X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fmacro.h;h=3f30aa78920b4dad34e554d07fd6e8a42fef7760;hp=acfc277517296cb2da8b1625ec223f9e0fc286cd;hb=9b3c575ed90bb1165a192dfae2fb2330baab583c;hpb=03467c88fba6caeffce2a57a31ee2344e3d3ba31

diff --git a/src/macro.h b/src/macro.h
index acfc27751..3f30aa789 100644
--- a/src/macro.h
+++ b/src/macro.h
@@ -24,6 +24,8 @@
 
 #include <assert.h>
 #include <sys/types.h>
+#include <sys/uio.h>
+#include <inttypes.h>
 
 #define _printf_attr_(a,b) __attribute__ ((format (printf, a, b)))
 #define _sentinel_ __attribute__ ((sentinel))
@@ -41,27 +43,42 @@
 #define _public_ __attribute__ ((visibility("default")))
 #define _hidden_ __attribute__ ((visibility("hidden")))
 #define _weakref_(x) __attribute__((weakref(#x)))
+#define _introspect_(x) __attribute__((section("introspect." x)))
+
+#define XSTRINGIFY(x) #x
+#define STRINGIFY(x) XSTRINGIFY(x)
 
 /* Rounds up */
-static inline size_t ALIGN(size_t l) {
-        return ((l + sizeof(void*) - 1) & ~(sizeof(void*) - 1));
+#define ALIGN(l) ALIGN_TO((l), sizeof(void*))
+static inline size_t ALIGN_TO(size_t l, size_t ali) {
+        return ((l + ali - 1) & ~(ali - 1));
 }
 
 #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
 
+#ifndef MAX
 #define MAX(a,b)                                \
         __extension__ ({                        \
                         typeof(a) _a = (a);     \
                         typeof(b) _b = (b);     \
                         _a > _b ? _a : _b;      \
                 })
+#endif
 
+#define MAX3(a,b,c)                             \
+        MAX(MAX(a,b),c)
+
+#ifndef MIN
 #define MIN(a,b)                                \
         __extension__ ({                        \
                         typeof(a) _a = (a);     \
                         typeof(b) _b = (b);     \
                         _a < _b ? _a : _b;      \
                 })
+#endif
+
+#define MIN3(a,b,c)                             \
+        MIN(MIN(a,b),c)
 
 #define CLAMP(x, low, high)                                             \
         __extension__ ({                                                \
@@ -132,7 +149,35 @@ static inline size_t ALIGN(size_t l) {
                 char *_s = (char *)(s);         \
                 _i->iov_base = _s;              \
                 _i->iov_len = strlen(_s);       \
-        } while(false);
+        } while(false)
+
+static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
+        unsigned j;
+        size_t r = 0;
+
+        for (j = 0; j < n; j++)
+                r += i[j].iov_len;
+
+        return r;
+}
+
+static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
+        unsigned j;
+
+        for (j = 0; j < n; j++) {
+                size_t sub;
+
+                if (_unlikely_(k <= 0))
+                        break;
+
+                sub = MIN(i[j].iov_len, k);
+                i[j].iov_len -= sub;
+                i[j].iov_base = (uint8_t*) i[j].iov_base + sub;
+                k -= sub;
+        }
+
+        return k;
+}
 
 #include "log.h"