105e, 0x01060, 0, NULL, NULL },
-	{ 0x00f8d, 0x00f97, 0, NULL, NULL },
-	{ 0x00f39, 0x00f39, 0, NULL, NULL },
-	{ 0x00f35, 0x00f35, 0, NULL, NULL },
-	{ 0x00f18, 0x00f19, 0, NULL, NULL },
-	{ 0x00f37, 0x00f37, 0, NULL, NULL },
-	{ 0x00f80, 0x00f84, 0, NULL, NULL },
-	{ 0x00f71, 0x00f7e, 0, NULL, NULL },
-	{ 0x00f86, 0x00f87, 0, NULL, NULL },
-	{ 0x01032, 0x01037, 0, NULL, NULL },
-	{ 0x00fc6, 0x00fc6, 0, NULL, NULL },
-	{ 0x00f99, 0x00fbc, 0, NULL, NULL },
-	{ 0x0102d, 0x01030, 0, NULL, NULL },
-	{ 0x0103d, 0x0103e, 0, NULL, NULL },
-	{ 0x01039, 0x0103a, 0, NULL, NULL },
-	{ 0x01058, 0x01059, 0, NULL, NULL },
-	{ 0x0135d, 0x0135f, 0, NULL, NULL },
-	{ 0x01085, 0x01086, 0, NULL, NULL },
-	{ 0x01071, 0x01074, 0, NULL, NULL },
-	{ 0x01082, 0x01082, 0, NULL, NULL },
-	{ 0x0109d, 0x0109d, 0, NULL, NULL },
-	{ 0x0108d, 0x0108d, 0, NULL, NULL },
-	{ 0x01100, 0x011ff, 2, NULL, NULL },
-	{ 0x01772, 0x01773, 0, NULL, NULL },
-	{ 0x01732, 0x01734, 0, NULL, NULL },
-	{ 0x01712, 0x01714, 0, NULL, NULL },
-	{ 0x01752, 0x01753, 0, NULL, NULL },
-	{ 0x017b7, 0x017bd, 0, NULL, NULL },
-	{ 0x017b4, 0x017b5, 0, NULL, NULL },
-	{ 0x017c6, 0x017c6, 0, NULL, NULL },
-	{ 0x01c2c, 0x01c33, 0, NULL, NULL },
-	{ 0x01a7f, 0x01a7f, 0, NULL, NULL },
-	{ 0x01a17, 0x01a18, 0, NULL, NULL },
-	{ 0x01920, 0x01922, 0, NULL, NULL },
-	{ 0x0180b, 0x0180e, 0, NULL, NULL },
-	{ 0x017dd, 0x017dd, 0, NULL, NULL },
-	{ 0x018a9, 0x018a9, 0, NULL, NULL },
-	{ 0x01932, 0x01932, 0, NULL, NULL },
-	{ 0x01927, 0x01928, 0, NULL, NULL },
-	{ 0x01939, 0x0193b, 0, NULL, NULL },
-	{ 0x01a60, 0x01a60, 0, NULL, NULL },
-	{ 0x01a56, 0x01a56, 0, NULL, NULL },
-	{ 0x01a1b, 0x01a1b, 0, NULL, NULL },
-	{ 0x01a58, 0x01a5e, 0, NULL, NULL },
-	{ 0x01a65, 0x01a6c, 0, NULL, NULL },
-	{ 0x01a62, 0x01a62, 0, NULL, NULL },
-	{ 0x01a73, 0x01a7c, 0, NULL, NULL },
-	{ 0x01b80, 0x01b81, 0, NULL, NULL },
-	{ 0x01b36, 0x01b3a, 0, NULL, NULL },
-	{ 0x01b00, 0x01b03, 0, NULL, NULL },
-	{ 0x01ab0, 0x01abe, 0, NULL, NULL },
-	{ 0x01b34, 0x01b34, 0, NULL, NULL },
-	{ 0x01b42, 0x01b42, 0, NULL, NULL },
-	{ 0x01b3c, 0x01b3c, 0, NULL, NULL },
-	{ 0x01b6b, 0x01b73, 0, NULL, NULL },
-	{ 0x01be6, 0x01be6, 0, NULL, NULL },
-	{ 0x01ba8, 0x01ba9, 0, NULL, NULL },
-	{ 0x01ba2, 0x01ba5, 0, NULL, NULL },
-	{ 0x01bab, 0x01bad, 0, NULL, NULL },
-	{ 0x01bed, 0x01bed, 0, NULL, NULL },
