1 files changed, 124 insertions, 0 deletions
diff --git a/Build/source/libs/zziplib/zziplib-src/zzip/__mmap.h b/Build/source/libs/zziplib/zziplib-src/zzip/__mmap.h
new file mode 100644
index 00000000000..5dfc45dcda2
--- /dev/null
+++ b/Build/source/libs/zziplib/zziplib-src/zzip/__mmap.h
@@ -0,0 +1,124 @@
+#ifndef __ZZIP_INTERNAL_MMAP_H
+#define __ZZIP_INTERNAL_MMAP_H
+#include <zzip/types.h>
+
+/*
+ * DO NOT USE THIS CODE.
+ *
+ * It is an internal header file for zziplib that carries some inline
+ * functions (or just static members) and a few defines, simply to be
+ * able to reuse these across - and have everything in a specific place.
+ *
+ * Copyright (c) 2002,2003 Guido Draheim
+ *          All rights reserved,
+ *          use under the restrictions of the 
+ *          Lesser GNU General Public License
+ *          or alternatively the restrictions 
+ *          of the Mozilla Public License 1.1
+ */
+
+#ifdef _USE_MMAP
+#if    defined ZZIP_HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#define USE_POSIX_MMAP 1
+#elif defined ZZIP_HAVE_WINBASE_H || defined WIN32
+#include <windows.h>
+#define USE_WIN32_MMAP 1
+#else
+#undef _USE_MMAP
+#endif
+#endif
+
+/* -------------- specify MMAP function imports --------------------------- */
+
+#if     defined  USE_POSIX_MMAP
+#define USE_MMAP 1
+
+#define _zzip_mmap(user, fd, offs, len) \
+              mmap (0, len, PROT_READ, MAP_SHARED, fd, offs)
+#define _zzip_munmap(user, ptr, len) \
+              munmap (ptr, len)
+#define _zzip_getpagesize(user) getpagesize()
+
+#ifndef MAP_FAILED /* hpux10.20 does not have it */
+#define MAP_FAILED ((void*)(-1))
+#endif
+
+#elif   defined USE_WIN32_MMAP
+#define USE_MMAP 1
+#ifndef MAP_FAILED
+#define MAP_FAILED 0
+#endif
+/* we (ab)use the "*user" variable to store the FileMapping handle */
+                 /* and make sure (sizeof(*user) == sizeof(HANDLE)) */
+
+static size_t win32_getpagesize (void)
+{ 
+    SYSTEM_INFO si; GetSystemInfo (&si); 
+    return si.dwAllocationGranularity; 
+}
+#ifdef _WIN64
+static void*  win32_mmap (__int64* user, int fd, zzip_off_t offs, size_t len)
+#else
+static void*  win32_mmap (long* user, int fd, zzip_off_t offs, size_t len)
+#endif
+{
+    if (! user || *user != 1) /* || offs % getpagesize() */
+	return 0;
+  {
+    HANDLE hFile = (HANDLE)_get_osfhandle(fd);
+    if (hFile)
+#ifdef _WIN64
+	*user = (__int64) CreateFileMapping (hFile, 0, PAGE_READONLY, 0, 0, NULL);
+#else
+	*user = (long) CreateFileMapping (hFile, 0, PAGE_READONLY, 0, 0, NULL);
+#endif
+    if (*user)
+    {
+	char* p = 0;
+	p = MapViewOfFile(*(HANDLE*)user, FILE_MAP_READ, 0, offs, len);
+	if (p) return p;
+	CloseHandle (*(HANDLE*)user); *user = 1;
+    } 
+    return MAP_FAILED;
+  }
+}
+#ifdef _WIN64
+static void win32_munmap (__int64* user, char* fd_map, size_t len)
+#else
+static void win32_munmap (long* user, char* fd_map, size_t len)
+#endif
+{
+    UnmapViewOfFile (fd_map);
+    CloseHandle (*(HANDLE*)user); *user = 1;
+}
+#ifdef _WIN64
+#define _zzip_mmap(user, fd, offs, len) \
+        win32_mmap ((__int64*) &(user), fd, offs, len)
+#define _zzip_munmap(user, ptr, len) \
+        win32_munmap ((__int64*) &(user), ptr, len)
+#else
+#define _zzip_mmap(user, fd, offs, len) \
+        win32_mmap ((long*) &(user), fd, offs, len)
+#define _zzip_munmap(user, ptr, len) \
+        win32_munmap ((long*) &(user), ptr, len)
+#endif
+#define _zzip_getpagesize(user) win32_getpagesize()
+#else   /* disable */
+#define USE_MMAP 0
+/* USE_MAP is intentional: we expect the compiler to do some "code removal"
+ * on any source code enclosed in if (USE_MMAP) {...}   i.e. the unreachable
+ * branch of an if (0) {....} is not emitted to the final object binary. */
+
+#ifndef MAP_FAILED
+#define MAP_FAILED  0
+#endif
+
+#define _zzip_mmap(user, fd, offs, len) (MAP_FAILED)
+#define _zzip_munmap(user, ptr, len) {}
+#define _zzip_getpagesize(user) 1
+
+#endif /* USE_MMAP defines */
+
+
+#endif