arbitrary precision integer support

+ - * / % << >> log2 compare are supported
and dont fear, no bloated lib, just 130 lines of c code

Originally committed as revision 3105 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 47 insertions, 0 deletions

diff --git a/libavcodec/integer.h b/libavcodec/integer.h
new file mode 100644
index 0000000000..ef1b2a089e
--- /dev/null
+++ b/libavcodec/integer.h
@@ -0,0 +1,47 @@
+/*
+ * arbitrary precision integers
+ * Copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+ 
+/**
+ * @file integer.h
+ * arbitrary precision integers
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+ 
+#ifndef INTEGER_H
+#define INTEGER_H
+
+#define AV_INTEGER_SIZE 8
+
+typedef struct AVInteger{
+    uint16_t v[AV_INTEGER_SIZE]; 
+} AVInteger;
+
+AVInteger av_add_i(AVInteger a, AVInteger b);
+AVInteger av_sub_i(AVInteger a, AVInteger b);
+int av_log2_i(AVInteger a);
+AVInteger av_mul_i(AVInteger a, AVInteger b);
+int av_cmp_i(AVInteger a, AVInteger b);
+AVInteger av_shr_i(AVInteger a, int s);
+AVInteger av_mod_i(AVInteger *quot, AVInteger a, AVInteger b);
+AVInteger av_div_i(AVInteger a, AVInteger b);
+AVInteger av_int2i(int64_t a);
+int64_t av_i2int(AVInteger a);
+
+#endif // INTEGER_H