From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Mon, 28 Feb 2011 19:48:49 +0000 (+0000)
Subject: properly use lseek64 on Linux for files larger than 2GB
X-Git-Tag: xonotic-v0.5.0~425^2~33
X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fdarkplaces.git;a=commitdiff_plain;h=6095a33fdc4a434d11de102b445515021847cfce

properly use lseek64 on Linux for files larger than 2GB
fix pak and pk3 loading to use unsigned int to allow 4GB archives rather
than erroring on files beyond 2GB


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@10870 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/fs.c b/fs.c
index e18216eb..e299761e 100644
--- a/fs.c
+++ b/fs.c
@@ -22,6 +22,8 @@
 		Boston, MA  02111-1307, USA
 */
 
+#define _LARGEFILE64_SOURCE 1
+
 #ifdef __APPLE__
 // include SDL for IPHONEOS code
 # include <TargetConditionals.h>
@@ -61,6 +63,12 @@
 // largefile support for Win32
 #ifdef WIN32
 # define lseek _lseeki64
+#elif defined(O_LARGEFILE)
+# define lseek lseek64
+#endif
+
+#ifndef O_LARGEFILE
+#define O_LARGEFILE 0
 #endif
 
 #if _MSC_VER >= 1400
@@ -636,9 +644,9 @@ int PK3_BuildFileList (pack_t *pack, const pk3_endOfCentralDir_t *eocd)
 					flags = PACKFILE_FLAG_DEFLATED;
 				else
 					flags = 0;
-				offset = BuffLittleLong (&ptr[42]) + eocd->prepended_garbage;
-				packsize = BuffLittleLong (&ptr[20]);
-				realsize = BuffLittleLong (&ptr[24]);
+				offset = (unsigned int)(BuffLittleLong (&ptr[42]) + eocd->prepended_garbage);
+				packsize = (unsigned int)BuffLittleLong (&ptr[20]);
+				realsize = (unsigned int)BuffLittleLong (&ptr[24]);
 
 				switch(ptr[5]) // C_VERSION_MADE_BY_1
 				{
@@ -736,7 +744,7 @@ pack_t *FS_LoadPackPK3 (const char *packfile)
 #if _MSC_VER >= 1400
 	_sopen_s(&packhandle, packfile, O_RDONLY | O_BINARY, _SH_DENYNO, _S_IREAD | _S_IWRITE);
 #else
-	packhandle = open (packfile, O_RDONLY | O_BINARY);
+	packhandle = open (packfile, O_RDONLY | O_BINARY | O_LARGEFILE);
 #endif
 	if (packhandle < 0)
 		return NULL;
@@ -910,7 +918,7 @@ pack_t *FS_LoadPackPAK (const char *packfile)
 #if _MSC_VER >= 1400
 	_sopen_s(&packhandle, packfile, O_RDONLY | O_BINARY, _SH_DENYNO, _S_IREAD | _S_IWRITE);
 #else
-	packhandle = open (packfile, O_RDONLY | O_BINARY);
+	packhandle = open (packfile, O_RDONLY | O_BINARY | O_LARGEFILE);
 #endif
 	if (packhandle < 0)
 		return NULL;
@@ -965,8 +973,8 @@ pack_t *FS_LoadPackPAK (const char *packfile)
 	// parse the directory
 	for (i = 0;i < numpackfiles;i++)
 	{
-		fs_offset_t offset = LittleLong (info[i].filepos);
-		fs_offset_t size = LittleLong (info[i].filelen);
+		fs_offset_t offset = (unsigned int)LittleLong (info[i].filepos);
+		fs_offset_t size = (unsigned int)LittleLong (info[i].filelen);
 
 		FS_AddFileToPack (info[i].name, pack, offset, size, size, PACKFILE_FLAG_TRUEOFFS);
 	}
@@ -1949,6 +1957,8 @@ int FS_SysOpenFD(const char *filepath, const char *mode, qboolean nonblocking)
 	if (nonblocking)
 		opt |= O_NONBLOCK;
 
+	opt |= O_LARGEFILE;
+
 #if _MSC_VER >= 1400
 	_sopen_s(&handle, filepath, mod | opt, _SH_DENYNO, _S_IREAD | _S_IWRITE);
 #else
@@ -2026,8 +2036,8 @@ qfile_t *FS_OpenPackedFile (pack_t* pack, int pack_ind)
 	// the dup() call to avoid having to close the dup_handle on error here
 	if (lseek (pack->handle, pfile->offset, SEEK_SET) == -1)
 	{
-		Con_Printf ("FS_OpenPackedFile: can't lseek to %s in %s (offset: %d)\n",
-					pfile->name, pack->filename, (int) pfile->offset);
+		Con_Printf ("FS_OpenPackedFile: can't lseek to %s in %s (offset: %08x%08x)\n",
+					pfile->name, pack->filename, (unsigned int)(pfile->offset >> 32), (unsigned int)(pfile->offset));
 		return NULL;
 	}