DAMASK_EICMD/src/YAML_parse.f90

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!----------------------------------------------------------------------------------------------------
!> @author Martin Diehl, Max-Planck-Institut für Eisenforschung GmbH
!> @author Sharan Roongta, Max-Planck-Institut für Eisenforschung GmbH
!> @brief Parser for YAML files.
!> @details Module converts a YAML input file to an equivalent YAML flow style which is then parsed.
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!----------------------------------------------------------------------------------------------------
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module YAML_parse
use prec
use misc
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use IO
use YAML_types
#ifdef FYAML
use system_routines
#endif
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implicit none(type,external)
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private
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public :: &
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YAML_parse_init, &
YAML_parse_str_asList, &
YAML_parse_str_asDict
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#ifdef FYAML
interface
subroutine to_flow_C(flow,length_flow,mixed) bind(C)
use, intrinsic :: ISO_C_Binding, only: C_LONG, C_CHAR, C_PTR
implicit none(type,external)
type(C_PTR), intent(out) :: flow
integer(C_LONG), intent(out) :: length_flow
character(kind=C_CHAR), dimension(*), intent(in) :: mixed
end subroutine to_flow_C
end interface
#endif
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contains
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!--------------------------------------------------------------------------------------------------
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!> @brief Do sanity checks.
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!--------------------------------------------------------------------------------------------------
subroutine YAML_parse_init()
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print'(/,1x,a)', '<<<+- YAML_parse init -+>>>'
#ifdef FYAML
print'(/,1x,a)', 'libfyaml powered'
#else
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call YAML_parse_selfTest()
#endif
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end subroutine YAML_parse_init
!--------------------------------------------------------------------------------------------------
!> @brief Parse a YAML string with list at root into a structure of nodes.
!> @details The string needs to end with a newline (unless using libfyaml).
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!--------------------------------------------------------------------------------------------------
function YAML_parse_str_asList(str) result(list)
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character(len=*), intent(in) :: str
type(tList), pointer :: list
class(tNode), pointer :: node
node => parse_flow(to_flow(str))
list => node%asList()
end function YAML_parse_str_asList
!--------------------------------------------------------------------------------------------------
!> @brief Parse a YAML string with dict at root into a structure of nodes.
!> @details The string needs to end with a newline (unless using libfyaml).
!--------------------------------------------------------------------------------------------------
function YAML_parse_str_asDict(str) result(dict)
character(len=*), intent(in) :: str
type(tDict), pointer :: dict
class(tNode), pointer :: node
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node => parse_flow(to_flow(str))
dict => node%asDict()
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end function YAML_parse_str_asDict
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!--------------------------------------------------------------------------------------------------
!> @brief Read a string in flow style and store 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.
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!--------------------------------------------------------------------------------------------------
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recursive function parse_flow(YAML_flow) result(node)
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character(len=*), intent(in) :: YAML_flow !< YAML file in flow style
class(tNode), pointer :: node
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class(tNode), pointer :: &
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myVal
character(len=:), allocatable :: &
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flow_string, &
key
integer(pI64) :: &
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e, & ! end position of dictionary or list
s, & ! start position of dictionary or list
d ! position of key: value separator (':')
flow_string = trim(adjustl(YAML_flow))
if (len_trim(flow_string,pI64) == 0_pI64) then
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node => emptyDict
return
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elseif (flow_string(1:1) == '{') then ! start of a dictionary
e = 1_pI64
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allocate(tDict::node)
do while (e < len_trim(flow_string,pI64))
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s = e
d = s + scan(flow_string(s+1_pI64:),':',kind=pI64)
e = d + find_end(flow_string(d+1_pI64:),'}')
key = trim(adjustl(flow_string(s+1_pI64:d-1_pI64)))
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if (quotedStr(key)) key = key(2:len(key)-1)
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myVal => parse_flow(flow_string(d+1_pI64:e-1_pI64)) ! parse items (recursively)
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select type (node)
class is (tDict)
call node%set(key,myVal)
end select
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end do
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elseif (flow_string(1:1) == '[') then ! start of a list
e = 1_pI64
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allocate(tList::node)
do while (e < len_trim(flow_string,pI64))
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s = e
e = s + find_end(flow_string(s+1_pI64:),']')
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myVal => parse_flow(flow_string(s+1_pI64:e-1_pI64)) ! parse items (recursively)
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select type (node)
class is (tList)
call node%append(myVal)
end select
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end do
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else ! scalar value
allocate(tScalar::node)
select type (node)
class is (tScalar)
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if (quotedStr(flow_string)) then
node = trim(adjustl(flow_string(2:len(flow_string)-1)))
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else
node = trim(adjustl(flow_string))
end if
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end select
end if
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end function parse_flow
!--------------------------------------------------------------------------------------------------
!> @brief Find location of chunk end: ',' '}', or ']'.
