From c3e813db9bc5afffa8a573f060fd177bf2e18e26 Mon Sep 17 00:00:00 2001
From: Robert Spalek <robert@ucw.cz>
Date: Thu, 24 Jun 2004 15:21:38 +0000
Subject: [PATCH] added a decoder from buckets to objects

just a proposed version for now (it even is not in the Makefile)
---
 lib/buck2obj.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/buck2obj.h |  7 +++++
 2 files changed, 92 insertions(+)
 create mode 100644 lib/buck2obj.c
 create mode 100644 lib/buck2obj.h

diff --git a/lib/buck2obj.c b/lib/buck2obj.c
new file mode 100644
index 00000000..235c17db
--- /dev/null
+++ b/lib/buck2obj.c
@@ -0,0 +1,85 @@
+/*
+ *	Bucket -> Object converter
+ *
+ *	(c) 2004, Robert Spalek <robert@ucw.cz>
+ */
+
+#include "lib/lib.h"
+#include "lib/fastbuf.h"
+#include "charset/unicode.h"
+#include "lib/object.h"
+#include "lib/bucket.h"
+#include "lib/lizard.h"
+#include "lib/buck2obj.h"
+
+#include <errno.h>
+
+static inline byte *
+decode_attributes(byte *start, byte *end, struct odes *o)
+{
+  byte *p = start;
+  while (p < end)
+  {
+    uns len;
+    GET_UTF8(p, len);
+    if (!len)
+      break;
+    byte type = p[len];
+    p[len] = 0;
+    obj_add_attr(o, type, p);
+  }
+  return p;
+}
+
+int
+extract_odes(struct obuck_header *hdr, struct fastbuf *body, struct odes *o, byte *buf, uns buf_len, struct lizard_buffer *lizard_buf)
+{
+  if (hdr->type < BUCKET_TYPE_V30C)
+  {
+    oa_allocate = 1;
+    obj_read_multi(body, o);
+  }
+  else
+  {
+    oa_allocate = 0;
+    /* Read all the bucket into 1 buffer, 0-copy if possible.  */
+    byte *start, *end;
+    uns len = bdirect_read_prepare(body, &start);
+    if (len < hdr->length)
+    {
+      if (hdr->length > buf_len)
+      {
+	errno = EFBIG;
+	return -1;
+      }
+      len = bread(body, buf, hdr->length);
+      start = buf;
+    }
+    end = start + len;
+
+    /* Decode the header, 0-copy.  */
+    byte *p = decode_attributes(start, end, o);
+
+    /* Decompress the body.  */
+    GET_UTF8(p, len);
+    int res = lizard_decompress_safe(p, lizard_buf, len);
+    if (res < 0)
+      return res;
+    if (res != (int) len)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+    /* Decode the body, 0-copy.  */
+    start = lizard_buf->ptr;
+    end = start + len;
+    p = decode_attributes(start, end, o);
+    if (p != end)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+  }
+  return 0;
+}
diff --git a/lib/buck2obj.h b/lib/buck2obj.h
new file mode 100644
index 00000000..9e272079
--- /dev/null
+++ b/lib/buck2obj.h
@@ -0,0 +1,7 @@
+/*
+ *	Bucket -> Object converter
+ *
+ *	(c) 2004, Robert Spalek <robert@ucw.cz>
+ */
+
+int extract_odes(struct obuck_header *hdr, struct fastbuf *body, struct odes *o, byte *buf, uns buf_len, struct lizard_buffer *lizard_buf);
-- 
2.39.2