DAMASK_EICMD/src/YAML_parse.f90

636 lines
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Fortran
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module YAML_parse
use prec
use IO
use YAML_types
implicit none
private
public :: YAML_init
public :: parse_flow,to_flow
contains
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!--------------------------------------------------------------------------------------------------
!> @brief do sanity checks
!--------------------------------------------------------------------------------------------------
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subroutine YAML_init
call selfTest
end subroutine YAML_init
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!--------------------------------------------------------------------------------------------------
!> @brief reads the flow style string and stores it in the form of dictionaries, lists and scalars.
!> @details A node type pointer can either point to a dictionary, list or scalar type entities.
!--------------------------------------------------------------------------------------------------
recursive function parse_flow(flow_string) result(node)
character(len=*), intent(inout) :: flow_string
class (tNode), pointer :: node
class (tNode), pointer :: myVal
character(len=pStringLen) :: key
integer :: e, & !> end position of dictionary or list
s, & !> start position of dictionary or list
d !> position of key: value separator (':')
flow_string = trim(adjustl(flow_string(:)))
if (flow_string(1:1) == '{') then ! start of a dictionary
e = 1
allocate(tDict::node)
do while (e < len_trim(flow_string))
s = e
d = s + scan(flow_string(s+1:),':')
e = d + find_end(flow_string(d+1:),'}')
key = trim(adjustl(flow_string(s+1:d-1)))
myVal => parse_flow(flow_string(d+1:e-1)) ! parse items (recursively)
select type (node)
class is (tDict)
call node%set(key,myVal)
end select
end do
elseif (flow_string(1:1) == '[') then ! start of a list
e = 1
allocate(tList::node)
do while (e < len_trim(flow_string))
s = e
e = s + find_end(flow_string(s+1:),']')
myVal => parse_flow(flow_string(s+1:e-1)) ! parse items (recursively)
select type (node)
class is (tList)
call node%append(myVal)
end select
end do
else ! scalar value
allocate(tScalar::node)
select type (node)
class is (tScalar)
node = trim(adjustl(flow_string))
end select
endif
end function parse_flow
!--------------------------------------------------------------------------------------------------
!> @brief finds location of chunk end: ',' or '}' or ']'
!> @details leaves nested lists ( '[...]' and dicts '{...}') intact
!--------------------------------------------------------------------------------------------------
integer function find_end(str,e_char)
character(len=*), intent(in) :: str
character, intent(in) :: e_char !< end of list/dict ( '}' or ']')
integer :: N_sq, & !< number of open square brackets
N_cu, & !< number of open curly brackets
i
N_sq = 0
N_cu = 0
do i = 1, len_trim(str)
if (N_sq==0 .and. N_cu==0 .and. scan(str(i:i),e_char//',') == 1) exit
N_sq = N_sq + merge(1,0,str(i:i) == '[')
N_cu = N_cu + merge(1,0,str(i:i) == '{')
N_sq = N_sq - merge(1,0,str(i:i) == ']')
N_cu = N_cu - merge(1,0,str(i:i) == '}')
enddo
find_end = i
end function find_end
!--------------------------------------------------------------------------------------------------
! @brief Returns Indentation.
! @details It determines the indentation level for a given block/line.
