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sqlite/ext/fts3/unicode/mkunicode.tcl

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#
# Parameter $zName must be a path to the file UnicodeData.txt. This command
# reads the file and returns a list of mappings required to remove all
# diacritical marks from a unicode string. Each mapping is itself a list
# consisting of two elements - the unicode codepoint and the single ASCII
# character that it should be replaced with, or an empty string if the
# codepoint should simply be removed from the input. Examples:
#
# { 224 a } (replace codepoint 224 to "a")
# { 769 "" } (remove codepoint 769 from input)
#
# Mappings are only returned for non-upper case codepoints. It is assumed
# that the input has already been folded to lower case.
#
proc rd_load_unicodedata_text {zName} {
global tl_lookup_table
set fd [open $zName]
set lField {
code
character_name
general_category
canonical_combining_classes
bidirectional_category
character_decomposition_mapping
decimal_digit_value
digit_value
numeric_value
mirrored
unicode_1_name
iso10646_comment_field
uppercase_mapping
lowercase_mapping
titlecase_mapping
}
set lRet [list]
while { ![eof $fd] } {
set line [gets $fd]
if {$line == ""} continue
set fields [split $line ";"]
if {[llength $fields] != [llength $lField]} { error "parse error: $line" }
foreach $lField $fields {}
if { [llength $character_decomposition_mapping]!=2
|| [string is xdigit [lindex $character_decomposition_mapping 0]]==0
} {
continue
}
set iCode [expr "0x$code"]
set iAscii [expr "0x[lindex $character_decomposition_mapping 0]"]
set iDia [expr "0x[lindex $character_decomposition_mapping 1]"]
if {[info exists tl_lookup_table($iCode)]} continue
if { ($iAscii >= 97 && $iAscii <= 122)
|| ($iAscii >= 65 && $iAscii <= 90)
} {
lappend lRet [list $iCode [string tolower [format %c $iAscii]]]
set dia($iDia) 1
}
}
foreach d [array names dia] {
lappend lRet [list $d ""]
}
set lRet [lsort -integer -index 0 $lRet]
close $fd
set lRet
}
proc print_rd {map} {
global tl_lookup_table
set aChar [list]
set lRange [list]
set nRange 1
set iFirst [lindex $map 0 0]
set cPrev [lindex $map 0 1]
foreach m [lrange $map 1 end] {
foreach {i c} $m {}
if {$cPrev == $c} {
for {set j [expr $iFirst+$nRange]} {$j<$i} {incr j} {
if {[info exists tl_lookup_table($j)]==0} break
}
if {$j==$i} {
set nNew [expr {(1 + $i - $iFirst)}]
if {$nNew<=8} {
set nRange $nNew
continue
}
}
}
lappend lRange [list $iFirst $nRange]
lappend aChar $cPrev
set iFirst $i
set cPrev $c
set nRange 1
}
lappend lRange [list $iFirst $nRange]
lappend aChar $cPrev
puts "/*"
puts "** If the argument is a codepoint corresponding to a lowercase letter"
puts "** in the ASCII range with a diacritic added, return the codepoint"
puts "** of the ASCII letter only. For example, if passed 235 - \"LATIN"
puts "** SMALL LETTER E WITH DIAERESIS\" - return 65 (\"LATIN SMALL LETTER"
puts "** E\"). The resuls of passing a codepoint that corresponds to an"
puts "** uppercase letter are undefined."
