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9b94218c63
* origin/topic/gregor/fix-val-64bit: Fixing endianess error in XDR when data is not 4-byte aligned. Fix for Val constructor with new int64 typedefs. New fix for OS X 10.5 compile error wrt llabs() Revert "Fix for OS X 10.5 compile error wrt llabs()"
88 lines
1.6 KiB
C++
88 lines
1.6 KiB
C++
// $Id: XDR.cc 6219 2008-10-01 05:39:07Z vern $
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//
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// See the file "COPYING" in the main distribution directory for copyright.
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#include "config.h"
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#include "XDR.h"
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uint32 extract_XDR_uint32(const u_char*& buf, int& len)
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{
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if ( ! buf )
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return 0;
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if ( len < 4 )
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{
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buf = 0;
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return 0;
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}
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// Takes care of alignment and endianess differences.
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uint32 bits32 = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
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buf += 4;
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len -= 4;
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return bits32;
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}
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double extract_XDR_uint64_as_double(const u_char*& buf, int& len)
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{
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if ( ! buf || len < 8 )
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{
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buf = 0;
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return 0.0;
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}
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uint32 uhi = extract_XDR_uint32(buf, len);
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uint32 ulo = extract_XDR_uint32(buf, len);
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return double(uhi) * 4294967296.0 + double(ulo);
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}
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double extract_XDR_time(const u_char*& buf, int& len)
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{
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if ( ! buf || len < 8 )
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{
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buf = 0;
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return 0.0;
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}
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uint32 uhi = extract_XDR_uint32(buf, len);
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uint32 ulo = extract_XDR_uint32(buf, len);
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return double(uhi) + double(ulo) / 1e9;
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}
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const u_char* extract_XDR_opaque(const u_char*& buf, int& len, int& n, int max_len)
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{
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n = int(extract_XDR_uint32(buf, len));
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if ( ! buf )
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return 0;
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if ( n < 0 || n > len || n > max_len )
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{ // ### Should really flag this as a different sort of error.
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buf = 0;
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return 0;
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}
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int n4 = ((n + 3) >> 2) << 2; // n rounded up to next multiple of 4
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len -= n4;
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const u_char* opaque = buf;
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buf += n4;
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return opaque;
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}
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uint32 skip_XDR_opaque_auth(const u_char*& buf, int& len)
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{
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uint32 auth_flavor = extract_XDR_uint32(buf, len);
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if ( ! buf )
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return 0;
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int n;
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(void) extract_XDR_opaque(buf, len, n, 400);
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return auth_flavor;
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}
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