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engine: common: filesystem.c: add binary search for files from zip-archives.

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This commit is contained in:
Andrey Akhmichin 2020-11-29 20:18:04 +05:00 committed by Alibek Omarov
parent b278751834
commit 75210b1ff6
1 changed files with 40 additions and 5 deletions
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45
engine/common/filesystem.c
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@ -679,6 +679,21 @@ pack_t *FS_LoadPackPAK( const char *packfile, int *error )
return pack;
}
/*
============
FS_SortZip
============
*/
static int FS_SortZip( const void *a, const void *b )
{
return Q_stricmp( ( ( zipfile_t* )a )->name, ( ( zipfile_t* )b )->name );
}
/*
============
FS_LoadZip
============
*/
static zip_t *FS_LoadZip( const char *zipfile, int *error )
{
int numpackfiles = 0, i;
@ -838,6 +853,8 @@ static zip_t *FS_LoadZip( const char *zipfile, int *error )
zip->numfiles = numpackfiles;
zip->files = info;
qsort( zip->files, zip->numfiles, sizeof( zipfile_t ), FS_SortZip );
#ifdef XASH_REDUCE_FD
// will reopen when needed
close(zip->handle);
@ -2499,15 +2516,33 @@ static searchpath_t *FS_FindFile( const char *name, int *index, qboolean gamedir
}
else if( search->zip )
{
int i;
for( i = 0; search->zip->numfiles > i; i++)
int left, right, middle;
zip_t *zip;
zip = search->zip;
// look for the file (binary search)
left = 0;
right = zip->numfiles - 1;
while( left <= right )
{
if( !Q_stricmp( search->zip->files[i].name, name ) )
int diff;
middle = (left + right) / 2;
diff = Q_stricmp( zip->files[middle].name, name );
// Found it
if( !diff )
{
if( index )
*index = i;
if( index ) *index = middle;
return search;
}
// if we're too far in the list
if( diff > 0 )
right = middle - 1;
else left = middle + 1;
}
}
else