ack/lang/cem/cpp.ansi/input.c

/*
 * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
 * See the copyright notice in the ACK home directory, in the file "Copyright".
 */
/* $Header$ */

#include "file_info.h"
#include "input.h"

#define INP_PUSHBACK	3
#define INP_TYPE	struct file_info
#define INP_VAR		finfo
struct file_info	finfo;
#include <inp_pkg.body>
#include <alloc.h>

char *
getwdir(fn)
	register char *fn;
{
	register char *p;
	char *strrindex();

	p = strrindex(fn, '/');
	while (p && *(p + 1) == '\0') {	/* remove trailing /'s */
		*p = '\0';
		p = strrindex(fn, '/');
	}

	if (fn[0] == '\0' || (fn[0] == '/' && p == &fn[0])) /* absolute path */
		return "";
	if (p) {
		*p = '\0';
		fn = Salloc(fn, (unsigned)(p - &fn[0] + 1));
		*p = '/';
		return fn;
	}
	return ".";
}

int	NoUnstack;
int	InputLevel;

AtEoIT()
{
	InputLevel--;
	/* if (NoUnstack) warning("unexpected EOF"); ??? */
	unstackrepl();
	return 0;
}

AtEoIF()
{
	extern int nestlevel;
	extern int nestcount;
	extern int svnestlevel[];

	if (nestlevel > svnestlevel[nestcount]) warning("missing #endif");
	else if (NoUnstack) warning("unexpected EOF");
	nestlevel = svnestlevel[nestcount--];
	return 0;
}