lots of goodnes

1 files changed, 17 insertions, 0 deletions

diff --git a/src/common.hff b/src/common.hff
index 4da1398..6643dda 100644
--- a/src/common.hff
+++ b/src/common.hff
@@ -25,6 +25,16 @@ defmacro foreach(x, i, a, &body) [
    }
 ]
 
+defmacro foreach_ptr(x, i, a, &body) [
+   {
+      let $a = a;
+      for let i = 0; i < $a.#len; ++i {
+         let x = &$a[i];
+         { body }
+      }
+   }
+]
+
 defmacro streq(a,b) [ (strcmp(a,b) == 0) ]
 defmacro strcieq(a,b) [ (strcasecmp(a,b) == 0) ]
 
@@ -42,6 +52,13 @@ defmacro with_tmpchange(var,x,&body) [
 
 defmacro MAX(a,b) [((a) > (b) ? (a) : (b))]
 
+defmacro offsetof_(T, fld) [
+   (as(isize)(&(as(*T)#null).fld))
+]
+defmacro container_of(x, T, fld) [
+   (as(*T)(as(*void)(x) - offsetof_(T, fld)))
+]
+
 // Inline functions
 fn bswap32(x u32) u32 {
    return (x >> 24)