src/common/fgetline.c

#ifndef lint
static const char       RCSid[] = "$Id: fgetline.c,v 2.3 2003/02/25 02:47:21 greg Exp $";
#endif
/*
 * fgetline.c - read line with escaped newlines.
 *
 *  External symbols declared in rtio.h
 */

#include "copyright.h"

#include  "rtio.h"


char *
fgetline(s, n, fp)      /* read in line with escapes, elide final newline */
char  *s;
int  n;
register FILE  *fp;
{
        register char  *cp = s;
        register int  c = EOF;

        while (--n > 0 && (c = getc(fp)) != EOF) {
                if (c == '\r')
                        continue;
                if (c == '\n' && (cp == s || cp[-1] != '\\'))
                        break;
                *cp++ = c;
        }
        if (cp == s && c == EOF)
                return(NULL);
        *cp = '\0';
        return(s);
}
Revision:	2.4
Committed:	Fri Jun 27 06:53:21 2003 UTC (21 years, 10 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.3:	+3 -3 lines
Log Message:	Broke standard.h into rtio.h, rterror.h, rtmath.h, and rtmisc.h
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.4	static const char RCSid[] = "$Id: fgetline.c,v 2.3 2003/02/25 02:47:21 greg Exp $";
3	greg	1.1	#endif
4			/*
5	greg	1.2	* fgetline.c - read line with escaped newlines.
6	greg	1.1	*
7	greg	2.4	* External symbols declared in rtio.h
8	greg	2.2	*/
9
10	greg	2.3	#include "copyright.h"
11	greg	1.1
12	greg	2.4	#include "rtio.h"
13	greg	1.1
14
15			char *
16			fgetline(s, n, fp) /* read in line with escapes, elide final newline */
17			char *s;
18	greg	1.2	int n;
19			register FILE *fp;
20	greg	1.1	{
21	greg	1.2	register char *cp = s;
22			register int c = EOF;
23	greg	1.1
24	greg	1.2	while (--n > 0 && (c = getc(fp)) != EOF) {
25	greg	2.2	if (c == '\r')
26			continue;
27	greg	1.2	if (c == '\n' && (cp == s \|\| cp[-1] != '\\'))
28			break;
29	greg	1.1	*cp++ = c;
30			}
31	greg	1.2	if (cp == s && c == EOF)
32	greg	1.1	return(NULL);
33	greg	1.2	*cp = '\0';
34	greg	1.1	return(s);
35			}