DAMASK_EICMD/code/IO.f90

! Copyright 2011 Max-Planck-Institut für Eisenforschung GmbH
!
! This file is part of DAMASK,
! the Düsseldorf Advanced MAterial Simulation Kit.
!
! DAMASK is free software: you can redistribute it and/or modify
! it under the terms of the GNU General Public License as published by
! the Free Software Foundation, either version 3 of the License, or
! (at your option) any later version.
!
! DAMASK is distributed in the hope that it will be useful,
! but WITHOUT ANY WARRANTY; without even the implied warranty of
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! GNU General Public License for more details.
!
! You should have received a copy of the GNU General Public License
! along with DAMASK. If not, see <http://www.gnu.org/licenses/>.
!
!##############################################################
!* $Id$
!##############################################################
 MODULE IO   
!##############################################################
 
 CONTAINS
!---------------------------
! function IO_abaqus_assembleInputFile
! function IO_open_file(unit,relPath)
! function IO_open_inputFile(unit, model)
! function IO_open_logFile(unit)
! function IO_hybridIA(Nast,ODFfileName)
! private function hybridIA_reps(dV_V,steps,C)
! function IO_stringPos(line,maxN)
! function IO_stringValue(line,positions,pos)
! function IO_floatValue(line,positions,pos)
! function IO_intValue(line,positions,pos)
! function IO_fixedStringValue(line,ends,pos)
! function IO_fixedFloatValue(line,ends,pos)
! function IO_fixedFloatNoEValue(line,ends,pos)
! function IO_fixedIntValue(line,ends,pos)
! function IO_continousIntValues(unit,maxN)
! function IO_lc(line)
! subroutine IO_lcInplace(line)
! subroutine IO_error(ID)
! subroutine IO_warning(ID)
!---------------------------

!********************************************************************
! output version number
!********************************************************************
subroutine IO_init ()

use, intrinsic :: iso_fortran_env
  !$OMP CRITICAL (write2out)
  write(6,*)
  write(6,*) '<<<+-  IO init  -+>>>'
  write(6,*) '$Id$'
#include "compilation_info.f90"
  call flush(6)
  !$OMP END CRITICAL (write2out)
 
endsubroutine



!********************************************************************
! AP: 12.07.10
!    create a new input file for abaqus simulations
!    by removing all comment lines and including "include"s
!********************************************************************
recursive function IO_abaqus_assembleInputFile(unit1,unit2) result(createSuccess)
 use prec
 use DAMASK_interface
 implicit none
 
 character(len=300) line,fname
 integer(pInt), intent(in) :: unit1, unit2
 logical createSuccess,fexist
 integer(pInt), parameter :: maxNchunks = 6
 integer(pInt), dimension(1+2*maxNchunks) :: positions

 
 do
   read(unit2,'(A300)',END=220) line
!   line = IO_lc(trim(line))
!  do not change the whole line to lower case, file names in Linux are case sensitive!
   positions = IO_stringPos(line,maxNchunks)

!   call IO_lcInPlace(line)
   if (IO_lc(IO_StringValue(line,positions,1_pInt))=='*include') then
     fname = trim(getSolverWorkingDirectoryName())//trim(line(9_pInt+scan(line(9_pInt:),'='):))
     inquire(file=fname, exist=fexist)
     if (.not.(fexist)) then
       !$OMP CRITICAL (write2out)
         write(6,*)'ERROR: file does not exist error in IO_abaqus_assembleInputFile'
         write(6,*)'filename: ', trim(fname)
       !$OMP END CRITICAL (write2out)
       createSuccess = .false.
       return
     endif
     open(unit2+1,err=200,status='old',file=fname)
     if (IO_abaqus_assembleInputFile(unit1,unit2+1_pInt)) then
       createSuccess=.true.
       close(unit2+1)
     else
       createSuccess=.false.
       return
     endif
   else if (line(1:2) /= '**') then 
     write(unit1,'(A)') trim(line)
   endif
 enddo
 
220 createSuccess = .true.
 return
 
200 createSuccess =.false.

end function

!***********************************************************
! check if the input file for Abaqus contains part info
!***********************************************************
 function IO_abaqus_hasNoPart(unit)
 
 use prec, only: pInt
 implicit none
 
 integer(pInt) unit
 integer(pInt), parameter :: maxNchunks = 1
 integer(pInt), dimension(1+2*maxNchunks) :: pos
 logical IO_abaqus_hasNoPart
 character(len=300) line
 
 IO_abaqus_hasNoPart = .true.
 
610 FORMAT(A300)
 rewind(unit)
 do
   read(unit,610,END=620) line
   pos = IO_stringPos(line,maxNchunks)
   if (IO_lc(IO_stringValue(line,pos,1_pInt)) == '*part' ) then
     IO_abaqus_hasNoPart = .false.
     exit
   endif
 enddo
 
620 endfunction



!********************************************************************
! open existing file to given unit
! path to file is relative to working directory
!********************************************************************
 logical function IO_open_file(unit,relPath)

 use prec, only: pInt
 use DAMASK_interface
 
 implicit none
 character(len=*) relPath
 integer(pInt) unit

 IO_open_file = .false.
 
 open(unit,status='old',err=100,file=trim(getSolverWorkingDirectoryName())//relPath)
 IO_open_file = .true.
 
100 endfunction


!********************************************************************
! open FEM inputfile to given unit
! AP: 12.07.10 
!   : changed the function to open *.inp_assembly, which is basically 
!     the input file without comment lines and possibly assembled includes
!********************************************************************
 logical function IO_open_inputFile(unit,model)

 use prec, only: pReal, pInt
 use DAMASK_interface
 implicit none

 integer(pInt), intent(in) :: unit
 character(len=*) model

 IO_open_inputFile = .false.
 
 if (FEsolver == 'Abaqus') then
   open(unit+1,status='old',err=100,&
               file=trim(getSolverWorkingDirectoryName())//&
                    trim(model)//InputFileExtension)
   open(unit,err=100,file=trim(getSolverWorkingDirectoryName())//&
                          trim(model)//InputFileExtension//'_assembly')
   IO_open_inputFile = IO_abaqus_assembleInputFile(unit,unit+1_pInt)          ! strip comments and concatenate any "include"s
   close(unit+1_pInt) 
 else
   open(unit,status='old',err=100,file=trim(getSolverWorkingDirectoryName())//&
                                       trim(model)//InputFileExtension)
   IO_open_inputFile = .true.
 endif

100 endfunction


!********************************************************************
! open FEM logfile to given unit
!********************************************************************
 logical function IO_open_logFile(unit)

 use prec, only: pReal, pInt
 use DAMASK_interface
 implicit none

 integer(pInt), intent(in) :: unit

 IO_open_logFile = .false.
 
 open(unit,status='old',err=100,file=trim(getSolverWorkingDirectoryName())//&
                                     trim(getSolverJobName())//LogFileExtension)
 IO_open_logFile = .true.

