CTCaer/RetroArch
1
0
Fork 0
mirror of https://github.com/CTCaer/RetroArch.git synced 2025-01-18 17:04:34 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Change "hashing" value used for netplay.

Browse Source
This commit is contained in:
Themaister 2011-10-07 22:33:38 +02:00
parent fa26f6a10c
commit 7d2d1ce49e
1 changed files with 19 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
netplay.c
View File

@ -272,9 +272,27 @@ bool netplay_can_poll(netplay_t *handle)
return handle->can_poll;
}
// Not really a hash, but should be enough to differentiate implementations from each other.
// Subtle differences in the implementation will not be possible to spot.
// The alternative would have been checking serialization sizes, but it was troublesome for cross platform compat.
static uint32_t implementation_magic_value(void)
{
uint32_t res = 0;
res |= (psnes_library_revision_major() & 0xf) << 0;
res |= (psnes_library_revision_minor() & 0xf) << 4;
// Shouldn't really use this, but oh well :) It'll do the job.
const char *lib = psnes_library_id();
size_t len = strlen(lib);
for (size_t i = 0; i < len; i++)
res ^= lib[i] << (i & 0xf);
return res;
}
static bool send_info(netplay_t *handle)
{
uint32_t header[3] = { htonl(g_extern.cart_crc), htonl(psnes_serialize_size()), htonl(psnes_get_memory_size(SNES_MEMORY_CARTRIDGE_RAM)) };
uint32_t header[3] = { htonl(g_extern.cart_crc), htonl(implementation_magic_value()), htonl(psnes_get_memory_size(SNES_MEMORY_CARTRIDGE_RAM)) };
if (send(handle->fd, CONST_CAST header, sizeof(header), 0) != sizeof(header))
return false;