xmlOutput.F90 30.8 KB
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!--------------------------------------------------------------------------------
! Copyright (c) 2016 Peter Grünberg Institut, Forschungszentrum Jülich, Germany
! This file is part of FLEUR and available as free software under the conditions
! of the MIT license as expressed in the LICENSE file in more detail.
!--------------------------------------------------------------------------------

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MODULE m_xmlOutput

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!
!!!   XML output service routines
!!!
!!!   This module provides several subroutines that simplify the
!!!   generation of the out.xml file.
!!!                                         GM'16
!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

   IMPLICIT NONE

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   PRIVATE
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   INTEGER, SAVE :: currentElementIndex
   INTEGER, SAVE :: maxNumElements
   INTEGER, SAVE :: xmlOutputUnit
   CHARACTER(LEN= 40), ALLOCATABLE :: elementList(:)

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   PUBLIC startXMLOutput, endXMLOutput
   PUBLIC writeXMLElementFormPoly, writeXMLElementPoly
   PUBLIC writeXMLElementForm, writeXMLElement
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   PUBLIC writeXMLElementMatrixPoly, writeXMLElementMatrixFormPoly
   PUBLIC writeXMLElementMatrixForm
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   PUBLIC openXMLElementFormPoly, openXMLElementPoly
   PUBLIC openXMLElementForm, openXMLElement
   PUBLIC openXMLElementNoAttributes, closeXMLElement
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   PUBLIC getXMLOutputUnitNumber, isCurrentXMLElement
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   CONTAINS

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   FUNCTION getXMLOutputUnitNumber()
      IMPLICIT NONE
      INTEGER getXMLOutputUnitNumber
      getXMLOutputUnitNumber = xmlOutputUnit
   END FUNCTION getXMLOutputUnitNumber

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   SUBROUTINE startXMLOutput()
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      USE m_juDFT_args
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      USE m_constants
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      USE m_utility
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      USE m_compile_descr
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!$    use omp_lib
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      IMPLICIT NONE
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#ifdef CPP_MPI
      include "mpif.h"
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      INTEGER           :: err, isize
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#endif
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      INTEGER           :: numFlags
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      INTEGER           :: nOMPThreads
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      CHARACTER(LEN=8)  :: date
      CHARACTER(LEN=10) :: time
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      CHARACTER(LEN=10) :: zone
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      CHARACTER(LEN=10) :: dateString
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      CHARACTER(LEN=10) :: timeString
      CHARACTER(LEN=6)  :: precisionString
      CHARACTER(LEN=9)  :: flags(11)
      CHARACTER(LEN=20) :: structureSpecifiers(11)
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      CHARACTER(:), ALLOCATABLE :: gitdesc,githash,gitbranch,compile_date,compile_user,compile_host
      CHARACTER(:), ALLOCATABLE :: compile_flags,link_flags
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      CHARACTER(LEN=1000) :: gitdescTemp,githashTemp,gitbranchTemp,compile_dateTemp,compile_userTemp,compile_hostTemp
      CHARACTER(LEN=1000) :: compile_flagsTemp,link_flagsTemp
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      CHARACTER(LEN=20) :: attributes(7)
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      maxNumElements = 10
      ALLOCATE(elementList(maxNumElements))
      elementList = ''
      currentElementIndex = 0
      xmlOutputUnit = 53
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      CALL DATE_AND_TIME(date,time,zone)
      WRITE(dateString,'(a4,a1,a2,a1,a2)') date(1:4),'/',date(5:6),'/',date(7:8)
      WRITE(timeString,'(a2,a1,a2,a1,a2)') time(1:2),':',time(3:4),':',time(5:6)
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      IF (juDFT_was_argument("-info")) THEN
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         OPEN (xmlOutputUnit,status='scratch')
      ELSE
         OPEN (xmlOutputUnit,file='out.xml',form='formatted',status='unknown')
      ENDIF
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      WRITE (xmlOutputUnit,'(a)') '<?xml version="1.0" encoding="UTF-8" standalone="no"?>'
      WRITE (xmlOutputUnit,'(a)') '<fleurOutput fleurOutputVersion="0.27">'
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      CALL openXMLElement('programVersion',(/'version'/),(/version_const/))
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      CALL get_compile_desc(gitdesc,githash,gitbranch,compile_date,compile_user,compile_host,compile_flags,link_flags)
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      gitdescTemp = gitdesc
      githashTemp = githash
      gitbranchTemp = gitbranch
      compile_dateTemp = compile_date
      compile_userTemp = compile_user
      compile_hostTemp = compile_host
      compile_flagsTemp = compile_flags
      link_flagsTemp = link_flags
      CALL writeXMLElement('compilationInfo',(/'date','user','host','flag','link'/),(/compile_dateTemp,compile_userTemp,compile_hostTemp,compile_flagsTemp,link_flagsTemp/))
      CALL writeXMLElement('gitInfo',(/'version       ','branch        ','lastCommitHash'/),(/gitdescTemp,gitbranchTemp,githashTemp/))
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      CALL getComputerArchitectures(flags, numFlags)
      IF (numFlags.EQ.0) THEN
         numFlags = 1
         flags(numFlags) = 'GEN'
      END IF
      CALL writeXMLElementNoAttributes('targetComputerArchitectures',flags(1:numFlags))
      IF (numFlags.GT.1) THEN 
         STOP "ERROR: Define only one system architecture! (called by xmlOutput)"
      END IF
      CALL getPrecision(precisionString)
      CALL writeXMLElement('precision',(/'type'/),(/precisionString/))
      CALL getTargetStructureProperties(structureSpecifiers, numFlags)
      CALL writeXMLElementNoAttributes('targetStructureClass',structureSpecifiers(1:numFlags))
      CALL getAdditionalCompilationFlags(flags, numFlags)
      IF (numFlags.GE.1) THEN
         CALL writeXMLElementNoAttributes('additionalCompilerFlags',flags(1:numFlags))
      END IF
      CALL closeXMLElement('programVersion')
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      CALL openXMLElementNoAttributes('parallelSetup')
      nOMPThreads = -1
      !$ nOMPThreads=omp_get_max_threads()
      IF(nOMPThreads.NE.-1) THEN
         WRITE(attributes(1),'(i0)') nOMPThreads
         CALL writeXMLElementFormPoly('openMP',(/'ompThreads'/),&
                                      attributes(:1),reshape((/10,8/),(/1,2/)))
      END IF

