Mercurial > octave-nkf
annotate src/c-file-ptr-stream.h @ 12409:2848dd7c4dd7 release-3-4-x release-3-4-0
version 3.4.0 released
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Tue, 08 Feb 2011 05:00:08 -0500 |
| parents | f4689107dd8c |
| children | f3a8d1efe2c1 |
| rev | line source |
|---|---|
| 3628 | 1 /* |
| 2 | |
| 11523 | 3 Copyright (C) 2000-2011 John W. Eaton |
| 3628 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 3628 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 3628 | 20 |
| 21 */ | |
| 22 | |
| 23 #if !defined (octave_c_file_ptr_stream_h) | |
| 24 #define octave_c_file_ptr_stream_h 1 | |
| 25 | |
| 3775 | 26 #include <cstdio> |
| 3628 | 27 |
|
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28 #include <iosfwd> |
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29 |
| 3628 | 30 class |
| 4310 | 31 c_file_ptr_buf : public std::streambuf |
| 3628 | 32 { |
| 33 public: | |
| 34 | |
| 3775 | 35 #if !defined (CXX_ISO_COMPLIANT_LIBRARY) |
| 36 typedef int int_type; | |
| 3944 | 37 #else |
| 4310 | 38 typedef std::streambuf::int_type int_type; |
| 3775 | 39 #endif |
| 40 | |
| 3716 | 41 typedef int (*close_fcn) (FILE *); |
| 42 | |
| 4797 | 43 FILE* stdiofile (void) { return f; } |
| 3628 | 44 |
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45 c_file_ptr_buf (FILE *f_arg, close_fcn cf_arg = file_close) |
| 4310 | 46 : std::streambuf (), f (f_arg), cf (cf_arg) |
| 3775 | 47 { } |
| 3628 | 48 |
| 49 ~c_file_ptr_buf (void); | |
| 50 | |
| 3775 | 51 int_type overflow (int_type); |
| 3628 | 52 |
| 4310 | 53 int_type underflow (void) { return underflow_common (false); } |
| 3628 | 54 |
| 4310 | 55 int_type uflow (void) { return underflow_common (true); } |
| 3628 | 56 |
| 3775 | 57 int_type pbackfail (int_type); |
| 3628 | 58 |
| 59 std::streamsize xsputn (const char*, std::streamsize); | |
| 60 | |
| 61 std::streamsize xsgetn (char *, std::streamsize); | |
| 62 | |
| 63 std::streampos seekoff (std::streamoff, std::ios::seekdir, | |
| 10313 | 64 std::ios::openmode = std::ios::in | std::ios::out); |
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65 |
| 3628 | 66 std::streampos seekpos (std::streampos, |
| 10313 | 67 std::ios::openmode = std::ios::in | std::ios::out); |
| 3628 | 68 |
| 69 int sync (void); | |
| 3644 | 70 |
| 3652 | 71 int flush (void); |
| 72 | |
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73 int buf_close (void); |
| 3652 | 74 |
| 4310 | 75 int file_number () const { return f ? fileno (f) : -1; } |
| 3775 | 76 |
| 4797 | 77 int seek (long offset, int origin) |
| 78 { return f ? fseek (f, offset, origin) : -1; } | |
| 79 | |
| 80 long tell (void) { return f ? ftell (f) : -1; } | |
| 81 | |
| 4888 | 82 void clear (void) { if (f) clearerr (f); } |
| 83 | |
| 10411 | 84 static int file_close (FILE *f); |
| 3951 | 85 |
| 3644 | 86 protected: |
| 87 | |
| 88 FILE *f; | |
| 3716 | 89 |
| 90 close_fcn cf; | |
| 3775 | 91 |
| 92 private: | |
| 93 | |
| 4310 | 94 int_type underflow_common (bool); |
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95 |
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96 // No copying! |
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97 |
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98 c_file_ptr_buf (const c_file_ptr_buf&); |
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99 |
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100 c_file_ptr_buf& operator = (const c_file_ptr_buf&); |
| 3628 | 101 }; |
| 102 | |
| 5775 | 103 // FIXME -- the following three classes could probably share |
| 5325 | 104 // some code... |
| 105 | |
| 106 template <typename STREAM_T, typename FILE_T, typename BUF_T> | |
| 3628 | 107 class |
| 5325 | 108 c_file_ptr_stream : public STREAM_T |
| 3628 | 109 { |
| 3644 | 110 public: |
| 111 | |
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112 c_file_ptr_stream (FILE_T f, typename BUF_T::close_fcn cf = BUF_T::file_close) |
| 5884 | 113 : STREAM_T (0), buf (new BUF_T (f, cf)) { STREAM_T::init (buf); } |
| 3644 | 114 |
| 5325 | 115 ~c_file_ptr_stream (void) { delete buf; buf = 0; } |
| 3644 | 116 |
| 5325 | 117 BUF_T *rdbuf (void) { return buf; } |
| 3644 | 118 |
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119 void stream_close (void) { if (buf) buf->buf_close (); } |
| 3652 | 120 |
| 4797 | 121 int seek (long offset, int origin) |
