main.c

/* main.c, Zepto Emacs, Public Domain, Hugh Barney, 2017, Derived from: Anthony's Editor January 93 */

#include "header.h"

int done;
char_t *input;
int msgflag;
char msgline[TEMPBUF];
char temp[TEMPBUF];
keymap_t *key_return;
keymap_t *key_map;
buffer_t *curbp;

int main(int argc, char **argv)
{
	raw();
	if (argc != 2) fatal("usage: zepto filename\n");
	initscr();	
	
	curbp = new_buffer();
	(void)insert_file(argv[1], FALSE);
	/* Save filename irregardless of load() success. */
	strncpy(curbp->b_fname, argv[1], NAME_MAX);
	curbp->b_fname[NAME_MAX] = '\0'; /* force truncation */

	if (!growgap(curbp, CHUNK)) fatal("Failed to allocate required memory.\n");

	key_map = keymap;

	while (!done) {
		display();
		input = get_key(key_map, &key_return);

		if (key_return != NULL) {
			(key_return->func)();
		} else {
			/* allow TAB and NEWLINE, any other control char is 'Not Bound' */
			if (*input > 31 || *input == 13 || *input == 9)
				insert();
                        else {
				fflush(stdin);
				msg("Not bound");
			}
		}
	}

	move(MSGLINE, 0);
	clrtoeol();
	refresh();
	noraw();
	return 0;
}

void fatal(char *msg)
{
	noraw();
	printf("\nzepto: %s\n", msg);
	exit(1);
}

void msg(char *msg, ...)
{
	va_list args;
	va_start(args, msg);
	(void)vsprintf(msgline, msg, args);
	va_end(args);
	msgflag = TRUE;
}

buffer_t* new_buffer()
{
	buffer_t *bp = (buffer_t *)malloc(sizeof(buffer_t));
	assert(bp != NULL);

	bp->b_point = 0;
	bp->b_page = 0;
	bp->b_epage = 0;
	bp->b_flags = 0;
	bp->b_buf = NULL;
	bp->b_ebuf = NULL;
	bp->b_gap = NULL;
	bp->b_egap = NULL;
	bp->b_fname[0] = '\0';
	bp->w_top = 0;	
	bp->w_rows = LINES - 2;
	return bp;
}