SQLite

#endif /* ifndef SQLITE_AMALGAMATION */

typedef struct unicode_tokenizer unicode_tokenizer;
typedef struct unicode_cursor unicode_cursor;

struct unicode_tokenizer {
  sqlite3_tokenizer base;
  int eRemoveDiacritic;
  int nException;
  int *aiException;
};

struct unicode_cursor {
  sqlite3_tokenizer_cursor base;
  const unsigned char *aInput;    /* Input text being tokenized */

  unicode_tokenizer *pNew;        /* New tokenizer object */
  int i;
  int rc = SQLITE_OK;

  pNew = (unicode_tokenizer *) sqlite3_malloc(sizeof(unicode_tokenizer));
  if( pNew==NULL ) return SQLITE_NOMEM;
  memset(pNew, 0, sizeof(unicode_tokenizer));
  pNew->eRemoveDiacritic = 1;

  for(i=0; rc==SQLITE_OK && i<nArg; i++){
    const char *z = azArg[i];
    int n = (int)strlen(z);

    if( n==19 && memcmp("remove_diacritics=1", z, 19)==0 ){
      pNew->eRemoveDiacritic = 1;
    }
    else if( n==19 && memcmp("remove_diacritics=0", z, 19)==0 ){
      pNew->eRemoveDiacritic = 0;
    }
    else if( n==19 && memcmp("remove_diacritics=2", z, 19)==0 ){
      pNew->eRemoveDiacritic = 2;
    }
    else if( n>=11 && memcmp("tokenchars=", z, 11)==0 ){
      rc = unicodeAddExceptions(pNew, 1, &z[11], n-11);
    }
    else if( n>=11 && memcmp("separators=", z, 11)==0 ){
      rc = unicodeAddExceptions(pNew, 0, &z[11], n-11);
    }

      zOut = &zNew[zOut - pCsr->zToken];
      pCsr->zToken = zNew;
      pCsr->nAlloc += 64;
    }

    /* Write the folded case of the last character read to the output */
    zEnd = z;
    iOut = sqlite3FtsUnicodeFold((int)iCode, p->eRemoveDiacritic);
    if( iOut ){
      WRITE_UTF8(zOut, iOut);
    }

    /* If the cursor is not at EOF, read the next character */
    if( z>=zTerm ) break;
    READ_UTF8(z, zTerm, iCode);

** If the argument is a codepoint corresponding to a lowercase letter
** in the ASCII range with a diacritic added, return the codepoint
** of the ASCII letter only. For example, if passed 235 - "LATIN
** SMALL LETTER E WITH DIAERESIS" - return 65 ("LATIN SMALL LETTER
** E"). The resuls of passing a codepoint that corresponds to an
** uppercase letter are undefined.
*/
static int remove_diacritic(int c, int bComplex){
  unsigned short aDia[] = {
        0,  1797,  1848,  1859,  1891,  1928,  1940,  1995, 
     2024,  2040,  2060,  2110,  2168,  2206,  2264,  2286, 
     2344,  2383,  2472,  2488,  2516,  2596,  2668,  2732, 
     2782,  2842,  2894,  2954,  2984,  3000,  3028,  3336, 
     3456,  3696,  3712,  3728,  3744,  3766,  3832,  3896, 
     3912,  3928,  3944,  3968,  4008,  4040,  4056,  4106, 
     4138,  4170,  4202,  4234,  4266,  4296,  4312,  4344, 
     4408,  4424,  4442,  4472,  4488,  4504,  6148,  6198, 
     6264,  6280,  6360,  6429,  6505,  6529, 61448, 61468, 
    61512, 61534, 61592, 61610, 61642, 61672, 61688, 61704, 
    61726, 61784, 61800, 61816, 61836, 61880, 61896, 61914, 
    61948, 61998, 62062, 62122, 62154, 62184, 62200, 62218, 
    62252, 62302, 62364, 62410, 62442, 62478, 62536, 62554, 
    62584, 62604, 62640, 62648, 62656, 62664, 62730, 62766, 
    62830, 62890, 62924, 62974, 63032, 63050, 63082, 63118, 
    63182, 63242, 63274, 63310, 63368, 63390, 
  };
  char aChar[] = {



