units.c

利用语言编写的有限元分析软件

/*
 *  ============================================================================= 
 *  ALADDIN Version 1.0 :
 *              units.c : Functions to Handle Engineering Units/Dimensions
 *                                                                     
 *  Copyright (C) 1995 by Mark Austin, Xiaoguang Chen, and Wane-Jang Lin
 *  Institute for Systems Research,                                           
 *  University of Maryland, College Park, MD 20742                                   
 *                                                                     
 *  This software is provided "as is" without express or implied warranty.
 *  Permission is granted to use this software for any on any computer system
 *  and to redistribute it freely, subject to the following restrictions:
 * 
 *  1. The authors are not responsible for the consequences of use of
 *     this software, even if they arise from defects in the software.
 *  2. The origin of this software must not be misrepresented, either
 *     by explicit claim or by omission.
 *  3. Altered versions must be plainly marked as such, and must not
 *     be misrepresented as being the original software.
 *  4. This notice is to remain intact.
 *                                                                    
 *  Written  by: M.A. Austin, Xiaoguang Chen, and Wane-Jang Lin     December 1995
 *  ============================================================================= 
 */

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>

#ifdef  __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif

#include "defs.h"
#include "miscellaneous.h"
#include "units.h"
#include "matrix.h"
#include "fe_database.h"
#include "symbol.h"

static enum{UNITS_OFF, UNITS_ON} iFlag = UNITS_ON;

/* #define DEBUG */

/*
 *  ===========================================================
 *  Utility Functions for Units Operations
 *  
 *  SetUnitsOn()     : Set flag for units "on"
 *  SetUnitsOff()    : Set flag for units "off"
 *  CheckUnits()     : Flag to see if units are "on" or "off"
 *  CheckUnitsType() : Check type of units
 *  ===========================================================
 */

int SetUnitsOn(){
    iFlag = UNITS_ON;  
}

int SetUnitsOff(){
    iFlag = UNITS_OFF;  
}

int CheckUnits(){
    return(iFlag);
}

int CheckUnitsType(){
    return(UNITS_TYPE);
}


/*
 *  ========================================
 *  Do two quantities have the same units ??
 *  ========================================
 */

#ifdef __STDC__
int SameUnits(DIMENSIONS *d1, DIMENSIONS *d2)
#else
int SameUnits(d1, d2)
DIMENSIONS *d1, *d2;
#endif
{
    if((d1->length_expnt  == d2->length_expnt) &&
       (d1->mass_expnt    == d2->mass_expnt)   &&
       (d1->time_expnt    == d2->time_expnt)   &&
       (d1->temp_expnt    == d2->temp_expnt))  {
         return TRUE;
    }
    else {
         return FALSE;
    }
}

/*
 *  =================================
 *  Functions for Operations on Units
 *  =================================
 */

#ifdef __STDC__
DIMENSIONS *UnitsMult(DIMENSIONS *d1, DIMENSIONS *d2)
#else
DIMENSIONS *UnitsMult(d1, d2)
DIMENSIONS *d1, *d2;
#endif
{
DIMENSIONS         *d;
DIMENSIONS *dp1, *dp2;
int            length;

    if( d1==(DIMENSIONS *)NULL || d2==(DIMENSIONS *)NULL ) {
        printf("Warning: d1 or d2 is NULL,   in UnitsMult()\n");
        return (DIMENSIONS *)NULL;
    }

    d   = (DIMENSIONS *) MyCalloc(1, sizeof(DIMENSIONS));
    dp1 = (DIMENSIONS *) MyCalloc(1, sizeof(DIMENSIONS));
    dp2 = (DIMENSIONS *) MyCalloc(1, sizeof(DIMENSIONS));

    UnitsCopy(dp1,d1);
    UnitsCopy(dp2,d2);

    if(dp1->units_type == dp2->units_type) {
       d->units_type = dp1->units_type;
    }
    else {
       if( dp1->units_type==SI && dp2->units_type==US ) {
           d->units_type = SI;
           if( dp2->units_name != (char *)NULL )
              UnitsTypeConvert( dp2, SI );
       }
       else if( dp1->units_type==US && dp2->units_type==SI ) {
           d->units_type = SI;
           if( dp1->units_name != (char *)NULL )
              UnitsTypeConvert( dp1, SI );
       }
       else if(dp1->units_type == SI_US)
           d->units_type = dp2->units_type;
       else if(dp2->units_type == SI_US)
           d->units_type = dp1->units_type;
    }
	
    if( dp1->units_name!=(char *)NULL ) {
       length = UnitsLength(dp1->units_name,dp2->units_name,"STOP");
       d->units_name = (char *)MyCalloc(length+2,sizeof(char));
       d->units_name = strcpy(d->units_name, dp1->units_name);
       if( dp2->units_name!=(char *)NULL ) {
          d->units_name = strcat(d->units_name, (char *) ".");
          d->units_name = strcat(d->units_name, dp2->units_name);
       }
    }
    else if( dp2->units_name!=(char *)NULL )
       d->units_name = SaveString(dp2->units_name);
    else
       d->units_name = (char *)NULL;

