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My code:


Primitive<uint64_t> full = 0xBBBBBBBBCCCCCCCC;
Primitive<uint64_t> first = 0x0000000000000000;
first = (full & 0xFFFFFFFE00000000);
std::cout << "FIRST: " << first << std::endl;

...

thanks!

Hello,

I have a 64-bit uint64_t number:


Primitive<uint64_t> b = 0xCCCCCCCC00000000;

I need to save the first 31 (most important) bits - 7FFFFFFE.

I found this solution in the Internet:

I think I got it sorted now :) thanks anyway.

I do use printf in other places, just prefer std::cout for temporary logging as I used to use it in my happy C++ days :)

Well I can use things like std::cout in my code for now, but will need to remove them later for the final build, as the final product will need to run on a C-only system.

What would I do then in this case:


char* endText;
endText = strstr(*objectData2, " 5000");

I don't know how long endText would be, but I need to append '\0' to the end of it. I was going to...

this is C with some C++ functionality...

oh! gotcha :) thanks

oh right.... isn't appending a null character the same as strcat-int an empty string?

oh... didn't realise I had to do it as I was using all 6 chars in it, I thought all the rubbish in the startText would be overwritten...

but yes, this sorted the problem:


for (int i = 0; i <...

Could someone explain to me what is going on here? Why does this code:


char[6] startText;

char data[] = "1.1\nWord\nWord\n0-5\n\0";
char* dataPtr = data;
char** objectData2 = &dataPtr;

Oh! I didn't realise I could do it this way: std::sscanf(*objectData, "%*f %*s %*s %d - %d", &num1, &num2);
This seemed to work!

right... I've been reading about sscanf and sprintf, and it does look like it's what I need, but at the moment I am getting strange results.

here is an example:

*objectData is:

...

Thanks, ill give it a try... But so far I find c string functions really difficult - always give weird results and it takes ages to recompile and retest in my environment

Problem:
I have a pointer to a pointer to a C string:

char **objectData;

In this string there are some numbers with a dash between them, for example, "5-10". I need to read these numbers in...

Yes, thanks :)

Sorry, completely forgot about strcpy :) Works!

Basically, I have a pointer to a C string:


char **objectData

and a C string:


char temp[350];

Sorry ignore the /r problem - I was logging incorrectly. /r exist in the original data as well.

Meanwhile, I think I found the problem.

I printed out the original objectData and the new objectData character by character. The original data contains new line characters. They also exist in the...

Thanks. I'll explore this.

Yes, I do :) thank you

Maybe I should append a null character then? I'll try this as well.

I started writing my own for loop to read through the data, and am getting a silly problem - how do I access the characters??...

Ah, strlen. I'll try this, thanks.

I'm inserting the text somewhere in the middle and only once in the function. But I guess doing it manually might be an option as I do get some rubbish in the...