*DECK CDQAGS SUBROUTINE CDQAGS (LUN, KPRINT, IPASS) C***BEGIN PROLOGUE CDQAGS C***PURPOSE Quick check for DQAGS. C***LIBRARY SLATEC C***TYPE DOUBLE PRECISION (CQAGS-S, CDQAGS-D) C***AUTHOR (UNKNOWN) C***ROUTINES CALLED D1MACH, DF0S, DF1S, DF2S, DF3S, DF4S, DF5S, DPRIN, C DQAGS C***REVISION HISTORY (YYMMDD) C ?????? DATE WRITTEN C 891214 Prologue converted to Version 4.0 format. (BAB) C 901205 Added PASS/FAIL message and changed the name of the first C argument. (RWC) C 910501 Added PURPOSE and TYPE records. (WRB) C 911114 Modified test on IER=4 to allow IER=5. (WRB) C***END PROLOGUE CDQAGS C C FOR FURTHER DOCUMENTATION SEE ROUTINE CQPDOC C DOUBLE PRECISION A,ABSERR,B,D1MACH,EPMACH,EPSABS, * EPSREL,ERROR,EXACT0,EXACT1,EXACT2,EXACT3,EXACT4, * DF0S,DF1S,DF2S,DF3S,DF4S,DF5S,OFLOW,RESULT,UFLOW,WORK INTEGER IER,IP,IPASS,IWORK,KPRINT,LAST,LENW,LIMIT,NEVAL DIMENSION IERV(5),IWORK(200),WORK(800) EXTERNAL DF0S,DF1S,DF2S,DF3S,DF4S,DF5S DATA EXACT0/0.2D+01/ DATA EXACT1/0.115470066904D+01/ DATA EXACT2/0.909864525656D-02/ DATA EXACT3/0.31415926535897932D+01/ DATA EXACT4/0.19984914554328673D+04/ C***FIRST EXECUTABLE STATEMENT CDQAGS IF (KPRINT.GE.2) WRITE (LUN, '(''1DQAGS QUICK CHECK''/)') C C TEST ON IER = 0 C IPASS = 1 LIMIT = 200 LENW = LIMIT*4 EPSABS = 0.0D+00 EPMACH = D1MACH(4) EPSREL = MAX(SQRT(EPMACH),0.1D-07) A = 0.0D+00 B = 0.1D+01 CALL DQAGS(DF0S,A,B,EPSABS,EPSREL,RESULT,ABSERR,NEVAL,IER, * LIMIT,LENW,LAST,IWORK,WORK) ERROR = ABS(RESULT-EXACT0) IERV(1) = IER IP = 0 IF(IER.EQ.0.AND.ERROR.LE.EPSREL*ABS(EXACT0)) * IP = 1 IF(IP.EQ.0) IPASS = 0 CALL DPRIN(LUN,0,KPRINT,IP,EXACT0,RESULT,ABSERR,NEVAL,IERV,1) C C TEST ON IER = 1 C CALL DQAGS(DF1S,A,B,EPSABS,EPSREL,RESULT,ABSERR,NEVAL,IER, * 1,4,LAST,IWORK,WORK) IERV(1) = IER IP = 0 IF(IER.EQ.1)IP = 1 IF(IP.EQ.0) IPASS = 0 CALL DPRIN(LUN,1,KPRINT,IP,EXACT1,RESULT,ABSERR,NEVAL,IERV,1) C C TEST ON IER = 2 OR 4 OR 1 C UFLOW = D1MACH(1) A = 0.1D+00 CALL DQAGS(DF2S,A,B,UFLOW,0.0D+00,RESULT,ABSERR,NEVAL,IER, * LIMIT,LENW,LAST,IWORK,WORK) IERV(1) = IER IERV(2) = 4 IERV(3) = 1 IP = 0 IF(IER.EQ.2.OR.IER.EQ.4.OR.IER.EQ.1) IP = 1 IF(IP.EQ.0) IPASS = 0 CALL DPRIN(LUN,2,KPRINT,IP,EXACT2,RESULT,ABSERR,NEVAL,IERV,3) C C TEST ON IER = 3 OR 4 OR 1 OR 2 C A = 0.0D+00 B = 0.5D+01 CALL DQAGS(DF3S,A,B,UFLOW,0.0D+00,RESULT,ABSERR,NEVAL,IER, * LIMIT,LENW,LAST,IWORK,WORK) IERV(1) = IER IERV(2) = 4 IERV(3) = 1 IERV(4) = 2 IP = 0 IF(IER.EQ.3.OR.IER.EQ.4.OR.IER.EQ.1.OR.IER.EQ.2) IP = 1 IF(IP.EQ.0) IPASS = 0 CALL DPRIN(LUN,3,KPRINT,IP,EXACT3,RESULT,ABSERR,NEVAL,IERV,4) C C TEST ON IER = 4, OR 5 OR 3 OR 1 OR 0 C B = 0.1D+01 CALL DQAGS(DF4S,A,B,EPSABS,EPSREL,RESULT,ABSERR,NEVAL,IER, * LIMIT,LENW,LAST,IWORK,WORK) IERV(1) = IER IERV(2) = 5 IERV(3) = 3 IERV(4) = 1 IERV(5) = 0 IP = 0 IF(IER.EQ.5.OR.IER.EQ.4.OR.IER.EQ.3.OR.IER.EQ.1.OR.IER.EQ.0) * IP = 1 IF(IP.EQ.0) IPASS = 0 CALL DPRIN(LUN,4,KPRINT,IP,EXACT4,RESULT,ABSERR,NEVAL,IERV,5) C C TEST ON IER = 5 C OFLOW = D1MACH(2) CALL DQAGS(DF5S,A,B,EPSABS,EPSREL,RESULT,ABSERR,NEVAL,IER, * LIMIT,LENW,LAST,IWORK,WORK) IERV(1) = IER IP = 0 IF(IER.EQ.5) IP = 1 IF(IP.EQ.0) IPASS = 0 CALL DPRIN(LUN,5,KPRINT,IP,OFLOW,RESULT,ABSERR,NEVAL,IERV,1) C C TEST ON IER = 6 C CALL DQAGS(DF1S,A,B,EPSABS,0.0D+00,RESULT,ABSERR,NEVAL,IER, * LIMIT,LENW,LAST,IWORK,WORK) IERV(1) = IER IP = 0 IF(IER.EQ.6.AND.RESULT.EQ.0.0D+00.AND.ABSERR.EQ.0.0D+00.AND. * NEVAL.EQ.0.AND.LAST.EQ.0) IP = 1 IF(IP.EQ.0) IPASS = 0 CALL DPRIN(LUN,6,KPRINT,IP,EXACT1,RESULT,ABSERR,NEVAL,IERV,1) C IF (KPRINT.GE.1) THEN IF (IPASS.EQ.0) THEN WRITE(LUN, '(/'' SOME TEST(S) IN CDQAGS FAILED''/)') ELSEIF (KPRINT.GE.2) THEN WRITE(LUN, '(/'' ALL TEST(S) IN CDQAGS PASSED''/)') ENDIF ENDIF RETURN END