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#ifdef CPP_MPI
      CALL MPI_COMM_SIZE(MPI_COMM_WORLD,isize,err)
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      WRITE(attributes(1),'(i0)') isize
      CALL writeXMLElementFormPoly('mpi',(/'mpiProcesses'/),&
                                   attributes(:1),reshape((/13,8/),(/1,2/)))
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#endif
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      CALL closeXMLElement('parallelSetup')

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      CALL writeXMLElement('startDateAndTime',(/'date','time','zone'/),(/dateString,timeString,zone/))
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   END SUBROUTINE startXMLOutput

   SUBROUTINE endXMLOutput()
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      IMPLICIT NONE
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      CHARACTER(LEN=8)  :: date
      CHARACTER(LEN=10) :: time
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      CHARACTER(LEN=10)  :: zone
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      CHARACTER(LEN=10) :: dateString
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      CHARACTER(LEN=10)  :: timeString
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      DO WHILE (currentElementIndex.NE.0)
         CALL closeXMLElement(elementList(currentElementIndex))
      END DO
      DEALLOCATE(elementList)
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      CALL DATE_AND_TIME(date,time,zone)
      WRITE(dateString,'(a4,a1,a2,a1,a2)') date(1:4),'/',date(5:6),'/',date(7:8)
      WRITE(timeString,'(a2,a1,a2,a1,a2)') time(1:2),':',time(3:4),':',time(5:6)
      CALL writeXMLElement('endDateAndTime',(/'date','time','zone'/),(/dateString,timeString,zone/))
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      WRITE (xmlOutputUnit,'(a)') '</fleurOutput>'
      CLOSE(xmlOutputUnit)
   END SUBROUTINE endXMLOutput

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   SUBROUTINE writeXMLElementFormPoly(elementName,attributeNames,attributeValues,lengths,contentList)
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      IMPLICIT NONE

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      CHARACTER(LEN=*), INTENT(IN)           :: elementName
      CHARACTER(LEN=*), INTENT(IN)           :: attributeNames(:)
      CLASS(*),         INTENT(IN)           :: attributeValues(:)
      INTEGER,          INTENT(IN)           :: lengths(:,:)
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      CLASS(*),         INTENT(IN), OPTIONAL :: contentList(1:)
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      CHARACTER(LEN= 30), ALLOCATABLE :: charAttributeValues(:)
      CHARACTER(LEN= 30), ALLOCATABLE :: charContentList(:)
      INTEGER                         :: i

      ALLOCATE(charAttributeValues(SIZE(attributeValues)))
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      IF (PRESENT(contentList)) THEN
         ALLOCATE(charContentList(SIZE(contentList)))
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      ELSE
         ALLOCATE(charContentList(1))
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      END IF
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      charAttributeValues = ''
      charContentList = ''

