jdp@killer.DALLAS.TX.US (Jim Pritchett) (11/06/88)
Could someone please give me a short description of the following Lattice
functions (parameters, function, etc.)?
getfnl()
strbpl()
Also, does the Unix (tm) function system() return to the caller when the
external program is completed?
Thank you,
Jim Pritchett
uucp: killer!gtmvax!dms3b1!caleb!jdpfgd3@jc3b21.UUCP (Fabbian G. Dufoe) (11/07/88)
From article <6013@killer.DALLAS.TX.US>, by jdp@killer.DALLAS.TX.US (Jim Pritchett): > > Could someone please give me a short description of the following Lattice > functions (parameters, function, etc.)? > > getfnl() > strbpl() > > Also, does the Unix (tm) function system() return to the caller when the > external program is completed? > > > Thank you, > > Jim Pritchett > > uucp: killer!gtmvax!dms3b1!caleb!jdp NAME: getfnl Get filename list SYNOPSIS: #include <stdlib.h> n = getfnl(fnp, fna, fnasize, attr); int n; number of matching file names char *fnp; file name pattern char *fna; file name array unsigned fnasize; size of file name array int attr; file attribute DESCRIPTION This function gets all file names that match the specified pattern and attribute, and it places them into the file name array. Each name is stored as a null-terminated string, and the file name array is terminated by a null string (i.e. a string consisting of only one null byte). If the file name pattern includes a path prefix, that prefix is placed in front of each matching file name. The function return value is the number of strings stored in the array, not including the terminating null string. ------------------------------------------------------------------- NAME: strbpl Build string pointer list SYNOPSIS #include <string.h> n = strbpl(s, max, t); int n; number of pointers char *s[]; pointer to string pointer list int max; maximum number of pointers char *t; text pointer DESCRIPTION This function constructs a list of pointers to the strings contained within the specified text array. Each string must be null-terminated, and the text array must be terminated by a null string. In other workds, array t must end with two null bytes, one to terminate the final string and another to terminated the array. The string pointer list s is terminated by a null pointer. --Fabbian Dufoe 350 Ling-A-Mor Terrace South St. Petersburg, Florida 33705 813-823-2350 UUCP: ...codas!usfvax2!jc3b21!fgd3 ...uunet!pdn!jc3b21!fgd3
morgan@hcr.UUCP (Morgan Jones) (11/14/88)
In article <6013@killer.DALLAS.TX.US> jdp@killer.UUCP writes: >Also, does the Unix (tm) function system() return to the caller when the >external program is completed? int system(cmd) char *cmd; { if (cmd == "" || cmd == NULL) Execute("",Input(),0L); else Execute("",0L,0L); return(0); } Though I can't remember if you have to specify output as well in either case. Alternatively, you may want to return -1 if Execute fails, but you can't tell if the command failed. > Jim Pritchett -- Morgan W. Jones morgan@hcr.uucp HCR Corporation, Toronto, Ontario, Canada BMATH - T minus 6 months and counting ...
michael@stb.UUCP (Michael) (12/14/88)
In article <4197@hcr.UUCP> morgan@hcr.UUCP (Morgan Jones) writes: >In article <6013@killer.DALLAS.TX.US> jdp@killer.UUCP writes: >>Also, does the Unix (tm) function system() return to the caller when the >>external program is completed? > >int >system(cmd) > char *cmd; >{ > if (cmd == "" || cmd == NULL) > Execute("",Input(),0L); > else > Execute("",0L,0L); > return(0); >} no no no. First, system takes a cmd arg. I know the above is wrong because it isn't even using cmd. In answer to the question about unix, it does return when the called program returns. So, a better approach would be Execute (cmd, Input(), Output()); is closer. Problems: If cmd == NULL, Execute will start a shell, system() does nothing. If you are from Workbench, I don't think Input() and Output() are defined (might be NULL, which is OK; might be garbage, which is not). I thought I remembered another difference between system and Execute, but I can't think of it offhand. Michael : --- : Michael Gersten uunet.uu.net!stb!michael : crash!gryphon!denwa!stb!michael : Coff Coff <=== Stop smoking.
tada@athena.mit.edu (Michael Zehr) (02/18/89)
Has anyone experienced the following problem with lattice C? (5.02)
variable = &foo.bar.arry[n];
printf("%d %d\n", (int) variable, (int) &foo.bar.arry[n]);
...yielding two different values!?!
i've noticed it twice in programs, and so far, it appears that if n=0,
the assignment is correct, but the evaluation in printf is wrong, and
if n=1, it's the reverse.
both times, it's been the same root structure that has had problems.
there's no redefinition of it, no strange macros, no compilation or
linking warnings.
does anyone know of cases in which lattice C screws up structure
addresses and/or offsets? is this why there's no option to see the
assembly code produced by the compiler? (1/2 :-) )
what do people recommend for a C compiler? i need one that does a
fairly decent job of optimizing, but i'd also like it to be correct...
