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greg |
1.1 |
#ifndef lint |
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greg |
2.10 |
static const char RCSid[] = "$Id: words.c,v 2.9 2004/09/28 17:54:18 greg Exp $"; |
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greg |
1.1 |
#endif |
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/* |
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* Routines for recognizing and moving about words in strings. |
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greg |
2.5 |
* |
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* External symbols declared in standard.h |
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*/ |
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greg |
2.6 |
#include "copyright.h" |
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greg |
1.1 |
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#include <ctype.h> |
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greg |
2.5 |
#include <string.h> |
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greg |
1.1 |
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schorsch |
2.8 |
#include "rtio.h" |
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greg |
1.1 |
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char * |
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greg |
2.10 |
atos(char *rs, int nb, char *s) /* get word from string, returning rs */ |
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greg |
1.2 |
{ |
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register char *cp = rs; |
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while (isspace(*s)) |
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s++; |
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while (--nb > 0 && *s && !isspace(*s)) |
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*cp++ = *s++; |
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*cp = '\0'; |
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return(rs); |
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gwlarson |
2.4 |
} |
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char * |
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greg |
2.10 |
nextword(char *cp, int nb, char *s) /* get (quoted) word, returning new s */ |
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gwlarson |
2.4 |
{ |
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int quote = 0; |
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if (s == NULL) return(NULL); |
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while (isspace(*s)) |
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s++; |
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switch (*s) { |
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case '\0': |
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return(NULL); |
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case '"': |
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case '\'': |
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quote = *s++; |
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} |
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while (--nb > 0 && *s && (quote ? *s!=quote : !isspace(*s))) |
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*cp++ = *s++; |
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*cp = '\0'; |
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if (quote && *s==quote) |
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s++; |
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return(s); |
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greg |
1.2 |
} |
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char * |
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greg |
2.10 |
sskip(char *s) /* skip word in string, leaving on space */ |
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greg |
1.1 |
{ |
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while (isspace(*s)) |
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s++; |
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while (*s && !isspace(*s)) |
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greg |
2.2 |
s++; |
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greg |
2.3 |
return(s); |
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} |
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char * |
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greg |
2.10 |
sskip2(char *s, int n) /* skip word(s) in string, leaving on word */ |
68 |
greg |
2.3 |
{ |
69 |
greg |
2.2 |
while (isspace(*s)) |
70 |
greg |
1.1 |
s++; |
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greg |
2.3 |
while (n-- > 0) { |
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while (*s && !isspace(*s)) |
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s++; |
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while (isspace(*s)) |
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s++; |
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} |
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greg |
1.1 |
return(s); |
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} |
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char * |
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greg |
2.10 |
iskip(char *s) /* skip integer in string */ |
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greg |
1.1 |
{ |
84 |
greg |
1.2 |
while (isspace(*s)) |
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s++; |
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if (*s == '-' || *s == '+') |
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s++; |
88 |
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if (!isdigit(*s)) |
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return(NULL); |
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do |
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s++; |
92 |
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while (isdigit(*s)); |
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return(s); |
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greg |
1.1 |
} |
95 |
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char * |
98 |
greg |
2.10 |
fskip(char *s) /* skip float in string */ |
99 |
greg |
1.1 |
{ |
100 |
greg |
1.4 |
register char *cp; |
101 |
greg |
1.1 |
|
102 |
greg |
1.4 |
while (isspace(*s)) |
103 |
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s++; |
104 |
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if (*s == '-' || *s == '+') |
105 |
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s++; |
106 |
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cp = s; |
107 |
greg |
1.1 |
while (isdigit(*cp)) |
108 |
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cp++; |
109 |
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if (*cp == '.') { |
110 |
greg |
1.2 |
cp++; s++; |
111 |
greg |
1.1 |
while (isdigit(*cp)) |
112 |
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cp++; |
113 |
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} |
114 |
greg |
1.2 |
if (cp == s) |
115 |
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return(NULL); |
116 |
greg |
1.1 |
if (*cp == 'e' || *cp == 'E') |
117 |
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return(iskip(cp+1)); |
118 |
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return(cp); |
119 |
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} |
120 |
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121 |
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122 |
greg |
2.5 |
int |
123 |
greg |
2.10 |
isint(char *s) /* check integer format */ |
124 |
greg |
1.1 |
{ |
125 |
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register char *cp; |
126 |
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127 |
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cp = iskip(s); |
128 |
greg |
1.2 |
return(cp != NULL && *cp == '\0'); |
129 |
greg |
1.1 |
} |
130 |
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131 |
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132 |
greg |
2.5 |
int |
133 |
greg |
2.10 |
isintd(char *s, char *ds) /* check integer format with delimiter set */ |
134 |
greg |
1.1 |
{ |
135 |
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register char *cp; |
136 |
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137 |
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cp = iskip(s); |
138 |
greg |
1.3 |
return(cp != NULL && strchr(ds, *cp) != NULL); |
139 |
greg |
1.1 |
} |
140 |
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141 |
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142 |
greg |
2.5 |
int |
143 |
greg |
2.10 |
isflt(char *s) /* check float format */ |
144 |
greg |
1.1 |
{ |
145 |
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register char *cp; |
146 |
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147 |
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cp = fskip(s); |
148 |
greg |
1.2 |
return(cp != NULL && *cp == '\0'); |
149 |
greg |
1.1 |
} |
150 |
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151 |
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152 |
greg |
2.5 |
int |
153 |
greg |
2.10 |
isfltd(char *s, char *ds) /* check integer format with delimiter set */ |
154 |
greg |
1.1 |
{ |
155 |
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register char *cp; |
156 |
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157 |
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cp = fskip(s); |
158 |
greg |
1.3 |
return(cp != NULL && strchr(ds, *cp) != NULL); |
159 |
greg |
1.1 |
} |
160 |
greg |
2.10 |
|
161 |
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162 |
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int |
163 |
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isname(char *s) /* check for legal identifier name */ |
164 |
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{ |
165 |
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while (*s == '_') /* skip leading underscores */ |
166 |
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s++; |
167 |
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if (!isascii(*s) || !isalpha(*s)) /* start with a letter */ |
168 |
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return(0); |
169 |
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while (isascii(*++s) && isgraph(*s)) /* all visible characters */ |
170 |
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; |
171 |
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return(*s == '\0'); /* ending in nul */ |
172 |
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} |