Panda3D

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pandaFileStreamBuf.h
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file pandaFileStreamBuf.h
10 * @author drose
11 * @date 2008-09-08
12 */
13
14#ifndef PANDAFILESTREAMBUF_H
15#define PANDAFILESTREAMBUF_H
16
17#include "dtoolbase.h"
18
19#ifdef USE_PANDAFILESTREAM
20
21#if defined(_WIN32)
22#ifndef WIN32_LEAN_AND_MEAN
23#define WIN32_LEAN_AND_MEAN 1
24#endif
25#include <windows.h>
26#endif
27
28/**
29 * The streambuf object that implements pifstream and pofstream.
30 */
31 class EXPCL_DTOOL_DTOOLUTIL PandaFileStreamBuf : public std::streambuf {
32 public:
33 PandaFileStreamBuf();
34 virtual ~PandaFileStreamBuf();
35
36 void open(const char *filename, std::ios::openmode mode);
37#ifdef _WIN32
38 void attach(const char *filename, HANDLE handle, std::ios::openmode mode);
39#else
40 void attach(const char *filename, int fd, std::ios::openmode mode);
41#endif
42
43 bool is_open() const;
44 void close();
45
46 enum NewlineMode {
47 NM_native,
48 NM_binary,
49 NM_msdos,
50 NM_unix,
51 NM_mac,
52 };
53 static NewlineMode _newline_mode;
54
55 protected:
56 virtual std::streampos seekoff(std::streamoff off, ios_seekdir dir, ios_openmode which);
57 virtual std::streampos seekpos(std::streampos pos, ios_openmode which);
58
59 virtual int overflow(int c);
60 virtual int sync();
61 virtual int underflow();
62
63 private:
64 size_t read_chars(char *start, size_t length);
65 size_t write_chars(const char *start, size_t length);
66
67 size_t read_chars_raw(char *start, size_t length);
68 size_t write_chars_raw(const char *start, size_t length);
69
70 size_t decode_newlines(char *dest, size_t dest_length,
71 const char *source, size_t source_length);
72
73 size_t encode_newlines_msdos(char *dest, size_t dest_length,
74 const char *source, size_t source_length);
75 size_t encode_newlines_unix(char *dest, size_t dest_length,
76 const char *source, size_t source_length);
77 size_t encode_newlines_mac(char *dest, size_t dest_length,
78 const char *source, size_t source_length);
79
80 private:
81 std::string _filename;
82 bool _is_open;
83 std::ios::openmode _open_mode;
84
85 char _last_read_nl;
86
87#ifdef _WIN32
88 HANDLE _handle;
89#else
90 int _fd; // Posix file descriptor
91#endif // _WIN32
92
93 char *_buffer;
94 std::streampos _ppos;
95 std::streampos _gpos;
96};
97
98EXPCL_DTOOL_DTOOLUTIL std::ostream &
99operator << (std::ostream &out, PandaFileStreamBuf::NewlineMode newline_mode);
100
101EXPCL_DTOOL_DTOOLUTIL std::istream &
102operator >> (std::istream &in, PandaFileStreamBuf::NewlineMode &newline_mode);
103
104#endif // USE_PANDAFILESTREAM
105
106#endif
dtoolbase.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.