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!> @details leaves nested lists ( '[...]' and dicts '{...}') intact
!--------------------------------------------------------------------------------------------------
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integer(pI64) function find_end(str,e_char)
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character(len=*), intent(in) :: str !< chunk of YAML flow string
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character, intent(in) :: e_char !< end of list/dict ( '}' or ']')
integer(pI64) :: N_sq, & !< number of open square brackets
N_cu, & !< number of open curly brackets
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i
N_sq = 0_pI64
N_cu = 0_pI64
i = 1_pI64
do while(i<=len_trim(str,pI64))
if (scan(str(i:i),IO_QUOTES,kind=pI64) == 1_pI64) i = i + scan(str(i+1:),str(i:i),kind=pI64)
if (N_sq==0 .and. N_cu==0 .and. scan(str(i:i),e_char//',',kind=pI64) == 1_pI64) exit
N_sq = N_sq + merge(1_pI64,0_pI64,str(i:i) == '[')
N_cu = N_cu + merge(1_pI64,0_pI64,str(i:i) == '{')
N_sq = N_sq - merge(1_pI64,0_pI64,str(i:i) == ']')
N_cu = N_cu - merge(1_pI64,0_pI64,str(i:i) == '}')
i = i + 1_pI64
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end do
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find_end = i
end function find_end
!--------------------------------------------------------------------------------------------------
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! @brief Check whether a string is enclosed with single or double quotes.
!--------------------------------------------------------------------------------------------------
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logical function quotedStr(line)
character(len=*), intent(in) :: line
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quotedStr = .false.
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if (len(line) == 0) return
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if (scan(line(:1),IO_QUOTES) == 1) then
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quotedStr = .true.
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if (line(len(line):len(line)) /= line(:1)) call IO_error(710,ext_msg=line)
end if
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end function quotedStr
#ifdef FYAML
!--------------------------------------------------------------------------------------------------
! @brief Convert all block-style YAML parts to flow style.
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!--------------------------------------------------------------------------------------------------
function to_flow(mixed) result(flow)
character(len=*), intent(in) :: mixed
character(:,C_CHAR), allocatable :: flow
type(C_PTR) :: str_ptr
integer(C_LONG) :: strlen
call to_flow_C(str_ptr,strlen,f_c_string(mixed))
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if (strlen < 1_C_LONG) call IO_error(703,ext_msg='libyfaml')
allocate(character(len=strlen,kind=c_char) :: flow)
block
character(len=strlen,kind=c_char), pointer :: s
call c_f_pointer(str_ptr,s)
flow = s(:len(s,pI64)-1_pI64)
end block
call free_C(str_ptr)
end function to_flow
#else
!--------------------------------------------------------------------------------------------------
! @brief Determine indentation depth.
! @details Indentation level is determined for a given block/line.
! In case of nested lists, an offset is added to determine the indent of the item block (skip
! leading dashes).
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!--------------------------------------------------------------------------------------------------
integer function indentDepth(line,offset)
character(len=*), intent(in) :: line
integer, optional,intent(in) :: offset
indentDepth = verify(line,IO_WHITESPACE) - 1 + misc_optional(offset,0)
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end function indentDepth
!--------------------------------------------------------------------------------------------------
! @brief Check whether a string is in flow style, i.e. starts with '{' or '['.
