From: Götz Lindenmaier <goetz@ipd.info.uni-karlsruhe.de>
Date: Tue, 16 Nov 2004 10:16:27 +0000 (+0000)
Subject: added makro to shrink an array by resetting the length
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=55fc452ebce1902eb2e405488fda20da6eb034ce;p=libfirm

added makro to shrink an array by resetting the length

[r4403]
---

diff --git a/ir/adt/array.h b/ir/adt/array.h
index d42322ec3..7db99bd7d 100644
--- a/ir/adt/array.h
+++ b/ir/adt/array.h
@@ -230,6 +230,12 @@
 #define ARR_SETLEN(type, arr, n)					\
   (XMALLOC_TRACE (arr) = _arr_setlen ((arr), (n), sizeof(type) * (n)))
 
+/** Set a length smaller than the current length of the array.  Do not
+ *  resize. len must be <= ARR_LEN(arr). */
+#define ARR_SHRINKLEN(arr,len)                                          \
+   (ARR_VRFY ((arr)), assert(_ARR_DESCR((arr))->nelts >= len),             \
+    _ARR_DESCR((arr))->nelts = len)
+
 /**
  * Resize a flexible array by growing it by delta elements.
  *