forked from enlightenment/efl
add lz4 compression options to eet. remove amalgamated build too.
SVN revision: 71111
This commit is contained in:
parent
726b718812
commit
6d8004a29d
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@ -587,6 +587,10 @@
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* Force destruction of all pending file when shuting down eet.
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2012-05-14 Carsten Haitzler (The Rasterman)
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* Add LZ4/LZ4HC compression & decompression capabilities
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2012-05-15 Cedric Bail
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* Make eet_dictionary thread safe.
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@ -72,23 +72,6 @@ want_signature="yes"
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requirement_eet=""
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### Additional options to configure
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# Amalgamation
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AC_ARG_ENABLE([amalgamation],
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[AC_HELP_STRING([--enable-amalgamation], [enable generation of one single file with all source code in it, helps compiler optimizations.])],
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[if test "x${enableval}" = "xyes"; then
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do_amalgamation="yes"
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else
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do_amalgamation="no"
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fi
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],
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[do_amalgamation="no"]
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)
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AM_CONDITIONAL(EET_AMALGAMATION, test "x${do_amalgamation}" = "xyes")
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EFL_ENABLE_BIN([eet])
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# Old eet file format support
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@ -516,7 +499,6 @@ echo "------------------------------------------------------------------------"
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echo
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echo "Configuration Options Summary:"
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echo
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echo " Amalgamation.........: ${do_amalgamation}"
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echo " Secure layer.........: ${secure_layer}"
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if test "x${have_gnutls}" = "xyes" || test "x${have_openssl}" = "xyes" ; then
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echo " Cipher support.....: ${have_cipher}"
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@ -256,6 +256,39 @@ typedef enum _Eet_Error
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EET_ERROR_DECRYPT_FAILED /**< Could not decrypt contents */
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} Eet_Error; /**< Eet error identifiers */
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/**
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* @}
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*/
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/**
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* @defgroup Eet_Compression Eet Compression Levels
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* Compression modes/levels supported by Eet.
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*
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* @{
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*/
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/**
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* @enum _Eet_Compression
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* All the compression modes known by Eet.
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*/
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typedef enum _Eet_Compression
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{
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EET_COMPRESSION_NONE = 0, /**< No compression at all */
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EET_COMPRESSION_DEFAULT = 1, /**< Default compression (Zlib) */
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EET_COMPRESSION_LOW = 2, /**< Fast but minimal compression (Zlib) */
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EET_COMPRESSION_MED = 6, /**< Medium compression level (Zlib) */
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EET_COMPRESSION_HI = 9, /**< Slow but high compression level (Zlib) */
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EET_COMPRESSION_VERYFAST = 10, /**< Very fast, but lower compression ratio (LZ4HC) */
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EET_COMPRESSION_SUPERFAST = 11, /**< Very fast, but lower compression ratio (faster to compress than EET_COMPRESSION_VERYFAST) (LZ4) */
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EET_COMPRESSION_LOW2 = 3, /**< Space filler for compatibility. Don't use it */
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EET_COMPRESSION_MED1 = 4, /**< Space filler for compatibility. Don't use it */
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EET_COMPRESSION_MED2 = 5, /**< Space filler for compatibility. Don't use it */
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EET_COMPRESSION_HI1 = 7, /**< Space filler for compatibility. Don't use it */
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EET_COMPRESSION_HI2 = 8 /**< Space filler for compatibility. Don't use it */
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} Eet_Compression; /**< Eet compression modes */
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/**
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* @}
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*/
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@ -125,6 +125,8 @@ struct _Eet_File_Node
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unsigned int size;
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unsigned int data_size;
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unsigned char compression_type;
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unsigned char free_name : 1;
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unsigned char compression : 1;
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unsigned char ciphered : 1;
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@ -4,6 +4,7 @@ MAINTAINERCLEANFILES = Makefile.in
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AM_CPPFLAGS = \
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-I. \
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-I$(top_srcdir)/src/lib \
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-I$(top_srcdir)/src/lib/lz4 \
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-I$(top_builddir)/src/lib \
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-DPACKAGE_BIN_DIR=\"$(bindir)\" \
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-DPACKAGE_LIB_DIR=\"$(libdir)\" \
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@ -21,7 +22,7 @@ includesdir = $(includedir)/eet-@VMAJ@
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lib_LTLIBRARIES = libeet.la
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base_sources = \
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libeet_la_SOURCES = \
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eet_alloc.c \
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eet_lib.c \
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eet_data.c \
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@ -30,128 +31,11 @@ eet_cipher.c \
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eet_dictionary.c \
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eet_node.c \
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eet_utils.c \
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eet_connection.c
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if EET_AMALGAMATION
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nodist_libeet_la_SOURCES = eet_amalgamation.c
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eet_amalgamation.c: $(base_sources) Makefile
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-rm -f eet_amalgamation.c
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@echo "#ifdef HAVE_CONFIG_H" >> eet_amalgamation.c
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@echo "# include \"config.h\"" >> eet_amalgamation.c
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@echo "#endif" >> eet_amalgamation.c
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@echo "#ifdef HAVE_ALLOCA_H" >> eet_amalgamation.c
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@echo "# include <alloca.h>" >> eet_amalgamation.c
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@echo "#elif defined __GNUC__" >> eet_amalgamation.c
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@echo "# define alloca __builtin_alloca" >> eet_amalgamation.c
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@echo "#elif defined _AIX" >> eet_amalgamation.c
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@echo "# define alloca __alloca" >> eet_amalgamation.c
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@echo "#elif defined _MSC_VER" >> eet_amalgamation.c
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@echo "# include <malloc.h>" >> eet_amalgamation.c
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@echo "# define alloca _alloca" >> eet_amalgamation.c
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@echo "#else" >> eet_amalgamation.c
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@echo "# include <stddef.h>" >> eet_amalgamation.c
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@echo "# ifdef __cplusplus" >> eet_amalgamation.c
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@echo "#extern \"C\"" >> eet_amalgamation.c
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@echo "# endif" >> eet_amalgamation.c
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@echo "#void *alloca (size_t);" >> eet_amalgamation.c
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@echo "#endif" >> eet_amalgamation.c
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@echo "#include <stdio.h>" >> eet_amalgamation.c
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@echo "#include <string.h>" >> eet_amalgamation.c
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@echo "#include <math.h>" >> eet_amalgamation.c
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@echo "#include <ctype.h>" >> eet_amalgamation.c
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@echo "#include <limits.h>" >> eet_amalgamation.c
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@echo "#include <sys/types.h>" >> eet_amalgamation.c
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@echo "#include <sys/stat.h>" >> eet_amalgamation.c
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@echo "#ifdef HAVE_SIGNATURE" >> eet_amalgamation.c
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@echo "# include <sys/mman.h>" >> eet_amalgamation.c
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@echo "#endif" >> eet_amalgamation.c
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@echo "#include <setjmp.h>" >> eet_amalgamation.c
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@echo "#include <errno.h>" >> eet_amalgamation.c
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@echo "#include <time.h>" >> eet_amalgamation.c
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@echo "#include <fnmatch.h>" >> eet_amalgamation.c
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@echo "#include <fcntl.h>" >> eet_amalgamation.c
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@echo "#ifdef _WIN32" >> eet_amalgamation.c
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@echo "# include <winsock2.h>" >> eet_amalgamation.c
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@echo "#endif" >> eet_amalgamation.c
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@echo "#ifndef _MSC_VER" >> eet_amalgamation.c
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@echo "# include <unistd.h>" >> eet_amalgamation.c
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@echo "#endif" >> eet_amalgamation.c
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@echo "#ifdef HAVE_NETINET_IN_H" >> eet_amalgamation.c
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@echo "# include <netinet/in.h>" >> eet_amalgamation.c
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@echo "#endif" >> eet_amalgamation.c
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@echo "#ifdef HAVE_GNUTLS" >> eet_amalgamation.c
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@echo "# include <gnutls/gnutls.h>" >> eet_amalgamation.c
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@echo "# include <gcrypt.h>" >> eet_amalgamation.c
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@echo "#endif" >> eet_amalgamation.c
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@echo "#ifdef HAVE_OPENSSL" >> eet_amalgamation.c
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@echo "# include <openssl/err.h>" >> eet_amalgamation.c
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@echo "# include <openssl/evp.h>" >> eet_amalgamation.c
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@echo "# include <openssl/sha.h>" >> eet_amalgamation.c
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@echo "#endif" >> eet_amalgamation.c
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@echo "#ifdef HAVE_SIGNATURE" >> eet_amalgamation.c
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@echo "# ifdef HAVE_GNUTLS" >> eet_amalgamation.c
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@echo "# include <gnutls/gnutls.h>" >> eet_amalgamation.c
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@echo "# include <gnutls/x509.h>" >> eet_amalgamation.c
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@echo "# else" >> eet_amalgamation.c
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@echo "# include <openssl/rsa.h>" >> eet_amalgamation.c
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@echo "# include <openssl/objects.h>" >> eet_amalgamation.c
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@echo "# include <openssl/err.h>" >> eet_amalgamation.c
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@echo "# include <openssl/ssl.h>" >> eet_amalgamation.c
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@echo "# include <openssl/dh.h>" >> eet_amalgamation.c
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@echo "# include <openssl/dsa.h>" >> eet_amalgamation.c
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@echo "# include <openssl/evp.h>" >> eet_amalgamation.c
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@echo "# include <openssl/x509.h>" >> eet_amalgamation.c
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@echo "# include <openssl/pem.h>" >> eet_amalgamation.c
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@echo "# endif" >> eet_amalgamation.c
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@echo "#endif" >> eet_amalgamation.c
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@echo "#ifdef HAVE_CIPHER" >> eet_amalgamation.c
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@echo "# ifdef HAVE_GNUTLS" >> eet_amalgamation.c
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@echo "# include <gnutls/x509.h>" >> eet_amalgamation.c
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@echo "# include <gcrypt.h>" >> eet_amalgamation.c
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@echo "# else" >> eet_amalgamation.c
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@echo "# include <openssl/evp.h>" >> eet_amalgamation.c
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@echo "# include <openssl/hmac.h>" >> eet_amalgamation.c
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@echo "# include <openssl/rand.h>" >> eet_amalgamation.c
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@echo "# endif" >> eet_amalgamation.c
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@echo "#endif" >> eet_amalgamation.c
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@echo "#include <zlib.h>" >> eet_amalgamation.c
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@echo "#include <jpeglib.h>" >> eet_amalgamation.c
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@echo "#ifdef HAVE_EVIL" >> eet_amalgamation.c
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@echo "# include <Evil.h>" >> eet_amalgamation.c
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@echo "#endif" >> eet_amalgamation.c
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@echo "#include <Eet.h>" >> eet_amalgamation.c
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@echo "#include \"Eet_private.h\"" >> eet_amalgamation.c
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@echo "#include \"Eet.h\"" >> eet_amalgamation.c
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@for f in $(base_sources); do \
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if [ `echo $$f | sed -e 's/^...\(.\).*/\1/'` != '/' ]; then \
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file="$(srcdir)/$$f" ; \
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else \
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file="$$f" ; \
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fi ; \
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echo "/* file: $$file */" >> eet_amalgamation.c; \
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grep -v -e '^# *include \+.\(config\|\|Evil\|Eina\|stdio\|string\|math\|ctype\|limits\|sys/types\|sys/stat\|sys/mman\|setjmp\|errno\|time\|fnmatch\|fcntl\|winsock2\|unistd\|netinet/in\|gnutls/gnutls\|gcrypt\|gnutls/x509\|openssl/rsa\|openssl/objects\|openssl/err\|openssl/ssl\|openssl/dh\|openssl/dsa\|openssl/evp\|openssl/pem\|openssl/sha\|openssl/hmac\|openssl/x509\|openssl/rand\|zlib\|jpeglib\|Eet_private\|Eet\)[.]h.*' $$file >> eet_amalgamation.c; \
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done
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@echo "eet_amalgamation.c generated"
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else