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!--------------------------------------------------------------------------------------------------
logical function isFlow(line)
character(len=*), intent(in) :: line
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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.
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!--------------------------------------------------------------------------------------------------
logical function isScalar(line)
character(len=*), intent(in) :: line
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isScalar = (.not. isKeyValue(line) .and. &
.not. isKey(line) .and. &
.not. isListItem(line) .and. &
.not. isFlow(line))
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end function isScalar
!--------------------------------------------------------------------------------------------------
! @brief Check whether a string is a list item, i.e. starts with '-'.
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!--------------------------------------------------------------------------------------------------
logical function isListItem(line)
character(len=*), intent(in) :: line
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isListItem = .false.
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if (len_trim(adjustl(line))> 2 .and. index(trim(adjustl(line)), '-') == 1) then
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isListItem = scan(trim(adjustl(line)),' ') == 2
else
isListItem = trim(adjustl(line)) == '-'
end if
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end function isListItem
!--------------------------------------------------------------------------------------------------
! @brief Check whether a string contains a key-value pair of the form '<key>: <value>'.
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!--------------------------------------------------------------------------------------------------
logical function isKeyValue(line)
character(len=*), intent(in) :: line
isKeyValue = .false.
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if ( .not. isKey(line) .and. index(IO_rmComment(line),':') > 0 .and. .not. isFlow(line)) then
if (index(IO_rmComment(line),': ') > 0) isKeyValue = .true.
end if
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end function isKeyValue
!--------------------------------------------------------------------------------------------------
! @brief Check whether a string contains a key without a value, i.e. it ends in ':'.
! ToDo: check whether this is safe for trailing spaces followed by a newline character
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!--------------------------------------------------------------------------------------------------
logical function isKey(line)
character(len=*), intent(in) :: line
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if (len(IO_rmComment(line)) == 0) then
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isKey = .false.
else
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isKey = index(IO_rmComment(line),':',back=.false.) == len(IO_rmComment(line)) .and. &
index(IO_rmComment(line),':',back=.true.) == len(IO_rmComment(line)) .and. &
.not. isFlow(line)
end if
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end function isKey
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!--------------------------------------------------------------------------------------------------
! @brief Check whether a string is a list in flow style.
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!--------------------------------------------------------------------------------------------------
logical function isFlowList(line)
character(len=*), intent(in) :: line
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isFlowList = index(adjustl(line),'[') == 1
end function isFlowList
!--------------------------------------------------------------------------------------------------
! @brief Skip empty lines.
! @details Update start position in the block by skipping empty lines if present.
!--------------------------------------------------------------------------------------------------
subroutine skip_empty_lines(blck,s_blck)
character(len=*), intent(in) :: blck
integer, intent(inout) :: s_blck
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logical :: empty
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empty = .true.
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do while (empty .and. len_trim(blck(s_blck:)) /= 0)
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empty = len_trim(IO_rmComment(blck(s_blck:s_blck + index(blck(s_blck:),IO_EOL) - 2))) == 0
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if (empty) s_blck = s_blck + index(blck(s_blck:),IO_EOL)
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end do
end subroutine skip_empty_lines
!--------------------------------------------------------------------------------------------------
! @brief Skip file header.
! @details Update start position in the block by skipping file header if present.
!--------------------------------------------------------------------------------------------------
subroutine skip_file_header(blck,s_blck)
character(len=*), intent(in) :: blck
integer, intent(inout) :: s_blck
character(len=:), allocatable :: line
line = IO_rmComment(blck(s_blck:s_blck + index(blck(s_blck:),IO_EOL) - 2))
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if (index(adjustl(line),'%YAML') == 1) then
s_blck = s_blck + index(blck(s_blck:),IO_EOL)
call skip_empty_lines(blck,s_blck)
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if (trim(IO_rmComment(blck(s_blck:s_blck + index(blck(s_blck:),IO_EOL) - 2))) == '---') then
s_blck = s_blck + index(blck(s_blck:),IO_EOL)
else
call IO_error(708,ext_msg = line)
end if
end if
end subroutine skip_file_header
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!--------------------------------------------------------------------------------------------------
!> @brief Check whether a line in flow style starts and ends on the same line.