| 122 { return buf ? buf->seek (offset, origin) : -1; } | |
| 123 | |
| 124 long tell (void) { return buf ? buf->tell () : -1; } | |
| 125 | |
| 5325 | 126 void clear (void) { if (buf) buf->clear (); STREAM_T::clear (); } |
| 4888 | 127 |
| 3628 | 128 private: |
| 129 | |
| 5325 | 130 BUF_T *buf; |
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131 |
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132 // No copying! |
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133 |
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134 c_file_ptr_stream (const c_file_ptr_stream&); |
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135 |
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136 c_file_ptr_stream& operator = (const c_file_ptr_stream&); |
| 3628 | 137 }; |
| 138 | |
| 5325 | 139 typedef c_file_ptr_stream<std::istream, FILE *, c_file_ptr_buf> i_c_file_ptr_stream; |
| 140 typedef c_file_ptr_stream<std::ostream, FILE *, c_file_ptr_buf> o_c_file_ptr_stream; | |
| 141 typedef c_file_ptr_stream<std::iostream, FILE *, c_file_ptr_buf> io_c_file_ptr_stream; | |
| 142 | |
| 143 #ifdef HAVE_ZLIB | |
| 144 | |
| 145 #ifdef HAVE_ZLIB_H | |
| 146 #include <zlib.h> | |
| 147 #endif | |
| 148 | |
| 3628 | 149 class |
| 5325 | 150 c_zfile_ptr_buf : public std::streambuf |
| 3628 | 151 { |
| 3644 | 152 public: |
| 153 | |
| 5325 | 154 #if !defined (CXX_ISO_COMPLIANT_LIBRARY) |
| 155 typedef int int_type; | |
| 156 #else | |
| 157 typedef std::streambuf::int_type int_type; | |
| 158 #endif | |
| 159 | |
| 160 typedef int (*close_fcn) (gzFile); | |
| 161 | |
| 162 gzFile stdiofile (void) { return f; } | |
| 163 | |
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164 c_zfile_ptr_buf (gzFile f_arg, close_fcn cf_arg = file_close) |
| 5325 | 165 : std::streambuf (), f (f_arg), cf (cf_arg) |
| 166 { } | |
| 167 | |
| 168 ~c_zfile_ptr_buf (void); | |
| 169 | |
| 170 int_type overflow (int_type); | |
| 171 | |
| 172 int_type underflow (void) { return underflow_common (false); } | |
| 3644 | 173 |
| 5325 | 174 int_type uflow (void) { return underflow_common (true); } |
| 175 | |
| 176 int_type pbackfail (int_type); | |
| 177 | |
| 178 std::streamsize xsputn (const char*, std::streamsize); | |
| 179 | |
| 180 std::streamsize xsgetn (char *, std::streamsize); | |
| 3644 | 181 |
| 5325 | 182 std::streampos seekoff (std::streamoff, std::ios::seekdir, |
| 10313 | 183 std::ios::openmode = std::ios::in | std::ios::out); |
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184 |
| 5325 | 185 std::streampos seekpos (std::streampos, |
| 10313 | 186 std::ios::openmode = std::ios::in | std::ios::out); |
| 3644 | 187 |
| 5325 | 188 int sync (void); |
| 189 | |
| 190 int flush (void); | |
| 191 | |
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192 int buf_close (void); |
| 5325 | 193 |
| 194 int file_number () const { return -1; } | |
| 4326 | 195 |
| 4797 | 196 int seek (long offset, int origin) |
| 5325 | 197 { return f ? gzseek (f, offset, origin) : -1; } |
| 198 | |
| 199 long tell (void) { return f ? gztell (f) : -1; } | |
| 200 | |
| 201 void clear (void) { if (f) gzclearerr (f); } | |
| 4797 | 202 |
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203 static int file_close (gzFile f) { return ::gzclose (f); } |
| 5325 | 204 |
| 205 protected: | |
| 4797 | 206 |
| 5325 | 207 gzFile f; |
| 208 | |
| 209 close_fcn cf; | |
| 4888 | 210 |
| 4326 | 211 private: |
| 212 | |
| 5325 | 213 int_type underflow_common (bool); |
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214 |
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215 // No copying! |
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216 |
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217 c_zfile_ptr_buf (const c_zfile_ptr_buf&); |
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218 |
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219 c_zfile_ptr_buf& operator = (const c_zfile_ptr_buf&); |
| 4326 | 220 }; |
| 221 | |
| 5325 | 222 typedef c_file_ptr_stream<std::istream, gzFile, c_zfile_ptr_buf> i_c_zfile_ptr_stream; |
| 223 typedef c_file_ptr_stream<std::ostream, gzFile, c_zfile_ptr_buf> o_c_zfile_ptr_stream; | |
| 224 typedef c_file_ptr_stream<std::iostream, gzFile, c_zfile_ptr_buf> io_c_zfile_ptr_stream; | |
| 4326 | 225 |
| 5325 | 226 #endif |
| 3628 | 227 |
| 228 #endif |