#ifndef _LU_FILE_H
#define _LU_FILE_H
void lu_file_empty(
lu_int nlines, lu_int *begin, lu_int *end, lu_int *next, lu_int *prev,
lu_int fmem);
void lu_file_reappend(
lu_int line, lu_int nlines, lu_int *begin, lu_int *end, lu_int *next,
lu_int *prev, lu_int *index, double *value, lu_int extra_space);
lu_int lu_file_compress(
lu_int nlines, lu_int *begin, lu_int *end, const lu_int *next,
lu_int *index, double *value, double stretch, lu_int pad);
lu_int lu_file_diff(
lu_int nrow, const lu_int *begin_row, const lu_int *end_row,
const lu_int *begin_col, const lu_int *end_col, const lu_int *index,
const double *value);
#endif