diff -r 4a65cc85c4f3 -r fbd95db6a4e1 engine/sqlite/src/func.cpp
--- a/engine/sqlite/src/func.cpp	Wed Apr 28 13:20:05 2010 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1575 +0,0 @@
-/*
-** 2002 February 23
-**
-** 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 contains the C functions that implement various SQL
-** functions of SQLite.  
-**
-** There is only one exported symbol in this file - the function
-** sqliteRegisterBuildinFunctions() found at the bottom of the file.
-** All other code has file scope.
-**
-** $Id: func.cpp 1282 2008-11-13 09:31:33Z LarsPson $
-*/
-#include "sqliteInt.h"
-#include <ctype.h>
-#include <stdlib.h>
-#include <assert.h>
-#include "vdbeInt.h"
-
-
-/*
-** Return the collating function associated with a function.
-*/
-static CollSeq *sqlite3GetFuncCollSeq(sqlite3_context *context){
-  return context->pColl;
-}
-
-/*
-** Implementation of the non-aggregate min() and max() functions
-*/
-static void minmaxFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  int i;
-  int mask;    /* 0 for min() or 0xffffffff for max() */
-  int iBest;
-  CollSeq *pColl;
-
-  if( argc==0 ) return;
-  mask = sqlite3_user_data(context)==0 ? 0 : -1;
-  pColl = sqlite3GetFuncCollSeq(context);
-  assert( pColl );
-  assert( mask==-1 || mask==0 );
-  iBest = 0;
-  if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
-  for(i=1; i<argc; i++){
-    if( sqlite3_value_type(argv[i])==SQLITE_NULL ) return;
-    if( (sqlite3MemCompare(argv[iBest], argv[i], pColl)^mask)>=0 ){
-      iBest = i;
-    }
-  }
-  sqlite3_result_value(context, argv[iBest]);
-}
-
-/*
-** Return the type of the argument.
-*/
-static void typeofFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  const char *z = 0;
-  switch( sqlite3_value_type(argv[0]) ){
-    case SQLITE_NULL:    z = "null";    break;
-    case SQLITE_INTEGER: z = "integer"; break;
-    case SQLITE_TEXT:    z = "text";    break;
-    case SQLITE_FLOAT:   z = "real";    break;
-    case SQLITE_BLOB:    z = "blob";    break;
-  }
-  sqlite3_result_text(context, z, -1, SQLITE_STATIC);
-}
-
-
-/*
-** Implementation of the length() function
-*/
-static void lengthFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  int len;
-
-  assert( argc==1 );
-  switch( sqlite3_value_type(argv[0]) ){
-    case SQLITE_BLOB:
-    case SQLITE_INTEGER:
-    case SQLITE_FLOAT: {
-      sqlite3_result_int(context, sqlite3_value_bytes(argv[0]));
-      break;
-    }
-    case SQLITE_TEXT: {
-      const unsigned char *z = sqlite3_value_text(argv[0]);
-      if( z==0 ) return;
-      len = 0;
-      while( *z ){
-        len++;
-        SQLITE_SKIP_UTF8(z);
-      }
-      sqlite3_result_int(context, len);
-      break;
-    }
-    default: {
-      sqlite3_result_null(context);
-      break;
-    }
-  }
-}
-
-/*
-** Implementation of the abs() function
-*/
-static void absFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
-  assert( argc==1 );
-  switch( sqlite3_value_type(argv[0]) ){
-    case SQLITE_INTEGER: {
-      i64 iVal = sqlite3_value_int64(argv[0]);
-      if( iVal<0 ){
-        if( (iVal<<1)==0 ){
-          sqlite3_result_error(context, "integer overflow", -1);
-          return;
-        }
-        iVal = -iVal;
-      } 
-      sqlite3_result_int64(context, iVal);
-      break;
-    }
-    case SQLITE_NULL: {
-      sqlite3_result_null(context);
-      break;
-    }
-    default: {
-      double rVal = sqlite3_value_double(argv[0]);
-      if( rVal<0 ) rVal = -rVal;
-      sqlite3_result_double(context, rVal);
-      break;
-    }
-  }
-}
-
-/*
-** Implementation of the substr() function.
-**
-** substr(x,p1,p2)  returns p2 characters of x[] beginning with p1.
-** p1 is 1-indexed.  So substr(x,1,1) returns the first character
-** of x.  If x is text, then we actually count UTF-8 characters.
-** If x is a blob, then we count bytes.
-**
-** If p1 is negative, then we begin abs(p1) from the end of x[].
-*/
-static void substrFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  const unsigned char *z;
-  const unsigned char *z2;
-  int len;
-  int p0type;
-  i64 p1, p2;
-
-  assert( argc==3 || argc==2 );
-  p0type = sqlite3_value_type(argv[0]);
-  if( p0type==SQLITE_BLOB ){
-    len = sqlite3_value_bytes(argv[0]);
-    z = (const unsigned char*)sqlite3_value_blob(argv[0]);
-    if( z==0 ) return;
-    assert( len==sqlite3_value_bytes(argv[0]) );
-  }else{
-    z = sqlite3_value_text(argv[0]);
-    if( z==0 ) return;
-    len = 0;
-    for(z2=z; *z2; len++){
-      SQLITE_SKIP_UTF8(z2);
-    }
-  }
-  p1 = sqlite3_value_int(argv[1]);
-  if( argc==3 ){
-    p2 = sqlite3_value_int(argv[2]);
-  }else{
-    p2 = SQLITE_MAX_LENGTH;
-  }
-  if( p1<0 ){
-    p1 += len;
-    if( p1<0 ){
-      p2 += p1;
-      p1 = 0;
-    }
-  }else if( p1>0 ){
-    p1--;
-  }
-  if( p1+p2>len ){
-    p2 = len-p1;
-  }
-  if( p0type!=SQLITE_BLOB ){
-    while( *z && p1 ){
-      SQLITE_SKIP_UTF8(z);
-      p1--;
-    }
-    for(z2=z; *z2 && p2; p2--){
-      SQLITE_SKIP_UTF8(z2);
-    }
-    sqlite3_result_text(context, (char*)z, z2-z, SQLITE_TRANSIENT);
-  }else{
-    if( p2<0 ) p2 = 0;
-    sqlite3_result_blob(context, (char*)&z[p1], p2, SQLITE_TRANSIENT);
-  }
-}
-
-/*
-** Implementation of the round() function
-*/
-static void roundFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
-  int n = 0;
-  double r;
-  char zBuf[500];  /* larger than the %f representation of the largest double */
-  assert( argc==1 || argc==2 );
-  if( argc==2 ){
-    if( SQLITE_NULL==sqlite3_value_type(argv[1]) ) return;
-    n = sqlite3_value_int(argv[1]);
-    if( n>30 ) n = 30;
-    if( n<0 ) n = 0;
-  }
-  if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
-  r = sqlite3_value_double(argv[0]);
-  sqlite3_snprintf(sizeof(zBuf),zBuf,"%.*f",n,r);
-  sqlite3AtoF(zBuf, &r);
-  sqlite3_result_double(context, r);
-}
-
-/*
-** Allocate nByte bytes of space using sqlite3_malloc(). If the
-** allocation fails, call sqlite3_result_error_nomem() to notify
-** the database handle that malloc() has failed.