! In cases for nested lists, an offset is added to determine the indent of the item block (skip
! leading dashes)
!--------------------------------------------------------------------------------------------------
integer function indentDepth(line,offset)
character(len=*), intent(in) :: line
integer, optional,intent(in) :: offset
indentDepth = verify(line,IO_WHITESPACE) -1
if(present(offset)) indentDepth = indentDepth + offset
end function indentDepth
!--------------------------------------------------------------------------------------------------
! @brief check whether a string is in flow style, i.e. starts with '{' or '['
!--------------------------------------------------------------------------------------------------
logical function isFlow(line)
character(len=*), intent(in) :: line
isFlow = index(adjustl(line),'[') == 1 .or. index(adjustl(line),'{') == 1
end function isFlow
!--------------------------------------------------------------------------------------------------
! @brief check whether a string is a scalar item, i.e. starts without any special symbols
!--------------------------------------------------------------------------------------------------
logical function isScalar(line)
character(len=*), intent(in) :: line
isScalar = (.not.isKeyValue(line) .and. .not.isKey(line) .and. .not.isListItem(line) &
.and. .not.isFlow(line))
end function isScalar
!--------------------------------------------------------------------------------------------------
! @brief check whether a string is a list item, i.e. starts with '-'
!--------------------------------------------------------------------------------------------------
logical function isListItem(line)
character(len=*), intent(in) :: line
isListItem = index(adjustl(line),'-') == 1
end function isListItem
!--------------------------------------------------------------------------------------------------
! @brief check whether a string contains a key value pair of the for '<key>: <value>'
!--------------------------------------------------------------------------------------------------
logical function isKeyValue(line)
character(len=*), intent(in) :: line
isKeyValue = .false.
if( .not. isKey(line) .and. index(IO_rmComment(line),':') > 0 .and. .not. isFlow(line)) then
if(index(IO_rmComment(line),': ') > 0) then
isKeyValue = .true.
else
call IO_error(704,ext_msg=line)
endif
endif
end function isKeyValue
!--------------------------------------------------------------------------------------------------
! @brief check whether a string contains a key without a value, i.e. it ends with ':'
! ToDo: check whether this is safe for trailing spaces followed by a new line character
!--------------------------------------------------------------------------------------------------
logical function isKey(line)
character(len=*), intent(in) :: line
if(len(IO_rmComment(line)) == 0) then
isKey = .false.
else
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isKey = IO_rmComment(line(len(IO_rmComment(line)):len(IO_rmComment(line)))) == ':' &
.and. .not. isFlow(line)
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endif
end function isKey
!--------------------------------------------------------------------------------------------------
! @brief reads a line of YAML block which is already in flow style
! @details Dicts should be enlcosed within '{}' for it to be consistent with DAMASK YAML parser
!--------------------------------------------------------------------------------------------------
recursive subroutine line_isFlow(flow,s_flow,line)
character(len=*), intent(inout) :: flow !< YAML in flow style only
integer, intent(inout) :: s_flow !< start position in flow
character(len=*), intent(in) :: line
