itypes: provide a c_size function for size_t.

* itypes.[ch] (c_size): New function.

2 files changed, 17 insertions, 0 deletions

diff --git a/itypes.c b/itypes.c
index 76de9013..a72444e8 100644
--- a/itypes.c
+++ b/itypes.c
@@ -29,6 +29,7 @@
 #include <stddef.h>
 #include <wchar.h>
 #include <signal.h>
+#include <stdlib.h>
 #include "config.h"
 #include "lib.h"
 #include "signal.h"
@@ -262,3 +263,17 @@ unsigned long c_ulong(val n, val self)
 #error portme
 #endif
 }
+
+size_t c_size(val n, val self)
+{
+  switch (sizeof (size_t)) {
+  case sizeof (unsigned):
+    return c_uint(n, self);
+#if SIZEOF_LONG != SIZEOF_INT
+  case sizeof (unsigned long):
+    return c_ulong(n, self);
+#endif
+  default:
+    abort();
+  }
+}
diff --git a/itypes.h b/itypes.h
index 35ef9c92..497486c7 100644
--- a/itypes.h
+++ b/itypes.h
@@ -117,3 +117,5 @@ unsigned int c_uint(val, val self);
 
 long c_long(val, val self);
 unsigned long c_ulong(val, val self);
+
+size_t c_size(val, val self);