ewah/bitmap: silence warning about MASK macro redefinition

On PowerPC Mac OS X (10.5.8 "Leopard" with Xcode 3.1),
system header /usr/include/ppc/param.h[1] pollutes the
preprocessor namespace with a macro generically named MASK.
This conflicts with the same-named macro in ewah/bitmap.c.
We can avoid this conflict by using a more specific name.

[1]: Included indirectly via:
     git-compat-util.h ->
     sys/sysctl.h ->
     sys/ucred.h ->
     sys/param.h ->
     machine/param.h ->
     ppc/param.h

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/ewah/bitmap.c b/ewah/bitmap.c
index 710e58c..2af94f6 100644 (file)
--- a/ewah/bitmap.c
+++ b/ewah/bitmap.c
@@ -20,8 +20,8 @@
 #include "git-compat-util.h"
 #include "ewok.h"
 
-#define MASK(x) ((eword_t)1 << (x % BITS_IN_WORD))
-#define BLOCK(x) (x / BITS_IN_WORD)
+#define EWAH_MASK(x) ((eword_t)1 << (x % BITS_IN_WORD))
+#define EWAH_BLOCK(x) (x / BITS_IN_WORD)
 
 struct bitmap *bitmap_new(void)
 {
@@ -33,7 +33,7 @@ struct bitmap *bitmap_new(void)
 
 void bitmap_set(struct bitmap *self, size_t pos)
 {
-       size_t block = BLOCK(pos);
+       size_t block = EWAH_BLOCK(pos);
 
        if (block >= self->word_alloc) {
                size_t old_size = self->word_alloc;
@@ -45,22 +45,22 @@ void bitmap_set(struct bitmap *self, size_t pos)
                        (self->word_alloc - old_size) * sizeof(eword_t));
        }
 
-       self->words[block] |= MASK(pos);
+       self->words[block] |= EWAH_MASK(pos);
 }
 
 void bitmap_clear(struct bitmap *self, size_t pos)
 {
-       size_t block = BLOCK(pos);
+       size_t block = EWAH_BLOCK(pos);
 
        if (block < self->word_alloc)
-               self->words[block] &= ~MASK(pos);
+               self->words[block] &= ~EWAH_MASK(pos);
 }
 
 int bitmap_get(struct bitmap *self, size_t pos)
 {
-       size_t block = BLOCK(pos);
+       size_t block = EWAH_BLOCK(pos);
        return block < self->word_alloc &&
-               (self->words[block] & MASK(pos)) != 0;
+               (self->words[block] & EWAH_MASK(pos)) != 0;
 }
 
 struct ewah_bitmap *bitmap_to_ewah(struct bitmap *bitmap)