-*/
-static void *contextMalloc(sqlite3_context *context, int nByte){
-  char *z = (char*)sqlite3_malloc(nByte);
-  if( !z && nByte>0 ){
-    sqlite3_result_error_nomem(context);
-  }
-  return z;
-}
-
-/*
-** Implementation of the upper() and lower() SQL functions.
-*/
-static void upperFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
-  char *z1;
-  const char *z2;
-  int i, n;
-  if( argc<1 || SQLITE_NULL==sqlite3_value_type(argv[0]) ) return;
-  z2 = (char*)sqlite3_value_text(argv[0]);
-  n = sqlite3_value_bytes(argv[0]);
-  /* Verify that the call to _bytes() does not invalidate the _text() pointer */
-  assert( z2==(char*)sqlite3_value_text(argv[0]) );
-  if( z2 ){
-    z1 = (char*)contextMalloc(context, n+1);
-    if( z1 ){
-      memcpy(z1, z2, n+1);
-      for(i=0; z1[i]; i++){
-        z1[i] = toupper(z1[i]);
-      }
-      sqlite3_result_text(context, z1, -1, sqlite3_free);
-    }
-  }
-}
-static void lowerFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
-  char *z1;
-  const char *z2;
-  int i, n;
-  if( argc<1 || SQLITE_NULL==sqlite3_value_type(argv[0]) ) return;
-  z2 = (char*)sqlite3_value_text(argv[0]);
-  n = sqlite3_value_bytes(argv[0]);
-  /* Verify that the call to _bytes() does not invalidate the _text() pointer */
-  assert( z2==(char*)sqlite3_value_text(argv[0]) );
-  if( z2 ){
-    z1 = (char*)contextMalloc(context, n+1);
-    if( z1 ){
-      memcpy(z1, z2, n+1);
-      for(i=0; z1[i]; i++){
-        z1[i] = tolower(z1[i]);
-      }
-      sqlite3_result_text(context, z1, -1, sqlite3_free);
-    }
-  }
-}
-
-/*
-** Implementation of the IFNULL(), NVL(), and COALESCE() functions.  
-** All three do the same thing.  They return the first non-NULL
-** argument.
-*/
-static void ifnullFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  int i;
-  for(i=0; i<argc; i++){
-    if( SQLITE_NULL!=sqlite3_value_type(argv[i]) ){
-      sqlite3_result_value(context, argv[i]);
-      break;
-    }
-  }
-}
-
-/*
-** Implementation of random().  Return a random integer.  
-*/
-static void randomFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  sqlite_int64 r;
-  sqlite3Randomness(sizeof(r), &r);
-  if( (r<<1)==0 ) r = 0;  /* Prevent 0x8000.... as the result so that we */
-                          /* can always do abs() of the result */
-  sqlite3_result_int64(context, r);
-}
-
-/*
-** Implementation of randomblob(N).  Return a random blob
-** that is N bytes long.
-*/
-static void randomBlob(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  int n;
-  unsigned char *p;
-  assert( argc==1 );
-  n = sqlite3_value_int(argv[0]);
-  if( n<1 ){
-    n = 1;
-  }
-  if( n>SQLITE_MAX_LENGTH ){
-    sqlite3_result_error_toobig(context);
-    return;
-  }
-  p = (unsigned char*)contextMalloc(context, n);
-  if( p ){
-    sqlite3Randomness(n, p);
-    sqlite3_result_blob(context, (char*)p, n, sqlite3_free);
-  }
-}
-
-/*
-** Implementation of the last_insert_rowid() SQL function.  The return
-** value is the same as the sqlite3_last_insert_rowid() API function.
-*/
-static void last_insert_rowid(
-  sqlite3_context *context, 
-  int arg, 
-  sqlite3_value **argv
-){
-  sqlite3 *db = (sqlite3*)sqlite3_user_data(context);
-  sqlite3_result_int64(context, sqlite3_last_insert_rowid(db));
-}
-
-/*
-** Implementation of the changes() SQL function.  The return value is the
-** same as the sqlite3_changes() API function.
-*/
-static void changes(
-  sqlite3_context *context,
-  int arg,
-  sqlite3_value **argv
-){
-  sqlite3 *db = (sqlite3*)sqlite3_user_data(context);
-  sqlite3_result_int(context, sqlite3_changes(db));
-}
-
-/*
-** Implementation of the total_changes() SQL function.  The return value is
-** the same as the sqlite3_total_changes() API function.
-*/
-static void total_changes(
-  sqlite3_context *context,
-  int arg,
-  sqlite3_value **argv
-){
-  sqlite3 *db = (sqlite3*)sqlite3_user_data(context);
-  sqlite3_result_int(context, sqlite3_total_changes(db));
-}
-
-/*
-** A structure defining how to do GLOB-style comparisons.
-*/
-struct compareInfo {
-  u8 matchAll;
-  u8 matchOne;
-  u8 matchSet;
-  u8 noCase;
-};
-
-/*
-** For LIKE and GLOB matching on EBCDIC machines, assume that every
-** character is exactly one byte in size.  Also, all characters are
-** able to participate in upper-case-to-lower-case mappings in EBCDIC
-** whereas only characters less than 0x80 do in ASCII.
-*/
-#if defined(SQLITE_EBCDIC)
-# define sqlite3Utf8Read(A,B,C)  (*(A++))
-# define GlogUpperToLower(A)     A = sqlite3UpperToLower[A]
-#else
-# define GlogUpperToLower(A)     if( A<0x80 ){ A = sqlite3UpperToLower[A]; }
-#endif
-
-static const struct compareInfo globInfo = { '*', '?', '[', 0 };
-/* The correct SQL-92 behavior is for the LIKE operator to ignore
-** case.  Thus  'a' LIKE 'A' would be true. */
-static const struct compareInfo likeInfoNorm = { '%', '_',   0, 1 };
-/* If SQLITE_CASE_SENSITIVE_LIKE is defined, then the LIKE operator
-** is case sensitive causing 'a' LIKE 'A' to be false */
-static const struct compareInfo likeInfoAlt = { '%', '_',   0, 0 };
-
-/*
-** Compare two UTF-8 strings for equality where the first string can
-** potentially be a "glob" expression.  Return true (1) if they
-** are the same and false (0) if they are different.
-**
-** Globbing rules:
-**
-**      '*'       Matches any sequence of zero or more characters.
-**
-**      '?'       Matches exactly one character.
-**
-**     [...]      Matches one character from the enclosed list of
-**                characters.
-**
-**     [^...]     Matches one character not in the enclosed list.
-**
-** With the [...] and [^...] matching, a ']' character can be included
-** in the list by making it the first character after '[' or '^'.  A
-** range of characters can be specified using '-'.  Example:
-** "[a-z]" matches any single lower-case letter.  To match a '-', make
-** it the last character in the list.
-**
-** This routine is usually quick, but can be N**2 in the worst case.