    d->scale_factor = dp1->scale_factor*dp2->scale_factor;
    d->length_expnt = dp1->length_expnt + dp2->length_expnt;
    d->mass_expnt = dp1->mass_expnt + dp2->mass_expnt;
    d->time_expnt = dp1->time_expnt + dp2->time_expnt;
    d->temp_expnt = dp1->temp_expnt + dp2->temp_expnt;

    free((char *)dp1->units_name);
    free((char *)dp1);
    free((char *)dp2->units_name);
    free((char *)dp2);

    return (d);
}

#ifdef __STDC__
DIMENSIONS *UnitsMultRep(DIMENSIONS *d, DIMENSIONS *d1, DIMENSIONS *d2)
#else
DIMENSIONS *UnitsMultRep(d, d1, d2)
DIMENSIONS       *d;
DIMENSIONS *d1, *d2;
#endif
{
DIMENSIONS *dp1, *dp2;
int            length;

    if( d1==(DIMENSIONS *)NULL || d2==(DIMENSIONS *)NULL ) {
        printf("Warning: d1 or d2 is NULL,   in UnitsMultRep()\n");
        free((char *)d->units_name);
        free((char *)d);
        d = (DIMENSIONS *)NULL;
        return (DIMENSIONS *)NULL;
    }

    dp1 = (DIMENSIONS *) MyCalloc(1, sizeof(DIMENSIONS));
    dp2 = (DIMENSIONS *) MyCalloc(1, sizeof(DIMENSIONS));

    UnitsCopy(dp1,d1);
    UnitsCopy(dp2,d2);

    if(dp1->units_type == dp2->units_type) {
       d->units_type = dp1->units_type;
    }
    else {
       if( dp1->units_type==SI && dp2->units_type==US ) {
           d->units_type = SI;
           if( dp2->units_name != (char *)NULL )
              UnitsTypeConvert( dp2, SI );
       }
       else if( dp1->units_type==US && dp2->units_type==SI ) {
           d->units_type = SI;
           if( dp1->units_name != (char *)NULL )
              UnitsTypeConvert( dp1, SI );
       }
       else if(dp1->units_type == SI_US)
           d->units_type = dp2->units_type;
       else if(dp2->units_type == SI_US)
           d->units_type = dp1->units_type;
    }
	
    if( dp1->units_name!=(char *)NULL ) {
       free((char *)d->units_name);
       length = UnitsLength(dp1->units_name,dp2->units_name,"STOP");
       d->units_name = (char *)MyCalloc(length+2,sizeof(char));
       d->units_name = strcpy(d->units_name, dp1->units_name);
       if( dp2->units_name!=(char *)NULL ) {
          d->units_name = strcat(d->units_name, (char *) ".");
          d->units_name = strcat(d->units_name, dp2->units_name);
       }
    }
    else if( dp2->units_name!=(char *)NULL ) {
       free((char *)d->units_name);
       d->units_name = SaveString(dp2->units_name);
    }
    else {
       free((char *)d->units_name);
       d->units_name = (char *)NULL;
    }

    d->scale_factor = dp1->scale_factor*dp2->scale_factor;
    d->length_expnt = dp1->length_expnt + dp2->length_expnt;
    d->mass_expnt = dp1->mass_expnt + dp2->mass_expnt;
    d->time_expnt = dp1->time_expnt + dp2->time_expnt;
    d->temp_expnt = dp1->temp_expnt + dp2->temp_expnt;

    free((char *)dp1->units_name);
    free((char *)dp1);
    free((char *)dp2->units_name);
    free((char *)dp2);

    return (d);
}

#ifdef __STDC__
DIMENSIONS *UnitsDiv( DIMENSIONS *d1, DIMENSIONS *d2, int FLAG )
#else
DIMENSIONS *UnitsDiv( d1, d2, FLAG )
DIMENSIONS *d1, *d2;
int            FLAG;           /* YES or NO flag : to determine wheather "()" is needed */
#endif
{
DIMENSIONS         *d;
DIMENSIONS *dp1, *dp2;
int            length;

    if( d2==(DIMENSIONS *)NULL )
        FatalError("In UnitsDiv() : unit divider is a NULL pointer",(char *)NULL);

    if( d1==(DIMENSIONS *)NULL ) {
        printf("Warning: d1 is NULL,   in UnitsDiv()\n");
        return (DIMENSIONS *)NULL;
    }

    d   = (DIMENSIONS *) MyCalloc(1, sizeof(DIMENSIONS));
    dp1 = (DIMENSIONS *) MyCalloc(1, sizeof(DIMENSIONS));
    dp2 = (DIMENSIONS *) MyCalloc(1, sizeof(DIMENSIONS));

