Mail Archives: djgpp/2001/11/20/06:40:26
| From: | =?windows-1250?Q?Ladislav_Dvo=F8=E1k?= <dvorakl AT jednotacb DOT cz>
|
| To: | <djgpp AT delorie DOT com>
|
| Subject: | Re: crashed when float = int / 2
|
| Date: | Tue, 20 Nov 2001 10:20:38 +0100
|
| Message-ID: | <NEBBLBIDCLEEIPODBKHIMEPPCCAA.dvorakl@jednotacb.cz>
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| Reply-To: | djgpp AT delorie DOT com
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I show crash dump. And there is Coprocessor not available.... I showed
complete dump list as many as now. Previously I showed only latest line
(display is too small). I enable floating-point emulation and I think, that
is a solution.
Thank you, for your help
Lada Dvorak
"Hans-Bernhard Broeker" < broeker AT physik DOT rwth-aachen DOT de
<mailto:broeker AT physik DOT rwth-aachen DOT de> > wrote in message
news:9tbb2t$i06$1 AT nets3 DOT rz DOT RWTH-Aachen DOT DE...
> Ladislav Dvo??k < dvorakl AT jednotacb DOT cz <mailto:dvorakl AT jednotacb DOT cz> >
wrote:
> > Hi,
> > I have a application. When I run this application in Windows 95 or in
DOS
> > (with cwsdpmi.exe), he works without problem. When I this application
run on
> > barcode scanner Falcon 330 with ROM-DOS 6.22 and AMD Elan AM486
processor I
> > have this problem.
>
> > long vyhledzbo(char ean[20])
> > {
> > FILE *ciselnik;
> > int vpom,pozmez,prv,pzaznamu,pruchodu=18;
> > long kurszmm,kurszm,vpozice;
> > char cean[20];
> > float krok;
> > int delkavety = 102;
> > ciselnik = fopen("expean.txt","r");
> > fseek (ciselnik,-delkavety,SEEK_END);
>
> I suspect the error happens here, already. Note that you opened the
> file in text mode, and then used fseek in SEEK_END mode on it, with a
> nonzero offset. That's not guaranteed to do anything useful at all.
>
> It'd probably be better if you opened that file in binary mode.
>
> > pzaznamu = (ftell(ciselnik) / delkavety) + 1;
> > krok = pzaznamu / 2;
>
> > On line >krok=pzaznamu /2;< program crashed.
>
> How exactly did it crash, and how certain are you that it was *this*
> particular line? If you have a crash dump, please show it.
>
> My guess would be that it's not this line, but the one above it that's
> going wrong. Int->float conversion should always be safe, whereas the
> conversion from long to int involved in your calculation of pzaznamu
> may or may not.
>
> BTW: you *did* #include <stdio.h> somewhere before this snippet, I hope?
> --
> Hans-Bernhard Broeker ( broeker AT physik DOT rwth-aachen DOT de
<mailto:broeker AT physik DOT rwth-aachen DOT de> )
> Even if all the snow were burnt, ashes would remain.
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<p class=3DMsoNormal><font size=3D3 color=3Dblack face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:black'>I show crash dump. And there is
Coprocessor not available.... I showed<br>
complete dump list as many as now. Previously I showed only latest =
line<br>
(display is too small). I enable floating-point emulation and I think, =
that<br>
is a solution.<br>
Thank you, for your help<br>
Lada Dvorak<br>
<br>
"Hans-Bernhard Broeker" <<a
href=3D"mailto:broeker AT physik DOT rwth-aachen DOT de">broeker AT physik DOT rwth-aachen.=
de</a>>
wrote in message<br>
<a =
href=3D"news:9tbb2t$i06$1 AT nets3 DOT rz DOT RWTH-Aachen DOT DE">news:9tbb2t$i06$1 AT nets=
3.rz.RWTH-Aachen.DE</a>...<br>
> Ladislav Dvo??k <<a =
href=3D"mailto:dvorakl AT jednotacb DOT cz">dvorakl AT jednotacb DOT cz</a>>
wrote:<br>
> > Hi,<br>
> > I have a application. When I run this application in Windows =
95 or in<br>
DOS<br>
> > (with cwsdpmi.exe), he works without problem. When I this =
application<br>
run on<br>
> > barcode scanner Falcon 330 with ROM-DOS 6.22 and AMD Elan =
AM486<br>
processor I<br>
> > have this problem.<br>
><br>
> > long vyhledzbo(char ean[20])<br>
> > {<br>
> > FILE *ciselnik;<br>
> > int vpom,pozmez,prv,pzaznamu,pruchodu=3D18;<br>
> > long kurszmm,kurszm,vpozice;<br>
> > char cean[20];<br>
> > float krok;<br>
> > int delkavety =3D 102;<br>
> > ciselnik =3D fopen("expean.txt","r");<br>
> > fseek (ciselnik,-delkavety,SEEK_END);<br>
><br>
> I suspect the error happens here, already. Note that you =
opened the<br>
> file in text mode, and then used fseek in SEEK_END mode on it, with =
a<br>
> nonzero offset. That's not guaranteed to do anything useful at =
all.<br>
><br>
> It'd probably be better if you opened that file in binary mode.<br>
><br>
> > pzaznamu =3D (ftell(ciselnik) / delkavety) + 1;<br>
> > krok =3D pzaznamu / 2;<br>
><br>
> > On line >krok=3Dpzaznamu /2;< program crashed.<br>
><br>
> How exactly did it crash, and how certain are you that it was =
*this*<br>
> particular line? If you have a crash dump, please show =
it.<br>
><br>
> My guess would be that it's not this line, but the one above it =
that's<br>
> going wrong. Int->float conversion should always be safe, =
whereas
the<br>
> conversion from long to int involved in your calculation of =
pzaznamu<br>
> may or may not.<br>
><br>
> BTW: you *did* #include <stdio.h> somewhere before this =
snippet, I
hope?<br>
> --<br>
> Hans-Bernhard Broeker (<a =
href=3D"mailto:broeker AT physik DOT rwth-aachen DOT de">broeker AT physik DOT rwth-aachen.=
de</a>)<br>
> Even if all the snow were burnt, ashes would =
remain.</span></font><span
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