#! /bin/sh /usr/share/dpatch/dpatch-run
## 05-base64-64bit-bigendian.dpatch by  <address@hidden>
##
## All lines beginning with `## DP:' are a description of the patch.
## DP: homegrown base64 decoder fails on all big-endian and 64-bit architectures (like s390x)

@DPATCH@
diff -urNad '--exclude=CVS' '--exclude=.svn' '--exclude=.git' '--exclude=.arch' '--exclude=.hg' '--exclude=_darcs' '--exclude=.bzr' nmh-1.5-release~/uip/mhparse.c nmh-1.5-release/uip/mhparse.c
--- nmh-1.5-release~/uip/mhparse.c	2012-06-14 16:35:36.000000000 +1000
+++ nmh-1.5-release/uip/mhparse.c	2012-06-14 16:36:02.322155163 +1000
@@ -1737,10 +1737,15 @@
     CE ce;
     MD5_CTX mdContext;
 
+    /* the decoder works on the least-significant three bytes of the bits integer,
+       but their position in memory depend on both endian-ness and size of 
+       long int... for little-endian architectures the size is irrelevant, for
+       big-endian archs it's crucial... ideally we'd adopt posix and use a64l instead
+       of this mess. */
     b  = (unsigned char *) &bits;
-    b1 = &b[endian > 0 ? 1 : 2];
-    b2 = &b[endian > 0 ? 2 : 1];
-    b3 = &b[endian > 0 ? 3 : 0];
+    b1 = &b[endian > 0 ? sizeof(bits)==8?5:1 : 2];
+    b2 = &b[endian > 0 ? sizeof(bits)==8?6:2 : 1];
+    b3 = &b[endian > 0 ? sizeof(bits)==8?7:3 : 0];
 
     ce = ct->c_cefile;
     if (ce->ce_fp) {
@@ -2825,10 +2830,16 @@
     unsigned char *dp, value, *ep;
     unsigned char *b, *b1, *b2, *b3;
 
-    b  = (unsigned char *) &bits,
-    b1 = &b[endian > 0 ? 1 : 2],
-    b2 = &b[endian > 0 ? 2 : 1],
-    b3 = &b[endian > 0 ? 3 : 0];
+    /* the decoder works on the least-significant three bytes of the bits integer,
+       but their position in memory depend on both endian-ness and size of 
+       long int... for little-endian architectures the size is irrelevant, for
+       big-endian archs it's crucial... ideally we'd adopt posix and use a64l instead
+       of this mess. */
+    b  = (unsigned char *) &bits;
+    b1 = &b[endian > 0 ? sizeof(bits)==8?5:1 : 2];
+    b2 = &b[endian > 0 ? sizeof(bits)==8?6:2 : 1];
+    b3 = &b[endian > 0 ? sizeof(bits)==8?7:3 : 0];
+
     bitno = 18;
     bits = 0L;
     skip = 0;