      DO i = 1, SIZE(attributeValues)
         SELECT TYPE (attributeValues)
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           TYPE IS(INTEGER)
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               WRITE(charAttributeValues(i),'(i0)') attributeValues(i)
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            TYPE IS(REAL)
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               WRITE(charAttributeValues(i),'(f19.10)') attributeValues(i)
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            TYPE IS(LOGICAL)
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               WRITE(charAttributeValues(i),'(l1)') attributeValues(i)
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#ifndef __PGI
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            TYPE IS(CHARACTER(LEN=*))
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               WRITE(charAttributeValues(i),'(a)') TRIM(ADJUSTL(attributeValues(i)))
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            CLASS DEFAULT
               STOP 'Type of attributeValues not allowed'
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#endif
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         END SELECT
      END DO

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      IF (PRESENT(contentList)) THEN
         DO i = 1, SIZE(contentList)
            SELECT TYPE(contentList)
               TYPE IS(INTEGER)
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#ifndef __PGI
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                  WRITE(charContentList(i),'(i0)') contentList(i)
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               TYPE IS(REAL)
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                  WRITE(charContentList(i),'(f19.10)') contentList(i)
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               TYPE IS(LOGICAL)
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                  WRITE(charContentList(i),'(l1)') contentList(i)
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               TYPE IS(CHARACTER(LEN=*))
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                  WRITE(charContentList(i),'(a)') TRIM(ADJUSTL(contentList(i)))
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               CLASS DEFAULT
                  STOP 'Type of contentList not allowed'
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#endif
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            END SELECT
         END DO
         CALL writeXMLElementForm(elementName,attributeNames,charAttributeValues,lengths,charContentList)
         DEALLOCATE(charContentList,charAttributeValues)
      ELSE
         CALL writeXMLElementForm(elementName,attributeNames,charAttributeValues,lengths)
      END IF

   END SUBROUTINE writeXMLElementFormPoly

   SUBROUTINE writeXMLElementPoly(elementName,attributeNames,attributeValues,contentList)

      IMPLICIT NONE

      CHARACTER(LEN=*), INTENT(IN)           :: elementName
      CHARACTER(LEN=*), INTENT(IN)           :: attributeNames(:)
      CLASS(*),         INTENT(IN)           :: attributeValues(:)
      CLASS(*),         INTENT(IN), OPTIONAL :: contentList(:)
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      INTEGER, ALLOCATABLE :: lengths(:,:)
      INTEGER              :: contentListSize
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      contentListSize = 0
      IF (PRESENT(contentList)) THEN
         contentListSize = SIZE(contentList)
      END IF

      ALLOCATE(lengths(MAX(SIZE(attributeNames),contentListSize),3))
      lengths = 0
      CALL writeXMLElementFormPoly(elementName,attributeNames,attributeValues,lengths,contentList)
      DEALLOCATE(lengths)
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   END SUBROUTINE writeXMLElementPoly

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   SUBROUTINE writeXMLElementForm(elementName,attributeNames,attributeValues,lengths,contentList)
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      IMPLICIT NONE

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      CHARACTER(LEN=*), INTENT(IN)           :: elementName
      CHARACTER(LEN=*), INTENT(IN)           :: attributeNames(:)
      CHARACTER(LEN=*), INTENT(IN)           :: attributeValues(:)
      INTEGER,          INTENT(IN)           :: lengths(:,:)
      CHARACTER(LEN=*), INTENT(IN), OPTIONAL :: contentList(:)
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      CHARACTER(LEN=200), ALLOCATABLE :: contentLineList(:)
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      INTEGER, ALLOCATABLE            :: bigLengths(:,:)
      INTEGER :: i, j, contentLineLength, contentLineListSize
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      CHARACTER(LEN=150)               :: format
      CHARACTER(LEN=1000)              :: outputString
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      INTEGER                         :: contentListSize, overallListSize, numContentLineChars
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      INTEGER                         :: lengthsShape(2)
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      IF(SIZE(attributeNames).NE.SIZE(attributeValues)) THEN
         WRITE(*,*) 'attributeNames', attributeNames
         WRITE(*,*) 'attributeValues', attributeValues
         STOP 'ERROR: SIZE(attributeNames).NE.SIZE(attributeValues)'
      END IF
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      lengthsShape = SHAPE(lengths)
      contentListSize = 0
      IF (PRESENT(contentList)) THEN
         contentListSize = SIZE(contentList)
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      END IF
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      overallListSize = MAX(SIZE(attributeNames),contentListSize)
      ALLOCATE(bigLengths(overallListSize,2))
      bigLengths = 0
      DO j = 1, 2
         DO i = 1, MIN(overallListSize,lengthsShape(1))
            bigLengths(i,j) = lengths(i,j)
         END DO
      END DO