    '\0',      'a'|0x00,  'c'|0x00,  'e'|0x00,  'i'|0x00,  'n'|0x00,  
    'o'|0x00,  'u'|0x00,  'y'|0x00,  'y'|0x00,  'a'|0x00,  'c'|0x00,  
    'd'|0x00,  'e'|0x00,  'e'|0x00,  'g'|0x00,  'h'|0x00,  'i'|0x00,  
    'j'|0x00,  'k'|0x00,  'l'|0x00,  'n'|0x00,  'o'|0x00,  'r'|0x00,  
    's'|0x00,  't'|0x00,  'u'|0x00,  'u'|0x00,  'w'|0x00,  'y'|0x00,  
    'z'|0x00,  'o'|0x00,  'u'|0x00,  'a'|0x00,  'i'|0x00,  'o'|0x00,  
    'u'|0x00,  'u'|0x80,  'a'|0x80,  'g'|0x00,  'k'|0x00,  'o'|0x00,  
    'o'|0x80,  'j'|0x00,  'g'|0x00,  'n'|0x00,  'a'|0x80,  'a'|0x00,  
    'e'|0x00,  'i'|0x00,  'o'|0x00,  'r'|0x00,  'u'|0x00,  's'|0x00,  
    't'|0x00,  'h'|0x00,  'a'|0x00,  'e'|0x00,  'o'|0x80,  'o'|0x00,  
    'o'|0x80,  'y'|0x00,  '\0',      '\0',      '\0',      '\0',      
    '\0',      '\0',      '\0',      '\0',      'a'|0x00,  'b'|0x00,  
    'c'|0x80,  'd'|0x00,  'd'|0x00,  'e'|0x80,  'e'|0x00,  'e'|0x80,  
    'f'|0x00,  'g'|0x00,  'h'|0x00,  'h'|0x00,  'i'|0x00,  'i'|0x80,  
    'k'|0x00,  'l'|0x00,  'l'|0x80,  'l'|0x00,  'm'|0x00,  'n'|0x00,  
    'o'|0x80,  'p'|0x00,  'r'|0x00,  'r'|0x80,  'r'|0x00,  's'|0x00,  
    's'|0x80,  't'|0x00,  'u'|0x00,  'u'|0x80,  'v'|0x00,  'w'|0x00,  
    'w'|0x00,  'x'|0x00,  'y'|0x00,  'z'|0x00,  'h'|0x00,  't'|0x00,  
    'w'|0x00,  'y'|0x00,  'a'|0x00,  'a'|0x80,  'a'|0x80,  'a'|0x80,  
    'e'|0x00,  'e'|0x80,  'e'|0x80,  'i'|0x00,  'o'|0x00,  'o'|0x80,  
    'o'|0x80,  'o'|0x80,  'u'|0x00,  'u'|0x80,  'u'|0x80,  'y'|0x00,  
  };

  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] );
  if( bComplex==0 && (aChar[iRes] & 0x80) ) return c;
  return (c > (aDia[iRes]>>3) + (aDia[iRes]&0x07)) ? c : ((int)aChar[iRes] & 0x7F);
}


/*
** Return true if the argument interpreted as a unicode codepoint
** is a diacritical modifier character.
*/

** is an upper case character that has a lower case equivalent,
** return the codepoint corresponding to the lower case version.
** Otherwise, return a copy of the argument.
**
** The results are undefined if the value passed to this function
** is less than zero.
*/
int sqlite3FtsUnicodeFold(int c, int eRemoveDiacritic){
  /* 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

    assert( iRes>=0 && c>=aEntry[iRes].iCode );
    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( eRemoveDiacritic ){
      ret = remove_diacritic(ret, eRemoveDiacritic==2);
    }
  }
  
  else if( c>=66560 && c<66600 ){
    ret = c + 40;
  }

  return ret;
}
#endif /* defined(SQLITE_ENABLE_FTS3) || defined(SQLITE_ENABLE_FTS4) */
#endif /* !defined(SQLITE_DISABLE_FTS3_UNICODE) */

source [file join [file dirname [info script]] parseunicode.tcl]

