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address conversion routines
The routine interprets character strings representing
addresses, returning binary information suitable for use in system calls.
The routine takes addresses and returns strings representing the address
in a notation in common use in the Xerox Development Environment: <network
number>.<host number>.<port number> Trailing zero fields are suppressed, and
each number is printed in hexadecimal, in a format suitable for input to
Any fields lacking super-decimal digits will have a trailing appended.
Unfortunately, no universal standard exists for representing addresses.
An effort has been made to insure that be compatible with most formats
in common use. It will first separate an address into 1 to 3 fields using
a single delimiter chosen from period colon or pound-sign Each field
is then examined for byte separators (colon or period). If there are byte
separators, each subfield separated is taken to be a small hexadecimal
number, and the entirety is taken as a network-byte-ordered quantity to be
zero extended in the high-network-order bytes. Next, the field is inspected
for hyphens, in which case the field is assumed to be a number in decimal
notation with hyphens separating the millenia. Next, the field is assumed
to be a number: It is interpreted as hexadecimal if there is a leading
(as in C), a trailing (as in Mesa), or there are any super-decimal digits
present. It is interpreted as octal is there is a leading and there are
no super-octal digits. Otherwise, it is converted as a decimal number.
None. (See
The and functions appeared in
The
string returned by resides in a static memory area. The function should
diagnose improperly formed input, and there should be an unambiguous way
to recognize this.
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