44 lines
974 B
C
44 lines
974 B
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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/* grow a String's allocation by at least `incr' bytes */
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extern String*
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s_grow(String *s, int incr)
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{
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char *cp;
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int size;
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if(s->fixed)
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sysfatal("s_grow of constant string");
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s = s_unique(s);
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/*
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* take a larger increment to avoid mallocing too often
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*/
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size = s->end-s->base;
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if(size/2 < incr)
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size += incr;
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else
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size += size/2;
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cp = realloc(s->base, size);
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if (cp == 0)
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sysfatal("s_grow: %r");
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s->ptr = (s->ptr - s->base) + cp;
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s->end = cp + size;
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s->base = cp;
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return s;
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}
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