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      outputString = '<'//TRIM(ADJUSTL(elementName))
      DO i = 1, SIZE(attributeNames)
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         WRITE(format,'(a)') "(a,a,a"
         IF (bigLengths(i,1).GT.0) WRITE(format,'(a,i0)') TRIM(ADJUSTL(format)),bigLengths(i,1)
         WRITE(format,'(a,a)') TRIM(ADJUSTL(format)),",a,a"
         IF (bigLengths(i,2).GT.0) WRITE(format,'(a,i0)') TRIM(ADJUSTL(format)),bigLengths(i,2)
         WRITE(format,'(a,a)') TRIM(ADJUSTL(format)),",a)"
         WRITE(outputString,format) TRIM(ADJUSTL(outputString)), ' ', TRIM(ADJUSTL(attributeNames(i))),&
                                    '="', TRIM(ADJUSTL(attributeValues(i))), '"'
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      END DO
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      WRITE(format,'(a,i0,a)') "(a",3*(currentElementIndex+1),",a)"
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      IF (PRESENT(contentList)) THEN
         contentLineLength = 5 ! At most 5 data elements per line
         contentLineListSize = SIZE(contentList) / contentLineLength
         IF(contentLineListSize*contentLineLength.NE.SIZE(contentList)) THEN
            contentLineListSize = contentLineListSize + 1
         END IF
         ALLOCATE(contentLineList(contentLineListSize))
         CALL fillContentLineList(contentList,contentLineList,contentLineLength)
         IF(SIZE(contentLineList).LE.1) THEN
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            outputString = TRIM(ADJUSTL(outputString))//'>'//TRIM(ADJUSTL(contentLineList(1)))//'</'//&
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                 TRIM(ADJUSTL(elementName))//'>'
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         ELSE
            outputString = TRIM(ADJUSTL(outputString))//'>'
         END IF
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         WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(outputString))
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         IF(SIZE(contentLineList).GT.1) THEN
            DO i = 1, SIZE(contentLineList)
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               IF (i.EQ.SIZE(contentLineList)) THEN
                  numContentLineChars = 20*MOD(SIZE(contentList),contentLineLength)
                  IF(numContentLineChars.EQ.0) numContentLineChars = 20 * contentLineLength
                  WRITE(format,'(a,i0,a,i0,a)') "(a",3*(currentElementIndex+2),",a",numContentLineChars,")"
               ELSE
                  WRITE(format,'(a,i0,a)') "(a",3*(currentElementIndex+2),",a100)"
               END IF
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               WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(contentLineList(i)))
            END DO
            WRITE(format,'(a,i0,a)') "(a",3*(currentElementIndex+1),",a)"
            outputString = '</'//TRIM(ADJUSTL(elementName))//'>'
            WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(outputString))
         END IF
      ELSE
         outputString = TRIM(ADJUSTL(outputString))//'/>'
         WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(outputString))
      END IF
      DEALLOCATE (bigLengths)
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   END SUBROUTINE writeXMLElementForm

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   SUBROUTINE writeXMLElementMatrixPoly(elementName,attributeNames,attributeValues,matrix)

      IMPLICIT NONE

      CHARACTER(LEN=*), INTENT(IN)           :: elementName
      CHARACTER(LEN=*), INTENT(IN)           :: attributeNames(:)
      CLASS(*),         INTENT(IN)           :: attributeValues(:)
      CLASS(*),         INTENT(IN)           :: matrix(:,:)

      INTEGER, ALLOCATABLE :: lengths(:,:)
      INTEGER              :: numDifferentMatrixElementLengths

      numDifferentMatrixElementLengths = 1 ! At the moment nothing else is implemented.
                                           ! In principle one could think about an own
                                           ! length for each matrix element.

      ALLOCATE(lengths(MAX(SIZE(attributeNames),numDifferentMatrixElementLengths),3))
      lengths = 0
      CALL writeXMLElementMatrixFormPoly(elementName,attributeNames,attributeValues,lengths,matrix)
      DEALLOCATE(lengths)

   END SUBROUTINE writeXMLElementMatrixPoly

   SUBROUTINE writeXMLElementMatrixFormPoly(elementName,attributeNames,attributeValues,lengths,matrix)

      IMPLICIT NONE

      CHARACTER(LEN=*), INTENT(IN)           :: elementName
      CHARACTER(LEN=*), INTENT(IN)           :: attributeNames(:)
      CLASS(*),         INTENT(IN)           :: attributeValues(:)
      INTEGER,          INTENT(IN)           :: lengths(:,:)
      CLASS(*),         INTENT(IN)           :: matrix(:,:)

      CHARACTER(LEN= 30), ALLOCATABLE :: charAttributeValues(:)
      CHARACTER(LEN= 50), ALLOCATABLE :: charMatrix(:,:)
      INTEGER                         :: i, j

      ALLOCATE(charAttributeValues(SIZE(attributeValues)))
      ALLOCATE(charMatrix(SIZE(matrix,1),SIZE(matrix,2)))

      charAttributeValues = ''
      charMatrix = ''