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libeet_la_SOURCES = $(base_sources)
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endif
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eet_connection.c \
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lz4/lz4.c \
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lz4/lz4.h \
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lz4/lz4hc.c \
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lz4/lz4hc.h
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libeet_la_CFLAGS = @EET_CFLAGS@ @DEBUG_CFLAGS@
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libeet_la_LIBADD = @GNUTLS_LIBS@ @OPENSSL_LIBS@ @EFL_COVERAGE_LIBS@ @EET_LIBS@ @EINA_LIBS@ @EVIL_LIBS@ -lz -ljpeg -lm
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@ -40,6 +40,9 @@ void *alloca(size_t);
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#include "Eet.h"
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#include "Eet_private.h"
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#include "lz4.h"
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#include "lz4hc.h"
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/*---*/
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typedef struct _JPEG_error_mgr *emptr;
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@ -742,55 +745,68 @@ eet_data_image_lossless_compressed_convert(int *size,
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}
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{
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unsigned char *d;
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unsigned char *comp;
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int *header;
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int ret;
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uLongf buflen;
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d = malloc((w * h * 4) + (8 * 4));
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if (!d)
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return NULL;
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unsigned char *d, *comp;
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int *header, ret, ok = 1;
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uLongf buflen = 0;
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buflen = (((w * h * 101) / 100) + 3) * 4;
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ret = LZ4_compressBound((w * h * 4));
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if ((ret > 0) && ((uLongf)ret > buflen)) buflen = ret;
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comp = malloc(buflen);
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if (!comp)
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if (!comp) return NULL;
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switch (compression)
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{
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free(d);
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case EET_COMPRESSION_VERYFAST:
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ret = LZ4_compressHC((const char *)data, (char *)comp,
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(w * h * 4));
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if (ret <= 0) ok = 0;
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buflen = ret;
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break;
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case EET_COMPRESSION_SUPERFAST:
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ret = LZ4_compress((const char *)data, (char *)comp,
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(w * h * 4));
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if (ret <= 0) ok = 0;
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buflen = ret;
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break;
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default: /* zlib etc. */
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ret = compress2((Bytef *)comp, &buflen, (Bytef *)(data),
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(uLong)(w * h * 4), compression);
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if (ret != Z_OK) ok = 0;
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break;
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}
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if ((!ok) || (buflen > (w * h * 4)))
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{
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free(comp);
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*size = -1;
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return NULL;
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}
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d = malloc((8 * sizeof(int)) + buflen);
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if (!d)
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{
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free(comp);
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return NULL;
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}
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header = (int *)d;
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memset(d, 0, 32);
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memset(d, 0, 8 * sizeof(int));
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header[0] = 0xac1dfeed;
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header[1] = w;
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header[2] = h;
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header[3] = alpha;
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header[4] = compression;
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memcpy(d + 32, data, w * h * 4);
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if (_eet_image_words_bigendian)
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{
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unsigned int i;
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for (i = 0; i < ((w * h) + 8); i++) SWAP32(header[i]);
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}
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ret = compress2((Bytef *)comp, &buflen,
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(Bytef *)(d + 32),
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(uLong)(w * h * 4),
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compression);
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if (ret != Z_OK || buflen > (w * h * 4))
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{
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free(comp);
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free(d);
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*size = -1;
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return NULL;
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}
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memcpy(d + 32, comp, buflen);
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*size = (8 * 4) + buflen;
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memcpy(d + (8 * sizeof(int)), comp, buflen);
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*size = (8 * sizeof(int)) + buflen;
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free(comp);
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return d;
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}
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@ -1577,35 +1593,75 @@ _eet_data_image_decode_inside(const void *data,
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w, h, row_stride);
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else
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{
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if (src_h == h && src_w == w && row_stride == src_w * 4)
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if ((src_h == h) && (src_w == w) && (row_stride == src_w * 4))
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{
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uLongf dlen;
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dlen = w * h * 4;
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uncompress((Bytef *)d, &dlen, (Bytef *)body,
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(uLongf)(size - 32));
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switch (comp)
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{
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case EET_COMPRESSION_VERYFAST:
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case EET_COMPRESSION_SUPERFAST:
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if (LZ4_uncompress((const char *)body,
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(char *)d, w * h * 4)
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!= (size - 32)) return 0;
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break;
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default:
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{
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uLongf dlen = w * h * 4;
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if (uncompress((Bytef *)d, &dlen, (Bytef *)body,
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(uLongf)(size - 32)) != Z_OK)
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return 0;
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}
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break;
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}
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}
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else
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{
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Bytef *dtmp;
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uLongf dlen = src_w * src_h * 4;
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/* FIXME: This could create a huge alloc. So compressed
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data and tile could not always work. */
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dtmp = malloc(dlen);
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if (!dtmp)
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return 0;
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uncompress(dtmp, &dlen, (Bytef *)body, (uLongf)(size - 32));
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_eet_data_image_copy_buffer((unsigned int *)dtmp,
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src_x, src_y, src_w, d,
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w, h, row_stride);
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free(dtmp);
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switch (comp)
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{
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case EET_COMPRESSION_VERYFAST:
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case EET_COMPRESSION_SUPERFAST:
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{
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char *dtmp;
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dtmp = malloc(src_w * src_h * 4);
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if (!dtmp) return 0;
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if (LZ4_uncompress((const char *)body,
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dtmp, w * h * 4)
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!= (size - 32))
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{
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free(dtmp);
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return 0;
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}
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_eet_data_image_copy_buffer((unsigned int *)dtmp,
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src_x, src_y, src_w, d,
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w, h, row_stride);
|
||||
free(dtmp);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
{
|
||||
Bytef *dtmp;
|
||||
uLongf dlen = src_w * src_h * 4;
|
||||
|
||||
/* FIXME: This could create a huge alloc. So
|
||||
compressed data and tile could not always work.*/
|
||||
dtmp = malloc(dlen);
|
||||
if (!dtmp) return 0;
|
||||
|
||||
if (uncompress(dtmp, &dlen, (Bytef *)body,
|
||||
(uLongf)(size - 32)) != Z_OK)
|
||||
{
|
||||
free(dtmp);
|
||||
return 0;
|
||||
}
|
||||
_eet_data_image_copy_buffer((unsigned int *)dtmp,
|
||||
src_x, src_y, src_w, d,
|
||||
w, h, row_stride);
|
||||
free(dtmp);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Fix swapiness. */
|
||||
if (_eet_image_words_bigendian)
|
||||
{
|
||||
|
|
|
@ -66,6 +66,9 @@ GCRY_THREAD_OPTION_PTHREAD_IMPL;
|
|||
#include "Eet.h"
|
||||
#include "Eet_private.h"
|
||||
|
||||
#include "lz4.h"
|
||||
#include "lz4hc.h"
|
||||
|
||||
#ifndef O_BINARY
|
||||
# define O_BINARY 0
|
||||
#endif
|
||||
|
@ -442,6 +445,7 @@ eet_flush2(Eet_File *ef)
|
|||
int ibuf[EET_FILE2_DIRECTORY_ENTRY_COUNT];
|
||||
|
||||
flag = (efn->alias << 2) | (efn->ciphered << 1) | efn->compression;
|
||||
flag |= efn->compression_type << 3;
|
||||
|
||||
ibuf[0] = (int)htonl((unsigned int)efn->offset);
|
||||
ibuf[1] = (int)htonl((unsigned int)efn->size);
|
||||
|
@ -864,6 +868,7 @@ eet_internal_read2(Eet_File *ef)
|
|||
efn->compression = flag & 0x1 ? 1 : 0;
|
||||
efn->ciphered = flag & 0x2 ? 1 : 0;
|
||||
efn->alias = flag & 0x4 ? 1 : 0;
|
||||
efn->compression_type = (flag >> 3) & 0xff;
|
||||
|
||||
#define EFN_TEST(Test, Ef, Efn) \
|
||||
if (eet_test_close(Test, Ef)) \
|
||||
|
@ -1719,7 +1724,7 @@ eet_read_cipher(Eet_File *ef,
|
|||
void *tmp_data = NULL;
|
||||
void *data_deciphered = NULL;
|
||||
unsigned int data_deciphered_sz = 0;
|
||||
int free_tmp = 0;
|
||||
int free_tmp = 0, ret;
|
||||
int compr_size = efn->size;
|
||||
uLongf dlen;
|
||||
|
||||
|
@ -1765,12 +1770,27 @@ eet_read_cipher(Eet_File *ef,
|
|||
|
||||
/* decompress it */
|
||||
dlen = size;
|
||||
if (uncompress((Bytef *)data, &dlen,
|
||||
tmp_data, (uLongf)compr_size))
|
||||
switch (efn->compression_type)
|
||||
{
|
||||
if (free_tmp)
|
||||
free(tmp_data);
|
||||
goto on_error;
|
||||
case EET_COMPRESSION_VERYFAST:
|
||||
case EET_COMPRESSION_SUPERFAST:
|
||||
ret = LZ4_uncompress(tmp_data, data, dlen);
|
||||
if (ret != compr_size)
|
||||
{
|
||||
if (free_tmp)
|
||||
free(tmp_data);
|
||||
goto on_error;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
if (uncompress((Bytef *)data, &dlen,
|
||||
tmp_data, (uLongf)compr_size) != Z_OK)
|
||||
{
|
||||
if (free_tmp)
|
||||
free(tmp_data);
|
||||
goto on_error;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if (free_tmp)
|
||||
|
@ -1821,7 +1841,7 @@ eet_read_direct(Eet_File *ef,
|
|||
{
|
||||
Eet_File_Node *efn;
|
||||
const char *data = NULL;
|
||||
int size = 0;
|
||||
int size = 0, ret;
|
||||
|
||||
if (size_ret)
|
||||
*size_ret = 0;
|
||||
|
@ -1862,23 +1882,46 @@ eet_read_direct(Eet_File *ef,
|
|||
/* handle alias case */
|
||||
if (efn->compression)
|
||||
{
|
||||
const void *retptr;
|
||||
char *tmp;
|
||||
int compr_size = efn->size;
|
||||
uLongf dlen;
|
||||
|
||||
tmp = alloca(sizeof (compr_size));
|
||||
dlen = size;
|
||||
|
||||
if (uncompress((Bytef *)tmp, &dlen, (Bytef *)data,
|
||||
(uLongf)compr_size))
|
||||
goto on_error;
|
||||
|
||||
|
||||
tmp = malloc(compr_size);
|
||||
if (!tmp) goto on_error;
|
||||
switch (efn->compression_type)
|
||||
{
|
||||
case EET_COMPRESSION_VERYFAST:
|
||||
case EET_COMPRESSION_SUPERFAST:
|
||||
ret = LZ4_uncompress(data, tmp, size);
|
||||
if (ret != compr_size)
|
||||
{
|
||||
free(tmp);
|
||||
goto on_error;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
dlen = size;
|
||||
|
||||
if (uncompress((Bytef *)tmp, &dlen, (Bytef *)data,
|
||||
(uLongf)compr_size))
|
||||
{
|
||||
free(tmp);
|
||||
goto on_error;
|
||||
}
|
||||
}
|
||||
|
||||
if (tmp[compr_size - 1] != '\0')
|
||||
goto on_error;
|
||||
|
||||
{
|
||||
free(tmp);
|
||||
goto on_error;
|
||||
}
|
||||
|
||||
UNLOCK_FILE(ef);
|
||||
|
||||
return eet_read_direct(ef, tmp, size_ret);
|
||||
|
||||
retptr = eet_read_direct(ef, tmp, size_ret);
|
||||
free(tmp);
|
||||
return retptr;
|
||||
}
|
||||
|
||||
if (!data)
|
||||
|
@ -1893,8 +1936,7 @@ eet_read_direct(Eet_File *ef,
|
|||
}
|
||||
else
|
||||
/* uncompressed data */
|
||||
if (efn->compression == 0
|
||||
&& efn->ciphered == 0)
|
||||
if ((efn->compression == 0) && (efn->ciphered == 0))
|
||||
data = efn->data ? efn->data : ef->data + efn->offset; /* compressed data */
|
||||
else
|
||||
data = NULL;
|
||||
|
@ -1918,7 +1960,7 @@ eet_alias_get(Eet_File *ef,
|
|||
{
|
||||
Eet_File_Node *efn;
|
||||
const char *data = NULL;
|
||||
int size = 0;
|
||||
int size = 0, ret;
|
||||
|
||||
/* check to see its' an eet file pointer */
|
||||
if (eet_check_pointer(ef))
|
||||
|
@ -1955,23 +1997,43 @@ eet_alias_get(Eet_File *ef,
|
|||
/* handle alias case */
|
||||
if (efn->compression)
|
||||
{
|
||||
const char *retptr;
|
||||
char *tmp;
|
||||
int compr_size = efn->size;
|
||||
uLongf dlen;
|
||||
|
||||
tmp = alloca(sizeof (compr_size));
|
||||
dlen = size;
|
||||
|
||||
if (uncompress((Bytef *)tmp, &dlen, (Bytef *)data,
|
||||
(uLongf)compr_size))
|
||||
goto on_error;
|
||||
|
||||
|
||||
tmp = malloc(compr_size);
|
||||
if (!tmp) goto on_error;
|
||||
switch (efn->compression_type)
|
||||
{
|
||||
case EET_COMPRESSION_VERYFAST:
|
||||
case EET_COMPRESSION_SUPERFAST:
|
||||
ret = LZ4_uncompress(data, tmp, size);
|
||||
if (ret != compr_size)
|
||||
{
|
||||
free(tmp);
|
||||
goto on_error;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
dlen = size;
|
||||
|
||||
if (uncompress((Bytef *)tmp, &dlen, (Bytef *)data,
|
||||
(uLongf)compr_size))
|
||||
{
|
||||
free(tmp);
|
||||
goto on_error;
|
||||
}
|
||||
}
|
||||
|
||||
if (tmp[compr_size - 1] != '\0')
|
||||
goto on_error;
|
||||
|
||||
UNLOCK_FILE(ef);
|
||||
|
||||
return eina_stringshare_add(tmp);
|
||||
retptr = eina_stringshare_add(tmp);
|
||||
free(tmp);
|
||||
return retptr;
|
||||
}
|
||||
|
||||
if (!data)
|
||||
|
@ -1998,8 +2060,7 @@ eet_alias(Eet_File *ef,
|
|||
Eet_File_Node *efn;
|
||||
void *data2;
|
||||
Eina_Bool exists_already = EINA_FALSE;
|
||||
int data_size;
|
||||
int hash;
|
||||
int data_size, ret, hash, slen;
|
||||
|
||||
/* check to see its' an eet file pointer */
|
||||
if (eet_check_pointer(ef))
|
||||
|
@ -2048,32 +2109,64 @@ eet_alias(Eet_File *ef,
|
|||
/* figure hash bucket */
|
||||
hash = _eet_hash_gen(name, ef->header->directory->size);
|
||||
|
||||
slen = strlen(destination) + 1;
|
||||
data_size = comp ?
