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Added the CRC of the joystick name to the GUID

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This will make it possible to have mappings for different controllers
that have the same VID/PID. This happens frequently with some generic
controller boards that have been reused in many products.

Fixes https://github.com/libsdl-org/SDL/issues/6004
This commit is contained in:
Sam Lantinga
2022-08-22 16:46:55 -07:00
parent 20715fa014
commit c1e0873940
21 changed files with 179 additions and 117 deletions
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2
src/joystick/virtual/SDL_virtualjoystick.c
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@@ -198,7 +198,7 @@ SDL_JoystickAttachVirtualInner(const SDL_VirtualJoystickDesc *desc)
/* Byteswap so devices get same GUID on little/big endian platforms. */
guid16 = (Uint16 *)hwdata->guid.data;
*guid16++ = SDL_SwapLE16(SDL_HARDWARE_BUS_VIRTUAL);
*guid16++ = 0;
*guid16++ = SDL_SwapLE16(SDL_crc16(0, name, SDL_strlen(name)));
*guid16++ = SDL_SwapLE16(hwdata->desc.vendor_id);
*guid16++ = 0;
*guid16++ = SDL_SwapLE16(hwdata->desc.product_id);