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faster to_lower and to_upper #733

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merged 8 commits into from
Oct 13, 2023
Merged

faster to_lower and to_upper #733

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a0a03b8
faster to_lower and to_upper
jalvesz Mar 24, 2023
71337ba
Merge branch 'fortran-lang:master' into master
jalvesz Aug 28, 2023
8b7b1e8
faster chat_to_lower/upper
jalvesz Sep 12, 2023
a2aad14
Merge branch 'fortran-lang:master' into master
jalvesz Sep 12, 2023
b8dd3b4
to_lower/upper clearer constants definition
jalvesz Sep 14, 2023
c616095
Merge branch 'master' of https://github.com/jalvesz/stdlib
jalvesz Sep 14, 2023
27e928a
implicit whitespace shift parameter identification
jalvesz Oct 11, 2023
3e0811a
Merge branch 'fortran-lang:master' into master
jalvesz Oct 12, 2023
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14 changes: 10 additions & 4 deletions src/stdlib_ascii.fypp
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Original file line number Diff line number Diff line change
Expand Up @@ -257,10 +257,13 @@ contains
pure function to_lower(string) result(lower_string)
character(len=*), intent(in) :: string
character(len=len(string)) :: lower_string
integer :: i
integer, parameter :: wp= 32, la=65, lz= 90
integer :: i, icar

do i = 1, len(string)
lower_string(i:i) = char_to_lower(string(i:i))
icar= ichar(string(i:i))
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Why did you not modify char_to_lower instead of each occurence?

if (icar>=la.and.icar<=lz) icar= icar + wp
lower_string(i:i) = char(icar)
end do

end function to_lower
Expand All @@ -272,10 +275,13 @@ contains
pure function to_upper(string) result(upper_string)
character(len=*), intent(in) :: string
character(len=len(string)) :: upper_string
integer :: i
integer, parameter :: wp= 32, BA=97, BZ= 122
integer :: i, icar

do i = 1, len(string)
upper_string(i:i) = char_to_upper(string(i:i))
icar= ichar(string(i:i))
if (icar>=BA.and.icar<=BZ) icar= icar - wp
upper_string(i:i) = char(icar)
end do

end function to_upper
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