Add some historic code just for the heck of it.

attic/historic/anode/libspark/streamencoder.h

@@ -0,0 +1,108 @@
+/* libanode: the Anode C reference implementation
+ * Copyright (C) 2009 Adam Ierymenko <adam.ierymenko@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef _SPARK_STREAMENCODER_H
+#define _SPARK_STREAMENCODER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct
+{
+  unsigned char *input_buf;
+  unsigned long input_buf_capacity;
+  unsigned long input_length;
+
+  unsigned char *stream_out_buf;
+  unsigned long stream_out_buf_capacity;
+  unsigned long stream_out_length;
+
+  void (*data_segment_add_func)(const void *data,unsigned long len,const void *global_hash,unsigned long global_hash_len);
+} SparkStreamEncoder;
+
+/**
+ * Initialize a spark stream encoder
+ *
+ * @param enc Encoder structure to initialize
+ * @param data_segment_add_func Function to call to store or cache data
+ */
+void SparkStreamEncoder_init(
+  SparkStreamEncoder *enc,
+  void (*data_segment_add_func)(
+    const void *data,
+    unsigned long len,
+    const void *global_hash,
+    unsigned long global_hash_len));
+
+/**
+ * Clean up a spark stream encoder structure
+ *
+ * @param enc Structure to clear
+ */
+void SparkStreamEncoder_destroy(SparkStreamEncoder *enc);
+
+/**
+ * Add data to encode
+ *
+ * @param enc Encoder structure
+ * @param data Data to encode
+ * @param len Length of data in bytes
+ * @return Number of bytes of result stream now available
+ */
+unsigned long SparkStreamEncoder_put(
+  SparkStreamEncoder *enc,
+  const void *data,
+  unsigned long len);
+
+/**
+ * Flush all data currently in input buffer
+ *
+ * @param enc Encoder structure to flush
+ */
+void SparkStreamEncoder_flush(SparkStreamEncoder *enc);
+
+/**
+ * @return Number of bytes of output stream available
+ */
+static inline unsigned long SparkStreamEncoder_available(SparkStreamEncoder *enc)
+{
+  return enc->stream_out_length;
+}
+
+/**
+ * @return Pointer to result stream bytes (may return null if none available)
+ */
+static inline const void *SparkStreamEncoder_get(SparkStreamEncoder *enc)
+{
+  return (const void *)(enc->stream_out_buf);
+}
+
+/**
+ * @return "Consume" result stream bytes after they're read or sent
+ */
+static inline void SparkStreamEncoder_consume(SparkStreamEncoder *enc,unsigned long len)
+{
+  unsigned long i;
+  for(i=len;i<enc->stream_out_length;++i)
+    enc->stream_out_buf[i - len] = enc->stream_out_buf[i];
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif