auto import from //depot/cupcake/@135843

1 files changed, 61 insertions, 0 deletions

diff --git a/cbuffer.h b/cbuffer.h
new file mode 100644
index 0000000..d25d765
--- /dev/null
+++ b/cbuffer.h
@@ -0,0 +1,61 @@
+/* Copyright (C) 2007-2008 The Android Open Source Project
+**
+** This software is licensed under the terms of the GNU General Public
+** License version 2, as published by the Free Software Foundation, and
+** may be copied, distributed, and modified under those terms.
+**
+** This program 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 General Public License for more details.
+*/
+#ifndef _qemu_cbuffer_h
+#define _qemu_cbuffer_h
+
+#include <stdint.h>
+
+/* Basic circular buffer type and methods */
+
+typedef struct {
+    uint8_t*  buff;
+    int       size;
+    int       rpos;
+    int       count;
+} CBuffer;
+
+static __inline__ void
+cbuffer_reset( CBuffer*  cb, void*  buff, int  size )
+{
+    cb->buff  = buff;
+    cb->size  = size;
+    cb->rpos  = 0;
+    cb->count = 0;
+}
+
+static __inline__ int
+cbuffer_write_avail( CBuffer*  cb )
+{
+    return cb->size - cb->count;
+}
+
+extern int  cbuffer_write( CBuffer*  cb, const void*  from, int  len );
+extern int  cbuffer_write_peek( CBuffer*  cb, uint8_t*  *pbase );
+extern void cbuffer_write_step( CBuffer*  cb, int  len );
+
+static __inline__ int
+cbuffer_read_avail( CBuffer*  cb )
+{
+    return cb->count;
+}
+
+extern int  cbuffer_read( CBuffer*  cb, void*  to, int  len );
+extern int  cbuffer_read_peek( CBuffer*  cb, uint8_t*  *pbase );
+extern void cbuffer_read_step( CBuffer*  cb, int  len );
+
+extern const char*  cbuffer_quote( CBuffer*  cb );
+extern const char*  cbuffer_quote_data( CBuffer*  cb );
+extern void         cbuffer_print( CBuffer*  cb );
+
+#endif /* qemu_cbuffer_h */
+
+