add libxdiff 0.5

Create file differences/patches to both binary and text files

textproc/Makefile

@@ -159,6 +159,7 @@
     SUBDIR += libtre
     SUBDIR += libuninameslist
     SUBDIR += libwpd
+    SUBDIR += libxdiff
     SUBDIR += libxml
     SUBDIR += libxml++
     SUBDIR += libxml2

textproc/libxdiff/Makefile

@@ -0,0 +1,23 @@
+# ex:ts=8
+# Ports collection makefile for:	libxdiff
+# Date created:			Jan 5, 2004
+# Whom:				ijliao
+#
+# $FreeBSD$
+#
+
+PORTNAME=	libxdiff
+PORTVERSION=	0.5
+CATEGORIES=	textproc
+MASTER_SITES=	http://www.xmailserver.org/
+
+MAINTAINER=	ports@FreeBSD.org
+COMMENT=	Create file differences/patches to both binary and text files
+
+BUILD_DEPENDS=	bash:${PORTSDIR}/shells/bash2
+
+GNU_CONFIGURE=	yes
+
+MAN3=	xdiff.3
+
+.include <bsd.port.mk>

textproc/libxdiff/distinfo

@@ -0,0 +1 @@
+MD5 (libxdiff-0.5.tar.gz) = d848a5569d499b1228d3d3c98489ae58

textproc/libxdiff/pkg-descr

@@ -0,0 +1,15 @@
+The LibXDiff library implements basic and yet complete functionalities to
+create file differences/patches to both binary and text files. The library
+uses memory files as file abstraction to achieve both performance and
+portability. For binary files, LibXDiff implements (with some modification)
+the algorithm described in File System Support for Delta Compression by
+Joshua P. MacDonald, while for text files it follows directives described in
+An O(ND) Difference Algorithm and Its Variations by Eugene W. Myers. Memory
+files used by the library are basically a collection of buffers that store the
+file content. There are two different requirements for memory files when passed
+to diff/patch functions. Text files for diff/patch functions require that a
+single line do not have to spawn across two different memory file blocks.
+Binary diff/patch functions require memory files to be compact. A compact
+memory files is a file whose content is stored inside a single block.
+
+WWW: http://www.xmailserver.org/xdiff-lib.html

textproc/libxdiff/pkg-plist

@@ -0,0 +1,2 @@
+include/xdiff.h
+lib/libxdiff.a