2022-02-20 20:43:24 +00:00
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#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <mouse.h>
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2022-02-22 05:52:56 +00:00
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#include "frame.h"
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2022-02-20 20:43:24 +00:00
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#define CHUNK 16
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#define ROUNDUP(n) ((n + CHUNK) & ~(CHUNK - 1))
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uchar* _frallocstr(Frame* f, unsigned n) {
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uchar* p;
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p = malloc(ROUNDUP(n));
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if (p == 0)
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drawerror(f->display, "out of memory");
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return p;
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}
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void _frinsure(Frame* f, int bn, unsigned n) {
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Frbox* b;
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uchar* p;
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b = &f->box[bn];
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if (b->nrune < 0)
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drawerror(f->display, "_frinsure");
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if (ROUNDUP(b->nrune) > n) /* > guarantees room for terminal NUL */
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return;
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p = _frallocstr(f, n);
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b = &f->box[bn];
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memmove(p, b->ptr, NBYTE(b) + 1);
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free(b->ptr);
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b->ptr = p;
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}
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