1 files changed, 89 insertions, 0 deletions
diff --git a/libc/stdio/fseeko.c b/libc/stdio/fseeko.c
new file mode 100644
index 000000000..fed425730
--- /dev/null
+++ b/libc/stdio/fseeko.c
@@ -0,0 +1,89 @@
+/* Copyright (C) 2004       Manuel Novoa III    <mjn3@codepoet.org>
+ *
+ * GNU Library General Public License (LGPL) version 2 or later.
+ *
+ * Dedicated to Toni.  See uClibc/DEDICATION.mjn3 for details.
+ */
+
+#include "_stdio.h"
+
+#if SEEK_SET != 0 || SEEK_CUR != 1 || SEEK_END != 2
+# error Assumption violated -- values of SEEK_SET, SEEK_CUR, SEEK_END
+#endif
+
+#ifdef __DO_LARGEFILE
+# ifndef __UCLIBC_HAS_LFS__
+#  error large file support is not enabled!
+# endif
+
+# define FSEEK				__fseeko64
+# define OFFSET_TYPE		__off64_t
+
+weak_alias(__fseeko64,fseeko64);
+
+#else
+
+# define FSEEK				fseek
+# define OFFSET_TYPE		long int
+
+weak_alias(fseek,fseeko);
+
+#endif
+
+
+int FSEEK(register FILE *stream, OFFSET_TYPE offset, int whence)
+{
+#if defined(__UCLIBC_HAS_LFS__) && !defined(__DO_LARGEFILE)
+
+	return __fseeko64(stream, offset, whence);
+
+#else
+
+	__offmax_t pos = offset;
+	int retval = -1;
+	__STDIO_AUTO_THREADLOCK_VAR;
+
+	if (((unsigned int) whence) > 2) {
+		__set_errno(EINVAL);
+	} else {
+		__STDIO_AUTO_THREADLOCK(stream);
+
+		__STDIO_STREAM_VALIDATE(stream);
+
+		if ((!__STDIO_STREAM_IS_WRITING(stream)
+			  || !__STDIO_COMMIT_WRITE_BUFFER(stream))
+			&& ((whence != SEEK_CUR) 
+				 || (__stdio_adjust_position(stream, &pos) >= 0))
+			&& (__SEEK(stream, &pos, whence) >= 0)
+			) {
+
+			/* Clear reading/writing modes, EOF, and ungots. */
+			stream->__modeflags &=
+				~(__MASK_READING|__FLAG_WRITING|__FLAG_EOF);
+
+			/* Make sure all pointers are reset. */
+			__STDIO_STREAM_INIT_BUFREAD_BUFPOS(stream);
+			__STDIO_STREAM_DISABLE_GETC(stream);
+			__STDIO_STREAM_DISABLE_PUTC(stream);
+
+			/* We reinitialize the mbstate object.  Doing so is
+			 * implementation defined behavior. */
+#ifdef __STDIO_MBSTATE
+			__INIT_MBSTATE(&(stream->__state));
+#endif
+#ifdef __UCLIBC_HAS_WCHAR__
+			stream->__ungot_width[0] = 0;
+#endif
+
+			retval = 0;
+		}
+
+		__STDIO_STREAM_VALIDATE(stream);
+
+		__STDIO_AUTO_THREADUNLOCK(stream);
+	}
+
+	return retval;
+
+#endif
+}