[trunk] activate LargeFileSupport in CMake

CMake/TestFileOffsetBits.c

@@ -0,0 +1,10 @@
+#include <sys/types.h>
+
+int main(int argc, char **argv)
+{
+  /* Cause a compile-time error if off_t is smaller than 64 bits */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+  int off_t_is_large[ (LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? 1 : -1 ];  
+  return 0;
+}
+

CMake/TestLargeFiles.c.cmake.in

@@ -0,0 +1,24 @@
+#cmakedefine _LARGEFILE_SOURCE
+#cmakedefine _LARGEFILE64_SOURCE
+#cmakedefine _LARGE_FILES
+#cmakedefine _FILE_OFFSET_BITS 
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv)
+{
+  /* Cause a compile-time error if off_t is smaller than 64 bits,
+   * and make sure we have ftello / fseeko.
+   */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+  int off_t_is_large[ (LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? 1 : -1 ];  
+  FILE *fp = fopen(argv[0],"r");
+  off_t offset = ftello( fp );
+
+  fseeko( fp, offset, SEEK_CUR );
+  fclose(fp);
+  return 0;
+}
+

CMake/TestLargeFiles.cmake

@@ -0,0 +1,120 @@
+# - Define macro to check large file support
+#
+#  OPJ_TEST_LARGE_FILES(VARIABLE)
+#
+#  VARIABLE will be set to true if off_t is 64 bits, and fseeko/ftello present.
+#  This macro will also set defines necessary enable large file support, for instance
+#  _LARGE_FILES
+#  _LARGEFILE_SOURCE
+#  _FILE_OFFSET_BITS 64  
+#  HAVE_FSEEKO
+#
+#  However, it is YOUR job to make sure these defines are set in a CMakedefine so they
+#  end up in a config.h file that is included in your source if necessary!
+
+MACRO(OPJ_TEST_LARGE_FILES VARIABLE)
+    IF(NOT DEFINED ${VARIABLE})
+
+        # On most platforms it is probably overkill to first test the flags for 64-bit off_t,
+        # and then separately fseeko. However, in the future we might have 128-bit filesystems
+        # (ZFS), so it might be dangerous to indiscriminately set e.g. _FILE_OFFSET_BITS=64.
+
+        MESSAGE(STATUS "Checking for 64-bit off_t")
+
+        # First check without any special flags
+        TRY_COMPILE(FILE64_OK "${PROJECT_BINARY_DIR}"    
+                    "${PROJECT_SOURCE_DIR}/CMake/TestFileOffsetBits.c")
+        if(FILE64_OK)
+          MESSAGE(STATUS "Checking for 64-bit off_t - present")			
+      	endif(FILE64_OK)
+
+        if(NOT FILE64_OK)	
+            # Test with _FILE_OFFSET_BITS=64
+            TRY_COMPILE(FILE64_OK "${PROJECT_BINARY_DIR}"
+                        "${PROJECT_SOURCE_DIR}/CMake/TestFileOffsetBits.c"
+                        COMPILE_DEFINITIONS "-D_FILE_OFFSET_BITS=64" )
+            if(FILE64_OK)
+                MESSAGE(STATUS "Checking for 64-bit off_t - present with _FILE_OFFSET_BITS=64")
+                set(_FILE_OFFSET_BITS 64)
+            endif(FILE64_OK)
+        endif(NOT FILE64_OK)    
+
+        if(NOT FILE64_OK)
+            # Test with _LARGE_FILES
+            TRY_COMPILE(FILE64_OK "${PROJECT_BINARY_DIR}"
+                        "${PROJECT_SOURCE_DIR}/CMake/TestFileOffsetBits.c"
+                        COMPILE_DEFINITIONS "-D_LARGE_FILES" )
+            if(FILE64_OK)
+                MESSAGE(STATUS "Checking for 64-bit off_t - present with _LARGE_FILES")
+                set(_LARGE_FILES 1)
+            endif(FILE64_OK)
+        endif(NOT FILE64_OK)
+	