-	{ 0x01be8, 0x01be9, 0, NULL, NULL },
-	{ 0x01bef, 0x01bf1, 0, NULL, NULL },
-	{ 0x02329, 0x0232a, 2, NULL, NULL },
-	{ 0x01dc0, 0x01df5, 0, NULL, NULL },
-	{ 0x01ce2, 0x01ce8, 0, NULL, NULL },
-	{ 0x01cd0, 0x01cd2, 0, NULL, NULL },
-	{ 0x01c36, 0x01c37, 0, NULL, NULL },
-	{ 0x01cd4, 0x01ce0, 0, NULL, NULL },
-	{ 0x01cf4, 0x01cf4, 0, NULL, NULL },
-	{ 0x01ced, 0x01ced, 0, NULL, NULL },
-	{ 0x01cf8, 0x01cf9, 0, NULL, NULL },
-	{ 0x02060, 0x02064, 0, NULL, NULL },
-	{ 0x0200b, 0x0200f, 0, NULL, NULL },
-	{ 0x01dfc, 0x01dff, 0, NULL, NULL },
-	{ 0x0202a, 0x0202e, 0, NULL, NULL },
-	{ 0x02066, 0x0206f, 0, NULL, NULL },
-	{ 0x020d0, 0x020f0, 0, NULL, NULL },
-	{ 0x03001, 0x03029, 2, NULL, NULL },
-	{ 0x02e80, 0x02e99, 2, NULL, NULL },
-	{ 0x02d7f, 0x02d7f, 0, NULL, NULL },
-	{ 0x02cef, 0x02cf1, 0, NULL, NULL },
-	{ 0x02de0, 0x02dff, 0, NULL, NULL },
-	{ 0x02f00, 0x02fd5, 2, NULL, NULL },
-	{ 0x02e9b, 0x02ef3, 2, NULL, NULL },
-	{ 0x02ff0, 0x02ffb, 2, NULL, NULL },
-	{ 0x03099, 0x0309a, 0, NULL, NULL },
-	{ 0x0302e, 0x0303e, 2, NULL, NULL },
-	{ 0x0302a, 0x0302d, 0, NULL, NULL },
-	{ 0x03041, 0x03096, 2, NULL, NULL },
-	{ 0x03105, 0x0312d, 2, NULL, NULL },
-	{ 0x0309b, 0x030ff, 2, NULL, NULL },
-	{ 0x03131, 0x0318e, 2, NULL, NULL },
-	{ 0x10a3f, 0x10a3f, 0, NULL, NULL },
-	{ 0x0aa4c, 0x0aa4c, 0, NULL, NULL },
-	{ 0x0a825, 0x0a826, 0, NULL, NULL },
-	{ 0x0a490, 0x0a4c6, 2, NULL, NULL },
-	{ 0x03250, 0x032fe, 2, NULL, NULL },
-	{ 0x031f0, 0x0321e, 2, NULL, NULL },
-	{ 0x031c0, 0x031e3, 2, NULL, NULL },
-	{ 0x03220, 0x03247, 2, NULL, NULL },
-	{ 0x04e00, 0x09fcc, 2, NULL, NULL },
-	{ 0x03300, 0x04db5, 2, NULL, NULL },
-	{ 0x0a000, 0x0a48c, 2, NULL, NULL },
-	{ 0x0a6f0, 0x0a6f1, 0, NULL, NULL },
-	{ 0x0a674, 0x0a67d, 0, NULL, NULL },
-	{ 0x0a66f, 0x0a672, 0, NULL, NULL },
-	{ 0x0a69f, 0x0a69f, 0, NULL, NULL },
-	{ 0x0a806, 0x0a806, 0, NULL, NULL },
-	{ 0x0a802, 0x0a802, 0, NULL, NULL },
-	{ 0x0a80b, 0x0a80b, 0, NULL, NULL },
-	{ 0x0a9b6, 0x0a9b9, 0, NULL, NULL },
-	{ 0x0a947, 0x0a951, 0, NULL, NULL },
-	{ 0x0a8e0, 0x0a8f1, 0, NULL, NULL },
-	{ 0x0a8c4, 0x0a8c4, 0, NULL, NULL },
-	{ 0x0a926, 0x0a92d, 0, NULL, NULL },
-	{ 0x0a980, 0x0a982, 0, NULL, NULL },
-	{ 0x0a960, 0x0a97c, 2, NULL, NULL },
-	{ 0x0a9b3, 0x0a9b3, 0, NULL, NULL },
-	{ 0x0aa29, 0x0aa2e, 0, NULL, NULL },
-	{ 0x0a9bc, 0x0a9bc, 0, NULL, NULL },
