16 |
C \==========================================================/ |
C \==========================================================/ |
17 |
IMPLICIT NONE |
IMPLICIT NONE |
18 |
C Returns TRUE if val1 and val2 are different multiples of freq. |
C Returns TRUE if val1 and val2 are different multiples of freq. |
19 |
REAL freq, val1, val2 |
_RL freq, val1, val2 |
20 |
CEndofinterface |
CEndofinterface |
21 |
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_RL f, v1, v2, v3, v4, d1, d2, d3, step |
22 |
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|
23 |
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C o Do easy cases first. |
24 |
DIFFERENT_MULTIPLE = .FALSE. |
DIFFERENT_MULTIPLE = .FALSE. |
25 |
IF ( freq .EQ. 0. ) THEN |
IF ( freq .EQ. 0. ) RETURN |
26 |
DIFFERENT_MULTIPLE = .FALSE. |
IF ( ABS(val1-val2) .GT. freq ) THEN |
27 |
ELSE |
DIFFERENT_MULTIPLE = .TRUE. |
28 |
DIFFERENT_MULTIPLE = INT(val1/freq) .NE. INT(val2/freq) |
RETURN |
29 |
ENDIF |
ENDIF |
|
END |
|
30 |
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|
31 |
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C o This case is more complex because of round-off error |
32 |
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f = freq |
33 |
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v1 = val1 |
34 |
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v2 = val2 |
35 |
|
step = v1-v2 |
36 |
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37 |
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C Test v1 to see if its a "closest multiple" |
38 |
|
v3 = v1 + step |
39 |
|
v4 = NINT(v1/f)*f |
40 |
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d1 = v1-v4 |
41 |
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d2 = v2-v4 |
42 |
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d3 = v3-v4 |
43 |
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IF ( ABS(d1) .LE. ABS(d2) .AND. |
44 |
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& ABS(d1) .LE. ABS(d3) ) DIFFERENT_MULTIPLE = .TRUE. |
45 |
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|
46 |
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END |