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-rw-r--r--pack.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/pack.c b/pack.c
index 780923f..848d9fd 100644
--- a/pack.c
+++ b/pack.c
@@ -78,7 +78,9 @@ TOKEN_PASTE(swap,x)(z) \
return r; \
}
+#ifndef swap16
#define swap16(x) ((((x)&0xFF)<<8) | (((x)>>8)&0xFF))
+#endif
#if SIZEOF_SHORT == 2
#define swaps(x) swap16(x)
#else
@@ -92,10 +94,12 @@ define_swapx(s,short);
#endif
#endif
+#ifndef swap32
#define swap32(x) ((((x)&0xFF)<<24) \
|(((x)>>24)&0xFF) \
|(((x)&0x0000FF00)<<8) \
|(((x)&0x00FF0000)>>8) )
+#endif
#if SIZEOF_LONG == 4
#define swapl(x) swap32(x)
#else