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]
  set fPrev   [lindex $map 0 2]

  foreach m [lrange $map 1 end] {
    foreach {i c f} $m {}

    if {$cPrev == $c && $fPrev==$f} {
      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
    lappend aFlag  $fPrev

    set iFirst $i
    set cPrev  $c
    set fPrev  $f
    set nRange 1
  }
  lappend lRange [list $iFirst $nRange]
  lappend aChar $cPrev
  lappend aFlag $fPrev

  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, int bComplex)\{"
  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 f $aFlag {
    if { $f } {
      set str "'$c'|0x80,  "
    } else {
      set str "'$c'|0x00,  "
    }
    if {$c == ""} { set str "'\\0',      " }

    if {($i % 6)==0} {puts "" ; puts -nonewline "    " }
    incr i
    puts -nonewline "$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] );
  if( bComplex==0 && (aChar[iRes] & 0x80) ) return c;
  return (c > (aDia[iRes]>>3) + (aDia[iRes]&0x07)) ? c : ((int)aChar[iRes] & 0x7F);}
  puts "\}"
}

proc print_isdiacritic {zFunc map} {

  set lCode [list]
  foreach m $map {
    foreach {code char flag} $m {}
    if {$flag} continue
    if {$code && $char == ""} { lappend lCode $code }
  }
  set lCode [lsort -integer $lCode]
  set iFirst [lindex $lCode 0]
  set iLast [lindex $lCode end]

  set i1 0

  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 eRemoveDiacritic)\{"

  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 
    } 

    assert( iRes>=0 && c>=aEntry[iRes].iCode );
    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( eRemoveDiacritic ){
      ret = ${::remove_diacritic}(ret, eRemoveDiacritic==2);
    }
  }
  }]

  foreach entry $lHigh {
    tl_print_if_entry $entry
  }

#--------------------------------------------------------------------------
# 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  0 }     (replace codepoint 224 to "a")
#   { 769 "" 0 }     (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.
#
# The third value in the list is always either 0 or 1. 0 if the 
# UnicodeData.txt file maps the codepoint to a single ASCII character and
# a diacritic, or 1 if the mapping is indirect. For example, consider the 
# two entries:
#
# 1ECD;LATIN SMALL LETTER O WITH DOT BELOW;Ll;0;L;006F 0323;;;;N;;;1ECC;;1ECC
# 1ED9;LATIN SMALL LETTER O WITH CIRCUMFLEX AND DOT BELOW;Ll;0;L;1ECD 0302;;;;N;;;1ED8;;1ED8
#
# The first codepoint is a direct mapping (as 006F is ASCII and 0323 is a 
# diacritic). The second is an indirect mapping, as it maps to the
# first codepoint plus 0302 (a diacritic).
#
proc rd_load_unicodedata_text {zName} {
  global tl_lookup_table

  set fd [open $zName]
  set lField {
    code

      continue
    }

    set iCode  [expr "0x$code"]
    set iAscii [expr "0x[lindex $character_decomposition_mapping 0]"]
    set iDia   [expr "0x[lindex $character_decomposition_mapping 1]"]

    # Filter out upper-case characters, as they will be mapped to their
    # lower-case equivalents before this data is used.
    if {[info exists tl_lookup_table($iCode)]} continue

    # Check if this is an indirect mapping. If so, set bIndirect to true
    # and change $iAscii to the indirectly mappped ASCII character.
    set bIndirect 0
    if {[info exists dia($iDia)] && [info exists mapping($iAscii)]} {
      set iAscii $mapping($iAscii)
      set bIndirect 1
    }

    if { ($iAscii >= 97 && $iAscii <= 122)
      || ($iAscii >= 65 && $iAscii <= 90)
    } {
      lappend lRet [list $iCode [string tolower [format %c $iAscii]] $bIndirect]
      set mapping($iCode) $iAscii
      set dia($iDia) 1
    }
  }

  foreach d [array names dia] {
    lappend lRet [list $d "" 0]
  }
  set lRet [lsort -integer -index 0 $lRet]

  close $fd
  set lRet
}

#endif /* ifndef SQLITE_AMALGAMATION */

typedef struct Unicode61Tokenizer Unicode61Tokenizer;
struct Unicode61Tokenizer {
  unsigned char aTokenChar[128];  /* ASCII range token characters */
  char *aFold;                    /* Buffer to fold text into */
  int nFold;                      /* Size of aFold[] in bytes */
  int eRemoveDiacritic;           /* True if remove_diacritics=1 is set */
  int nException;
  int *aiException;

  unsigned char aCategory[32];    /* True for token char categories */
};

