add IS_LE and IS_BE macros to header

bitarray/_bitarray.c

@@ -225,7 +225,7 @@ shift_r8(bitarrayobject *self, Py_ssize_t a, Py_ssize_t b, int n, int bebr)
 
  /* as the big-endian representation has reversed bit order in each
  byte, we reverse each byte, and (re-) reverse again below */
- if (bebr && self->endian == ENDIAN_BIG)
+ if (bebr && IS_BE(self))
  bytereverse(self, a, b);
 #define ucb ((unsigned char *) (self)->ob_item)
 
@@ -262,7 +262,7 @@ shift_r8(bitarrayobject *self, Py_ssize_t a, Py_ssize_t b, int n, int bebr)
  }
  }
 #undef ucb
- if (bebr && self->endian == ENDIAN_BIG) /* (re-) reverse bytes */
+ if (bebr && IS_BE(self)) /* (re-) reverse bytes */
  bytereverse(self, a, b);
 }
 
@@ -311,8 +311,8 @@ copy_n(bitarrayobject *self, Py_ssize_t a,
  int sa = a % 8;
  int sb = -(b % 8);
  char t1, t2, t3;
- char m1 = ones_table[self->endian == ENDIAN_BIG][sa];
- char m2 = ones_table[self->endian == ENDIAN_BIG][(a + n) % 8];
+ char m1 = ones_table[IS_BE(self)][sa];
+ char m2 = ones_table[IS_BE(self)][(a + n) % 8];
  Py_ssize_t i;
 
  assert(n >= 8);
@@ -2070,7 +2070,7 @@ setslice_bool(bitarrayobject *self, PyObject *slice, PyObject *value)
  setrange(self, start, stop, vi);
  }
  else {
- const char *table = bitmask_table[self->endian == ENDIAN_BIG];
+ const char *table = bitmask_table[IS_BE(self)];
  Py_ssize_t i;
 
  assert(step > 1);

bitarray/_util.c

@@ -12,9 +12,6 @@
 #include "pythoncapi_compat.h"
 #include "bitarray.h"
 
-#define IS_LE(a) ((a)->endian == ENDIAN_LITTLE)
-#define IS_BE(a) ((a)->endian == ENDIAN_BIG)
-
 /* set using the Python module function _set_bato() */
 static PyObject *bitarray_type_obj = NULL;
 

bitarray/bitarray.h

@@ -58,6 +58,9 @@ typedef struct {
 #define ENDIAN_LITTLE 0
 #define ENDIAN_BIG 1
 
+#define IS_LE(self) ((self)->endian == ENDIAN_LITTLE)
+#define IS_BE(self) ((self)->endian == ENDIAN_BIG)
+
 /* the endianness string */
 #define ENDIAN_STR(endian) ((endian) == ENDIAN_LITTLE ? "little" : "big")