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- use a local hash function in the file system.

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This commit is contained in:
Christoph Oelckers 2023-08-21 22:32:15 +02:00
commit 3e3526f1ec
5 changed files with 451 additions and 21 deletions
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13
src/common/filesystem/resourcefile.cpp
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@ -36,8 +36,7 @@
#include <zlib.h>
#include "resourcefile.h"
#include "md5.h"
#include "md5.hpp"
std::string ExtractBaseName(const char* path, bool include_extension)
{
@ -358,19 +357,21 @@ int lumpcmp(const void * a, const void * b)
void FResourceFile::GenerateHash()
{
// hash the lump directory after sorting
using namespace fs_private::md5;
auto n = snprintf(Hash, 48, "%08X-%04X-", (unsigned)Reader.GetLength(), NumLumps);
MD5Context md5;
md5_state_t state;
md5_init(&state);
uint8_t digest[16];
for(uint32_t i = 0; i < NumLumps; i++)
{
auto lump = GetLump(i);
md5.Update((const uint8_t*)lump->FullName.c_str(), (unsigned)lump->FullName.length() + 1);
md5.Update((const uint8_t*)&lump->LumpSize, 4);
md5_append(&state, (const uint8_t*)lump->FullName.c_str(), (unsigned)lump->FullName.length() + 1);
md5_append(&state, (const uint8_t*)&lump->LumpSize, 4);
}
md5.Final(digest);
md5_finish(&state, digest);
for (auto c : digest)
{
n += snprintf(Hash + n, 3, "%02X", c);