-**
-** Hints: to match '*' or '?', put them in "[]".  Like this:
-**
-**         abc[*]xyz        Matches "abc*xyz" only
-*/
-static int patternCompare(
-  const u8 *zPattern,              /* The glob pattern */
-  const u8 *zString,               /* The string to compare against the glob */
-  const struct compareInfo *pInfo, /* Information about how to do the compare */
-  const int esc                    /* The escape character */
-){
-  int c, c2;
-  int invert;
-  int seen;
-  u8 matchOne = pInfo->matchOne;
-  u8 matchAll = pInfo->matchAll;
-  u8 matchSet = pInfo->matchSet;
-  u8 noCase = pInfo->noCase; 
-  int prevEscape = 0;     /* True if the previous character was 'escape' */
-
-  while( (c = sqlite3Utf8Read(zPattern,0,&zPattern))!=0 ){
-    if( !prevEscape && c==matchAll ){
-      while( (c=sqlite3Utf8Read(zPattern,0,&zPattern)) == matchAll
-               || c == matchOne ){
-        if( c==matchOne && sqlite3Utf8Read(zString, 0, &zString)==0 ){
-          return 0;
-        }
-      }
-      if( c==0 ){
-        return 1;
-      }else if( c==esc ){
-        c = sqlite3Utf8Read(zPattern, 0, &zPattern);
-        if( c==0 ){
-          return 0;
-        }
-      }else if( c==matchSet ){
-        assert( esc==0 );         /* This is GLOB, not LIKE */
-        assert( matchSet<0x80 );  /* '[' is a single-byte character */
-        while( *zString && patternCompare(&zPattern[-1],zString,pInfo,esc)==0 ){
-          SQLITE_SKIP_UTF8(zString);
-        }
-        return *zString!=0;
-      }
-      while( (c2 = sqlite3Utf8Read(zString,0,&zString))!=0 ){
-        if( noCase ){
-          GlogUpperToLower(c2);
-          GlogUpperToLower(c);
-          while( c2 != 0 && c2 != c ){
-            c2 = sqlite3Utf8Read(zString, 0, &zString);
-            GlogUpperToLower(c2);
-          }
-        }else{
-          while( c2 != 0 && c2 != c ){
-            c2 = sqlite3Utf8Read(zString, 0, &zString);
-          }
-        }
-        if( c2==0 ) return 0;
-        if( patternCompare(zPattern,zString,pInfo,esc) ) return 1;
-      }
-      return 0;
-    }else if( !prevEscape && c==matchOne ){
-      if( sqlite3Utf8Read(zString, 0, &zString)==0 ){
-        return 0;
-      }
-    }else if( c==matchSet ){
-      int prior_c = 0;
-      assert( esc==0 );    /* This only occurs for GLOB, not LIKE */
-      seen = 0;
-      invert = 0;
-      c = sqlite3Utf8Read(zString, 0, &zString);
-      if( c==0 ) return 0;
-      c2 = sqlite3Utf8Read(zPattern, 0, &zPattern);
-      if( c2=='^' ){
-        invert = 1;
-        c2 = sqlite3Utf8Read(zPattern, 0, &zPattern);
-      }
-      if( c2==']' ){
-        if( c==']' ) seen = 1;
-        c2 = sqlite3Utf8Read(zPattern, 0, &zPattern);
-      }
-      while( c2 && c2!=']' ){
-        if( c2=='-' && zPattern[0]!=']' && zPattern[0]!=0 && prior_c>0 ){
-          c2 = sqlite3Utf8Read(zPattern, 0, &zPattern);
-          if( c>=prior_c && c<=c2 ) seen = 1;
-          prior_c = 0;
-        }else{
-          if( c==c2 ){
-            seen = 1;
-          }
-          prior_c = c2;
-        }
-        c2 = sqlite3Utf8Read(zPattern, 0, &zPattern);
-      }
-      if( c2==0 || (seen ^ invert)==0 ){
-        return 0;
-      }
-    }else if( esc==c && !prevEscape ){
-      prevEscape = 1;
-    }else{
-      c2 = sqlite3Utf8Read(zString, 0, &zString);
-      if( noCase ){
-        GlogUpperToLower(c);
-        GlogUpperToLower(c2);
-      }
-      if( c!=c2 ){
-        return 0;
-      }
-      prevEscape = 0;
-    }
-  }
-  return *zString==0;
-}
-
-/*
-** Count the number of times that the LIKE operator (or GLOB which is
-** just a variation of LIKE) gets called.  This is used for testing
-** only.
-*/
-#ifdef SQLITE_TEST
-int sqlite3_like_count = 0;
-#endif
-
-
-/*
-** Implementation of the like() SQL function.  This function implements
-** the build-in LIKE operator.  The first argument to the function is the
-** pattern and the second argument is the string.  So, the SQL statements:
-**
-**       A LIKE B
-**
-** is implemented as like(B,A).
-**
-** This same function (with a different compareInfo structure) computes
-** the GLOB operator.
-*/
-static void likeFunc(
-  sqlite3_context *context, 
-  int argc, 
-  sqlite3_value **argv
-){
-  const unsigned char *zA, *zB;
-  int escape = 0;
-
-  zB = sqlite3_value_text(argv[0]);
-  zA = sqlite3_value_text(argv[1]);
-
-  /* Limit the length of the LIKE or GLOB pattern to avoid problems
-  ** of deep recursion and N*N behavior in patternCompare().
-  */
-  if( sqlite3_value_bytes(argv[0])>SQLITE_MAX_LIKE_PATTERN_LENGTH ){
-    sqlite3_result_error(context, "LIKE or GLOB pattern too complex", -1);
-    return;
-  }
-  assert( zB==sqlite3_value_text(argv[0]) );  /* Encoding did not change */
-
-  if( argc==3 ){
-    /* The escape character string must consist of a single UTF-8 character.
-    ** Otherwise, return an error.
-    */
-    const unsigned char *zEsc = sqlite3_value_text(argv[2]);
-    if( zEsc==0 ) return;
-    if( sqlite3Utf8CharLen((char*)zEsc, -1)!=1 ){
-      sqlite3_result_error(context, 
-          "ESCAPE expression must be a single character", -1);
-      return;
-    }
-    escape = sqlite3Utf8Read(zEsc, 0, &zEsc);
-  }
-  if( zA && zB ){
-    compareInfo *pInfo = (compareInfo*)sqlite3_user_data(context);
-#ifdef SQLITE_TEST
-    sqlite3_like_count++;
-#endif
-    
-    sqlite3_result_int(context, patternCompare(zB, zA, pInfo, escape));
-  }
-}
-
-/*
-** Implementation of the NULLIF(x,y) function.  The result is the first
-** argument if the arguments are different.  The result is NULL if the
-** arguments are equal to each other.
-*/
-static void nullifFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  CollSeq *pColl = sqlite3GetFuncCollSeq(context);
-  if( sqlite3MemCompare(argv[0], argv[1], pColl)!=0 ){
-    sqlite3_result_value(context, argv[0]);
-  }
-}
-
-/*
-** Implementation of the VERSION(*) function.  The result is the version
-** of the SQLite library that is running.
-*/
-static void versionFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  sqlite3_result_text(context, sqlite3_version, -1, SQLITE_STATIC);
-}
-
-/* Array for converting from half-bytes (nybbles) into ASCII hex
-** digits. */
-static const char hexdigits[] = {
-  '0', '1', '2', '3', '4', '5', '6', '7',
-  '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' 
-};
-
-/*
-** EXPERIMENTAL - This is not an official function.  The interface may
-** change.  This function may disappear.  Do not write code that depends
-** on this function.
-**
-** Implementation of the QUOTE() function.  This function takes a single
-** argument.  If the argument is numeric, the return value is the same as
-** the argument.  If the argument is NULL, the return value is the string
-** "NULL".  Otherwise, the argument is enclosed in single quotes with
-** single-quote escapes.