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!--------------------------------------------------------------------------------------------------
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logical function flow_is_closed(str,e_char)
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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
character(len=:), allocatable:: line
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flow_is_closed = .false.
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N_sq = 0
N_cu = 0
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if (e_char == ']') line = str(index(str(:),'[')+1:)
if (e_char == '}') line = str(index(str(:),'{')+1:)
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do i = 1, len_trim(line)
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flow_is_closed = (N_sq==0 .and. N_cu==0 .and. scan(line(i:i),e_char) == 1)
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N_sq = N_sq + merge(1,0,line(i:i) == '[')
N_cu = N_cu + merge(1,0,line(i:i) == '{')
N_sq = N_sq - merge(1,0,line(i:i) == ']')
N_cu = N_cu - merge(1,0,line(i:i) == '}')
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end do
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end function flow_is_closed
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!--------------------------------------------------------------------------------------------------
!> @brief Return a flow-style line without line break.
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!--------------------------------------------------------------------------------------------------
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subroutine remove_line_break(blck,s_blck,e_char,flow_line)
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character(len=*), intent(in) :: blck !< YAML in mixed style
integer, intent(inout) :: s_blck
character, intent(in) :: e_char !< end of list/dict ( '}' or ']')
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character(len=:), allocatable, intent(out) :: flow_line
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logical :: line_end
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line_end = .false.
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flow_line = ''
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do while (.not. line_end)
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flow_line = flow_line//IO_rmComment(blck(s_blck:s_blck + index(blck(s_blck:),IO_EOL) - 2))//' '
line_end = flow_is_closed(flow_line,e_char)
s_blck = s_blck + index(blck(s_blck:),IO_EOL)
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end do
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end subroutine remove_line_break
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!--------------------------------------------------------------------------------------------------
!> @brief Return a scalar list item without line break.
!--------------------------------------------------------------------------------------------------
subroutine list_item_inline(blck,s_blck,inline,offset)
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character(len=*), intent(in) :: blck !< YAML in mixed style
integer, intent(inout) :: s_blck
character(len=:), allocatable, intent(out) :: inline
integer, intent(inout) :: offset
character(len=:), allocatable :: line
integer :: indent,indent_next
indent = indentDepth(blck(s_blck:),offset)
line = IO_rmComment(blck(s_blck:s_blck + index(blck(s_blck:),IO_EOL) - 2))
inline = line(indent-offset+3:)
s_blck = s_blck + index(blck(s_blck:),IO_EOL)
indent_next = indentDepth(blck(s_blck:))
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do while (indent_next > indent)
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inline = inline//' '//trim(adjustl(IO_rmComment(blck(s_blck:s_blck + index(blck(s_blck:),IO_EOL) - 2))))
s_blck = s_blck + index(blck(s_blck:),IO_EOL)
indent_next = indentDepth(blck(s_blck:))
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end do
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if (scan(inline,",") > 0) inline = '"'//inline//'"'
end subroutine list_item_inline
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!--------------------------------------------------------------------------------------------------
! @brief Read a line of YAML block that is already in flow style.
! @details A dict should be enclosed within '{}' for it to be consistent with the DAMASK YAML parser.
