Arguments

 

destination-string

   OpenVMS usage:char_string
   type:         character string
   access:       write only
   mechanism:    by descriptor

   Destination string into which STR$POS_EXTR copies the substring.
   The destination-string argument is the address of a descriptor
   pointing to the destination string.
 

source-string

   OpenVMS usage:char_string
   type:         character string
   access:       read only
   mechanism:    by descriptor

   Source string from which STR$POS_EXTR extracts the substring that
   it copies into the destination string. The source-string argument
   is the address of a descriptor pointing to the source string.
 

start-position

   OpenVMS usage:longword_signed
   type:         longword (signed)
   access:       read only
   mechanism:    by reference for CALL entry point, by value for JSB
                 entry point

   Relative position in the source string at which STR$POS_EXTR
   begins copying the substring. The start-position argument is the
   address of a signed longword containing the starting position.
 

end-position

   OpenVMS usage:longword_signed
   type:         longword (signed)
   access:       read only
   mechanism:    by reference for CALL entry point, by value for JSB
                 entry point

   Relative position in the source string at which STR$POS_EXTR
   stops copying the substring. The end-position argument is the
   address of a signed longword containing the ending position.