100 endfunction


!********************************************************************
! open (write) file related to current job
! but with different extension to given unit
!********************************************************************
 logical function IO_open_jobFile(unit,newExt)

 use prec, only: pReal, pInt
 use DAMASK_interface
 implicit none

 integer(pInt), intent(in) :: unit
 character(*), intent(in) :: newExt

 IO_open_jobFile = .false.
 
 open(unit,status='old',err=100,file=trim(getSolverWorkingDirectoryName())//&
                                     trim(getSolverJobName())//'.'//newExt)
 IO_open_jobFile = .true.
 
100 endfunction


!********************************************************************
! open (write) file related to current job
! but with different extension to given unit
!********************************************************************
 logical function IO_write_jobFile(unit,newExt)

 use prec, only: pReal, pInt
 use DAMASK_interface
 implicit none

 integer(pInt), intent(in) :: unit
 character(*), intent(in) :: newExt

 IO_write_jobFile = .false.
 
 open(unit,status='replace',err=100,file=trim(getSolverWorkingDirectoryName())//&
                                         trim(getSolverJobName())//'.'//newExt)
 IO_write_jobFile = .true.
 
100 endfunction


!********************************************************************
! open (write) binary file related to current job
! but with different extension to given unit
!********************************************************************
 logical function IO_write_jobBinaryFile(unit,newExt,recMultiplier)

 use prec, only: pReal, pInt
 use DAMASK_interface
 implicit none

 integer(pInt), intent(in) :: unit
 integer(pInt), intent(in), optional :: recMultiplier
 character(*), intent(in) :: newExt

 IO_write_jobBinaryFile = .false.
 if (present(recMultiplier)) then
   open(unit,status='replace',form='unformatted',access='direct',recl=pReal*recMultiplier, &
             err=100,file=trim(getSolverWorkingDirectoryName())//&
                                       trim(getSolverJobName())//'.'//newExt)
  else
   open(unit,status='replace',form='unformatted',access='direct',recl=pReal, &
             err=100,file=trim(getSolverWorkingDirectoryName())//&
                                       trim(getSolverJobName())//'.'//newExt)
 endif
 IO_write_jobBinaryFile = .true.
 
100 endfunction


!********************************************************************
! open (read) binary file related to restored job
! and with different extension to given unit
!********************************************************************
 logical function IO_read_jobBinaryFile(unit,newExt,jobName,recMultiplier)

 use prec, only: pReal, pInt
 use DAMASK_interface
 implicit none

 integer(pInt), intent(in) :: unit
 integer(pInt), intent(in), optional :: recMultiplier
 character(*), intent(in) :: newExt, jobName

 IO_read_jobBinaryFile = .false.
 if (present(recMultiplier)) then
   open(unit,status='old',form='unformatted',access='direct',recl=pReal*recMultiplier, &
             err=100,file=trim(getSolverWorkingDirectoryName())//&
                                                  trim(jobName)//'.'//newExt)
  else
   open(unit,status='old',form='unformatted',access='direct',recl=pReal, &
             err=100,file=trim(getSolverWorkingDirectoryName())//&
                                                  trim(jobName)//'.'//newExt)
 endif
 IO_read_jobBinaryFile = .true.
 
100 endfunction


!********************************************************************
! hybrid IA repetition counter
!********************************************************************
 function hybridIA_reps(dV_V,steps,C)

 use prec, only: pReal, pInt
 implicit none
 
 integer(pInt), intent(in), dimension(3) :: steps
 integer(pInt) hybridIA_reps, phi1,Phi,phi2
 real(pReal), intent(in), dimension(steps(3),steps(2),steps(1)) :: dV_V
 real(pReal), intent(in) :: C
 
 hybridIA_reps = 0_pInt
 do phi1=1,steps(1)
   do Phi =1,steps(2)
     do phi2=1,steps(3)
       hybridIA_reps = hybridIA_reps+nint(C*dV_V(phi2,Phi,phi1), pInt)
     enddo
   enddo
 enddo
 
 endfunction


!********************************************************************
! hybrid IA sampling of ODFfile
!********************************************************************
 function IO_hybridIA(Nast,ODFfileName)

 use prec, only: pReal, pInt
 implicit none
 
 real(pReal), parameter :: pi = 3.14159265358979323846264338327950288419716939937510_pReal
 real(pReal), parameter :: inRad = pi/180.0_pReal

 character(len=*) ODFfileName
 character(len=80) line
 character(len=*), parameter :: fileFormat = '(A80)'
 integer(pInt) i,j,bin,Nast,NnonZero,Nset,Nreps,reps,phi1,Phi,phi2
 integer(pInt), dimension(7) :: pos
 integer(pInt), dimension(3) :: steps
 integer(pInt), dimension(:), allocatable :: binSet
 real(pReal) center,sum_dV_V,prob,dg_0,C,lowerC,upperC,rnd
 real(pReal), dimension(3) :: limits,deltas
 real(pReal), dimension(:,:,:), allocatable :: dV_V
 real(pReal), dimension(3,Nast) :: IO_hybridIA

 if (.not. IO_open_file(999_pInt,ODFfileName)) goto 100
 
!--- parse header of ODF file ---
!--- limits in phi1, Phi, phi2 ---
 read(999,fmt=fileFormat,end=100) line
 pos = IO_stringPos(line,3_pInt)
 if (pos(1).ne.3) goto 100
 do i=1,3
   limits(i) = IO_floatValue(line,pos,i)*inRad
 enddo

