src/physfs_byteorder.c
changeset 972 254427fc42ab
parent 953 ef9df9d27596
child 1016 957c97389257
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/physfs_byteorder.c	Fri Mar 27 15:10:42 2009 -0400
@@ -0,0 +1,312 @@
+/**
+ * PhysicsFS; a portable, flexible file i/o abstraction.
+ *
+ * Documentation is in physfs.h. It's verbose, honest.  :)
+ *
+ * Please see the file LICENSE.txt in the source's root directory.
+ *
+ *  This file written by Ryan C. Gordon.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define __PHYSICSFS_INTERNAL__
+#include "physfs_internal.h"
+
+#if (defined macintosh) && !(defined __MWERKS__)
+#define __inline__
+#endif
+
+#if (defined _MSC_VER)
+#define __inline__ __inline
+#endif
+
+#ifndef PHYSFS_Swap16
+static __inline__ PHYSFS_uint16 PHYSFS_Swap16(PHYSFS_uint16 D)
+{
+    return((D<<8)|(D>>8));
+}
+#endif
+#ifndef PHYSFS_Swap32
+static __inline__ PHYSFS_uint32 PHYSFS_Swap32(PHYSFS_uint32 D)
+{
+    return((D<<24)|((D<<8)&0x00FF0000)|((D>>8)&0x0000FF00)|(D>>24));
+}
+#endif
+#ifndef PHYSFS_NO_64BIT_SUPPORT
+#ifndef PHYSFS_Swap64
+static __inline__ PHYSFS_uint64 PHYSFS_Swap64(PHYSFS_uint64 val) {
+    PHYSFS_uint32 hi, lo;
+
+    /* Separate into high and low 32-bit values and swap them */
+    lo = (PHYSFS_uint32)(val&0xFFFFFFFF);
+    val >>= 32;
+    hi = (PHYSFS_uint32)(val&0xFFFFFFFF);
+    val = PHYSFS_Swap32(lo);
+    val <<= 32;
+    val |= PHYSFS_Swap32(hi);
+    return(val);
+}
+#endif
+#else
+#ifndef PHYSFS_Swap64
+/* This is mainly to keep compilers from complaining in PHYSFS code.
+   If there is no real 64-bit datatype, then compilers will complain about
+   the fake 64-bit datatype that PHYSFS provides when it compiles user code.
+*/
+#define PHYSFS_Swap64(X)    (X)
+#endif
+#endif /* PHYSFS_NO_64BIT_SUPPORT */
+
+
+/* Byteswap item from the specified endianness to the native endianness */
+#if PHYSFS_BYTEORDER == PHYSFS_LIL_ENDIAN
+PHYSFS_uint16 PHYSFS_swapULE16(PHYSFS_uint16 x) { return(x); }
+PHYSFS_sint16 PHYSFS_swapSLE16(PHYSFS_sint16 x) { return(x); }
+PHYSFS_uint32 PHYSFS_swapULE32(PHYSFS_uint32 x) { return(x); }
+PHYSFS_sint32 PHYSFS_swapSLE32(PHYSFS_sint32 x) { return(x); }
+PHYSFS_uint64 PHYSFS_swapULE64(PHYSFS_uint64 x) { return(x); }
+PHYSFS_sint64 PHYSFS_swapSLE64(PHYSFS_sint64 x) { return(x); }
+
+PHYSFS_uint16 PHYSFS_swapUBE16(PHYSFS_uint16 x) { return(PHYSFS_Swap16(x)); }
+PHYSFS_sint16 PHYSFS_swapSBE16(PHYSFS_sint16 x) { return(PHYSFS_Swap16(x)); }
+PHYSFS_uint32 PHYSFS_swapUBE32(PHYSFS_uint32 x) { return(PHYSFS_Swap32(x)); }
+PHYSFS_sint32 PHYSFS_swapSBE32(PHYSFS_sint32 x) { return(PHYSFS_Swap32(x)); }
+PHYSFS_uint64 PHYSFS_swapUBE64(PHYSFS_uint64 x) { return(PHYSFS_Swap64(x)); }
+PHYSFS_sint64 PHYSFS_swapSBE64(PHYSFS_sint64 x) { return(PHYSFS_Swap64(x)); }
+#else
+PHYSFS_uint16 PHYSFS_swapULE16(PHYSFS_uint16 x) { return(PHYSFS_Swap16(x)); }
+PHYSFS_sint16 PHYSFS_swapSLE16(PHYSFS_sint16 x) { return(PHYSFS_Swap16(x)); }
+PHYSFS_uint32 PHYSFS_swapULE32(PHYSFS_uint32 x) { return(PHYSFS_Swap32(x)); }
+PHYSFS_sint32 PHYSFS_swapSLE32(PHYSFS_sint32 x) { return(PHYSFS_Swap32(x)); }
+PHYSFS_uint64 PHYSFS_swapULE64(PHYSFS_uint64 x) { return(PHYSFS_Swap64(x)); }
+PHYSFS_sint64 PHYSFS_swapSLE64(PHYSFS_sint64 x) { return(PHYSFS_Swap64(x)); }
+
+PHYSFS_uint16 PHYSFS_swapUBE16(PHYSFS_uint16 x) { return(x); }
+PHYSFS_sint16 PHYSFS_swapSBE16(PHYSFS_sint16 x) { return(x); }
+PHYSFS_uint32 PHYSFS_swapUBE32(PHYSFS_uint32 x) { return(x); }
+PHYSFS_sint32 PHYSFS_swapSBE32(PHYSFS_sint32 x) { return(x); }
+PHYSFS_uint64 PHYSFS_swapUBE64(PHYSFS_uint64 x) { return(x); }
+PHYSFS_sint64 PHYSFS_swapSBE64(PHYSFS_sint64 x) { return(x); }
+#endif
+
+
+int PHYSFS_readSLE16(PHYSFS_File *file, PHYSFS_sint16 *val)
+{
+    PHYSFS_sint16 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapSLE16(in);
+    return(1);
+} /* PHYSFS_readSLE16 */
+
+
+int PHYSFS_readULE16(PHYSFS_File *file, PHYSFS_uint16 *val)
+{
+    PHYSFS_uint16 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapULE16(in);
+    return(1);
+} /* PHYSFS_readULE16 */
+
+
+int PHYSFS_readSBE16(PHYSFS_File *file, PHYSFS_sint16 *val)
+{
