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 word from string, returning rs */
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 *
nextword(cp, nb, s)             /* get (quoted) word, returning new s */
register char  *cp;
register int  nb;
register char  *s;
{
        int     quote = 0;

        if (s == NULL) return(NULL);
        while (isspace(*s))
                s++;
        switch (*s) {
        case '\0':
                return(NULL);
        case '"':
        case '\'':
                quote = *s++;
        }
        while (--nb > 0 && *s && (quote ? *s!=quote : !isspace(*s)))
                *cp++ = *s++;
        *cp = '\0';
        if (quote && *s==quote)
                s++;
        return(s);
}


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:	2.4
Committed:	Fri Jan 29 11:18:23 1999 UTC (25 years, 3 months ago) by gwlarson
Content type:	text/plain
Branch:	MAIN
Changes since 2.3:	+28 -1 lines
Log Message:	added nextword() function for reading quoted strings
#	Content
1	/* Copyright (c) 1996 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	atos(rs, nb, s) /* get word from string, returning rs */
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	nextword(cp, nb, s) /* get (quoted) word, returning new s */
41	register char *cp;
42	register int nb;
43	register char *s;
44	{
45	int quote = 0;
46
47	if (s == NULL) return(NULL);
48	while (isspace(*s))
49	s++;
50	switch (*s) {
51	case '\0':
52	return(NULL);
53	case '"':
54	case '\'':
55	quote = *s++;
56	}
57	while (--nb > 0 && s && (quote ? s!=quote : !isspace(*s)))
58	cp++ = s++;
59	*cp = '\0';
60	if (quote && *s==quote)
61	s++;
62	return(s);
63	}
64
65
66	char *
67	sskip(s) /* skip word in string, leaving on space */
68	register char *s;
69	{
70	while (isspace(*s))
71	s++;
72	while (s && !isspace(s))
73	s++;
74	return(s);
75	}
76
77
78	char *
79	sskip2(s, n) /* skip word(s) in string, leaving on word */
80	register char *s;
81	register int n;
82	{
83	while (isspace(*s))
84	s++;
85	while (n-- > 0) {
86	while (s && !isspace(s))
87	s++;
88	while (isspace(*s))
89	s++;
90	}
91	return(s);
92	}
93
94
95	char *
96	iskip(s) /* skip integer in string */
97	register char *s;
98	{
99	while (isspace(*s))
100	s++;
101	if (s == '-' \|\| s == '+')
102	s++;
103	if (!isdigit(*s))
104	return(NULL);
105	do
106	s++;
107	while (isdigit(*s));
108	return(s);
109	}
110
111
112	char *
113	fskip(s) /* skip float in string */
114	register char *s;
115	{
116	register char *cp;
117
118	while (isspace(*s))
119	s++;
120	if (s == '-' \|\| s == '+')
121	s++;
122	cp = s;
123	while (isdigit(*cp))
124	cp++;
125	if (*cp == '.') {
126	cp++; s++;
127	while (isdigit(*cp))
128	cp++;
129	}
130	if (cp == s)
131	return(NULL);
132	if (cp == 'e' \|\| cp == 'E')
133	return(iskip(cp+1));
134	return(cp);
135	}
136
137
138	isint(s) /* check integer format */
139	char *s;
140	{
141	register char *cp;
142
143	cp = iskip(s);
144	return(cp != NULL && *cp == '\0');
145	}
146
147
148	isintd(s, ds) /* check integer format with delimiter set */
149	char s, ds;
150	{
151	register char *cp;
152
153	cp = iskip(s);
154	return(cp != NULL && strchr(ds, *cp) != NULL);
155	}
156
157
158	isflt(s) /* check float format */
159	char *s;
160	{
161	register char *cp;
162
163	cp = fskip(s);
164	return(cp != NULL && *cp == '\0');
165	}
166
167
168	isfltd(s, ds) /* check integer format with delimiter set */
169	char s, ds;
170	{
171	register char *cp;
172
173	cp = fskip(s);
174	return(cp != NULL && strchr(ds, *cp) != NULL);
175	}