      DO i = 1, SIZE(attributeValues)
         SELECT TYPE (attributeValues)
           TYPE IS(INTEGER)
               WRITE(charAttributeValues(i),'(i0)') attributeValues(i)
            TYPE IS(REAL)
               WRITE(charAttributeValues(i),'(f19.10)') attributeValues(i)
            TYPE IS(LOGICAL)
               WRITE(charAttributeValues(i),'(l1)') attributeValues(i)
#ifndef __PGI
            TYPE IS(CHARACTER(LEN=*))
               WRITE(charAttributeValues(i),'(a)') TRIM(ADJUSTL(attributeValues(i)))
            CLASS DEFAULT
               STOP 'Type of attributeValues not allowed'
#endif
         END SELECT
      END DO

      DO j = 1, SIZE(matrix,2)
         DO i = 1, SIZE(matrix,1)
            SELECT TYPE(matrix)
               TYPE IS(INTEGER)
                  WRITE(charMatrix(i,j),'(i0)') matrix(i,j)
               TYPE IS(REAL)
                  WRITE(charMatrix(i,j),'(f19.10)') matrix(i,j)
               TYPE IS(COMPLEX)
                  WRITE(charMatrix(i,j),'(a,SP,f8.5,a,f8.5,a)') '(',REAL(matrix(i,j)),',', AIMAG(matrix(i,j)),')'
               TYPE IS(LOGICAL)
                  WRITE(charMatrix(i,j),'(l1)') matrix(i,j)
#ifndef __PGI
               TYPE IS(CHARACTER(LEN=*))
                  WRITE(charMatrix(i,j),'(a)') TRIM(ADJUSTL(matrix(i,j)))
               CLASS DEFAULT
                  STOP 'Type of matrix not allowed'
#endif
            END SELECT
         END DO
      END DO

      CALL writeXMLElementMatrixForm(elementName,attributeNames,charAttributeValues,lengths,charMatrix)
      DEALLOCATE(charMatrix,charAttributeValues)
   END SUBROUTINE writeXMLElementMatrixFormPoly

   SUBROUTINE writeXMLElementMatrixForm(elementName,attributeNames,attributeValues,lengths,matrix)

      IMPLICIT NONE

      CHARACTER(LEN=*), INTENT(IN) :: elementName
      CHARACTER(LEN=*), INTENT(IN) :: attributeNames(:)
      CHARACTER(LEN=*), INTENT(IN) :: attributeValues(:)
      INTEGER,          INTENT(IN) :: lengths(:,:)
      CHARACTER(LEN=*), INTENT(IN) :: matrix(:,:)

      CHARACTER(LEN=400), ALLOCATABLE :: matrixRows(:)
      INTEGER, ALLOCATABLE            :: bigLengths(:,:)
      INTEGER                         :: i, j
      CHARACTER(LEN=70)               :: format
      CHARACTER(LEN=400)              :: outputString
      INTEGER                         :: matrixRowLength, numMatrixRows
      INTEGER                         :: overallListSize
      INTEGER                         :: lengthsShape(2)

      IF(SIZE(attributeNames).NE.SIZE(attributeValues)) THEN
         WRITE(*,*) 'attributeNames', attributeNames
         WRITE(*,*) 'attributeValues', attributeValues
         STOP 'ERROR in writeXMLElementMatrixForm: SIZE(attributeNames).NE.SIZE(attributeValues)'
      END IF

      lengthsShape = SHAPE(lengths)

      overallListSize = MAX(SIZE(attributeNames),1)
      ALLOCATE(bigLengths(overallListSize,2))
      bigLengths = 0
      DO j = 1, 2
         DO i = 1, MIN(overallListSize,lengthsShape(1))
            bigLengths(i,j) = lengths(i,j)
         END DO
      END DO

      outputString = '<'//TRIM(ADJUSTL(elementName))
      DO i = 1, SIZE(attributeNames)
         WRITE(format,'(a)') "(a,a,a"
         IF (bigLengths(i,1).GT.0) WRITE(format,'(a,i0)') TRIM(ADJUSTL(format)),bigLengths(i,1)
         WRITE(format,'(a,a)') TRIM(ADJUSTL(format)),",a,a"
         IF (bigLengths(i,2).GT.0) WRITE(format,'(a,i0)') TRIM(ADJUSTL(format)),bigLengths(i,2)
         WRITE(format,'(a,a)') TRIM(ADJUSTL(format)),",a)"
         WRITE(outputString,format) TRIM(ADJUSTL(outputString)), ' ', TRIM(ADJUSTL(attributeNames(i))),&
                                    '="', TRIM(ADJUSTL(attributeValues(i))), '"'
      END DO
      WRITE(format,'(a,i0,a)') "(a",3*(currentElementIndex+1),",a)"

      matrixRowLength = SIZE(matrix,1)
      numMatrixRows = SIZE(matrix,2)

