ack/util/cpp/input.c
1994-06-24 11:31:16 +00:00

64 lines
1.2 KiB
C

/* $Id$ */
/*
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
* See the copyright notice in the ACK home directory, in the file "Copyright".
*/
#include "file_info.h"
#include "input.h"
#define INP_TYPE struct file_info
#define INP_VAR finfo
struct file_info finfo;
#include <inp_pkg.body>
char *
getwdir(fn)
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 "";
else
if (p) {
*p = '\0';
fn = Salloc(fn, p - &fn[0] + 1);
*p = '/';
return fn;
}
else return "";
}
int NoUnstack;
int Unstacked;
int InputLevel;
AtEoIT()
{
/* if (NoUnstack) warning("unexpected EOF"); ??? */
/* This is wrong; in an #elif, NoUnstack can be set, but you
can still get calls to AtEoIT().
*/
InputLevel--;
DoUnstack();
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;
}