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!--------------------------------------------------------------------------------------------------
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
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integer :: &
s, &
list_chunk, &
dict_chunk
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if (index(adjustl(line),'[') == 1) then
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s = index(line,'[')
flow(s_flow:s_flow) = '['
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s_flow = s_flow+1
do while (s < len_trim(line))
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list_chunk = s + find_end(line(s+1:),']')
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if (iskeyValue(line(s+1:list_chunk-1))) then
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flow(s_flow:s_flow) = '{'
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s_flow = s_flow+1
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call keyValue_toFlow(flow,s_flow,line(s+1:list_chunk-1))
flow(s_flow:s_flow) = '}'
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s_flow = s_flow+1
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elseif (isFlow(line(s+1:list_chunk-1))) then
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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))
end if
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flow(s_flow:s_flow+1) = ', '
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s_flow = s_flow+2
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s = s + find_end(line(s+1:),']')
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end do
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s_flow = s_flow-1
if (flow(s_flow-1:s_flow-1) == ',') s_flow = s_flow-1
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flow(s_flow:s_flow) = ']'
s_flow = s_flow+1
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elseif (index(adjustl(line),'{') == 1) then
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s = index(line,'{')
flow(s_flow:s_flow) = '{'
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s_flow = s_flow+1
do while (s < len_trim(line))
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dict_chunk = s + find_end(line(s+1:),'}')
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if (.not. iskeyValue(line(s+1:dict_chunk-1))) call IO_error(705,ext_msg=line)
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call keyValue_toFlow(flow,s_flow,line(s+1:dict_chunk-1))
flow(s_flow:s_flow+1) = ', '
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s_flow = s_flow+2
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s = s + find_end(line(s+1:),'}')
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end do
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s_flow = s_flow-1
if (flow(s_flow-1:s_flow-1) == ',') s_flow = s_flow-1
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flow(s_flow:s_flow) = '}'
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s_flow = s_flow+1
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else
call line_toFlow(flow,s_flow,line)
end if
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end subroutine line_isFlow
!-------------------------------------------------------------------------------------------------
! @brief Transform a line of YAML of type <key>: <value> to flow style.
! @details Ensures that the <value> is consistent with the input required in the DAMASK YAML parser.
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!-------------------------------------------------------------------------------------------------
recursive subroutine keyValue_toFlow(flow,s_flow,line)
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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>
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integer :: &
d_flow, &
col_pos, &
offset_value
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col_pos = index(line,':')
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if (line(col_pos+1:col_pos+1) /= ' ') call IO_error(704,ext_msg=line)
if (isFlow(line(col_pos+1:))) then
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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)
end if
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end subroutine keyValue_toFlow
!-------------------------------------------------------------------------------------------------
! @brief Transform a line of YAML to flow style.
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!-------------------------------------------------------------------------------------------------
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
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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 Transform a block-style list to flow style.
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! @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
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! Call the 'decide' function if there is an increase in the indentation level or the list item is not a scalar
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! 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=:), allocatable :: line,flow_line,inline
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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))
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if (trim(line) == '---' .or. trim(line) == '...') then
exit
elseif (len_trim(line) == 0) then
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s_blck = e_blck + 2 ! forward to next line
cycle
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elseif (indentDepth(line,offset) > indent) then
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call decide(blck,flow,s_blck,s_flow,offset)
offset = 0
flow(s_flow:s_flow+1) = ', '
s_flow = s_flow + 2
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elseif (indentDepth(line,offset) < indent .or. .not. isListItem(line)) then
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offset = 0
exit ! job done (lower level)
else
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if (trim(adjustl(line)) == '-') then ! list item in next line
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s_blck = e_blck + 2
call skip_empty_lines(blck,s_blck)
e_blck = s_blck + index(blck(s_blck:),IO_EOL) - 2
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line = IO_rmComment(blck(s_blck:e_blck))
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if (trim(line) == '---') call IO_error(707,ext_msg=line)
if (indentDepth(line) < indent .or. indentDepth(line) == indent) &
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call IO_error(701,ext_msg=line)
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if (isScalar(line)) then
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call line_toFlow(flow,s_flow,line)
s_blck = e_blck +2
offset = 0
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elseif (isFlow(line)) then
if (isFlowList(line)) then
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call remove_line_break(blck,s_blck,']',flow_line)
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else
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call remove_line_break(blck,s_blck,'}',flow_line)
end if
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call line_isFlow(flow,s_flow,flow_line)
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offset = 0
end if
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else ! list item in the same line
line = line(indentDepth(line)+3:)
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if (isScalar(line)) then
call list_item_inline(blck,s_blck,inline,offset)
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offset = 0
call line_toFlow(flow,s_flow,inline)
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elseif (isFlow(line)) then
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s_blck = s_blck + index(blck(s_blck:),'-')
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if (isFlowList(line)) then
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call remove_line_break(blck,s_blck,']',flow_line)
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else
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call remove_line_break(blck,s_blck,'}',flow_line)
end if
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call line_isFlow(flow,s_flow,flow_line)
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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
end if
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end if
end if
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if (isScalar(line) .or. isFlow(line)) then
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flow(s_flow:s_flow+1) = ', '
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s_flow = s_flow+2
end if
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end do
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s_flow = s_flow-1
if (flow(s_flow-1:s_flow-1) == ',') s_flow = s_flow-1
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end subroutine lst
!--------------------------------------------------------------------------------------------------
! @brief Transform a block-style dict to flow style.