-*/
-static void quoteFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
-  if( argc<1 ) return;
-  switch( sqlite3_value_type(argv[0]) ){
-    case SQLITE_NULL: {
-      sqlite3_result_text(context, "NULL", 4, SQLITE_STATIC);
-      break;
-    }
-    case SQLITE_INTEGER:
-    case SQLITE_FLOAT: {
-      sqlite3_result_value(context, argv[0]);
-      break;
-    }
-    case SQLITE_BLOB: {
-      char *zText = 0;
-      char const *zBlob = (const char*)sqlite3_value_blob(argv[0]);
-      int nBlob = sqlite3_value_bytes(argv[0]);
-      assert( zBlob==sqlite3_value_blob(argv[0]) ); /* No encoding change */
-
-      if( 2*nBlob+4>SQLITE_MAX_LENGTH ){
-        sqlite3_result_error_toobig(context);
-        return;
-      }
-      zText = (char *)contextMalloc(context, (2*nBlob)+4); 
-      if( zText ){
-        int i;
-        for(i=0; i<nBlob; i++){
-          zText[(i*2)+2] = hexdigits[(zBlob[i]>>4)&0x0F];
-          zText[(i*2)+3] = hexdigits[(zBlob[i])&0x0F];
-        }
-        zText[(nBlob*2)+2] = '\'';
-        zText[(nBlob*2)+3] = '\0';
-        zText[0] = 'X';
-        zText[1] = '\'';
-        sqlite3_result_text(context, zText, -1, SQLITE_TRANSIENT);
-        sqlite3_free(zText);
-      }
-      break;
-    }
-    case SQLITE_TEXT: {
-      int i,j;
-      u64 n;
-      const unsigned char *zArg = sqlite3_value_text(argv[0]);
-      char *z;
-
-      if( zArg==0 ) return;
-      for(i=0, n=0; zArg[i]; i++){ if( zArg[i]=='\'' ) n++; }
-      if( i+n+3>SQLITE_MAX_LENGTH ){
-        sqlite3_result_error_toobig(context);
-        return;
-      }
-      z = (char*)contextMalloc(context, i+n+3);
-      if( z ){
-        z[0] = '\'';
-        for(i=0, j=1; zArg[i]; i++){
-          z[j++] = zArg[i];
-          if( zArg[i]=='\'' ){
-            z[j++] = '\'';
-          }
-        }
-        z[j++] = '\'';
-        z[j] = 0;
-        sqlite3_result_text(context, z, j, sqlite3_free);
-      }
-    }
-  }
-}
-
-/*
-** The hex() function.  Interpret the argument as a blob.  Return
-** a hexadecimal rendering as text.
-*/
-static void hexFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  int i, n;
-  const unsigned char *pBlob;
-  char *zHex, *z;
-  assert( argc==1 );
-  pBlob = (const unsigned char*)sqlite3_value_blob(argv[0]);
-  n = sqlite3_value_bytes(argv[0]);
-  if( n*2+1>SQLITE_MAX_LENGTH ){
-    sqlite3_result_error_toobig(context);
-    return;
-  }
-  assert( pBlob==sqlite3_value_blob(argv[0]) );  /* No encoding change */
-  z = zHex = (char*)contextMalloc(context, n*2 + 1);
-  if( zHex ){
-    for(i=0; i<n; i++, pBlob++){
-      unsigned char c = *pBlob;
-      *(z++) = hexdigits[(c>>4)&0xf];
-      *(z++) = hexdigits[c&0xf];
-    }
-    *z = 0;
-    sqlite3_result_text(context, zHex, n*2, sqlite3_free);
-  }
-}
-
-/*
-** The zeroblob(N) function returns a zero-filled blob of size N bytes.
-*/
-static void zeroblobFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  i64 n;
-  assert( argc==1 );
-  n = sqlite3_value_int64(argv[0]);
-  if( n>SQLITE_MAX_LENGTH ){
-    sqlite3_result_error_toobig(context);
-  }else{
-    sqlite3_result_zeroblob(context, n);
-  }
-}
-
-/*
-** The replace() function.  Three arguments are all strings: call
-** them A, B, and C. The result is also a string which is derived
-** from A by replacing every occurance of B with C.  The match
-** must be exact.  Collating sequences are not used.
-*/
-static void replaceFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  const unsigned char *zStr;        /* The input string A */
-  const unsigned char *zPattern;    /* The pattern string B */
-  const unsigned char *zRep;        /* The replacement string C */
-  unsigned char *zOut;              /* The output */
-  int nStr;                /* Size of zStr */
-  int nPattern;            /* Size of zPattern */
-  int nRep;                /* Size of zRep */
-  i64 nOut;                /* Maximum size of zOut */
-  int loopLimit;           /* Last zStr[] that might match zPattern[] */
-  int i, j;                /* Loop counters */
-
-  assert( argc==3 );
-  zStr = sqlite3_value_text(argv[0]);
-  if( zStr==0 ) return;
-  nStr = sqlite3_value_bytes(argv[0]);
-  assert( zStr==sqlite3_value_text(argv[0]) );  /* No encoding change */
-  zPattern = sqlite3_value_text(argv[1]);
-  if( zPattern==0 || zPattern[0]==0 ) return;
-  nPattern = sqlite3_value_bytes(argv[1]);
-  assert( zPattern==sqlite3_value_text(argv[1]) );  /* No encoding change */
-  zRep = sqlite3_value_text(argv[2]);
-  if( zRep==0 ) return;
-  nRep = sqlite3_value_bytes(argv[2]);
-  assert( zRep==sqlite3_value_text(argv[2]) );
-  nOut = nStr + 1;
-  assert( nOut<SQLITE_MAX_LENGTH );
-  zOut = (unsigned char*)contextMalloc(context, (int)nOut);
-  if( zOut==0 ){
-    return;
-  }
-  loopLimit = nStr - nPattern;  
-  for(i=j=0; i<=loopLimit; i++){
-    if( zStr[i]!=zPattern[0] || memcmp(&zStr[i], zPattern, nPattern) ){
-      zOut[j++] = zStr[i];
-    }else{
-      u8 *zOld;
-      nOut += nRep - nPattern;
-      if( nOut>=SQLITE_MAX_LENGTH ){
-        sqlite3_result_error_toobig(context);
-        sqlite3_free(zOut);
-        return;
-      }
-      zOld = zOut;
-      zOut = (unsigned char*)sqlite3_realloc(zOut, (int)nOut);
-      if( zOut==0 ){
-        sqlite3_result_error_nomem(context);
-        sqlite3_free(zOld);
-        return;
-      }
-      memcpy(&zOut[j], zRep, nRep);
-      j += nRep;
-      i += nPattern-1;
-    }
-  }
-  assert( j+nStr-i+1==nOut );
-  memcpy(&zOut[j], &zStr[i], nStr-i);
-  j += nStr - i;
-  assert( j<=nOut );
-  zOut[j] = 0;
-  sqlite3_result_text(context, (char*)zOut, j, sqlite3_free);
-}
-
-/*
-** Implementation of the TRIM(), LTRIM(), and RTRIM() functions.
-** The userdata is 0x1 for left trim, 0x2 for right trim, 0x3 for both.
