1N/A/***********************************************************************
1N/A* *
1N/A* This software is part of the ast package *
1N/A* Copyright (c) 1985-2011 AT&T Intellectual Property *
1N/A* and is licensed under the *
1N/A* Common Public License, Version 1.0 *
1N/A* by AT&T Intellectual Property *
1N/A* *
1N/A* A copy of the License is available at *
1N/A* http://www.opensource.org/licenses/cpl1.0.txt *
1N/A* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
1N/A* *
1N/A* Information and Software Systems Research *
1N/A* AT&T Research *
1N/A* Florham Park NJ *
1N/A* *
1N/A* Glenn Fowler <gsf@research.att.com> *
1N/A* David Korn <dgk@research.att.com> *
1N/A* Phong Vo <kpv@research.att.com> *
1N/A* *
1N/A***********************************************************************/
1N/A#pragma prototyped
1N/A/*
1N/A * Glenn Fowler
1N/A * AT&T Research
1N/A *
1N/A * internal representation conversion support
1N/A */
1N/A
1N/A#include <ast.h>
1N/A#include <swap.h>
1N/A
1N/A/*
1N/A * return the swap operation for external to internal conversion
1N/A * if size<0 then (-size) used and (-size==4)&&(op==3) => op=7
1N/A * this is a workaround for 4 byte magic predicting 8 byte swap
1N/A */
1N/A
1N/Aint
1N/Aswapop(const void* internal, const void* external, int size)
1N/A{
1N/A register int op;
1N/A register int z;
1N/A char tmp[sizeof(intmax_t)];
1N/A
1N/A if ((z = size) < 0)
1N/A z = -z;
1N/A if (z <= 1)
1N/A return 0;
1N/A if (z <= sizeof(intmax_t))
1N/A for (op = 0; op < z; op++)
1N/A if (!memcmp(internal, swapmem(op, external, tmp, z), z))
1N/A {
1N/A if (size < 0 && z == 4 && op == 3)
1N/A op = 7;
1N/A return op;
1N/A }
1N/A return -1;
1N/A}