/*
 * This helper utility for the FreeCalypso Magnetite build system
 * emits potentially long generated Makefile lines, breaking them into
 * multiple lines with backslashes.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>

int is_cmd, equ_or_colon, extra_indent;
int linelen;

main(argc, argv)
	char **argv;
{
	char **ap;

	if (argc < 4) {
		fprintf(stderr, "error: too few arguments\n", argv[0]);
		exit(1);
	}
	if (!strcmp(argv[1], "def")) {
		is_cmd = 0;
		equ_or_colon = '=';
		extra_indent = 0;
	} else if (!strcmp(argv[1], "dep")) {
		is_cmd = 0;
		equ_or_colon = ':';
		extra_indent = 1;
	} else if (!strcmp(argv[1], "cmd")) {
		is_cmd = 1;
		extra_indent = 1;
	} else {
		fprintf(stderr, "error: line type \"%s\" not known\n", argv[1]);
		exit(1);
	}
	if (is_cmd) {
		putchar('\t');
		linelen = 8;
	} else
		linelen = 0;
	fputs(argv[2], stdout);
	linelen += strlen(argv[2]);
	if (is_cmd) {
		putchar(' ');
		linelen++;
	} else {
		putchar(equ_or_colon);
		linelen++;
		putchar('\t');
		do
			linelen++;
		while (linelen & 7);
	}
	fputs(argv[3], stdout);
	linelen += strlen(argv[3]);
	for (ap = argv + 4; *ap; ap++) {
		if (linelen + 1 + strlen(*ap) <= 78) {
			putchar(' ');
			linelen++;
		} else {
			fputs(" \\\n\t", stdout);
			linelen = 8;
			if (extra_indent) {
				fputs("    ", stdout);
				linelen += 4;
			}
		}
		fputs(*ap, stdout);
		linelen += strlen(*ap);
	}
	putchar('\n');
	exit(0);
}