!--- deltas in phi1, Phi, phi2 ---
 read(999,fmt=fileFormat,end=100) line
 pos = IO_stringPos(line,3_pInt)
 if (pos(1).ne.3) goto 100
 do i=1,3
   deltas(i) = IO_floatValue(line,pos,i)*inRad
 enddo
 steps = nint(limits/deltas,pInt)
 allocate(dV_V(steps(3),steps(2),steps(1)))

!--- box boundary/center at origin? ---
 read(999,fmt=fileFormat,end=100) line
 if (index(IO_lc(line),'bound')>0) then
   center = 0.5_pReal
 else
   center = 0.0_pReal
 endif
 
!--- skip blank line ---
 read(999,fmt=fileFormat,end=100) line

 sum_dV_V = 0.0_pReal
 dV_V = 0.0_pReal
 dg_0 = deltas(1)*deltas(3)*2.0_pReal*sin(deltas(2)/2.0_pReal)
 NnonZero = 0_pInt
 
 do phi1=1,steps(1)
   do Phi=1,steps(2)
     do phi2=1,steps(3)
       read(999,fmt=*,end=100) prob
       if (prob > 0.0_pReal) then
         NnonZero = NnonZero+1
         sum_dV_V = sum_dV_V+prob
       else
         prob = 0.0_pReal
       endif
       dV_V(phi2,Phi,phi1) = prob*dg_0*sin((Phi-1.0_pReal+center)*deltas(2))
     enddo
   enddo
 enddo  

 dV_V = dV_V/sum_dV_V  ! normalize to 1
 
!--- now fix bounds ---
 Nset = max(Nast,NnonZero)                             ! if less than non-zero voxel count requested, sample at least that much
 lowerC = 0.0_pReal
 upperC = real(Nset, pReal)
 
 do while (hybridIA_reps(dV_V,steps,upperC) < Nset)
   lowerC = upperC
   upperC = upperC*2.0_pReal
 enddo
!--- binary search for best C ---
 do
   C = (upperC+lowerC)/2.0_pReal
   Nreps = hybridIA_reps(dV_V,steps,C)
   if (abs(upperC-lowerC) < upperC*1.0e-14_pReal) then
     C = upperC
     Nreps = hybridIA_reps(dV_V,steps,C)
     exit
   elseif (Nreps < Nset) then
     lowerC = C
   elseif (Nreps > Nset) then
     upperC = C
   else
     exit
   endif
 enddo

 allocate(binSet(Nreps))
 bin = 0_pInt ! bin counter
 i = 1 ! set counter
 do phi1=1,steps(1)
   do Phi=1,steps(2)
     do phi2=1,steps(3)
       reps = nint(C*dV_V(phi2,Phi,phi1), pInt)
       binSet(i:i+reps-1) = bin
       bin = bin+1 ! advance bin
       i = i+reps ! advance set
     enddo
   enddo
 enddo

 do i=1,Nast
   if (i < Nast) then
     call random_number(rnd)
     j = nint(rnd*(Nreps-i)+i+0.5_pReal,pInt)
   else
     j = i
   endif
   bin = binSet(j)
   IO_hybridIA(1,i) = deltas(1)*(real(mod(bin/(steps(3)*steps(2)),steps(1)),pReal)+center)  ! phi1
   IO_hybridIA(2,i) = deltas(2)*(real(mod(bin/ steps(3)          ,steps(2)),pReal)+center)  ! Phi
   IO_hybridIA(3,i) = deltas(3)*(real(mod(bin                    ,steps(3)),pReal)+center)  ! phi2
   binSet(j) = binSet(i)
 enddo
 close(999)
 return

! on error
100 IO_hybridIA = -1.0_pReal
 close(999)
 
 endfunction 


!********************************************************************
! identifies lines without content
!********************************************************************
 pure function IO_isBlank (line)

 use prec, only: pInt
 implicit none

 character(len=*), intent(in) :: line
 character(len=*), parameter :: blank = achar(32)//achar(9)//achar(10)//achar(13) ! whitespaces
 character(len=*), parameter :: comment = achar(35)                               ! comment id '#'
 integer(pInt) posNonBlank, posComment
 logical IO_isBlank
 
 posNonBlank = verify(line,blank)
 posComment  = scan(line,comment)
 IO_isBlank = posNonBlank == 0 .or. posNonBlank == posComment
 
 endfunction

!********************************************************************
! get tagged content of line
!********************************************************************
 pure function IO_getTag (line,openChar,closeChar)

 use prec, only: pInt
 implicit none

 character(len=*), intent(in) :: line,openChar,closeChar
 character(len=*), parameter :: sep=achar(32)//achar(9)//achar(10)//achar(13) ! whitespaces
 character(len=len_trim(line)) IO_getTag
 integer(pInt)  left,right

 IO_getTag = ''
 left = scan(line,openChar)
 right = scan(line,closeChar)
 
 if (left == verify(line,sep) .and. right > left) & ! openChar is first and closeChar occurs
   IO_getTag = line(left+1:right-1)

 endfunction


!*********************************************************************
 function IO_countSections(file,part)
!*********************************************************************
 use prec, only: pInt
 implicit none

!* Definition of variables
 integer(pInt), intent(in) :: file
 character(len=*), intent(in) :: part
 integer(pInt) IO_countSections
 character(len=1024) line

 IO_countSections = 0
 line = ''
 rewind(file)

 do while (IO_getTag(line,'<','>') /= part)      ! search for part
   read(file,'(a1024)',END=100) line
 enddo

 do
   read(file,'(a1024)',END=100) line
   if (IO_isBlank(line)) cycle                            ! skip empty lines
   if (IO_getTag(line,'<','>') /= '') exit                ! stop at next part
   if (IO_getTag(line,'[',']') /= '') &                   ! found [section] identifier
     IO_countSections = IO_countSections + 1
 enddo