/* Values for eRemoveDiacritic (must match internals of fts5_unicode2.c) */
#define FTS5_REMOVE_DIACRITICS_NONE    0
#define FTS5_REMOVE_DIACRITICS_SIMPLE  1
#define FTS5_REMOVE_DIACRITICS_COMPLEX 2

static int fts5UnicodeAddExceptions(
  Unicode61Tokenizer *p,          /* Tokenizer object */
  const char *z,                  /* Characters to treat as exceptions */
  int bTokenChars                 /* 1 for 'tokenchars', 0 for 'separators' */
){
  int rc = SQLITE_OK;

  }else{
    p = (Unicode61Tokenizer*)sqlite3_malloc(sizeof(Unicode61Tokenizer));
    if( p ){
      const char *zCat = "L* N* Co";
      int i;
      memset(p, 0, sizeof(Unicode61Tokenizer));

      p->eRemoveDiacritic = FTS5_REMOVE_DIACRITICS_SIMPLE;
      p->nFold = 64;
      p->aFold = sqlite3_malloc(p->nFold * sizeof(char));
      if( p->aFold==0 ){
        rc = SQLITE_NOMEM;
      }

      /* Search for a "categories" argument */
      for(i=0; rc==SQLITE_OK && i<nArg; i+=2){
        if( 0==sqlite3_stricmp(azArg[i], "categories") ){
          zCat = azArg[i+1];
        }
      }

      if( rc==SQLITE_OK ){
        rc = unicodeSetCategories(p, zCat);
      }

      for(i=0; rc==SQLITE_OK && i<nArg; i+=2){
        const char *zArg = azArg[i+1];
        if( 0==sqlite3_stricmp(azArg[i], "remove_diacritics") ){
          if( (zArg[0]!='0' && zArg[0]!='1' && zArg[0]!='2') || zArg[1] ){
            rc = SQLITE_ERROR;
          }else{
            p->eRemoveDiacritic = (zArg[0] - '0');
            assert( p->eRemoveDiacritic==FTS5_REMOVE_DIACRITICS_NONE
                 || p->eRemoveDiacritic==FTS5_REMOVE_DIACRITICS_SIMPLE
                 || p->eRemoveDiacritic==FTS5_REMOVE_DIACRITICS_COMPLEX
            );
          }

        }else
        if( 0==sqlite3_stricmp(azArg[i], "tokenchars") ){
          rc = fts5UnicodeAddExceptions(p, zArg, 1);
        }else
        if( 0==sqlite3_stricmp(azArg[i], "separators") ){
          rc = fts5UnicodeAddExceptions(p, zArg, 0);
        }else

      if( *zCsr & 0x80 ){
        /* An non-ascii-range character. Fold it into the output buffer if
        ** it is a token character, or break out of the loop if it is not. */
        READ_UTF8(zCsr, zTerm, iCode);
        if( fts5UnicodeIsAlnum(p,iCode)||sqlite3Fts5UnicodeIsdiacritic(iCode) ){
 non_ascii_tokenchar:
          iCode = sqlite3Fts5UnicodeFold(iCode, p->eRemoveDiacritic);
          if( iCode ) WRITE_UTF8(zOut, iCode);
        }else{
          break;
        }
      }else if( a[*zCsr]==0 ){
        /* An ascii-range separator character. End of token. */
        break; 

