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2026-08-14 04:31:05 +00:00 · 2020-04-22 12:56:21 -04:00
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+/*
+ *
+ * Copyright (c) 1998-9
+ * Dr John Maddock
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Dr John Maddock makes no representations
+ * about the suitability of this software for any purpose.
+ * It is provided "as is" without express or implied warranty.
+ *
+ */
+
+ /*
+  *   FILE     re_kmp.h
+  *   VERSION  2.12
+  *   Knuth-Morris-Pratt search.
+  */
+
+
+#ifndef __RE_KMP_H
+#define __RE_KMP_H
+
+#ifdef JM_CFG_H
+#include <jm/jm_cfg.h>
+#endif
+
+
+JM_NAMESPACE(__JM)
+
+template <class charT>
+struct kmp_info
+{
+   unsigned int size;
+   unsigned int len;
+   const charT* pstr;
+   int kmp_next[1];
+};
+
+template <class charT, class Allocator>
+void kmp_free(kmp_info<charT>* pinfo, Allocator a)
+{
+   typedef JM_MAYBE_TYPENAME REBIND_TYPE(char, Allocator) atype;
+   atype(a).deallocate((char*)pinfo, pinfo->size);
+}
+
+template <class iterator, class charT, class Trans, class Allocator>
+kmp_info<charT>* kmp_compile(iterator first, iterator last, charT, Trans translate, Allocator a
+#ifdef RE_LOCALE_CPP
+                             , const __JM_STD::locale& l
+#endif
+                             ) 
+{    
+   typedef JM_MAYBE_TYPENAME REBIND_TYPE(char, Allocator) atype;
+   int i, j, m;
+   i = 0;
+   m = 0;
+   JM_DISTANCE(first, last, m);
+   ++m;
+   unsigned int size = sizeof(kmp_info<charT>) + sizeof(int)*m + sizeof(charT)*m;
+   --m;
+   //
+   // allocate struct and fill it in:
+   //
+   kmp_info<charT>* pinfo = (kmp_info<charT>*)atype(a).allocate(size);
+   pinfo->size = size;
+   pinfo->len = m;
+   charT* p = (charT*)((char*)pinfo + sizeof(kmp_info<charT>) + sizeof(int)*(m+1));
+   pinfo->pstr = p;
+   while(first != last)
+   {
+      *p = translate(*first MAYBE_PASS_LOCALE(l));
+      ++first;
+      ++p;
+   }
+   *p = 0;
+   //
+   // finally do regular kmp compile:
+   //
+   j = pinfo->kmp_next[0] = -1;
+   while (i < m) 
+   {
+      while ((j > -1) && (pinfo->pstr[i] != pinfo->pstr[j])) 
+         j = pinfo->kmp_next[j];
+      ++i;
+      ++j;
+      if (pinfo->pstr[i] == pinfo->pstr[j]) 
+         pinfo->kmp_next[i] = pinfo->kmp_next[j];
+      else 
+         pinfo->kmp_next[i] = j;
+   }
+
+   return pinfo;
+}
+
+
+JM_END_NAMESPACE   // namespace regex
+
+#endif   // __RE_KMP_H
+
+
+
+