[PATCH 2 of 4] Consider that the last '\' character might be a part of MBCS

[Shun-ichi Goto]

# HG changeset patch
# User Shun-ichi GOTO <shunichi.goto at gmail.com>
# Date 1247143158 -32400
# Node ID aaafb9723679d3ba5e010347ac276a9037408d47
# Parent  1ea9bcb2d34907b0de2bba4cb2ed319a5f32b829
Consider that the last '\' character might be a part of MBCS.

diff -r 1ea9bcb2d349 -r aaafb9723679 mercurial/osutil.c
--- a/mercurial/osutil.c	Wed Jul 08 09:48:48 2009 -0400
+++ b/mercurial/osutil.c	Thu Jul 09 21:39:18 2009 +0900
@@ -200,6 +200,20 @@
 		char c = path[plen-1];
 		if (c != ':' && c != '/' && c != '\\')
 			pattern[plen++] = '\\';
+		else if (c == '\\') {
+			/* Decide the last '\' character is a part of multi byte
+			   character or appended path separator by converting to wide
+			   character string. */
+			pattern[--plen] = '\0';
+			if (MultiByteToWideChar(CP_ACP,
+									MB_PRECOMPOSED | MB_ERR_INVALID_CHARS,
+									pattern, plen,
+									NULL, 0) == 0) {
+				/* the last '\' is a part of MBCS, so recover it. */
+				pattern[plen++] = '\\';
+			}
+			pattern[plen++] = '\\';
+		}
 	}
 	strcpy(pattern + plen, "*");