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Standardize the output of tiny real values #302

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Jan 7, 2023
Merged

Standardize the output of tiny real values #302

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30 changes: 22 additions & 8 deletions src/framework/MOM_document.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -637,19 +637,33 @@ function real_string(val)
elseif (val == 0.) then
real_string = "0.0"
else
if ((abs(val) <= 1.0e-100) .or. (abs(val) >= 1.0e100)) then
write(real_string(1:32), '(ES24.14E3)') val
if (.not.testFormattedFloatIsReal(real_string,val)) &
write(real_string(1:32), '(ES24.15E3)') val
if ((abs(val) < 1.0e-99) .or. (abs(val) >= 1.0e100)) then
write(real_string(1:32), '(ES24.14E4)') val
if (scan(real_string, "eE") == 0) then ! Fix a bug with a missing E in PGI formatting
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ind = scan(real_string, "-+", back=.true.)
if (ind > index(real_string, ".") ) & ! Avoid changing a leading sign.
real_string = real_string(1:ind-1)//"E"//real_string(ind:)
endif
if (.not.testFormattedFloatIsReal(real_string, val)) then
write(real_string(1:32), '(ES25.15E4)') val
if (scan(real_string, "eE") == 0) then ! Fix a bug with a missing E in PGI formatting
ind = scan(real_string, "-+", back=.true.)
if (ind > index(real_string, ".") ) & ! Avoid changing a leading sign.
real_string = real_string(1:ind-1)//"E"//real_string(ind:)
endif
endif
! Remove a leading 0 from the exponent, if it is there.
ind = max(index(real_string, "E+0"), index(real_string, "E-0"))
if (ind > 0) real_string = real_string(1:ind+1)//real_string(ind+3:)
else
write(real_string(1:32), '(ES23.14)') val
if (.not.testFormattedFloatIsReal(real_string,val)) &
if (.not.testFormattedFloatIsReal(real_string, val)) &
write(real_string(1:32), '(ES23.15)') val
endif
do
ind = index(real_string,"0E")
do ! Remove extra trailing 0s before the exponent.
ind = index(real_string, "0E")
if (ind == 0) exit
if (real_string(ind-1:ind-1) == ".") exit
if (real_string(ind-1:ind-1) == ".") exit ! Leave at least one digit after the decimal point.
real_string = real_string(1:ind-1)//real_string(ind+1:)
enddo
endif
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