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