src/common/words.c

/* Copyright (c) 1996 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, leaving on space */
register char  *s;
{
        while (isspace(*s))
                s++;
        while (*s && !isspace(*s))
                s++;
        return(s);
}


char *
sskip2(s, n)                    /* skip word(s) in string, leaving on word */
register char  *s;
register int    n;
{
        while (isspace(*s))
                s++;
        while (n-- > 0) {
                while (*s && !isspace(*s))
                        s++;
                while (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;

        while (isspace(*s))
                s++;
        if (*s == '-' || *s == '+')
                s++;
        cp = s;
        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(ds, *cp) != 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(ds, *cp) != NULL);
}
Revision:	2.3
Committed:	Wed Jan 17 10:53:38 1996 UTC (28 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.2:	+16 -1 lines
Log Message:	replaced sskip() behavior and added new sskip2() function
#	User	Rev	Content
1	greg	2.2	/* Copyright (c) 1996 Regents of the University of California */
2	greg	1.1
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	2.3	sskip(s) /* skip word in string, leaving on space */
41	greg	1.1	register char *s;
42			{
43			while (isspace(*s))
44			s++;
45			while (s && !isspace(s))
46	greg	2.2	s++;
47	greg	2.3	return(s);
48			}
49
50
51			char *
52			sskip2(s, n) /* skip word(s) in string, leaving on word */
53			register char *s;
54			register int n;
55			{
56	greg	2.2	while (isspace(*s))
57	greg	1.1	s++;
58	greg	2.3	while (n-- > 0) {
59			while (s && !isspace(s))
60			s++;
61			while (isspace(*s))
62			s++;
63			}
64	greg	1.1	return(s);
65			}
66
67
68			char *
69			iskip(s) /* skip integer in string */
70	greg	1.2	register char *s;
71	greg	1.1	{
72	greg	1.2	while (isspace(*s))
73			s++;
74			if (s == '-' \|\| s == '+')
75			s++;
76			if (!isdigit(*s))
77			return(NULL);
78			do
79			s++;
80			while (isdigit(*s));
81			return(s);
82	greg	1.1	}
83
84
85			char *
86			fskip(s) /* skip float in string */
87	greg	1.2	register char *s;
88	greg	1.1	{
89	greg	1.4	register char *cp;
90	greg	1.1
91	greg	1.4	while (isspace(*s))
92			s++;
93			if (s == '-' \|\| s == '+')
94			s++;
95			cp = s;
96	greg	1.1	while (isdigit(*cp))
97			cp++;
98			if (*cp == '.') {
99	greg	1.2	cp++; s++;
100	greg	1.1	while (isdigit(*cp))
101			cp++;
102			}
103	greg	1.2	if (cp == s)
104			return(NULL);
105	greg	1.1	if (cp == 'e' \|\| cp == 'E')
106			return(iskip(cp+1));
107			return(cp);
108			}
109
110
111			isint(s) /* check integer format */
112			char *s;
113			{
114			register char *cp;
115
116			cp = iskip(s);
117	greg	1.2	return(cp != NULL && *cp == '\0');
118	greg	1.1	}
119
120
121			isintd(s, ds) /* check integer format with delimiter set */
122			char s, ds;
123			{
124			register char *cp;
125
126			cp = iskip(s);
127	greg	1.3	return(cp != NULL && strchr(ds, *cp) != NULL);
128	greg	1.1	}
129
130
131			isflt(s) /* check float format */
132			char *s;
133			{
134			register char *cp;
135
136			cp = fskip(s);
137	greg	1.2	return(cp != NULL && *cp == '\0');
138	greg	1.1	}
139
140
141			isfltd(s, ds) /* check integer format with delimiter set */
142			char s, ds;
143			{
144			register char *cp;
145
146			cp = fskip(s);
147	greg	1.3	return(cp != NULL && strchr(ds, *cp) != NULL);
148	greg	1.1	}