** If the argument is a codepoint corresponding to a lowercase letter
** in the ASCII range with a diacritic added, return the codepoint
** of the ASCII letter only. For example, if passed 235 - "LATIN
** SMALL LETTER E WITH DIAERESIS" - return 65 ("LATIN SMALL LETTER
** E"). The resuls of passing a codepoint that corresponds to an
** uppercase letter are undefined.
*/
static int fts5_remove_diacritic(int c, int bComplex){
  unsigned short aDia[] = {
        0,  1797,  1848,  1859,  1891,  1928,  1940,  1995, 
     2024,  2040,  2060,  2110,  2168,  2206,  2264,  2286, 
     2344,  2383,  2472,  2488,  2516,  2596,  2668,  2732, 
     2782,  2842,  2894,  2954,  2984,  3000,  3028,  3336, 
     3456,  3696,  3712,  3728,  3744,  3766,  3832,  3896, 
     3912,  3928,  3944,  3968,  4008,  4040,  4056,  4106, 
     4138,  4170,  4202,  4234,  4266,  4296,  4312,  4344, 
     4408,  4424,  4442,  4472,  4488,  4504,  6148,  6198, 
     6264,  6280,  6360,  6429,  6505,  6529, 61448, 61468, 
    61512, 61534, 61592, 61610, 61642, 61672, 61688, 61704, 
    61726, 61784, 61800, 61816, 61836, 61880, 61896, 61914, 
    61948, 61998, 62062, 62122, 62154, 62184, 62200, 62218, 
    62252, 62302, 62364, 62410, 62442, 62478, 62536, 62554, 
    62584, 62604, 62640, 62648, 62656, 62664, 62730, 62766, 
    62830, 62890, 62924, 62974, 63032, 63050, 63082, 63118, 
    63182, 63242, 63274, 63310, 63368, 63390, 
  };
  char aChar[] = {



    '\0',      'a'|0x00,  'c'|0x00,  'e'|0x00,  'i'|0x00,  'n'|0x00,  
    'o'|0x00,  'u'|0x00,  'y'|0x00,  'y'|0x00,  'a'|0x00,  'c'|0x00,  
    'd'|0x00,  'e'|0x00,  'e'|0x00,  'g'|0x00,  'h'|0x00,  'i'|0x00,  
    'j'|0x00,  'k'|0x00,  'l'|0x00,  'n'|0x00,  'o'|0x00,  'r'|0x00,  
    's'|0x00,  't'|0x00,  'u'|0x00,  'u'|0x00,  'w'|0x00,  'y'|0x00,  
    'z'|0x00,  'o'|0x00,  'u'|0x00,  'a'|0x00,  'i'|0x00,  'o'|0x00,  
    'u'|0x00,  'u'|0x80,  'a'|0x80,  'g'|0x00,  'k'|0x00,  'o'|0x00,  
    'o'|0x80,  'j'|0x00,  'g'|0x00,  'n'|0x00,  'a'|0x80,  'a'|0x00,  
    'e'|0x00,  'i'|0x00,  'o'|0x00,  'r'|0x00,  'u'|0x00,  's'|0x00,  
    't'|0x00,  'h'|0x00,  'a'|0x00,  'e'|0x00,  'o'|0x80,  'o'|0x00,  
    'o'|0x80,  'y'|0x00,  '\0',      '\0',      '\0',      '\0',      
    '\0',      '\0',      '\0',      '\0',      'a'|0x00,  'b'|0x00,  
    'c'|0x80,  'd'|0x00,  'd'|0x00,  'e'|0x80,  'e'|0x00,  'e'|0x80,  
    'f'|0x00,  'g'|0x00,  'h'|0x00,  'h'|0x00,  'i'|0x00,  'i'|0x80,  
    'k'|0x00,  'l'|0x00,  'l'|0x80,  'l'|0x00,  'm'|0x00,  'n'|0x00,  
    'o'|0x80,  'p'|0x00,  'r'|0x00,  'r'|0x80,  'r'|0x00,  's'|0x00,  
    's'|0x80,  't'|0x00,  'u'|0x00,  'u'|0x80,  'v'|0x00,  'w'|0x00,  
    'w'|0x00,  'x'|0x00,  'y'|0x00,  'z'|0x00,  'h'|0x00,  't'|0x00,  
    'w'|0x00,  'y'|0x00,  'a'|0x00,  'a'|0x80,  'a'|0x80,  'a'|0x80,  
    'e'|0x00,  'e'|0x80,  'e'|0x80,  'i'|0x00,  'o'|0x00,  'o'|0x80,  
    'o'|0x80,  'o'|0x80,  'u'|0x00,  'u'|0x80,  'u'|0x80,  'y'|0x00,  
  };

