libfdt: Increase namespace-pollution paranoia

libfdt is supposed to easy to embed in projects all and sundry.
Often, it won't be practical to separate the embedded libfdt's
namespace from that of the surrounding project.  Which means there can
be namespace conflicts between even libfdt's internal/static functions
and functions or macros coming from the surrounding project's headers
via libfdt_env.h.

This patch, therefore, renames a bunch of libfdt internal functions
and macros and makes a few other chances to reduce the chances of
namespace collisions with embedding projects.  Specifically:
	- Internal functions (even static ones) are now named _fdt_*()

	- The type and (static) global for the error table in
          fdt_strerror() gain an fdt_ prefix

	- The unused macro PALIGN is removed

	- The memeq and streq macros are removed and open-coded in the
          users (they were only used once each)

	- Other macros gain an FDT_ prefix

	- To save some of the bulk from the previous change, an
          FDT_TAGALIGN() macro is introduced, where FDT_TAGALIGN(x) ==
          FDT_ALIGN(x, FDT_TAGSIZE)

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 4 insertions, 7 deletions

diff --git a/libfdt/libfdt_internal.h b/libfdt/libfdt_internal.h
index 549e345..46eb93e 100644
--- a/libfdt/libfdt_internal.h
+++ b/libfdt/libfdt_internal.h
@@ -52,13 +52,10 @@
  */
 #include <fdt.h>
 
-#define ALIGN(x, a)	(((x) + (a) - 1) & ~((a) - 1))
-#define PALIGN(p, a)	((void *)ALIGN((unsigned long)(p), (a)))
+#define FDT_ALIGN(x, a)		(((x) + (a) - 1) & ~((a) - 1))
+#define FDT_TAGALIGN(x)		(FDT_ALIGN((x), FDT_TAGSIZE))
 
-#define memeq(p, q, n)	(memcmp((p), (q), (n)) == 0)
-#define streq(p, q)	(strcmp((p), (q)) == 0)
-
-#define CHECK_HEADER(fdt) \
+#define FDT_CHECK_HEADER(fdt) \
 	{ \
 		int err; \
 		if ((err = fdt_check_header(fdt)) != 0) \
@@ -93,6 +90,6 @@ static inline struct fdt_reserve_entry *_fdt_mem_rsv_w(void *fdt, int n)
 	return (void *)(uintptr_t)_fdt_mem_rsv(fdt, n);
 }
 
-#define SW_MAGIC		(~FDT_MAGIC)
+#define FDT_SW_MAGIC		(~FDT_MAGIC)
 
 #endif /* _LIBFDT_INTERNAL_H */