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https://github.com/tesseract-ocr/tesseract.git
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106 lines
3.5 KiB
C++
106 lines
3.5 KiB
C++
/**********************************************************************
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* File: mainblk.cpp (Formerly main.c)
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* Description: Function to call from main() to setup.
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* Author: Ray Smith
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* Created: Tue Oct 22 11:09:40 BST 1991
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*
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* (C) Copyright 1991, Hewlett-Packard Ltd.
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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** http://www.apache.org/licenses/LICENSE-2.0
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*
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**********************************************************************/
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#include "fileerr.h"
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#ifdef __UNIX__
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#include <unistd.h>
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#include <signal.h>
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#else
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#include <io.h>
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#endif
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#include <stdlib.h>
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#include "ccutil.h"
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#define VARDIR "configs/" /**< variables files */
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#define EXTERN
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const ERRCODE NO_PATH =
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"Warning:explicit path for executable will not be used for configs";
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static const ERRCODE USAGE = "Usage";
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namespace tesseract {
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/**********************************************************************
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* main_setup
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*
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* Main for mithras demo program. Read the arguments and set up globals.
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**********************************************************************/
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/**
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* @brief CCUtil::main_setup - set location of tessdata and name of image
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*
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* @param argv0 - paths to the directory with language files and config files.
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* An actual value of argv0 is used if not nullptr, otherwise TESSDATA_PREFIX is
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* used if not nullptr, next try to use compiled in -DTESSDATA_PREFIX. If previous
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* is not successful - use current directory.
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* @param basename - name of image
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*/
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void CCUtil::main_setup(const char *argv0, const char *basename) {
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imagebasename = basename; /**< name of image */
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char *tessdata_prefix = getenv("TESSDATA_PREFIX");
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if (argv0 != nullptr && *argv0 != '\0') {
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/* Use tessdata prefix from the command line. */
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datadir = argv0;
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} else if (tessdata_prefix) {
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/* Use tessdata prefix from the environment. */
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datadir = tessdata_prefix;
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#if defined(_WIN32)
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} else if (datadir == nullptr || _access(datadir.string(), 0) != 0) {
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/* Look for tessdata in directory of executable. */
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char drive[_MAX_DRIVE];
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char dir[_MAX_DIR];
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char path[_MAX_PATH];
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DWORD length = GetModuleFileName(nullptr, path, sizeof(path));
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if (length > 0 && length < sizeof(path)) {
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errno_t result = _splitpath_s(path, drive, sizeof(drive),
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dir, sizeof(dir), nullptr, 0, nullptr, 0);
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if (result == ERANGE) {
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tprintf("Error: Path too long: %s\n", path);
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}
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datadir = drive;
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datadir += dir;
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datadir += "/tessdata";
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}
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#endif /* _WIN32 */
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#if defined(TESSDATA_PREFIX)
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} else {
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/* Use tessdata prefix which was compiled in. */
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#define _STR(a) #a
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#define _XSTR(a) _STR(a)
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datadir = _XSTR(TESSDATA_PREFIX) "/tessdata";
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#undef _XSTR
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#undef _STR
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#endif
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}
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// datadir may still be empty:
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if (datadir.length() == 0) {
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datadir = "./";
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}
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// check for missing directory separator
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const char *lastchar = datadir.string();
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lastchar += datadir.length() - 1;
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if ((strcmp(lastchar, "/") != 0) && (strcmp(lastchar, "\\") != 0))
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datadir += "/";
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}
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} // namespace tesseract
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