puts "*/"
puts "static int remove_diacritic(int c)\{"
puts " unsigned short aDia\[\] = \{"
puts -nonewline " 0, "
set i 1
foreach r $lRange {
foreach {iCode nRange} $r {}
if {($i % 8)==0} {puts "" ; puts -nonewline " " }
incr i
puts -nonewline [format "%5d" [expr ($iCode<<3) + $nRange-1]]
puts -nonewline ", "
}
puts ""
puts " \};"
puts " char aChar\[\] = \{"
puts -nonewline " '\\0', "
set i 1
foreach c $aChar {
set str "'$c', "
if {$c == ""} { set str "'\\0', " }
if {($i % 12)==0} {puts "" ; puts -nonewline " " }
incr i
puts -nonewline "$str"
}
puts ""
puts " \};"
puts {
unsigned int key = (((unsigned int)c)<<3) | 0x00000007;
int iRes = 0;
int iHi = sizeof(aDia)/sizeof(aDia[0]) - 1;
int iLo = 0;
while( iHi>=iLo ){
int iTest = (iHi + iLo) / 2;
if( key >= aDia[iTest] ){
iRes = iTest;
iLo = iTest+1;
}else{
iHi = iTest-1;
}
}
assert( key>=aDia[iRes] );
return ((c > (aDia[iRes]>>3) + (aDia[iRes]&0x07)) ? c : (int)aChar[iRes]);}
puts "\};"
}
proc print_isdiacritic {zFunc map} {
set lCode [list]
foreach m $map {
foreach {code char} $m {}
if {$code && $char == ""} { lappend lCode $code }
}
set lCode [lsort -integer $lCode]
set iFirst [lindex $lCode 0]
set iLast [lindex $lCode end]
set i1 0
set i2 0
foreach c $lCode {
set i [expr $c - $iFirst]
if {$i < 32} {
set i1 [expr {$i1 | (1<<$i)}]
} else {
set i2 [expr {$i2 | (1<<($i-32))}]
}
}
puts "/*"
puts "** Return true if the argument interpreted as a unicode codepoint"
puts "** is a diacritical modifier character."
puts "*/"
puts "int ${zFunc}\(int c)\{"
puts " unsigned int mask0 = [format "0x%08X" $i1];"
puts " unsigned int mask1 = [format "0x%08X" $i2];"
puts " if( c<$iFirst || c>$iLast ) return 0;"
puts " return (c < $iFirst+32) ?"
puts " (mask0 & (1 << (c-$iFirst))) :"
puts " (mask1 & (1 << (c-$iFirst-32)));"
puts "\}"
}
#-------------------------------------------------------------------------
# Parameter $zName must be a path to the file UnicodeData.txt. This command
# reads the file and returns a list of codepoints (integers). The list
# contains all codepoints in the UnicodeData.txt assigned to any "General
# Category" that is not a "Letter" or "Number".
#
proc an_load_unicodedata_text {zName} {
set fd [open $zName]
set lField {
code
character_name
general_category
canonical_combining_classes
bidirectional_category
character_decomposition_mapping
decimal_digit_value
digit_value
numeric_value
mirrored
unicode_1_name
iso10646_comment_field
uppercase_mapping
lowercase_mapping
titlecase_mapping
}
set lRet [list]
while { ![eof $fd] } {
set line [gets $fd]
if {$line == ""} continue
set fields [split $line ";"]
if {[llength $fields] != [llength $lField]} { error "parse error: $line" }
foreach $lField $fields {}
set iCode [expr "0x$code"]
set bAlnum [expr {[lsearch {L N} [string range $general_category 0 0]]>=0}]
if { !$bAlnum } { lappend lRet $iCode }
}
close $fd
set lRet
}
proc an_load_separator_ranges {} {
global unicodedata.txt
set lSep [an_load_unicodedata_text ${unicodedata.txt}]
unset -nocomplain iFirst
unset -nocomplain nRange
set lRange [list]
foreach sep $lSep {
if {0==[info exists iFirst]} {
set iFirst $sep
set nRange 1
} elseif { $sep == ($iFirst+$nRange) } {
incr nRange
} else {
lappend lRange [list $iFirst $nRange]
set iFirst $sep
set nRange 1
}
}
lappend lRange [list $iFirst $nRange]
set lRange
}
proc an_print_range_array {lRange} {
set iFirstMax 0
set nRangeMax 0
foreach range $lRange {
foreach {iFirst nRange} $range {}
if {$iFirst > $iFirstMax} {set iFirstMax $iFirst}
if {$nRange > $nRangeMax} {set nRangeMax $nRange}
}
if {$iFirstMax >= (1<<22)} {error "first-max is too large for format"}
if {$nRangeMax >= (1<<10)} {error "range-max is too large for format"}
puts -nonewline " "