integer :: &
s, &
list_chunk, &
dict_chunk
if(index(adjustl(line),'[') == 1) then
s = index(line,'[')
flow(s_flow:s_flow) = '['
s_flow = s_flow +1
do while(s < len_trim(line))
list_chunk = s + find_end(line(s+1:),']')
if(iskeyValue(line(s+1:list_chunk-1))) then
flow(s_flow:s_flow) = '{'
s_flow = s_flow +1
call keyValue_toFlow(flow,s_flow,line(s+1:list_chunk-1))
flow(s_flow:s_flow) = '}'
s_flow = s_flow +1
elseif(isFlow(line(s+1:list_chunk-1))) then
call line_isFlow(flow,s_flow,line(s+1:list_chunk-1))
else
call line_toFlow(flow,s_flow,line(s+1:list_chunk-1))
endif
flow(s_flow:s_flow+1) = ', '
s_flow = s_flow +2
s = s + find_end(line(s+1:),']')
enddo
s_flow = s_flow - 1
if (flow(s_flow-1:s_flow-1) == ',') s_flow = s_flow - 1
flow(s_flow:s_flow) = ']'
s_flow = s_flow+1
elseif(index(adjustl(line),'{') == 1) then
s = index(line,'{')
flow(s_flow:s_flow) = '{'
s_flow = s_flow +1
do while(s < len_trim(line))
dict_chunk = s + find_end(line(s+1:),'}')
if( .not. iskeyValue(line(s+1:dict_chunk-1))) call IO_error(705,ext_msg=line)
call keyValue_toFlow(flow,s_flow,line(s+1:dict_chunk-1))
flow(s_flow:s_flow+1) = ', '
s_flow = s_flow +2
s = s + find_end(line(s+1:),'}')
enddo
s_flow = s_flow -1
if(flow(s_flow-1:s_flow-1) == ',') s_flow = s_flow -1
flow(s_flow:s_flow) = '}'
s_flow = s_flow +1
else
call line_toFlow(flow,s_flow,line)
endif
end subroutine line_isFlow
!-------------------------------------------------------------------------------------------------
! @brief reads a line of YAML block of type <key>: <value> and places it in the YAML flow style structure
! @details Makes sure that the <value> is consistent with the input required in DAMASK YAML parser
!-------------------------------------------------------------------------------------------------
recursive subroutine keyValue_toFlow(flow,s_flow,line)
character(len=*), intent(inout) :: flow !< YAML in flow style only
integer, intent(inout) :: s_flow !< start position in flow
character(len=*), intent(in) :: line
character(len=:), allocatable :: line_asStandard ! standard form of <key>: <value>
integer :: &
d_flow, &
col_pos, &
offset_value
col_pos = index(line,':')
if(isFlow(line(col_pos+1:))) then
d_flow = len_trim(adjustl(line(:col_pos)))
flow(s_flow:s_flow+d_flow+1) = trim(adjustl(line(:col_pos)))//' '
s_flow = s_flow + d_flow+1
call line_isFlow(flow,s_flow,line(col_pos+1:))
else
offset_value = indentDepth(line(col_pos+2:))
line_asStandard = line(:col_pos+1)//line(col_pos+2+offset_value:)
call line_toFlow(flow,s_flow,line_asStandard)
endif
end subroutine keyValue_toFlow
!-------------------------------------------------------------------------------------------------
! @brief reads a line of YAML block and places it in the YAML flow style structure
!-------------------------------------------------------------------------------------------------
subroutine line_toFlow(flow,s_flow,line)
character(len=*), intent(inout) :: flow !< YAML in flow style only
integer, intent(inout) :: s_flow !< start position in flow
character(len=*), intent(in) :: line
integer :: &
d_flow
d_flow = len_trim(adjustl(line))
flow(s_flow:s_flow+d_flow) = trim(adjustl(line))
s_flow = s_flow + d_flow
end subroutine line_toFlow
!-------------------------------------------------------------------------------------------------
! @brief convert a yaml list in block style to a yaml list in flow style
! @details enters the function when encountered with the list indicator '- '
! reads each scalar list item and separates each other with a ','
! If list item is non scalar, it stores the offset for that list item block
! Increase in the indentation level or when list item is not scalar -> 'decide' function is called.
