Get rid of 0x0d!!!

[okeyla]

In a image format header , 0x0c0x0a is the keyword.

As i write it in a program , it's result is always WRONG!
0x0a is automatically generate a 0x0d before itself.

For example , write in 0x0c0x0a -> response 0x0c0x0d0x0a
What should i do?!?!?!

Source Code is as follows:
===
int out = open("test.vox",O_RDWR | O_CREAT | O_BINARY,S_IWRITE);
if (out <=0 )
{
printf("file open error \n");
}
else
{

char temp[17]="Vox1999a\x0a##\x0c\x0a##\n";
// ^^^^^^^^
write(out,temp,16);
write(out,"VolumeSize ",11);
itoa(xd2,strtmp,10); //x dim
write(out,strtmp,strlen(strtmp));
write(out," ",1);
itoa(yd2,strtmp,10); //y dim
write(out,strtmp,strlen(strtmp));
write(out," ",1);
itoa(zd2,strtmp,10); //z dim
write(out,strtmp,strlen(strtmp));
write(out,"\n",1);
//...µ¥µ¥µ¥
close(out);
}

[CornedBee]

Apparently there's something wrong with your open call, the O_BINARY seems to have no effect. Thus, the 0x0a (newline) gets a 0x0d (carriage return) placed before it.

Why are you using low-level I/O anyway? Since you're not buffering yourself, the higher-level I/O would be more efficient.

[okeyla]

I just tried fopen method...it still failed...

FILE *stream;
stream = fopen( "test.vox", "wb" );
fprintf(stream,"Vox1999a%c##%c%c##%c%c", '\n', 0x0c, '\n', 0x0C, '\n' );
fclose(stream);

Anyone could help me?
(I really hate 0x0d!!! >_<)

[Paul McKenzie]

Why not just write the ASCII value that you really want to see in the file instead of '\n'?

fprintf( szBuf,"Vox1999a%c##%c%c##%c%c", 0x0a, 0x0c, 0x0a, 0x0C, 0x0a ); // or whatever

Regards,

Paul McKenzie

[CornedBee]

Because there is no difference in C between '\n' and 0x0a.

What compiler and standard library do you use?

[Paul McKenzie]

Well, the culprit could be in the fprintf() statement. Try fwrite() and use a string literal with the arguments in the string already.

char p[] = "Vox1999a\n##\x0c\n##\x0c\n";
//...
FILE *fstream;
//...
fstream = fopen ("whatever.bin", "wb");
fwrite( p, 1,  strlen(p), fstream);
fclose ( fstream );

Does the problem exist with the following code? If it does, then there is a general problem with your fstream library. If it doesn't, then fprintf() is doing something that it shouldn't be doing.

Regards,

Paul McKenzie