100 endfunction
 

!*********************************************************************
! return array of myTag counts within <part> for at most N[sections]
!*********************************************************************
 function IO_countTagInPart(file,part,myTag,Nsections)

 use prec, only: pInt
 implicit none

!* Definition of variables
 integer(pInt), intent(in) :: file, Nsections
 character(len=*), intent(in) :: part, myTag
 integer(pInt), dimension(Nsections) :: IO_countTagInPart, counter
 integer(pInt), parameter :: maxNchunks = 1
 integer(pInt), dimension(1+2*maxNchunks) :: positions
 integer(pInt) section
 character(len=1024) line,tag

 counter = 0_pInt
 section = 0_pInt
 line = ''
 rewind(file)

 do while (IO_getTag(line,'<','>') /= part)               ! search for part
   read(file,'(a1024)',END=100) line
 enddo

 do
   read(file,'(a1024)',END=100) line
   if (IO_isBlank(line)) cycle                            ! skip empty lines
   if (IO_getTag(line,'<','>') /= '') exit                ! stop at next part
   if (IO_getTag(line,'[',']') /= '') &                   ! found [section] identifier
     section = section + 1
   if (section > 0) then
     positions = IO_stringPos(line,maxNchunks)
     tag = IO_lc(IO_stringValue(line,positions,1_pInt))        ! extract key
     if (tag == myTag) &                                  ! match
       counter(section) = counter(section) + 1_pInt
   endif   
 enddo

100 IO_countTagInPart = counter

endfunction


!*********************************************************************
! return array of myTag presence within <part> for at most N[sections]
!*********************************************************************
 function IO_spotTagInPart(file,part,myTag,Nsections)

 use prec, only: pInt
 implicit none

!* Definition of variables
 integer(pInt), intent(in) :: file, Nsections
 character(len=*), intent(in) :: part, myTag
 logical, dimension(Nsections) :: IO_spotTagInPart
 integer(pInt), parameter :: maxNchunks = 1
 integer(pInt), dimension(1+2*maxNchunks) :: positions
 integer(pInt) section
 character(len=1024) line,tag

 IO_spotTagInPart = .false.                               ! assume to nowhere spot tag
 section = 0_pInt
 line = ''
 rewind(file)

 do while (IO_getTag(line,'<','>') /= part)               ! search for part
   read(file,'(a1024)',END=100) line
 enddo

 do
   read(file,'(a1024)',END=100) line
   if (IO_isBlank(line)) cycle                            ! skip empty lines
   if (IO_getTag(line,'<','>') /= '') exit                ! stop at next part
   if (IO_getTag(line,'[',']') /= '') &                   ! found [section] identifier
     section = section + 1
   if (section > 0) then
     positions = IO_stringPos(line,maxNchunks)
     tag = IO_lc(IO_stringValue(line,positions,1_pInt))        ! extract key
     if (tag == myTag) &                                  ! match
       IO_spotTagInPart(section) = .true.
   endif   
 enddo

100 endfunction

!********************************************************************
! locate at most N space-separated parts in line
! return array containing number of parts in line and
! the left/right positions of at most N to be used by IO_xxxVal
!********************************************************************
! pure function IO_stringPos (line,N)
 function IO_stringPos (line,N)

 use prec, only: pReal,pInt
 implicit none

 character(len=*), intent(in) :: line
 character(len=*), parameter :: sep=achar(44)//achar(32)//achar(9)//achar(10)//achar(13) ! comma and whitespaces
 integer(pInt), intent(in) :: N
 integer(pInt)  left,right
 integer(pInt) IO_stringPos(1+N*2)

 IO_stringPos = -1
 IO_stringPos(1) = 0
 right = 0

 do while (verify(line(right+1:),sep)>0)
   left  = right + verify(line(right+1:),sep)
   right = left + scan(line(left:),sep) - 2
   if ( line(left:left) == '#' ) then
     exit
   endif
   if ( IO_stringPos(1)<N ) then
     IO_stringPos(1+IO_stringPos(1)*2+1) = left
     IO_stringPos(1+IO_stringPos(1)*2+2) = right
   endif
   IO_stringPos(1) = IO_stringPos(1)+1
 enddo

endfunction


!********************************************************************
! read string value at pos from line
!********************************************************************
 pure function IO_stringValue (line,positions,pos)
 
 use prec, only: pReal,pInt
 implicit none
 
 character(len=*), intent(in) :: line
 integer(pInt), intent(in) :: positions(*),pos
 character(len=1+positions(pos*2+1)-positions(pos*2)) IO_stringValue

 if (positions(1) < pos) then
   IO_stringValue = ''
 else
   IO_stringValue = line(positions(pos*2):positions(pos*2+1))
 endif

 endfunction


!********************************************************************
! read string value at pos from fixed format line
!********************************************************************
 pure function IO_fixedStringValue (line,ends,pos)
 
 use prec, only: pReal,pInt
 implicit none
 
 character(len=*), intent(in) :: line
 integer(pInt), intent(in) :: ends(*),pos
 character(len=ends(pos+1)-ends(pos)) IO_fixedStringValue

 IO_fixedStringValue = line(ends(pos)+1:ends(pos+1))

 endfunction


!********************************************************************
! read float value at pos from line
!********************************************************************
 pure function IO_floatValue (line,positions,myPos)
 
 use prec, only: pReal,pInt
 implicit none
 
 character(len=*), intent(in) :: line
 integer(pInt), intent(in) :: positions(*),myPos
 real(pReal) IO_floatValue

 if (positions(1) < myPos) then
   IO_floatValue = 0.0_pReal
 else
   read(UNIT=line(positions(myPos*2):positions(myPos*2+1)),ERR=100,FMT=*) IO_floatValue
 endif
 return
100 IO_floatValue = huge(1.0_pReal)

 endfunction


!********************************************************************
! read float value at pos from fixed format line
!********************************************************************
 pure function IO_fixedFloatValue (line,ends,pos)
 
 use prec, only: pReal,pInt
 implicit none
 
 character(len=*), intent(in) :: line
 integer(pInt), intent(in) :: ends(*),pos
 real(pReal) IO_fixedFloatValue

 read(UNIT=line(ends(pos-1)+1:ends(pos)),ERR=100,FMT=*) IO_fixedFloatValue
 return
100 IO_fixedFloatValue = huge(1.0_pReal)

 endfunction


!********************************************************************
! read float x.y+z value at pos from format line line
!********************************************************************
 pure function IO_fixedNoEFloatValue (line,ends,pos)
 
 use prec, only: pReal,pInt
 implicit none
 
 character(len=*), intent(in) :: line
 integer(pInt), intent(in) :: ends(*),pos
 integer(pInt) pos_exp,expon
 real(pReal) IO_fixedNoEFloatValue,base
 