! decrease in indentation level indicates the end of an indentation block
!-------------------------------------------------------------------------------------------------
recursive subroutine lst(blck,flow,s_blck,s_flow,offset)
character(len=*), intent(in) :: blck !< YAML in mixed style
character(len=*), intent(inout) :: flow !< YAML in flow style only
integer, intent(inout) :: s_blck, & !< start position in blck
s_flow, & !< start position in flow
offset !< stores leading '- ' in nested lists
character(len=pStringLen) :: line
integer :: e_blck,indent
indent = indentDepth(blck(s_blck:),offset)
do while (s_blck <= len_trim(blck))
e_blck = s_blck + index(blck(s_blck:),IO_EOL) - 2
line = IO_rmComment(blck(s_blck:e_blck))
if (len_trim(line) == 0) then
s_blck = e_blck + 2 ! forward to next line
cycle
elseif(indentDepth(line,offset) > indent) then
call decide(blck,flow,s_blck,s_flow,offset)
offset = 0
flow(s_flow:s_flow+1) = ', '
s_flow = s_flow + 2
elseif(indentDepth(line,offset) < indent .or. .not. isListItem(line)) then
offset = 0
exit ! job done (lower level)
else
if(trim(adjustl(line)) == '-') then ! list item in next line
s_blck = e_blck + 2
e_blck = e_blck + index(blck(e_blck+2:),IO_EOL)
line = IO_rmComment(blck(s_blck:e_blck))
if(indentDepth(line) < indent .or. indentDepth(line) == indent) &
call IO_error(701,ext_msg=line)
if(isScalar(line)) then
call line_toFlow(flow,s_flow,line)
s_blck = e_blck +2
offset = 0
elseif(isFlow(line)) then
call line_isFlow(flow,s_flow,line)
s_blck = e_blck +2
offset = 0
endif
else ! list item in the same line
if(line(indentDepth(line)+2:indentDepth(line)+2) /= ' ') &
call IO_error(703,ext_msg=line)
line = line(indentDepth(line)+3:)
if(isScalar(line)) then
call line_toFlow(flow,s_flow,line)
s_blck = e_blck +2
offset = 0
elseif(isFlow(line)) then
call line_isFlow(flow,s_flow,line)
s_blck = e_blck +2
offset = 0
else ! non scalar list item
offset = offset + indentDepth(blck(s_blck:))+1 ! offset in spaces to be ignored
s_blck = s_blck + index(blck(s_blck:e_blck),'-') ! s_blck after '-' symbol
endif
end if
end if
if(isScalar(line) .or. isFlow(line)) then
flow(s_flow:s_flow+1) = ', '
s_flow = s_flow +2
endif
end do
s_flow = s_flow - 1
if (flow(s_flow-1:s_flow-1) == ',') s_flow = s_flow - 1
end subroutine lst
!--------------------------------------------------------------------------------------------------
! @brief convert a yaml dict in block style to a yaml dict in flow style
! @details enters the function when encountered with the dictionary indicator ':'
! parses each line in the block and compares indentation of a line with the preceding line
! upon increase in indentation level -> 'decide' function decides if the line is a list or dict
! decrease in indentation indicates the end of an indentation block
!--------------------------------------------------------------------------------------------------
recursive subroutine dct(blck,flow,s_blck,s_flow,offset)
character(len=*), intent(in) :: blck !< YAML in mixed style
character(len=*), intent(inout) :: flow !< YAML in flow style only
integer, intent(inout) :: s_blck, & !< start position in blck
s_flow, & !< start position in flow
offset
character(len=pStringLen) :: line
integer :: e_blck,indent
logical :: previous_isKey
previous_isKey = .false.
indent = indentDepth(blck(s_blck:),offset)
do while (s_blck <= len_trim(blck))
e_blck = s_blck + index(blck(s_blck:),IO_EOL) - 2
line = IO_rmComment(blck(s_blck:e_blck))
if (len_trim(line) == 0) then
s_blck = e_blck + 2 ! forward to next line
cycle
elseif(indentDepth(line,offset) < indent) then
if(isScalar(line) .or. isFlow(line) .and. previous_isKey) &
call IO_error(701,ext_msg=line)
offset = 0
exit ! job done (lower level)
elseif(indentDepth(line,offset) > indent .or. isListItem(line)) then
offset = 0
call decide(blck,flow,s_blck,s_flow,offset)
else
if(isScalar(line)) call IO_error(701,ext_msg=line)
if(isFlow(line)) call IO_error(702,ext_msg=line)
line = line(indentDepth(line)+1:)
if(previous_isKey) then
flow(s_flow-1:s_flow) = ', '
s_flow = s_flow + 1
endif
if(isKeyValue(line)) then
call keyValue_toFlow(flow,s_flow,line)
else
call line_toFlow(flow,s_flow,line)
endif
s_blck = e_blck +2
end if
if(isScalar(line) .or. isKeyValue(line)) then
flow(s_flow:s_flow) = ','
s_flow = s_flow + 1
previous_isKey = .false.
