Arguments

 

source-string

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

   String that STR$FIND_FIRST_SUBSTRING searches. The source-string
   argument is the address of a descriptor pointing to the string.
 

index

   OpenVMS usage:longword_signed
   type:         longword (signed)
   access:       write only
   mechanism:    by reference

   Earliest position within source-string at which STR$FIND_FIRST_
   SUBSTRING found a matching substring; zero if no matching
   substring was found. The index argument is the address of a
   signed longword containing this position.
 

substring-index

   OpenVMS usage:longword_signed
   type:         longword (signed)
   access:       write only
   mechanism:    by reference

   Ordinal number of the substring that matched (1 for the first, 2
   for the second, and so on), or zero if STR$FIND_FIRST_SUBSTRING
   found no substrings that matched. The substring-index argument is
   the address of a signed longword containing this ordinal number.
 

substring

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

   Specified substring for which STR$FIND_FIRST_SUBSTRING searches
   in source-string. The substring argument is the address of a
   descriptor pointing to the first substring. You can specify
   multiple substrings to search for.
 

substring

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

   Additional specified substring for which STR$FIND_FIRST_SUBSTRING
   searches in source-string. The substring argument is the address
   of a descriptor pointing to the substring. You can specify
   multiple substrings to search for.