string_to_value Interface

public interface string_to_value

Contents

Module Procedures


Module Procedures

private subroutine a2d(chars, valu, ierr, onerr)

Arguments

Type IntentOptional Attributes Name
character(len=*), intent(in) :: chars
doubleprecision, intent(out) :: valu
integer, intent(out) :: ierr
class(*), intent(in), optional :: onerr

private subroutine a2r(chars, valu, ierr)

NAME

  string_to_value(3f) - [M_strings:TYPE] subroutine returns numeric
  value from string
  (LICENSE:PD)

SYNOPSIS

subroutine string_to_value(chars,valu,ierr)

 character(len=*),intent(in)              :: chars   ! input string
 integer|real|doubleprecision,intent(out) :: valu
 integer,intent(out)                      :: ierr

DESCRIPTION

Returns a numeric value from a numeric character string.

Works with any g-format input, including integer, real, and
exponential. If the input string begins with "B", "Z", or "O"
and otherwise represents a positive whole number it is assumed to
be a binary, hexadecimal, or octal value. If the string contains
commas they are removed. If the string is of the form NN:MMM... or
NN#MMM then NN is assumed to be the base of the whole number.

If an error occurs in the READ, IOSTAT is returned in IERR and
value is set to zero. if no error occurs, IERR=0.

OPTIONS

   CHARS  input string to read numeric value from

RETURNS

VALU   numeric value returned. May be INTEGER, REAL, or
          DOUBLEPRECISION.
IERR   error flag (0 == no error)

EXAMPLE

Sample Program:

program demo_string_to_value
 use M_strings, only: string_to_value
 implicit none
 real :: value
 integer :: ierr
 character(len=80) :: string
    string=' -40.5e-2 '
    call string_to_value(string,value,ierr)
    write(*,*) 'value of string ['//trim(string)//'] is ',value
end program demo_string_to_value

AUTHOR

John S. Urban

LICENSE

Public Domain

Arguments

Type IntentOptional Attributes Name
character(len=*), intent(in) :: chars
real, intent(out) :: valu
integer, intent(out) :: ierr

private subroutine a2i(chars, valu, ierr)

Arguments

Type IntentOptional Attributes Name
character(len=*), intent(in) :: chars
integer, intent(out) :: valu
integer, intent(out) :: ierr