-*/
-static void trimFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  const unsigned char *zIn;         /* Input string */
-  const unsigned char *zCharSet;    /* Set of characters to trim */
-  int nIn;                          /* Number of bytes in input */
-  int flags;                        /* 1: trimleft  2: trimright  3: trim */
-  int i;                            /* Loop counter */
-  unsigned char *aLen;              /* Length of each character in zCharSet */
-  unsigned char **azChar;           /* Individual characters in zCharSet */
-  int nChar;                        /* Number of characters in zCharSet */
-
-  if( sqlite3_value_type(argv[0])==SQLITE_NULL ){
-    return;
-  }
-  zIn = sqlite3_value_text(argv[0]);
-  if( zIn==0 ) return;
-  nIn = sqlite3_value_bytes(argv[0]);
-  assert( zIn==sqlite3_value_text(argv[0]) );
-  if( argc==1 ){
-    static const unsigned char lenOne[] = { 1 };
-    static const unsigned char *azOne[] = { (u8*)" " };
-    nChar = 1;
-    aLen = (u8*)lenOne;
-    azChar = (unsigned char **)azOne;
-    zCharSet = 0;
-  }else if( (zCharSet = sqlite3_value_text(argv[1]))==0 ){
-    return;
-  }else{
-    const unsigned char *z;
-    for(z=zCharSet, nChar=0; *z; nChar++){
-      SQLITE_SKIP_UTF8(z);
-    }
-    if( nChar>0 ){
-      azChar = (unsigned char**)contextMalloc(context, nChar*(sizeof(char*)+1));
-      if( azChar==0 ){
-        return;
-      }
-      aLen = (unsigned char*)&azChar[nChar];
-      for(z=zCharSet, nChar=0; *z; nChar++){
-        azChar[nChar] = (unsigned char *)z;
-        SQLITE_SKIP_UTF8(z);
-        aLen[nChar] = z - azChar[nChar];
-      }
-    }
-  }
-  if( nChar>0 ){
-    flags = (int)sqlite3_user_data(context);
-    if( flags & 1 ){
-      while( nIn>0 ){
-        int len;
-        for(i=0; i<nChar; i++){
-          len = aLen[i];
-          if( memcmp(zIn, azChar[i], len)==0 ) break;
-        }
-        if( i>=nChar ) break;
-        zIn += len;
-        nIn -= len;
-      }
-    }
-    if( flags & 2 ){
-      while( nIn>0 ){
-        int len;
-        for(i=0; i<nChar; i++){
-          len = aLen[i];
-          if( len<=nIn && memcmp(&zIn[nIn-len],azChar[i],len)==0 ) break;
-        }
-        if( i>=nChar ) break;
-        nIn -= len;
-      }
-    }
-    if( zCharSet ){
-      sqlite3_free(azChar);
-    }
-  }
-  sqlite3_result_text(context, (char*)zIn, nIn, SQLITE_TRANSIENT);
-}
-
-#ifdef SQLITE_SOUNDEX
-/*
-** Compute the soundex encoding of a word.
-*/
-static void soundexFunc(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  char zResult[8];
-  const u8 *zIn;
-  int i, j;
-  static const unsigned char iCode[] = {
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 1, 2, 3, 0, 1, 2, 0, 0, 2, 2, 4, 5, 5, 0,
-    1, 2, 6, 2, 3, 0, 1, 0, 2, 0, 2, 0, 0, 0, 0, 0,
-    0, 0, 1, 2, 3, 0, 1, 2, 0, 0, 2, 2, 4, 5, 5, 0,
-    1, 2, 6, 2, 3, 0, 1, 0, 2, 0, 2, 0, 0, 0, 0, 0,
-  };
-  assert( argc==1 );
-  zIn = (u8*)sqlite3_value_text(argv[0]);
-  if( zIn==0 ) zIn = (u8*)"";
-  for(i=0; zIn[i] && !isalpha(zIn[i]); i++){}
-  if( zIn[i] ){
-    u8 prevcode = iCode[zIn[i]&0x7f];
-    zResult[0] = toupper(zIn[i]);
-    for(j=1; j<4 && zIn[i]; i++){
-      int code = iCode[zIn[i]&0x7f];
-      if( code>0 ){
-        if( code!=prevcode ){
-          prevcode = code;
-          zResult[j++] = code + '0';
-        }
-      }else{
-        prevcode = 0;
-      }
-    }
-    while( j<4 ){
-      zResult[j++] = '0';
-    }
-    zResult[j] = 0;
-    sqlite3_result_text(context, zResult, 4, SQLITE_TRANSIENT);
-  }else{
-    sqlite3_result_text(context, "?000", 4, SQLITE_STATIC);
-  }
-}
-#endif
-
-#ifndef SQLITE_OMIT_LOAD_EXTENSION
-/*
-** A function that loads a shared-library extension then returns NULL.
-*/
-static void loadExt(sqlite3_context *context, int argc, sqlite3_value **argv){
-  const char *zFile = (const char *)sqlite3_value_text(argv[0]);
-  const char *zProc;
-  sqlite3 *db = (sqlite3*)sqlite3_user_data(context);
-  char *zErrMsg = 0;
-
-  if( argc==2 ){
-    zProc = (const char *)sqlite3_value_text(argv[1]);
-  }else{
-    zProc = 0;
-  }
-  if( zFile && sqlite3_load_extension(db, zFile, zProc, &zErrMsg) ){
-    sqlite3_result_error(context, zErrMsg, -1);
-    sqlite3_free(zErrMsg);
-  }
-}
-#endif
-
-#ifdef SQLITE_TEST
-/*
-** This function generates a string of random characters.  Used for
-** generating test data.
-*/
-static void randStr(sqlite3_context *context, int argc, sqlite3_value **argv){
-  static const unsigned char zSrc[] = 
-     "abcdefghijklmnopqrstuvwxyz"
-     "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-     "0123456789"
-     ".-!,:*^+=_|?/<> ";
-  int iMin, iMax, n, r, i;
-  unsigned char zBuf[1000];
-
-  /* It used to be possible to call randstr() with any number of arguments,
-  ** but now it is registered with SQLite as requiring exactly 2.
-  */
-  assert(argc==2);
-
-  iMin = sqlite3_value_int(argv[0]);
-  if( iMin<0 ) iMin = 0;
-  if( iMin>=sizeof(zBuf) ) iMin = sizeof(zBuf)-1;
-  iMax = sqlite3_value_int(argv[1]);
-  if( iMax<iMin ) iMax = iMin;
-  if( iMax>=sizeof(zBuf) ) iMax = sizeof(zBuf)-1;
-  n = iMin;
-  if( iMax>iMin ){
-    sqlite3Randomness(sizeof(r), &r);
-    r &= 0x7fffffff;
-    n += r%(iMax + 1 - iMin);
-  }
-  assert( n<sizeof(zBuf) );
-  sqlite3Randomness(n, zBuf);
-  for(i=0; i<n; i++){
-    zBuf[i] = zSrc[zBuf[i]%(sizeof(zSrc)-1)];
-  }
-  zBuf[n] = 0;
-  sqlite3_result_text(context, (char*)zBuf, n, SQLITE_TRANSIENT);
-}
-#endif /* SQLITE_TEST */
-
-#ifdef SQLITE_TEST
-/*
-** The following two SQL functions are used to test returning a text
-** result with a destructor. Function 'test_destructor' takes one argument
-** and returns the same argument interpreted as TEXT. A destructor is
-** passed with the sqlite3_result_text() call.
-**
-** SQL function 'test_destructor_count' returns the number of outstanding 
-** allocations made by 'test_destructor';
-**
-** WARNING: Not threadsafe.
