/*- * Copyright (c) 1979, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char sccsid[] = "@(#)PACK.c 8.1 (Berkeley) 6/6/93"; #endif /* not lint */ /* * pack(a,i,z) * * with: a: array[m..n] of t * z: packed array[u..v] of t * * semantics: for j := u to v do * z[j] := a[j-u+i]; * * need to check: * 1. i >= m * 2. i+(v-u) <= n (i.e. i-m <= (n-m)-(v-u)) * * on stack: lv(z), lv(a), rv(i) (len 4) * * move w(t)*(v-u+1) bytes from lv(a)+w(t)*(i-m) to lv(z) */ PACK(i, a, z, size_a, lb_a, ub_a, size_z) long i; /* subscript into a to begin packing */ char *a; /* pointer to structure a */ char *z; /* pointer to structure z */ long size_a; /* sizeof(a_type) */ long lb_a; /* lower bound of structure a */ long ub_a; /* (upper bound of a) - (lb_a + sizeof(z_type)) */ long size_z; /* sizeof(z_type) */ { int subscr; register char *cp; register char *zp = z; register char *limit; subscr = i - lb_a; if (subscr < 0 || subscr > ub_a) { ERROR("i = %D: Bad i to pack(a,i,z)\n", i); return; } cp = &a[subscr * size_a]; limit = cp + size_z; do { *zp++ = *cp++; } while (cp < limit); }