Changeset bf36c4 in git for Singular/maps_ip.cc

Timestamp:

May 27, 2015, 8:09:51 PM (9 years ago)

Author:

Oleksandr Motsak <motsak@…>

Branches:

(u'fieker-DuVal', '117eb8c30fc9e991c4decca4832b1d19036c4c65')(u'spielwiese', '38dfc5131670d387a89455159ed1e071997eec94')

Children:

49b7480ebc6b89c61ea6555f8f339873abbac069

Parents:

794d7ba210aeabf2fc6caef7b75934cab4be8acf

git-author:

Oleksandr Motsak <motsak@mathematik.uni-kl.de>2015-05-27 20:09:51+02:00

git-committer:

Oleksandr Motsak <motsak@mathematik.uni-kl.de>2015-05-27 21:24:40+02:00

Message:

Fixing dirty hacks (map -> ideal) for fast_map

File:

• Singular/maps_ip.cc (modified) (2 diffs)

Singular/maps_ip.cc

@@ -44 +44 @@
 #endif
 
+#include <algorithm>
 
 /*2
@@ -391 +392 @@
     ideal src_id=idInit(1,1);
     src_id->m[0]=p;
-    ideal res_id=fast_map(src_id,currRing,(ideal)theMap,currRing);
+    
+    char *tmp = (char*)1;
+    std::swap(tmp, theMap->preimage); // map gets 1 as its rank (as an ideal)
+    ideal res_id=fast_map(src_id,currRing,(ideal)theMap,currRing); // FIXME: this dirty hack from original Singular!
+    std::swap(tmp, theMap->preimage); // map gets its preimage back
+    assume( tmp == (char*)1 );
+    
     res=res_id->m[0];
     res_id->m[0]=NULL; idDelete(&res_id);