/*
===================
qboolean CRC_File(unsigned short *crcvalue, char *pszFileName)
Computes CRC for given file. If there is an error opening/reading the file, returns false,
otherwise returns true and sets the crc value passed to it. The value should be initialized
with CRC_Init
==================
*/
bool CRC_File(CRC32_t *crcvalue, const char *pszFileName)
{
// Always re-init the CRC buffer
CRC32_Init( crcvalue );
FileHandle_t fp;
byte chunk[1024];
int nBytesRead;
int nSize;
nSize = COM_OpenFile(pszFileName, &fp);
if ( !fp || ( nSize == -1 ) )
return FALSE;
// Now read in 1K chunks
while (nSize > 0)
{
if (nSize > 1024)
nBytesRead = g_pFileSystem->Read(chunk, 1024, fp);
else
nBytesRead = g_pFileSystem->Read(chunk, nSize, fp);
// If any data was received, CRC it.
if (nBytesRead > 0)
{
nSize -= nBytesRead;
CRC32_ProcessBuffer(crcvalue, chunk, nBytesRead);
}
// We we are end of file, break loop and return
if ( g_pFileSystem->EndOfFile( fp ) )
{
g_pFileSystem->Close( fp );
fp = 0;
break;
}
// If there was a disk error, indicate failure.
else if ( !g_pFileSystem->IsOk(fp) )
{
if ( fp )
g_pFileSystem->Close(fp);
return FALSE;
}
}
if ( fp )
g_pFileSystem->Close(fp);
return TRUE;
}
int Mod_FindExternalVIS (loadedfile_t *brush_fileinfo)
{
char visfilename[1024];
int fhandle;
int len, i, pos;
searchpath_t *s_vis;
vispatch_t header;
char mapname[VISPATCH_MAPNAME_LENGTH+5]; // + ".vis" + EoS
fhandle = -1;
if (external_vis->value)
{
// check for a .VIS file
strcpy(visfilename, loadmodel->name);
COM_StripExtension(visfilename, visfilename);
strcat(visfilename, ".vis");
len = COM_OpenFile (visfilename, &fhandle, &s_vis);
if (fhandle == -1) // check for a .VIS file with map's directory name (e.g. ID1.VIS)
{
strcpy(visfilename, "maps/");
strcat(visfilename, COM_SkipPath(brush_fileinfo->path->filename));
strcat(visfilename, ".vis");
len = COM_OpenFile (visfilename, &fhandle, &s_vis);
}
if (fhandle >= 0)
{
// check file for size
if (len <= 0)
{
COM_CloseFile(fhandle);
fhandle = -1;
}
}
if (fhandle >= 0)
{
// search map in visfile
strncpy(mapname, loadname, VISPATCH_MAPNAME_LENGTH);
mapname[VISPATCH_MAPNAME_LENGTH] = 0;
strcat(mapname, ".bsp");
pos = 0;
while ((i = Sys_FileRead (fhandle, &header, sizeof(struct vispatch_s))) == sizeof(struct vispatch_s))
{
header.filelen = LittleLong(header.filelen);
pos += i;
if (!Q_strncasecmp (header.mapname, mapname, VISPATCH_MAPNAME_LENGTH)) // found
{
break;
}
pos += header.filelen;
Sys_FileSeek(fhandle, pos);
}
if (i != sizeof(struct vispatch_s))
{
COM_CloseFile(fhandle);
fhandle = -1;
}
}
if (fhandle >= 0)
{
Con_DPrintf("%s for %s loaded from %s\n", visfilename, mapname, s_vis->pack ? s_vis->pack->filename : s_vis->filename);
}
}
return fhandle;
}
//-----------------------------------------------------------------------------
// Purpose:
// Input : digest[16] -
// *pszFileName -
// bSeed -
// seed[4] -
// Output : Returns true on success, false on failure.