-	{ 0x0a9e5, 0x0a9e5, 0, NULL, NULL },
-	{ 0x0aa35, 0x0aa36, 0, NULL, NULL },
-	{ 0x0aa31, 0x0aa32, 0, NULL, NULL },
-	{ 0x0aa43, 0x0aa43, 0, NULL, NULL },
-	{ 0x0fb1e, 0x0fb1e, 0, NULL, NULL },
-	{ 0x0aaf6, 0x0aaf6, 0, NULL, NULL },
-	{ 0x0aab7, 0x0aab8, 0, NULL, NULL },
-	{ 0x0aab0, 0x0aab0, 0, NULL, NULL },
-	{ 0x0aa7c, 0x0aa7c, 0, NULL, NULL },
-	{ 0x0aab2, 0x0aab4, 0, NULL, NULL },
-	{ 0x0aac1, 0x0aac1, 0, NULL, NULL },
-	{ 0x0aabe, 0x0aabf, 0, NULL, NULL },
-	{ 0x0aaec, 0x0aaed, 0, NULL, NULL },
-	{ 0x0ac00, 0x0d7a3, 2, NULL, NULL },
-	{ 0x0abe8, 0x0abe8, 0, NULL, NULL },
-	{ 0x0abe5, 0x0abe5, 0, NULL, NULL },
-	{ 0x0abed, 0x0abed, 0, NULL, NULL },
-	{ 0x0f900, 0x0fa6d, 2, NULL, NULL },
-	{ 0x0d800, 0x0dfff, 0, NULL, NULL },
-	{ 0x0fa70, 0x0fad9, 2, NULL, NULL },
-	{ 0x0fff9, 0x0fffb, 0, NULL, NULL },
-	{ 0x0fe30, 0x0fe52, 2, NULL, NULL },
-	{ 0x0fe10, 0x0fe19, 2, NULL, NULL },
-	{ 0x0fe00, 0x0fe0f, 0, NULL, NULL },
-	{ 0x0fe20, 0x0fe2d, 0, NULL, NULL },
-	{ 0x0fe68, 0x0fe6b, 2, NULL, NULL },
-	{ 0x0fe54, 0x0fe66, 2, NULL, NULL },
-	{ 0x0feff, 0x0feff, 0, NULL, NULL },
-	{ 0x10a01, 0x10a03, 0, NULL, NULL },
-	{ 0x102e0, 0x102e0, 0, NULL, NULL },
-	{ 0x101fd, 0x101fd, 0, NULL, NULL },
-	{ 0x10376, 0x1037a, 0, NULL, NULL },
-	{ 0x10a0c, 0x10a0f, 0, NULL, NULL },
-	{ 0x10a05, 0x10a06, 0, NULL, NULL },
-	{ 0x10a38, 0x10a3a, 0, NULL, NULL },
-	{ 0x11633, 0x1163a, 0, NULL, NULL },
-	{ 0x11236, 0x11237, 0, NULL, NULL },
-	{ 0x11100, 0x11102, 0, NULL, NULL },
-	{ 0x1107f, 0x11081, 0, NULL, NULL },
-	{ 0x11001, 0x11001, 0, NULL, NULL },
-	{ 0x10ae5, 0x10ae6, 0, NULL, NULL },
-	{ 0x11038, 0x11046, 0, NULL, NULL },
-	{ 0x110b9, 0x110ba, 0, NULL, NULL },
-	{ 0x110b3, 0x110b6, 0, NULL, NULL },
-	{ 0x110bd, 0x110bd, 0, NULL, NULL },
-	{ 0x11180, 0x11181, 0, NULL, NULL },
-	{ 0x1112d, 0x11134, 0, NULL, NULL },
-	{ 0x11127, 0x1112b, 0, NULL, NULL },
-	{ 0x11173, 0x11173, 0, NULL, NULL },
-	{ 0x1122f, 0x11231, 0, NULL, NULL },
-	{ 0x111b6, 0x111be, 0, NULL, NULL },
-	{ 0x11234, 0x11234, 0, NULL, NULL },
-	{ 0x11370, 0x11374, 0, NULL, NULL },
-	{ 0x11301, 0x11301, 0, NULL, NULL },
-	{ 0x112df, 0x112df, 0, NULL, NULL },
-	{ 0x112e3, 0x112ea, 0, NULL, NULL },
-	{ 0x11340, 0x11340, 0, NULL, NULL },
-	{ 0x1133c, 0x1133c, 0, NULL, NULL },
-	{ 0x11366, 0x1136c, 0, NULL, NULL },
-	{ 0x114c2, 0x114c3, 0, NULL, NULL },
