Pass character count from coding systems to buffer insertion code. src/ChangeLog addition: 2014-01-16 Aidan Kehoe <kehoea@parhasard.net> Pass character count information from the no-conversion and unicode coding systems to the buffer insertion code, making #'find-file on large buffers a little snappier (if ERROR_CHECK_TEXT is not defined). * file-coding.c: * file-coding.c (coding_character_tell): New. * file-coding.c (conversion_coding_stream_description): New. * file-coding.c (no_conversion_convert): Update characters_seen when decoding. * file-coding.c (no_conversion_character_tell): New. * file-coding.c (lstream_type_create_file_coding): Create the no_conversion type with data. * file-coding.c (coding_system_type_create): Make the character_tell method available here. * file-coding.h: * file-coding.h (struct coding_system_methods): Add a new character_tell() method, passing charcount information from the coding systems to the buffer code, avoiding duplicate bytecount-to-charcount work especially with large buffers. * fileio.c (Finsert_file_contents_internal): Update this to pass charcount information to buffer_insert_string_1(), if that is available from the lstream code. * insdel.c: * insdel.c (buffer_insert_string_1): Add a new CCLEN argument, giving the character count of the string to insert. It can be -1 to indicate that te function should work it out itself using bytecount_to_charcount(), as it used to. * insdel.c (buffer_insert_raw_string_1): * insdel.c (buffer_insert_lisp_string_1): * insdel.c (buffer_insert_ascstring_1): * insdel.c (buffer_insert_emacs_char_1): * insdel.c (buffer_insert_from_buffer_1): * insdel.c (buffer_replace_char): Update these functions to use the new calling convention. * insdel.h: * insdel.h (buffer_insert_string): Update this header to reflect the new buffer_insert_string_1() argument. * lstream.c (Lstream_character_tell): New. Return the number of characters *read* and seen by the consumer so far, taking into account the unget buffer, and buffered reading. * lstream.c (Lstream_unread): Update unget_character_count here as appropriate. * lstream.c (Lstream_rewind): Reset unget_character_count here too. * lstream.h: * lstream.h (struct lstream): Provide the character_tell method, add a new field, unget_character_count, giving the number of characters ever passed to Lstream_unread(). Declare Lstream_character_tell(). Make Lstream_ungetc(), which happens to be unused, an inline function rather than a macro, in the course of updating it to modify unget_character_count. * print.c (output_string): Use the new argument to buffer_insert_string_1(). * tests.c: * tests.c (Ftest_character_tell): New test function. * tests.c (syms_of_tests): Make it available. * unicode.c: * unicode.c (struct unicode_coding_stream): * unicode.c (unicode_character_tell): New method. * unicode.c (unicode_convert): Update the character counter as appropriate. * unicode.c (coding_system_type_create_unicode): Make the character_tell method available.

#! /bin/sh

# Enhanced sccs diff utility for use with vc mode.
# This version is more compatible with rcsdiff(1).

# Copyright (C) 1992, 1993, 1995, 1997, 2001, 2002, 2003, 2004, 2005,
#   2006, 2007, 2008, 2009, 2010  Free Software Foundation, Inc.

# Author: Paul Eggert
# (according to authors.el)

# This file is part of XEmacs.

# XEmacs is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# XEmacs is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with XEmacs.  If not, see <http://www.gnu.org/licenses/>.

# Modified by: vladimir@Eng.Sun.COM on 95-06-07
# * Made sure that file arguments are specifed as s.<filename>.

# Synced up with: GNU 23.1.92.
# Synced by: Ben Wing, 2-17-10.


DIFF="diff"
usage="$0: Usage: vcdiff [--brief] [-q] [-r<sid1>] [-r<sid2>] [diffopts] sccsfile..."

# Now that we use `sccs get' rather than just `get', we don't need this.
# PATH=$PATH:/usr/ccs/bin:/usr/sccs:/usr/xpg4/bin # common SCCS hangouts

echo="echo"
sid1= sid2=

for f
do
	case $f in
	-*)
		case $f in
		--brief)
			DIFF=cmp;;
		-q)
			echo=:;;
		-r?*)
			case $sid1 in
			'')
				sid1=$f
				;;
			*) 
				case $sid2 in
				?*) echo "$usage" >&2; exit 2 ;;
				esac
				sid2=$f
				;;
			esac
			;;
		*)
			options="$options $f"
			;;
		esac
		shift
		;;
	*)
		break
		;;
	esac
done

case $# in
0)
	echo "$usage" >&2
	exit 2
esac


rev1= rev2= status=0
trap 'status=2; exit' 1 2 13 15
trap 'rm -f $rev1 $rev2 || status=2; exit $status' 0

for f
do
	s=2
	
	# For files under SCCS control, fixup the file name to be the
	# s. filename
	if [ -d SCCS ]; then
		if [ $f = `echo $f | sed -e 's|SCCS/s.||'` ]; then
			f="SCCS/s.$f"
		fi
	fi 

	case $f in
	s.* | */s.*)
		if
			rev1=`mktemp /tmp/geta.XXXXXXXX`
			sccs get -s -p -k $sid1 "$f" > $rev1 &&
			case $sid2 in
			'')
				workfile=`expr " /$f" : '.*/s.\(.*\)'`
				;;
			*)
				rev2=`mktemp /tmp/getb.XXXXXXXX`
				sccs get -s -p -k $sid2 "$f" > $rev2
				workfile=$rev2
			esac
		then
			$echo $DIFF $options $rev1 $workfile >&2
			$DIFF $options $rev1 $workfile
			s=$?
		fi
		;;
	*)
		echo "$0: $f is not an SCCS file" >&2
	esac

	if test $status -lt $s
	then status=$s
	fi
done

# arch-tag: 4344ba3a-bcbe-4f77-971c-f43c1606953a