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Path: utzoo!watmath!clyde!rutgers!sri-unix!husc6!mit-eddie!genrad!decvax!tektronix!reed!omen!caf
From: caf@omen.UUCP
Newsgroups: net.sources,comp.sys.ibm.pc
Subject: Portability problems in ZMODEM (zm.c)
Message-ID: <461@omen.UUCP>
Date: Sat, 24-Jan-87 15:36:09 EST
Article-I.D.: omen.461
Posted: Sat Jan 24 15:36:09 1987
Date-Received: Sun, 25-Jan-87 06:14:10 EST
Organization: Omen Technology, Portland
Lines: 17
Xref: watmath net.sources:6215 comp.sys.ibm.pc:1129

The recent ZMODEM sources posted to the net reveal that compilers
have varying ideas about whether a hex constant is unsigned or
not.  The presence of a hex constant in calls to the UPDC32 macro
resulted in a a 32 bit Tower of Babel syndrome, even among different
versions of the Microsoft C compiler.  The two lines in zm.c that
contain the hex all one's preset should be changed as shown below.

	crc = 0xFFFFFFFF; crc = UPDC32(type, crc);
	crc = 0xFFFFFFFF; crc = UPDC32(c, crc);


Chuck Forsberg WA7KGX Author of Pro-YAM communications Tools for PCDOS and Unix
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