-*/
-static int test_destructor_count_var = 0;
-static void destructor(void *p){
-  char *zVal = (char *)p;
-  assert(zVal);
-  zVal--;
-  sqlite3_free(zVal);
-  test_destructor_count_var--;
-}
-static void test_destructor(
-  sqlite3_context *pCtx, 
-  int nArg,
-  sqlite3_value **argv
-){
-  char *zVal;
-  int len;
-  sqlite3 *db = sqlite3_user_data(pCtx);
- 
-  test_destructor_count_var++;
-  assert( nArg==1 );
-  if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
-  len = sqlite3ValueBytes(argv[0], ENC(db)); 
-  zVal = contextMalloc(pCtx, len+3);
-  if( !zVal ){
-    return;
-  }
-  zVal[len+1] = 0;
-  zVal[len+2] = 0;
-  zVal++;
-  memcpy(zVal, sqlite3ValueText(argv[0], ENC(db)), len);
-  if( ENC(db)==SQLITE_UTF8 ){
-    sqlite3_result_text(pCtx, zVal, -1, destructor);
-#ifndef SQLITE_OMIT_UTF16
-  }else if( ENC(db)==SQLITE_UTF16LE ){
-    sqlite3_result_text16le(pCtx, zVal, -1, destructor);
-  }else{
-    sqlite3_result_text16be(pCtx, zVal, -1, destructor);
-#endif /* SQLITE_OMIT_UTF16 */
-  }
-}
-static void test_destructor_count(
-  sqlite3_context *pCtx, 
-  int nArg,
-  sqlite3_value **argv
-){
-  sqlite3_result_int(pCtx, test_destructor_count_var);
-}
-#endif /* SQLITE_TEST */
-
-#ifdef SQLITE_TEST
-/*
-** Routines for testing the sqlite3_get_auxdata() and sqlite3_set_auxdata()
-** interface.
-**
-** The test_auxdata() SQL function attempts to register each of its arguments
-** as auxiliary data.  If there are no prior registrations of aux data for
-** that argument (meaning the argument is not a constant or this is its first
-** call) then the result for that argument is 0.  If there is a prior
-** registration, the result for that argument is 1.  The overall result
-** is the individual argument results separated by spaces.
-*/
-static void free_test_auxdata(void *p) {sqlite3_free(p);}
-static void test_auxdata(
-  sqlite3_context *pCtx, 
-  int nArg,
-  sqlite3_value **argv
-){
-  int i;
-  char *zRet = contextMalloc(pCtx, nArg*2);
-  if( !zRet ) return;
-  memset(zRet, 0, nArg*2);
-  for(i=0; i<nArg; i++){
-    char const *z = (char*)sqlite3_value_text(argv[i]);
-    if( z ){
-      char *zAux = sqlite3_get_auxdata(pCtx, i);
-      if( zAux ){
-        zRet[i*2] = '1';
-        if( strcmp(zAux, z) ){
-          sqlite3_result_error(pCtx, "Auxilary data corruption", -1);
-          return;
-        }
-      }else {
-        zRet[i*2] = '0';
-      }
-
-      zAux = contextMalloc(pCtx, strlen(z)+1);
-      if( zAux ){
-        strcpy(zAux, z);
-        sqlite3_set_auxdata(pCtx, i, zAux, free_test_auxdata);
-      }
-      zRet[i*2+1] = ' ';
-    }
-  }
-  sqlite3_result_text(pCtx, zRet, 2*nArg-1, free_test_auxdata);
-}
-#endif /* SQLITE_TEST */
-
-#ifdef SQLITE_TEST
-/*
-** A function to test error reporting from user functions. This function
-** returns a copy of its first argument as an error.
-*/
-static void test_error(
-  sqlite3_context *pCtx, 
-  int nArg,
-  sqlite3_value **argv
-){
-  sqlite3_result_error(pCtx, (char*)sqlite3_value_text(argv[0]), 0);
-}
-#endif /* SQLITE_TEST */
-
-/*
-** An instance of the following structure holds the context of a
-** sum() or avg() aggregate computation.
-*/
-typedef struct SumCtx SumCtx;
-struct SumCtx {
-  double rSum;      /* Floating point sum */
-  i64 iSum;         /* Integer sum */   
-  i64 cnt;          /* Number of elements summed */
-  u8 overflow;      /* True if integer overflow seen */
-  u8 approx;        /* True if non-integer value was input to the sum */
-};
-
-/*
-** Routines used to compute the sum, average, and total.
-**
-** The SUM() function follows the (broken) SQL standard which means
-** that it returns NULL if it sums over no inputs.  TOTAL returns
-** 0.0 in that case.  In addition, TOTAL always returns a float where
-** SUM might return an integer if it never encounters a floating point
-** value.  TOTAL never fails, but SUM might through an exception if
-** it overflows an integer.
-*/
-static void sumStep(sqlite3_context *context, int argc, sqlite3_value **argv){
-  SumCtx *p;
-  int type;
-  assert( argc==1 );
-  p = (SumCtx*)sqlite3_aggregate_context(context, sizeof(*p));
-  type = sqlite3_value_numeric_type(argv[0]);
-  if( p && type!=SQLITE_NULL ){
-    p->cnt++;
-    if( type==SQLITE_INTEGER ){
-      i64 v = sqlite3_value_int64(argv[0]);
-      p->rSum += v;
-      if( (p->approx|p->overflow)==0 ){
-        i64 iNewSum = p->iSum + v;
-        int s1 = p->iSum >> (sizeof(i64)*8-1);
-        int s2 = v       >> (sizeof(i64)*8-1);
-        int s3 = iNewSum >> (sizeof(i64)*8-1);
-        p->overflow = (s1&s2&~s3) | (~s1&~s2&s3);
-        p->iSum = iNewSum;
-      }
-    }else{
-      p->rSum += sqlite3_value_double(argv[0]);
-      p->approx = 1;
-    }
-  }
-}
-static void sumFinalize(sqlite3_context *context){
-  SumCtx *p;
-  p = (SumCtx*)sqlite3_aggregate_context(context, 0);
-  if( p && p->cnt>0 ){
-    if( p->overflow ){
-      sqlite3_result_error(context,"integer overflow",-1);
-    }else if( p->approx ){
-      sqlite3_result_double(context, p->rSum);
-    }else{
-      sqlite3_result_int64(context, p->iSum);
-    }
-  }
-}
-static void avgFinalize(sqlite3_context *context){
-  SumCtx *p;
-  p = (SumCtx*)sqlite3_aggregate_context(context, 0);
-  if( p && p->cnt>0 ){
-    sqlite3_result_double(context, p->rSum/(double)p->cnt);
-  }
-}
-static void totalFinalize(sqlite3_context *context){
-  SumCtx *p;
-  p = (SumCtx*)sqlite3_aggregate_context(context, 0);
-  sqlite3_result_double(context, p ? p->rSum : 0.0);
-}
-
-/*
-** The following structure keeps track of state information for the
-** count() aggregate function.
-*/
-typedef struct CountCtx CountCtx;
-struct CountCtx {
-  i64 n;
-};
-
-/*
-** Routines to implement the count() aggregate function.
-*/
-static void countStep(sqlite3_context *context, int argc, sqlite3_value **argv){
-  CountCtx *p;
-  p = (CountCtx*)sqlite3_aggregate_context(context, sizeof(*p));
-  if( (argc==0 || SQLITE_NULL!=sqlite3_value_type(argv[0])) && p ){
-    p->n++;
-  }
-}   
-static void countFinalize(sqlite3_context *context){
-  CountCtx *p;
-  p = (CountCtx*)sqlite3_aggregate_context(context, 0);
-  sqlite3_result_int64(context, p ? p->n : 0);
-}
-
-/*
-** Routines to implement min() and max() aggregate functions.
