From 1a8fe67acf5903caacc6da2854a074ed0c4b2743 Mon Sep 17 00:00:00 2001
From: Alexander Krutwig <alexander.krutwig@embedded-brains.de>
Date: Wed, 13 Jul 2016 09:22:35 +0200
Subject: Add Untar_FromChunk_Print() + Test

---
 cpukit/libmisc/untar/untar.h | 93 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)

(limited to 'cpukit/libmisc/untar/untar.h')

diff --git a/cpukit/libmisc/untar/untar.h b/cpukit/libmisc/untar/untar.h
index d67c29e7f4..006f06d065 100644
--- a/cpukit/libmisc/untar/untar.h
+++ b/cpukit/libmisc/untar/untar.h
@@ -44,6 +44,99 @@ int Untar_FromMemory_Print(void *tar_buf, size_t size, const rtems_printer* prin
 int Untar_FromFile(const char *tar_name);
 int Untar_FromFile_Print(const char *tar_name, const rtems_printer* printer);
 
+typedef struct {
+  /**
+   * @brief Current context state.
+   */
+  enum {
+    UNTAR_CHUNK_HEADER,
+    UNTAR_CHUNK_SKIP,
+    UNTAR_CHUNK_WRITE,
+    UNTAR_CHUNK_ERROR
+  } state;
+
+  /**
+   * @brief Header buffer.
+   */
+  char header[512];
+
+  /**
+   * @brief Name buffer.
+   */
+  char fname[100];
+
+  /**
+   * @brief Number of bytes of overall length are already processed.
+   */
+  size_t done_bytes;
+
+  /**
+   * @brief Overall amount of bytes to be processed.
+   */
+  long unsigned todo_bytes;
+
+  /**
+   * @brief Overall amount of blocks to be processed.
+   */
+  unsigned long todo_blocks;
+
+  /**
+   * @brief File descriptor of output file.
+   */
+  int out_fd;
+} Untar_ChunkContext;
+
+typedef struct {
+  /**
+   * @brief Instance of Chunk Context needed for tar decompression.
+   */
+  Untar_ChunkContext base;
+
+  /**
+   * @brief Current zlib context.
+   */
+  z_stream strm;
+
+  /**
+   * @brief Buffer that contains the inflated data.
+   */
+  void *inflateBuffer;
+
+  /**
+   * @brief Size of buffer that contains the inflated data.
+   */
+  size_t inflateBufferSize;
+
+} Untar_GzChunkContext;
+
+/**
+ * @brief Initializes the Untar_ChunkContext files out of a part of a block of
+ * memory.
+ *
+ * @param Untar_ChunkContext *context [in] Pointer to a context structure.
+ */
+void Untar_ChunkContext_Init(Untar_ChunkContext *context);
+
+/*
+ * @brief Rips links, directories and files out of a part of a block of memory.
+ *
+ * @param Untar_ChunkContext *context [in] Pointer to a context structure.
+ * @param void *chunk [in] Pointer to a chunk of a TAR buffer.
+ * @param size_t chunk_size [in] Length of the chunk of a TAR buffer.
+ *
+ * @retval UNTAR_SUCCESSFUL (0)    on successful completion.
+ * @retval UNTAR_FAIL              for a faulty step within the process.
+ * @retval UNTAR_INVALID_CHECKSUM  for an invalid header checksum.
+ * @retval UNTAR_INVALID_HEADER    for an invalid header.
+ */
+
+int Untar_FromChunk_Print(
+  Untar_ChunkContext *context,
+  void *chunk,
+  size_t chunk_size,
+  const rtems_printer* printer
+);
+
 /**************************************************************************
  * This converts octal ASCII number representations into an
  * unsigned long.  Only support 32-bit numbers for now.
-- 
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