 pos_exp = scan(line(ends(pos)+1:ends(pos+1)),'+-',back=.true.)
 if (pos_exp > 1) then
   read(UNIT=line(ends(pos)+1:ends(pos)+pos_exp-1),ERR=100,FMT=*) base
   read(UNIT=line(ends(pos)+pos_exp:ends(pos+1)),ERR=100,FMT=*) expon
 else
   read(UNIT=line(ends(pos)+1:ends(pos+1)),ERR=100,FMT=*) base
   expon = 0_pInt
 endif
 IO_fixedNoEFloatValue = base*10.0_pReal**expon
 return
100 IO_fixedNoEFloatValue = huge(1.0_pReal)

 endfunction


!********************************************************************
! read int value at pos from line
!********************************************************************
 pure function IO_intValue (line,positions,pos)
 
 use prec, only: pReal,pInt
 implicit none
 
 character(len=*), intent(in) :: line
 integer(pInt), intent(in) :: positions(*),pos
 integer(pInt) IO_intValue

 if (positions(1) < pos) then
   IO_intValue = 0_pInt
 else
   read(UNIT=line(positions(pos*2):positions(pos*2+1)),ERR=100,FMT=*) IO_intValue
 endif
 return
100 IO_intValue = huge(1_pInt)

 endfunction


!********************************************************************
! read int value at pos from fixed format line
!********************************************************************
 pure function IO_fixedIntValue (line,ends,pos)
 
 use prec, only: pReal,pInt
 implicit none
 
 character(len=*), intent(in) :: line
 integer(pInt), intent(in) :: ends(*),pos
 integer(pInt) IO_fixedIntValue

 read(UNIT=line(ends(pos)+1:ends(pos+1)),ERR=100,FMT=*) IO_fixedIntValue
 return
100 IO_fixedIntValue = huge(1_pInt)

 endfunction


!********************************************************************
! change character in line to lower case
!********************************************************************
 pure function IO_lc (line)

 use prec, only: pInt
 implicit none

 character (len=*), intent(in) :: line
 character (len=len(line)) IO_lc
 integer(pInt) i

 IO_lc = line
 do i=1,len(line)
    if(64<iachar(line(i:i)) .and. iachar(line(i:i))<91) IO_lc(i:i)=achar(iachar(line(i:i))+32)
 enddo

 endfunction


!********************************************************************
! in place change of character in line to lower case
!********************************************************************
 subroutine IO_lcInplace (line)

 use prec, only: pInt
 implicit none

 character (len=*) line
 character (len=len(line)) IO_lc
 integer(pInt) i

 IO_lc = line
 do i=1,len(line)
    if(64<iachar(line(i:i)) .and. iachar(line(i:i))<91) IO_lc(i:i)=achar(iachar(line(i:i))+32)
 enddo
 line = IO_lc

 endsubroutine


!********************************************************************
! read on in file to skip (at least) N chunks (may be over multiple lines)
!********************************************************************
 subroutine IO_skipChunks (unit,N)

 use prec, only: pReal,pInt
 implicit none

 integer(pInt)  remainingChunks,unit,N
 integer(pInt), parameter :: maxNchunks = 64
 integer(pInt), dimension(1+2*maxNchunks) :: pos
 character(len=300) line

 remainingChunks = N
 do while (remainingChunks > 0)
   read(unit,'(A300)',end=100) line
   pos = IO_stringPos(line,maxNchunks)
   remainingChunks = remainingChunks - pos(1)
 enddo
100  endsubroutine


!********************************************************************
! extract value from key=value pair and check whether key matches
!********************************************************************
 pure function IO_extractValue (line,key)
 
 use prec, only: pReal,pInt
 implicit none

 character(len=*), intent(in) :: line,key
 character(len=*), parameter :: sep = achar(61)         ! '='
 integer(pInt) pos
 character(len=300) IO_extractValue

 IO_extractValue = ''

 pos = scan(line,sep)
 if (pos > 0 .and. line(:pos-1) == key(:pos-1)) &       ! key matches expected key
   IO_extractValue = line(pos+1:)                       ! extract value

 endfunction


!********************************************************************
! count lines containig data up to next *keyword
! AP: changed the function to neglect comment lines between keyword definitions.
!   : is not changed back to the original version since *.inp_assembly does not
!   : contain any comment lines (12.07.2010)
!********************************************************************
 function IO_countDataLines (unit)

 use prec, only: pReal,pInt
 implicit none

 integer(pInt)  IO_countDataLines,unit
 integer(pInt), parameter :: maxNchunks = 1
 integer(pInt), dimension(1+2*maxNchunks) :: pos
 character(len=300) line,tmp

 IO_countDataLines = 0
 do
   read(unit,'(A300)',end=100) line
   pos = IO_stringPos(line,maxNchunks)
   tmp = IO_lc(IO_stringValue(line,pos,1_pInt))
   if (tmp(1:1) == '*' .and. tmp(2:2) /= '*') then  ! found keyword
     exit
   else
     if (tmp(2:2) /= '*') IO_countDataLines = IO_countDataLines + 1_pInt
   endif
 enddo
100 backspace(unit)

 endfunction

 
!********************************************************************
! count items in consecutive lines
! Marc:   ints concatenated by "c" as last char or range of values a "to" b
! Abaqus: triplet of start,stop,inc
!********************************************************************
 function IO_countContinousIntValues (unit)

 use DAMASK_interface
 use prec, only: pReal,pInt
 implicit none

 integer(pInt)  unit,l,count
 integer(pInt)  IO_countContinousIntValues
 integer(pInt), parameter :: maxNchunks = 8192
 integer(pInt), dimension(1+2*maxNchunks) :: pos
 character(len=65536) line

