On Wed, May 21, 2025 at 05:47:20PM +, WhatMeWorry via Digitalmars-d-learn
wrote:
> On Friday, 16 May 2025 at 19:04:24 UTC, WhatMeWorry wrote:
> > /+ SDL3 has a function
> > bool SDL_SetTextureAlphaMod(SDL_Texture *texture, Uint8 alpha);
> > which has a Uint8 for one of its parameters. So I tr
On Friday, 16 May 2025 at 19:04:24 UTC, WhatMeWorry wrote:
[...]
cast(uint8_t) b = cast(uint8_t) b + cast(uint8_t) 5; //
[...]
Somehow I don't get close enough to the underlying problem:
```d
void main(){
ubyte a;
a= cast( ubyte) ( a + 5);
assert( a == 5);
import core.stdc.stdint;
On Friday, 16 May 2025 at 19:19:41 UTC, H. S. Teoh wrote:
For example, how do you negate a ubyte?
Mathematically this is only defined for 0 over the range of
ubyte.
Obviously, you can't do this:
```
ubyte a;
a -=;
```
But writing it as `a = -a;` runs into the same error, for
On Friday, 16 May 2025 at 19:04:24 UTC, WhatMeWorry wrote:
/+ SDL3 has a function
bool SDL_SetTextureAlphaMod(SDL_Texture *texture, Uint8 alpha);
which has a Uint8 for one of its parameters. So I try to use a
ubyte
+/
[...]
So what would be best practice here?
Declare an int, manually make
On Wednesday, 21 May 2025 at 14:40:21 UTC, realhet wrote:
On Wednesday, 21 May 2025 at 14:00:56 UTC, realhet wrote:
Small program to reproduce.
I'm lucky:
`pragma(msg, "Here comes the big data: ", data);`
With this simple way I managed to put 16MB large data through it
in no time.
It was new t
On Wednesday, 21 May 2025 at 14:00:56 UTC, realhet wrote:
Hi,
Small program to reproduce.
```d
import std;
string doit(string data)()
{
static foreach(i; 0..256)
{
pragma(msg, i"Here goes lots of data:
$(cast(ubyte[])data)".text);
}
return "dummy";
}
static
On Friday, 16 May 2025 at 19:04:24 UTC, WhatMeWorry wrote:
cast(uint8_t) b = cast(uint8_t) b + cast(uint8_t) 5; //
onlineapp.d(19): Error: cannot
implicitly convert expression
Hi,
I have a pragma(msg, xxx) statement where x is a byte array of
30KBytes.
LDC2 produces the following symptom: It's memory usage goes
slowly up to the maximum (20GB) then stops with out of memory
error. The amount of used memory grows in an exponentially
slowing rate. (I guess it's a rea
On Wednesday, 21 May 2025 at 08:09:23 UTC, xoxo wrote:
auto fn_test = cast(void function(int, int)) dlsym(lib, "test");
This is the problem - you're casting the address to an
`extern(D)` function pointer. Use something like this:
```
alias Fn = extern(C) void function(int, int);
auto fn_test
On Saturday, 17 May 2025 at 13:09:40 UTC, Jonathan M Davis wrote:
On Friday, May 16, 2025 1:19:41 PM Mountain Daylight Time H. S.
Teoh via Digitalmars-d-learn wrote:
Welcome to your first encounter with why I hate D's narrow
integer promotion rules.
It's because C (and I'm pretty sure the CPU
Hello, I am loading a library built with dmd on linux, but when I
call other functions, the arguments order is reversed
I understand calling convention from C/D is different, but
shouldn't the compiler handle that automatically? if not, then
that sounds like a bug?
```sh
LD_LIBRARY_PATH=".
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