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! @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
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character(len=:), allocatable :: line,flow_line
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integer :: e_blck,indent,col_pos
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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))
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if (trim(line) == '---' .or. trim(line) == '...') then
exit
elseif (len_trim(line) == 0) then
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s_blck = e_blck + 2 ! forward to next line
cycle
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elseif (indentDepth(line,offset) < indent) then
if (isScalar(line) .or. isFlow(line) .and. previous_isKey) &
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call IO_error(701,ext_msg=line)
offset = 0
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exit ! job done (lower level)
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elseif (indentDepth(line,offset) > indent .or. isListItem(line)) then
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offset = 0
call decide(blck,flow,s_blck,s_flow,offset)
else
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if (isScalar(line)) call IO_error(701,ext_msg=line)
if (isFlow(line)) call IO_error(702,ext_msg=line)
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line = line(indentDepth(line)+1:)
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if (previous_isKey) then
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flow(s_flow-1:s_flow) = ', '
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s_flow = s_flow+1
end if
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if (isKeyValue(line)) then
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col_pos = index(line,':')
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if (isFlow(line(col_pos+1:))) then
if (isFlowList(line(col_pos+1:))) then
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call remove_line_break(blck,s_blck,']',flow_line)
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else
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call remove_line_break(blck,s_blck,'}',flow_line)
end if
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call keyValue_toFlow(flow,s_flow,flow_line)
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else
call keyValue_toFlow(flow,s_flow,line)
s_blck = e_blck + 2
end if
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else
call line_toFlow(flow,s_flow,line)
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s_blck = e_blck + 2
end if
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end if
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if (isScalar(line) .or. isKeyValue(line)) then
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flow(s_flow:s_flow) = ','
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s_flow = s_flow+1
previous_isKey = .false.
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else
previous_isKey = .true.
end if
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flow(s_flow:s_flow) = ' '
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s_flow = s_flow+1
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offset = 0
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end do
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s_flow = s_flow-1
if (flow(s_flow-1:s_flow-1) == ',') s_flow = s_flow-1
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end subroutine dct
!--------------------------------------------------------------------------------------------------
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! @brief Decide whether next block is list or dict.