  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] );
  if( bComplex==0 && (aChar[iRes] & 0x80) ) return c;
  return (c > (aDia[iRes]>>3) + (aDia[iRes]&0x07)) ? c : ((int)aChar[iRes] & 0x7F);
}


/*
** Return true if the argument interpreted as a unicode codepoint
** is a diacritical modifier character.
*/

** is an upper case character that has a lower case equivalent,
** return the codepoint corresponding to the lower case version.
** Otherwise, return a copy of the argument.
**
** The results are undefined if the value passed to this function
** is less than zero.
*/
int sqlite3Fts5UnicodeFold(int c, int eRemoveDiacritic){
  /* 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

    assert( iRes>=0 && c>=aEntry[iRes].iCode );
    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( eRemoveDiacritic ){
      ret = fts5_remove_diacritic(ret, eRemoveDiacritic==2);
    }
  }
  
  else if( c>=66560 && c<66600 ){
    ret = c + 40;
  }

  return ret;
}



int sqlite3Fts5UnicodeNCat(void) { 
  return 32;
}


int sqlite3Fts5UnicodeCatParse(const char *zCat, u8 *aArray){ 
  aArray[0] = 1;
  switch( zCat[0] ){
    case 'C':
          switch( zCat[1] ){
            case 'c': aArray[1] = 1; break;

void sqlite3Fts5UnicodeAscii(u8 *aArray, u8 *aAscii){
  int i = 0;
  int iTbl = 0;
  while( i<128 ){
    int bToken = aArray[ aFts5UnicodeData[iTbl] & 0x1F ];
    int n = (aFts5UnicodeData[iTbl] >> 5) + i;
    for(; i<128 && i<n; i++){
      aAscii[i] = bToken;
    }
    iTbl++;
  }
}

  CREATE VIRTUAL TABLE a3 USING fts5(x, y, tokenize = 'unicode61 tokenchars');
} {1 {error in tokenizer constructor}}
do_catchsql_test 6.2 {
  CREATE VIRTUAL TABLE a3 USING fts5(x, y, tokenize = 'unicode61 a b');
} {1 {error in tokenizer constructor}}
do_catchsql_test 6.3 {
  CREATE VIRTUAL TABLE a3 USING fts5(
    x, y, tokenize = 'unicode61 remove_diacritics 3'
  );
} {1 {error in tokenizer constructor}}
do_catchsql_test 6.4 {
  CREATE VIRTUAL TABLE a3 USING fts5(
    x, y, tokenize = 'unicode61 remove_diacritics 10'
  );
} {1 {error in tokenizer constructor}}

# 2014 June 17
#
# 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.
#
#*************************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script is testing the FTS5 module.
#

source [file join [file dirname [info script]] fts5_common.tcl]
set testprefix fts5umlaut

# If SQLITE_ENABLE_FTS5 is not defined, omit this file.
ifcapable !fts5 {
  finish_test
  return
}

do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE t1 USING fts5(x);
  CREATE VIRTUAL TABLE t2 USING fts5(
      x, 
      tokenize="unicode61 remove_diacritics 2"
  );
}

foreach {tn q res1 res2} {
  1 "Hà Nội"                  0 1
  2 "Hà Noi"                  1 1
  3 "Ha Noi"                  1 1
  4 "Ha N\u1ed9i"             0 1
  5 "Ha N\u006fi"             1 1
  6 "Ha N\u006f\u0302i"       1 1
  7 "Ha N\u006f\u0323\u0302i" 1 1
} {
  do_execsql_test 1.$tn.1 {
    DELETE FROM t1;
    INSERT INTO t1(rowid, x) VALUES (1, 'Ha Noi');
    SELECT count(*) FROM t1($q)
  } $res1
  do_execsql_test 1.$tn.2 {
    DELETE FROM t1;
    INSERT INTO t1(rowid, x) VALUES (1, $q);
    SELECT count(*) FROM t1('Ha Noi')
  } $res1