-*/
-static void minmaxStep(sqlite3_context *context, int argc, sqlite3_value **argv){
-  Mem *pArg  = (Mem *)argv[0];
-  Mem *pBest;
-
-  if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
-  pBest = (Mem *)sqlite3_aggregate_context(context, sizeof(*pBest));
-  if( !pBest ) return;
-
-  if( pBest->flags ){
-    int max;
-    int cmp;
-    CollSeq *pColl = sqlite3GetFuncCollSeq(context);
-    /* This step function is used for both the min() and max() aggregates,
-    ** the only difference between the two being that the sense of the
-    ** comparison is inverted. For the max() aggregate, the
-    ** sqlite3_user_data() function returns (void *)-1. For min() it
-    ** returns (void *)db, where db is the sqlite3* database pointer.
-    ** Therefore the next statement sets variable 'max' to 1 for the max()
-    ** aggregate, or 0 for min().
-    */
-    max = sqlite3_user_data(context)!=0;
-    cmp = sqlite3MemCompare(pBest, pArg, pColl);
-    if( (max && cmp<0) || (!max && cmp>0) ){
-      sqlite3VdbeMemCopy(pBest, pArg);
-    }
-  }else{
-    sqlite3VdbeMemCopy(pBest, pArg);
-  }
-}
-static void minMaxFinalize(sqlite3_context *context){
-  sqlite3_value *pRes;
-  pRes = (sqlite3_value *)sqlite3_aggregate_context(context, 0);
-  if( pRes ){
-    if( pRes->flags ){
-      sqlite3_result_value(context, pRes);
-    }
-    sqlite3VdbeMemRelease(pRes);
-  }
-}
-
-/*
-** group_concat(EXPR, ?SEPARATOR?)
-*/
-static void groupConcatStep(
-  sqlite3_context *context,
-  int argc,
-  sqlite3_value **argv
-){
-  const char *zVal;
-  StrAccum *pAccum;
-  const char *zSep;
-  int nVal, nSep;
-  if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
-  pAccum = (StrAccum*)sqlite3_aggregate_context(context, sizeof(*pAccum));
-
-  if( pAccum ){
-    pAccum->useMalloc = 1;
-    if( pAccum->nChar ){
-      if( argc==2 ){
-        zSep = (char*)sqlite3_value_text(argv[1]);
-        nSep = sqlite3_value_bytes(argv[1]);
-      }else{
-        zSep = ",";
-        nSep = 1;
-      }
-      sqlite3StrAccumAppend(pAccum, zSep, nSep);
-    }
-    zVal = (char*)sqlite3_value_text(argv[0]);
-    nVal = sqlite3_value_bytes(argv[0]);
-    sqlite3StrAccumAppend(pAccum, zVal, nVal);
-  }
-}
-static void groupConcatFinalize(sqlite3_context *context){
-  StrAccum *pAccum;
-  pAccum = (StrAccum*)sqlite3_aggregate_context(context, 0);
-  if( pAccum ){
-    if( pAccum->tooBig ){
-      sqlite3_result_error_toobig(context);
-    }else if( pAccum->mallocFailed ){
-      sqlite3_result_error_nomem(context);
-    }else{    
-      sqlite3_result_text(context, sqlite3StrAccumFinish(pAccum), -1, 
-                          sqlite3_free);
-    }
-  }
-}
-
-/*
-** This function registered all of the above C functions as SQL
-** functions.  This should be the only routine in this file with
-** external linkage.
-*/
-void sqlite3RegisterBuiltinFunctions(sqlite3 *db){
-  static const struct {
-     char *zName;
-     signed char nArg;
-     u8 argType;           /* ff: db   1: 0, 2: 1, 3: 2,...  N:  N-1. */
-     u8 eTextRep;          /* 1: UTF-16.  0: UTF-8 */
-     u8 needCollSeq;
-     void (*xFunc)(sqlite3_context*,int,sqlite3_value **);
-  } aFuncs[] = {
-    { "min",               -1, 0, SQLITE_UTF8,    1, minmaxFunc },
-    { "min",                0, 0, SQLITE_UTF8,    1, 0          },
-    { "max",               -1, 1, SQLITE_UTF8,    1, minmaxFunc },
-    { "max",                0, 1, SQLITE_UTF8,    1, 0          },
-    { "typeof",             1, 0, SQLITE_UTF8,    0, typeofFunc },
-    { "length",             1, 0, SQLITE_UTF8,    0, lengthFunc },
-    { "substr",             2, 0, SQLITE_UTF8,    0, substrFunc },
-    { "substr",             3, 0, SQLITE_UTF8,    0, substrFunc },
-    { "abs",                1, 0, SQLITE_UTF8,    0, absFunc    },
-    { "round",              1, 0, SQLITE_UTF8,    0, roundFunc  },
-    { "round",              2, 0, SQLITE_UTF8,    0, roundFunc  },
-    { "upper",              1, 0, SQLITE_UTF8,    0, upperFunc  },
-    { "lower",              1, 0, SQLITE_UTF8,    0, lowerFunc  },
-    { "coalesce",          -1, 0, SQLITE_UTF8,    0, ifnullFunc },
-    { "coalesce",           0, 0, SQLITE_UTF8,    0, 0          },
-    { "coalesce",           1, 0, SQLITE_UTF8,    0, 0          },
-    { "hex",                1, 0, SQLITE_UTF8,    0, hexFunc    },
-    { "ifnull",             2, 0, SQLITE_UTF8,    1, ifnullFunc },
-    { "random",            -1, 0, SQLITE_UTF8,    0, randomFunc },
-    { "randomblob",         1, 0, SQLITE_UTF8,    0, randomBlob },
-    { "nullif",             2, 0, SQLITE_UTF8,    1, nullifFunc },
-    { "sqlite_version",     0, 0, SQLITE_UTF8,    0, versionFunc},
-    { "quote",              1, 0, SQLITE_UTF8,    0, quoteFunc  },
-    { "last_insert_rowid",  0, 0xff, SQLITE_UTF8, 0, last_insert_rowid },
-    { "changes",            0, 0xff, SQLITE_UTF8, 0, changes           },
-    { "total_changes",      0, 0xff, SQLITE_UTF8, 0, total_changes     },
-    { "replace",            3, 0, SQLITE_UTF8,    0, replaceFunc       },
-    { "ltrim",              1, 1, SQLITE_UTF8,    0, trimFunc          },
-    { "ltrim",              2, 1, SQLITE_UTF8,    0, trimFunc          },
-    { "rtrim",              1, 2, SQLITE_UTF8,    0, trimFunc          },
-    { "rtrim",              2, 2, SQLITE_UTF8,    0, trimFunc          },
-    { "trim",               1, 3, SQLITE_UTF8,    0, trimFunc          },
-    { "trim",               2, 3, SQLITE_UTF8,    0, trimFunc          },
-    { "zeroblob",           1, 0, SQLITE_UTF8,    0, zeroblobFunc      },
