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Overview
Comment:Avoid trying to allocate a negative number of bytes of memory in the test wrapper for sqlite3_blob_read().
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SHA1: 739b5d9aa4eaa4191ca512d0dbf94a6bdbb12d97
User & Date: dan 2010-10-27 19:08:26.000
Context
2010-10-28
11:31
Enforce the MAX_EXPR_DEPTH limit while building expression trees during SQL parsing. (check-in: 2625eee0cb user: dan tags: trunk)
2010-10-27
19:23
Add tail recursion to the sqlite3ExprDelete() routine in order to keep down stack space usage for really, really large expressions. Later: The tail recursion is dangerous since the recursion might happen after the expression has been freed. (check-in: 7324c7f2f8 user: drh tags: mistake)
19:08
Avoid trying to allocate a negative number of bytes of memory in the test wrapper for sqlite3_blob_read(). (check-in: 739b5d9aa4 user: dan tags: trunk)
18:10
Merge experimental fts3/fts4 changes with trunk. (check-in: 988164cf48 user: dan tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/test1.c.
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  Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
  int objc,              /* Number of arguments */
  Tcl_Obj *CONST objv[]  /* Command arguments */
){
  sqlite3_blob *pBlob;
  int nByte;
  int iOffset;
  unsigned char *zBuf;
  int rc;
  
  if( objc!=4 ){
    Tcl_WrongNumArgs(interp, 1, objv, "CHANNEL OFFSET N");
    return TCL_ERROR;
  }

  if( blobHandleFromObj(interp, objv[1], &pBlob) ) return TCL_ERROR;
  if( TCL_OK!=Tcl_GetIntFromObj(interp, objv[2], &iOffset)
   || TCL_OK!=Tcl_GetIntFromObj(interp, objv[3], &nByte)
  ){ 
    return TCL_ERROR;
  }


  zBuf = (unsigned char *)Tcl_Alloc(nByte);

  rc = sqlite3_blob_read(pBlob, zBuf, nByte, iOffset);
  if( rc==SQLITE_OK ){
    Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(zBuf, nByte));
  }else{
    Tcl_SetResult(interp, (char *)sqlite3TestErrorName(rc), TCL_VOLATILE);
  }
  Tcl_Free((char *)zBuf);








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  Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
  int objc,              /* Number of arguments */
  Tcl_Obj *CONST objv[]  /* Command arguments */
){
  sqlite3_blob *pBlob;
  int nByte;
  int iOffset;
  unsigned char *zBuf = 0;
  int rc;
  
  if( objc!=4 ){
    Tcl_WrongNumArgs(interp, 1, objv, "CHANNEL OFFSET N");
    return TCL_ERROR;
  }

  if( blobHandleFromObj(interp, objv[1], &pBlob) ) return TCL_ERROR;
  if( TCL_OK!=Tcl_GetIntFromObj(interp, objv[2], &iOffset)
   || TCL_OK!=Tcl_GetIntFromObj(interp, objv[3], &nByte)
  ){ 
    return TCL_ERROR;
  }

  if( nByte>0 ){
    zBuf = (unsigned char *)Tcl_Alloc(nByte);
  }
  rc = sqlite3_blob_read(pBlob, zBuf, nByte, iOffset);
  if( rc==SQLITE_OK ){
    Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(zBuf, nByte));
  }else{
    Tcl_SetResult(interp, (char *)sqlite3TestErrorName(rc), TCL_VOLATILE);
  }
  Tcl_Free((char *)zBuf);
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