How to write a Hex value in a file...

[Red_Squirrel]

Sorry for my bad english, I'm italian ^^'

I want to write a Hex value in a file.
I already made a function to hex modify a file, and I use this code to write in a precious offset:

Code: Select all

int pos = sceIoLseek(fd, 0x46A8, SEEK_SET);
               sceIoWrite(fd, i1, sizeof(i1));

But it writes an ASCII value (i1 is a char value) in the offset position...
I need to modfy the hex value of the offset and not the ASCII one.

Please, could anyone help me? :(

EDIT: the Hex value that i would to write in the offset is "08".

[Alberto]

I want to write a Hex value in a file.
I already made a function to hex modify a file, and I use this code to write in a precious offset:

Code: Select all

int pos = sceIoLseek(fd, 0x46A8, SEEK_SET);
               sceIoWrite(fd, i1, sizeof(i1));

But it writes an ASCII value (i1 is a char value) in the offset position...
I need to modfy the hex value of the offset and not the ASCII one.

Please, could anyone help me? :(

EDIT: the Hex value that i would to write in the offset is "08".

and what does i1 contain, as a char??? you should do i1 = 0x08 before writing it to the file, I assume...

[Red_Squirrel]

Usually i1 contains letters, like "A", "B", "C" or other char as "?", "!", "("...

[Red_Squirrel]

I want to write a Hex value in a file.
I already made a function to hex modify a file, and I use this code to write in a precious offset:

Code: Select all

int pos = sceIoLseek(fd, 0x46A8, SEEK_SET);
               sceIoWrite(fd, i1, sizeof(i1));

But it writes an ASCII value (i1 is a char value) in the offset position...
I need to modfy the hex value of the offset and not the ASCII one.

Please, could anyone help me? :(

EDIT: the Hex value that i would to write in the offset is "08".

and what does i1 contain, as a char??? you should do i1 = 0x08 before writing it to the file, I assume...

No, it does not work :(

[Mihawk]

hint:

Code: Select all

int sceIoWrite(SceUID fd, const void *data, SceSize size);

P.S.:
How do you know that it writes an ASCII value and not a HEX one?
And why don't you like ASCII values? Is it just because HEX sounds cooler? Ok, you say your english is not so good, but do you know what discrimination is?

[Red_Squirrel]

hint:

Code: Select all

int sceIoWrite(SceUID fd, const void *data, SceSize size);

P.S.:
How do you know that it writes an ASCII value and not a HEX one?
And why don't you like ASCII values? Is it just because HEX sounds cooler? Ok, you say your english is not so good, but do you know what discrimination is?

I need to insert the "08" hex value in the file... in ASCII it has not a value :|
With a hex editor I saw that "08" value is egual to a "." value, but if I insert with the keyboard the "." value in the ASCII column, in the hex one appear the code "2E"... but I need 08...

Could anyone help me?
Please...

[J.F.]

Writing data to a file is beginner programming. Go look at a general C tutorial or programming book. We aren't going to help with beginner stuff here.

[Red_Squirrel]

Writing data to a file is beginner programming. Go look at a general C tutorial or programming book. We aren't going to help with beginner stuff here.

So you don't know how to do it...

[Red_Squirrel]

Ok guys, no problem :)
Thanks to all for the help and see you later ;)

[Jim]

It's the difference between
unsigned char i1 = 8;
and
unsigned char i1 = '8';

Jim

[jimparis]

sceIoWrite takes a pointer as the second argument, not a value.

[J.F.]

Again, that's all beginner programming. If the person can't tell the difference between using a pointer and using a value, or between 8 and '8', they aren't ready to program the PSP. They need more lessons in C.