puts [string trim {
/* Each unsigned integer in the following array corresponds to a contiguous
** range of unicode codepoints that are not either letters or numbers (i.e.
** codepoints for which this function should return 0).
**
** The most significant 22 bits in each 32-bit value contain the first
** codepoint in the range. The least significant 10 bits are used to store
** the size of the range (always at least 1). In other words, the value
** ((C<<22) + N) represents a range of N codepoints starting with codepoint
** C. It is not possible to represent a range larger than 1023 codepoints
** using this format.
*/
}]
puts -nonewline " const static unsigned int aEntry\[\] = \{"
set i 0
foreach range $lRange {
foreach {iFirst nRange} $range {}
set u32 [format "0x%08X" [expr ($iFirst<<10) + $nRange]]
if {($i % 5)==0} {puts "" ; puts -nonewline " "}
puts -nonewline " $u32,"
incr i
}
puts ""
puts " \};"
}
proc an_print_ascii_bitmap {lRange} {
foreach range $lRange {
foreach {iFirst nRange} $range {}
for {set i $iFirst} {$i < ($iFirst+$nRange)} {incr i} {
if {$i<=127} { set a($i) 1 }
}
}
set aAscii [list 0 0 0 0]
foreach key [array names a] {
set idx [expr $key >> 5]
lset aAscii $idx [expr [lindex $aAscii $idx] | (1 << ($key&0x001F))]
}
puts " static const unsigned int aAscii\[4\] = \{"
puts -nonewline " "
foreach v $aAscii { puts -nonewline [format " 0x%08X," $v] }
puts ""
puts " \};"
}
proc print_isalnum {zFunc lRange} {
puts "/*"
puts "** Return true if the argument corresponds to a unicode codepoint"
puts "** classified as either a letter or a number. Otherwise false."
puts "**"
puts "** The results are undefined if the value passed to this function"
puts "** is less than zero."
puts "*/"
puts "int ${zFunc}\(int c)\{"
an_print_range_array $lRange
an_print_ascii_bitmap $lRange
puts {
if( c<128 ){
return ( (aAscii[c >> 5] & (1 << (c & 0x001F)))==0 );
}else if( c<(1<<22) ){
unsigned int key = (((unsigned int)c)<<10) | 0x000003FF;
int iRes;
int iHi = sizeof(aEntry)/sizeof(aEntry[0]) - 1;
int iLo = 0;
while( iHi>=iLo ){
int iTest = (iHi + iLo) / 2;
if( key >= aEntry[iTest] ){
iRes = iTest;
iLo = iTest+1;
}else{
iHi = iTest-1;
}
}
assert( aEntry[0]<key );
assert( key>=aEntry[iRes] );
return (c >= ((aEntry[iRes]>>10) + (aEntry[iRes]&0x3FF)));
}
return 1;}
puts "\}"
}
proc print_test_isalnum {zFunc lRange} {
foreach range $lRange {
foreach {iFirst nRange} $range {}
for {set i $iFirst} {$i < ($iFirst+$nRange)} {incr i} { set a($i) 1 }
}
puts "static int isalnum_test(int *piCode)\{"
puts -nonewline " unsigned char aAlnum\[\] = \{"
for {set i 0} {$i < 70000} {incr i} {
