Fossil

  Blob *pSrc,     /* The edited file that is to be copied to pOut */
  int *aC,        /* Array of integer triples describing the edit */
  int i,          /* Index in aC[] of current location in pSrc */
  int sz          /* Number of lines in unedited source to output */
){
  while( sz>0 ){
    if( aC[i]==0 && aC[i+1]==0 && aC[i+2]==0 ) break;
    if( aC[i]>=sz ){
      blob_copy_lines(pOut, pSrc, sz);
      aC[i] -= sz;
      break;
    }
    blob_copy_lines(pOut, pSrc, aC[i]);
    blob_copy_lines(pOut, pSrc, aC[i+2]);
    sz -= aC[i] + aC[i+1];

      DEBUG( printf("COPY %d\n", nCpy); )
      blob_copy_lines(pOut, pPivot, nCpy);
      blob_copy_lines(0, pV1, nCpy);
      blob_copy_lines(0, pV2, nCpy);
      aC1[i1] -= nCpy;
      aC2[i2] -= nCpy;
    }else
    if( aC1[i1] >= aC2[i2+1] && aC1[i1]>0 && aC2[i2+1]+aC2[i2+2]>0 ){
      nDel = aC2[i2+1];
      nIns = aC2[i2+2];
      DEBUG( printf("EDIT -%d+%d left\n", nDel, nIns); )
      blob_copy_lines(0, pPivot, nDel);
      blob_copy_lines(0, pV1, nDel);
      blob_copy_lines(pOut, pV2, nIns);
      aC1[i1] -= nDel;
      i2 += 3;
    }else
    if( aC2[i2] >= aC1[i1+1] && aC2[i2]>0 && aC1[i1+1]+aC1[i1+2]>0 ){
      nDel = aC1[i1+1];
      nIns = aC1[i1+2];
      DEBUG( printf("EDIT -%d+%d right\n", nDel, nIns); )
      blob_copy_lines(0, pPivot, nDel);
      blob_copy_lines(0, pV2, nDel);
      blob_copy_lines(pOut, pV1, nIns);
      aC2[i2] -= nDel;