Implement alloc/free fns local to pyeclib c_ext

... stop using helpers internal to liberasurecode

1 files changed, 45 insertions, 1 deletions

diff --git a/src/c/pyeclib_c/pyeclib_c.c b/src/c/pyeclib_c/pyeclib_c.c
index e2d98c3..5250709 100644
--- a/src/c/pyeclib_c/pyeclib_c.c
+++ b/src/c/pyeclib_c/pyeclib_c.c
@@ -30,7 +30,6 @@
 #include "capsulethunk.h"
 
 #include <erasurecode.h>
-#include <erasurecode_helpers.h>
 #include <math.h>
 #include <pyeclib_c.h>
 #include <bytesobject.h>
@@ -87,6 +86,51 @@ static PyObject *import_class(const char *module, const char *cls)
     return (PyObject *) PyObject_GetAttrString(s, cls);
 }
 
+/**
+ * Allocate a buffer of a specific size and set its' contents
+ * to the specified value.
+ *
+ * @param size integer size in bytes of buffer to allocate
+ * @param value
+ * @return pointer to start of allocated buffer or NULL on error
+ */
+void * alloc_and_set_buffer(int size, int value) {
+    void * buf = NULL;  /* buffer to allocate and return */
+  
+    /* Allocate and zero the buffer, or set the appropriate error */
+    buf = malloc((size_t) size);
+    if (buf) {
+        buf = memset(buf, value, (size_t) size);
+    }
+    return buf;
+}
+
+/**
+ * Allocate a zero-ed buffer of a specific size.
+ *
+ * @param size integer size in bytes of buffer to allocate
+ * @return pointer to start of allocated buffer or NULL on error
+ */
+void * alloc_zeroed_buffer(int size)
+{
+    return alloc_and_set_buffer(size, 0);
+}
+
+/**
+ * Deallocate memory buffer if it's not NULL.  This methods returns NULL so 
+ * that you can free and reset a buffer using a single line as follows:
+ *
+ * my_ptr = check_and_free_buffer(my_ptr);
+ *
+ * @return NULL
+ */
+void * check_and_free_buffer(void * buf)
+{
+    if (buf)
+        free(buf);
+    return NULL;
+}
+
 void
 pyeclib_c_seterr(int ret, const char * prefix)
 {