-	{ 0x114ba, 0x114ba, 0, NULL, NULL },
-	{ 0x114b3, 0x114b8, 0, NULL, NULL },
-	{ 0x114bf, 0x114c0, 0, NULL, NULL },
-	{ 0x115bc, 0x115bd, 0, NULL, NULL },
-	{ 0x115b2, 0x115b5, 0, NULL, NULL },
-	{ 0x115bf, 0x115c0, 0, NULL, NULL },
-	{ 0x1d1aa, 0x1d1ad, 0, NULL, NULL },
-	{ 0x16b30, 0x16b36, 0, NULL, NULL },
-	{ 0x116ad, 0x116ad, 0, NULL, NULL },
-	{ 0x1163f, 0x11640, 0, NULL, NULL },
-	{ 0x1163d, 0x1163d, 0, NULL, NULL },
-	{ 0x116ab, 0x116ab, 0, NULL, NULL },
-	{ 0x116b7, 0x116b7, 0, NULL, NULL },
-	{ 0x116b0, 0x116b5, 0, NULL, NULL },
-	{ 0x16af0, 0x16af4, 0, NULL, NULL },
-	{ 0x1bca0, 0x1bca3, 0, NULL, NULL },
-	{ 0x1b000, 0x1b001, 2, NULL, NULL },
-	{ 0x16f8f, 0x16f92, 0, NULL, NULL },
-	{ 0x1bc9d, 0x1bc9e, 0, NULL, NULL },
-	{ 0x1d173, 0x1d182, 0, NULL, NULL },
-	{ 0x1d167, 0x1d169, 0, NULL, NULL },
-	{ 0x1d185, 0x1d18b, 0, NULL, NULL },
-	{ 0x2a700, 0x2b734, 2, NULL, NULL },
-	{ 0x1f210, 0x1f23a, 2, NULL, NULL },
-	{ 0x1e8d0, 0x1e8d6, 0, NULL, NULL },
-	{ 0x1d242, 0x1d244, 0, NULL, NULL },
-	{ 0x1f200, 0x1f202, 2, NULL, NULL },
-	{ 0x1f250, 0x1f251, 2, NULL, NULL },
-	{ 0x1f240, 0x1f248, 2, NULL, NULL },
-	{ 0x20000, 0x2a6d6, 2, NULL, NULL },
-	{ 0xe0020, 0xe007f, 0, NULL, NULL },
-	{ 0x2f800, 0x2fa1d, 2, NULL, NULL },
-	{ 0x2b740, 0x2b81d, 2, NULL, NULL },
-	{ 0xe0001, 0xe0001, 0, NULL, NULL },
-	{ 0xf0000, 0xffffd, 0, NULL, NULL },
-	{ 0xe0100, 0xe01ef, 0, NULL, NULL },
-	{ 0x100000, 0x10fffd, 0, NULL, NULL },
-};
-static struct utf8_width_entry	*utf8_width_root = NULL;
-
-static void	utf8_build(void);
-
 /* Set a single character. */
 void
 utf8_set(struct utf8_data *ud, u_char ch)
@@ -421,118 +98,45 @@ utf8_append(struct utf8_data *ud, u_char ch)
 	return (UTF8_DONE);
 }
 
-/* Build UTF-8 width tree. */
-static void
-utf8_build(void)
-{
-	struct utf8_width_entry	**ptr, *item, *node;
-	u_int			  i;
-
-	for (i = 0; i < nitems(utf8_width_table); i++) {
-		item = &utf8_width_table[i];
-
-		ptr = &utf8_width_root;
-		while (*ptr != NULL) {
-			node = *ptr;
-			if (item->last < node->first)
-				ptr = &node->left;
-			else if (item->first > node->last)
-				ptr = &node->right;
-		}
-		*ptr = item;
-	}
-}
-
-/* Lookup width of UTF-8 data in tree. */
+/* Get width of Unicode character. */
 u_int
-utf8_width(u_int uc)
+utf8_width(wchar_t wc)
 {
-	struct utf8_width_entry	*item;