 IO_countContinousIntValues = 0_pInt

 select case (FEsolver)
   case ('Marc','Spectral')
   
     do
       read(unit,'(A300)',end=100) line
       pos = IO_stringPos(line,maxNchunks)
       if (IO_lc(IO_stringValue(line,pos,2_pInt)) == 'to' ) then               ! found range indicator
         IO_countContinousIntValues = 1_pInt + IO_intValue(line,pos,3_pInt) - IO_intValue(line,pos,1_pInt)
         exit                                                             ! only one single range indicator allowed
       else
         IO_countContinousIntValues = IO_countContinousIntValues+pos(1)-1_pInt ! add line's count when assuming 'c'
         if ( IO_lc(IO_stringValue(line,pos,pos(1))) /= 'c' ) then        ! line finished, read last value
           IO_countContinousIntValues = IO_countContinousIntValues+1
           exit                                                           ! data ended
         endif
       endif
     enddo
   
   case('Abaqus')

     count = IO_countDataLines(unit)
     do l = 1,count
       backspace(unit)
     enddo
     
     do l = 1,count
       read(unit,'(A300)',end=100) line
       pos = IO_stringPos(line,maxNchunks)
       IO_countContinousIntValues = IO_countContinousIntValues + 1 + &    ! assuming range generation
                                    (IO_intValue(line,pos,2_pInt)-IO_intValue(line,pos,1_pInt))/&
                                                         max(1_pInt,IO_intValue(line,pos,3_pInt))
     enddo
 
 endselect

100  endfunction


!********************************************************************
! return integer list corrsponding to items in consecutive lines
! Marc:   ints concatenated by "c" as last char, range of a "to" b, or named set
! Abaqus: triplet of start,stop,inc or named set
!********************************************************************
 function IO_continousIntValues (unit,maxN,lookupName,lookupMap,lookupMaxN)

 use DAMASK_interface
 use prec, only: pReal,pInt
 implicit none

 integer(pInt)  unit,maxN,i,j,l,count,first,last
 integer(pInt), dimension(1+maxN) :: IO_continousIntValues
 integer(pInt), parameter :: maxNchunks = 8192_pInt
 integer(pInt), dimension(1+2*maxNchunks) :: pos
 character(len=64), dimension(:) :: lookupName
 integer(pInt) :: lookupMaxN
 integer(pInt), dimension(:,:) :: lookupMap
 character(len=65536) line
 logical rangeGeneration

 IO_continousIntValues = 0
 rangeGeneration = .false.

 select case (FEsolver)
   case ('Marc','Spectral')
   
     do
       read(unit,'(A65536)',end=100) line
       pos = IO_stringPos(line,maxNchunks)
       if (verify(IO_stringValue(line,pos,1_pInt),'0123456789') > 0) then     ! a non-int, i.e. set name
         do i = 1_pInt,lookupMaxN                                             ! loop over known set names
           if (IO_stringValue(line,pos,1_pInt) == lookupName(i)) then         ! found matching name
             IO_continousIntValues = lookupMap(:,i)                      ! return resp. entity list
             exit
           endif
         enddo
         exit
       else if (pos(1) > 2_pInt .and. IO_lc(IO_stringValue(line,pos,2_pInt)) == 'to' ) then         ! found range indicator
         do i = IO_intValue(line,pos,1_pInt),IO_intValue(line,pos,3_pInt)
           IO_continousIntValues(1) = IO_continousIntValues(1) + 1_pInt
           IO_continousIntValues(1+IO_continousIntValues(1)) = i
         enddo
         exit
       else
         do i = 1,pos(1)-1  ! interpret up to second to last value
           IO_continousIntValues(1) = IO_continousIntValues(1) + 1_pInt
           IO_continousIntValues(1+IO_continousIntValues(1)) = IO_intValue(line,pos,i)
         enddo
         if ( IO_lc(IO_stringValue(line,pos,pos(1))) /= 'c' ) then       ! line finished, read last value
           IO_continousIntValues(1) = IO_continousIntValues(1) + 1_pInt
           IO_continousIntValues(1+IO_continousIntValues(1)) = IO_intValue(line,pos,pos(1))
           exit
         endif
       endif
     enddo
   
   case('Abaqus')

     count = IO_countDataLines(unit)
     do l = 1,count
       backspace(unit)
     enddo
     
!      check if the element values in the elset are auto generated
     backspace(unit)
     read(unit,'(A65536)',end=100) line
     pos = IO_stringPos(line,maxNchunks)
     do i = 1,pos(1)
       if (IO_lc(IO_stringValue(line,pos,i)) == 'generate') rangeGeneration = .true.
     enddo
     
     do l = 1,count
       read(unit,'(A65536)',end=100) line
       pos = IO_stringPos(line,maxNchunks)
       if (verify(IO_stringValue(line,pos,1_pInt),'0123456789') > 0_pInt) then     ! a non-int, i.e. set names follow on this line
         do i = 1,pos(1)                                                 ! loop over set names in line
           do j = 1,lookupMaxN                                           ! look thru known set names
             if (IO_stringValue(line,pos,i) == lookupName(j)) then       ! found matching name
               first = 2 + IO_continousIntValues(1)                      ! where to start appending data
               last  = first + lookupMap(1,j) - 1                        ! up to where to append data
               IO_continousIntValues(first:last) = lookupMap(2:1+lookupMap(1,j),j)    ! add resp. entity list
               IO_continousIntValues(1) = IO_continousIntValues(1) + lookupMap(1,j)   ! count them
             endif
           enddo
         enddo
       else if (rangeGeneration) then                                    ! range generation
         do i = IO_intValue(line,pos,1_pInt),IO_intValue(line,pos,2_pInt),max(1_pInt,IO_intValue(line,pos,3_pInt))
           IO_continousIntValues(1) = IO_continousIntValues(1) + 1
           IO_continousIntValues(1+IO_continousIntValues(1)) = i
         enddo
       else                                                              ! read individual elem nums
         do i = 1,pos(1)
!            write(*,*)'IO_CIV-int',IO_intValue(line,pos,i)
           IO_continousIntValues(1) = IO_continousIntValues(1) + 1
           IO_continousIntValues(1+IO_continousIntValues(1)) = IO_intValue(line,pos,i)
         enddo
       endif
     enddo
 
 endselect

100 endfunction



!********************************************************************
! write error statements to standard out
! and terminate the Marc run with exit #9xxx
! in ABAQUS either time step is reduced or execution terminated
!********************************************************************
 subroutine IO_error(error_ID,e,i,g,ext_msg)

 use prec, only: pInt
 implicit none

 integer(pInt), intent(in) :: error_ID
 integer(pInt), optional, intent(in) :: e,i,g
 character(len=*), optional, intent(in) :: ext_msg
 character(len=1024) msg