if {($i % 32)==0} { puts "" ; puts -nonewline " " }
set bFlag [expr ![info exists a($i)]]
puts -nonewline "${bFlag},"
}
puts ""
puts " \};"
puts -nonewline " int aLargeSep\[\] = \{"
set i 0
foreach iSep [lsort -integer [array names a]] {
if {$iSep<70000} continue
if {($i % 8)==0} { puts "" ; puts -nonewline " " }
puts -nonewline " $iSep,"
incr i
}
puts ""
puts " \};"
puts -nonewline " int aLargeOther\[\] = \{"
set i 0
foreach iSep [lsort -integer [array names a]] {
if {$iSep<70000} continue
if {[info exists a([expr $iSep-1])]==0} {
if {($i % 8)==0} { puts "" ; puts -nonewline " " }
puts -nonewline " [expr $iSep-1],"
incr i
}
if {[info exists a([expr $iSep+1])]==0} {
if {($i % 8)==0} { puts "" ; puts -nonewline " " }
puts -nonewline " [expr $iSep+1],"
incr i
}
}
puts ""
puts " \};"
puts [subst -nocommands {
int i;
for(i=0; i<sizeof(aAlnum)/sizeof(aAlnum[0]); i++){
if( ${zFunc}(i)!=aAlnum[i] ){
*piCode = i;
return 1;
}
}
for(i=0; i<sizeof(aLargeSep)/sizeof(aLargeSep[0]); i++){
if( ${zFunc}(aLargeSep[i])!=0 ){
*piCode = aLargeSep[i];
return 1;
}
}
for(i=0; i<sizeof(aLargeOther)/sizeof(aLargeOther[0]); i++){
if( ${zFunc}(aLargeOther[i])!=1 ){
*piCode = aLargeOther[i];
return 1;
}
}
}]
puts " return 0;"
puts "\}"
}
#-------------------------------------------------------------------------
proc tl_load_casefolding_txt {zName} {
global tl_lookup_table
set fd [open $zName]
while { ![eof $fd] } {
set line [gets $fd]
if {[string range $line 0 0] == "#"} continue
if {$line == ""} continue
foreach x {a b c d} {unset -nocomplain $x}
foreach {a b c d} [split $line ";"] {}
set a2 [list]
set c2 [list]
foreach elem $a { lappend a2 [expr "0x[string trim $elem]"] }
foreach elem $c { lappend c2 [expr "0x[string trim $elem]"] }
set b [string trim $b]
set d [string trim $d]
if {$b=="C" || $b=="S"} { set tl_lookup_table($a2) $c2 }
}
}
proc tl_create_records {} {
global tl_lookup_table
set iFirst ""
set nOff 0
set nRange 0
set nIncr 0
set lRecord [list]
foreach code [lsort -integer [array names tl_lookup_table]] {
set mapping $tl_lookup_table($code)
if {$iFirst == ""} {
set iFirst $code
set nOff [expr $mapping - $code]
set nRange 1
set nIncr 1
} else {
set diff [expr $code - ($iFirst + ($nIncr * ($nRange - 1)))]
if { $nRange==1 && ($diff==1 || $diff==2) } {
set nIncr $diff
}
if {$diff != $nIncr || ($mapping - $code)!=$nOff} {
if { $nRange==1 } {set nIncr 1}
lappend lRecord [list $iFirst $nIncr $nRange $nOff]
set iFirst $code
set nOff [expr $mapping - $code]
set nRange 1
set nIncr 1
} else {
incr nRange
}
}
}
lappend lRecord [list $iFirst $nIncr $nRange $nOff]
set lRecord
}
proc tl_print_table_header {} {
puts -nonewline " "