-#ifdef SQLITE_SOUNDEX
-    { "soundex",            1, 0, SQLITE_UTF8,    0, soundexFunc},
-#endif
-#ifndef SQLITE_OMIT_LOAD_EXTENSION
-    { "load_extension",     1, 0xff, SQLITE_UTF8, 0, loadExt },
-    { "load_extension",     2, 0xff, SQLITE_UTF8, 0, loadExt },
-#endif
-#ifdef SQLITE_TEST
-    { "randstr",               2, 0,    SQLITE_UTF8, 0, randStr    },
-    { "test_destructor",       1, 0xff, SQLITE_UTF8, 0, test_destructor},
-    { "test_destructor_count", 0, 0,    SQLITE_UTF8, 0, test_destructor_count},
-    { "test_auxdata",         -1, 0,    SQLITE_UTF8, 0, test_auxdata},
-    { "test_error",            1, 0,    SQLITE_UTF8, 0, test_error},
-#endif
-  };
-  static const struct {
-    char *zName;
-    signed char nArg;
-    u8 argType;
-    u8 needCollSeq;
-    void (*xStep)(sqlite3_context*,int,sqlite3_value**);
-    void (*xFinalize)(sqlite3_context*);
-  } aAggs[] = {
-    { "min",    1, 0, 1, minmaxStep,   minMaxFinalize },
-    { "max",    1, 1, 1, minmaxStep,   minMaxFinalize },
-    { "sum",    1, 0, 0, sumStep,      sumFinalize    },
-    { "total",  1, 0, 0, sumStep,      totalFinalize    },
-    { "avg",    1, 0, 0, sumStep,      avgFinalize    },
-    { "count",  0, 0, 0, countStep,    countFinalize  },
-    { "count",  1, 0, 0, countStep,    countFinalize  },
-    { "group_concat", 1, 0, 0, groupConcatStep, groupConcatFinalize },
-    { "group_concat", 2, 0, 0, groupConcatStep, groupConcatFinalize },
-  };
-  int i;
-
-  for(i=0; i<sizeof(aFuncs)/sizeof(aFuncs[0]); i++){
-    void *pArg;
-    u8 argType = aFuncs[i].argType;
-    if( argType==0xff ){
-      pArg = db;
-    }else{
-      pArg = (void*)(int)argType;
-    }
-    sqlite3CreateFunc(db, aFuncs[i].zName, aFuncs[i].nArg,
-        aFuncs[i].eTextRep, pArg, aFuncs[i].xFunc, 0, 0);
-    if( aFuncs[i].needCollSeq ){
-      FuncDef *pFunc = sqlite3FindFunction(db, aFuncs[i].zName, 
-          strlen(aFuncs[i].zName), aFuncs[i].nArg, aFuncs[i].eTextRep, 0);
-      if( pFunc && aFuncs[i].needCollSeq ){
-        pFunc->needCollSeq = 1;
-      }
-    }
-  }
-#ifndef SQLITE_OMIT_ALTERTABLE
-  sqlite3AlterFunctions(db);
-#endif
-#ifndef SQLITE_OMIT_PARSER
-  sqlite3AttachFunctions(db);
-#endif
-  for(i=0; i<sizeof(aAggs)/sizeof(aAggs[0]); i++){
-    void *pArg = (void*)(int)aAggs[i].argType;
-    sqlite3CreateFunc(db, aAggs[i].zName, aAggs[i].nArg, SQLITE_UTF8, 
-        pArg, 0, aAggs[i].xStep, aAggs[i].xFinalize);
-    if( aAggs[i].needCollSeq ){
-      FuncDef *pFunc = sqlite3FindFunction( db, aAggs[i].zName,
-          strlen(aAggs[i].zName), aAggs[i].nArg, SQLITE_UTF8, 0);
-      if( pFunc && aAggs[i].needCollSeq ){
-        pFunc->needCollSeq = 1;
-      }
-    }
-  }
-  sqlite3RegisterDateTimeFunctions(db);
-  if( !db->mallocFailed ){
-    int rc = sqlite3_overload_function(db, "MATCH", 2);
-    assert( rc==SQLITE_NOMEM || rc==SQLITE_OK );
-    if( rc==SQLITE_NOMEM ){
-      db->mallocFailed = 1;
-    }
-  }
-#ifdef SQLITE_SSE
-  (void)sqlite3SseFunctions(db);
-#endif
-#ifdef SQLITE_CASE_SENSITIVE_LIKE
-  sqlite3RegisterLikeFunctions(db, 1);
-#else
-  sqlite3RegisterLikeFunctions(db, 0);
-#endif
-}
-
-/*
-** Set the LIKEOPT flag on the 2-argument function with the given name.
-*/
-static void setLikeOptFlag(sqlite3 *db, const char *zName, int flagVal){
-  FuncDef *pDef;
-  pDef = sqlite3FindFunction(db, zName, strlen(zName), 2, SQLITE_UTF8, 0);
-  if( pDef ){
-    pDef->flags = flagVal;
-  }
-}
-
-/*
-** Register the built-in LIKE and GLOB functions.  The caseSensitive
-** parameter determines whether or not the LIKE operator is case
-** sensitive.  GLOB is always case sensitive.
-*/
-void sqlite3RegisterLikeFunctions(sqlite3 *db, int caseSensitive){
-  struct compareInfo *pInfo;
-  if( caseSensitive ){
-    pInfo = (struct compareInfo*)&likeInfoAlt;
-  }else{
-    pInfo = (struct compareInfo*)&likeInfoNorm;
-  }
-  sqlite3CreateFunc(db, "like", 2, SQLITE_UTF8, pInfo, likeFunc, 0, 0);
-  sqlite3CreateFunc(db, "like", 3, SQLITE_UTF8, pInfo, likeFunc, 0, 0);
-  sqlite3CreateFunc(db, "glob", 2, SQLITE_UTF8, 
-      (struct compareInfo*)&globInfo, likeFunc, 0,0);
-  setLikeOptFlag(db, "glob", SQLITE_FUNC_LIKE | SQLITE_FUNC_CASE);
-  setLikeOptFlag(db, "like", 
-      caseSensitive ? (SQLITE_FUNC_LIKE | SQLITE_FUNC_CASE) : SQLITE_FUNC_LIKE);
-}
-
-/*
-** pExpr points to an expression which implements a function.  If
-** it is appropriate to apply the LIKE optimization to that function
-** then set aWc[0] through aWc[2] to the wildcard characters and
-** return TRUE.  If the function is not a LIKE-style function then
-** return FALSE.
-*/
-int sqlite3IsLikeFunction(sqlite3 *db, Expr *pExpr, int *pIsNocase, char *aWc){
-  FuncDef *pDef;
-  if( pExpr->op!=TK_FUNCTION || !pExpr->pList ){
-    return 0;
-  }
-  if( pExpr->pList->nExpr!=2 ){
-    return 0;
-  }
-  pDef = sqlite3FindFunction(db, (char*)pExpr->token.z, pExpr->token.n, 2,
-                             SQLITE_UTF8, 0);
-  if( pDef==0 || (pDef->flags & SQLITE_FUNC_LIKE)==0 ){
-    return 0;
-  }
-
-  /* The memcpy() statement assumes that the wildcard characters are
-  ** the first three statements in the compareInfo structure.  The
-  ** asserts() that follow verify that assumption
-  */
-  memcpy(aWc, pDef->pUserData, 3);
-  assert( (char*)&likeInfoAlt == (char*)&likeInfoAlt.matchAll );
-  assert( &((char*)&likeInfoAlt)[1] == (char*)&likeInfoAlt.matchOne );
-  assert( &((char*)&likeInfoAlt)[2] == (char*)&likeInfoAlt.matchSet );
-  *pIsNocase = (pDef->flags & SQLITE_FUNC_CASE)==0;
-  return 1;
-}