uni_parse2.tcl

ejabberd-0.7.5 分布式Jabber服务器

# uni_parse2.tcl --
#
#	This program parses the UnicodeData file and generates the
#	corresponding uni_norm.c file with compressed character
#	data tables.  The input to this program should be the latest
#	UnicodeData.txt and CompositionExclusions.txt files from:
#	    ftp://ftp.unicode.org/Public/UNIDATA/
#
# Copyright (c) 1998-1999 by Scriptics Corporation.
# All rights reserved.
#
# Modified for ejabberd by Alexey Shchepin
# 
# RCS: @(#) $Id: uni_parse2.tcl,v 1.3 2003/10/09 18:08:34 aleksey Exp $


namespace eval uni {
    set cclass_shift 6
    set decomp_shift 5
    set comp_shift 5
    set shift 5;		# number of bits of data within a page
				# This value can be adjusted to find the
				# best split to minimize table size

    variable pMap;		# map from page to page index, each entry is
				# an index into the pages table, indexed by
				# page number
    variable pages;		# map from page index to page info, each
				# entry is a list of indices into the groups
				# table, the list is indexed by the offset
    variable groups;		# list of character info values, indexed by
				# group number, initialized with the
				# unassigned character group

    variable categories {
	Cn Lu Ll Lt Lm Lo Mn Me Mc Nd Nl No Zs Zl Zp
	Cc Cf Co Cs Pc Pd Ps Pe Pi Pf Po Sm Sc Sk So
    };				# Ordered list of character categories, must
				# match the enumeration in the header file.

    variable titleCount 0;	# Count of the number of title case
				# characters.  This value is used in the
				# regular expression code to allocate enough
				# space for the title case variants.
}

proc uni::getValue {items index} {
    variable categories
    variable titleCount

    # Extract character info

    set category [lindex $items 2]
    if {[scan [lindex $items 12] %4x toupper] == 1} {
	set toupper [expr {$index - $toupper}]
    } else {
	set toupper {}
    }
    if {[scan [lindex $items 13] %4x tolower] == 1} {
	set tolower [expr {$tolower - $index}]
    } else {
	set tolower {}
    }
    if {[scan [lindex $items 14] %4x totitle] == 1} {
	set totitle [expr {$index - $totitle}]
    } else {
	set totitle {}
    }

    set categoryIndex [lsearch -exact $categories $category]
    if {$categoryIndex < 0} {
	puts "Unexpected character category: $index($category)"
	set categoryIndex 0
    } elseif {$category == "Lt"} {
	incr titleCount
    }

    return "$categoryIndex,$toupper,$tolower,$totitle"
}

proc uni::getGroup {value} {
    variable groups

    set gIndex [lsearch -exact $groups $value]
    if {$gIndex == -1} {
	set gIndex [llength $groups]
	lappend groups $value
    }
    return $gIndex
}

proc uni::addPage {info} {
    variable pMap
    variable pages
    
    set pIndex [lsearch -exact $pages $info]
    if {$pIndex == -1} {
	set pIndex [llength $pages]
	lappend pages $info
    }
    lappend pMap $pIndex
    return
}

proc uni::addPage {map_var pages_var info} {
    variable $map_var
    variable $pages_var
    
    set pIndex [lsearch -exact [set $pages_var] $info]
    if {$pIndex == -1} {
	set pIndex [llength [set $pages_var]]
	lappend $pages_var $info
    }
    lappend $map_var $pIndex
    return
}

proc uni::load_exclusions {data} {
    variable exclusions

    foreach line [split $data \n] {
	if {$line == ""} continue

	set items [split $line " "]

	if {[lindex $items 0] == "#"} continue

	scan [lindex $items 0] %x index

	set exclusions($index) ""
    }
}

proc uni::load_tables {data} {
    variable cclass_map
    variable decomp_map
    variable comp_map
    variable comp_first
    variable comp_second
    variable exclusions

    foreach line [split $data \n] {
	if {$line == ""} continue

	set items [split $line \;]

	scan [lindex $items 0] %x index
	set cclass [lindex $items 3]
	set decomp [lindex $items 5]

	set cclass_map($index) $cclass
	#set decomp_map($index) $cclass

	if {$decomp != ""} {
	    if {[string index [lindex $decomp 0] 0] == "<"} {
		set decomp1 [lreplace $decomp 0 0]
		set decomp {}
		foreach ch $decomp1 {
		    scan $ch %x ch
		    lappend decomp $ch
		}
		set decomp_map($index) $decomp
	    } else {
		switch -- [llength $decomp] {
		    1 {
			scan $decomp %x ch
			set decomp_map($index) $ch
		    }
		    2 {
			scan $decomp "%x %x" ch1 ch2
			set decomp [list $ch1 $ch2]
			set decomp_map($index) $decomp
			# hackish
			if {(![info exists cclass_map($ch1)] || \
				 $cclass_map($ch1) == 0) && \
				![info exists exclusions($index)]} {
			    if {[info exists comp_first($ch1)]} {
				incr comp_first($ch1)
			    } else {
				set comp_first($ch1) 1
			    }
			    if {[info exists comp_second($ch2)]} {
				incr comp_second($ch2)
			    } else {
				set comp_second($ch2) 1
			    }
			    set comp_map($decomp) $index
			} else {
			    puts "Excluded $index"
			}
		    }
		    default {
			puts "Bad canonical decomposition: $line"
		    } 
		}
	    }