+        if(NOT FILE64_OK)
+            # Test with _LARGEFILE_SOURCE
+            TRY_COMPILE(FILE64_OK "${PROJECT_BINARY_DIR}"
+                        "${PROJECT_SOURCE_DIR}/CMake/TestFileOffsetBits.c"
+                        COMPILE_DEFINITIONS "-D_LARGEFILE_SOURCE" )
+            if(FILE64_OK)
+                MESSAGE(STATUS "Checking for 64-bit off_t - present with _LARGEFILE_SOURCE")
+      		      	       set(_LARGEFILE_SOURCE 1)
+            endif(FILE64_OK)
+        endif(NOT FILE64_OK)
+
+        if(NOT FILE64_OK)
+            # now check for Windows stuff
+            TRY_COMPILE(FILE64_OK "${PROJECT_BINARY_DIR}"
+                        "${PROJECT_SOURCE_DIR}/CMake/TestWindowsFSeek.c")
+            if(FILE64_OK)
+                MESSAGE(STATUS "Checking for 64-bit off_t - present with _fseeki64")
+                set(HAVE__FSEEKI64 1)
+            endif(FILE64_OK)
+        endif(NOT FILE64_OK)
+
+        if(NOT FILE64_OK)
+            MESSAGE(STATUS "Checking for 64-bit off_t - not present")
+        else(NOT FILE64_OK)
+
+            # Set the flags we might have determined to be required above
+            configure_file("${PROJECT_SOURCE_DIR}/CMake/TestLargeFiles.c.cmake.in" 
+                           "${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestLargeFiles.c")
+
+            MESSAGE(STATUS "Checking for fseeko/ftello")            
+	    # Test if ftello/fseeko are	available
+	    TRY_COMPILE(FSEEKO_COMPILE_OK "${PROJECT_BINARY_DIR}"
+                        "${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestLargeFiles.c")
+	    if(FSEEKO_COMPILE_OK)
+                MESSAGE(STATUS "Checking for fseeko/ftello - present")
+            endif(FSEEKO_COMPILE_OK)
+
+            if(NOT FSEEKO_COMPILE_OK)
+                # glibc 2.2 neds _LARGEFILE_SOURCE for fseeko (but not 64-bit off_t...)
+                TRY_COMPILE(FSEEKO_COMPILE_OK "${PROJECT_BINARY_DIR}"
+                            "${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestLargeFiles.c"
+                            COMPILE_DEFINITIONS "-D_LARGEFILE_SOURCE" )
+                if(FSEEKO_COMPILE_OK)
+                    MESSAGE(STATUS "Checking for fseeko/ftello - present with _LARGEFILE_SOURCE")
+                    set(_LARGEFILE_SOURCE 1)
+                endif(FSEEKO_COMPILE_OK)
+            endif(NOT FSEEKO_COMPILE_OK)
+
+        endif(NOT FILE64_OK)
+
+	    if(FSEEKO_COMPILE_OK)
+                SET(${VARIABLE} 1 CACHE INTERNAL "Result of test for large file support" FORCE)
+                set(HAVE_FSEEKO 1)
+        else(FSEEKO_COMPILE_OK)
+			if (HAVE__FSEEKI64)
+				SET(${VARIABLE} 1 CACHE INTERNAL "Result of test for large file support" FORCE)
+				SET(HAVE__FSEEKI64 1 CACHE INTERNAL "Windows 64-bit fseek" FORCE)
+			else (HAVE__FSEEKI64)
+                MESSAGE(STATUS "Checking for fseeko/ftello - not found")
+                SET(${VARIABLE} 0 CACHE INTERNAL "Result of test for large file support" FORCE)
+			endif (HAVE__FSEEKI64)
+        endif(FSEEKO_COMPILE_OK)
+
+    ENDIF(NOT DEFINED ${VARIABLE})
+ENDMACRO(OPJ_TEST_LARGE_FILES VARIABLE)
+
+
+

CMake/TestWindowsFSeek.c

@@ -0,0 +1,11 @@
+
+#include <stdio.h>
+    
+int main()
+{
+  __int64 off=0;
+
+  _fseeki64(NULL, off, SEEK_SET);
+        
+  return 0;
+}

