MrPiglr
9dddce666d
- Forked from Godot Engine 4.7-dev (MIT License) - Rebranded to AeThex Engine with cyan/purple theme - Added AI-powered development assistant module - Integrated Claude API for code completion & error fixing - Custom hexagon logo and branding - Multi-platform CI/CD (Windows, Linux, macOS) - Built Linux editor binary (151MB) - Complete source code with all customizations Tech Stack: - C++ game engine core - AI Module: Claude 3.5 Sonnet integration - Build: SCons, 14K+ source files - License: MIT (Godot) + Custom (AeThex features) Ready for Windows build via GitHub Actions!
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely, subject to the following restrictions:
|
|
|
|
1. The origin of this software must not be misrepresented; you must not
|
|
claim that you wrote the original software. If you use this software
|
|
in a product, an acknowledgment in the product documentation would be
|
|
appreciated but is not required.
|
|
2. Altered source versions must be plainly marked as such, and must not be
|
|
misrepresented as being the original software.
|
|
3. This notice may not be removed or altered from any source distribution.
|
|
*/
|
|
#include "SDL_internal.h"
|
|
|
|
/* Public domain CRC implementation adapted from:
|
|
http://home.thep.lu.se/~bjorn/crc/crc32_simple.c
|
|
|
|
This algorithm is compatible with the 16-bit CRC described here:
|
|
https://www.lammertbies.nl/comm/info/crc-calculation
|
|
*/
|
|
/* NOTE: DO NOT CHANGE THIS ALGORITHM
|
|
There is code that relies on this in the joystick code
|
|
*/
|
|
|
|
static Uint16 crc16_for_byte(Uint8 r)
|
|
{
|
|
Uint16 crc = 0;
|
|
int i;
|
|
for (i = 0; i < 8; ++i) {
|
|
crc = ((crc ^ r) & 1 ? 0xA001 : 0) ^ crc >> 1;
|
|
r >>= 1;
|
|
}
|
|
return crc;
|
|
}
|
|
|
|
Uint16 SDL_crc16(Uint16 crc, const void *data, size_t len)
|
|
{
|
|
// As an optimization we can precalculate a 256 entry table for each byte
|
|
size_t i;
|
|
for (i = 0; i < len; ++i) {
|
|
crc = crc16_for_byte((Uint8)crc ^ ((const Uint8 *)data)[i]) ^ crc >> 8;
|
|
}
|
|
return crc;
|
|
}
|