Re: [Dev-C++] Ascii and Binary help

[Reid T. <rei...@at...>]

Eric Edwards wrote:

> Scott,
>
> Try out this url:
>
> http://www.cprogramming.com/tutorial/cfileio.html
>
> Eric
>
> =20
>
> -----Original Message-----
> *From:* dev...@li...=20
> [mailto:dev...@li...] *On Behalf Of *Scott
> *Sent:* Wednesday, November 09, 2005 6:38 PM
> *To:* dev...@li...
> *Subject:* [Dev-C++] Ascii and Binary help
>
> =20
>
> Okay this is a hard question to phrase....
>
> I'm trying to do a simple command line
>
> utility in DevC, to write to a file.....
>
> =20
>
> Now i have no problems writing
>
> "Hello World" to the screen or text file.
>
> =20
>
> But how do i write a binary file?
>
> for example...
>
> =20
>
> The file i would like to store,
>
> looks like this when i cut and paste
>
> from notepad.
>
> =20
>
> "FORM  =88LWO2TAGS   Red Void  Void  LAYR   =12                  PNTS  =
=20
>             BBOX                           VMPA          =06VMAP   WGHT=
=20
> Void.Weight   ?=80  POLS   FACE   PTAG   COLR    PTAG   PART   PTAG  =20
> SURF   [1]SURF   =A6Void    COLR
> ?H=C8=C9?H=C8=C9?H=C8=C9  LUMI =06      DIFF       SPEC =06      TRAN  =
     RIND=20
> =06      BUMP       GLOS =06      VCOL ?=80    RGBAVoid.Vertex SMAN
> -----------------------------------------------------------------------=
-
> =80   RFOP [1]  TROP [1]"
>
> =20
>
> =20
>
> Now if i just cut and paste that and write it to a text file, like i=20
> do with Hello World, why does it not work?
>
> Strangely enough, when i compare the 1byte decimal values of my=20
> written version, and the original version..
>
> The first row of numbers are similar, but the 2nd row is different,=20
> and then all the rest similar or identical.....
>
> for example...=20
>
> =20
>
> 070 079 082 077 000 000 001 136 076 087 079 050 084 065 071 083
> 000 000 000 016 082 101 100 000 086 111 105 100 000 000 086 111
> 105 100 000 000 076 065 089 082 000 000 000 018 000 000 000 000
>
> =20
>
> 070 079 082 077 032 032 001 136 076 087 079 050 084 065 071 083
> 032 032 032 016 082 101 100 032 086 111 105 100 032 032 086 111
> 105 100 032 032 076 065 089 082 032 032 032 018 032 032 032 032
>
> =20
>
> Okay now the script i wrote that originally does this....
>
> -----------------------------------------------------------------------=
-------------------------------
>
> generic
>
> {
>
> output =3D File("test.obj","wb");
>
> output.writeData(test);
>
> output.close();
>
> @data test
>
> 070 079 082 077 000 000 001 136 076 087 079 050 084 065 071 083
> 000 000 000 016 082 101 100 000 086 111 105 100 000 000 086 111
> 105 100 000 000 076 065 089 082 000 000 000 018 000 000 000 000
>
> @end
>
> -----------------------------------------------------------------------=
-------------------------------------
>
> =20
>
> =20
>
> The main difference, being that WB is used in the script,
>
> which is obviously, Write Binary.....
>
> =20
>
> Any ideas on how i do the C equivilant?
>
> here is the sample C code...
>
> -----------------------------------------------------------------------=
-----
>
> #include <stdio.h>
> #include <stdlib.h>
> void main()
> {
> FILE *myfile;
> myfile =3D fopen("test.obj","wb");
> if(!myfile)
> {
> puts("Some kind of file error!");
> exit(0);
> }
> fprintf(myfile,"FORM  =88LWO2TAGS   Red Void  Void  LAYR  =20
> =12                  PNTS               BBOX                          =20
> VMPA          =06VMAP   WGHT Void.Weight   ?=80  POLS   FACE   PTAG  =20
> COLR    PTAG   PART   PTAG   SURF   [1]SURF   =A6Void    COLR
> ?H=C8=C9?H=C8=C9?H=C8=C9  LUMI =06      DIFF       SPEC =06      TRAN  =
     RIND=20
> =06      BUMP       GLOS =06      VCOL ?=80    RGBAVoid.Vertex SMAN
> -----------------------------------------------------------------------=
-
> =80   RFOP [1]  TROP [1]");
> fclose(myfile);
> }
>
> =20
>
> So can i use Fprintf, to write my variable "test" which is an an=20
> embedded 1byte decimal format?
>
> And get it written as binary?
>
> =20
>
> Could it perhaps be something like printf("%03d ",bytes[i] &0xff);}}=20
> (which is a rough  guess)
>
> =20
>
> Cheers,
>
> Scott.
>
> =20
>
http://www.die.net/doc/linux/man/man3/fwrite.3.html

#include <stdio.h>
#include <stdlib.h>

int
main()
{
    FILE *myfile;
    char  mydata[]=3D"FORM  =88LWO2TAGS   Red Void  Void  LAYR  =20
=12                  PNTS               BBOX                          =20
VMPA          =06VMAP   WGHT Void.Weight   ?=80  POLS   FACE   PTAG  =20
COLR    PTAG   PART   PTAG   SURF   [1]SURF   =A6Void    COLR\
?H=C8=C9?H=C8=C9?H=C8=C9  LUMI =06      DIFF       SPEC =06      TRAN    =
   RIND =06     =20
BUMP       GLOS =06      VCOL ?=80    RGBAVoid.Vertex SMAN =80   RFOP [1]=
 =20
TROP [1]";

myfile =3D fopen("test.obj","wb");
if(!myfile)
{
puts("Some kind of file error!");
exit(0);
}
fwrite(&mydata,sizeof(mydata),1,myfile);

fclose(myfile);
}