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  1. +18 −0 .gitignore
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  3. +9 −0 README.md
  4. +1 −0 TODO.txt
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  7. +202 −0 c_src/google-snappy/COPYING
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  65. BIN c_src/google-snappy/testdata/mapreduce-osdi-1.pdf
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  72. BIN rebar
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18 .gitignore
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+/ebin
+/priv
+/.eunit/
+/c_src/google-snappy/.deps/
+/c_src/google-snappy/.libs/
+/c_src/google-snappy/Makefile
+/c_src/google-snappy/config.h
+/c_src/google-snappy/config.log
+/c_src/google-snappy/config.status
+/c_src/google-snappy/*.la
+/c_src/google-snappy/*.lo
+/c_src/google-snappy/*.o
+/c_src/google-snappy/stamp-h1
+/c_src/*.o
+/c_src/google-snappy/libtool
+/c_src/google-snappy/snappy-stubs-public.h
+/c_src/google-snappy/snappy_unittest
+*~
17 Makefile
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+all: google-snappy snappy
+
+snappy:
+ mkdir -p ebin
+ ./rebar compile
+
+google-snappy:
+ ./support/build-google-snappy.sh
+
+test: snappy
+ ./rebar eunit
+
+clean:
+ ./rebar clean
+ ./support/clean-google-snappy.sh
+ rm -fr priv ebin
+
9 README.md
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+# snappy-erlang-nif
+
+This is an Erlang NIF for Google's snappy fast compressor and decompressor.
+
+Google snappy's official repository and bug tracking system is at:
+
+* http://code.google.com/p/snappy/
+
+Its source is included in this project.
1 TODO.txt
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+see if rebar can integrate with google-snappy's autotools build system
106 c_src/erl_nif_compat.h
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+/**
+ * Copyright 2011, Filipe David Manana <fdmanana@apache.org>
+ * Web: http://github.com/fdmanana/snappy-erlang-nif
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ **/
+
+#ifndef ERL_NIF_COMPAT_H_
+#define ERL_NIF_COMPAT_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include "erl_nif.h"
+
+
+#if ERL_NIF_MAJOR_VERSION == 0 && ERL_NIF_MINOR_VERSION == 1
+#define OTP_R13B03
+#elif ERL_NIF_MAJOR_VERSION == 1 && ERL_NIF_MINOR_VERSION == 0
+#define OTP_R13B04
+#elif ERL_NIF_MAJOR_VERSION == 2 && ERL_NIF_MINOR_VERSION == 0
+#define OTP_R14
+#endif
+
+
+#ifdef OTP_R13B03
+
+#define enif_open_resource_type_compat enif_open_resource_type
+#define enif_alloc_resource_compat enif_alloc_resource
+#define enif_release_resource_compat enif_release_resource
+#define enif_alloc_binary_compat enif_alloc_binary
+#define enif_alloc_compat enif_alloc
+#define enif_free_compat enif_free
+#define enif_get_atom_compat enif_get_atom
+#define enif_priv_data_compat enif_get_data
+#define enif_make_uint_compat enif_make_ulong
+
+#define enif_make_string_compat(E, B, Enc) \
+ enif_make_string(E, B)
+
+#endif /* R13B03 */
+
+
+#ifdef OTP_R13B04
+
+#define enif_open_resource_type_compat enif_open_resource_type
+#define enif_alloc_resource_compat enif_alloc_resource
+#define enif_release_resource_compat enif_release_resource
+#define enif_alloc_binary_compat enif_alloc_binary
+#define enif_alloc_compat enif_alloc
+#define enif_free_compat enif_free
+#define enif_get_atom_compat enif_get_atom
+#define enif_priv_data_compat enif_priv_data
+#define enif_make_string_compat enif_make_string
+#define enif_make_uint_compat enif_make_uint
+
+#endif /* R13B04 */
+
+
+/* OTP R14 and future releases */
+#if !defined(OTP_R13B03) && !defined(OTP_R13B04)
+
+#define enif_open_resource_type_compat(E, N, D, F, T) \
+ enif_open_resource_type(E, NULL, N, D, F, T)
+
+#define enif_alloc_resource_compat(E, T, S) \
+ enif_alloc_resource(T, S)
+
+#define enif_release_resource_compat(E, H) \
+ enif_release_resource(H)
+
+#define enif_alloc_binary_compat(E, S, B) \
+ enif_alloc_binary(S, B)
+
+#define enif_alloc_compat(E, S) \
+ enif_alloc(S)
+
+#define enif_free_compat(E, P) \
+ enif_free(P)
+
+#define enif_get_atom_compat(E, T, B, S) \
+ enif_get_atom(E, T, B, S, ERL_NIF_LATIN1)
+
+#define enif_priv_data_compat enif_priv_data
+#define enif_make_string_compat enif_make_string
+#define enif_make_uint_compat enif_make_uint
+
+#endif /* R14 and future releases */
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* ERL_NIF_COMPAT_H_ */
1 c_src/google-snappy/AUTHORS
@@ -0,0 +1 @@
+opensource@google.com
202 c_src/google-snappy/COPYING
@@ -0,0 +1,202 @@
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3 c_src/google-snappy/ChangeLog
@@ -0,0 +1,3 @@
+Snappy v1.0, March 17th 2011:
+
+ * Initial version.