	    #puts "[format 0x%0.4x $index]\t$cclass\t$decomp_map($index)"
	}
    }
    #puts [array get comp_first]
    #puts [array get comp_second]
}

proc uni::buildTables {} {
    variable cclass_shift
    variable decomp_shift
    variable comp_shift

    variable cclass_map
    variable cclass_pmap {}
    variable cclass_pages {}
    variable decomp_map
    variable decomp_pmap {}
    variable decomp_pages {}
    variable decomp_list {}
    variable comp_map
    variable comp_pmap {}
    variable comp_pages {}
    variable comp_first
    variable comp_second
    variable comp_first_list {}
    variable comp_second_list {}
    variable comp_x_list {}
    variable comp_y_list {}
    variable comp_both_map {}

    set cclass_info {}
    set decomp_info {}
    set comp_info {}
    
    set cclass_mask [expr {(1 << $cclass_shift) - 1}]
    set decomp_mask [expr {(1 << $decomp_shift) - 1}]
    set comp_mask [expr {(1 << $comp_shift) - 1}]

    foreach comp [array names comp_map] {
	set ch1 [lindex $comp 0]
	set ch2 [lindex $comp 1]

	if {$comp_first($ch1) == 1} {
	    set i [llength $comp_first_list]
	    lappend comp_first_list [list $ch2 $comp_map($comp)]
	    set comp_info_map($ch1) [expr {$i | (1 << 16)}]
	} elseif {$comp_second($ch2) == 1} {
	    set i [llength $comp_second_list]
	    lappend comp_second_list [list $ch1 $comp_map($comp)]
	    set comp_info_map($ch2) [expr {$i | (1 << 16)}]
	} else {
	    if {[lsearch -exact $comp_x_list $ch1] < 0} {
		set i [llength $comp_x_list]
		lappend comp_x_list $ch1
		set comp_info_map($ch1) $i
	    }
	    if {[lsearch -exact $comp_y_list $ch2] < 0} {
		set i [llength $comp_y_list]
		lappend comp_y_list $ch2
		set comp_info_map($ch2) $i
	    }
	}
    }

    set next 0

    for {set i 0} {$i <= 0xffff} {incr i} {
	#set gIndex [getGroup [getValue $i]]

	set cclass_offset [expr {$i & $cclass_mask}]

	if {[info exists cclass_map($i)]} {
	    set cclass $cclass_map($i)
	} else {
	    set cclass 0
	}
	lappend cclass_info $cclass

	if {$cclass_offset == $cclass_mask} {
	    addPage cclass_pmap cclass_pages $cclass_info
	    set cclass_info {}
	}


	set decomp_offset [expr {$i & $decomp_mask}]

	if {[info exists decomp_map($i)]} {
	    set decomp $decomp_map($i)
	    #puts -$decomp
	    while {[info exists decomp_map([set ch1 [lindex $decomp 0]])]} {
		set decomp [concat $decomp_map($ch1) [lreplace $decomp 0 0]]
		#puts +$decomp
	    }

	    if {[info exists decomp_used($decomp)]} {
		lappend decomp_info $decomp_used($decomp)
	    } else {
		set val [expr {([llength $decomp] << 16) + \
				   [llength $decomp_list]}]
		#set val [expr {[llength $decomp_list]}]
		lappend decomp_info $val
		set decomp_used($decomp) $val
		#puts "$val $decomp"
		foreach d $decomp {
		    lappend decomp_list $d
		}
	    }
	} else {
	    lappend decomp_info -1
	}

	if {$decomp_offset == $decomp_mask} {
	    addPage decomp_pmap decomp_pages $decomp_info
	    set decomp_info {}
	}


	set comp_offset [expr {$i & $comp_mask}]

	if {[info exists comp_info_map($i)]} {
	    set comp $comp_info_map($i)
	} else {
	    set comp -1
	}
	lappend comp_info $comp

	if {$comp_offset == $comp_mask} {
	    addPage comp_pmap comp_pages $comp_info
	    set comp_info {}
	}
    }

    #puts [array get decomp_map]
    #puts $decomp_list

    return
}

proc uni::main {} {
    global argc argv0 argv
    variable cclass_shift