Mercurial > octave
annotate libinterp/corefcn/oct-stream.h @ 21477:4fc04d04dd9c
make printf and scanf format element and list objects private
* oct-stream.cc (scanf_format_elt, scanf_format_list,
printf_format_elt, printf_format_list): Move class declarations and
definitions here.
* oct-stream.h: From here.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Fri, 18 Mar 2016 13:10:19 -0400 |
| parents | 4f3e63d75f33 |
| children | 7a19c5678f91 |
| rev | line source |
|---|---|
| 2117 | 1 /* |
| 2 | |
|
19697
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3 Copyright (C) 1996-2015 John W. Eaton |
| 2117 | 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. | |
| 2117 | 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/>. | |
| 2117 | 20 |
| 21 */ | |
| 22 | |
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23 #if ! defined (octave_oct_stream_h) |
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24 #define octave_oct_stream_h 1 |
| 2117 | 25 |
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26 #include "octave-config.h" |
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27 |
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28 #include <deque> |
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29 #include <iosfwd> |
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30 #include <list> |
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31 #include <map> |
| 5765 | 32 #include <sstream> |
| 2877 | 33 #include <string> |
| 2117 | 34 |
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35 // These are only needed as arguments to private functions, so they |
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36 // are also treated as private. |
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37 |
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38 class scanf_format_elt; |
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39 class scanf_format_list; |
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40 class printf_format_elt; |
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41 class printf_format_list; |
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42 |
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43 // These only appear as reference arguments or return values. |
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44 |
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45 template <typename T> class Array; |
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46 class string_vector; |
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47 class octave_value; |
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48 class octave_value_list; |
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49 |
| 2317 | 50 #include "data-conv.h" |
| 51 #include "mach-info.h" | |
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52 #include "oct-refcount.h" |
| 2117 | 53 |
| 54 // Provide an interface for Octave streams. | |
| 55 | |
| 56 class | |
| 6109 | 57 OCTINTERP_API |
| 2117 | 58 octave_base_stream |
| 59 { | |
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60 friend class octave_stream; |
| 2117 | 61 |
| 62 public: | |
| 63 | |
| 3544 | 64 octave_base_stream (std::ios::openmode arg_md = std::ios::in|std::ios::out, |
| 10313 | 65 oct_mach_info::float_format ff |
| 66 = oct_mach_info::native_float_format ()) | |
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67 : count (0), md (arg_md), flt_fmt (ff), fail (false), open_state (true), |
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68 errmsg () |
| 3340 | 69 { } |
| 2117 | 70 |
| 71 virtual ~octave_base_stream (void) { } | |
| 72 | |
| 73 // The remaining functions are not specific to input or output only, | |
| 74 // and must be provided by the derived classes. | |
| 75 | |
| 76 // Position a stream at OFFSET relative to ORIGIN. | |
| 77 | |
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78 virtual int seek (off_t offset, int origin) = 0; |
| 2117 | 79 |
| 80 // Return current stream position. | |
| 81 | |
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82 virtual off_t tell (void) = 0; |
| 2117 | 83 |
| 3340 | 84 // Return TRUE if EOF has been reached on this stream. |
| 2117 | 85 |
| 86 virtual bool eof (void) const = 0; | |
| 87 | |
| 88 // The name of the file. | |
| 89 | |
| 3523 | 90 virtual std::string name (void) const = 0; |
| 2117 | 91 |
| 92 // If the derived class provides this function and it returns a | |
| 93 // pointer to a valid istream, scanf(), read(), getl(), and gets() | |
| 94 // will automatically work for this stream. | |
| 95 | |
| 3523 | 96 virtual std::istream *input_stream (void) { return 0; } |
| 2117 | 97 |
| 98 // If the derived class provides this function and it returns a | |
| 99 // pointer to a valid ostream, flush(), write(), and printf() will | |
| 100 // automatically work for this stream. | |
| 101 | |
| 3523 | 102 virtual std::ostream *output_stream (void) { return 0; } |
| 2117 | 103 |
| 3340 | 104 // Return TRUE if this stream is open. |
| 105 | |
| 106 bool is_open (void) const { return open_state; } | |