+	int width;
 
-	if (utf8_width_root == NULL)
-		utf8_build();
-
-	item = utf8_width_root;
-	while (item != NULL) {
-		if (uc < item->first)
-			item = item->left;
-		else if (uc > item->last)
-			item = item->right;
-		else
-			return (item->width);
-	}
-	return (1);
+	width = wcwidth(wc);
+	if (width < 0)
+		return (0);
+	return (width);
 }
 
-/* Combine UTF-8 into 32-bit Unicode. */
-u_int
+/* Combine UTF-8 into Unicode. */
+wchar_t
 utf8_combine(const struct utf8_data *ud)
 {
-	u_int	uc;
-
-	uc = 0xfffd;
-	switch (ud->size) {
-	case 1:
-		uc = ud->data[0];
-		break;
-	case 2:
-		uc = ud->data[1] & 0x3f;
-		uc |= (ud->data[0] & 0x1f) << 6;
-		break;
-	case 3:
-		uc = ud->data[2] & 0x3f;
-		uc |= (ud->data[1] & 0x3f) << 6;
-		uc |= (ud->data[0] & 0xf) << 12;
-		break;
-	case 4:
-		uc = ud->data[3] & 0x3f;
-		uc |= (ud->data[2] & 0x3f) << 6;
-		uc |= (ud->data[1] & 0x3f) << 12;
-		uc |= (ud->data[0] & 0x7) << 18;
-		break;
-	}
-	return (uc);
+	wchar_t wc;
+
+	if (mbtowc(&wc, ud->data, ud->size) <= 0)
+		return (0xfffd);
+	return (wc);
 }
 
-/* Split 32-bit Unicode into UTF-8. */
+/* Split Unicode into UTF-8. */
 enum utf8_state
-utf8_split(u_int uc, struct utf8_data *ud)
+utf8_split(wchar_t wc, struct utf8_data *ud)
 {
-	if (uc < 0x7f) {
-		ud->size = 1;
-		ud->data[0] = uc;
-	} else if (uc < 0x7ff) {
-		ud->size = 2;
-		ud->data[0] = 0xc0 | ((uc >> 6) & 0x1f);
-		ud->data[1] = 0x80 | (uc & 0x3f);
-	} else if (uc < 0xffff) {
-		ud->size = 3;
-		ud->data[0] = 0xe0 | ((uc >> 12) & 0xf);
-		ud->data[1] = 0x80 | ((uc >> 6) & 0x3f);
-		ud->data[2] = 0x80 | (uc & 0x3f);
-	} else if (uc < 0x1fffff) {
-		ud->size = 4;
-		ud->data[0] = 0xf0 | ((uc >> 18) & 0x7);
-		ud->data[1] = 0x80 | ((uc >> 12) & 0x3f);
-		ud->data[2] = 0x80 | ((uc >> 6) & 0x3f);
-		ud->data[3] = 0x80 | (uc & 0x3f);
-	} else
+	char s[MB_CUR_MAX];
+	int  slen;
+
+	slen = wctomb(s, wc);
+	if (slen <= 0 || slen > (int)sizeof ud->data)
 		return (UTF8_ERROR);
-	ud->width = utf8_width(uc);
-	return (UTF8_DONE);
-}
 
-/* Split a two-byte UTF-8 character. */
-u_int
-utf8_split2(u_int uc, u_char *ptr)
-{
-	if (uc > 0x7f) {
-		ptr[0] = (uc >> 6) | 0xc0;
-		ptr[1] = (uc & 0x3f) | 0x80;
-		return (2);
-	}
-	ptr[0] = uc;
-	return (1);
+	memcpy(ud->data, s, slen);
+	ud->size = slen;
+
+	ud->width = utf8_width(wc);
+	return (UTF8_DONE);
 }
 
 /*