else
previous_isKey = .true.
endif
flow(s_flow:s_flow) = ' '
s_flow = s_flow + 1
offset = 0
end do
s_flow = s_flow - 1
if (flow(s_flow-1:s_flow-1) == ',') s_flow = s_flow - 1
end subroutine dct
!--------------------------------------------------------------------------------------------------
! @brief decide whether next block is list or dict
!--------------------------------------------------------------------------------------------------
recursive subroutine decide(blck,flow,s_blck,s_flow,offset)
character(len=*), intent(in) :: blck !< YAML in mixed style
character(len=*), intent(inout) :: flow !< YAML in flow style only
integer, intent(inout) :: s_blck, & !< start position in blck
s_flow, & !< start position in flow
offset
integer :: e_blck
character(len=pStringLen) :: line
if(s_blck <= len(blck)) then
e_blck = s_blck + index(blck(s_blck:),IO_EOL) - 2
line = IO_rmComment(blck(s_blck:e_blck))
! exit here if '---' is found
if (isListItem(line)) then
flow(s_flow:s_flow) = '['
s_flow = s_flow + 1
call lst(blck,flow,s_blck,s_flow,offset)
flow(s_flow:s_flow) = ']'
s_flow = s_flow + 1
elseif(isKey(line) .or. isKeyValue(line)) then
flow(s_flow:s_flow) = '{'
s_flow = s_flow + 1
call dct(blck,flow,s_blck,s_flow,offset)
flow(s_flow:s_flow) = '}'
s_flow = s_flow + 1
elseif(isFlow(line)) then
call line_isFlow(flow,s_flow,line)
s_blck = e_blck +2
else
line = line(indentDepth(line)+1:)
call line_toFlow(flow,s_flow,line)
s_blck = e_blck +2
endif
endif
end subroutine
!--------------------------------------------------------------------------------------------------
! @brief convert all block style YAML parts to flow style
!--------------------------------------------------------------------------------------------------
function to_flow(blck)
character(len=:), allocatable :: to_flow
character(len=*), intent(in) :: blck !< YAML mixed style
integer :: s_blck, & !< start position in blck
s_flow, & !< start position in flow
offset, & !< counts leading '- ' in nested lists
end_line
if(isFlow(blck)) then
to_flow = trim(adjustl(blck))
else
allocate(character(len=len(blck)*2)::to_flow)
! move forward here (skip empty lines) and remove '----' if found
s_flow = 1
s_blck = 1
offset = 0
call decide(blck,to_flow,s_blck,s_flow,offset)
to_flow = trim(to_flow(:s_flow-1))
endif
end_line = index(to_flow,new_line(''))
if(end_line > 0) to_flow = to_flow(:end_line-1)
end function to_flow
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!--------------------------------------------------------------------------------------------------
subroutine selfTest()
if (indentDepth(' a') /= 1) call IO_error(0,ext_msg='indentDepth')
if (indentDepth('a') /= 0) call IO_error(0,ext_msg='indentDepth')
if (indentDepth('x ') /= 0) call IO_error(0,ext_msg='indentDepth')
if ( isFlow(' a')) call IO_error(0,ext_msg='isFLow')
if (.not. isFlow('{')) call IO_error(0,ext_msg='isFlow')
if (.not. isFlow(' [')) call IO_error(0,ext_msg='isFlow')
if ( isListItem(' a')) call IO_error(0,ext_msg='isListItem')
if (.not. isListItem('- a ')) call IO_error(0,ext_msg='isListItem')
