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- #include <u.h>
- #include <libc.h>
- #include "String.h"
- #define isspace(c) ((c)==' ' || (c)=='\t' || (c)=='\n')
- /* Get the next field from a String. The field is delimited by white space,
- * single or double quotes.
- */
- String *
- s_parse(String *from, String *to)
- {
- if (*from->ptr == '\0')
- return 0;
- if (to == 0)
- to = s_new();
- if (*from->ptr == '\'') {
- from->ptr++;
- for (;*from->ptr != '\'' && *from->ptr != '\0'; from->ptr++)
- s_putc(to, *from->ptr);
- if (*from->ptr == '\'')
- from->ptr++;
- } else if (*from->ptr == '"') {
- from->ptr++;
- for (;*from->ptr != '"' && *from->ptr != '\0'; from->ptr++)
- s_putc(to, *from->ptr);
- if (*from->ptr == '"')
- from->ptr++;
- } else {
- for (;!isspace(*from->ptr) && *from->ptr != '\0'; from->ptr++)
- s_putc(to, *from->ptr);
- }
- s_terminate(to);
- /* crunch trailing white */
- while(isspace(*from->ptr))
- from->ptr++;
- return to;
- }
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