--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/tesseract/src/classify/intmatcher.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,124 @@
+/******************************************************************************
+ ** Filename:    intmatcher.h
+ ** Purpose:     Interface to high level generic classifier routines.
+ ** Author:      Robert Moss
+ **
+ ** (c) Copyright Hewlett-Packard Company, 1988.
+ ** Licensed under the Apache License, Version 2.0 (the "License");
+ ** you may not use this file except in compliance with the License.
+ ** You may obtain a copy of the License at
+ ** http://www.apache.org/licenses/LICENSE-2.0
+ ** Unless required by applicable law or agreed to in writing, software
+ ** distributed under the License is distributed on an "AS IS" BASIS,
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ** See the License for the specific language governing permissions and
+ ** limitations under the License.
+ ******************************************************************************/
+#ifndef INTMATCHER_H
+#define INTMATCHER_H
+
+#include "intproto.h"
+#include "params.h"
+
+namespace tesseract {
+
+// Character fragments could be present in the trained templaes
+// but turned on/off on the language-by-language basis or depending
+// on particular properties of the corpus (e.g. when we expect the
+// images to have low exposure).
+extern BOOL_VAR_H(disable_character_fragments);
+
+extern INT_VAR_H(classify_integer_matcher_multiplier);
+
+struct UnicharRating;
+
+struct CP_RESULT_STRUCT {
+  CP_RESULT_STRUCT() : Rating(0.0f), Class(0) {}
+
+  float Rating;
+  CLASS_ID Class;
+};
+
+/**----------------------------------------------------------------------------
+          Public Function Prototypes
+----------------------------------------------------------------------------**/
+
+#define SE_TABLE_BITS 9
+#define SE_TABLE_SIZE 512
+
+struct ScratchEvidence {
+  uint8_t feature_evidence_[MAX_NUM_CONFIGS];
+  int sum_feature_evidence_[MAX_NUM_CONFIGS];
+  uint8_t proto_evidence_[MAX_NUM_PROTOS][MAX_PROTO_INDEX];
+
+  void Clear(const INT_CLASS_STRUCT *class_template);
+  void ClearFeatureEvidence(const INT_CLASS_STRUCT *class_template);
+  void NormalizeSums(INT_CLASS_STRUCT *ClassTemplate, int16_t NumFeatures);
+  void UpdateSumOfProtoEvidences(INT_CLASS_STRUCT *ClassTemplate, BIT_VECTOR ConfigMask);
+};
+
+class IntegerMatcher {
+public:
+  // Integer Matcher Theta Fudge (0-255).
+  static const int kIntThetaFudge = 128;
+  // Bits in Similarity to Evidence Lookup (8-9).
+  static const int kEvidenceTableBits = 9;
+  // Integer Evidence Truncation Bits (8-14).
+  static const int kIntEvidenceTruncBits = 14;
+  // Similarity to Evidence Table Exponential Multiplier.
+  static const float kSEExponentialMultiplier;
+  // Center of Similarity Curve.
+  static const float kSimilarityCenter;
+
+  IntegerMatcher(tesseract::IntParam *classify_debug_level);
+
+  void Match(INT_CLASS_STRUCT *ClassTemplate, BIT_VECTOR ProtoMask, BIT_VECTOR ConfigMask,
+             int16_t NumFeatures, const INT_FEATURE_STRUCT *Features,
+             tesseract::UnicharRating *Result, int AdaptFeatureThreshold, int Debug,
+             bool SeparateDebugWindows);
+
+  // Applies the CN normalization factor to the given rating and returns
+  // the modified rating.
+  float ApplyCNCorrection(float rating, int blob_length, int normalization_factor,
+                          int matcher_multiplier);
+
+  int FindGoodProtos(INT_CLASS_STRUCT *ClassTemplate, BIT_VECTOR ProtoMask, BIT_VECTOR ConfigMask,
+                     int16_t NumFeatures, INT_FEATURE_ARRAY Features, PROTO_ID *ProtoArray,
+                     int AdaptProtoThreshold, int Debug);
+
+  int FindBadFeatures(INT_CLASS_STRUCT *ClassTemplate, BIT_VECTOR ProtoMask, BIT_VECTOR ConfigMask,
+                      int16_t NumFeatures, INT_FEATURE_ARRAY Features, FEATURE_ID *FeatureArray,
+                      int AdaptFeatureThreshold, int Debug);
+
+private:
+  int UpdateTablesForFeature(INT_CLASS_STRUCT *ClassTemplate, BIT_VECTOR ProtoMask, BIT_VECTOR ConfigMask,
+                             int FeatureNum, const INT_FEATURE_STRUCT *Feature,
+                             ScratchEvidence *evidence, int Debug);
+
+  int FindBestMatch(INT_CLASS_STRUCT *ClassTemplate, const ScratchEvidence &tables,
+                    tesseract::UnicharRating *Result);
+
+#ifndef GRAPHICS_DISABLED
+  void DebugFeatureProtoError(INT_CLASS_STRUCT *ClassTemplate, BIT_VECTOR ProtoMask, BIT_VECTOR ConfigMask,
+                              const ScratchEvidence &tables, int16_t NumFeatures, int Debug);
+
+  void DisplayProtoDebugInfo(INT_CLASS_STRUCT *ClassTemplate, BIT_VECTOR ConfigMask,
+                             const ScratchEvidence &tables, bool SeparateDebugWindows);
+
+  void DisplayFeatureDebugInfo(INT_CLASS_STRUCT *ClassTemplate, BIT_VECTOR ProtoMask, BIT_VECTOR ConfigMask,
+                               int16_t NumFeatures, const INT_FEATURE_STRUCT *Features,
+                               int AdaptFeatureThreshold, int Debug, bool SeparateDebugWindows);
+#endif
+
+private:
+  tesseract::IntParam *classify_debug_level_;
+  uint8_t similarity_evidence_table_[SE_TABLE_SIZE];
+  uint32_t evidence_table_mask_;
+  uint32_t mult_trunc_shift_bits_;
+  uint32_t table_trunc_shift_bits_;
+  uint32_t evidence_mult_mask_;
+};
+
+} // namespace tesseract
+
+#endif