-michael j zehrcmcmanis%pepper@Sun.COM (Chuck McManis) (02/18/89)
In article <9311@bloom-beacon.MIT.EDU> (Michael Zehr) writes: >Has anyone experienced the following problem with lattice C? (5.02) >variable = &foo.bar.arry[n]; >printf("%d %d\n", (int) variable, (int) &foo.bar.arry[n]); >...yielding two different values!?! It looks like a precedence problem, Lattice may incorrectly assign "[]" and "&" the same precedence. Have you tried &(foo.bar.arry[n]) instead? >does anyone know of cases in which lattice C screws up structure >addresses and/or offsets? is this why there's no option to see the >assembly code produced by the compiler? (1/2 :-) ) This is a completely bogus statement. A) Lattice has supplied OMD to create assembly source from object modules since 3.1, B) with 5.0 you could always pop cpr into "assembly" display mode and step through the code. >what do people recommend for a C compiler? i need one that does a >fairly decent job of optimizing, but i'd also like it to be correct... Was this with the -O switch that it screwed up? Or just on regular compiles. If you really want control of your compiler port Gnu CC. --Chuck McManis uucp: {anywhere}!sun!cmcmanis BIX: cmcmanis ARPAnet: cmcmanis@sun.com These opinions are my own and no one elses, but you knew that didn't you.
mwm@eris.berkeley.edu (Mike (I'll think of something yet) Meyer) (03/03/89)
In article <9311@bloom-beacon.MIT.EDU> tada@athena.mit.edu (Michael Zehr) writes:
<Has anyone experienced the following problem with lattice C? (5.02)
<
<variable = &foo.bar.arry[n];
<printf("%d %d\n", (int) variable, (int) &foo.bar.arry[n]);
<
<...yielding two different values!?!
<
<i've noticed it twice in programs, and so far, it appears that if n=0,
<the assignment is correct, but the evaluation in printf is wrong, and
<if n=1, it's the reverse.
<
<does anyone know of cases in which lattice C screws up structure
<addresses and/or offsets? is this why there's no option to see the
<assembly code produced by the compiler? (1/2 :-) )
There's a known bug in 5 that causes offsets to be sign-extended.
This would cause the address to be mis-evaluated if it were more than
32K from the base of the structure.
I found this by checking the assembler ouptut via cpr (actually, it
took noticing that instructions changed between startup & execution,
and running with a watch break on them....)
<what do people recommend for a C compiler? i need one that does a
<fairly decent job of optimizing, but i'd also like it to be correct...
From what I've seen, Lattice seems to have fewer bugs/release than
Manx. Neither is perfect, though both do better than many people you'd
wouldn't expect it of.
I've heard rumors of a port of gcc, with unhappy results (RMS likes
using stack space).
<mike
--
The Sword of Damocles is hanging over my head Mike Meyer
And I've got a feeling someone's gonna be cuttin' the thread mwm@berkeley.edu
Oh -- woe is me, My life is a misery ucbvax!mwm
And all I can see is I'm on the start of a pretty big downer mwm@ucbjade.BITNETmplevine@phoenix.prineton.edu (Marshall Levine) (11/20/89)
I am in the market for a C compiler. Is Lattice v 5.04 the latest version? Is it very buggy? How much does it cost? I heard that Lattice gives 50% discounts to students. Is this true? Will 5.04 compile into USABLE assembly? What does the 5.04 package come with? Is it worth even considering Manx? Is a source-level debugger included? How about a code profiler? Optimization? Does the package come with assembly include files? If anyone has tried the C++ compiler, is it any good? Will it also compile ANSI-C? How much does it cost? Also, could someone please send me a mailing address for Lattice (e-mail, if possible)? Thanks in advance. -- Marshall Levine mplevine@phoenix.princeton.edu