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Comment:Make sure the chunksize in test_multiplex does not cause the pending byte to fall near the end of a chunk. Adjust the chunksize upward as necessary to prevent this.
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SHA1:e05f8a2998f4f4cbdb65702baa65893c538b3d38
User & Date: drh 2011-12-15 13:29:12
Context
2011-12-15
17:00
When deleting a file with the multiplexor VFS, also delete any overflow files that exist. check-in: 3af1feaa user: dan tags: nx-devkit
13:29
Make sure the chunksize in test_multiplex does not cause the pending byte to fall near the end of a chunk. Adjust the chunksize upward as necessary to prevent this. check-in: e05f8a29 user: drh tags: nx-devkit
11:45
Fix some problems with dropped error codes in multiplexOpen(). check-in: 2d50f781 user: dan tags: nx-devkit
Changes
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Changes to src/test_multiplex.c.

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            pGroup->bEnabled = 0;
          }
        }
      }
      pGroup->zName = p;
      memcpy(pGroup->zName, zName, nName+1);
      pGroup->nName = nName;










    }
    pGroup->flags = flags;
    rc = multiplexSubFilename(pGroup, 1);
    if( rc==SQLITE_OK ){
      pSubOpen = multiplexSubOpen(pGroup, 0, &rc, pOutFlags);
      assert( pSubOpen || rc!=SQLITE_OK );
    }







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            pGroup->bEnabled = 0;
          }
        }
      }
      pGroup->zName = p;
      memcpy(pGroup->zName, zName, nName+1);
      pGroup->nName = nName;
    }
    if( pGroup->bEnabled ){
      /* Make sure that the chunksize is not such that the pending byte
      ** falls at the end of a chunk.  A region of up to 64K following
      ** the pending byte is never written, so if the pending byte occurs
      ** near the end of a chunk, that chunk will be too small. */
      extern int sqlite3PendingByte;
      while( (sqlite3PendingByte % pGroup->szChunk)>=(pGroup->szChunk-65536) ){
        pGroup->szChunk += 65536;
      }
    }
    pGroup->flags = flags;
    rc = multiplexSubFilename(pGroup, 1);
    if( rc==SQLITE_OK ){
      pSubOpen = multiplexSubOpen(pGroup, 0, &rc, pOutFlags);
      assert( pSubOpen || rc!=SQLITE_OK );
    }