50 lines
980 B
C
50 lines
980 B
C
#include <m2_traps.h>
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struct descr {
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char *addr;
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int low;
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unsigned int highminlow;
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unsigned int size;
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};
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static struct descr *descrs[10];
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static struct descr **ppdescr = descrs;
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char *
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_new_stackptr(pdescr, a)
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register struct descr *pdescr;
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{
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unsigned int size = (((pdescr->highminlow + 1) * pdescr->size +
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(EM_WSIZE - 1)) & ~(EM_WSIZE - 1));
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if (ppdescr >= &descrs[10]) {
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/* to many nested traps + handlers ! */
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TRP(M2_TOOMANY);
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}
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*ppdescr++ = pdescr;
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if ((char *) &a - (char *) &size > 0) {
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/* stack grows downwards */
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return (char *) &a - size;
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}
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else return (char *) &a + size;
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}
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_copy_array(p, a)
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register char *p;
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{
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register char *q;
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register unsigned int sz;
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char dummy;
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ppdescr--;
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sz = (((*ppdescr)->highminlow + 1) * (*ppdescr)->size +
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(EM_WSIZE -1)) & ~ (EM_WSIZE - 1);
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if ((char *) &a - (char *) &dummy > 0) {
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(*ppdescr)->addr = q = (char *) &a;
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}
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else (*ppdescr)->addr = q = (char *) &a - sz;
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while (sz--) *q++ = *p++;
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}
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