365 c_src/google-snappy/INSTALL
@@ -0,0 +1,365 @@
+Installation Instructions
+*************************
+
+Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,
+2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+
+ Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved. This file is offered as-is,
+without warranty of any kind.
+
+Basic Installation
+==================
+
+ Briefly, the shell commands `./configure; make; make install' should
+configure, build, and install this package. The following
+more-detailed instructions are generic; see the `README' file for
+instructions specific to this package. Some packages provide this
+`INSTALL' file but do not implement all of the features documented
+below. The lack of an optional feature in a given package is not
+necessarily a bug. More recommendations for GNU packages can be found
+in *note Makefile Conventions: (standards)Makefile Conventions.
+
+ The `configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation. It uses
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+It may also create one or more `.h' files containing system-dependent
+definitions. Finally, it creates a shell script `config.status' that
+you can run in the future to recreate the current configuration, and a
+file `config.log' containing compiler output (useful mainly for
+debugging `configure').
+
+ It can also use an optional file (typically called `config.cache'
+and enabled with `--cache-file=config.cache' or simply `-C') that saves
+the results of its tests to speed up reconfiguring. Caching is
+disabled by default to prevent problems with accidental use of stale
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+
+ If you need to do unusual things to compile the package, please try
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+some point `config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+ The file `configure.ac' (or `configure.in') is used to create
+`configure' by a program called `autoconf'. You need `configure.ac' if
+you want to change it or regenerate `configure' using a newer version
+of `autoconf'.
+
+ The simplest way to compile this package is:
+
+ 1. `cd' to the directory containing the package's source code and type
+ `./configure' to configure the package for your system.
+
+ Running `configure' might take a while. While running, it prints
+ some messages telling which features it is checking for.
+
+ 2. Type `make' to compile the package.
+
+ 3. Optionally, type `make check' to run any self-tests that come with
+ the package, generally using the just-built uninstalled binaries.
+
+ 4. Type `make install' to install the programs and any data files and
+ documentation. When installing into a prefix owned by root, it is
+ recommended that the package be configured and built as a regular
+ user, and only the `make install' phase executed with root
+ privileges.
+
+ 5. Optionally, type `make installcheck' to repeat any self-tests, but
+ this time using the binaries in their final installed location.
+ This target does not install anything. Running this target as a
+ regular user, particularly if the prior `make install' required
+ root privileges, verifies that the installation completed
+ correctly.
+
+ 6. You can remove the program binaries and object files from the
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+ This target is generally not run by end users.
+
+Compilers and Options
+=====================
+
+ Some systems require unusual options for compilation or linking that
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+for details on some of the pertinent environment variables.
+
+ You can give `configure' initial values for configuration parameters
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+is an example:
+
+ ./configure CC=c99 CFLAGS=-g LIBS=-lposix
+
+ *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+ You can compile the package for more than one kind of computer at the
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+
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+
+ On MacOS X 10.5 and later systems, you can create libraries and
+executables that work on multiple system types--known as "fat" or
+"universal" binaries--by specifying multiple `-arch' options to the
+compiler but only a single `-arch' option to the preprocessor. Like
+this:
+
+ ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+ CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+ CPP="gcc -E" CXXCPP="g++ -E"
+
+ This is not guaranteed to produce working output in all cases, you
+may have to build one architecture at a time and combine the results
+using the `lipo' tool if you have problems.
+
+Installation Names
+==================
+
+ By default, `make install' installs the package's commands under
+`/usr/local/bin', include files under `/usr/local/include', etc. You
+can specify an installation prefix other than `/usr/local' by giving
+`configure' the option `--prefix=PREFIX', where PREFIX must be an
+absolute file name.