CMakeLists.txt

@@ -168,6 +168,10 @@ CHECK_INCLUDE_FILE("sys/stat.h"       HAVE_SYS_STAT_H)
 CHECK_INCLUDE_FILE("sys/types.h"       HAVE_SYS_TYPES_H)
 CHECK_INCLUDE_FILE("unistd.h"       HAVE_UNISTD_H)
 
+# Enable Large file support
+INCLUDE(TestLargeFiles)
+OPJ_TEST_LARGE_FILES(OPJ_HAVE_LARGEFILES)
+
 #-----------------------------------------------------------------------------
 # Build Library
 INCLUDE_DIRECTORIES(BEFORE ${OPENJPEG_BINARY_DIR})

libopenjpeg/opj_includes.h

@@ -26,6 +26,12 @@
 #ifndef OPJ_INCLUDES_H
 #define OPJ_INCLUDES_H
 
+/*
+ * This must be included before any system headers,
+ * since they can react to macro defined there
+ */
+#include "opj_config.h"
+
 /*
  ==========================================================
    Standard includes used by the library
@@ -42,6 +48,40 @@
 #include <ctype.h>
 #include <assert.h>
 
+/*
+  Use fseeko() and ftello() if they are available since they use
+  'off_t' rather than 'long'.  It is wrong to use fseeko() and
+  ftello() only on systems with special LFS support since some systems
+  (e.g. FreeBSD) support a 64-bit off_t by default.
+*/
+#if defined(HAVE_FSEEKO)
+#  define fseek  fseeko
+#  define ftell  ftello
+#endif
+
+
+#if defined(MSWINDOWS) && !defined(Windows95) && !defined(__BORLANDC__) && \
+  !(defined(_MSC_VER) && _MSC_VER < 1400) && \
+  !(defined(__MINGW32__) && __MSVCRT_VERSION__ < 0x800)
+  /*
+    Windows '95 and Borland C do not support _lseeki64
+    Visual Studio does not support _fseeki64 and _ftelli64 until the 2005 release.
+    Without these interfaces, files over 2GB in size are not supported for Windows.
+  */
+#  define OPJ_FSEEK(stream,offset,whence) _fseeki64(stream,/* __int64 */ offset,whence)
+#  define OPJ_FSTAT(fildes,stat_buff) _fstati64(fildes,/* struct _stati64 */ stat_buff)
+#  define OPJ_FTELL(stream) /* __int64 */ _ftelli64(stream)
+#  define OPJ_STAT_STRUCT_T struct _stati64
+#  define OPJ_STAT(path,stat_buff) _stati64(path,/* struct _stati64 */ stat_buff)
+#else
+#  define OPJ_FSEEK(stream,offset,whence) fseek(stream,offset,whence)
+#  define OPJ_FSTAT(fildes,stat_buff) fstat(fildes,stat_buff)
+#  define OPJ_FTELL(stream) ftell(stream)
+#  define OPJ_STAT_STRUCT_T struct stat
+#  define OPJ_STAT(path,stat_buff) stat(path,stat_buff)
+#endif
+
+
 /*
  ==========================================================
    OpenJPEG interface

opj_config.h.cmake.in

@@ -13,7 +13,15 @@
 #cmakedefine HAVE_LIBPNG 
 #cmakedefine HAVE_PNG_H 
 #cmakedefine HAVE_LIBTIFF
-#cmakedefine HAVE_TIFF_H 
+#cmakedefine HAVE_TIFF_H
+
+#cmakedefine _LARGEFILE_SOURCE
+#cmakedefine _LARGEFILE64_SOURCE
+#cmakedefine _LARGE_FILES
+#cmakedefine _FILE_OFFSET_BITS
+#cmakedefine HAVE_FSEEKO
+#cmakedefine HAVE__FSEEKI64
+
 
 #cmakedefine HAVE_LIBLCMS1
 #cmakedefine HAVE_LIBLCMS2