 select case (error_ID)
 case (30_pInt)
   msg = 'could not open spectral loadcase'
 case (31_pInt)
   msg = 'mask consistency violated in spectral loadcase'
 case (32_pInt)
   msg = 'ill-defined L (each line should be either fully or not at all defined) in spectral loadcase'
 case (34_pInt)
   msg = 'negative time increment in spectral loadcase'
 case (35_pInt)
   msg = 'non-positive increments in spectral loadcase'
 case (36_pInt)
   msg = 'non-positive result frequency in spectral loadcase'
 case (37_pInt)
   msg = 'incomplete loadcase'
 case (38_pInt)
   msg = 'mixed boundary conditions allow rotation'
 case (39_pInt)
   msg = 'non-positive restart frequency in spectral loadcase'
 case (40_pInt)
   msg = 'path rectification error'
 case (41_pInt)
   msg = 'path too long'
 case (42_pInt)
   msg = 'missing header info in spectral mesh'
 case (43_pInt)
   msg = 'resolution in spectral mesh'
 case (44_pInt)
   msg = 'dimension in spectral mesh'
 case (45_pInt)
   msg = 'incomplete information in spectral mesh header'
 case (46_pInt)
   msg = 'not a rotation defined for loadcase rotation'
 case (47_pInt)
   msg = 'updating of gamma operator not possible if it is pre calculated'
 case (50_pInt)
   msg = 'writing constitutive output description'
 case (100_pInt)
   msg = 'opening material configuration'
 case (101_pInt)
   msg = 'opening input file'
 case (102_pInt)
   msg = 'non-positive dimension'
 case (103_pInt)
   msg = 'odd resolution given'
 case (105_pInt)
   msg = 'reading from ODF file'
 case (106_pInt)
   msg = 'reading info on old job'
 case (107_pInt)
   msg = 'writing spectralOut file'
 case (108_pInt)
   msg = 'precistion not suitable for FFTW'
 case (109_pInt)
   msg = 'initializing FFTW'
 case (110_pInt)
   msg = 'no homogenization specified via State Variable 2'
 case (120_pInt)
   msg = 'no microstructure specified via State Variable 3'
 case (125_pInt)
   msg = 'no entries in config part'
 case (130_pInt)
   msg = 'homogenization index out of bounds'
 case (140_pInt)
   msg = 'microstructure index out of bounds'
 case (150_pInt)
   msg = 'crystallite index out of bounds'
 case (155_pInt)
   msg = 'phase index out of bounds'
 case (160_pInt)
   msg = 'texture index out of bounds'
 case (170_pInt)
   msg = 'sum of phase fractions differs from 1'
 case (180_pInt)
   msg = 'mismatch of microstructure count and a*b*c in geom file'
 case (200_pInt)
   msg = 'unknown constitution specified'
 case (201_pInt)
   msg = 'unknown homogenization specified'
 case (205_pInt)
   msg = 'unknown lattice structure encountered'
 case (210_pInt)
   msg = 'negative initial resistance'
 case (211_pInt)
   msg = 'non-positive reference shear rate'
 case (212_pInt)
   msg = 'non-positive stress exponent'
 case (213_pInt)
   msg = 'non-positive saturation stress'
 case (214_pInt)
   msg = 'zero hardening exponent'
 case (220_pInt)
   msg = 'negative initial dislocation density'
 case (221_pInt)
   msg = 'negative Burgers vector'
 case (222_pInt)
   msg = 'negative activation energy for edge dislocation glide'
 case (223_pInt)
   msg = 'zero stackin fault energy'
 case (225_pInt)
   msg = 'no slip systems specified'
 case (226_pInt)
   msg = 'non-positive prefactor for dislocation velocity'
 case (227_pInt)
   msg = 'non-positive prefactor for mean free path'
 case (228_pInt)
   msg = 'non-positive minimum stable dipole distance'
 case (229_pInt)
   msg = 'non-positive hardening interaction coefficients'
 case (230_pInt)
   msg = 'non-positive atomic volume'
 case (231_pInt)
   msg = 'non-positive prefactor for self-diffusion coefficient'
 case (232_pInt)
   msg = 'non-positive activation energy for self-diffusion'
 case (233_pInt)
   msg = 'non-positive relevant dislocation density'   
 case (234_pInt)
   msg = 'error in shear banding input'   
 case (235_pInt)
   msg = 'material parameter for nonlocal constitutive phase out of bounds:'
 case (236_pInt)
   msg = 'unknown material parameter for nonlocal constitutive phase:'
 case (237_pInt)
   msg = 'unknown constitutive output for nonlocal constitution:'
 case (240_pInt)
   msg = 'non-positive Taylor factor'
 case (241_pInt)
   msg = 'non-positive hardening exponent'
 case (242_pInt)
   msg = 'non-positive relevant slip resistance'   
 case (260_pInt)
   msg = 'non-positive relevant strain'
 case (261_pInt)
   msg = 'frequency of stiffness update < 0'
 case (262_pInt)
   msg = 'frequency of Jacobian update of Lp residuum < 0'
 case (263_pInt)
   msg = 'non-positive perturbation value'
 case (264_pInt)
   msg = 'limit for homogenization loop too small'
 case (265_pInt)
   msg = 'limit for crystallite loop too small'
 case (266_pInt)
   msg = 'limit for state loop too small'
 case (267_pInt)
   msg = 'limit for stress loop too small'
 case (268_pInt)
   msg = 'non-positive minimum substep size'
 case (269_pInt)
   msg = 'non-positive relative state tolerance'
 case (270_pInt)
   msg = 'Non-positive relative stress tolerance'
 case (271_pInt)
   msg = 'Non-positive absolute stress tolerance'

