src/common/words.c

/* Copyright (c) 1991 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 * Routines for recognizing and moving about words in strings.
 */

#include  <ctype.h>

#ifdef  BSD
#define  strchr         index
#endif

#define  NULL           0

extern char  *strchr();


char *
atos(rs, nb, s)                 /* get next word from string */
char  *rs;
register int  nb;
register char  *s;
{
        register char  *cp = rs;

        while (isspace(*s))
                s++;
        while (--nb > 0 && *s && !isspace(*s))
                *cp++ = *s++;
        *cp = '\0';
        return(rs);
}


char *
sskip(s)                        /* skip word in string */
register char  *s;
{
        while (isspace(*s))
                s++;
        while (*s && !isspace(*s))
                s++;
        return(s);
}


char *
iskip(s)                        /* skip integer in string */
register char  *s;
{
        while (isspace(*s))
                s++;
        if (*s == '-' || *s == '+')
                s++;
        if (!isdigit(*s))
                return(NULL);
        do
                s++;
        while (isdigit(*s));
        return(s);
}


char *
fskip(s)                        /* skip float in string */
register char  *s;
{
        register char  *cp = s;

        while (isspace(*cp))
                cp++;
        if (*cp == '-' || *cp == '+')
                cp++;
        s = cp;
        while (isdigit(*cp))
                cp++;
        if (*cp == '.') {
                cp++; s++;
                while (isdigit(*cp))
                        cp++;
        }
        if (cp == s)
                return(NULL);
        if (*cp == 'e' || *cp == 'E')
                return(iskip(cp+1));
        return(cp);
}


isint(s)                        /* check integer format */
char  *s;
{
        register char  *cp;

        cp = iskip(s);
        return(cp != NULL && *cp == '\0');
}


isintd(s, ds)                   /* check integer format with delimiter set */
char  *s, *ds;
{
        register char  *cp;

        cp = iskip(s);
        return(cp != NULL && strchr(*cp, ds) != NULL);
}


isflt(s)                        /* check float format */
char  *s;
{
        register char  *cp;

        cp = fskip(s);
        return(cp != NULL && *cp == '\0');
}


isfltd(s, ds)                   /* check integer format with delimiter set */
char  *s, *ds;
{
        register char  *cp;

        cp = fskip(s);
        return(cp != NULL && strchr(*cp, ds) != NULL);
}
Revision:	1.2
Committed:	Tue Jul 23 11:36:42 1991 UTC (32 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+37 -16 lines
Log Message:	added atos() function and made checking more robust
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1991 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* Routines for recognizing and moving about words in strings.
9			*/
10
11			#include <ctype.h>
12
13			#ifdef BSD
14			#define strchr index
15			#endif
16
17			#define NULL 0
18
19			extern char *strchr();
20
21
22			char *
23	greg	1.2	atos(rs, nb, s) /* get next word from string */
24			char *rs;
25			register int nb;
26			register char *s;
27			{
28			register char *cp = rs;
29
30			while (isspace(*s))
31			s++;
32			while (--nb > 0 && s && !isspace(s))
33			cp++ = s++;
34			*cp = '\0';
35			return(rs);
36			}
37
38
39			char *
40	greg	1.1	sskip(s) /* skip word in string */
41			register char *s;
42			{
43			while (isspace(*s))
44			s++;
45			while (s && !isspace(s))
46			s++;
47			return(s);
48			}
49
50
51			char *
52			iskip(s) /* skip integer in string */
53	greg	1.2	register char *s;
54	greg	1.1	{
55	greg	1.2	while (isspace(*s))
56			s++;
57			if (s == '-' \|\| s == '+')
58			s++;
59			if (!isdigit(*s))
60			return(NULL);
61			do
62			s++;
63			while (isdigit(*s));
64			return(s);
65	greg	1.1	}
66
67
68			char *
69			fskip(s) /* skip float in string */
70	greg	1.2	register char *s;
71	greg	1.1	{
72			register char *cp = s;
73
74			while (isspace(*cp))
75			cp++;
76			if (cp == '-' \|\| cp == '+')
77			cp++;
78	greg	1.2	s = cp;
79	greg	1.1	while (isdigit(*cp))
80			cp++;
81			if (*cp == '.') {
82	greg	1.2	cp++; s++;
83	greg	1.1	while (isdigit(*cp))
84			cp++;
85			}
86	greg	1.2	if (cp == s)
87			return(NULL);
88	greg	1.1	if (cp == 'e' \|\| cp == 'E')
89			return(iskip(cp+1));
90			return(cp);
91			}
92
93
94			isint(s) /* check integer format */
95			char *s;
96			{
97			register char *cp;
98
99			cp = iskip(s);
100	greg	1.2	return(cp != NULL && *cp == '\0');
101	greg	1.1	}
102
103
104			isintd(s, ds) /* check integer format with delimiter set */
105			char s, ds;
106			{
107			register char *cp;
108
109			cp = iskip(s);
110	greg	1.2	return(cp != NULL && strchr(*cp, ds) != NULL);
111	greg	1.1	}
112
113
114			isflt(s) /* check float format */
115			char *s;
116			{
117			register char *cp;
118
119			cp = fskip(s);
120	greg	1.2	return(cp != NULL && *cp == '\0');
121	greg	1.1	}
122
123
124			isfltd(s, ds) /* check integer format with delimiter set */
125			char s, ds;
126			{
127			register char *cp;
128
129			cp = fskip(s);
130	greg	1.2	return(cp != NULL && strchr(*cp, ds) != NULL);
131	greg	1.1	}