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Comment:Avoid an assertion fault that can occur with invalid UTF8 on the LENGTH() function. Ticket #548. (CVS 1154)
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SHA1:7080fc39eaf98ef7a7d1c1819603f67841f35c72
User & Date: drh 2004-01-02 13:17:49
Context
2004-01-02
15:08
The "EST" timezone designation is ambiguous. Do not use it in the test scripts. (CVS 1155) check-in: 720b565e user: drh tags: trunk
13:17
Avoid an assertion fault that can occur with invalid UTF8 on the LENGTH() function. Ticket #548. (CVS 1154) check-in: 7080fc39 user: drh tags: trunk
2004-01-01
12:33
Remove unused code from the integrity_check logic. Ticket #545. (CVS 1153) check-in: ee51e205 user: drh tags: trunk
Changes
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Changes to src/func.c.

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** 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.c,v 1.34 2003/12/23 02:17:35 drh Exp $
*/
#include <ctype.h>
#include <math.h>
#include <stdlib.h>
#include <assert.h>
#include "sqliteInt.h"
#include "os.h"
................................................................................
  }else if( p1>0 ){
    p1--;
  }
  if( p1+p2>len ){
    p2 = len-p1;
  }
#ifdef SQLITE_UTF8
  for(i=0; i<p1; i++){
    assert( z[i] );
    if( (z[i]&0xc0)==0x80 ) p1++;
  }
  while( z[i] && (z[i]&0xc0)==0x80 ){ i++; p1++; }
  for(; i<p1+p2; i++){
    assert( z[i] );
    if( (z[i]&0xc0)==0x80 ) p2++;
  }
  while( z[i] && (z[i]&0xc0)==0x80 ){ i++; p2++; }
#endif
  if( p2<0 ) p2 = 0;
  sqlite_set_result_string(context, &z[p1], p2);
}







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** 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.c,v 1.35 2004/01/02 13:17:49 drh Exp $
*/
#include <ctype.h>
#include <math.h>
#include <stdlib.h>
#include <assert.h>
#include "sqliteInt.h"
#include "os.h"
................................................................................
  }else if( p1>0 ){
    p1--;
  }
  if( p1+p2>len ){
    p2 = len-p1;
  }
#ifdef SQLITE_UTF8
  for(i=0; i<p1 && z[i]; i++){

    if( (z[i]&0xc0)==0x80 ) p1++;
  }
  while( z[i] && (z[i]&0xc0)==0x80 ){ i++; p1++; }
  for(; i<p1+p2 && z[i]; i++){

    if( (z[i]&0xc0)==0x80 ) p2++;
  }
  while( z[i] && (z[i]&0xc0)==0x80 ){ i++; p2++; }
#endif
  if( p2<0 ) p2 = 0;
  sqlite_set_result_string(context, &z[p1], p2);
}