+
+ You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files. If you
+pass the option `--exec-prefix=PREFIX' to `configure', the package uses
+PREFIX as the prefix for installing programs and libraries.
+Documentation and other data files still use the regular prefix.
+
+ In addition, if you use an unusual directory layout you can give
+options like `--bindir=DIR' to specify different values for particular
+kinds of files. Run `configure --help' for a list of the directories
+you can set and what kinds of files go in them. In general, the
+default for these options is expressed in terms of `${prefix}', so that
+specifying just `--prefix' will affect all of the other directory
+specifications that were not explicitly provided.
+
+ The most portable way to affect installation locations is to pass the
+correct locations to `configure'; however, many packages provide one or
+both of the following shortcuts of passing variable assignments to the
+`make install' command line to change installation locations without
+having to reconfigure or recompile.
+
+ The first method involves providing an override variable for each
+affected directory. For example, `make install
+prefix=/alternate/directory' will choose an alternate location for all
+directory configuration variables that were expressed in terms of
+`${prefix}'. Any directories that were specified during `configure',
+but not in terms of `${prefix}', must each be overridden at install
+time for the entire installation to be relocated. The approach of
+makefile variable overrides for each directory variable is required by
+the GNU Coding Standards, and ideally causes no recompilation.
+However, some platforms have known limitations with the semantics of
+shared libraries that end up requiring recompilation when using this
+method, particularly noticeable in packages that use GNU Libtool.
+
+ The second method involves providing the `DESTDIR' variable. For
+example, `make install DESTDIR=/alternate/directory' will prepend
+`/alternate/directory' before all installation names. The approach of
+`DESTDIR' overrides is not required by the GNU Coding Standards, and
+does not work on platforms that have drive letters. On the other hand,
+it does better at avoiding recompilation issues, and works well even
+when some directory options were not specified in terms of `${prefix}'
+at `configure' time.
+
+Optional Features
+=================
+
+ If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving `configure' the
+option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
+
+ Some packages pay attention to `--enable-FEATURE' options to
+`configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to `--with-PACKAGE' options, where PACKAGE
+is something like `gnu-as' or `x' (for the X Window System). The
+`README' should mention any `--enable-' and `--with-' options that the
+package recognizes.
+
+ For packages that use the X Window System, `configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the `configure' options `--x-includes=DIR' and
+`--x-libraries=DIR' to specify their locations.
+
+ Some packages offer the ability to configure how verbose the
+execution of `make' will be. For these packages, running `./configure
+--enable-silent-rules' sets the default to minimal output, which can be
+overridden with `make V=1'; while running `./configure
+--disable-silent-rules' sets the default to verbose, which can be
+overridden with `make V=0'.
+
+Particular systems
+==================
+
+ On HP-UX, the default C compiler is not ANSI C compatible. If GNU
+CC is not installed, it is recommended to use the following options in
+order to use an ANSI C compiler:
+
+ ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
+
+and if that doesn't work, install pre-built binaries of GCC for HP-UX.
+
+ On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
+parse its `<wchar.h>' header file. The option `-nodtk' can be used as
+a workaround. If GNU CC is not installed, it is therefore recommended
+to try
+
+ ./configure CC="cc"
+
+and if that doesn't work, try
+
+ ./configure CC="cc -nodtk"
+
+ On Solaris, don't put `/usr/ucb' early in your `PATH'. This
+directory contains several dysfunctional programs; working variants of
+these programs are available in `/usr/bin'. So, if you need `/usr/ucb'
+in your `PATH', put it _after_ `/usr/bin'.
+
+ On Haiku, software installed for all users goes in `/boot/common',
+not `/usr/local'. It is recommended to use the following options:
+
+ ./configure --prefix=/boot/common
+
+Specifying the System Type
+==========================
+
+ There may be some features `configure' cannot figure out
+automatically, but needs to determine by the type of machine the package
+will run on. Usually, assuming the package is built to be run on the
+_same_ architectures, `configure' can figure that out, but if it prints
+a message saying it cannot guess the machine type, give it the
+`--build=TYPE' option. TYPE can either be a short name for the system
+type, such as `sun4', or a canonical name which has the form:
+
+ CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+ OS
+ KERNEL-OS
+
+ See the file `config.sub' for the possible values of each field. If
+`config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+ If you are _building_ compiler tools for cross-compiling, you should
+use the option `--target=TYPE' to select the type of system they will
+produce code for.
+
+ If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with `--host=TYPE'.
