ts_parse.c - plan9port - [fork] Plan 9 from user space
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       ---
       ts_parse.c (913B)
       ---
            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 }