    UnitsCopy(dp1,d1);
    UnitsCopy(dp2,d2);

    if(dp1->units_type == dp2->units_type) {
       d->units_type = dp1->units_type;
    }
    else {
       if( dp1->units_type==SI && dp2->units_type==US ) {
           d->units_type = SI;
           if( dp2->units_name != (char *)NULL )
              UnitsTypeConvert( dp2, SI );
       }
       else if( dp1->units_type==US && dp2->units_type==SI ) {
           d->units_type = SI;
           if( dp1->units_name != (char *)NULL )
              UnitsTypeConvert( dp1, SI );
       }
       else if(dp1->units_type == SI_US)
           d->units_type = dp2->units_type;
       else if(dp2->units_type == SI_US)
           d->units_type = dp1->units_type;
    }
	
    if(dp1->units_name != (char *)NULL) {
       if( FLAG == YES) { 
          length = UnitsLength(dp1->units_name,dp2->units_name,"STOP");
          d->units_name = (char *)MyCalloc(length+6,sizeof(char));
          d->units_name = strcpy(d->units_name, (char *) "(");
          d->units_name = strcat(d->units_name, dp1->units_name);
          d->units_name = strcat(d->units_name, (char *) ")");
          if( dp2->units_name!=(char *)NULL ) {
              d->units_name = strcat(d->units_name, (char *) "/(");
              d->units_name = strcat(d->units_name, dp2->units_name);
              d->units_name = strcat(d->units_name, (char *) ")");
          }
       }
       else {
          length = UnitsLength(dp1->units_name,dp2->units_name,"STOP");
          d->units_name = (char *)MyCalloc(length+2,sizeof(char));
          d->units_name = strcpy(d->units_name, dp1->units_name);
          if( dp2->units_name!=(char *)NULL ) {
              d->units_name = strcat(d->units_name, (char *) "/");
              d->units_name = strcat(d->units_name, dp2->units_name);
          }
       } 
    }
    else if(dp2->units_name != (char *)NULL) {
       if( FLAG == YES) { 
          length = UnitsLength(dp2->units_name,"STOP");
          d->units_name = (char *)MyCalloc(length+5,sizeof(char));
          d->units_name = strcpy(d->units_name, (char *)"1/(");
          d->units_name = strcat(d->units_name, dp2->units_name);
          d->units_name = strcat(d->units_name, (char *) ")");
       }
       else {
          length = UnitsLength(dp2->units_name,"STOP");
          d->units_name = (char *)MyCalloc(length+3,sizeof(char));
          d->units_name = strcpy(d->units_name, (char *)"1/");
          d->units_name = strcat(d->units_name, dp2->units_name);
       }
    }
    else
       d->units_name = (char *)NULL;

    d->scale_factor = dp1->scale_factor/dp2->scale_factor;
    d->length_expnt = dp1->length_expnt - dp2->length_expnt;
    d->mass_expnt = dp1->mass_expnt - dp2->mass_expnt;
    d->time_expnt = dp1->time_expnt - dp2->time_expnt;
    d->temp_expnt = dp1->temp_expnt - dp2->temp_expnt;

    free((char *)dp1->units_name);
    free((char *)dp1);
    free((char *)dp2->units_name);
    free((char *)dp2);

    return (d);
}

#ifdef __STDC__
DIMENSIONS *UnitsDivRep( DIMENSIONS *d, DIMENSIONS *d1, DIMENSIONS *d2, int FLAG )
#else
DIMENSIONS *UnitsDivRep( d, d1, d2, FLAG )
DIMENSIONS       *d;
DIMENSIONS *d1, *d2;
int            FLAG;           /* YES or NO flag : to determine wheather "()" is needed */
#endif
{
DIMENSIONS *dp1, *dp2;
int            length;

#ifdef DEBUG
    printf(" Enter UnitsDivRep() :\n");
#endif

    if( d2==(DIMENSIONS *)NULL )
        FatalError("In UnitsDivRep() : unit divider is a NULL pointer",(char *)NULL);

    if( d1==(DIMENSIONS *)NULL ) {
        printf("Warning: d1 is NULL,   in UnitsDivRep()\n");
        free((char *)d->units_name);
        free((char *)d);
        d = (DIMENSIONS *)NULL;
        return (DIMENSIONS *)NULL;
    }

    dp1 = (DIMENSIONS *) MyCalloc(1, sizeof(DIMENSIONS));
    dp2 = (DIMENSIONS *) MyCalloc(1, sizeof(DIMENSIONS));

    UnitsCopy(dp1,d1);
    UnitsCopy(dp2,d2);

    if(dp1->units_type == dp2->units_type) {
       d->units_type = dp1->units_type;
    }
    else {
       if( dp1->units_type==SI && dp2->units_type==US ) {
           d->units_type = SI;
           if( dp2->units_name != (char *)NULL )
              UnitsTypeConvert( dp2, SI );
       }
       else if( dp1->units_type==US && dp2->units_type==SI ) {
           d->units_type = SI;
           if( dp1->units_name != (char *)NULL )
              UnitsTypeConvert( dp1, SI );
       }
       else if(dp1->units_type == SI_US)
           d->units_type = dp2->units_type;
       else if(dp2->units_type == SI_US)
           d->units_type = dp1->units_type;
    }