int file_column_count ( char *filename );
int file_row_count ( char *input_filename );
int i4block_components ( int l, int m, int n, int a[], int c[] );
int i4_min ( int i1, int i2 );
int i4mat_components ( int m, int n, int a[], int c[] );
int *i4mat_data_read ( char *input_filename, int m, int n );
void i4mat_header_read ( char *input_filename, int *m, int *n );
int i4vec_components ( int n, int a[], int c[] );
int s_len_trim ( char *s );
int s_to_i4 ( char *s, int *last, int *error );
int s_to_i4vec ( char *s, int n, int ivec[] );
int s_word_count ( char *s );
void timestamp ( void );