|
||||
12 + (((strlen(destination) + 1) * 101) / 100)
|
||||
: strlen(destination) + 1;
|
||||
|
||||
12 + ((slen * 101) / 100)
|
||||
: slen;
|
||||
if (comp)
|
||||
{
|
||||
ret = LZ4_compressBound(slen);
|
||||
if ((ret > 0) && (ret > data_size)) data_size = ret;
|
||||
}
|
||||
|
||||
data2 = malloc(data_size);
|
||||
if (!data2)
|
||||
goto on_error;
|
||||
if (!data2) goto on_error;
|
||||
|
||||
/* if we want to compress */
|
||||
if (comp)
|
||||
{
|
||||
uLongf buflen;
|
||||
|
||||
/* compress the data with max compression */
|
||||
buflen = (uLongf)data_size;
|
||||
if (compress2((Bytef *)data2, &buflen, (Bytef *)destination,
|
||||
(uLong)strlen(destination) + 1,
|
||||
Z_BEST_COMPRESSION) != Z_OK)
|
||||
switch (comp)
|
||||
{
|
||||
free(data2);
|
||||
goto on_error;
|
||||
case EET_COMPRESSION_VERYFAST:
|
||||
ret = LZ4_compressHC((const char *)destination, (char *)data2,
|
||||
slen);
|
||||
if (ret <= 0)
|
||||
{
|
||||
free(data2);
|
||||
goto on_error;
|
||||
}
|
||||
data_size = ret;
|
||||
break;
|
||||
case EET_COMPRESSION_SUPERFAST:
|
||||
ret = LZ4_compress((const char *)destination, (char *)data2,
|
||||
slen);
|
||||
if (ret <= 0)
|
||||
{
|
||||
free(data2);
|
||||
goto on_error;
|
||||
}
|
||||
data_size = ret;
|
||||
break;
|
||||
default:
|
||||
{
|
||||
uLongf buflen;
|
||||
|
||||
/* compress the data with max compression */
|
||||
buflen = (uLongf)data_size;
|
||||
if (compress2((Bytef *)data2, &buflen,
|
||||
(const Bytef *)destination,
|
||||
(uLong)slen, Z_BEST_COMPRESSION) != Z_OK)
|
||||
{
|
||||
free(data2);
|
||||
goto on_error;
|
||||
}
|
||||
/* record compressed chunk size */
|
||||
data_size = (int)buflen;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
/* record compressed chunk size */
|
||||
data_size = (int)buflen;
|
||||
if (data_size < 0 || data_size >= (int)(strlen(destination) + 1))
|
||||
if ((data_size < 0) ||
|
||||
(data_size >= (int)(strlen(destination) + 1)))
|
||||
{
|
||||
comp = 0;
|
||||
data_size = strlen(destination) + 1;
|
||||
|
@ -2083,13 +2176,11 @@ eet_alias(Eet_File *ef,
|
|||
void *data3;
|
||||
|
||||
data3 = realloc(data2, data_size);
|
||||
if (data3)
|
||||
data2 = data3;
|
||||
if (data3) data2 = data3;
|
||||
}
|
||||
}
|
||||
|
||||
if (!comp)
|
||||
memcpy(data2, destination, data_size);
|
||||
|
||||
if (!comp) memcpy(data2, destination, data_size);
|
||||
|
||||
/* Does this node already exist? */
|
||||
for (efn = ef->header->directory->nodes[hash]; efn; efn = efn->next)
|
||||
|
@ -2101,13 +2192,13 @@ eet_alias(Eet_File *ef,
|
|||
efn->alias = 1;
|
||||
efn->ciphered = 0;
|
||||
efn->compression = !!comp;
|
||||
efn->compression_type = comp;
|
||||
efn->size = data_size;
|
||||
efn->data_size = strlen(destination) + 1;
|
||||
efn->data = data2;
|
||||
/* Put the offset above the limit to avoid direct access */
|
||||
/* Put the offset above the limit to avoid direct access */
|
||||
efn->offset = ef->data_size + 1;
|
||||
exists_already = EINA_TRUE;
|
||||
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
@ -2131,6 +2222,7 @@ eet_alias(Eet_File *ef,
|
|||
efn->alias = 1;
|
||||
efn->ciphered = 0;
|
||||
efn->compression = !!comp;
|
||||
efn->compression_type = comp;
|
||||
efn->size = data_size;
|
||||
efn->data_size = strlen(destination) + 1;
|
||||
efn->data = data2;
|
||||
|
@ -2157,9 +2249,7 @@ eet_write_cipher(Eet_File *ef,
|
|||
{
|
||||
Eet_File_Node *efn;
|
||||
void *data2 = NULL;
|
||||
int exists_already = 0;
|
||||
int data_size;
|
||||
int hash;
|
||||
int exists_already = 0, data_size, hash, ret;
|
||||
|
||||
/* check to see its' an eet file pointer */
|
||||
if (eet_check_pointer(ef))
|
||||
|
@ -2208,8 +2298,15 @@ eet_write_cipher(Eet_File *ef,
|
|||
/* figure hash bucket */
|
||||
hash = _eet_hash_gen(name, ef->header->directory->size);
|
||||
|
||||
UNLOCK_FILE(ef);
|
||||
|
||||
data_size = comp ? 12 + ((size * 101) / 100) : size;
|
||||
|
||||
if (comp)
|
||||
{
|
||||
ret = LZ4_compressBound(size);
|
||||
if ((ret > 0) && (ret > data_size)) data_size = ret;
|
||||
}
|
||||
|
||||
if (comp || !cipher_key)
|
||||
{
|
||||
data2 = malloc(data_size);
|
||||
|
@ -2220,20 +2317,46 @@ eet_write_cipher(Eet_File *ef,
|
|||
/* if we want to compress */
|
||||
if (comp)
|
||||
{
|
||||
uLongf buflen;
|
||||
|
||||
/* compress the data with max compression */
|
||||
buflen = (uLongf)data_size;
|
||||
if (compress2((Bytef *)data2, &buflen, (Bytef *)data,
|
||||
(uLong)size, Z_BEST_COMPRESSION) != Z_OK)
|
||||
switch (comp)
|
||||
{
|
||||
free(data2);
|
||||
goto on_error;
|
||||
}
|
||||
case EET_COMPRESSION_VERYFAST:
|
||||
ret = LZ4_compressHC((const char *)data, (char *)data2, size);
|
||||
if (ret <= 0)
|
||||
{
|
||||
free(data2);
|
||||
LOCK_FILE(ef);
|
||||
goto on_error;
|
||||
}
|
||||
data_size = ret;
|
||||
break;
|
||||
case EET_COMPRESSION_SUPERFAST:
|
||||
ret = LZ4_compress((const char *)data, (char *)data2, size);
|
||||
if (ret <= 0)
|
||||
{
|
||||
free(data2);
|
||||
LOCK_FILE(ef);
|
||||
goto on_error;
|
||||
}
|
||||
data_size = ret;
|
||||
break;
|
||||
default:
|
||||
{
|
||||
uLongf buflen;
|
||||
|
||||
/* record compressed chunk size */
|
||||
data_size = (int)buflen;
|
||||
if (data_size < 0 || data_size >= size)
|
||||
/* compress the data with max compression */
|
||||
buflen = (uLongf)data_size;
|
||||
if (compress2((Bytef *)data2, &buflen, (Bytef *)data,
|
||||
(uLong)size, Z_BEST_COMPRESSION) != Z_OK)
|
||||
{
|
||||
free(data2);
|
||||
LOCK_FILE(ef);
|
||||
goto on_error;
|
||||
}
|
||||
/* record compressed chunk size */
|
||||
data_size = (int)buflen;
|
||||
}
|
||||
}
|
||||
if ((data_size < 0) || (data_size >= size))
|
||||
{
|
||||
comp = 0;
|
||||
data_size = size;
|
||||
|
@ -2276,6 +2399,7 @@ eet_write_cipher(Eet_File *ef,
|
|||
if (!comp)
|
||||
memcpy(data2, data, size);
|
||||
|
||||
LOCK_FILE(ef);
|
||||
/* Does this node already exist? */
|
||||
for (efn = ef->header->directory->nodes[hash]; efn; efn = efn->next)
|
||||
{
|
||||
|
@ -2286,10 +2410,11 @@ eet_write_cipher(Eet_File *ef,
|
|||
efn->alias = 0;
|
||||
efn->ciphered = cipher_key ? 1 : 0;
|
||||
efn->compression = !!comp;
|
||||
efn->compression_type = comp;
|
||||
efn->size = data_size;
|
||||
efn->data_size = size;
|
||||
efn->data = data2;
|
||||
/* Put the offset above the limit to avoid direct access */
|
||||
/* Put the offset above the limit to avoid direct access */
|
||||
efn->offset = ef->data_size + 1;
|
||||
exists_already = 1;
|
||||
break;
|
||||
|
@ -2315,6 +2440,7 @@ eet_write_cipher(Eet_File *ef,
|
|||
efn->alias = 0;
|
||||
efn->ciphered = cipher_key ? 1 : 0;
|
||||
efn->compression = !!comp;
|
||||
efn->compression_type = comp;
|
||||
efn->size = data_size;
|
||||
efn->data_size = size;
|
||||
efn->data = data2;
|
||||
|
|
|
@ -0,0 +1,819 @@
|
|||
/*
|
||||
LZ4 - Fast LZ compression algorithm
|
||||
Copyright (C) 2011-2012, Yann Collet.
|
||||
BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
|
||||
|
||||
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.
|
||||
|
||||
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.
|
||||
|
||||
You can contact the author at :
|
||||
- LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
|
||||
- LZ4 source repository : http://code.google.com/p/lz4/
|
||||
*/
|
||||
|
||||
//**************************************
|
||||
// Tuning parameters
|
||||
//**************************************
|
||||
// COMPRESSIONLEVEL :
|
||||
// Increasing this value improves compression ratio
|
||||
// Lowering this value reduces memory usage
|
||||
// Reduced memory usage typically improves speed, due to cache effect (ex : L1 32KB for Intel, L1 64KB for AMD)
|
||||
// Memory usage formula : N->2^(N+2) Bytes (examples : 12 -> 16KB ; 17 -> 512KB)
|
||||
#define COMPRESSIONLEVEL 12
|
||||
|
||||
// NOTCOMPRESSIBLE_CONFIRMATION :
|
||||
// Decreasing this value will make the algorithm skip faster data segments considered "incompressible"
|
||||
// This may decrease compression ratio dramatically, but will be faster on incompressible data
|
||||
// Increasing this value will make the algorithm search more before declaring a segment "incompressible"
|
||||
// This could improve compression a bit, but will be slower on incompressible data
|
||||
// The default value (6) is recommended
|
||||
#define NOTCOMPRESSIBLE_CONFIRMATION 6
|
||||
|
||||
// LZ4_COMPRESSMIN :
|
||||
// Compression function will *fail* if it is not successful at compressing input by at least LZ4_COMPRESSMIN bytes
|
||||
// Since the compression function stops working prematurely, it results in a speed gain
|
||||
// The output however is unusable. Compression function result will be zero.
|
||||
// Default : 0 = disabled
|
||||
#define LZ4_COMPRESSMIN 0
|
||||
|
||||
// BIG_ENDIAN_NATIVE_BUT_INCOMPATIBLE :
|
||||
// This will provide a boost to performance for big endian cpu, but the resulting compressed stream will be incompatible with little-endian CPU.
|
||||
// You can set this option to 1 in situations where data will stay within closed environment
|
||||
// This option is useless on Little_Endian CPU (such as x86)
|
||||
//#define BIG_ENDIAN_NATIVE_BUT_INCOMPATIBLE 1
|
||||
|
||||
|
||||
|
||||
//**************************************
|
||||
// CPU Feature Detection
|
||||
//**************************************
|
||||
// 32 or 64 bits ?
|
||||
#if (defined(__x86_64__) || defined(__x86_64) || defined(__amd64__) || defined(__amd64) || defined(__ppc64__) || defined(_WIN64) || defined(__LP64__) || defined(_LP64) ) // Detects 64 bits mode
|
||||
# define LZ4_ARCH64 1
|
||||
#else
|
||||
# define LZ4_ARCH64 0
|
||||
#endif
|
||||
|
||||
// Little Endian or Big Endian ?
|
||||
// Note : overwrite the below #define if you know your architecture endianess
|
||||
#if (defined(__BIG_ENDIAN__) || defined(__BIG_ENDIAN) || defined(_BIG_ENDIAN) || defined(_ARCH_PPC) || defined(__PPC__) || defined(__PPC) || defined(PPC) || defined(__powerpc__) || defined(__powerpc) || defined(powerpc) || ((defined(__BYTE_ORDER__)&&(__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))) )
|
||||
# define LZ4_BIG_ENDIAN 1
|
||||
#else
|
||||
// Little Endian assumed. PDP Endian and other very rare endian format are unsupported.
|
||||
#endif
|
||||
|
||||
// Unaligned memory access is automatically enabled for "common" CPU, such as x86.
