From 835e373b3eeaabcd0621ed6798ab500f37982fae Mon Sep 17 00:00:00 2001
From: Calvin Morrison <calvin@pobox.com>
Date: Wed, 5 Apr 2023 14:13:39 -0400
Subject: xpdf-no-select-disable

---
 xpdf/CharCodeToUnicode.h | 131 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 xpdf/CharCodeToUnicode.h

(limited to 'xpdf/CharCodeToUnicode.h')

diff --git a/xpdf/CharCodeToUnicode.h b/xpdf/CharCodeToUnicode.h
new file mode 100644
index 0000000..be90251
--- /dev/null
+++ b/xpdf/CharCodeToUnicode.h
@@ -0,0 +1,131 @@
+//========================================================================
+//
+// CharCodeToUnicode.h
+//
+// Mapping from character codes to Unicode.
+//
+// Copyright 2001-2003 Glyph & Cog, LLC
+//
+//========================================================================
+
+#ifndef CHARCODETOUNICODE_H
+#define CHARCODETOUNICODE_H
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma interface
+#endif
+
+#include "CharTypes.h"
+
+#if MULTITHREADED
+#include "GMutex.h"
+#endif
+
+struct CharCodeToUnicodeString;
+
+//------------------------------------------------------------------------
+
+class CharCodeToUnicode {
+public:
+
+  // Create an identity mapping (Unicode = CharCode).
+  static CharCodeToUnicode *makeIdentityMapping();
+
+  // Read the CID-to-Unicode mapping for <collection> from the file
+  // specified by <fileName>.  Sets the initial reference count to 1.
+  // Returns NULL on failure.
+  static CharCodeToUnicode *parseCIDToUnicode(GString *fileName,
+					      GString *collection);
+
+  // Create a Unicode-to-Unicode mapping from the file specified by
+  // <fileName>.  Sets the initial reference count to 1.  Returns NULL
+  // on failure.
+  static CharCodeToUnicode *parseUnicodeToUnicode(GString *fileName);
+
+  // Create the CharCode-to-Unicode mapping for an 8-bit font.
+  // <toUnicode> is an array of 256 Unicode indexes.  Sets the initial
+  // reference count to 1.
+  static CharCodeToUnicode *make8BitToUnicode(Unicode *toUnicode);
+
+  // Create the CharCode-to-Unicode mapping for a 16-bit font.
+  // <toUnicode> is an array of 65536 Unicode indexes.  Sets the
+  // initial reference count to 1.
+  static CharCodeToUnicode *make16BitToUnicode(Unicode *toUnicode);
+
+  // Parse a ToUnicode CMap for an 8- or 16-bit font.
+  static CharCodeToUnicode *parseCMap(GString *buf, int nBits);
+
+  // Parse a ToUnicode CMap for an 8- or 16-bit font, merging it into
+  // <this>.
+  void mergeCMap(GString *buf, int nBits);
+
+  ~CharCodeToUnicode();
+
+  void incRefCnt();
+  void decRefCnt();
+
+  // Return true if this mapping matches the specified <tagA>.
+  GBool match(GString *tagA);
+
+  // Set the mapping for <c>.
+  void setMapping(CharCode c, Unicode *u, int len);
+
+  // Map a CharCode to Unicode.
+  int mapToUnicode(CharCode c, Unicode *u, int size);
+
+  // Return the mapping's length, i.e., one more than the max char
+  // code supported by the mapping.
+  CharCode getLength() { return mapLen; }
+
+  GBool isIdentity() { return !map; }
+
+private:
+
+  GBool parseCMap1(int (*getCharFunc)(void *), void *data, int nBits);
+  void addMapping(CharCode code, char *uStr, int n, int offset);
+  int parseUTF16String(char *uStr, int n, Unicode *uOut);
+  void addMappingInt(CharCode code, Unicode u);
+  CharCodeToUnicode();
+  CharCodeToUnicode(GString *tagA);
+  CharCodeToUnicode(GString *tagA, Unicode *mapA,
+		    CharCode mapLenA, GBool copyMap,
+		    CharCodeToUnicodeString *sMapA,
+		    int sMapLenA, int sMapSizeA);
+
+  GString *tag;
+  Unicode *map;
+  CharCode mapLen;
+  CharCodeToUnicodeString *sMap;
+  int sMapLen, sMapSize;
+#if MULTITHREADED
+  GAtomicCounter refCnt;
+#else
+  int refCnt;
+#endif
+};
+
+//------------------------------------------------------------------------
+
+class CharCodeToUnicodeCache {
+public:
+
+  CharCodeToUnicodeCache(int sizeA);
+  ~CharCodeToUnicodeCache();
+
+  // Get the CharCodeToUnicode object for <tag>.  Increments its
+  // reference count; there will be one reference for the cache plus
+  // one for the caller of this function.  Returns NULL on failure.
+  CharCodeToUnicode *getCharCodeToUnicode(GString *tag);
+
+  // Insert <ctu> into the cache, in the most-recently-used position.
+  void add(CharCodeToUnicode *ctu);
+
+private:
+
+  CharCodeToUnicode **cache;
+  int size;
+};
+
+#endif
-- 
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