1 /* Copyright (c) 1979 Regents of the University of California */ 2 3 static char sccsid[] = "@(#)UNPACK.c 1.3 06/10/81"; 4 5 6 /* 7 * unpack(z,a,i) 8 * 9 * with: z and a as in pack 10 * 11 * semantics: for j := u to v do 12 * a[j-u+i] := z[j] 13 */ 14 15 UNPACK(i, a, z, size_a, lb_a, ub_a, size_z) 16 17 long i; /* subscript into a to begin packing */ 18 char *a; /* pointer to structure a */ 19 char *z; /* pointer to structure z */ 20 long size_a; /* sizeof(a_type) */ 21 long lb_a; /* lower bound of structure a */ 22 long ub_a; /* (upper bound of a) - (lb_a + sizeof(z_type)) */ 23 long size_z; /* sizeof(z_type) */ 24 { 25 int subscr; 26 register char *cp; 27 register char *zp = z; 28 register char *limit; 29 30 subscr = i - lb_a; 31 if (subscr < 0 || subscr > ub_a) { 32 ERROR("i = %D: Bad i to unpack(z,a,i)\n", i); 33 return; 34 } 35 cp = &a[subscr * size_a]; 36 limit = cp + size_z; 37 do { 38 *cp++ = *zp++; 39 } while (cp < limit); 40 } 41