|
||||
// For others CPU, the compiler will be more cautious, and insert extra code to ensure aligned access is respected
|
||||
// If you know your target CPU supports unaligned memory access, you may want to force this option manually to improve performance
|
||||
#if defined(__ARM_FEATURE_UNALIGNED)
|
||||
# define LZ4_FORCE_UNALIGNED_ACCESS 1
|
||||
#endif
|
||||
|
||||
// Define this parameter if your target system or compiler does not support hardware bit count
|
||||
#if defined(_MSC_VER) && defined(_WIN32_WCE) // Visual Studio for Windows CE does not support Hardware bit count
|
||||
# define LZ4_FORCE_SW_BITCOUNT
|
||||
#endif
|
||||
|
||||
|
||||
//**************************************
|
||||
// Compiler Options
|
||||
//**************************************
|
||||
#if __STDC_VERSION__ >= 199901L // C99
|
||||
/* "restrict" is a known keyword */
|
||||
#else
|
||||
# define restrict // Disable restrict
|
||||
#endif
|
||||
|
||||
#define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
|
||||
|
||||
#ifdef _MSC_VER // Visual Studio
|
||||
# define inline __forceinline // Visual is not C99, but supports some kind of inline
|
||||
# if LZ4_ARCH64 // 64-bit
|
||||
# pragma intrinsic(_BitScanForward64) // For Visual 2005
|
||||
# pragma intrinsic(_BitScanReverse64) // For Visual 2005
|
||||
# else
|
||||
# pragma intrinsic(_BitScanForward) // For Visual 2005
|
||||
# pragma intrinsic(_BitScanReverse) // For Visual 2005
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifdef _MSC_VER
|
||||
# define lz4_bswap16(x) _byteswap_ushort(x)
|
||||
#else
|
||||
# define lz4_bswap16(x) ((unsigned short int) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)))
|
||||
#endif
|
||||
|
||||
#if (GCC_VERSION >= 302) || (__INTEL_COMPILER >= 800) || defined(__clang__)
|
||||
# define expect(expr,value) (__builtin_expect ((expr),(value)) )
|
||||
#else
|
||||
# define expect(expr,value) (expr)
|
||||
#endif
|
||||
|
||||
#define likely(expr) expect((expr) != 0, 1)
|
||||
#define unlikely(expr) expect((expr) != 0, 0)
|
||||
|
||||
|
||||
//**************************************
|
||||
// Includes
|
||||
//**************************************
|
||||
#include <stdlib.h> // for malloc
|
||||
#include <string.h> // for memset
|
||||
#include "lz4.h"
|
||||
|
||||
|
||||
//**************************************
|
||||
// Basic Types
|
||||
//**************************************
|
||||
#if defined(_MSC_VER) // Visual Studio does not support 'stdint' natively
|
||||
# define BYTE unsigned __int8
|
||||
# define U16 unsigned __int16
|
||||
# define U32 unsigned __int32
|
||||
# define S32 __int32
|
||||
# define U64 unsigned __int64
|
||||
#else
|
||||
# include <stdint.h>
|
||||
# define BYTE uint8_t
|
||||
# define U16 uint16_t
|
||||
# define U32 uint32_t
|
||||
# define S32 int32_t
|
||||
# define U64 uint64_t
|
||||
#endif
|
||||
|
||||
#ifndef LZ4_FORCE_UNALIGNED_ACCESS
|
||||
# pragma pack(push, 1)
|
||||
#endif
|
||||
|
||||
typedef struct _U16_S { U16 v; } U16_S;
|
||||
typedef struct _U32_S { U32 v; } U32_S;
|
||||
typedef struct _U64_S { U64 v; } U64_S;
|
||||
|
||||
#ifndef LZ4_FORCE_UNALIGNED_ACCESS
|
||||
# pragma pack(pop)
|
||||
#endif
|
||||
|
||||
#define A64(x) (((U64_S *)(x))->v)
|
||||
#define A32(x) (((U32_S *)(x))->v)
|
||||
#define A16(x) (((U16_S *)(x))->v)
|
||||
|
||||
|
||||
//**************************************
|
||||
// Constants
|
||||
//**************************************
|
||||
#define MINMATCH 4
|
||||
|
||||
#define HASH_LOG COMPRESSIONLEVEL
|
||||
#define HASHTABLESIZE (1 << HASH_LOG)
|
||||
#define HASH_MASK (HASHTABLESIZE - 1)
|
||||
|
||||
#define SKIPSTRENGTH (NOTCOMPRESSIBLE_CONFIRMATION>2?NOTCOMPRESSIBLE_CONFIRMATION:2)
|
||||
#define STACKLIMIT 13
|
||||
#define HEAPMODE (HASH_LOG>STACKLIMIT) // Defines if memory is allocated into the stack (local variable), or into the heap (malloc()).
|
||||
#define COPYLENGTH 8
|
||||
#define LASTLITERALS 5
|
||||
#define MFLIMIT (COPYLENGTH+MINMATCH)
|
||||
#define MINLENGTH (MFLIMIT+1)
|
||||
|
||||
#define MAXD_LOG 16
|
||||
#define MAX_DISTANCE ((1 << MAXD_LOG) - 1)
|
||||
|
||||
#define ML_BITS 4
|
||||
#define ML_MASK ((1U<<ML_BITS)-1)
|
||||
#define RUN_BITS (8-ML_BITS)
|
||||
#define RUN_MASK ((1U<<RUN_BITS)-1)
|
||||
|
||||
|
||||
//**************************************
|
||||
// Architecture-specific macros
|
||||
//**************************************
|
||||
#if LZ4_ARCH64 // 64-bit
|
||||
# define STEPSIZE 8
|
||||
# define UARCH U64
|
||||
# define AARCH A64
|
||||
# define LZ4_COPYSTEP(s,d) A64(d) = A64(s); d+=8; s+=8;
|
||||
# define LZ4_COPYPACKET(s,d) LZ4_COPYSTEP(s,d)
|
||||
# define LZ4_SECURECOPY(s,d,e) if (d<e) LZ4_WILDCOPY(s,d,e)
|
||||
# define HTYPE U32
|
||||
# define INITBASE(base) const BYTE* const base = ip
|
||||
#else // 32-bit
|
||||
# define STEPSIZE 4
|
||||
# define UARCH U32
|
||||
# define AARCH A32
|
||||
# define LZ4_COPYSTEP(s,d) A32(d) = A32(s); d+=4; s+=4;
|
||||
# define LZ4_COPYPACKET(s,d) LZ4_COPYSTEP(s,d); LZ4_COPYSTEP(s,d);
|
||||
# define LZ4_SECURECOPY LZ4_WILDCOPY
|
||||
# define HTYPE const BYTE*
|
||||
# define INITBASE(base) const int base = 0
|
||||
#endif
|
||||
|
||||
#if (defined(LZ4_BIG_ENDIAN) && !defined(BIG_ENDIAN_NATIVE_BUT_INCOMPATIBLE))
|
||||
# define LZ4_READ_LITTLEENDIAN_16(d,s,p) { U16 v = A16(p); v = lz4_bswap16(v); d = (s) - v; }
|
||||
# define LZ4_WRITE_LITTLEENDIAN_16(p,i) { U16 v = (U16)(i); v = lz4_bswap16(v); A16(p) = v; p+=2; }
|
||||
#else // Little Endian
|
||||
# define LZ4_READ_LITTLEENDIAN_16(d,s,p) { d = (s) - A16(p); }
|
||||
# define LZ4_WRITE_LITTLEENDIAN_16(p,v) { A16(p) = v; p+=2; }
|
||||
#endif
|
||||
|
||||
|
||||
//**************************************
|
||||
// Local structures
|
||||
//**************************************
|
||||
struct refTables
|
||||
{
|
||||
HTYPE hashTable[HASHTABLESIZE];
|
||||
};
|
||||
|
||||
|
||||
//**************************************
|
||||
// Macros
|
||||
//**************************************
|
||||
#define LZ4_HASH_FUNCTION(i) (((i) * 2654435761U) >> ((MINMATCH*8)-HASH_LOG))
|
||||
#define LZ4_HASH_VALUE(p) LZ4_HASH_FUNCTION(A32(p))
|
||||
#define LZ4_WILDCOPY(s,d,e) do { LZ4_COPYPACKET(s,d) } while (d<e);
|
||||
#define LZ4_BLINDCOPY(s,d,l) { BYTE* e=(d)+l; LZ4_WILDCOPY(s,d,e); d=e; }
|
||||
|
||||
|
||||
//****************************
|
||||
// Private functions
|
||||
//****************************
|
||||
#if LZ4_ARCH64
|
||||
|
||||
inline static int LZ4_NbCommonBytes (register U64 val)
|
||||
{
|
||||
#if defined(LZ4_BIG_ENDIAN)
|
||||
#if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r = 0;
|
||||
_BitScanReverse64( &r, val );
|
||||
return (int)(r>>3);
|
||||
#elif defined(__GNUC__) && (GCC_VERSION >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_clzll(val) >> 3);
|
||||
#else
|
||||
int r;
|
||||
if (!(val>>32)) { r=4; } else { r=0; val>>=32; }
|
||||
if (!(val>>16)) { r+=2; val>>=8; } else { val>>=24; }
|
||||
r += (!val);
|
||||
return r;
|
||||
#endif
|
||||
#else
|
||||
#if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r = 0;
|
||||
_BitScanForward64( &r, val );
|
||||
return (int)(r>>3);
|
||||
#elif defined(__GNUC__) && (GCC_VERSION >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_ctzll(val) >> 3);
|
||||
#else
|
||||
static const int DeBruijnBytePos[64] = { 0, 0, 0, 0, 0, 1, 1, 2, 0, 3, 1, 3, 1, 4, 2, 7, 0, 2, 3, 6, 1, 5, 3, 5, 1, 3, 4, 4, 2, 5, 6, 7, 7, 0, 1, 2, 3, 3, 4, 6, 2, 6, 5, 5, 3, 4, 5, 6, 7, 1, 2, 4, 6, 4, 4, 5, 7, 2, 6, 5, 7, 6, 7, 7 };
|
||||
return DeBruijnBytePos[((U64)((val & -val) * 0x0218A392CDABBD3F)) >> 58];
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
inline static int LZ4_NbCommonBytes (register U32 val)
|
||||
{
|
||||
#if defined(LZ4_BIG_ENDIAN)
|
||||
#if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r = 0;
|
||||
_BitScanReverse( &r, val );
|
||||
return (int)(r>>3);
|
||||
#elif defined(__GNUC__) && (GCC_VERSION >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_clz(val) >> 3);
|
||||
#else
|
||||
int r;
|
||||
if (!(val>>16)) { r=2; val>>=8; } else { r=0; val>>=24; }
|
||||
r += (!val);
|
||||
return r;
|
||||
#endif
|
||||
#else
|
||||
#if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r = 0;
|
||||
_BitScanForward( &r, val );
|
||||
return (int)(r>>3);
|
||||
#elif defined(__GNUC__) && (GCC_VERSION >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_ctz(val) >> 3);
|
||||
#else
|
||||
static const int DeBruijnBytePos[32] = { 0, 0, 3, 0, 3, 1, 3, 0, 3, 2, 2, 1, 3, 2, 0, 1, 3, 3, 1, 2, 2, 2, 2, 0, 3, 1, 2, 0, 1, 0, 1, 1 };
|
||||
return DeBruijnBytePos[((U32)((val & -(S32)val) * 0x077CB531U)) >> 27];
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
//****************************
|
||||
// Public functions
|
||||
//****************************
|
||||
|
||||
int LZ4_compressBound(int isize)
|
||||
{
|
||||
return (isize + (isize/255) + 16);
|
||||
}
|
||||
|
||||
|
||||
|
||||
//******************************
|
||||
// Compression functions
|
||||
//******************************
|
||||
|
||||
int LZ4_compressCtx(void** ctx,
|
||||
const char* source,
|
||||
char* dest,
|
||||
int isize)
|
||||
{
|
||||
#if HEAPMODE
|
||||
struct refTables *srt = (struct refTables *) (*ctx);
|
||||
HTYPE* HashTable;
|
||||
#else
|
||||
HTYPE HashTable[HASHTABLESIZE] = {0};
|
||||
#endif
|
||||
|
||||
const BYTE* ip = (BYTE*) source;
|
||||
INITBASE(base);
|
||||
const BYTE* anchor = ip;
|
||||
const BYTE* const iend = ip + isize;
|
||||
const BYTE* const mflimit = iend - MFLIMIT;
|
||||
#define matchlimit (iend - LASTLITERALS)
|
||||
|
||||
