trusty (3) lsame.3.gz

NAME

       LSAME - return .TRUE

SYNOPSIS

       LOGICAL FUNCTION LSAME( CA, CB )

           CHARACTER    CA, CB

PURPOSE

       LSAME returns .TRUE. if CA is the same letter as CB regardless of case.

ARGUMENTS

       CA      (input) CHARACTER*1
               CB      (input) CHARACTER*1 CA and CB specify the single characters to be compared.

               Test if the characters are equal

               Now test for equivalence if both characters are alphabetic.

               Use 'Z' rather than 'A' so that ASCII can be detected on Prime machines, on which ICHAR returns a
               value with bit 8 set.  ICHAR('A') on Prime machines returns 193 which is the same  as  ICHAR('A')
               on an EBCDIC machine.

               ASCII is assumed - ZCODE is the ASCII code of either lower or upper case 'Z'.

               EBCDIC is assumed - ZCODE is the EBCDIC code of either lower or upper case 'Z'.

               ASCII  is  assumed, on Prime machines - ZCODE is the ASCII code plus 128 of either lower or upper
               case 'Z'.

               RETURN

               End of LSAME