Mercurial > octave
annotate libinterp/corefcn/c-file-ptr-stream.h @ 17744:d63878346099
maint: Update copyright notices for release.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Wed, 23 Oct 2013 22:09:27 -0400 |
| parents | 68fc671a9339 |
| children | 175b392e91fe |
| rev | line source |
|---|---|
| 3628 | 1 /* |
| 2 | |
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17744
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3 Copyright (C) 2000-2013 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 |
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77 int seek (off_t offset, int origin); |
| 4797 | 78 |
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79 off_t tell (void); |
| 4797 | 80 |
| 4888 | 81 void clear (void) { if (f) clearerr (f); } |
| 82 | |
| 10411 | 83 static int file_close (FILE *f); |
| 3951 | 84 |
| 3644 | 85 protected: |
| 86 | |
| 87 FILE *f; | |
| 3716 | 88 |
| 89 close_fcn cf; | |
| 3775 | 90 |
| 91 private: | |
| 92 | |
| 4310 | 93 int_type underflow_common (bool); |
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94 |
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95 // No copying! |
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96 |
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97 c_file_ptr_buf (const c_file_ptr_buf&); |
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98 |
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99 c_file_ptr_buf& operator = (const c_file_ptr_buf&); |
| 3628 | 100 }; |
| 101 | |
| 5775 | 102 // FIXME -- the following three classes could probably share |
| 5325 | 103 // some code... |
| 104 | |
| 105 template <typename STREAM_T, typename FILE_T, typename BUF_T> | |
| 3628 | 106 class |
| 5325 | 107 c_file_ptr_stream : public STREAM_T |
| 3628 | 108 { |
| 3644 | 109 public: |
| 110 | |
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111 c_file_ptr_stream (FILE_T f, typename BUF_T::close_fcn cf = BUF_T::file_close) |
| 5884 | 112 : STREAM_T (0), buf (new BUF_T (f, cf)) { STREAM_T::init (buf); } |
| 3644 | 113 |
| 5325 | 114 ~c_file_ptr_stream (void) { delete buf; buf = 0; } |
| 3644 | 115 |
| 5325 | 116 BUF_T *rdbuf (void) { return buf; } |
| 3644 | 117 |
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118 void stream_close (void) { if (buf) buf->buf_close (); } |
| 3652 | 119 |
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120 int seek (off_t offset, int origin) |
| 4797 | 121 { return buf ? buf->seek (offset, origin) : -1; } |
| 122 | |
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123 off_t tell (void) { return buf ? buf->tell () : -1; } |
| 4797 | 124 |
| 5325 | 125 void clear (void) { if (buf) buf->clear (); STREAM_T::clear (); } |
| 4888 | 126 |
| 3628 | 127 private: |
| 128 | |
| 5325 | 129 BUF_T *buf; |
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130 |
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131 // No copying! |
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132 |
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133 c_file_ptr_stream (const c_file_ptr_stream&); |
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134 |
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135 c_file_ptr_stream& operator = (const c_file_ptr_stream&); |
| 3628 | 136 }; |
| 137 | |
| 5325 | 138 typedef c_file_ptr_stream<std::istream, FILE *, c_file_ptr_buf> i_c_file_ptr_stream; |
| 139 typedef c_file_ptr_stream<std::ostream, FILE *, c_file_ptr_buf> o_c_file_ptr_stream; | |
| 140 typedef c_file_ptr_stream<std::iostream, FILE *, c_file_ptr_buf> io_c_file_ptr_stream; | |
| 141 | |
| 142 #ifdef HAVE_ZLIB | |
| 143 | |
| 144 #ifdef HAVE_ZLIB_H | |
| 145 #include <zlib.h> | |
| 146 #endif | |
| 147 | |
| 3628 | 148 class |
| 5325 | 149 c_zfile_ptr_buf : public std::streambuf |
| 3628 | 150 { |
| 3644 | 151 public: |
| 152 | |
| 5325 | 153 #if !defined (CXX_ISO_COMPLIANT_LIBRARY) |
| 154 typedef int int_type; | |
| 155 #else | |
| 156 typedef std::streambuf::int_type int_type; | |
| 157 #endif | |
| 158 | |
| 159 typedef int (*close_fcn) (gzFile); | |
| 160 | |
| 161 gzFile stdiofile (void) { return f; } | |
| 162 | |
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163 c_zfile_ptr_buf (gzFile f_arg, close_fcn cf_arg = file_close) |
| 5325 | 164 : std::streambuf (), f (f_arg), cf (cf_arg) |
| 165 { } | |
| 166 | |
| 167 ~c_zfile_ptr_buf (void); | |
| 168 | |
| 169 int_type overflow (int_type); | |
| 170 | |
| 171 int_type underflow (void) { return underflow_common (false); } | |
| 3644 | 172 |
| 5325 | 173 int_type uflow (void) { return underflow_common (true); } |
| 174 | |
| 175 int_type pbackfail (int_type); | |
| 176 | |
| 177 std::streamsize xsputn (const char*, std::streamsize); | |
| 178 | |
| 179 std::streamsize xsgetn (char *, std::streamsize); | |
| 3644 | 180 |
| 5325 | 181 std::streampos seekoff (std::streamoff, std::ios::seekdir, |
| 10313 | 182 std::ios::openmode = std::ios::in | std::ios::out); |
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183 |
| 5325 | 184 std::streampos seekpos (std::streampos, |
| 10313 | 185 std::ios::openmode = std::ios::in | std::ios::out); |
| 3644 | 186 |
| 5325 | 187 int sync (void); |
| 188 | |
| 189 int flush (void); | |
| 190 | |
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191 int buf_close (void); |
| 5325 | 192 |
| 193 int file_number () const { return -1; } | |
| 4326 | 194 |
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195 int seek (off_t offset, int origin) |
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196 { return f ? gzseek (f, offset, origin) >= 0 : -1; } |
| 5325 | 197 |
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198 off_t tell (void) { return f ? gztell (f) : -1; } |
| 5325 | 199 |
| 200 void clear (void) { if (f) gzclearerr (f); } | |
| 4797 | 201 |
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202 static int file_close (gzFile f) { return ::gzclose (f); } |
| 5325 | 203 |
| 204 protected: | |
| 4797 | 205 |
| 5325 | 206 gzFile f; |
| 207 | |
| 208 close_fcn cf; | |
| 4888 | 209 |
| 4326 | 210 private: |
| 211 | |
| 5325 | 212 int_type underflow_common (bool); |
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213 |
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214 // No copying! |
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215 |
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216 c_zfile_ptr_buf (const c_zfile_ptr_buf&); |
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217 |
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218 c_zfile_ptr_buf& operator = (const c_zfile_ptr_buf&); |
| 4326 | 219 }; |
| 220 | |
| 5325 | 221 typedef c_file_ptr_stream<std::istream, gzFile, c_zfile_ptr_buf> i_c_zfile_ptr_stream; |
| 222 typedef c_file_ptr_stream<std::ostream, gzFile, c_zfile_ptr_buf> o_c_zfile_ptr_stream; | |
| 223 typedef c_file_ptr_stream<std::iostream, gzFile, c_zfile_ptr_buf> io_c_zfile_ptr_stream; | |
| 4326 | 224 |
| 5325 | 225 #endif |
| 3628 | 226 |
| 227 #endif |