BYTE* op = (BYTE*) dest;
|
||||
|
||||
int len, length;
|
||||
const int skipStrength = SKIPSTRENGTH;
|
||||
U32 forwardH;
|
||||
|
||||
|
||||
// Init
|
||||
if (isize<MINLENGTH) goto _last_literals;
|
||||
#if HEAPMODE
|
||||
if (*ctx == NULL)
|
||||
{
|
||||
srt = (struct refTables *) malloc ( sizeof(struct refTables) );
|
||||
*ctx = (void*) srt;
|
||||
}
|
||||
HashTable = (HTYPE*)(srt->hashTable);
|
||||
memset((void*)HashTable, 0, sizeof(srt->hashTable));
|
||||
#else
|
||||
(void) ctx;
|
||||
#endif
|
||||
|
||||
|
||||
// First Byte
|
||||
HashTable[LZ4_HASH_VALUE(ip)] = ip - base;
|
||||
ip++; forwardH = LZ4_HASH_VALUE(ip);
|
||||
|
||||
// Main Loop
|
||||
for ( ; ; )
|
||||
{
|
||||
int findMatchAttempts = (1U << skipStrength) + 3;
|
||||
const BYTE* forwardIp = ip;
|
||||
const BYTE* ref;
|
||||
BYTE* token;
|
||||
|
||||
// Find a match
|
||||
do {
|
||||
U32 h = forwardH;
|
||||
int step = findMatchAttempts++ >> skipStrength;
|
||||
ip = forwardIp;
|
||||
forwardIp = ip + step;
|
||||
|
||||
if unlikely(forwardIp > mflimit) { goto _last_literals; }
|
||||
|
||||
forwardH = LZ4_HASH_VALUE(forwardIp);
|
||||
ref = base + HashTable[h];
|
||||
HashTable[h] = ip - base;
|
||||
|
||||
} while ((ref < ip - MAX_DISTANCE) || (A32(ref) != A32(ip)));
|
||||
|
||||
// Catch up
|
||||
while ((ip>anchor) && (ref>(BYTE*)source) && unlikely(ip[-1]==ref[-1])) { ip--; ref--; }
|
||||
|
||||
// Encode Literal length
|
||||
length = ip - anchor;
|
||||
token = op++;
|
||||
if (length>=(int)RUN_MASK) { *token=(RUN_MASK<<ML_BITS); len = length-RUN_MASK; for(; len > 254 ; len-=255) *op++ = 255; *op++ = (BYTE)len; }
|
||||
else *token = (length<<ML_BITS);
|
||||
|
||||
// Copy Literals
|
||||
LZ4_BLINDCOPY(anchor, op, length);
|
||||
|
||||
_next_match:
|
||||
// Encode Offset
|
||||
LZ4_WRITE_LITTLEENDIAN_16(op,ip-ref);
|
||||
|
||||
// Start Counting
|
||||
ip+=MINMATCH; ref+=MINMATCH; // MinMatch verified
|
||||
anchor = ip;
|
||||
while likely(ip<matchlimit-(STEPSIZE-1))
|
||||
{
|
||||
UARCH diff = AARCH(ref) ^ AARCH(ip);
|
||||
if (!diff) { ip+=STEPSIZE; ref+=STEPSIZE; continue; }
|
||||
ip += LZ4_NbCommonBytes(diff);
|
||||
goto _endCount;
|
||||
}
|
||||
if (LZ4_ARCH64) if ((ip<(matchlimit-3)) && (A32(ref) == A32(ip))) { ip+=4; ref+=4; }
|
||||
if ((ip<(matchlimit-1)) && (A16(ref) == A16(ip))) { ip+=2; ref+=2; }
|
||||
if ((ip<matchlimit) && (*ref == *ip)) ip++;
|
||||
_endCount:
|
||||
|
||||
// Encode MatchLength
|
||||
len = (ip - anchor);
|
||||
if (len>=(int)ML_MASK) { *token+=ML_MASK; len-=ML_MASK; for(; len > 509 ; len-=510) { *op++ = 255; *op++ = 255; } if (len > 254) { len-=255; *op++ = 255; } *op++ = (BYTE)len; }
|
||||
else *token += len;
|
||||
|
||||
// Test end of chunk
|
||||
if (ip > mflimit) { anchor = ip; break; }
|
||||
|
||||
// Fill table
|
||||
HashTable[LZ4_HASH_VALUE(ip-2)] = ip - 2 - base;
|
||||
|
||||
// Test next position
|
||||
ref = base + HashTable[LZ4_HASH_VALUE(ip)];
|
||||
HashTable[LZ4_HASH_VALUE(ip)] = ip - base;
|
||||
if ((ref > ip - (MAX_DISTANCE + 1)) && (A32(ref) == A32(ip))) { token = op++; *token=0; goto _next_match; }
|
||||
|
||||
// Prepare next loop
|
||||
anchor = ip++;
|
||||
forwardH = LZ4_HASH_VALUE(ip);
|
||||
}
|
||||
|
||||
_last_literals:
|
||||
// Encode Last Literals
|
||||
{
|
||||
int lastRun = iend - anchor;
|
||||
if ((LZ4_COMPRESSMIN>0) && (((op - (BYTE*)dest) + lastRun + 1 + ((lastRun-15)/255)) > isize - LZ4_COMPRESSMIN)) return 0;
|
||||
if (lastRun>=(int)RUN_MASK) { *op++=(RUN_MASK<<ML_BITS); lastRun-=RUN_MASK; for(; lastRun > 254 ; lastRun-=255) *op++ = 255; *op++ = (BYTE) lastRun; }
|
||||
else *op++ = (lastRun<<ML_BITS);
|
||||
memcpy(op, anchor, iend - anchor);
|
||||
op += iend-anchor;
|
||||
}
|
||||
|
||||
// End
|
||||
return (int) (((char*)op)-dest);
|
||||
}
|
||||
|
||||
|
||||
|
||||
// Note : this function is valid only if isize < LZ4_64KLIMIT
|
||||
#define LZ4_64KLIMIT ((1<<16) + (MFLIMIT-1))
|
||||
#define HASHLOG64K (HASH_LOG+1)
|
||||
#define HASH64KTABLESIZE (1U<<HASHLOG64K)
|
||||
#define LZ4_HASH64K_FUNCTION(i) (((i) * 2654435761U) >> ((MINMATCH*8)-HASHLOG64K))
|
||||
#define LZ4_HASH64K_VALUE(p) LZ4_HASH64K_FUNCTION(A32(p))
|
||||
int LZ4_compress64kCtx(void** ctx,
|
||||
const char* source,
|
||||
char* dest,
|
||||
int isize)
|
||||
{
|
||||
#if HEAPMODE
|
||||
struct refTables *srt = (struct refTables *) (*ctx);
|
||||
U16* HashTable;
|
||||
#else
|
||||
U16 HashTable[HASH64KTABLESIZE] = {0};
|
||||
#endif
|
||||
|
||||
const BYTE* ip = (BYTE*) source;
|
||||
const BYTE* anchor = ip;
|
||||
const BYTE* const base = ip;
|
||||
const BYTE* const iend = ip + isize;
|
||||
const BYTE* const mflimit = iend - MFLIMIT;
|
||||
#define matchlimit (iend - LASTLITERALS)
|
||||
|
||||
BYTE* op = (BYTE*) dest;
|
||||
|
||||
int len, length;
|
||||
const int skipStrength = SKIPSTRENGTH;
|
||||
U32 forwardH;
|
||||
|
||||
|
||||
// Init
|
||||
if (isize<MINLENGTH) goto _last_literals;
|
||||
#if HEAPMODE
|
||||
if (*ctx == NULL)
|
||||
{
|
||||
srt = (struct refTables *) malloc ( sizeof(struct refTables) );
|
||||
*ctx = (void*) srt;
|
||||
}
|
||||
HashTable = (U16*)(srt->hashTable);
|
||||
memset((void*)HashTable, 0, sizeof(srt->hashTable));
|
||||
#else
|
||||
(void) ctx;
|
||||
#endif
|
||||
|
||||
|
||||
// First Byte
|
||||
ip++; forwardH = LZ4_HASH64K_VALUE(ip);
|
||||
|
||||
// Main Loop
|
||||
for ( ; ; )
|
||||
{
|
||||
int findMatchAttempts = (1U << skipStrength) + 3;
|
||||
const BYTE* forwardIp = ip;
|
||||
const BYTE* ref;
|
||||
BYTE* token;
|
||||
|
||||
// Find a match
|
||||
do {
|
||||
U32 h = forwardH;
|
||||
int step = findMatchAttempts++ >> skipStrength;
|
||||
ip = forwardIp;
|
||||
forwardIp = ip + step;
|
||||
|
||||
if (forwardIp > mflimit) { goto _last_literals; }
|
||||
|
||||
forwardH = LZ4_HASH64K_VALUE(forwardIp);
|
||||
ref = base + HashTable[h];
|
||||
HashTable[h] = ip - base;
|
||||
|
||||
} while (A32(ref) != A32(ip));
|
||||
|
||||
// Catch up
|
||||
while ((ip>anchor) && (ref>(BYTE*)source) && (ip[-1]==ref[-1])) { ip--; ref--; }
|
||||
|
||||
// Encode Literal length
|
||||
length = ip - anchor;
|
||||
token = op++;
|
||||
if (length>=(int)RUN_MASK) { *token=(RUN_MASK<<ML_BITS); len = length-RUN_MASK; for(; len > 254 ; len-=255) *op++ = 255; *op++ = (BYTE)len; }
|
||||
else *token = (length<<ML_BITS);
|
||||
|
||||
// Copy Literals
|
||||
LZ4_BLINDCOPY(anchor, op, length);
|
||||
|
||||
_next_match:
|
||||
// Encode Offset
|
||||
LZ4_WRITE_LITTLEENDIAN_16(op,ip-ref);
|
||||
|
||||
// Start Counting
|
||||
ip+=MINMATCH; ref+=MINMATCH; // MinMatch verified
|
||||
anchor = ip;
|
||||
while (ip<matchlimit-(STEPSIZE-1))
|
||||
{
|
||||
UARCH diff = AARCH(ref) ^ AARCH(ip);
|
||||
if (!diff) { ip+=STEPSIZE; ref+=STEPSIZE; continue; }
|
||||
ip += LZ4_NbCommonBytes(diff);
|
||||
goto _endCount;
|
||||
}
|
||||
if (LZ4_ARCH64) if ((ip<(matchlimit-3)) && (A32(ref) == A32(ip))) { ip+=4; ref+=4; }
|
||||
if ((ip<(matchlimit-1)) && (A16(ref) == A16(ip))) { ip+=2; ref+=2; }
|
||||
if ((ip<matchlimit) && (*ref == *ip)) ip++;
|
||||
_endCount:
|
||||
|
||||
// Encode MatchLength
|
||||
len = (ip - anchor);
|
||||
if (len>=(int)ML_MASK) { *token+=ML_MASK; len-=ML_MASK; for(; len > 509 ; len-=510) { *op++ = 255; *op++ = 255; } if (len > 254) { len-=255; *op++ = 255; } *op++ = (BYTE)len; }
|
||||
else *token += len;
|
||||
|
||||
// Test end of chunk
|
||||
if (ip > mflimit) { anchor = ip; break; }
|
||||
|
||||
// Fill table
|
||||
HashTable[LZ4_HASH64K_VALUE(ip-2)] = ip - 2 - base;
|
||||
|
||||
// Test next position
|
||||
ref = base + HashTable[LZ4_HASH64K_VALUE(ip)];
|
||||
HashTable[LZ4_HASH64K_VALUE(ip)] = ip - base;
|
||||
if (A32(ref) == A32(ip)) { token = op++; *token=0; goto _next_match; }
|
||||
|
||||
// Prepare next loop
|
||||
anchor = ip++;
|
||||
forwardH = LZ4_HASH64K_VALUE(ip);
|
||||
}
|
||||
|
||||
_last_literals:
|
||||
// Encode Last Literals
|
||||
{
|
||||
int lastRun = iend - anchor;
|
||||
if ((LZ4_COMPRESSMIN>0) && (((op - (BYTE*)dest) + lastRun + 1 + ((lastRun-15)/255)) > isize - LZ4_COMPRESSMIN)) return 0;
|
||||
if (lastRun>=(int)RUN_MASK) { *op++=(RUN_MASK<<ML_BITS); lastRun-=RUN_MASK; for(; lastRun > 254 ; lastRun-=255) *op++ = 255; *op++ = (BYTE) lastRun; }
|
||||
else *op++ = (lastRun<<ML_BITS);
|
||||
memcpy(op, anchor, iend - anchor);
|
||||
op += iend-anchor;
|
||||
}
|
||||
|
||||
// End
|
||||
return (int) (((char*)op)-dest);
|
||||
}
|
||||
|
||||
|
||||
|
||||
int LZ4_compress(const char* source,
|
||||
char* dest,
|
||||
int isize)
|
||||
{
|
||||
#if HEAPMODE
|
||||
void* ctx = malloc(sizeof(struct refTables));
|
||||
int result;
|
||||
if (isize < LZ4_64KLIMIT)
|
||||
result = LZ4_compress64kCtx(&ctx, source, dest, isize);
|
||||
else result = LZ4_compressCtx(&ctx, source, dest, isize);
|
||||
free(ctx);
|
||||
return result;
|
||||
#else
|
||||
if (isize < (int)LZ4_64KLIMIT) return LZ4_compress64kCtx(NULL, source, dest, isize);
|
||||
return LZ4_compressCtx(NULL, source, dest, isize);
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
//****************************
|
||||
// Decompression functions
|
||||
//****************************
|
||||
|
||||
// Note : The decoding functions LZ4_uncompress() and LZ4_uncompress_unknownOutputSize()
|
||||
// are safe against "buffer overflow" attack type.
|
||||
// They will never write nor read outside of the provided output buffers.
|
||||
// LZ4_uncompress_unknownOutputSize() also insures that it will never read outside of the input buffer.
|
||||
// A corrupted input will produce an error result, a negative int, indicating the position of the error within input stream.
