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libbb: better unicode width support. Hopefully fixes bug 839.

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Also opens up a possibility to make other unicode stuff smaller
and more correct later. but:

function                                             old     new   delta
static.combining                                       -     516    +516
bb_wcwidth                                             -     328    +328
unicode_cut_nchars                                     -     141    +141
mbstowc_internal                                       -      93     +93
in_table                                               -      78     +78
cal_main                                             899     961     +62
static.combining0x10000                                -      40     +40
unicode_strlen                                         -      31     +31
bb_mbstrlen                                           31       -     -31
bb_mbstowcs                                          173     102     -71
------------------------------------------------------------------------------
(add/remove: 7/1 grow/shrink: 1/1 up/down: 1289/-102)        Total: 1187 bytes

Uses code of Markus Kuhn, which is in public domain:
http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
"Permission to use, copy, modify, and distribute this software
 for any purpose and without fee is hereby granted. The author
 disclaims all warranties with regard to this software."

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2010-01-24 07:44:03 +01:00
parent 5da9f96ad8
commit 9f93d62192
10 changed files with 410 additions and 98 deletions
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2
networking/udhcp/dumpleases.c
View File

@@ -72,7 +72,7 @@ int dumpleases_main(int argc UNUSED_PARAM, char **argv)
/* lease.hostname is char[20] and is always NUL terminated */
#if ENABLE_FEATURE_ASSUME_UNICODE
printf(" %-16s%s%*s", inet_ntoa(addr), lease.hostname,
20 - (int)bb_mbstrlen(lease.hostname), "");
20 - (int)unicode_strlen(lease.hostname), "");
#else
printf(" %-16s%-20s", inet_ntoa(addr), lease.hostname);
#endif