Source Code
! Copyright 2019 Khang Hoang Nguyen
!
! Permission is hereby granted, free of charge, to any person obtaining
! a copy of this software and associated documentation files
! (the "Software"), to deal in the Software without restriction,
! including without limitation the rights to use, copy, modify, merge,
! publish, distribute, sublicense, and/or sell copies of the Software,
! and to permit persons to whom the Software is furnished to do so,
! subject to the following conditions
!
! The above copyright notice and this permission notice shall be
! included in all copies or substantial portions of the Software.
!
! THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
! EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
! MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
! NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
! BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
! ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
! CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
! SOFTWARE.
!| author: Khang Hoang Nguyen
! license: <a href="https://github.com/kevinhng86/faiNumber-Fortran/blob/master/LICENSE">MIT</a>
! since: 1.0.0.f
!
! <p>This module, <code>fnInt32Util</code> contains procedures for
! converting int32 values to various type of numerical strings.
! </p>
!
! @note Unless stated otherwise, procedures of this module are pure
! procedures.
module fnInt32Util
use fnConsts
implicit none
integer(k_int32), parameter :: int32_min = -2147483647 - 1
private :: int32_min
contains
!| author: Khang Hoang Nguyen
! since: 1.0.0.f
!
! <p>Convert the `input` of type int32 to an unsigned binary
! string as if the bits are unsigned bits.
!
! <p>This function returns an unsigned binary string of the `input`
! value.
!
! <p>The string that is returned by this function will always have
! a length of 32. The return string will never have leading zeroes.
! Values within the return string will always be right justified.
! Whitespaces will fill the left side of the return string if there
! is not enough values to fill the string.
! </p>
pure character(len=32) function int32ToBinaryAsU(input) result(strOut)
implicit none
integer(k_int32), intent(in) :: input !! An int32 value.
integer(k_int32) :: v
integer(k_int32) :: si, i
strOut = " "
if ( input == 0 ) then
strOut(32:32) = charzero
return
end if
v = input
if ( input < 0 ) then
strOut(29:32) = fnbinv(INT(IBITS(v, 0, 4), k_int32))
strOut(25:28) = fnbinv(INT(IBITS(v, 4, 4), k_int32))
strOut(21:24) = fnbinv(INT(IBITS(v, 8, 4), k_int32))
strOut(17:20) = fnbinv(INT(IBITS(v, 12, 4), k_int32))
strOut(13:16) = fnbinv(INT(IBITS(v, 16, 4), k_int32))
strOut(9:12) = fnbinv(INT(IBITS(v, 20, 4), k_int32))
strOut(5:8) = fnbinv(INT(IBITS(v, 24, 4), k_int32))
strOut(1:4) = fnbinv(INT(IBITS(v, 28, 4), k_int32))
return
end if
si = 1
do while( IBITS(v,(29 - si), 4) == 0 )
si = si + 4
end do
strOut(si:si+3) = fnbinv(IBITS(v, (29 - si), 4))
i = si + 4
do while ( si < i )
if ( strOut(si:si) == charzero ) then
strOut(si:si) = charspace
si = si + 1
else
si = i
end if
end do
do while( si < 32 )
strOut(si:si+3) = fnbinv(IBITS(v, (29 - si), 4))
si = si + 4
end do
end function int32ToBinaryAsU
!| author: Khang Hoang Nguyen
! since: 1.0.0.f
!
! <p>Convert the `input` of type int32 to a signed binary string.
!
! <p>This function returns a signed binary string of the `input`
! value.
!
! <p>The string that is returned by this function will always have
! a length of 33. The return string will never have leading zeroes.
! Values within the return string will always be right justified.
! Whitespaces will fill the left side of the return string if there
! is not enough values to fill the string.
! </p>
pure character(len=33) function int32ToBinary(input) result(strOut)
implicit none
integer(k_int32), intent(in) :: input !! An int32 value.
integer(k_int32) :: v
integer(k_int32) :: si, i
strOut = " "
if ( input == 0 ) then
strOut(33:33) = charzero
return
else if ( input == int32_min ) then
strOut = "-10000000000000000000000000000000"
return
end if
if ( input < 0 ) then
v = not(input) + 1
else
v = input
end if
si = 2
do while( IBITS(v,(30 - si), 4) == 0 )
si = si + 4
end do
strOut(si:si+3) = fnbinv(IBITS(v, (30 - si), 4))
i = si + 4
do while ( si < i )
if ( strOut(si:si) == charzero ) then
strOut(si:si) = charspace
si = si + 1
else
if ( input < 0 ) then
si = si - 1
strOut(si:si) = charneg
end if
si = i
end if
end do
do while( si < 32 )
strOut(si:si+3) = fnbinv(IBITS(v, (30 - si), 4))
si = si + 4
end do
end function int32ToBinary
!| author: Khang Hoang Nguyen
! since: 1.0.0.f
!
! <p>Convert the `input` of type int32 to an unsigned octal string
! as if the bits are unsigned bits.
!
! <p>This function returns an unsigned octal string of the `input`
! value.
!