|
||||
|
||||
int LZ4_uncompress(const char* source,
|
||||
char* dest,
|
||||
int osize)
|
||||
{
|
||||
// Local Variables
|
||||
const BYTE* restrict ip = (const BYTE*) source;
|
||||
const BYTE* restrict ref;
|
||||
|
||||
BYTE* restrict op = (BYTE*) dest;
|
||||
BYTE* const oend = op + osize;
|
||||
BYTE* cpy;
|
||||
|
||||
BYTE token;
|
||||
|
||||
int len, length;
|
||||
size_t dec[] ={0, 3, 2, 3, 0, 0, 0, 0};
|
||||
|
||||
|
||||
// Main Loop
|
||||
while (1)
|
||||
{
|
||||
// get runlength
|
||||
token = *ip++;
|
||||
if ((length=(token>>ML_BITS)) == RUN_MASK) { for (;(len=*ip++)==255;length+=255){} length += len; }
|
||||
|
||||
// copy literals
|
||||
cpy = op+length;
|
||||
if unlikely(cpy>oend-COPYLENGTH)
|
||||
{
|
||||
if (cpy > oend) goto _output_error; // Error : request to write beyond destination buffer
|
||||
memcpy(op, ip, length);
|
||||
ip += length;
|
||||
break; // Necessarily EOF
|
||||
}
|
||||
LZ4_WILDCOPY(ip, op, cpy); ip -= (op-cpy); op = cpy;
|
||||
|
||||
// get offset
|
||||
LZ4_READ_LITTLEENDIAN_16(ref,cpy,ip); ip+=2;
|
||||
if (ref < (BYTE* const)dest) goto _output_error; // Error : offset create reference outside destination buffer
|
||||
|
||||
// get matchlength
|
||||
if ((length=(token&ML_MASK)) == ML_MASK) { for (;*ip==255;length+=255) {ip++;} length += *ip++; }
|
||||
|
||||
// copy repeated sequence
|
||||
if unlikely(op-ref<STEPSIZE)
|
||||
{
|
||||
#if LZ4_ARCH64
|
||||
size_t dec2table[]={0, 0, 0, -1, 0, 1, 2, 3};
|
||||
size_t dec2 = dec2table[op-ref];
|
||||
#else
|
||||
const int dec2 = 0;
|
||||
#endif
|
||||
*op++ = *ref++;
|
||||
*op++ = *ref++;
|
||||
*op++ = *ref++;
|
||||
*op++ = *ref++;
|
||||
ref -= dec[op-ref];
|
||||
A32(op)=A32(ref); op += STEPSIZE-4;
|
||||
ref -= dec2;
|
||||
} else { LZ4_COPYSTEP(ref,op); }
|
||||
cpy = op + length - (STEPSIZE-4);
|
||||
if (cpy>oend-COPYLENGTH)
|
||||
{
|
||||
if (cpy > oend) goto _output_error; // Error : request to write beyond destination buffer
|
||||
LZ4_SECURECOPY(ref, op, (oend-COPYLENGTH));
|
||||
while(op<cpy) *op++=*ref++;
|
||||
op=cpy;
|
||||
if (op == oend) break; // Check EOF (should never happen, since last 5 bytes are supposed to be literals)
|
||||
continue;
|
||||
}
|
||||
LZ4_SECURECOPY(ref, op, cpy);
|
||||
op=cpy; // correction
|
||||
}
|
||||
|
||||
// end of decoding
|
||||
return (int) (((char*)ip)-source);
|
||||
|
||||
// write overflow error detected
|
||||
_output_error:
|
||||
return (int) (-(((char*)ip)-source));
|
||||
}
|
||||
|
||||
|
||||
int LZ4_uncompress_unknownOutputSize(
|
||||
const char* source,
|
||||
char* dest,
|
||||
int isize,
|
||||
int maxOutputSize)
|
||||
{
|
||||
// Local Variables
|
||||
const BYTE* restrict ip = (const BYTE*) source;
|
||||
const BYTE* const iend = ip + isize;
|
||||
const BYTE* restrict ref;
|
||||
|
||||
BYTE* restrict op = (BYTE*) dest;
|
||||
BYTE* const oend = op + maxOutputSize;
|
||||
BYTE* cpy;
|
||||
|
||||
size_t dec[] ={0, 3, 2, 3, 0, 0, 0, 0};
|
||||
|
||||
|
||||
// Main Loop
|
||||
while (ip<iend)
|
||||
{
|
||||
BYTE token;
|
||||
int length;
|
||||
|
||||
// get runlength
|
||||
token = *ip++;
|
||||
if ((length=(token>>ML_BITS)) == RUN_MASK) { int s=255; while ((ip<iend) && (s==255)) { s=*ip++; length += s; } }
|
||||
|
||||
// copy literals
|
||||
cpy = op+length;
|
||||
if ((cpy>oend-COPYLENGTH) || (ip+length>iend-COPYLENGTH))
|
||||
{
|
||||
if (cpy > oend) goto _output_error; // Error : request to write beyond destination buffer
|
||||
if (ip+length > iend) goto _output_error; // Error : request to read beyond source buffer
|
||||
memcpy(op, ip, length);
|
||||
op += length;
|
||||
ip += length;
|
||||
if (ip<iend) goto _output_error; // Error : LZ4 format violation
|
||||
break; // Necessarily EOF, due to parsing restrictions
|
||||
}
|
||||
LZ4_WILDCOPY(ip, op, cpy); ip -= (op-cpy); op = cpy;
|
||||
|
||||
// get offset
|
||||
LZ4_READ_LITTLEENDIAN_16(ref,cpy,ip); ip+=2;
|
||||
if (ref < (BYTE* const)dest) goto _output_error; // Error : offset creates reference outside of destination buffer
|
||||
|
||||
// get matchlength
|
||||
if ((length=(token&ML_MASK)) == ML_MASK) { while (ip<iend) { int s = *ip++; length +=s; if (s==255) continue; break; } }
|
||||
|
||||
// copy repeated sequence
|
||||
if unlikely(op-ref<STEPSIZE)
|
||||
{
|
||||
#if LZ4_ARCH64
|
||||
size_t dec2table[]={0, 0, 0, -1, 0, 1, 2, 3};
|
||||
size_t dec2 = dec2table[op-ref];
|
||||
#else
|
||||
const int dec2 = 0;
|
||||
#endif
|
||||
*op++ = *ref++;
|
||||
*op++ = *ref++;
|
||||
*op++ = *ref++;
|
||||
*op++ = *ref++;
|
||||
ref -= dec[op-ref];
|
||||
A32(op)=A32(ref); op += STEPSIZE-4;
|
||||
ref -= dec2;
|
||||
} else { LZ4_COPYSTEP(ref,op); }
|
||||
cpy = op + length - (STEPSIZE-4);
|
||||
if (cpy>oend-COPYLENGTH)
|
||||
{
|
||||
if (cpy > oend) goto _output_error; // Error : request to write outside of destination buffer
|
||||
LZ4_SECURECOPY(ref, op, (oend-COPYLENGTH));
|
||||
while(op<cpy) *op++=*ref++;
|
||||
op=cpy;
|
||||
if (op == oend) break; // Check EOF (should never happen, since last 5 bytes are supposed to be literals)
|
||||
continue;
|
||||
}
|
||||
LZ4_SECURECOPY(ref, op, cpy);
|
||||
op=cpy; // correction
|
||||
}
|
||||
|
||||
// end of decoding
|
||||
return (int) (((char*)op)-dest);
|
||||
|
||||
// write overflow error detected
|
||||
_output_error:
|
||||
return (int) (-(((char*)ip)-source));
|
||||
}
|
||||
|
|
@ -0,0 +1,120 @@
|
|||
/*
|
||||
LZ4 - Fast LZ compression algorithm
|
||||
Header File
|
||||
Copyright (C) 2011-2012, Yann Collet.
|
||||
BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
|
||||
|
||||
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.
|
||||
|
||||
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.
|
||||
|
||||
You can contact the author at :
|
||||
- LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
|
||||
- LZ4 source repository : http://code.google.com/p/lz4/
|
||||
*/
|
||||
#pragma once
|
||||
|
||||
#if defined (__cplusplus)
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
|
||||
//****************************
|
||||
// Simple Functions
|
||||
//****************************
|
||||
|
||||
int LZ4_compress (const char* source, char* dest, int isize);
|
||||
int LZ4_uncompress (const char* source, char* dest, int osize);
|
||||
|
||||
/*
|
||||
LZ4_compress() :
|
||||
isize : is the input size. Max supported value is ~1.9GB
|
||||
return : the number of bytes written in buffer dest
|
||||
or 0 if the compression fails (if LZ4_COMPRESSMIN is set)
|
||||
note : destination buffer must be already allocated.
|
||||
destination buffer must be sized to handle worst cases situations (input data not compressible)
|
||||
worst case size evaluation is provided by function LZ4_compressBound()
|
||||
|
||||
LZ4_uncompress() :
|
||||
osize : is the output size, therefore the original size
|
||||
return : the number of bytes read in the source buffer
|
||||
If the source stream is malformed, the function will stop decoding and return a negative result, indicating the byte position of the faulty instruction
|
||||
This function never writes beyond dest + osize, and is therefore protected against malicious data packets
|
||||
note : destination buffer must be already allocated
|
||||
*/
|
||||
|
||||
|
||||
//****************************
|
||||
// Advanced Functions
|
||||
//****************************
|
||||
|
||||
int LZ4_compressBound(int isize);
|
||||
|
||||
/*
|
||||
LZ4_compressBound() :
|
||||
Provides the maximum size that LZ4 may output in a "worst case" scenario (input data not compressible)
|
||||
primarily useful for memory allocation of output buffer.
|
||||
|
||||
isize : is the input size. Max supported value is ~1.9GB
|
||||
return : maximum output size in a "worst case" scenario
|
||||
note : this function is limited by "int" range (2^31-1)
|
||||
*/
|
||||
|
||||
|
||||
int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize);
|
||||
|
||||
/*
|
||||
LZ4_uncompress_unknownOutputSize() :
|
||||
isize : is the input size, therefore the compressed size
|
||||
maxOutputSize : is the size of the destination buffer (which must be already allocated)
|
||||
return : the number of bytes decoded in the destination buffer (necessarily <= maxOutputSize)
|
||||
If the source stream is malformed, the function will stop decoding and return a negative result, indicating the byte position of the faulty instruction
|
||||
This function never writes beyond dest + maxOutputSize, and is therefore protected against malicious data packets
|
||||
note : Destination buffer must be already allocated.
|
||||
This version is slightly slower than LZ4_uncompress()
|
||||
*/
|
||||
|
||||
|
||||
int LZ4_compressCtx(void** ctx, const char* source, char* dest, int isize);
|
||||
int LZ4_compress64kCtx(void** ctx, const char* source, char* dest, int isize);
|
||||
|
||||
/*
|
||||
LZ4_compressCtx() :
|
||||
This function explicitly handles the CTX memory structure.
|
||||
It avoids allocating/deallocating memory between each call, improving performance when malloc is heavily invoked.
|
||||
This function is only useful when memory is allocated into the heap (HASH_LOG value beyond STACK_LIMIT)
|
||||
Performance difference will be noticeable only when repetitively calling the compression function over many small segments.
|
||||
Note : by default, memory is allocated into the stack, therefore "malloc" is not invoked.
|
||||
LZ4_compress64kCtx() :
|
||||
Same as LZ4_compressCtx(), but specific to small inputs (<64KB).
|
||||
isize *Must* be <64KB, otherwise the output will be corrupted.
|
||||
|
||||
On first call : provide a *ctx=NULL; It will be automatically allocated.
|
||||
On next calls : reuse the same ctx pointer.
|
||||
Use different pointers for different threads when doing multi-threading.
|
||||
|
||||
*/
|
||||
|
||||
|
||||
#if defined (__cplusplus)
|
||||
}
|
||||
#endif
|
|
@ -0,0 +1,663 @@
|
|||
/*
|
||||
LZ4 HC - High Compression Mode of LZ4
|
||||
Copyright (C) 2011-2012, Yann Collet.
|
||||
BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
|
||||
|
||||
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.
|
||||
|
||||
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.
|
||||
|
||||
You can contact the author at :
|
||||
- LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
|
||||
- LZ4 source repository : http://code.google.com/p/lz4/
|
||||
*/
|
||||
|
||||
|
||||
//**************************************
|
||||
// CPU Feature Detection
|
||||
//**************************************
|
||||
// 32 or 64 bits ?
|
||||
#if (defined(__x86_64__) || defined(__x86_64) || defined(__amd64__) || defined(__amd64) || defined(__ppc64__) || defined(_WIN64) || defined(__LP64__) || defined(_LP64) ) // Detects 64 bits mode
|
||||
#define LZ4_ARCH64 1
|
||||
#else
|
||||
#define LZ4_ARCH64 0
|
||||
#endif
|
||||
|
||||
// Little Endian or Big Endian ?
|
||||
#if (defined(__BIG_ENDIAN__) || defined(__BIG_ENDIAN) || defined(_BIG_ENDIAN) || defined(_ARCH_PPC) || defined(__PPC__) || defined(__PPC) || defined(PPC) || defined(__powerpc__) || defined(__powerpc) || defined(powerpc) || ((defined(__BYTE_ORDER__)&&(__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))) )
|
||||
#define LZ4_BIG_ENDIAN 1
|
||||
#else
|
||||
// Little Endian assumed. PDP Endian and other very rare endian format are unsupported.
|
||||
#endif
|
||||
|
||||
// Unaligned memory access is automatically enabled for "common" CPU, such as x86.