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!--------------------------------------------------------------------------------------------------
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
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character(len=:), allocatable :: line,flow_line
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if (s_blck <= len(blck)) then
call skip_empty_lines(blck,s_blck)
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e_blck = s_blck + index(blck(s_blck:),IO_EOL) - 2
line = IO_rmComment(blck(s_blck:e_blck))
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if (trim(line) == '---' .or. trim(line) == '...') then
continue ! end parsing at this point but not stop the simulation
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elseif (len_trim(line) == 0) then
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s_blck = e_blck + 2
call decide(blck,flow,s_blck,s_flow,offset)
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elseif (isListItem(line)) then
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flow(s_flow:s_flow) = '['
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s_flow = s_flow+1
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call lst(blck,flow,s_blck,s_flow,offset)
flow(s_flow:s_flow) = ']'
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s_flow = s_flow+1
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elseif (isKey(line) .or. isKeyValue(line)) then
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flow(s_flow:s_flow) = '{'
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s_flow = s_flow+1
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call dct(blck,flow,s_blck,s_flow,offset)
flow(s_flow:s_flow) = '}'
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s_flow = s_flow+1
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elseif (isFlow(line)) then
if (isFlowList(line)) then
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call remove_line_break(blck,s_blck,']',flow_line)
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else
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call remove_line_break(blck,s_blck,'}',flow_line)
end if
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call line_isFlow(flow,s_flow,line)
else
line = line(indentDepth(line)+1:)
call line_toFlow(flow,s_flow,line)
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s_blck = e_blck + 2
end if
end if
2020-05-22 00:11:40 +05:30
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end subroutine decide
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!--------------------------------------------------------------------------------------------------
!> @brief Convert all block-style parts to flow style.
!> @details The input needs to end with a newline.
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!--------------------------------------------------------------------------------------------------
function to_flow(blck)
character(len=:), allocatable :: to_flow
character(len=*), intent(in) :: blck !< YAML mixed style
character(len=:), allocatable :: line
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integer :: s_blck, & !< start position in blck
s_flow, & !< start position in flow
offset, & !< counts leading '- ' in nested lists
end_line
allocate(character(len=len(blck)*2)::to_flow)
s_flow = 1
s_blck = 1
offset = 0
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if (len_trim(blck) /= 0) then
call skip_empty_lines(blck,s_blck)
call skip_file_header(blck,s_blck)
line = IO_rmComment(blck(s_blck:s_blck + index(blck(s_blck:),IO_EOL) - 2))
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if (trim(line) == '---') s_blck = s_blck + index(blck(s_blck:),IO_EOL)
call decide(blck,to_flow,s_blck,s_flow,offset)
end if
line = IO_rmComment(blck(s_blck:s_blck+index(blck(s_blck:),IO_EOL)-2))
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if (trim(line)== '---') call IO_warning(709,ext_msg=line)
to_flow = trim(to_flow(:s_flow-1))
end_line = index(to_flow,IO_EOL)
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if (end_line > 0) to_flow = to_flow(:end_line-1)
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end function to_flow
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!--------------------------------------------------------------------------------------------------
!> @brief Check correctness of some YAML functions.
!--------------------------------------------------------------------------------------------------
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subroutine YAML_parse_selfTest()
if (indentDepth(' a') /= 1) error stop 'indentDepth'
if (indentDepth('a') /= 0) error stop 'indentDepth'
if (indentDepth('x ') /= 0) error stop 'indentDepth'
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if (.not. quotedStr("'a'")) error stop 'quotedStr'
if ( isFlow(' a')) error stop 'isFLow'
if (.not. isFlow('{')) error stop 'isFlow'
