58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/*
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Copyright (c) Microsoft Corporation
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All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
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compliance with the License. You may obtain a copy of the License
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at http://www.apache.org/licenses/LICENSE-2.0
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THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER
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EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OR CONDITIONS OF
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TITLE, FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABLITY OR NON-INFRINGEMENT.
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See the Apache Version 2.0 License for specific language governing permissions and
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limitations under the License.
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*/
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/* (c) Microsoft Corporation. All rights reserved. */
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#if !defined(_MS_FPRINT_H_)
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#define _MS_FPRINT_H_
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#if defined(__GNUC__)
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typedef unsigned long long ms_fprint_t;
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#endif
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#if defined(_MSC_VER)
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typedef unsigned __int64 ms_fprint_t;
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#pragma warning(disable:4127)
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#include <stddef.h>
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#endif
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typedef struct ms_fprint_data_s *ms_fprint_data_t;
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/* an opaque type used to keep the data structures need to compute
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fingerprints. */
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ms_fprint_data_t ms_fprint_new ();
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/* Computes the tables needed for fingerprint manipulations. */
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ms_fprint_data_t ms_fprint_new (ms_fprint_t poly);
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/* Computes the tables needed for fingerprint manipulations. */
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ms_fprint_t ms_fprint_of (ms_fprint_data_t fp,
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void *data, size_t len);
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/* if fp was generated with polynomial P, and bytes
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"data[0, ..., len-1]" contain string B,
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return the fingerprint under P of the concatenation of B.
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Strings are treated as polynomials. The low-order bit in the first
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byte is the highest degree coefficient in the polynomial.*/
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void ms_fprint_destroy (ms_fprint_data_t fp);
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/* discard the data associated with "fp" */
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#endif
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