fdexec.c

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#include <stdio.h>
#include "fdparm.h"
#include "viewcmds.h"

const long filesize;

int exec_cmd(int cmd)
{
	long new_pos,get_pos();

	switch(cmd){
			 case    PREVPAGE:
				    move_backward(PAGE_SIZE-LINES_OVERLAP);
			display_page();
			break;
		case    NEXTPAGE:
			move_forward(PAGE_SIZE-LINES_OVERLAP);
				    display_page();
			break;
		case    EXITPGM:
			break;
		case    MOVETOPOS:
			new_pos=get_pos();
			move_to(new_pos);
			set_top_page();
			move_backward(0);
			display_page();
			break;
		case    FIRSTPAGE:
			move_to(0l);
			set_top_page();
			display_page();
			break;
		case    LASTPAGE:
			move_to(filesize);
			set_top_page();
				    move_backward(PAGE_SIZE);
			display_page();
			break;
		case    PREVLINE:
			move_backward(1);
			display_page();
			break;
		case    NEXTLINE:
			move_forward(1);
			display_page();
			break;
	}
}