1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id"; |
3 |
#endif |
4 |
/* |
5 |
* Routines for recognizing and moving about words in strings. |
6 |
* |
7 |
* External symbols declared in standard.h |
8 |
*/ |
9 |
|
10 |
#include "copyright.h" |
11 |
|
12 |
#include <ctype.h> |
13 |
#include <string.h> |
14 |
|
15 |
|
16 |
char * |
17 |
atos(rs, nb, s) /* get word from string, returning rs */ |
18 |
char *rs; |
19 |
register int nb; |
20 |
register char *s; |
21 |
{ |
22 |
register char *cp = rs; |
23 |
|
24 |
while (isspace(*s)) |
25 |
s++; |
26 |
while (--nb > 0 && *s && !isspace(*s)) |
27 |
*cp++ = *s++; |
28 |
*cp = '\0'; |
29 |
return(rs); |
30 |
} |
31 |
|
32 |
|
33 |
char * |
34 |
nextword(cp, nb, s) /* get (quoted) word, returning new s */ |
35 |
register char *cp; |
36 |
register int nb; |
37 |
register char *s; |
38 |
{ |
39 |
int quote = 0; |
40 |
|
41 |
if (s == NULL) return(NULL); |
42 |
while (isspace(*s)) |
43 |
s++; |
44 |
switch (*s) { |
45 |
case '\0': |
46 |
return(NULL); |
47 |
case '"': |
48 |
case '\'': |
49 |
quote = *s++; |
50 |
} |
51 |
while (--nb > 0 && *s && (quote ? *s!=quote : !isspace(*s))) |
52 |
*cp++ = *s++; |
53 |
*cp = '\0'; |
54 |
if (quote && *s==quote) |
55 |
s++; |
56 |
return(s); |
57 |
} |
58 |
|
59 |
|
60 |
char * |
61 |
sskip(s) /* skip word in string, leaving on space */ |
62 |
register char *s; |
63 |
{ |
64 |
while (isspace(*s)) |
65 |
s++; |
66 |
while (*s && !isspace(*s)) |
67 |
s++; |
68 |
return(s); |
69 |
} |
70 |
|
71 |
|
72 |
char * |
73 |
sskip2(s, n) /* skip word(s) in string, leaving on word */ |
74 |
register char *s; |
75 |
register int n; |
76 |
{ |
77 |
while (isspace(*s)) |
78 |
s++; |
79 |
while (n-- > 0) { |
80 |
while (*s && !isspace(*s)) |
81 |
s++; |
82 |
while (isspace(*s)) |
83 |
s++; |
84 |
} |
85 |
return(s); |
86 |
} |
87 |
|
88 |
|
89 |
char * |
90 |
iskip(s) /* skip integer in string */ |
91 |
register char *s; |
92 |
{ |
93 |
while (isspace(*s)) |
94 |
s++; |
95 |
if (*s == '-' || *s == '+') |
96 |
s++; |
97 |
if (!isdigit(*s)) |
98 |
return(NULL); |
99 |
do |
100 |
s++; |
101 |
while (isdigit(*s)); |
102 |
return(s); |
103 |
} |
104 |
|
105 |
|
106 |
char * |
107 |
fskip(s) /* skip float in string */ |
108 |
register char *s; |
109 |
{ |
110 |
register char *cp; |
111 |
|
112 |
while (isspace(*s)) |
113 |
s++; |
114 |
if (*s == '-' || *s == '+') |
115 |
s++; |
116 |
cp = s; |
117 |
while (isdigit(*cp)) |
118 |
cp++; |
119 |
if (*cp == '.') { |
120 |
cp++; s++; |
121 |
while (isdigit(*cp)) |
122 |
cp++; |
123 |
} |
124 |
if (cp == s) |
125 |
return(NULL); |
126 |
if (*cp == 'e' || *cp == 'E') |
127 |
return(iskip(cp+1)); |
128 |
return(cp); |
129 |
} |
130 |
|
131 |
|
132 |
int |
133 |
isint(s) /* check integer format */ |
134 |
char *s; |
135 |
{ |
136 |
register char *cp; |
137 |
|
138 |
cp = iskip(s); |
139 |
return(cp != NULL && *cp == '\0'); |
140 |
} |
141 |
|
142 |
|
143 |
int |
144 |
isintd(s, ds) /* check integer format with delimiter set */ |
145 |
char *s, *ds; |
146 |
{ |
147 |
register char *cp; |
148 |
|
149 |
cp = iskip(s); |
150 |
return(cp != NULL && strchr(ds, *cp) != NULL); |
151 |
} |
152 |
|
153 |
|
154 |
int |
155 |
isflt(s) /* check float format */ |
156 |
char *s; |
157 |
{ |
158 |
register char *cp; |
159 |
|
160 |
cp = fskip(s); |
161 |
return(cp != NULL && *cp == '\0'); |
162 |
} |
163 |
|
164 |
|
165 |
int |
166 |
isfltd(s, ds) /* check integer format with delimiter set */ |
167 |
char *s, *ds; |
168 |
{ |
169 |
register char *cp; |
170 |
|
171 |
cp = fskip(s); |
172 |
return(cp != NULL && strchr(ds, *cp) != NULL); |
173 |
} |