4.3BSD - /usr/ingres/source/iutil/setkey.c

   1: # include   <ingres.h>
   2: # include   <symbol.h>
   3: # include   <sccs.h>
   4: 
   5: SCCSID(@(#)setkey.c	8.1	12/31/84)
   6: 
   7: /*
   8: **	Clearkeys - reset all key indicators in descriptor
   9: **
  10: **	Clearkeys is used to clear the key supplied
  11: **	flags before calls to setkey
  12: */
  13: 
  14: 
  15: clearkeys(d)
  16: register DESC   *d;
  17: {
  18:     register int    i;
  19: 
  20:     for (i = 0; i <= d->reldum.relatts; i++)
  21:         d->relgiven[i] = 0;
  22:     return (0);
  23: }
  24: /*
  25: **  SETKEY - indicate a partial key for find
  26: **
  27: **	Setkey is used to set a key value into place
  28: **	in a key. The key can be as large as the entire
  29: **	tuple. Setkey moves the key value into the
  30: **	proper place in the key and marks the value as
  31: **	supplied
  32: **
  33: **	If the value is a null pointer, then the key is
  34: **	cleared.
  35: **
  36: **	Clearkeys should be called once before the
  37: **	first call to setkey.
  38: */
  39: 
  40: setkey(d, key, value, dom)
  41: register DESC   *d;
  42: char        *key;
  43: char        *value;
  44: register int    dom;
  45: {
  46:     register int    len;
  47:     char        *cp;
  48: 
  49: #	ifdef xATR1
  50:     if (tTf(22, 8))
  51:         printf("setkey: %.14s, %d\n", d->reldum.relid, dom);
  52: #	endif
  53: 
  54:     /* check validity of domain number */
  55:     if (dom < 1 || dom > d->reldum.relatts)
  56:         syserr("setkey:rel=%12s,dom=%d", d->reldum.relid, dom);
  57: 
  58:     /* if value is null, clear key */
  59:     if (value == 0)
  60:     {
  61:         d->relgiven[dom] = 0;
  62:         return;
  63:     }
  64: 
  65:     /* mark as given */
  66:     d->relgiven[dom] = 1;
  67: 
  68:     len = d->relfrml[dom] & I1MASK;
  69:     cp = &key[d->reloff[dom]];
  70: 
  71:     if (d->relfrmt[dom] == CHAR)
  72:     {
  73:         pmove(value, cp, len, ' ');
  74:     }
  75:     else
  76:     {
  77:         bmove(value, cp, len);
  78:     }
  79: }

Defined functions