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#include <assert.h>
#include "types.h"
#include "instset.h"
sbool
si_isInst(sbyte inst)
{
return inst < SINST_COUNT;
}
static sbool
isBetween(sbyte inst, sbyte lo, sbyte hi)
{
assert(si_isInst(inst));
assert(lo < SINST_COUNT);
assert(hi < SINST_COUNT);
if (inst < lo) {
return SFALSE;
}
if (inst > hi) {
return SFALSE;
}
return STRUE;
}
sbool
si_isMod(sbyte inst)
{
assert(si_isInst(inst));
return isBetween(inst, SNOP0, SNOP3);
}
sbool
si_isKey(sbyte inst)
{
assert(si_isInst(inst));
return isBetween(inst, SKEYA, SKEYP);
}
sbool
si_isLock(sbyte inst)
{
assert(si_isInst(inst));
return isBetween(inst, SLOKA, SLOKP);
}
sbool
si_keyLockMatch(sbyte key, sbyte lock)
{
assert(si_isKey(key));
assert(si_isInst(lock));
return (key - SKEYA) == (lock - SLOKA);
}
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