bkahn@spud.webo.dg.com (Bruce Kahn) (12/07/90)
I may be dense but I cant seem to figure out the use of #defines w/macros
and auto substitution of parameters. I have some Uni* code Im porting (indent
actually) that uses a statement :
#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; \
}
and then elsewhere in the main program it does a call like:
check_size (code);
where there are variables named e_code, l_code, codebuf and s_code already
declared. What would be the equivalent MSC 5.1 code to do this? I tried to
remove the offending /**/ but then I get a compile error w/e_name, etc...
Any suggestions (apart from hard code it)??
--
Bruce (bkahn@archive.webo.dg.com or
kahn@adam.dg.com)
Standard disclaimers apply, except where prohibited by law...epames@eos.ericsson.se (Michael Salmon) (12/07/90)
In article <1197@dg.dg.com> Bruce Kahn writes: > >#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; \ > } > > > and then elsewhere in the main program it does a call like: > > check_size (code); > >where there are variables named e_code, l_code, codebuf and s_code already >declared. What would be the equivalent MSC 5.1 code to do this? I tried to >remove the offending /**/ but then I get a compile error w/e_name, etc... > > Any suggestions (apart from hard code it)?? > As you worked out the intention was to concatenate a string literal with a variable. ANSI compilers have a more portable way of doing it, if memory serves me correctly it is ##. Check the manual it will give you the details. I believe that it is called stringizing. I hope that this is of help. Michael Salmon L.M.Ericsson Stockholm