+
+Sharing Defaults
+================
+
+ If you want to set default values for `configure' scripts to share,
+you can create a site shell script called `config.site' that gives
+default values for variables like `CC', `cache_file', and `prefix'.
+`configure' looks for `PREFIX/share/config.site' if it exists, then
+`PREFIX/etc/config.site' if it exists. Or, you can set the
+`CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all `configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+ Variables not defined in a site shell script can be set in the
+environment passed to `configure'. However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost. In order to avoid this problem, you should set
+them in the `configure' command line, using `VAR=value'. For example:
+
+ ./configure CC=/usr/local2/bin/gcc
+
+causes the specified `gcc' to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+Unfortunately, this technique does not work for `CONFIG_SHELL' due to
+an Autoconf bug. Until the bug is fixed you can use this workaround:
+
+ CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
+
+`configure' Invocation
+======================
+
+ `configure' recognizes the following options to control how it
+operates.
+
+`--help'
+`-h'
+ Print a summary of all of the options to `configure', and exit.
+
+`--help=short'
+`--help=recursive'
+ Print a summary of the options unique to this package's
+ `configure', and exit. The `short' variant lists options used
+ only in the top level, while the `recursive' variant lists options
+ also present in any nested packages.
+
+`--version'
+`-V'
+ Print the version of Autoconf used to generate the `configure'
+ script, and exit.
+
+`--cache-file=FILE'
+ Enable the cache: use and save the results of the tests in FILE,
+ traditionally `config.cache'. FILE defaults to `/dev/null' to
+ disable caching.
+
+`--config-cache'
+`-C'
+ Alias for `--cache-file=config.cache'.
+
+`--quiet'
+`--silent'
+`-q'
+ Do not print messages saying which checks are being made. To
+ suppress all normal output, redirect it to `/dev/null' (any error
+ messages will still be shown).
+
+`--srcdir=DIR'
+ Look for the package's source code in directory DIR. Usually
+ `configure' can determine that directory automatically.
+
+`--prefix=DIR'
+ Use DIR as the installation prefix. *note Installation Names::
+ for more details, including other options available for fine-tuning
+ the installation locations.
+
+`--no-create'
+`-n'
+ Run the configure checks, but stop before creating any output
+ files.
+
+`configure' also accepts some other, not widely useful, options. Run
+`configure --help' for more details.
+
23 c_src/google-snappy/Makefile.am
@@ -0,0 +1,23 @@
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+libsnappy_la_LDFLAGS = -version-info $(SNAPPY_LTVERSION)
+
+include_HEADERS = snappy.h snappy-sinksource.h snappy-stubs-public.h
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+
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+noinst_PROGRAMS = $(TESTS)
+
+EXTRA_DIST = autogen.sh testdata/alice29.txt testdata/asyoulik.txt testdata/baddata1.snappy testdata/baddata2.snappy testdata/baddata3.snappy testdata/cp.html testdata/fields.c testdata/geo.protodata testdata/grammar.lsp testdata/house.jpg testdata/html testdata/html_x_4 testdata/kennedy.xls testdata/kppkn.gtb testdata/lcet10.txt testdata/mapreduce-osdi-1.pdf testdata/plrabn12.txt testdata/ptt5 testdata/sum testdata/urls.10K testdata/xargs.1
+dist_doc_DATA = ChangeLog COPYING INSTALL NEWS README
+
+libtool: $(LIBTOOL_DEPS)
+ $(SHELL) ./config.status --recheck
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3 c_src/google-snappy/NEWS
@@ -0,0 +1,3 @@
+Snappy v1.0, March 17th 2011:
+
+ * Initial version.
132 c_src/google-snappy/README
@@ -0,0 +1,132 @@
+Snappy, a fast compressor/decompressor.
+
+
+Introduction
+============
+
+Snappy is a compression/decompression library. It does not aim for maximum
+compression, or compatibility with any other compression library; instead,
+it aims for very high speeds and reasonable compression. For instance,
+compared to the fastest mode of zlib, Snappy is an order of magnitude faster
+for most inputs, but the resulting compressed files are anywhere from 20% to
+100% bigger. (For more information, see "Performance", below.)
+
+Snappy has the following properties:
+
+ * Fast: Compression speeds at 250 MB/sec and beyond, with no assembler code.
+ See "Performance" below.
+ * Stable: Over the last few years, Snappy has compressed and decompressed
+ petabytes of data in Google's production environment. The Snappy bitstream
+ format is stable and will not change between versions.
