Fix unaligned memory access on Sparc

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@1892 9d0c8265-081b-0410-96cb-a4ca84ce46f8

1 files changed, 35 insertions, 0 deletions

diff --git a/lib/util/wordaccess_be_aligned.h b/lib/util/wordaccess_be_aligned.h
new file mode 100644
index 00000000..0d5809e6
--- /dev/null
+++ b/lib/util/wordaccess_be_aligned.h
@@ -0,0 +1,35 @@
+/*=============================================================================
+  This file is the part of wordaccess.h for use under with big-endian
+  machines that require word accesses to be word-aligned.
+*===========================================================================*/
+
+typedef unsigned long int wordint;
+typedef unsigned char wordintBytes[sizeof(wordint)];
+
+static __inline__ wordint
+bytesToWordint(wordintBytes bytes) {
+    uint16_t const hi = *((uint16_t *) (bytes + 0));
+    uint16_t const mh = *((uint16_t *) (bytes + 2));
+    uint16_t const ml = *((uint16_t *) (bytes + 4));
+    uint16_t const lo = *((uint16_t *) (bytes + 6));
+    return
+        (((wordint) hi) << 48) |
+        (((wordint) mh) << 32) |
+        (((wordint) ml) << 24) |
+        (((wordint) lo) <<  0);
+}
+
+
+
+static __inline__ void
+wordintToBytes(wordintBytes * const bytesP,
+               wordint        const wordInt) {
+    uint16_t const hi = ((wordInt >> 48) & 0xFF)
+    uint16_t const mh = ((wordInt >> 32) & 0xFF);
+    uint16_t const ml = ((wordInt >> 24) & 0xFF);
+    uint16_t const lo = ((wordInt >>  0) & 0xFF);
+    *(uint16_t *)(bytesP + 0) = hi;
+    *(uint16_t *)(bytesP + 2) = mh;
+    *(uint16_t *)(bytesP + 4) = ml;
+    *(uint16_t *)(bytesP + 6) = lo;
+}