Add bzip2 filter to build system

setup.py

@@ -700,6 +700,30 @@ def prefix(directory, files):
     )
 
 
+# BZIP2
+bzip2_dir = "src/bzip2"
+bzip2_sources = prefix(
+    bzip2_dir,
+    ["blocksort.c", "huffman.c", "crctable.c", "randtable.c", "compress.c", "decompress.c", "bzlib.c"])
+bzip2_depends = glob(bzip2_dir + "/*.h")
+bzip2_include_dirs = [bzip2_dir]
+bzip2_extra_compile_args = [
+    "-Wall",
+    "-Winline",
+    "-O2",
+    "-g",
+    "-D_FILE_OFFSET_BITS=64"
+]
+
+bzip2_plugin = HDF5PluginExtension(
+    "hdf5plugin.plugins.libh5bzip2",
+    sources=['src/PyTables/src/H5Zbzip2.c', 'src/H5Zbzip2_plugin.c'] + bzip2_sources,
+    depends=['src/PyTables/src/H5Zbzip2.h'] + bzip2_depends,
+    include_dirs=['src/PyTables/src/'] + bzip2_include_dirs,
+    define_macros=[('HAVE_BZ2_LIB', 1)],
+    extra_compile_args=bzip2_extra_compile_args,
+    )
+
 # FCIDECOMP
 fcidecomp_dir = 'src/fcidecomp/FCIDECOMP_V1.0.2/Software/FCIDECOMP_SOURCES'
 extra_compile_args = ['-O3', '-ffast-math', '-std=c99', '-fopenmp']
@@ -778,7 +802,8 @@ def prefix(directory, files):
 
 libraries = [snappy_lib, charls_lib, zfp_lib]
 
-extensions = [lz4_plugin,
+extensions = [bzip2_plugin,
+              lz4_plugin,
               bithsuffle_plugin,
               blosc_plugin,
               fcidecomp_plugin,

src/H5Zbzip2_plugin.c

@@ -0,0 +1,28 @@
+/*
+ * Dynamically loaded filter plugin for HDF5 BZip2 filter.
+ *
+ *
+ */
+
+#include "H5Zbzip2.h"
+#include "H5PLextern.h"
+
+size_t bzip2_deflate(unsigned int flags, size_t cd_nelmts,
+                     const unsigned int cd_values[], size_t nbytes,
+                     size_t *buf_size, void **buf);
+
+
+const H5Z_class_t H5Z_BZIP2[1] = {
+  {
+    H5Z_CLASS_T_VERS,             /* H5Z_class_t version */
+    (H5Z_filter_t)(FILTER_BZIP2), /* filter_id */
+    1, 1,                         /* Encoding and decoding enabled */
+    "bzip2",                      /* comment */
+    NULL,                         /* can_apply_func */
+    NULL,                         /* set_local_func */
+    (H5Z_func_t)(bzip2_deflate)   /* filter_func */
+  }
+};
+
+H5PL_type_t H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
+const void *H5PLget_plugin_info(void) {return H5Z_BZIP2;}