| 107 | |
| 3652 | 108 virtual void do_close (void) { } |
| 109 | |
| 110 void close (void) | |
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111 { |
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112 if (is_open ()) |
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113 { |
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114 open_state = false; |
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115 do_close (); |
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116 } |
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117 } |
| 3340 | 118 |
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119 virtual int file_number (void) const |
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120 { |
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121 // Kluge alert! |
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122 |
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123 if (name () == "stdin") |
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124 return 0; |
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125 else if (name () == "stdout") |
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126 return 1; |
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127 else if (name () == "stderr") |
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128 return 2; |
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129 else |
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130 return -1; |
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131 } |
| 3145 | 132 |
| 2117 | 133 bool ok (void) const { return ! fail; } |
| 134 | |
| 135 // Return current error message for this stream. | |
| 136 | |
| 3523 | 137 std::string error (bool clear, int& err_num); |
| 2117 | 138 |
| 139 protected: | |
| 140 | |
| 3340 | 141 int mode (void) const { return md; } |
| 2117 | 142 |
| 3340 | 143 oct_mach_info::float_format float_format (void) const { return flt_fmt; } |
| 2117 | 144 |
| 145 // Set current error state and set fail to TRUE. | |
| 146 | |
| 3523 | 147 void error (const std::string& msg); |
| 4468 | 148 void error (const std::string& who, const std::string& msg); |
| 2117 | 149 |
| 150 // Clear any error message and set fail to FALSE. | |
| 151 | |
| 152 void clear (void); | |
| 153 | |
| 4889 | 154 // Clear stream state. |
| 155 | |
| 156 void clearerr (void); | |
| 157 | |
| 2117 | 158 private: |
| 159 | |
| 3340 | 160 // A reference count. |
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161 octave_refcount<octave_idx_type> count; |
| 3340 | 162 |
| 2117 | 163 // The permission bits for the file. Should be some combination of |
| 3544 | 164 // std::ios::open_mode bits. |
| 2117 | 165 int md; |
| 166 | |
| 167 // Data format. | |
| 2317 | 168 oct_mach_info::float_format flt_fmt; |
| 2117 | 169 |
| 170 // TRUE if an error has occurred. | |
| 171 bool fail; | |
| 172 | |
| 3340 | 173 // TRUE if this stream is open. |
| 174 bool open_state; | |
| 175 | |
| 2117 | 176 // Should contain error message if fail is TRUE. |
| 3523 | 177 std::string errmsg; |
| 2117 | 178 |
| 179 // Functions that are defined for all input streams (input streams | |
| 180 // are those that define is). | |
| 181 | |
| 5275 | 182 std::string do_gets (octave_idx_type max_len, bool& err, bool strip_newline, |
| 10313 | 183 const std::string& who /* = "gets" */); |
| 2117 | 184 |
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185 std::string getl (octave_idx_type max_len, bool& err, |
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186 const std::string& who /* = "getl" */); |
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187 std::string gets (octave_idx_type max_len, bool& err, |
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188 const std::string& who /* = "gets" */); |
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189 off_t skipl (off_t count, bool& err, const std::string& who /* = "skipl" */); |
| 2117 | 190 |
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191 octave_value do_scanf (scanf_format_list& fmt_list, octave_idx_type nr, |
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192 octave_idx_type nc, |
| 10313 | 193 bool one_elt_size_spec, octave_idx_type& count, |
| 194 const std::string& who /* = "scanf" */); | |
| 2117 | 195 |
| 4468 | 196 octave_value scanf (const std::string& fmt, const Array<double>& size, |
| 10313 | 197 octave_idx_type& count, const std::string& who /* = "scanf" */); |
| 2117 | 198 |
| 4468 | 199 bool do_oscanf (const scanf_format_elt *elt, octave_value&, |
| 10313 | 200 const std::string& who /* = "scanf" */); |
| 2117 | 201 |
| 4468 | 202 octave_value_list oscanf (const std::string& fmt, |
| 10313 | 203 const std::string& who /* = "scanf" */); |
| 2215 | 204 |
| 2117 | 205 // Functions that are defined for all output streams (output streams |
| 206 // are those that define os). | |
| 207 | |
| 208 int flush (void); | |
| 209 | |
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210 int do_numeric_printf_conv (std::ostream& os, const printf_format_elt *elt, |
