From 16a329e152d8573aed882c8a4c0d65f403ce3a48 Mon Sep 17 00:00:00 2001
From: Martin Szulecki
Date: Thu, 29 Jan 2015 20:23:06 +0100
Subject: Add large file support

---
 configure.ac       | 27 +++++++++++++++++++++++++++
 src/Makefile.am    | 10 ++++++++--
 src/libirecovery.c |  6 +++---
 3 files changed, 38 insertions(+), 5 deletions(-)

diff --git a/configure.ac b/configure.ac
index d7aafbf..7a28800 100644
--- a/configure.ac
+++ b/configure.ac
@@ -95,6 +95,33 @@ case "$GLOBAL_CFLAGS" in
 		AC_DEFINE([HAVE_FVISIBILITY], [1], [Define if compiled with -fvisibility=hidden])
 esac
 
+# check for large file support
+AC_SYS_LARGEFILE
+LFS_CFLAGS=''
+if test "$enable_largefile" != no; then
+	if test "$ac_cv_sys_file_offset_bits" != 'no'; then
+		LFS_CFLAGS="$LFS_CFLAGS -D_FILE_OFFSET_BITS=$ac_cv_sys_file_offset_bits"
+	else
+		AC_MSG_CHECKING(for native large file support)
+		AC_RUN_IFELSE([AC_LANG_SOURCE([#include <unistd.h>
+		  int main (int argc, char **argv)
+		  {
+		      exit(!(sizeof(off_t) == 8));
+		  }])],
+		[ac_cv_sys_file_offset_bits=64; AC_DEFINE(_FILE_OFFSET_BITS,64)
+		 AC_MSG_RESULT(yes)],
+		[AC_MSG_RESULT(no)])
+	fi
+	if test "$ac_cv_sys_large_files" != 'no'; then
+		LFS_CFLAGS="$LFS_CFLAGS -D_LARGE_FILES=1"
+	fi
+	AC_FUNC_FSEEKO
+	if test "$ac_cv_sys_largefile_source" != 'no'; then
+		LFS_CFLAGS="$LFS_CFLAGS -D_LARGEFILE_SOURCE=1"
+	fi
+fi
+AC_SUBST(LFS_CFLAGS)
+
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
 
 AC_OUTPUT([
diff --git a/src/Makefile.am b/src/Makefile.am
index 4316454..73ae945 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,7 +1,13 @@
 AM_CPPFLAGS = -I$(top_srcdir)/include
 
-AM_CFLAGS = $(GLOBAL_CFLAGS) $(libusb_CFLAGS)
-AM_LDFLAGS = $(libusb_LIBS) $(LIBIRECOVERYLDFLAGS)
+AM_CFLAGS =                \
+	$(GLOBAL_CFLAGS)       \
+	$(LFS_CFLAGS)          \
+	$(libusb_CFLAGS)
+
+AM_LDFLAGS =               \
+	$(libusb_LIBS)         \
+	$(LIBIRECOVERYLDFLAGS)
 
 lib_LTLIBRARIES = libirecovery.la
 libirecovery_la_CFLAGS = $(AM_CFLAGS)
diff --git a/src/libirecovery.c b/src/libirecovery.c
index d632b63..fa0f417 100644
--- a/src/libirecovery.c
+++ b/src/libirecovery.c
@@ -1129,9 +1129,9 @@ IRECV_API irecv_error_t irecv_send_file(irecv_client_t client, const char* filen
 		return IRECV_E_FILE_NOT_FOUND;
 	}
 
-	fseek(file, 0, SEEK_END);
-	long length = ftell(file);
-	fseek(file, 0, SEEK_SET);
+	fseeko(file, 0, SEEK_END);
+	long length = ftello(file);
+	fseeko(file, 0, SEEK_SET);
 
 	char* buffer = (char*) malloc(length);
 	if (buffer == NULL) {
-- 
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