      ALLOCATE(matrixRows(numMatrixRows))

      matrixRows = ''
      DO i = 1, numMatrixRows
         DO j = 1, matrixRowLength
            WRITE(matrixRows(i),'(a,a1,a)') TRIM(ADJUSTL(matrixRows(i))),' ',TRIM(ADJUSTL(matrix(j,i)))
         END DO
      END DO

      outputString = TRIM(ADJUSTL(outputString))//'>'
      WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(outputString))

      DO i = 1, numMatrixRows
         WRITE(format,'(a,i0,a)') "(a",3*(currentElementIndex+2),",a)"
         WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(matrixRows(i)))
      END DO

      WRITE(format,'(a,i0,a)') "(a",3*(currentElementIndex+1),",a)"
      outputString = '</'//TRIM(ADJUSTL(elementName))//'>'
      WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(outputString))

      DEALLOCATE (bigLengths)

   END SUBROUTINE writeXMLElementMatrixForm

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   SUBROUTINE writeXMLElement(elementName,attributeNames,attributeValues,contentList)

      IMPLICIT NONE

      CHARACTER(LEN=*), INTENT(IN)           :: elementName
      CHARACTER(LEN=*), INTENT(IN)           :: attributeNames(:)
      CHARACTER(LEN=*), INTENT(IN)           :: attributeValues(:)
      CHARACTER(LEN=*), INTENT(IN), OPTIONAL :: contentList(:)

      INTEGER, ALLOCATABLE :: lengths(:,:)
      INTEGER              :: contentListSize

      contentListSize = 0
      IF (PRESENT(contentList)) THEN
         contentListSize = SIZE(contentList)
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      END IF
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      ALLOCATE(lengths(MAX(SIZE(attributeNames),contentListSize),2))
      lengths = 0
      CALL writeXMLElementForm(elementName,attributeNames,attributeValues,lengths,contentList)
      DEALLOCATE(lengths)
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   END SUBROUTINE writeXMLElement

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   SUBROUTINE writeXMLElementNoAttributes(elementName,contentList)

      IMPLICIT NONE

      CHARACTER(LEN=*), INTENT(IN)           :: elementName
      CHARACTER(LEN=*), INTENT(IN)           :: contentList(:)

      CHARACTER(LEN=200), ALLOCATABLE :: contentLineList(:)
      INTEGER :: i, j, contentLineLength, contentLineListSize
      CHARACTER(LEN=70)               :: format
      CHARACTER(LEN=200)              :: outputString
      INTEGER                         :: contentListSize, overallListSize, numContentLineChars

      outputString = '<'//TRIM(ADJUSTL(elementName))

      WRITE(format,'(a,i0,a)') "(a",3*(currentElementIndex+1),",a)"

      contentLineLength = 5 ! At most 5 data elements per line
      contentLineListSize = SIZE(contentList) / contentLineLength
      IF(contentLineListSize*contentLineLength.NE.SIZE(contentList)) THEN
         contentLineListSize = contentLineListSize + 1
      END IF
      ALLOCATE(contentLineList(contentLineListSize))
      CALL fillContentLineList(contentList,contentLineList,contentLineLength)
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      IF(contentLineListSize.EQ.0) THEN
         outputString = TRIM(ADJUSTL(outputString))//'> </'//TRIM(ADJUSTL(elementName))//'>'
      ELSE IF(contentLineListSize.EQ.1) THEN
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         outputString = TRIM(ADJUSTL(outputString))//'>'//TRIM(ADJUSTL(contentLineList(1)))//'</'//&
              TRIM(ADJUSTL(elementName))//'>'
      ELSE
         outputString = TRIM(ADJUSTL(outputString))//'>'
      END IF
      WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(outputString))
      IF(contentLineListSize.GT.1) THEN
         DO i = 1, SIZE(contentLineList)
            IF (i.EQ.SIZE(contentLineList)) THEN
               numContentLineChars = 20*MOD(SIZE(contentList),contentLineLength)
               IF(numContentLineChars.EQ.0) numContentLineChars = 20 * contentLineLength
               WRITE(format,'(a,i0,a,i0,a)') "(a",3*(currentElementIndex+2),",a",numContentLineChars,")"
            ELSE
               WRITE(format,'(a,i0,a)') "(a",3*(currentElementIndex+2),",a100)"
            END IF
            WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(contentLineList(i)))
         END DO
         WRITE(format,'(a,i0,a)') "(a",3*(currentElementIndex+1),",a)"
         outputString = '</'//TRIM(ADJUSTL(elementName))//'>'
         WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(outputString))
      END IF

   END SUBROUTINE writeXMLElementNoAttributes

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   SUBROUTINE fillContentLineList(contentList,contentLineList,contentLineLength)

