1 #include <u.h>
2 #include <libc.h>
3 #include "libString.h"
4 
5 #undef isspace
6 #define isspace(c) ((c)==' ' || (c)=='\t' || (c)=='\n')
7 
8 /* Get the next field from a String.  The field is delimited by white space,
9  * single or double quotes.
10  */
11 String *
12 s_parse(String *from, String *to)
13 {
14 	if (*from->ptr == '\0')
15 		return 0;
16 	if (to == 0)
17 		to = s_new();
18 	if (*from->ptr == '\'') {
19 		from->ptr++;
20 		for (;*from->ptr != '\'' && *from->ptr != '\0'; from->ptr++)
21 			s_putc(to, *from->ptr);
22 		if (*from->ptr == '\'')
23 			from->ptr++;
24 	} else if (*from->ptr == '"') {
25 		from->ptr++;
26 		for (;*from->ptr != '"' && *from->ptr != '\0'; from->ptr++)
27 			s_putc(to, *from->ptr);
28 		if (*from->ptr == '"')
29 			from->ptr++;
30 	} else {
31 		for (;!isspace(*from->ptr) && *from->ptr != '\0'; from->ptr++)
32 			s_putc(to, *from->ptr);
33 	}
34 	s_terminate(to);
35 
36 	/* crunch trailing white */
37 	while(isspace(*from->ptr))
38 		from->ptr++;
39 
40 	return to;
41 }