//-----------------------------------------------------------------------------
bool MD5_Hash_File(unsigned char digest[16], char *pszFileName, bool bSeed /* = FALSE */, unsigned int seed[4] /* = NULL */)
{
FileHandle_t fp;
byte chunk[1024];
int nBytesRead;
MD5Context_t ctx;
int nSize;
nSize = COM_OpenFile( pszFileName, &fp );
if ( !fp || ( nSize == -1 ) )
return false;
memset(&ctx, 0, sizeof(MD5Context_t));
MD5Init(&ctx);
if (bSeed)
{
// Seed the hash with the seed value
MD5Update( &ctx, (const unsigned char *)&seed[0], 16 );
}
// Now read in 1K chunks
while (nSize > 0)
{
if (nSize > 1024)
nBytesRead = g_pFileSystem->Read(chunk, 1024, fp);
else
nBytesRead = g_pFileSystem->Read(chunk, nSize, fp);
// If any data was received, CRC it.
if (nBytesRead > 0)
{
nSize -= nBytesRead;
MD5Update(&ctx, chunk, nBytesRead);
}
// We we are end of file, break loop and return
if ( g_pFileSystem->EndOfFile( fp ) )
{
g_pFileSystem->Close( fp );
fp = NULL;
break;
}
// If there was a disk error, indicate failure.
else if ( !g_pFileSystem->IsOk(fp) )
{
if ( fp )
g_pFileSystem->Close(fp);
return FALSE;
}
}
if ( fp )
g_pFileSystem->Close(fp);
MD5Final(digest, &ctx);
return TRUE;
}
/*
===================
qboolean CRC_MapFile(unsigned short *crcvalue, char *pszFileName)
Computes CRC for given map file. If there is an error opening/reading the file, returns false,
otherwise returns true and sets the crc value passed to it. The value should be initialized
with CRC_Init
For map (.bsp) files, the entity lump is not included in the CRC.
//FIXME make this work
==================
*/
bool CRC_MapFile(CRC32_t *crcvalue, const char *pszFileName)
{
FileHandle_t fp;
byte chunk[1024];
int i, l;
int nBytesRead;
dheader_t header;
int nSize;
lump_t *curLump;
long startOfs;
nSize = COM_OpenFile(pszFileName, &fp);
if ( !fp || ( nSize == -1 ) )
return false;
startOfs = g_pFileSystem->Tell(fp);
// Don't CRC the header.
if (g_pFileSystem->Read(&header, sizeof(dheader_t), fp) == 0)
{
Con_Printf("Could not read BSP header for map [%s].\n", pszFileName);
g_pFileSystem->Close(fp);
return false;
}
i = LittleLong (header.version);
if ( i != BSPVERSION )
{
g_pFileSystem->Close(fp);
Con_Printf("Map [%s] has incorrect BSP version (%i should be %i).\n", pszFileName, i, BSPVERSION);
return false;
}
// CRC across all lumps except for the Entities lump
for (l = 0; l < HEADER_LUMPS; l++)
{
if (l == LUMP_ENTITIES)
continue;
curLump = &header.lumps[l];
nSize = curLump->filelen;
g_pFileSystem->Seek( fp, startOfs + curLump->fileofs, FILESYSTEM_SEEK_HEAD );
// Now read in 1K chunks
while (nSize > 0)
{
if (nSize > 1024)
nBytesRead = g_pFileSystem->Read(chunk, 1024, fp);
else
nBytesRead = g_pFileSystem->Read(chunk, nSize, fp);
// If any data was received, CRC it.
if (nBytesRead > 0)
{
nSize -= nBytesRead;
CRC32_ProcessBuffer(crcvalue, chunk, nBytesRead);
}
// If there was a disk error, indicate failure.
if ( !g_pFileSystem->IsOk(fp) )
{
if ( fp )
g_pFileSystem->Close(fp);
return false;
}
}
}
if ( fp )
g_pFileSystem->Close(fp);
return true;
}