+ * Robust: The Snappy decompressor is designed not to crash in the face of
+ corrupted or malicious input.
+ * Free and open source software: Snappy is licensed under the Apache license,
+ version 2.0. For more information, see the included COPYING file.
+
+Snappy has previously been called "Zippy" in some Google presentations
+and the like.
+
+
+Performance
+===========
+
+Snappy is intended to be fast. On a single core of a Core i7 processor
+in 64-bit mode, it compresses at about 250 MB/sec or more and decompresses at
+about 500 MB/sec or more. (These numbers are for the slowest inputs in our
+benchmark suite; others are much faster.) In our tests, Snappy usually
+is faster than algorithms in the same class (e.g. LZO, LZF, FastLZ, QuickLZ,
+etc.) while achieving comparable compression ratios.
+
+Typical compression ratios (based on the benchmark suite) are about 1.5-1.7x
+for plain text, about 2-4x for HTML, and of course 1.0x for JPEGs, PNGs and
+other already-compressed data. Similar numbers for zlib in its fastest mode
+are 2.6-2.8x, 3-7x and 1.0x, respectively. More sophisticated algorithms are
+capable of achieving yet higher compression rates, although usually at the
+expense of speed. Of course, compression ratio will vary significantly with
+the input.
+
+Although Snappy should be fairly portable, it is primarily optimized
+for 64-bit x86-compatible processors, and may run slower in other environments.
+In particular:
+
+ - Snappy uses 64-bit operations in several places to process more data at
+ once than would otherwise be possible.
+ - Snappy assumes unaligned 32- and 64-bit loads and stores are cheap.
+ On some platforms, these must be emulated with single-byte loads
+ and stores, which is much slower.
+ - Snappy assumes little-endian throughout, and needs to byte-swap data in
+ several places if running on a big-endian platform.
+
+Experience has shown that even heavily tuned code can be improved.
+Performance optimizations, whether for 64-bit x86 or other platforms,
+are of course most welcome; see "Contact", below.
+
+
+Usage
+=====
+
+Note that Snappy, both the implementation and the interface,
+is written in C++.
+
+To use Snappy from your own program, include the file "snappy.h" from
+your calling file, and link against the compiled library.
+
+There are many ways to call Snappy, but the simplest possible is
+
+ snappy::Compress(input, &output);
+
+and similarly
+
+ snappy::Uncompress(input, &output);
+
+where "input" and "output" are both instances of std::string.
+
+There are other interfaces that are more flexible in various ways, including
+support for custom (non-array) input sources. See the header file for more
+information.
+
+
+Tests and benchmarks
+====================
+
+When you compile Snappy, snappy_unittest is compiled in addition to the
+library itself. You do not need it to use the compressor from your own library,
+but it contains several useful components for Snappy development.
+
+First of all, it contains unit tests, verifying correctness on your machine in
+various scenarios. If you want to change or optimize Snappy, please run the
+tests to verify you have not broken anything. Note that if you have the
+Google Test library installed, unit test behavior (especially failures) will be
+significantly more user-friendly. You can find Google Test at
+
+ http://code.google.com/p/googletest/
+
+You probably also want the gflags library for handling of command-line flags;
+you can find it at
+
+ http://code.google.com/p/google-gflags/
+
+In addition to the unit tests, snappy contains microbenchmarks used to
+tune compression and decompression performance. These are automatically run
+before the unit tests, but you can disable them using the flag
+--run_microbenchmarks=false if you have gflags installed (otherwise you will
+need to edit the source).
+
+Finally, snappy can benchmark Snappy against a few other compression libraries
+(zlib, LZO, LZF, FastLZ and QuickLZ), if they were detected at configure time.
+To benchmark using a given file, give the compression algorithm you want to test
+Snappy against (e.g. --zlib) and then a list of one or more file names on the
+command line. The testdata/ directory contains the files used by the
+microbenchmark, which should provide a reasonably balanced starting point for
+benchmarking. (Note that baddata[1-3].snappy are not intended as benchmarks; they
+are used to verify correctness in the presence of corrupted data in the unit
+test.)
+
+
+Contact
+=======
+
+Snappy is distributed through Google Code. For the latest version, a bug tracker,
+and other information, see
+
+ http://code.google.com/p/snappy/
1,115 c_src/google-snappy/aclocal.m4
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+# Copyright (C) 1997, 2000, 2001, 2003, 2004, 2005, 2006, 2008
+# Free Software Foundation, Inc.
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+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
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+# Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2009
+# Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
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