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comparison mupdf-source/thirdparty/tesseract/src/training/unicharset/fileio.h @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /**********************************************************************
2 * File: fileio.h
3 * Description: File I/O utilities.
4 * Author: Samuel Charron
5 *
6 * (C) Copyright 2013, Google Inc.
7 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
8 * use this file except in compliance with the License. You may obtain a copy
9 * of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required
10 * by applicable law or agreed to in writing, software distributed under the
11 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
12 * OF ANY KIND, either express or implied. See the License for the specific
13 * language governing permissions and limitations under the License.
14 *
15 **********************************************************************/
16 #ifndef TESSERACT_TRAINING_FILEIO_H_
17 #define TESSERACT_TRAINING_FILEIO_H_
18
19 #include "export.h"
20 #include "helpers.h" // for split
21 #include "serialis.h" // for LoadDataFromFile
22
23 #include <tesseract/export.h>
24
25 #include <cstddef>
26 #include <cstdio>
27 #include <string>
28
29 namespace tesseract {
30
31 // Reads a file as a vector of string.
32 inline bool LoadFileLinesToStrings(const char *filename, std::vector<std::string> *lines) {
33 std::vector<char> data;
34 if (!LoadDataFromFile(filename, &data)) {
35 return false;
36 }
37 // TODO: optimize.
38 std::string lines_str(&data[0], data.size());
39 *lines = split(lines_str, '\n');
40 return true;
41 }
42
43 // A class to manipulate FILE*s.
44 class TESS_UNICHARSET_TRAINING_API File {
45 public:
46 // Try to open the file 'filename' in mode 'mode'.
47 // Stop the program if it cannot open it.
48 static FILE *OpenOrDie(const std::string &filename, const std::string &mode);
49 static FILE *Open(const std::string &filename, const std::string &mode);
50
51 // Try to open the file 'filename' and to write 'str' in it.
52 // Stop the program if it fails.
53 static void WriteStringToFileOrDie(const std::string &str, const std::string &filename);
54
55 // Return true if the file 'filename' is readable.
56 static bool Readable(const std::string &filename);
57
58 static bool ReadFileToString(const std::string &filename, std::string *out);
59
60 // Helper methods
61
62 // Concatenate file paths removing any extra intervening '/' symbols.
63 static std::string JoinPath(const std::string &prefix, const std::string &suffix);
64 // Delete a filename or all filenames matching a glob pattern.
65 static bool Delete(const char *pathname);
66 static bool DeleteMatchingFiles(const char *pattern);
67 };
68
69 // A class to manipulate Files for reading.
70 class TESS_UNICHARSET_TRAINING_API InputBuffer {
71 public:
72 explicit InputBuffer(FILE *stream);
73 // 'size' is ignored.
74 InputBuffer(FILE *stream, size_t size);
75
76 ~InputBuffer();
77
78 // Read data until end-of-file.
79 // The data is stored in '*out'.
80 // Return false if an error occurs, true otherwise.
81 bool Read(std::string *out);
82
83 // Close the FILE* used by InputBuffer.
84 // Return false if an error occurs, true otherwise.
85 bool CloseFile();
86
87 private:
88 FILE *stream_;
89 };
90
91 // A class to manipulate Files for writing.
92 class TESS_UNICHARSET_TRAINING_API OutputBuffer {
93 public:
94 explicit OutputBuffer(FILE *stream);
95 // 'size' is ignored.
96 OutputBuffer(FILE *stream, size_t size);
97
98 ~OutputBuffer();
99
100 // Write string 'str' to the open FILE*.
101 void WriteString(const std::string &str);
102
103 // Close the FILE* used by InputBuffer.
104 // Return false if an error occurs, true otherwise.
105 bool CloseFile();
106
107 private:
108 FILE *stream_;
109 };
110
111 } // namespace tesseract
112 #endif // TESSERACT_TRAINING_FILEIO_H_