|
||||
// For others CPU, the compiler will be more cautious, and insert extra code to ensure aligned access is respected
|
||||
// If you know your target CPU supports unaligned memory access, you may want to force this option manually to improve performance
|
||||
#if defined(__ARM_FEATURE_UNALIGNED)
|
||||
#define LZ4_FORCE_UNALIGNED_ACCESS 1
|
||||
#endif
|
||||
|
||||
|
||||
//**************************************
|
||||
// Compiler Options
|
||||
//**************************************
|
||||
#if __STDC_VERSION__ >= 199901L // C99
|
||||
/* "restrict" is a known keyword */
|
||||
#else
|
||||
#define restrict // Disable restrict
|
||||
#endif
|
||||
|
||||
#ifdef _MSC_VER
|
||||
#define inline __forceinline // Visual is not C99, but supports some kind of inline
|
||||
#endif
|
||||
|
||||
#ifdef _MSC_VER // Visual Studio
|
||||
#define bswap16(x) _byteswap_ushort(x)
|
||||
#else
|
||||
#define bswap16(x) ((unsigned short int) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)))
|
||||
#endif
|
||||
|
||||
|
||||
//**************************************
|
||||
// Includes
|
||||
//**************************************
|
||||
#include <stdlib.h> // calloc, free
|
||||
#include <string.h> // memset, memcpy
|
||||
#include "lz4hc.h"
|
||||
|
||||
#define ALLOCATOR(s) calloc(1,s)
|
||||
#define FREEMEM free
|
||||
#define MEM_INIT memset
|
||||
|
||||
|
||||
//**************************************
|
||||
// Basic Types
|
||||
//**************************************
|
||||
#if defined(_MSC_VER) // Visual Studio does not support 'stdint' natively
|
||||
#define BYTE unsigned __int8
|
||||
#define U16 unsigned __int16
|
||||
#define U32 unsigned __int32
|
||||
#define S32 __int32
|
||||
#define U64 unsigned __int64
|
||||
#else
|
||||
#include <stdint.h>
|
||||
#define BYTE uint8_t
|
||||
#define U16 uint16_t
|
||||
#define U32 uint32_t
|
||||
#define S32 int32_t
|
||||
#define U64 uint64_t
|
||||
#endif
|
||||
|
||||
#ifndef LZ4_FORCE_UNALIGNED_ACCESS
|
||||
#pragma pack(push, 1)
|
||||
#endif
|
||||
|
||||
typedef struct _U16_S { U16 v; } U16_S;
|
||||
typedef struct _U32_S { U32 v; } U32_S;
|
||||
typedef struct _U64_S { U64 v; } U64_S;
|
||||
|
||||
#ifndef LZ4_FORCE_UNALIGNED_ACCESS
|
||||
#pragma pack(pop)
|
||||
#endif
|
||||
|
||||
#define A64(x) (((U64_S *)(x))->v)
|
||||
#define A32(x) (((U32_S *)(x))->v)
|
||||
#define A16(x) (((U16_S *)(x))->v)
|
||||
|
||||
|
||||
//**************************************
|
||||
// Constants
|
||||
//**************************************
|
||||
#define MINMATCH 4
|
||||
|
||||
#define DICTIONARY_LOGSIZE 16
|
||||
#define MAXD (1<<DICTIONARY_LOGSIZE)
|
||||
#define MAXD_MASK ((U32)(MAXD - 1))
|
||||
#define MAX_DISTANCE (MAXD - 1)
|
||||
|
||||
#define HASH_LOG (DICTIONARY_LOGSIZE-1)
|
||||
#define HASHTABLESIZE (1 << HASH_LOG)
|
||||
#define HASH_MASK (HASHTABLESIZE - 1)
|
||||
|
||||
#define MAX_NB_ATTEMPTS 256
|
||||
|
||||
#define ML_BITS 4
|
||||
#define ML_MASK (size_t)((1U<<ML_BITS)-1)
|
||||
#define RUN_BITS (8-ML_BITS)
|
||||
#define RUN_MASK ((1U<<RUN_BITS)-1)
|
||||
|
||||
#define COPYLENGTH 8
|
||||
#define LASTLITERALS 5
|
||||
#define MFLIMIT (COPYLENGTH+MINMATCH)
|
||||
#define MINLENGTH (MFLIMIT+1)
|
||||
#define OPTIMAL_ML (int)((ML_MASK-1)+MINMATCH)
|
||||
|
||||
|
||||
//**************************************
|
||||
// Architecture-specific macros
|
||||
//**************************************
|
||||
#if LZ4_ARCH64 // 64-bit
|
||||
#define STEPSIZE 8
|
||||
#define LZ4_COPYSTEP(s,d) A64(d) = A64(s); d+=8; s+=8;
|
||||
#define LZ4_COPYPACKET(s,d) LZ4_COPYSTEP(s,d)
|
||||
#define UARCH U64
|
||||
#define AARCH A64
|
||||
#define HTYPE U32
|
||||
#define INITBASE(b,s) const BYTE* const b = s
|
||||
#else // 32-bit
|
||||
#define STEPSIZE 4
|
||||
#define LZ4_COPYSTEP(s,d) A32(d) = A32(s); d+=4; s+=4;
|
||||
#define LZ4_COPYPACKET(s,d) LZ4_COPYSTEP(s,d); LZ4_COPYSTEP(s,d);
|
||||
#define UARCH U32
|
||||
#define AARCH A32
|
||||
#define HTYPE const BYTE*
|
||||
#define INITBASE(b,s) const int b = 0
|
||||
#endif
|
||||
|
||||
#if defined(LZ4_BIG_ENDIAN)
|
||||
#define LZ4_READ_LITTLEENDIAN_16(d,s,p) { U16 v = A16(p); v = bswap16(v); d = (s) - v; }
|
||||
#define LZ4_WRITE_LITTLEENDIAN_16(p,i) { U16 v = (U16)(i); v = bswap16(v); A16(p) = v; p+=2; }
|
||||
#else // Little Endian
|
||||
#define LZ4_READ_LITTLEENDIAN_16(d,s,p) { d = (s) - A16(p); }
|
||||
#define LZ4_WRITE_LITTLEENDIAN_16(p,v) { A16(p) = v; p+=2; }
|
||||
#endif
|
||||
|
||||
|
||||
//************************************************************
|
||||
// Local Types
|
||||
//************************************************************
|
||||
typedef struct
|
||||
{
|
||||
const BYTE* base;
|
||||
HTYPE hashTable[HASHTABLESIZE];
|
||||
U16 chainTable[MAXD];
|
||||
const BYTE* nextToUpdate;
|
||||
} LZ4HC_Data_Structure;
|
||||
|
||||
|
||||
//**************************************
|
||||
// Macros
|
||||
//**************************************
|
||||
#define LZ4_WILDCOPY(s,d,e) do { LZ4_COPYPACKET(s,d) } while (d<e);
|
||||
#define LZ4_BLINDCOPY(s,d,l) { BYTE* e=d+l; LZ4_WILDCOPY(s,d,e); d=e; }
|
||||
#define HASH_FUNCTION(i) (((i) * 2654435761U) >> ((MINMATCH*8)-HASH_LOG))
|
||||
#define HASH_VALUE(p) HASH_FUNCTION(*(U32*)(p))
|
||||
#define HASH_POINTER(p) (HashTable[HASH_VALUE(p)] + base)
|
||||
#define DELTANEXT(p) chainTable[(size_t)(p) & MAXD_MASK]
|
||||
#define GETNEXT(p) ((p) - (size_t)DELTANEXT(p))
|
||||
#define ADD_HASH(p) { size_t delta = (p) - HASH_POINTER(p); if (delta>MAX_DISTANCE) delta = MAX_DISTANCE; DELTANEXT(p) = (U16)delta; HashTable[HASH_VALUE(p)] = (p) - base; }
|
||||
|
||||
|
||||
//**************************************
|
||||
// Private functions
|
||||
//**************************************
|
||||
#if LZ4_ARCH64
|
||||
|
||||
inline static int LZ4_NbCommonBytes (register U64 val)
|
||||
{
|
||||
#if defined(LZ4_BIG_ENDIAN)
|
||||
#if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r = 0;
|
||||
_BitScanReverse64( &r, val );
|
||||
return (int)(r>>3);
|
||||
#elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_clzll(val) >> 3);
|
||||
#else
|
||||
int r;
|
||||
if (!(val>>32)) { r=4; } else { r=0; val>>=32; }
|
||||
if (!(val>>16)) { r+=2; val>>=8; } else { val>>=24; }
|
||||
r += (!val);
|
||||
return r;
|
||||
#endif
|
||||
#else
|
||||
#if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r = 0;
|
||||
_BitScanForward64( &r, val );
|
||||
return (int)(r>>3);
|
||||
#elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_ctzll(val) >> 3);
|
||||
#else
|
||||
static const int DeBruijnBytePos[64] = { 0, 0, 0, 0, 0, 1, 1, 2, 0, 3, 1, 3, 1, 4, 2, 7, 0, 2, 3, 6, 1, 5, 3, 5, 1, 3, 4, 4, 2, 5, 6, 7, 7, 0, 1, 2, 3, 3, 4, 6, 2, 6, 5, 5, 3, 4, 5, 6, 7, 1, 2, 4, 6, 4, 4, 5, 7, 2, 6, 5, 7, 6, 7, 7 };
|
||||
return DeBruijnBytePos[((U64)((val & -val) * 0x0218A392CDABBD3F)) >> 58];
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
inline static int LZ4_NbCommonBytes (register U32 val)
|
||||
{
|
||||
#if defined(LZ4_BIG_ENDIAN)
|
||||
#if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r = 0;
|
||||
_BitScanReverse( &r, val );
|
||||
return (int)(r>>3);
|
||||
#elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_clz(val) >> 3);
|
||||
#else
|
||||
int r;
|
||||
if (!(val>>16)) { r=2; val>>=8; } else { r=0; val>>=24; }
|
||||
r += (!val);
|
||||
return r;
|
||||
#endif
|
||||
#else
|
||||
#if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r = 0;
|
||||
_BitScanForward( &r, val );
|
||||
return (int)(r>>3);
|
||||
#elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_ctz(val) >> 3);
|
||||
#else
|
||||
static const int DeBruijnBytePos[32] = { 0, 0, 3, 0, 3, 1, 3, 0, 3, 2, 2, 1, 3, 2, 0, 1, 3, 3, 1, 2, 2, 2, 2, 0, 3, 1, 2, 0, 1, 0, 1, 1 };
|
||||
return DeBruijnBytePos[((U32)((val & -(S32)val) * 0x077CB531U)) >> 27];
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
inline static int LZ4HC_Init (LZ4HC_Data_Structure* hc4, const BYTE* base)
|
||||
{
|
||||
MEM_INIT((void*)hc4->hashTable, 0, sizeof(hc4->hashTable));
|
||||
MEM_INIT(hc4->chainTable, 0xFF, sizeof(hc4->chainTable));
|
||||
hc4->nextToUpdate = base + LZ4_ARCH64;
|
||||
hc4->base = base;
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
inline static void* LZ4HC_Create (const BYTE* base)
|
||||
{
|
||||
void* hc4 = ALLOCATOR(sizeof(LZ4HC_Data_Structure));
|
||||
|
||||
LZ4HC_Init (hc4, base);
|
||||
return hc4;
|
||||
}
|
||||
|
||||
|
||||
inline static int LZ4HC_Free (void** LZ4HC_Data)
|
||||
{
|
||||
FREEMEM(*LZ4HC_Data);
|
||||
*LZ4HC_Data = NULL;
|
||||
return (1);
|
||||
}
|
||||
|
||||
|
||||
inline static void LZ4HC_Insert (LZ4HC_Data_Structure* hc4, const BYTE* ip)
|
||||
{
|
||||
U16* chainTable = hc4->chainTable;
|
||||
HTYPE* HashTable = hc4->hashTable;
|
||||
INITBASE(base,hc4->base);
|
||||
|
||||
while(hc4->nextToUpdate < ip)
|
||||
{
|
||||
ADD_HASH(hc4->nextToUpdate);
|
||||
hc4->nextToUpdate++;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
inline static int LZ4HC_InsertAndFindBestMatch (LZ4HC_Data_Structure* hc4, const BYTE* ip, const BYTE* const matchlimit, const BYTE** matchpos)
|
||||
{
|
||||
U16* const chainTable = hc4->chainTable;
|
||||
HTYPE* const HashTable = hc4->hashTable;
|
||||
const BYTE* ref;
|
||||
INITBASE(base,hc4->base);
|
||||
int nbAttempts=MAX_NB_ATTEMPTS;
|
||||
int ml=0;
|
||||
|
||||
// HC4 match finder
|
||||
LZ4HC_Insert(hc4, ip);
|
||||
ref = HASH_POINTER(ip);
|
||||
while ((ref > (ip-MAX_DISTANCE)) && (nbAttempts))
|
||||
{
|
||||
nbAttempts--;
|
||||
if (*(ref+ml) == *(ip+ml))
|
||||
if (*(U32*)ref == *(U32*)ip)
|
||||
{
|
||||
const BYTE* reft = ref+MINMATCH;
|
||||
const BYTE* ipt = ip+MINMATCH;
|
||||
|
||||
while (ipt<matchlimit-(STEPSIZE-1))
|
||||
{
|
||||
UARCH diff = AARCH(reft) ^ AARCH(ipt);
|
||||
if (!diff) { ipt+=STEPSIZE; reft+=STEPSIZE; continue; }
|
||||
ipt += LZ4_NbCommonBytes(diff);
|
||||
goto _endCount;
|
||||
}
|
||||
if (LZ4_ARCH64) if ((ipt<(matchlimit-3)) && (A32(reft) == A32(ipt))) { ipt+=4; reft+=4; }
|
||||