  do_execsql_test 1.$tn.2 {
    DELETE FROM t2;
    INSERT INTO t2(rowid, x) VALUES (1, 'Ha Noi');
    SELECT count(*) FROM t2($q)
  } $res2
  do_execsql_test 1.$tn.2 {
    DELETE FROM t2;
    INSERT INTO t2(rowid, x) VALUES (1, $q);
    SELECT count(*) FROM t2('Ha Noi')
  } $res2
}

finish_test

tl_load_casefolding_txt $CF
foreach x [an_load_unicodedata_text $UD] {
  set aNotAlnum($x) 1
}

foreach {y} [rd_load_unicodedata_text $UD] {
  foreach {code ascii f} $y {}
  if {$ascii==""} {
    set int 0
  } else {
    binary scan $ascii c int
  }
  set aDiacritic($code,$f) $int
  if {$f==0} { set aDiacritic($code,1) $int }
}

proc tcl_fold {i {bRemoveDiacritic 0}} {
  global tl_lookup_table
  global aDiacritic
  set f [expr $bRemoveDiacritic==2]

  if {[info exists tl_lookup_table($i)]} {
    set i $tl_lookup_table($i)
  }
  if {$bRemoveDiacritic && [info exists aDiacritic($i,$f)]} {
    set i $aDiacritic($i,$f)
  }
  expr $i
}
db func tcl_fold tcl_fold

proc tcl_isalnum {i} {
  global aNotAlnum

    SELECT -1
    UNION ALL
    SELECT i+1 FROM ii WHERE i<100000
  )
  SELECT count(*), min(i) FROM ii WHERE fts5_fold(i)!=CAST(tcl_fold(i) AS int);
} {0 {}}

do_execsql_test 1.2.1 {
  WITH ii(i) AS (
    SELECT -1
    UNION ALL
    SELECT i+1 FROM ii WHERE i<100000
  )
  SELECT count(*), min(i) FROM ii 
  WHERE fts5_fold(i,1)!=CAST(tcl_fold(i,1) AS int);
} {0 {}}

do_execsql_test 1.2.2 {
  WITH ii(i) AS (
    SELECT -1
    UNION ALL
    SELECT i+1 FROM ii WHERE i<100000
  )
  SELECT count(*), min(i) FROM ii 
  WHERE fts5_fold(i,2)!=CAST(tcl_fold(i,2) AS int);
} {0 {}}

do_execsql_test 1.3 {
  WITH ii(i) AS (
    SELECT -1
    UNION ALL
    SELECT i+1 FROM ii WHERE i<100000
  )

# 2018 December 3
#
# 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.
#
#*************************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script is testing the FTS5 module.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix fts4umlaut

ifcapable !fts3 {
  finish_test
  return
}

do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE t1 USING fts5(x);
  CREATE VIRTUAL TABLE t2 USING fts4(
      x, 
      tokenize=unicode61 "remove_diacritics=2"
  );
}

foreach {tn q res1 res2} {
  1 "Hà Nội"                  0 1
  2 "Hà Noi"                  1 1
  3 "Ha Noi"                  1 1
  4 "Ha N\u1ed9i"             0 1
  5 "Ha N\u006fi"             1 1
  6 "Ha N\u006f\u0302i"       1 1
  7 "Ha N\u006f\u0323\u0302i" 1 1
} {
  do_execsql_test 1.$tn.1 {
    DELETE FROM t1;
    INSERT INTO t1(rowid, x) VALUES (1, 'Ha Noi');
    SELECT count(*) FROM t1 WHERE t1 MATCH $q
  } $res1
  do_execsql_test 1.$tn.2 {
    DELETE FROM t1;
    INSERT INTO t1(rowid, x) VALUES (1, $q);
    SELECT count(*) FROM t1 WHERE t1 MATCH 'Ha Noi'
  } $res1

  do_execsql_test 1.$tn.2 {
    DELETE FROM t2;
    INSERT INTO t2(rowid, x) VALUES (1, 'Ha Noi');
    SELECT count(*) FROM t2 WHERE t2 MATCH $q
  } $res2
  do_execsql_test 1.$tn.2 {
    DELETE FROM t2;
    INSERT INTO t2(rowid, x) VALUES (1, $q);
    SELECT count(*) FROM t2 WHERE t2 MATCH 'Ha Noi'
  } $res2
}

finish_test