[Courgette] Add third party-library: libdivsufsort.

courgette/third_party/divsufsort/divsufsort.h

Index: courgette/third_party/divsufsort/divsufsort.h
diff --git a/courgette/third_party/divsufsort/divsufsort.h b/courgette/third_party/divsufsort/divsufsort.h
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+++ b/courgette/third_party/divsufsort/divsufsort.h
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+// Copyright (c) 2003-2008 Yuta Mori All Rights Reserved.
+//
+// For the terms under which this work may be distributed, please see
+// the adjoining file "LICENSE".
+//
+// ChangeLog:
+// 2016-07-22 - Initial commit and adaption to use PagedArray.
+//                --Samuel Huang <huangs@chromium.org>
+
+#ifndef COURGETTE_BSDIFF_THIRD_PARTY_DIVSUFSORT_H_
+#define COURGETTE_BSDIFF_THIRD_PARTY_DIVSUFSORT_H_
+
+#include <stdint.h>
+
+#include "courgette/third_party/bsdiff/paged_array.h"
+
+namespace divsuf {
+
+/*- Datatypes -*/
+typedef int32_t saint_t;
+typedef int32_t saidx_t;
+typedef uint8_t sauchar_t;
+
+#ifdef DIVSUFSORT_NO_PAGED_ARRAY
+typedef saidx_t* saidx_it;
+typedef const saidx_t* const_saidx_it;
+#else
+typedef courgette::PagedArray<saidx_t>::iterator saidx_it;
+typedef courgette::PagedArray<saidx_t>::const_iterator const_saidx_it;
+#endif
+
+/*- Prototypes -*/
+
+/**
+ * Constructs the suffix array of a given string, excluding the empty string.
+ * @param T[0..n-1] The input string.
+ * @param SA[0..n-1] The output array of suffixes.
+ * @param n The length of the given string.
+ * @return 0 if no error occurred, -1 or -2 otherwise.
+ */
+saint_t divsufsort(const sauchar_t *T, saidx_it SA, saidx_t n);
+
+/**
+ * Constructs the suffix array of a given string, including the empty string.
+ * @param T[0..n-1] The input string.
+ * @param SA[0..n] The output array of suffixes (includes empty string).
+ * @param n The length of the given string.
+ * @return 0 if no error occurred, -1 or -2 otherwise.
+ */
+saint_t divsufsort_include_empty(const sauchar_t *T, saidx_it SA, saidx_t n);
+
+}  // namespace divsuf
+
+#endif  // COURGETTE_BSDIFF_THIRD_PARTY_DIVSUFSORT_H_