if ((ipt<(matchlimit-1)) && (A16(reft) == A16(ipt))) { ipt+=2; reft+=2; }
|
||||
if ((ipt<matchlimit) && (*reft == *ipt)) ipt++;
|
||||
_endCount:
|
||||
|
||||
if (ipt-ip > ml) { ml = ipt-ip; *matchpos = ref; }
|
||||
}
|
||||
ref = GETNEXT(ref);
|
||||
}
|
||||
|
||||
return ml;
|
||||
}
|
||||
|
||||
|
||||
inline static int LZ4HC_InsertAndGetWiderMatch (LZ4HC_Data_Structure* hc4, const BYTE* ip, const BYTE* startLimit, const BYTE* matchlimit, int longest, const BYTE** matchpos, const BYTE** startpos)
|
||||
{
|
||||
U16* const chainTable = hc4->chainTable;
|
||||
HTYPE* const HashTable = hc4->hashTable;
|
||||
INITBASE(base,hc4->base);
|
||||
const BYTE* ref;
|
||||
int nbAttempts = MAX_NB_ATTEMPTS;
|
||||
int delta = ip-startLimit;
|
||||
|
||||
// First Match
|
||||
LZ4HC_Insert(hc4, ip);
|
||||
ref = HASH_POINTER(ip);
|
||||
|
||||
while ((ref > ip-MAX_DISTANCE) && (ref >= hc4->base) && (nbAttempts))
|
||||
{
|
||||
nbAttempts--;
|
||||
if (*(startLimit + longest) == *(ref - delta + longest))
|
||||
if (*(U32*)ref == *(U32*)ip)
|
||||
{
|
||||
const BYTE* reft = ref+MINMATCH;
|
||||
const BYTE* ipt = ip+MINMATCH;
|
||||
const BYTE* startt = ip;
|
||||
|
||||
while (ipt<matchlimit-(STEPSIZE-1))
|
||||
{
|
||||
UARCH diff = AARCH(reft) ^ AARCH(ipt);
|
||||
if (!diff) { ipt+=STEPSIZE; reft+=STEPSIZE; continue; }
|
||||
ipt += LZ4_NbCommonBytes(diff);
|
||||
goto _endCount;
|
||||
}
|
||||
if (LZ4_ARCH64) if ((ipt<(matchlimit-3)) && (A32(reft) == A32(ipt))) { ipt+=4; reft+=4; }
|
||||
if ((ipt<(matchlimit-1)) && (A16(reft) == A16(ipt))) { ipt+=2; reft+=2; }
|
||||
if ((ipt<matchlimit) && (*reft == *ipt)) ipt++;
|
||||
_endCount:
|
||||
|
||||
reft = ref;
|
||||
while ((startt>startLimit) && (reft > hc4->base) && (startt[-1] == reft[-1])) {startt--; reft--;}
|
||||
|
||||
if ((ipt-startt) > longest)
|
||||
{
|
||||
longest = ipt-startt;
|
||||
*matchpos = reft;
|
||||
*startpos = startt;
|
||||
}
|
||||
}
|
||||
ref = GETNEXT(ref);
|
||||
}
|
||||
|
||||
return longest;
|
||||
}
|
||||
|
||||
|
||||
inline static int LZ4_encodeSequence(const BYTE** ip, BYTE** op, const BYTE** anchor, int ml, const BYTE* ref)
|
||||
{
|
||||
int length, len;
|
||||
BYTE* token;
|
||||
|
||||
// Encode Literal length
|
||||
length = *ip - *anchor;
|
||||
token = (*op)++;
|
||||
if (length>=(int)RUN_MASK) { *token=(RUN_MASK<<ML_BITS); len = length-RUN_MASK; for(; len > 254 ; len-=255) *(*op)++ = 255; *(*op)++ = (BYTE)len; }
|
||||
else *token = (length<<ML_BITS);
|
||||
|
||||
// Copy Literals
|
||||
LZ4_BLINDCOPY(*anchor, *op, length);
|
||||
|
||||
// Encode Offset
|
||||
LZ4_WRITE_LITTLEENDIAN_16(*op,*ip-ref);
|
||||
|
||||
// Encode MatchLength
|
||||
len = (int)(ml-MINMATCH);
|
||||
if (len>=(int)ML_MASK) { *token+=ML_MASK; len-=ML_MASK; for(; len > 509 ; len-=510) { *(*op)++ = 255; *(*op)++ = 255; } if (len > 254) { len-=255; *(*op)++ = 255; } *(*op)++ = (BYTE)len; }
|
||||
else *token += len;
|
||||
|
||||
// Prepare next loop
|
||||
*ip += ml;
|
||||
*anchor = *ip;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
//****************************
|
||||
// Compression CODE
|
||||
//****************************
|
||||
|
||||
int LZ4_compressHCCtx(LZ4HC_Data_Structure* ctx,
|
||||
const char* source,
|
||||
char* dest,
|
||||
int isize)
|
||||
{
|
||||
const BYTE* ip = (const BYTE*) source;
|
||||
const BYTE* anchor = ip;
|
||||
const BYTE* const iend = ip + isize;
|
||||
const BYTE* const mflimit = iend - MFLIMIT;
|
||||
const BYTE* const matchlimit = (iend - LASTLITERALS);
|
||||
|
||||
BYTE* op = (BYTE*) dest;
|
||||
|
||||
int ml, ml2, ml3, ml0;
|
||||
const BYTE* ref=NULL;
|
||||
const BYTE* start2=NULL;
|
||||
const BYTE* ref2=NULL;
|
||||
const BYTE* start3=NULL;
|
||||
const BYTE* ref3=NULL;
|
||||
const BYTE* start0;
|
||||
const BYTE* ref0;
|
||||
|
||||
ip++;
|
||||
|
||||
// Main Loop
|
||||
while (ip < mflimit)
|
||||
{
|
||||
ml = LZ4HC_InsertAndFindBestMatch (ctx, ip, matchlimit, (&ref));
|
||||
if (!ml) { ip++; continue; }
|
||||
|
||||
// saved, in case we would skip too much
|
||||
start0 = ip;
|
||||
ref0 = ref;
|
||||
ml0 = ml;
|
||||
|
||||
_Search2:
|
||||
if (ip+ml < mflimit)
|
||||
ml2 = LZ4HC_InsertAndGetWiderMatch(ctx, ip + ml - 2, ip + 1, matchlimit, ml, &ref2, &start2);
|
||||
else ml2=ml;
|
||||
|
||||
if (ml2 == ml) // No better match
|
||||
{
|
||||
LZ4_encodeSequence(&ip, &op, &anchor, ml, ref);
|
||||
continue;
|
||||
}
|
||||
|
||||
if (start0 < ip)
|
||||
{
|
||||
if (start2 < ip + ml0) // empirical
|
||||
{
|
||||
ip = start0;
|
||||
ref = ref0;
|
||||
ml = ml0;
|
||||
}
|
||||
}
|
||||
|
||||
// Here, start0==ip
|
||||
if ((start2 - ip) < 3) // First Match too small : removed
|
||||
{
|
||||
ml = ml2;
|
||||
ip = start2;
|
||||
ref =ref2;
|
||||
goto _Search2;
|
||||
}
|
||||
|
||||
_Search3:
|
||||
// Currently we have :
|
||||
// ml2 > ml1, and
|
||||
// ip1+3 <= ip2 (usually < ip1+ml1)
|
||||
if ((start2 - ip) < OPTIMAL_ML)
|
||||
{
|
||||
int correction;
|
||||
int new_ml = ml;
|
||||
if (new_ml > OPTIMAL_ML) new_ml = OPTIMAL_ML;
|
||||
if (ip+new_ml > start2 + ml2 - MINMATCH) new_ml = start2 - ip + ml2 - MINMATCH;
|
||||
correction = new_ml - (start2 - ip);
|
||||
if (correction > 0)
|
||||
{
|
||||
start2 += correction;
|
||||
ref2 += correction;
|
||||
ml2 -= correction;
|
||||
}
|
||||
}
|
||||
// Now, we have start2 = ip+new_ml, with new_ml=min(ml, OPTIMAL_ML=18)
|
||||
|
||||
if (start2 + ml2 < mflimit)
|
||||
ml3 = LZ4HC_InsertAndGetWiderMatch(ctx, start2 + ml2 - 3, start2, matchlimit, ml2, &ref3, &start3);
|
||||
else ml3=ml2;
|
||||
|
||||
if (ml3 == ml2) // No better match : 2 sequences to encode
|
||||
{
|
||||
// ip & ref are known; Now for ml
|
||||
if (start2 < ip+ml)
|
||||
{
|
||||
if ((start2 - ip) < OPTIMAL_ML)
|
||||
{
|
||||
int correction;
|
||||
if (ml > OPTIMAL_ML) ml = OPTIMAL_ML;
|
||||
if (ip+ml > start2 + ml2 - MINMATCH) ml = start2 - ip + ml2 - MINMATCH;
|
||||
correction = ml - (start2 - ip);
|
||||
if (correction > 0)
|
||||
{
|
||||
start2 += correction;
|
||||
ref2 += correction;
|
||||
ml2 -= correction;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
ml = start2 - ip;
|
||||
}
|
||||
}
|
||||
// Now, encode 2 sequences
|
||||
LZ4_encodeSequence(&ip, &op, &anchor, ml, ref);
|
||||
ip = start2;
|
||||
LZ4_encodeSequence(&ip, &op, &anchor, ml2, ref2);
|
||||
continue;
|
||||
}
|
||||
|
||||
if (start3 < ip+ml+3) // Not enough space for match 2 : remove it
|
||||
{
|
||||
if (start3 >= (ip+ml)) // can write Seq1 immediately ==> Seq2 is removed, so Seq3 becomes Seq1
|
||||
{
|
||||
if (start2 < ip+ml)
|
||||
{
|
||||
int correction = (ip+ml) - start2;
|
||||
start2 += correction;
|
||||
ref2 += correction;
|
||||
ml2 -= correction;
|
||||
if (ml2 < MINMATCH)
|
||||
{
|
||||
start2 = start3;
|
||||
ref2 = ref3;
|
||||
ml2 = ml3;
|
||||
}
|
||||
}
|
||||
|
||||
LZ4_encodeSequence(&ip, &op, &anchor, ml, ref);
|
||||
ip = start3;
|
||||
ref = ref3;
|
||||
ml = ml3;
|
||||
|
||||
start0 = start2;
|
||||
ref0 = ref2;
|
||||
ml0 = ml2;
|
||||
goto _Search2;
|
||||
}
|
||||
|
||||
start2 = start3;
|
||||
ref2 = ref3;
|
||||
ml2 = ml3;
|
||||
goto _Search3;
|
||||
}
|
||||
|
||||
// OK, now we have 3 ascending matches; let's write at least the first one
|
||||
// ip & ref are known; Now for ml
|
||||
if (start2 < ip+ml)
|
||||
{
|
||||
if ((start2 - ip) < (int)ML_MASK)
|
||||
{
|
||||
int correction;
|
||||
if (ml > OPTIMAL_ML) ml = OPTIMAL_ML;
|
||||
if (ip + ml > start2 + ml2 - MINMATCH) ml = start2 - ip + ml2 - MINMATCH;
|
||||
correction = ml - (start2 - ip);
|
||||
if (correction > 0)
|
||||
{
|
||||
start2 += correction;
|
||||
ref2 += correction;
|
||||
ml2 -= correction;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
ml = start2 - ip;
|
||||
}
|
||||
}
|
||||
LZ4_encodeSequence(&ip, &op, &anchor, ml, ref);
|
||||
|
||||
ip = start2;
|
||||
ref = ref2;
|
||||
ml = ml2;
|
||||
|
||||
start2 = start3;
|
||||
ref2 = ref3;
|
||||
ml2 = ml3;
|
||||
|
||||
goto _Search3;
|
||||
|
||||
}
|
||||
|
||||
// Encode Last Literals
|
||||
{
|
||||
int lastRun = iend - anchor;
|
||||
if (lastRun>=(int)RUN_MASK) { *op++=(RUN_MASK<<ML_BITS); lastRun-=RUN_MASK; for(; lastRun > 254 ; lastRun-=255) *op++ = 255; *op++ = (BYTE) lastRun; }
|
||||
else *op++ = (lastRun<<ML_BITS);
|
||||
memcpy(op, anchor, iend - anchor);
|
||||
op += iend-anchor;
|
||||
}
|
||||
|
||||
// End
|
||||
return (int) (((char*)op)-dest);
|
||||
}
|
||||
|
||||
|
||||
int LZ4_compressHC(const char* source,
|
||||
char* dest,
|
||||
int isize)
|
||||
{
|
||||
void* ctx = LZ4HC_Create((const BYTE*)source);
|
||||
int result = LZ4_compressHCCtx(ctx, source, dest, isize);
|
||||
LZ4HC_Free (&ctx);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
|
|
@ -0,0 +1,60 @@
|
|||
/*
|
||||
LZ4 HC - High Compression Mode of LZ4
|
||||
Header File
|
||||
Copyright (C) 2011-2012, Yann Collet.
|
||||
BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
|
||||
|
||||
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.
|
||||
|
||||
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.
|
||||
|
||||
You can contact the author at :
|
||||
- LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
|
||||
- LZ4 source repository : http://code.google.com/p/lz4/
|
||||
*/
|
||||
#pragma once
|
||||
|
||||
|
||||
#if defined (__cplusplus)
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
|
||||
int LZ4_compressHC (const char* source, char* dest, int isize);
|
||||
|
||||
/*
|
||||
LZ4_compressHC :
|
||||
return : the number of bytes in compressed buffer dest
|
||||
note : destination buffer must be already allocated.
|
||||
To avoid any problem, size it to handle worst cases situations (input data not compressible)
|
||||
Worst case size evaluation is provided by function LZ4_compressBound() (see "lz4.h")
|
||||
*/
|
||||
|
||||
|
||||
/* Note :
|
||||
Decompression functions are provided within regular LZ4 source code (see "lz4.h") (BSD license)
|
||||
*/
|
||||
|
||||
|
||||
#if defined (__cplusplus)
|
||||
}
|
||||
#endif
|
Loading…
Reference in New Issue