!* Error messages related to RGC numerical parameters <<<updated 31.07.2009>>>
 case (272_pInt)
   msg = 'non-positive relative tolerance of residual in RGC'
 case (273_pInt)
   msg = 'non-positive absolute tolerance of residual in RGC'
 case (274_pInt)
   msg = 'non-positive relative maximum of residual in RGC'
 case (275_pInt)
   msg = 'non-positive absolute maximum of residual in RGC'
 case (276_pInt)
   msg = 'non-positive penalty perturbation in RGC'
 case (277_pInt)
   msg = 'non-positive relevant mismatch in RGC'
 case (278_pInt)
   msg = 'non-positive definite viscosity model in RGC'
 case (288_pInt)
   msg = 'non-positive maximum threshold of relaxation change in RGC'
 case (289_pInt)
   msg = 'non-positive definite volume discrepancy penalty in RGC'

 case (294_pInt)
   msg = 'non-positive tolerance for deformation gradient'

 case (298_pInt)
   msg = 'chosen integration method does not exist'
 case (299_pInt)
   msg = 'chosen perturbation method does not exist'

 case (300_pInt)
   msg = 'this material can only be used with elements with three direct stress components'
 case (500_pInt)
   msg = 'unknown lattice type specified'
 case (550_pInt)
   msg = 'unknown symmetry type specified'
 case (600_pInt)
   msg = 'convergence not reached'
 case (610_pInt)
   msg = 'stress loop not converged'

 case (666_pInt)
   msg = 'memory leak detected'
 case (667_pInt)
   msg = 'invalid materialpoint result requested'

 case (670_pInt)
   msg = 'math_check: quat -> axisAngle -> quat failed'
 case (671_pInt)
   msg = 'math_check: quat -> R -> quat failed'
 case (672_pInt)
   msg = 'math_check: quat -> euler -> quat failed'
 case (673_pInt)
   msg = 'math_check: R -> euler -> R failed'

 case (700_pInt)
   msg = 'singular matrix in stress iteration'

 case (800_pInt)
   msg = 'matrix inversion error'
 case (801_pInt)
   msg = 'I_TO_HALTON-error: An input base BASE is <= 1'
 case (802_pInt)
   msg = 'Prime-error: N must be between 0 and PRIME_MAX'

!    Error messages related to parsing of Abaqus input file
 case (900_pInt)
   msg = 'PARSE ERROR: Improper definition of nodes in input file (Nnodes < 2)'
 case (901_pInt)
   msg = 'PARSE ERROR: No Elements defined in input file (Nelems = 0)'
 case (902_pInt)
   msg = 'PARSE ERROR: No Element sets defined in input file (Atleast one *Elset must exist)'
 case (903_pInt)
   msg = 'PARSE ERROR: No Materials defined in input file (Look into section assigments)'
 case (904_pInt)
   msg = 'PARSE ERROR: No elements could be assigned for Elset: '
 case (905_pInt)
   msg = 'PARSE ERROR: Error in mesh_abaqus_map_materials'
 case (906_pInt)
   msg = 'PARSE ERROR: Error in mesh_abaqus_count_cpElements'
 case (907_pInt)
   msg = 'PARSE ERROR: Incorrect size of mesh_mapFEtoCPelem in mesh_abaqus_map_elements; Size cannot be zero'
 case (908_pInt)
   msg = 'PARSE ERROR: Incorrect size of mesh_mapFEtoCPnode in mesh_abaqus_map_nodes; Size cannot be zero'
 case (909_pInt)
   msg = 'PARSE ERROR: Incorrect size of mesh_node in mesh_abaqus_build_nodes; must be equal to mesh_Nnodes'
 case (910_pInt)
   msg = 'PARSE ERROR: Incorrect element type mapping in '
 
 
 case default
   msg = 'Unknown error number...'
 end select
 
 !$OMP CRITICAL (write2out)
 write(6,*)
 write(6,'(a38)')        '+------------------------------------+'
 write(6,'(a38)')        '+               error                +'
 write(6,'(a17,i3,a18)') '+                ',error_ID,'                 +'
 write(6,'(a38)')        '+                                    +'
 write(6,'(a2,a)')       '+ ', trim(msg)
 if (present(ext_msg))  write(6,'(a2,a)') '+ ', trim(ext_msg)
 if (present(e)) then
   if (present(i) .and. present(g)) then
     write(6,'(a13,i6,a4,i2,a7,i4,a2)') '+ at element ',e,' IP ',i,' grain ',g,' +'
   else
     write(6,'(a18,i6,a14)') '+              at ',e,'             +'
   endif
 endif
 write(6,'(a38)') '+------------------------------------+'
 call flush(6)
 call quit(9000_pInt+error_ID)
 !$OMP END CRITICAL (write2out)

! ABAQUS returns in some cases

 endsubroutine


!********************************************************************
! write warning statements to standard out
!********************************************************************
 subroutine IO_warning(warning_ID,e,i,g,ext_msg)

 use prec, only: pInt
 implicit none

 integer(pInt), intent(in) :: warning_ID
 integer(pInt), optional, intent(in) :: e,i,g
 character(len=*), optional, intent(in) :: ext_msg
 character(len=1024) msg

 select case (warning_ID)
 case (34_pInt)
   msg = 'invalid restart increment given'
 case (35_pInt)
   msg = 'could not get $DAMASK_NUM_THREADS'
 case (47_pInt)
   msg = 'No valid parameter for FFTW given, using FFTW_PATIENT'
 case (101_pInt)
   msg = '+    crystallite debugging off...    +'
 case (600_pInt)
   msg = '+  crystallite responds elastically  +'
 case (601_pInt)
   msg = '+      stiffness close to zero       +'
 case (650_pInt)
   msg = '+     polar decomposition failed     +'
 case (700_pInt)
   msg = '+      unknown crystal symmetry      +'
 case default
   msg = '+     unknown warning number...      +'
 end select
 
 !$OMP CRITICAL (write2out)
 write(6,*)
 write(6,'(a38)')        '+------------------------------------+'
 write(6,'(a38)')        '+              warning               +'
 write(6,'(a38)')        '+                                    +'
 write(6,'(a17,i3,a18)') '+                ',warning_ID,'                 +'
 write(6,'(a2,a)') '+ ', trim(msg)
 if (present(ext_msg))  write(6,'(a2,a)') '+ ', trim(ext_msg)
 if (present(e)) then
   if (present(i)) then
     if (present(g)) then
       write(6,'(a12,1x,i6,1x,a2,1x,i2,1x,a5,1x,i4,a2)') '+ at element',e,'IP',i,'grain',g,' +'
     else
       write(6,'(a12,1x,i6,1x,a2,1x,i2,a13)') '+ at element',e,'IP',i,'            +'
     endif
   else
     write(6,'(a12,1x,i6,a19)') '+ at element',e,'             +'
   endif
 endif
 write(6,'(a38)') '+------------------------------------+'
 call flush(6)
 !$OMP END CRITICAL (write2out)

 endsubroutine
 
 END MODULE IO