fseeko emulation patch by Steven M. Schultz <sms at 2bsd.com>

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12072 b3059339-0415-0410-9bf9-f77b7e298cf2

2 files changed, 85 insertions, 1 deletions

diff --git a/osdep/Makefile b/osdep/Makefile
index cc3ea85487..6460c0f7d1 100644
--- a/osdep/Makefile
+++ b/osdep/Makefile
@@ -3,7 +3,7 @@ include ../config.mak
 
 LIBNAME = libosdep.a
 
-SRCS= shmem.c strsep.c vsscanf.c scandir.c gettimeofday.c # timer.c
+SRCS= shmem.c strsep.c vsscanf.c scandir.c gettimeofday.c fseeko.c # timer.c
 
 ifeq ($(TARGET_ARCH_X86),yes)
 ifeq ($(TARGET_OS),Linux)
diff --git a/osdep/fseeko.c b/osdep/fseeko.c
new file mode 100644
index 0000000000..14f601575a
--- /dev/null
+++ b/osdep/fseeko.c
@@ -0,0 +1,84 @@
+/*
+ * fseeko.c
+ *	  64-bit versions of fseeko/ftello() for systems which do not have them
+ */
+
+#include "../config.h"
+ 
+#if !defined(HAVE_FSEEKO) || !defined(HAVE_FTELLO)
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#endif
+
+#ifdef WIN32
+#define flockfile
+#define funlockfile
+#endif
+
+/*
+ *	On BSD/OS and NetBSD (and perhaps others), off_t and fpos_t are the 
+ *      same.  Standards say off_t is an arithmetic type, but not necessarily 
+ *      integral, while fpos_t might be neither.
+ *
+ *	This is thread-safe on BSD/OS using flockfile/funlockfile.
+ */
+
+#ifndef HAVE_FSEEKO
+int
+fseeko(FILE *stream, off_t offset, int whence)
+{
+	off_t floc;
+	struct stat filestat;
+
+	switch (whence)
+	{
+		case SEEK_CUR:
+			flockfile(stream);
+			if (fgetpos(stream, &floc) != 0)
+				goto failure;
+			floc += offset;
+			if (fsetpos(stream, &floc) != 0)
+				goto failure;
+			funlockfile(stream);
+			return 0;
+			break;
+		case SEEK_SET:
+			if (fsetpos(stream, &offset) != 0)
+				return -1;
+			return 0;
+			break;
+		case SEEK_END:
+			flockfile(stream);
+			if (fstat(fileno(stream), &filestat) != 0)
+				goto failure;
+			floc = filestat.st_size;
+			if (fsetpos(stream, &floc) != 0)
+				goto failure;
+			funlockfile(stream);
+			return 0;
+			break;
+		default:
+			errno =	EINVAL;
+			return -1;
+	}
+
+failure:
+	funlockfile(stream);
+	return -1;
+}
+#endif
+
+
+#ifndef HAVE_FTELLO
+off_t
+ftello(FILE *stream)
+{
+	off_t floc;
+
+	if (fgetpos(stream, &floc) != 0)
+		return -1;
+	return floc;
+}
+#endif