1 /* Copyright (c) 1979 Regents of the University of California */ 2 3 static char sccsid[] = "@(#)UNPACK.c 1.2 03/07/81"; 4 5 #include "h01errs.h" 6 7 /* 8 * unpack(z,a,i) 9 * 10 * with: z and a as in pack 11 * 12 * semantics: for j := u to v do 13 * a[j-u+i] := z[j] 14 */ 15 16 UNPACK(i, a, z, size_a, lb_a, ub_a, size_z) 17 18 long i; /* subscript into a to begin packing */ 19 char *a; /* pointer to structure a */ 20 char *z; /* pointer to structure z */ 21 long size_a; /* sizeof(a_type) */ 22 long lb_a; /* lower bound of structure a */ 23 long ub_a; /* (upper bound of a) - (lb_a + sizeof(z_type)) */ 24 long size_z; /* sizeof(z_type) */ 25 { 26 int subscr; 27 register char *cp; 28 register char *zp = z; 29 register char *limit; 30 31 subscr = i - lb_a; 32 if (subscr < 0 || subscr > ub_a) { 33 ERROR(EPACK, i); 34 return; 35 } 36 cp = &a[subscr * size_a]; 37 limit = cp + size_z; 38 do { 39 *cp++ = *zp++; 40 } while (cp < limit); 41 } 42