      IMPLICIT NONE

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      CHARACTER(LEN= *), INTENT(IN)    :: contentList(:)
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      CHARACTER(LEN=200), INTENT(INOUT) :: contentLineList(:)
      INTEGER,            INTENT(IN)    :: contentLineLength
      INTEGER :: i, j

      contentLineList = ''
      DO i = 1, SIZE(contentLineList)
         DO j = 1, contentLineLength
            IF((i-1)*contentLineLength+j.GT.SIZE(contentList)) THEN
               RETURN
            END IF
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            WRITE(contentLineList(i),'(a,a20)') TRIM(ADJUSTL(contentLineList(i))),&
                        TRIM(ADJUSTL(contentList((i-1)*contentLineLength+j)))
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         END DO
      END DO
   END SUBROUTINE fillContentLineList

   SUBROUTINE openXMLElementPoly(elementName,attributeNames,attributeValues)

      IMPLICIT NONE

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      CHARACTER(LEN=*)             :: elementName
      CHARACTER(LEN=*), INTENT(IN) :: attributeNames(:)
      CLASS(*),         INTENT(IN) :: attributeValues(:)
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      INTEGER, ALLOCATABLE :: lengths(:,:)

      ALLOCATE(lengths(SIZE(attributeNames),2))
      lengths = 0
      CALL openXMLElementFormPoly(elementName,attributeNames,attributeValues,lengths)
      DEALLOCATE(lengths)

   END SUBROUTINE openXMLElementPoly

   SUBROUTINE openXMLElementFormPoly(elementName,attributeNames,attributeValues,lengths)

      IMPLICIT NONE

      CHARACTER(LEN=*)             :: elementName
      CHARACTER(LEN=*), INTENT(IN) :: attributeNames(:)
      CLASS(*),         INTENT(IN) :: attributeValues(:)
      INTEGER,          INTENT(IN) :: lengths(:,:)

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      CHARACTER(LEN= 30), ALLOCATABLE :: charAttributeValues(:)
      INTEGER                         :: i

      ALLOCATE(charAttributeValues(SIZE(attributeValues)))

      charAttributeValues = ''

      DO i = 1, SIZE(attributeValues)
         SELECT TYPE (attributeValues)
            TYPE IS(INTEGER)
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               WRITE(charAttributeValues(i),'(i0)') attributeValues(i)
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            TYPE IS(REAL)
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               WRITE(charAttributeValues(i),'(f19.10)') attributeValues(i)
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            TYPE IS(LOGICAL)
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               WRITE(charAttributeValues(i),'(l1)') attributeValues(i)
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#ifndef __PGI
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            TYPE IS(CHARACTER(LEN=*))
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               WRITE(charAttributeValues(i),'(a)') TRIM(ADJUSTL(attributeValues(i)))
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            CLASS DEFAULT
               STOP 'Type of attributeValues not allowed'
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#endif
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         END SELECT
      END DO

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      CALL openXMLElementForm(elementName,attributeNames,charAttributeValues,lengths)
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      DEALLOCATE(charAttributeValues)

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   END SUBROUTINE openXMLElementFormPoly
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   SUBROUTINE openXMLElementNoAttributes(elementName)

      IMPLICIT NONE

      CHARACTER(LEN=*)             :: elementName

      INTEGER :: i
      CHARACTER(LEN=70)  :: format
      CHARACTER(LEN=200) :: openingString

      IF(currentElementIndex.EQ.maxNumElements) THEN
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         WRITE(*,*) 'elementName ', TRIM(ADJUSTL(elementName))
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         STOP 'ERROR: xml hierarchy too deep!'
      END IF
      currentElementIndex = currentElementIndex + 1
      elementList(currentElementIndex) = TRIM(ADJUSTL(elementName))
      openingString = '<'//TRIM(ADJUSTL(elementName))//'>'
      WRITE(format,'(a,i0,a)') "(a",3*currentElementIndex,",a)"
      WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(openingString))
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   END SUBROUTINE openXMLElementNoAttributes

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   SUBROUTINE openXMLElement(elementName,attributeNames,attributeValues)

      IMPLICIT NONE

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      CHARACTER(LEN=*), INTENT(IN)           :: elementName
      CHARACTER(LEN=*), INTENT(IN)           :: attributeNames(:)
      CHARACTER(LEN=*), INTENT(IN)           :: attributeValues(:)

      INTEGER, ALLOCATABLE :: lengths(:,:)

      ALLOCATE(lengths(SIZE(attributeNames),2))
      lengths = 0
      CALL openXMLElementForm(elementName,attributeNames,attributeValues,lengths)
      DEALLOCATE(lengths)

   END SUBROUTINE

   SUBROUTINE openXMLElementForm(elementName,attributeNames,attributeValues,lengths)

