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greg |
1.1 |
#ifndef lint |
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greg |
2.13 |
static const char RCSid[] = "$Id: words.c,v 2.12 2019/12/28 18:05:14 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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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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greg |
2.11 |
char *cp = rs; |
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greg |
1.2 |
|
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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 */ |
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greg |
2.3 |
{ |
68 |
greg |
2.2 |
while (isspace(*s)) |
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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 |
{ |
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greg |
1.2 |
while (isspace(*s)) |
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s++; |
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greg |
2.13 |
s += (*s == '-') | (*s == '+'); |
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greg |
1.2 |
if (!isdigit(*s)) |
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return(NULL); |
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do |
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s++; |
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while (isdigit(*s)); |
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return(s); |
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greg |
1.1 |
} |
93 |
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char * |
96 |
greg |
2.10 |
fskip(char *s) /* skip float in string */ |
97 |
greg |
1.1 |
{ |
98 |
greg |
2.11 |
char *cp; |
99 |
greg |
1.1 |
|
100 |
greg |
1.4 |
while (isspace(*s)) |
101 |
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s++; |
102 |
greg |
2.13 |
s += (*s == '-') | (*s == '+'); |
103 |
greg |
1.4 |
cp = s; |
104 |
greg |
1.1 |
while (isdigit(*cp)) |
105 |
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cp++; |
106 |
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if (*cp == '.') { |
107 |
greg |
1.2 |
cp++; s++; |
108 |
greg |
1.1 |
while (isdigit(*cp)) |
109 |
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cp++; |
110 |
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} |
111 |
greg |
1.2 |
if (cp == s) |
112 |
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return(NULL); |
113 |
greg |
2.11 |
if ((*cp == 'e') | (*cp == 'E')) |
114 |
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return(isspace(*++cp) ? NULL : iskip(cp)); |
115 |
greg |
1.1 |
return(cp); |
116 |
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} |
117 |
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118 |
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119 |
greg |
2.5 |
int |
120 |
greg |
2.10 |
isint(char *s) /* check integer format */ |
121 |
greg |
1.1 |
{ |
122 |
greg |
2.11 |
char *cp; |
123 |
greg |
1.1 |
|
124 |
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cp = iskip(s); |
125 |
greg |
1.2 |
return(cp != NULL && *cp == '\0'); |
126 |
greg |
1.1 |
} |
127 |
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128 |
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129 |
greg |
2.5 |
int |
130 |
greg |
2.10 |
isintd(char *s, char *ds) /* check integer format with delimiter set */ |
131 |
greg |
1.1 |
{ |
132 |
greg |
2.11 |
char *cp; |
133 |
greg |
1.1 |
|
134 |
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cp = iskip(s); |
135 |
greg |
1.3 |
return(cp != NULL && strchr(ds, *cp) != NULL); |
136 |
greg |
1.1 |
} |
137 |
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138 |
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139 |
greg |
2.5 |
int |
140 |
greg |
2.10 |
isflt(char *s) /* check float format */ |
141 |
greg |
1.1 |
{ |
142 |
greg |
2.11 |
char *cp; |
143 |
greg |
1.1 |
|
144 |
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cp = fskip(s); |
145 |
greg |
1.2 |
return(cp != NULL && *cp == '\0'); |
146 |
greg |
1.1 |
} |
147 |
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148 |
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149 |
greg |
2.5 |
int |
150 |
greg |
2.10 |
isfltd(char *s, char *ds) /* check integer format with delimiter set */ |
151 |
greg |
1.1 |
{ |
152 |
greg |
2.11 |
char *cp; |
153 |
greg |
1.1 |
|
154 |
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cp = fskip(s); |
155 |
greg |
1.3 |
return(cp != NULL && strchr(ds, *cp) != NULL); |
156 |
greg |
1.1 |
} |
157 |
greg |
2.10 |
|
158 |
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159 |
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int |
160 |
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isname(char *s) /* check for legal identifier name */ |
161 |
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{ |
162 |
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while (*s == '_') /* skip leading underscores */ |
163 |
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s++; |
164 |
greg |
2.13 |
if (!isascii(*s) | !isalpha(*s)) /* start with a letter */ |
165 |
greg |
2.10 |
return(0); |
166 |
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while (isascii(*++s) && isgraph(*s)) /* all visible characters */ |
167 |
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; |
168 |
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return(*s == '\0'); /* ending in nul */ |
169 |
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} |