+    PHYSFS_sint16 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapSBE16(in);
+    return(1);
+} /* PHYSFS_readSBE16 */
+
+
+int PHYSFS_readUBE16(PHYSFS_File *file, PHYSFS_uint16 *val)
+{
+    PHYSFS_uint16 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapUBE16(in);
+    return(1);
+} /* PHYSFS_readUBE16 */
+
+
+int PHYSFS_readSLE32(PHYSFS_File *file, PHYSFS_sint32 *val)
+{
+    PHYSFS_sint32 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapSLE32(in);
+    return(1);
+} /* PHYSFS_readSLE32 */
+
+
+int PHYSFS_readULE32(PHYSFS_File *file, PHYSFS_uint32 *val)
+{
+    PHYSFS_uint32 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapULE32(in);
+    return(1);
+} /* PHYSFS_readULE32 */
+
+
+int PHYSFS_readSBE32(PHYSFS_File *file, PHYSFS_sint32 *val)
+{
+    PHYSFS_sint32 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapSBE32(in);
+    return(1);
+} /* PHYSFS_readSBE32 */
+
+
+int PHYSFS_readUBE32(PHYSFS_File *file, PHYSFS_uint32 *val)
+{
+    PHYSFS_uint32 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapUBE32(in);
+    return(1);
+} /* PHYSFS_readUBE32 */
+
+
+int PHYSFS_readSLE64(PHYSFS_File *file, PHYSFS_sint64 *val)
+{
+    PHYSFS_sint64 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapSLE64(in);
+    return(1);
+} /* PHYSFS_readSLE64 */
+
+
+int PHYSFS_readULE64(PHYSFS_File *file, PHYSFS_uint64 *val)
+{
+    PHYSFS_uint64 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapULE64(in);
+    return(1);
+} /* PHYSFS_readULE64 */
+
+
+int PHYSFS_readSBE64(PHYSFS_File *file, PHYSFS_sint64 *val)
+{
+    PHYSFS_sint64 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapSBE64(in);
+    return(1);
+} /* PHYSFS_readSBE64 */
+
+
+int PHYSFS_readUBE64(PHYSFS_File *file, PHYSFS_uint64 *val)
+{
+    PHYSFS_uint64 in;
+    BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
+    BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
+    *val = PHYSFS_swapUBE64(in);
+    return(1);
+} /* PHYSFS_readUBE64 */
+
+
+
+int PHYSFS_writeSLE16(PHYSFS_File *file, PHYSFS_sint16 val)
+{
+    PHYSFS_sint16 out = PHYSFS_swapSLE16(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeSLE16 */
+
+
+int PHYSFS_writeULE16(PHYSFS_File *file, PHYSFS_uint16 val)
+{
+    PHYSFS_uint16 out = PHYSFS_swapULE16(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeULE16 */
+
+
+int PHYSFS_writeSBE16(PHYSFS_File *file, PHYSFS_sint16 val)
+{
+    PHYSFS_sint16 out = PHYSFS_swapSBE16(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeSBE16 */
+
+
+int PHYSFS_writeUBE16(PHYSFS_File *file, PHYSFS_uint16 val)
+{
+    PHYSFS_uint16 out = PHYSFS_swapUBE16(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeUBE16 */
+
+
+int PHYSFS_writeSLE32(PHYSFS_File *file, PHYSFS_sint32 val)
+{
+    PHYSFS_sint32 out = PHYSFS_swapSLE32(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeSLE32 */
+
+
+int PHYSFS_writeULE32(PHYSFS_File *file, PHYSFS_uint32 val)
+{
+    PHYSFS_uint32 out = PHYSFS_swapULE32(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeULE32 */
+
+
+int PHYSFS_writeSBE32(PHYSFS_File *file, PHYSFS_sint32 val)
+{
+    PHYSFS_sint32 out = PHYSFS_swapSBE32(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeSBE32 */
+
+
+int PHYSFS_writeUBE32(PHYSFS_File *file, PHYSFS_uint32 val)
+{
+    PHYSFS_uint32 out = PHYSFS_swapUBE32(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeUBE32 */
+
+
+int PHYSFS_writeSLE64(PHYSFS_File *file, PHYSFS_sint64 val)
+{
+    PHYSFS_sint64 out = PHYSFS_swapSLE64(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeSLE64 */
+
+
+int PHYSFS_writeULE64(PHYSFS_File *file, PHYSFS_uint64 val)
+{
+    PHYSFS_uint64 out = PHYSFS_swapULE64(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeULE64 */
+
+
+int PHYSFS_writeSBE64(PHYSFS_File *file, PHYSFS_sint64 val)
+{
+    PHYSFS_sint64 out = PHYSFS_swapSBE64(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeSBE64 */
+
+
+int PHYSFS_writeUBE64(PHYSFS_File *file, PHYSFS_uint64 val)
+{
+    PHYSFS_uint64 out = PHYSFS_swapUBE64(val);
+    BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
+    return(1);
+} /* PHYSFS_writeUBE64 */
+
+/* end of physfs_byteorder.c ... */
+