puts [string trim {
/* Each entry in the following array defines a rule for folding a range
** of codepoints to lower case. The rule applies to a range of nRange
** codepoints starting at codepoint iCode.
**
** If the least significant bit in flags is clear, then the rule applies
** to all nRange codepoints (i.e. all nRange codepoints are upper case and
** need to be folded). Or, if it is set, then the rule only applies to
** every second codepoint in the range, starting with codepoint C.
**
** The 7 most significant bits in flags are an index into the aiOff[]
** array. If a specific codepoint C does require folding, then its lower
** case equivalent is ((C + aiOff[flags>>1]) & 0xFFFF).
**
** The contents of this array are generated by parsing the CaseFolding.txt
** file distributed as part of the "Unicode Character Database". See
** http://www.unicode.org for details.
*/
}]
puts " static const struct TableEntry \{"
puts " unsigned short iCode;"
puts " unsigned char flags;"
puts " unsigned char nRange;"
puts " \} aEntry\[\] = \{"
}
proc tl_print_table_entry {togglevar entry liOff} {
upvar $togglevar t
foreach {iFirst nIncr nRange nOff} $entry {}
if {$iFirst > (1<<16)} { return 1 }
if {[info exists t]==0} {set t 0}
if {$t==0} { puts -nonewline " " }
set flags 0
if {$nIncr==2} { set flags 1 ; set nRange [expr $nRange * 2]}
if {$nOff<0} { incr nOff [expr (1<<16)] }
set idx [lsearch $liOff $nOff]
if {$idx<0} {error "malfunction generating aiOff"}
set flags [expr $flags + $idx*2]
set txt "{$iFirst, $flags, $nRange},"
if {$t==2} {
puts $txt
} else {
puts -nonewline [format "% -23s" $txt]
}
set t [expr ($t+1)%3]
return 0
}
proc tl_print_table_footer {togglevar} {
upvar $togglevar t
if {$t!=0} {puts ""}
puts " \};"
}
proc tl_print_if_entry {entry} {
foreach {iFirst nIncr nRange nOff} $entry {}
if {$nIncr==2} {error "tl_print_if_entry needs improvement!"}
puts " else if( c>=$iFirst && c<[expr $iFirst+$nRange] )\{"
puts " ret = c + $nOff;"
puts " \}"
}
proc tl_generate_ioff_table {lRecord} {
foreach entry $lRecord {
foreach {iFirst nIncr nRange iOff} $entry {}
if {$iOff<0} { incr iOff [expr (1<<16)] }
if {[info exists a($iOff)]} continue
set a($iOff) 1
}
set liOff [lsort -integer [array names a]]
if {[llength $liOff]>128} { error "Too many distinct ioffs" }
return $liOff
}
proc tl_print_ioff_table {liOff} {
puts -nonewline " static const unsigned short aiOff\[\] = \{"
set i 0
foreach off $liOff {
if {($i % 8)==0} {puts "" ; puts -nonewline " "}
puts -nonewline [format "% -7s" "$off,"]
incr i
}
puts ""
puts " \};"
}
proc print_fold {zFunc} {
set lRecord [tl_create_records]
set lHigh [list]
puts "/*"
puts "** Interpret the argument as a unicode codepoint. If the codepoint"
puts "** is an upper case character that has a lower case equivalent,"
puts "** return the codepoint corresponding to the lower case version."
puts "** Otherwise, return a copy of the argument."
puts "**"
puts "** The results are undefined if the value passed to this function"
puts "** is less than zero."
puts "*/"
puts "int ${zFunc}\(int c, int bRemoveDiacritic)\{"
set liOff [tl_generate_ioff_table $lRecord]
tl_print_table_header
foreach entry $lRecord {
if {[tl_print_table_entry toggle $entry $liOff]} {
lappend lHigh $entry
}
}
tl_print_table_footer toggle
tl_print_ioff_table $liOff
puts {
int ret = c;
assert( c>=0 );
assert( sizeof(unsigned short)==2 && sizeof(unsigned char)==1 );
if( c<128 ){
if( c>='A' && c<='Z' ) ret = c + ('a' - 'A');
}else if( c<65536 ){
int iHi = sizeof(aEntry)/sizeof(aEntry[0]) - 1;
int iLo = 0;
int iRes = -1;
while( iHi>=iLo ){
int iTest = (iHi + iLo) / 2;
int cmp = (c - aEntry[iTest].iCode);
if( cmp>=0 ){
iRes = iTest;
