1 files changed, 92 insertions, 0 deletions
diff --git a/funtools/filter/swap.c b/funtools/filter/swap.c
new file mode 100644
index 0000000..e7c9bfd
--- /dev/null
+++ b/funtools/filter/swap.c
@@ -0,0 +1,92 @@
+#if __DARWIN_BYTE_ORDER
+#define XBYTE_ORDER __DARWIN_BYTE_ORDER
+#else
+#define XBYTE_ORDER 0
+#endif
+
+#ifndef MYBYTE_ORDER
+#define MYBYTE_ORDER XBYTE_ORDER
+#endif
+
+#ifndef DO_FILTER_SWAP
+#if (XBYTE_ORDER !=0) && (XBYTE_ORDER != MYBYTE_ORDER)
+#define DO_FILTER_SWAP 1
+#endif
+#endif
+
+#if DO_FILTER_SWAP
+char *_sw2(char *s, int n, char *_swf, int off)
+{
+  char c;
+  char *t=s;
+  size_t i;
+  if( !_swf || !_swf[off]++ ){
+    for (i=0; i<n; i += 2, s += 2) {
+      c      = *s;
+      *(s)   = *(s+1);
+      *(s+1) = c;
+    }
+  }
+  return t;
+}
+
+char *_sw4(char *s, int n, char *_swf, int off)
+{
+  char c;
+  char *t=s;
+  size_t i;
+  if( !_swf || !_swf[off]++ ){
+    for (i=0; i<n; i += 4, s += 4) {
+      c      = *s;
+      *s     = *(s+3);
+      *(s+3) = c;
+      c      = *(s+1);
+      *(s+1) = *(s+2);
+      *(s+2) = c;
+    }
+  }
+  return t;
+}
+
+char *_sw8(char *s, int n, char *_swf, int off)
+{
+  char c;
+  char *t=s;
+  size_t i;
+  if( !_swf || !_swf[off]++ ){
+    for (i=0; i<n; i += 8, s += 8) {
+      c      = *(s+0);
+      *(s+0) = *(s+7);
+      *(s+7) = c;
+      c      = *(s+1);
+      *(s+1) = *(s+6);
+      *(s+6) = c;
+      c      = *(s+2);
+      *(s+2) = *(s+5);
+      *(s+5) = c;
+      c      = *(s+3);
+      *(s+3) = *(s+4);
+      *(s+4) = c;
+    }
+  }
+  return t;
+}
+
+#define SW1(a,n,b,i) a
+#define SW2(a,n,b,i) _sw2(a,n,b,i)
+#define SW4(a,n,b,i) _sw4(a,n,b,i)
+#define SW8(a,n,b,i) _sw8(a,n,b,i)
+
+#if defined(FILTER_PTYPE) && (FILTER_PTYPE != c)
+#error "FILTER_PTYPE environment variable must be 'c' when running with Rosetta"
+#endif
+
+#else
+
+#define SW1(a,n,b,i) a
+#define SW2(a,n,b,i) a
+#define SW4(a,n,b,i) a
+#define SW8(a,n,b,i) a
+
+#endif
+