115 lines
2.2 KiB
C
115 lines
2.2 KiB
C
--- ./shared/shared.c.orig Tue May 23 20:05:59 2006
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+++ ./shared/shared.c Tue May 23 20:06:00 2006
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@@ -539,3 +539,112 @@
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dest--;
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}
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}
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+
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+/*
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+==============================================================================
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+
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+ BYTE ORDER FUNCTIONS
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+
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+==============================================================================
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+*/
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+
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+qBool bigendien;
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+
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+/*
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+ * Can't just use function pointers, or DLL linkage can mess up when qcommon
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+ * is included in multiple places.
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+ */
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+
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+int16 (*_LittleShort) (int16 l);
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+int32 (*_LittleLong) (int32 l);
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+float (*_LittleFloat) (float l);
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+int16 (*_BigShort) (int16 l);
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+int32 (*_BigLong) (int32 l);
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+float (*_BigFloat) (float l);
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+
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+int16 LittleShort (int16 l) { return _LittleShort(l); }
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+int32 LittleLong (int32 l) { return _LittleLong(l); }
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+float LittleFloat (float l) { return _LittleFloat(l); }
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+int16 BigShort (int16 l) { return _BigShort(l); }
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+int32 BigLong (int32 l) { return _BigLong(l); }
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+float BigFloat (float l) { return _BigFloat(l); }
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+
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+int16 ShortNoSwap (int16 l) { return l; }
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+int32 LongNoSwap (int32 l) { return l; }
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+float FloatNoSwap (float f) { return f; }
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+
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+int16 ShortSwap (int16 s)
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+{
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+ union {
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+ byte b[2];
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+ int16 s;
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+ } in, out;
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+
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+ in.s = s;
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+
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+ out.b[0] = in.b[1];
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+ out.b[1] = in.b[0];
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+
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+ return out.s;
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+}
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+
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+int32 LongSwap (int32 l)
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+{
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+ union {
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+ byte b[4];
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+ int l;
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+ } in, out;
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+
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+ in.l = l;
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+
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+ out.b[0] = in.b[3];
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+ out.b[1] = in.b[2];
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+ out.b[2] = in.b[1];
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+ out.b[3] = in.b[0];
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+
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+ return out.l;
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+}
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+
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+float FloatSwap (float f)
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+{
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+ union {
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+ byte b[4];
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+ float f;
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+ } in, out;
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+
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+ in.f = f;
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+
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+ out.b[0] = in.b[3];
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+ out.b[1] = in.b[2];
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+ out.b[2] = in.b[1];
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+ out.b[3] = in.b[0];
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+
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+ return out.f;
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+}
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+
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+/*
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+ * Swap_Init
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+ * Set the byte swapping variables in a portable manner.
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+ */
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+void Swap_Init (void)
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+{
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+ byte swaptest[2] = {1, 0};
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+
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+ if (*(int16 *)swaptest == 1) {
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+ bigendien = qFalse;
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+ _LittleShort = ShortNoSwap;
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+ _LittleLong = LongNoSwap;
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+ _LittleFloat = FloatNoSwap;
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+ _BigShort = ShortSwap;
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+ _BigLong = LongSwap;
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+ _BigFloat = FloatSwap;
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+ } else {
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+ bigendien = qTrue;
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+ _LittleShort = ShortSwap;
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+ _LittleLong = LongSwap;
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+ _LittleFloat = FloatSwap;
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+ _BigShort = ShortNoSwap;
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+ _BigLong = LongNoSwap;
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+ _BigFloat = FloatNoSwap;
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+ }
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+}
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