order: Scalar comparison functions

[ccan] / ccan / order / order.h

diff --git a/ccan/order/order.h b/ccan/order/order.h
index f5dac818d898cec5762726fe1136d70e58a611b2..edceab5551e2e68dd14bee39bf7ac4a12663841b 100644 (file)
--- 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 */