src/common/fgetword.c

#ifndef lint
static const char       RCSid[] = "$Id: fgetword.c,v 2.5 2003/07/27 22:12:01 schorsch Exp $";
#endif
/*
 * Read white space separated words from stream
 *
 *  External symbols declared in rtio.h
 */

#include "copyright.h"

#include  "rtio.h"

#include  <ctype.h>


char *
fgetword(                       /* get (quoted) word up to n-1 characters */
        char  *s,
        int  n,
        register FILE  *fp
)
{
        int  quote = '\0';
        register char  *cp;
        register int  c;
                                        /* sanity checks */
        if ((s == NULL) | (n <= 0))
                return(NULL);
                                        /* skip initial white space */
        do
                c = getc(fp);
        while (isspace(c));
                                        /* check for quote */
        if ((c == '"') | (c == '\'')) {
                quote = c;
                c = getc(fp);
        }
                                        /* check for end of file */
        if (c == EOF)
                return(NULL);
                                        /* get actual word */
        cp = s;
        do {
                if (--n <= 0)           /* check length limit */
                        break;
                *cp++ = c;
                c = getc(fp);
        } while (c != EOF && !(quote ? c==quote : isspace(c)));
        *cp = '\0';
        if ((c != EOF) & (!quote))      /* replace space */
                ungetc(c, fp);
        return(s);
}
Revision:	2.6
Committed:	Wed Oct 12 03:37:54 2005 UTC (18 years, 6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad4R2P2, rad5R0, rad4R2, rad4R1, rad4R0, rad3R8, rad3R9, rad4R2P1
Changes since 2.5:	+9 -5 lines
Log Message:	Added sanity checks and fixed parameters
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.6	static const char RCSid[] = "$Id: fgetword.c,v 2.5 2003/07/27 22:12:01 schorsch Exp $";
3	greg	1.1	#endif
4			/*
5			* Read white space separated words from stream
6	greg	2.2	*
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			#include <ctype.h>
15
16
17			char *
18	greg	2.6	fgetword( /* get (quoted) word up to n-1 characters */
19			char *s,
20			int n,
21			register FILE *fp
22			)
23	greg	1.1	{
24	greg	2.2	int quote = '\0';
25	greg	1.1	register char *cp;
26			register int c;
27	greg	2.6	/* sanity checks */
28			if ((s == NULL) \| (n <= 0))
29			return(NULL);
30	greg	1.1	/* skip initial white space */
31			do
32			c = getc(fp);
33			while (isspace(c));
34	greg	2.2	/* check for quote */
35	schorsch	2.5	if ((c == '"') \| (c == '\'')) {
36	greg	2.2	quote = c;
37			c = getc(fp);
38			}
39	greg	1.1	/* check for end of file */
40			if (c == EOF)
41			return(NULL);
42			/* get actual word */
43			cp = s;
44			do {
45	greg	2.2	if (--n <= 0) /* check length limit */
46	greg	1.1	break;
47			*cp++ = c;
48			c = getc(fp);
49	greg	2.2	} while (c != EOF && !(quote ? c==quote : isspace(c)));
50	greg	1.1	*cp = '\0';
51	schorsch	2.5	if ((c != EOF) & (!quote)) /* replace space */
52	greg	1.1	ungetc(c, fp);
53			return(s);
54			}