      IMPLICIT NONE

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      CHARACTER(LEN=*)             :: elementName
      CHARACTER(LEN=*), INTENT(IN) :: attributeNames(:)
      CHARACTER(LEN=*), INTENT(IN) :: attributeValues(:)
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      INTEGER,          INTENT(IN) :: lengths(:,:)
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      CHARACTER(LEN=70)  :: format
      CHARACTER(LEN=200) :: openingString

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      INTEGER, ALLOCATABLE            :: bigLengths(:,:)
      INTEGER                         :: i, j
      INTEGER                         :: overallListSize
      INTEGER                         :: lengthsShape(2)

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      IF(SIZE(attributeNames).NE.SIZE(attributeValues)) THEN
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         WRITE(*,*) 'elementName ', TRIM(ADJUSTL(elementName))
         WRITE(*,*) 'attributeNames ', attributeNames
         WRITE(*,*) 'attributeValues ', attributeValues
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         STOP 'ERROR: SIZE(attributeNames).NE.SIZE(attributeValues)'
      END IF
      IF(currentElementIndex.EQ.maxNumElements) THEN
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         WRITE(*,*) 'elementName ', TRIM(ADJUSTL(elementName))
         WRITE(*,*) 'attributeNames ', attributeNames
         WRITE(*,*) 'attributeValues ', attributeValues
         WRITE(*,*) 'elementList ', elementList
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         STOP 'ERROR: xml hierarchy too deep!'
      END IF
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      lengthsShape = SHAPE(lengths)
      overallListSize = SIZE(attributeNames)
      ALLOCATE(bigLengths(overallListSize,2))
      bigLengths = 0
      DO j = 1, 2
         DO i = 1, MIN(overallListSize,lengthsShape(1))
            bigLengths(i,j) = lengths(i,j)
         END DO
      END DO

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      openingString = '<'//TRIM(ADJUSTL(elementName))
      DO i = 1, SIZE(attributeNames)
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         WRITE(format,'(a)') "(a,a,a"
         IF (bigLengths(i,1).GT.0) WRITE(format,'(a,i0)') TRIM(ADJUSTL(format)),bigLengths(i,1)
         WRITE(format,'(a,a)') TRIM(ADJUSTL(format)),",a,a"
         IF (bigLengths(i,2).GT.0) WRITE(format,'(a,i0)') TRIM(ADJUSTL(format)),bigLengths(i,2)
         WRITE(format,'(a,a)') TRIM(ADJUSTL(format)),",a)"
         WRITE(openingString,format) TRIM(ADJUSTL(openingString)), ' ', TRIM(ADJUSTL(attributeNames(i))),&
                                    '="', TRIM(ADJUSTL(attributeValues(i))), '"'
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      END DO
      openingString = TRIM(ADJUSTL(openingString))//'>'
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      currentElementIndex = currentElementIndex + 1
      elementList(currentElementIndex) = TRIM(ADJUSTL(elementName))
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      WRITE(format,'(a,i0,a)') "(a",3*currentElementIndex,",a)"
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      WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(openingString))
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      DEALLOCATE (bigLengths)

   END SUBROUTINE openXMLElementForm
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   SUBROUTINE closeXMLElement(elementName)

      IMPLICIT NONE

      CHARACTER(LEN=*), INTENT(IN) :: elementName
      INTEGER :: i
      CHARACTER(LEN=70) :: format
      CHARACTER(LEN=70) :: closingString

      IF(TRIM(ADJUSTL(elementList(currentElementIndex))).NE.TRIM(ADJUSTL(elementName))) THEN
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         WRITE(*,*) 'elementList(currentElementIndex): ', TRIM(ADJUSTL(elementList(currentElementIndex)))
         WRITE(*,*) 'elementName ', TRIM(ADJUSTL(elementName))
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         STOP 'ERROR: Closing xml element inconsistency!'
      END IF
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      closingString = '</'//TRIM(ADJUSTL(elementName))//'>'
      WRITE(format,'(a,i0,a)') "(a",3*currentElementIndex,",a)"
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      WRITE(xmlOutputUnit,format) ' ', TRIM(ADJUSTL(closingString))
      currentElementIndex = currentElementIndex - 1
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   END SUBROUTINE closeXMLElement

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   LOGICAL FUNCTION isCurrentXMLElement(elementName)

      IMPLICIT NONE

      CHARACTER(LEN=*), INTENT(IN) :: elementName
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      if (currentElementIndex==0.or.currentElementIndex>SIZE(elementList)) THEN
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                  isCurrentXMLElement=.false.
                  return
      endif
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      isCurrentXMLElement = (TRIM(ADJUSTL(elementList(currentElementIndex))).EQ.TRIM(ADJUSTL(elementName)))

   END FUNCTION isCurrentXMLElement

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END MODULE m_xmlOutput