50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <lib9.h>
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#include "String.h"
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#define isspace(c) ((c)==' ' || (c)=='\t' || (c)=='\n')
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/* Get the next field from a String. The field is delimited by white space,
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* single or double quotes.
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*/
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String *
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s_parse(String *from, String *to)
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{
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if (*from->ptr == '\0')
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return 0;
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if (to == 0)
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to = s_new();
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if (*from->ptr == '\'') {
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from->ptr++;
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for (;*from->ptr != '\'' && *from->ptr != '\0'; from->ptr++)
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s_putc(to, *from->ptr);
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if (*from->ptr == '\'')
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from->ptr++;
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} else if (*from->ptr == '"') {
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from->ptr++;
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for (;*from->ptr != '"' && *from->ptr != '\0'; from->ptr++)
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s_putc(to, *from->ptr);
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if (*from->ptr == '"')
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from->ptr++;
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} else {
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for (;!isspace(*from->ptr) && *from->ptr != '\0'; from->ptr++)
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s_putc(to, *from->ptr);
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}
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s_terminate(to);
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/* crunch trailing white */
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while(isspace(*from->ptr))
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from->ptr++;
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return to;
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}
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