Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!lll-winken!uunet!portal!cup.portal.com!jwhitnell
From: jwhitnell@cup.portal.com (Jerry D Whitnell)
Newsgroups: comp.sys.mac.programmer
Subject: Re: ?Bug? in LsC Preprocessor.
Message-ID: <16382@cup.portal.com>
Date: 29 Mar 89 05:35:43 GMT
References: <11796@umn-cs.CS.UMN.EDU>
Distribution: usa
Organization: The Portal System (TM)
Lines: 26

|I'm having a problem with a macro in LsC.  The following macro is preprocessed
|"correctly" with the Sun and Sequent C preprocessors but in LsC I get
|just a syntax error.  
|
|#define check_size(name) \
|	if (e_/**/name >= l_/**/name) { \
|	etc.

What you see is a kludge based on the design of the UNIX C preprocessor.  LSC
supports the ANSI C ##, which concatenates two tokens together.  So try
the following:

#define check_size(name) \
        if (e_##name >= l_##name) { \
            register nsize = l_##name-s_##name+400; \
            name##buf = (char *) realloc(name##buf, nsize); \
            e_##name = name##buf + (e_##name-s_##name) + 1; \
            l_##name = name##buf + nsize - 5; \
            s_##name = name##buf + 1; \
        }
|
|Kenny Goers
|goers@umn-cs.cs.umn.edu

Jerry Whitnell
jwhitnel@cup.portal.com