iLo = iTest+1;
}else{
iHi = iTest-1;
}
}
assert( iRes<0 || c>=aEntry[iRes].iCode );
if( iRes>=0 ){
const struct TableEntry *p = &aEntry[iRes];
if( c<(p->iCode + p->nRange) && 0==(0x01 & p->flags & (p->iCode ^ c)) ){
ret = (c + (aiOff[p->flags>>1])) & 0x0000FFFF;
assert( ret>0 );
}
}
if( bRemoveDiacritic ) ret = remove_diacritic(ret);
}
}
foreach entry $lHigh {
tl_print_if_entry $entry
}
puts ""
puts " return ret;"
puts "\}"
}
proc print_fold_test {zFunc mappings} {
global tl_lookup_table
foreach m $mappings {
set c [lindex $m 1]
if {$c == ""} {
set extra([lindex $m 0]) 0
} else {
scan $c %c i
set extra([lindex $m 0]) $i
}
}
puts "static int fold_test(int *piCode)\{"
puts -nonewline " static int aLookup\[\] = \{"
for {set i 0} {$i < 70000} {incr i} {
set expected $i
catch { set expected $tl_lookup_table($i) }
set expected2 $expected
catch { set expected2 $extra($expected2) }
if {($i % 4)==0} { puts "" ; puts -nonewline " " }
puts -nonewline "$expected, $expected2, "
}
puts " \};"
puts " int i;"
puts " for(i=0; i<sizeof(aLookup)/sizeof(aLookup\[0\]); i++)\{"
puts " int iCode = (i/2);"
puts " int bFlag = i & 0x0001;"
puts " if( ${zFunc}\(iCode, bFlag)!=aLookup\[i\] )\{"
puts " *piCode = iCode;"
puts " return 1;"
puts " \}"
puts " \}"
puts " return 0;"
puts "\}"
}
proc print_fileheader {} {
puts [string trim {
/*
** 2012 May 25
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
******************************************************************************
*/
/*
** DO NOT EDIT THIS MACHINE GENERATED FILE.
*/
}]
puts ""
puts "#if !defined(SQLITE_DISABLE_FTS3_UNICODE)"
puts "#if defined(SQLITE_ENABLE_FTS3) || defined(SQLITE_ENABLE_FTS4)"
puts ""
puts "#include <assert.h>"
puts ""
}
proc print_test_main {} {
puts ""
puts "#include <stdio.h>"
puts ""
puts "int main(int argc, char **argv)\{"
puts " int r1, r2;"
puts " int code;"
puts " r1 = isalnum_test(&code);"
puts " if( r1 ) printf(\"isalnum(): Problem with code %d\\n\",code);"
puts " else printf(\"isalnum(): test passed\\n\");"
puts " r2 = fold_test(&code);"
puts " if( r2 ) printf(\"fold(): Problem with code %d\\n\",code);"
puts " else printf(\"fold(): test passed\\n\");"
puts " return (r1 || r2);"
puts "\}"
}
# Proces the command line arguments. Exit early if they are not to
# our liking.
#
proc usage {} {
puts -nonewline stderr "Usage: $::argv0 ?-test? "
puts stderr "<CaseFolding.txt file> <UnicodeData.txt file>"
exit 1
}
if {[llength $argv]!=2 && [llength $argv]!=3} usage
if {[llength $argv]==3 && [lindex $argv 0]!="-test"} usage
set unicodedata.txt [lindex $argv end]
set casefolding.txt [lindex $argv end-1]
set generate_test_code [expr {[llength $argv]==3}]
print_fileheader
# Print the isalnum() function to stdout.
#
set lRange [an_load_separator_ranges]
print_isalnum sqlite3FtsUnicodeIsalnum $lRange
# Leave a gap between the two generated C functions.
#
puts ""
puts ""
# Load the fold data. This is used by the [rd_XXX] commands
# as well as [print_fold].
tl_load_casefolding_txt ${casefolding.txt}
set mappings [rd_load_unicodedata_text ${unicodedata.txt}]
print_rd $mappings
puts ""
puts ""
print_isdiacritic sqlite3FtsUnicodeIsdiacritic $mappings
puts ""
puts ""
# Print the fold() function to stdout.
#
print_fold sqlite3FtsUnicodeFold
# Print the test routines and main() function to stdout, if -test
# was specified.
#
if {$::generate_test_code} {
print_test_isalnum sqlite3FtsUnicodeIsalnum $lRange
print_fold_test sqlite3FtsUnicodeFold $mappings
print_test_main
}
puts "#endif /* defined(SQLITE_ENABLE_FTS3) || defined(SQLITE_ENABLE_FTS4) */"
puts "#endif /* !defined(SQLITE_DISABLE_FTS3_UNICODE) */"
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