! <p>The string that is returned by this function will always have
! a length of 11. The return string will never have leading zeroes.
! Values within the return string will always be right justified.
! Whitespaces will fill the left side of the return string if there
! is not enough values to fill the string.
! </p>
pure character(len=11) function int32ToOctalAsU(input) result(strOut)
implicit none
integer(k_int32), intent(in) :: input !! An int32 value.
integer(k_int32) :: v
integer(k_int32) :: si
strOut = " "
if ( input == 0 ) then
strOut(11:11) = charzero
return
end if
si = 11
strOut(si:si) = fndigits(IBITS(input, 0, 3))
v = ISHFT(input, -3)
do while( v /= 0 )
si = si - 1
strOut(si:si) = fndigits(IBITS(v, 0, 3))
si = si - 1
strOut(si:si) = fndigits(IBITS(v, 3, 3))
v = ISHFT(v, -6)
end do
if ( strOut(si:si) == charzero ) strOut(si:si) = charspace
end function int32ToOctalAsU
!| author: Khang Hoang Nguyen
! since: 1.0.0.f
!
! <p>Convert the `input` of type int32 to a signed octal string.
!
! <p>This function returns a signed octal string of the `input`
! value.
!
! <p>The string that is returned by this function will always have
! a length of 12. The return string will never have leading zeroes.
! Values within the return string will always be right justified.
! Whitespaces will fill the left side of the return string if there
! is not enough values to fill the string.
! </p>
pure character(len=12) function int32ToOctal(input) result(strOut)
implicit none
integer(k_int32), intent(in) :: input !! An int32 value.
integer(k_int32) :: v
integer(k_int32) :: si
strOut = " "
if ( input == 0 ) then
strOut(12:12) = charzero
return
else if ( input == int32_min ) then
strOut = "-20000000000"
return
end if
si = 12
if ( input < 0 ) then
v = not(input) + 1
strOut(si:si) = fndigits(IBITS(v, 0, 3))
v = ISHFT(v, -3)
else
strOut(si:si) = fndigits(IBITS(input, 0, 3))
v = ISHFT(input, -3)
end if
do while( v /= 0 )
si = si - 1
strOut(si:si) = fndigits(IBITS(v, 0, 3))
si = si - 1
strOut(si:si) = fndigits(IBITS(v, 3, 3))
v = ISHFT(v, -6)
end do
if ( strOut(si:si) == charzero ) then
strOut(si:si) = charspace
else
si = si - 1
end if
if ( input < 0 ) strOut(si:si) = charneg
end function int32ToOctal
!| author: Khang Hoang Nguyen
! since: 1.0.0.f
!
! <p>Convert the `input` of type int32 to an unsigned hexadecimal
! string as if the bits are unsigned bits.
!
! <p>This function returns an unsigned hexadecimal string of the
! `input` value.
!
! <p>The string that is returned by this function will always have
! a length of 8. The return string will never have leading zeroes.
! Values within the return string will always be right justified.
! Whitespaces will fill the left side of the return string if there
! is not enough values to fill the string.
! </p>
pure character(len=8) function int32ToHexAsU(input) result(strOut)
implicit none
integer(k_int32), intent(in) :: input !! An int32 value.
integer(k_int32) :: v
integer(k_int32) :: si
strOut = " "
if ( input == 0 ) then
strOut(8:8) = charzero
return
end if
v = input ; si = 9
do while( v /= 0 )
si = si - 1
strOut(si:si) = fndigits(IBITS(v, 0, 4))
si = si - 1
strOut(si:si) = fndigits(IBITS(v, 4, 4))
v = ISHFT(v, -8)
end do
if ( strOut(si:si) == charzero ) strOut(si:si) = charspace
end function int32ToHexAsU
!| author: Khang Hoang Nguyen
! since: 1.0.0.f
!
! <p>Convert the `input` of type int32 to a signed hexadecimal
! string.
!
! <p>This function returns a signed hexadecimal string of the
! `input` value.
!
! <p>The string that is returned by this function will always have
! a length of 9. The return string will never have leading zeroes.
! Values within the return string will always be right justified.
! Whitespaces will fill the left side of the return string if there
! is not enough values to fill the string.
! </p>
pure character(len=9) function int32ToHex(input) result(strOut)
implicit none
integer(k_int32), intent(in) :: input !! An int32 value.
integer(k_int32) :: v
integer(k_int32) :: si
strOut = " "
if ( input == 0 ) then
strOut(9:9) = charzero
return
else if ( input == int32_min ) then
strOut = "-80000000"
return
end if
if ( input < 0 ) then
v = not(input) + 1
else
v = input
end if
si = 10
do while( v /= 0 )
si = si - 1
strOut(si:si) = fndigits(IBITS(v, 0, 4))
si = si - 1
strOut(si:si) = fndigits(IBITS(v, 4, 4))
v = ISHFT(v, -8)
end do
if ( strOut(si:si) == charzero ) then
strOut(si:si) = charspace
else
si = si - 1
end if
if ( input < 0 ) strOut(si:si) = charneg
end function int32ToHex
end module fnInt32Util