--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/tesseract/src/ccutil/ccutil.cpp	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,100 @@
+// Copyright 2008 Google Inc. All Rights Reserved.
+// Author: scharron@google.com (Samuel Charron)
+// 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.
+
+#include "ccutil.h"
+#include "tprintf.h"  // for tprintf
+
+#include <cstdlib>
+#include <cstring>    // for std::strrchrA
+#include <filesystem> // for std::filesystem
+
+namespace tesseract {
+
+CCUtil::CCUtil()
+    : params_()
+      , INT_INIT_MEMBER(ambigs_debug_level, 0, "Debug level for unichar ambiguities", &params_)
+      , BOOL_MEMBER(use_ambigs_for_adaption, false,
+                  "Use ambigs for deciding"
+                  " whether to adapt to a character",
+                  &params_) {}
+
+// Destructor.
+// It is defined here, so the compiler can create a single vtable
+// instead of weak vtables in every compilation unit.
+CCUtil::~CCUtil() = default;
+
+/**
+ * @brief CCUtil::main_setup - set location of tessdata and name of image
+ *
+ * @param argv0 - paths to the directory with language files and config files.
+ * An actual value of argv0 is used if not nullptr, otherwise TESSDATA_PREFIX is
+ * used if not nullptr, next try to use compiled in -DTESSDATA_PREFIX. If
+ * previous is not successful - use current directory.
+ * @param basename - name of image
+ */
+void CCUtil::main_setup(const std::string &argv0, const std::string &basename) {
+  imagebasename = basename; /**< name of image */
+
+  const char *tessdata_prefix = getenv("TESSDATA_PREFIX");
+
+  // Ignore TESSDATA_PREFIX if there is no matching filesystem entry.
+  if (tessdata_prefix != nullptr && !std::filesystem::exists(tessdata_prefix)) {
+    tprintf("Warning: TESSDATA_PREFIX %s does not exist, ignore it\n", tessdata_prefix);
+    tessdata_prefix = nullptr;
+  }
+
+  if (!argv0.empty()) {
+    /* Use tessdata prefix from the command line. */
+    datadir = argv0;
+  } else if (tessdata_prefix) {
+    /* Use tessdata prefix from the environment. */
+    datadir = tessdata_prefix;
+#if defined(_WIN32)
+  } else if (datadir.empty() || !std::filesystem::exists(datadir)) {
+    /* Look for tessdata in directory of executable. */
+    char path[_MAX_PATH];
+    DWORD length = GetModuleFileName(nullptr, path, sizeof(path));
+    if (length > 0 && length < sizeof(path)) {
+      char *separator = std::strrchr(path, '\\');
+      if (separator != nullptr) {
+        *separator = '\0';
+        std::string subdir = path;
+        subdir += "/tessdata";
+        if (std::filesystem::exists(subdir)) {
+          datadir = subdir;
+        }
+      }
+    }
+#endif /* _WIN32 */
+  }
+
+  // datadir may still be empty:
+  if (datadir.empty()) {
+#if defined(TESSDATA_PREFIX)
+    // Use tessdata prefix which was compiled in.
+    datadir = TESSDATA_PREFIX "/tessdata/";
+    // Note that some software (for example conda) patches TESSDATA_PREFIX
+    // in the binary, so it might be shorter. Recalculate its length.
+    datadir.resize(std::strlen(datadir.c_str()));
+#else
+    datadir = "./";
+#endif /* TESSDATA_PREFIX */
+  }
+
+  // check for missing directory separator
+  const char lastchar = datadir.back();
+  if (lastchar != '/' && lastchar != '\\') {
+    datadir += '/';
+  }
+}
+
+} // namespace tesseract