X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Forder%2Forder.h;fp=ccan%2Forder%2Forder.h;h=edceab5551e2e68dd14bee39bf7ac4a12663841b;hb=37825438b65879dad1a343b45bb5ce9fc37ba8e7;hp=f5dac818d898cec5762726fe1136d70e58a611b2;hpb=c2a3098b254830f33e800bfa398882786632631e;p=ccan

diff --git a/ccan/order/order.h b/ccan/order/order.h
index f5dac818..edceab55 100644
--- a/ccan/order/order.h
+++ b/ccan/order/order.h
@@ -6,6 +6,7 @@
 #include <assert.h>
 
 #include <ccan/typesafe_cb/typesafe_cb.h>
+#include <ccan/ptrint/ptrint.h>
 
 typedef int (*_total_order_cb)(const void *, const void *, void *);
 typedef int (*total_order_noctx_cb)(const void *, const void *);
@@ -30,4 +31,43 @@ struct _total_order {
 		_ctx ctx;				\
 	} _name
 
+#define _DECL_ONAME(_oname, _itype)					\
+	extern int _order_##_oname(const void *, const void *, void *);	\
+	extern int order_##_oname(const _itype *, const _itype *, void *); \
+	extern int order_##_oname##_noctx(const void *, const void *);
+
+#define _DECL_ONAME_BIDIR(_oname, _itype)				\
+	_DECL_ONAME(_oname, _itype)					\
+	_DECL_ONAME(_oname##_reverse, _itype)
+
+_DECL_ONAME_BIDIR(s8, int8_t)
+_DECL_ONAME_BIDIR(s16, int16_t)
+_DECL_ONAME_BIDIR(s32, int32_t)
+_DECL_ONAME_BIDIR(s64, int64_t)
+
+_DECL_ONAME_BIDIR(u8, uint8_t)
+_DECL_ONAME_BIDIR(u16, uint16_t)
+_DECL_ONAME_BIDIR(u32, uint32_t)
+_DECL_ONAME_BIDIR(u64, uint64_t)
+
+_DECL_ONAME_BIDIR(int, int)
+_DECL_ONAME_BIDIR(uint, unsigned int)
+_DECL_ONAME_BIDIR(long, long)
+_DECL_ONAME_BIDIR(ulong, unsigned long)
+_DECL_ONAME_BIDIR(size, size_t)
+_DECL_ONAME_BIDIR(ptrdiff, ptrdiff_t)
+
+_DECL_ONAME_BIDIR(float, float)
+_DECL_ONAME_BIDIR(double, double)
+
+#undef _DECL_ONAME
+#undef _DECL_ONAME_BIDIR
+
+#define total_order_by_field(_name, _oname, _itype, _field)		\
+	total_order(_name, _itype, ptrint_t *) = {			\
+		(total_order_cb(, _itype,				\
+				ptrint_t *))(_order_##_oname),		\
+		int2ptr(offsetof(_itype, _field)),			\
+	}
+
 #endif /* CCAN_ORDER_H */