if (.not. isListItem(' -b')) call IO_error(0,ext_msg='isListItem')
if ( isKeyValue(' a')) call IO_error(0,ext_msg='isKeyValue')
if ( isKeyValue(' a: ')) call IO_error(0,ext_msg='isKeyValue')
if (.not. isKeyValue(' a: b')) call IO_error(0,ext_msg='isKeyValue')
if ( isKey(' a')) call IO_error(0,ext_msg='isKey')
if ( isKey('{a:b}')) call IO_error(0,ext_msg='isKey')
if ( isKey(' a:b')) call IO_error(0,ext_msg='isKey')
if (.not. isKey(' a: ')) call IO_error(0,ext_msg='isKey')
if (.not. isKey(' a:')) call IO_error(0,ext_msg='isKey')
if (.not. isKey(' a: #')) call IO_error(0,ext_msg='isKey')
if( isScalar('a: ')) call IO_error(0,ext_msg='isScalar')
if( isScalar('a: b')) call IO_error(0,ext_msg='isScalar')
if( isScalar('{a:b}')) call IO_error(0,ext_msg='isScalar')
if( isScalar('- a:')) call IO_error(0,ext_msg='isScalar')
if(.not. isScalar(' a')) call IO_error(0,ext_msg='isScalar')
basic_list: block
character(len=*), parameter :: block_list = &
" - Casablanca"//IO_EOL//&
" - North by Northwest"//IO_EOL
character(len=*), parameter :: block_list_newline = &
" -"//IO_EOL//&
" Casablanca"//IO_EOL//&
" -"//IO_EOL//&
" North by Northwest"//IO_EOL
character(len=*), parameter :: flow_list = &
"[Casablanca, North by Northwest]"
if (.not. to_flow(block_list) == flow_list) call IO_error(0,ext_msg='to_flow')
if (.not. to_flow(block_list_newline) == flow_list) call IO_error(0,ext_msg='to_flow')
end block basic_list
basic_dict: block
character(len=*), parameter :: block_dict = &
" aa: Casablanca"//IO_EOL//&
" bb: North by Northwest"//IO_EOL
character(len=*), parameter :: block_dict_newline = &
" aa:"//IO_EOL//&
" Casablanca"//IO_EOL//&
" bb:"//IO_EOL//&
" North by Northwest"//IO_EOL
character(len=*), parameter :: flow_dict = &
"{aa: Casablanca, bb: North by Northwest}"
if (.not. to_flow(block_dict) == flow_dict) call IO_error(0,ext_msg='to_flow')
if (.not. to_flow(block_dict_newline) == flow_dict) call IO_error(0,ext_msg='to_flow')
end block basic_dict
basic_flow: block
character(len=*), parameter :: flow_braces = &
" source: [{param: 1}, {param: 2}, {param: 3}, {param: 4}]"//IO_EOL
character(len=*), parameter :: flow_mixed_braces = &
" source: [param: 1, {param: 2}, param: 3, {param: 4}]"//IO_EOL
character(len=*), parameter :: flow = &
"{source: [{param: 1}, {param: 2}, {param: 3}, {param: 4}]}"
if (.not. to_flow(flow_braces) == flow) call IO_error(0,ext_msg='to_flow')
if (.not. to_flow(flow_mixed_braces) == flow) call IO_error(0,ext_msg='to_flow')
end block basic_flow
basic_mixed: block
character(len=*), parameter :: block_flow = &
" aa:"//IO_EOL//&
" - "//IO_EOL//&
" param_1: [a: b, c, {d: {e: [f: g, h]}}]"//IO_EOL//&
" - c: d"//IO_EOL//&
" bb:"//IO_EOL//&
" - {param_1: [{a: b}, c, {d: {e: [{f: g}, h]}}]}"//IO_EOL
character(len=*), parameter :: mixed_flow = &
"{aa: [{param_1: [{a: b}, c, {d: {e: [{f: g}, h]}}]}, {c: d}], bb: [{param_1: [{a: b}, c, {d: {e: [{f: g}, h]}}]}]}"
if(.not. to_flow(block_flow) == mixed_flow) call IO_error(0,ext_msg='to_flow')
end block basic_mixed
end subroutine selfTest
end module YAML_parse