if (.not. isFlow(' [')) error stop 'isFlow'
if ( isListItem(' a')) error stop 'isListItem'
if ( isListItem(' -b')) error stop 'isListItem'
if (.not. isListItem('- a ')) error stop 'isListItem'
if (.not. isListItem('- -a ')) error stop 'isListItem'
if ( isKeyValue(' a')) error stop 'isKeyValue'
if ( isKeyValue(' a: ')) error stop 'isKeyValue'
if (.not. isKeyValue(' a: b')) error stop 'isKeyValue'
if ( isKey(' a')) error stop 'isKey'
if ( isKey('{a:b}')) error stop 'isKey'
if ( isKey(' a:b')) error stop 'isKey'
if (.not. isKey(' a: ')) error stop 'isKey'
if (.not. isKey(' a:')) error stop 'isKey'
if (.not. isKey(' a: #')) error stop 'isKey'
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if ( isScalar('a: ')) error stop 'isScalar'
if ( isScalar('a: b')) error stop 'isScalar'
if ( isScalar('{a:b}')) error stop 'isScalar'
if ( isScalar('- a:')) error stop 'isScalar'
if (.not. isScalar(' a')) error stop 'isScalar'
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basic_list: block
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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) error stop 'to_flow'
if (.not. to_flow(block_list_newline) == flow_list) error stop 'to_flow'
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end block basic_list
basic_dict: block
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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) error stop 'to_flow'
if (.not. to_flow(block_dict_newline) == flow_dict) error stop 'to_flow'
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end block basic_dict
only_flow: block
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character(len=*), parameter :: flow_dict = &
" {a: [b,c: {d: e}, f: g, e]}"//IO_EOL
character(len=*), parameter :: flow_list = &
" [a,b: c, d,e: {f: g}]"//IO_EOL
character(len=*), parameter :: flow_1 = &
"{a: [b, {c: {d: e}}, {f: g}, e]}"
character(len=*), parameter :: flow_2 = &
"[a, {b: c}, d, {e: {f: g}}]"
if (.not. to_flow(flow_dict) == flow_1) error stop 'to_flow'
if (.not. to_flow(flow_list) == flow_2) error stop 'to_flow'
end block only_flow
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basic_flow: block
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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) error stop 'to_flow'
if (.not. to_flow(flow_mixed_braces) == flow) error stop 'to_flow'
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end block basic_flow
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multi_line_flow1: block
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character(len=*), parameter :: flow_multi = &
'%YAML 1.1'//IO_EOL//&
'---'//IO_EOL//&
'a: ["b",'//IO_EOL//&
'c: '//IO_EOL//&
'"d", "e"]'//IO_EOL
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character(len=*), parameter :: flow = &
'{a: ["b", {c: "d"}, "e"]}'
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if ( .not. to_flow(flow_multi) == flow) error stop 'to_flow'
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end block multi_line_flow1
multi_line_flow2: block
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character(len=*), parameter :: flow_multi = &
"%YAML 1.1"//IO_EOL//&
"---"//IO_EOL//&
"-"//IO_EOL//&
" a: {b:"//IO_EOL//&
"[c,"//IO_EOL//&
"d"//IO_EOL//&
"e, f]}"//IO_EOL
character(len=*), parameter :: flow = &
"[{a: {b: [c, d e, f]}}]"
if ( .not. to_flow(flow_multi) == flow) error stop 'to_flow'
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end block multi_line_flow2
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basic_mixed: block
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character(len=*), parameter :: block_flow = &
"%YAML 1.1"//IO_EOL//&
" "//IO_EOL//&
" "//IO_EOL//&
"---"//IO_EOL//&
" aa:"//IO_EOL//&
" - "//IO_EOL//&
" "//IO_EOL//&
" "//IO_EOL//&
" param_1: [a: b, c, {d: {e: [f: g, h]}}]"//IO_EOL//&
" - c:d"//IO_EOL//&
" e.f,"//IO_EOL//&
" bb:"//IO_EOL//&
" "//IO_EOL//&
" - "//IO_EOL//&
" {param_1: [{a: b}, c, {d: {e: [{f: g}, h]}}]}"//IO_EOL//&
"..."//IO_EOL
character(len=*), parameter :: mixed_flow = &
'{aa: [{param_1: [{a: b}, c, {d: {e: [{f: g}, h]}}]}, "c:d e.f,"], bb: [{param_1: [{a: b}, c, {d: {e: [{f: g}, h]}}]}]}'
if (.not. to_flow(block_flow) == mixed_flow) error stop 'to_flow'
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end block basic_mixed
parse: block
type(tDict), pointer :: dict
type(tList), pointer :: list
character(len=*), parameter :: &
lst = '[1, 2, 3, 4]', &
dct = '{a: 1, b: 2}'
list => YAML_parse_str_asList(lst//IO_EOL)
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if (list%asFormattedStr() /= lst) error stop 'str_asList'
dict => YAML_parse_str_asDict(dct//IO_EOL)
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if (dict%asFormattedStr() /= dct) error stop 'str_asDict'
end block parse
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end subroutine YAML_parse_selfTest
#endif
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end module YAML_parse