4.3BSD - /usr/ingres/source/ovqp/startovqp.c

   1: # include   <ingres.h>
   2: # include   <symbol.h>
   3: # include   <tree.h>
   4: # include   <aux.h>
   5: # include   "../decomp/globs.h"
   6: # include   "../ctlmod/pipes.h"
   7: # include   <signal.h>
   8: # include   <sccs.h>
   9: # include   <errors.h>
  10: # include   <math.h>
  11: # include   <errno.h>
  12: 
  13: SCCSID(@(#)startovqp.c	8.3	1/31/86)
  14: 
  15: /*
  16: **	startovqp is called at the beginning of
  17: **	the execution of ovqp.
  18: */
  19: 
  20: 
  21: startovqp()
  22: {
  23:     extern  flptexcep();
  24: 
  25:     if (Equel)
  26:         startequel();
  27: 
  28:     De.ov_tupsfound = 0;    /* counts the number of tuples which sat the qual */
  29:     De.ov_retrieve = De.ov_bopen = FALSE;
  30:     /* catch floating point signals */
  31:     signal(SIGFPE, (int) flptexcep);
  32: }
  33: 
  34: /*
  35: **	Give a user error for a floating point exceptions
  36: */
  37: flptexcep()
  38: {
  39:     ov_err(FLOATEXCEP);
  40: }
  41: 
  42: /* Someone here in Berkeley thinks this is a good idea. */
  43: /* See 4.3 man 3m intro */
  44: double
  45: infnan(arg)
  46: register arg;
  47: {
  48:     extern int  errno;
  49: 
  50:     switch (arg)
  51:     {
  52:       case ERANGE:
  53:         errno = ERANGE;
  54:         return(HUGE);
  55:       case -ERANGE:
  56:         errno = EDOM;
  57:         return(-HUGE);
  58:       case EDOM:
  59:         errno = EDOM;
  60:         return(0.0);
  61:     }
  62: }

Defined functions