Bundle Snappy source code.

[apitrace] / thirdparty / snappy / snappy-c.cc

diff --git a/thirdparty/snappy/snappy-c.cc b/thirdparty/snappy/snappy-c.cc
new file mode 100644 (file)
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+++ b/thirdparty/snappy/snappy-c.cc
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+// Copyright 2011 Martin Gieseking <martin.gieseking@uos.de>.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "snappy.h"
+#include "snappy-c.h"
+
+extern "C" {
+
+snappy_status snappy_compress(const char* input,
+                              size_t input_length,
+                              char* compressed,
+                              size_t *compressed_length) {
+  if (*compressed_length < snappy_max_compressed_length(input_length)) {
+    return SNAPPY_BUFFER_TOO_SMALL;
+  }
+  snappy::RawCompress(input, input_length, compressed, compressed_length);
+  return SNAPPY_OK;
+}
+
+snappy_status snappy_uncompress(const char* compressed,
+                                size_t compressed_length,
+                                char* uncompressed,
+                                size_t* uncompressed_length) {
+  size_t real_uncompressed_length;
+  if (!snappy::GetUncompressedLength(compressed,
+                                     compressed_length,
+                                     &real_uncompressed_length)) {
+    return SNAPPY_INVALID_INPUT;
+  }
+  if (*uncompressed_length < real_uncompressed_length) {
+    return SNAPPY_BUFFER_TOO_SMALL;
+  }
+  if (!snappy::RawUncompress(compressed, compressed_length, uncompressed)) {
+    return SNAPPY_INVALID_INPUT;
+  }
+  *uncompressed_length = real_uncompressed_length;
+  return SNAPPY_OK;
+}
+
+size_t snappy_max_compressed_length(size_t source_length) {
+  return snappy::MaxCompressedLength(source_length);
+}
+
+snappy_status snappy_uncompressed_length(const char *compressed,
+                                         size_t compressed_length,
+                                         size_t *result) {
+  if (snappy::GetUncompressedLength(compressed,
+                                    compressed_length,
+                                    result)) {
+    return SNAPPY_OK;
+  } else {
+    return SNAPPY_INVALID_INPUT;
+  }
+}
+
+snappy_status snappy_validate_compressed_buffer(const char *compressed,
+                                                size_t compressed_length) {
+  if (snappy::IsValidCompressedBuffer(compressed, compressed_length)) {
+    return SNAPPY_OK;
+  } else {
+    return SNAPPY_INVALID_INPUT;
+  }
+}
+
+}  // extern "C"