Add version()

zstd/_bindings.pyx

@@ -16,6 +16,7 @@ cdef extern from "Python.h":
 cdef extern from "zstd.h":
     # To simplify implementation, we use signed types (and detect errors with
     # negative values). Anyway, that's what `bytes` uses for its length.
+    int          ZSTD_versionNumber()
     ssize_t      ZSTD_compressBound(ssize_t srcSize)
     const char * ZSTD_getErrorName(ssize_t code)
     int          ZSTD_maxCLevel()
@@ -26,6 +27,14 @@ cdef extern from "zstd.h":
     ssize_t      ZSTD_decompress(void *dst, ssize_t dstCapacity,
                                  const void *src, ssize_t compressedSize) nogil
 
+def version():
+    cdef int x = ZSTD_versionNumber()
+    cdef int r = x % 100
+    x /= 100
+    return x / 100, x % 100, r
+
+version = version()
+
 def maxCLevel():
     return ZSTD_maxCLevel()