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211 int nsa, int sa_1, int sa_2, |
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212 const octave_value& val, |
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213 const std::string& who); |
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214 |
| 4468 | 215 int do_printf (printf_format_list& fmt_list, const octave_value_list& args, |
| 10313 | 216 const std::string& who /* = "printf" */); |
| 2117 | 217 |
| 4468 | 218 int printf (const std::string& fmt, const octave_value_list& args, |
| 10313 | 219 const std::string& who /* = "printf" */); |
| 2117 | 220 |
| 4468 | 221 int puts (const std::string& s, const std::string& who /* = "puts" */); |
| 2117 | 222 |
| 223 // We can always do this in terms of seek(), so the derived class | |
| 224 // only has to provide that. | |
| 225 | |
| 4468 | 226 void invalid_operation (const std::string& who, const char *rw); |
| 2117 | 227 |
| 228 // No copying! | |
| 229 | |
| 230 octave_base_stream (const octave_base_stream&); | |
| 231 | |
| 232 octave_base_stream& operator = (const octave_base_stream&); | |
| 233 }; | |
| 234 | |
| 235 class | |
| 6109 | 236 OCTINTERP_API |
| 2117 | 237 octave_stream |
| 238 { | |
| 239 public: | |
| 240 | |
| 3340 | 241 octave_stream (octave_base_stream *bs = 0); |
| 242 | |
| 243 ~octave_stream (void); | |
| 2117 | 244 |
| 3340 | 245 octave_stream (const octave_stream&); |
| 246 | |
| 247 octave_stream& operator = (const octave_stream&); | |
| 2117 | 248 |
| 249 int flush (void); | |
| 250 | |
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251 std::string getl (octave_idx_type max_len, bool& err, |
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252 const std::string& who /* = "getl" */); |
| 4468 | 253 std::string getl (const octave_value& max_len, bool& err, |
| 10313 | 254 const std::string& who /* = "getl" */); |
| 2117 | 255 |
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256 std::string gets (octave_idx_type max_len, bool& err, |
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257 const std::string& who /* = "gets" */); |
| 4468 | 258 std::string gets (const octave_value& max_len, bool& err, |
| 10313 | 259 const std::string& who /* = "gets" */); |
| 2117 | 260 |
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261 off_t skipl (off_t count, bool& err, const std::string& who /* = "skipl" */); |
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262 off_t skipl (const octave_value& count, bool& err, |
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263 const std::string& who /* = "skipl" */); |
| 9701 | 264 |
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265 int seek (off_t offset, int origin); |
| 2117 | 266 int seek (const octave_value& offset, const octave_value& origin); |
| 267 | |
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268 off_t tell (void); |
| 2117 | 269 |
| 270 int rewind (void); | |
| 271 | |
| 3340 | 272 bool is_open (void) const; |
| 273 | |
| 274 void close (void); | |
| 275 | |
| 5275 | 276 octave_value read (const Array<double>& size, octave_idx_type block_size, |
| 10313 | 277 oct_data_conv::data_type input_type, |
| 278 oct_data_conv::data_type output_type, | |
| 279 octave_idx_type skip, oct_mach_info::float_format flt_fmt, | |
| 280 octave_idx_type& count); | |
| 2117 | 281 |
| 5275 | 282 octave_idx_type write (const octave_value& data, octave_idx_type block_size, |
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283 oct_data_conv::data_type output_type, |
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284 octave_idx_type skip, |
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285 oct_mach_info::float_format flt_fmt); |
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286 |
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287 bool write_bytes (const void *data, size_t n_elts); |
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288 |
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289 bool skip_bytes (size_t n_elts); |
| 4944 | 290 |
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291 template <typename T> |
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292 octave_idx_type write (const Array<T>& data, octave_idx_type block_size, |
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293 oct_data_conv::data_type output_type, |
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294 octave_idx_type skip, |
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295 oct_mach_info::float_format flt_fmt); |
| 2117 | 296 |
| 4468 | 297 octave_value scanf (const std::string& fmt, const Array<double>& size, |
| 10313 | 298 octave_idx_type& count, const std::string& who /* = "scanf" */); |
| 2117 | 299 |
| 5279 | 300 octave_value scanf (const octave_value& fmt, const Array<double>& size, |
| 10313 | 301 octave_idx_type& count, const std::string& who /* = "scanf" */); |
| 5279 | 302 |
| 4468 | 303 octave_value_list oscanf (const std::string& fmt, |
| 10313 | 304 const std::string& who /* = "scanf" */); |
| 2215 | 305 |
| 5279 | 306 octave_value_list oscanf (const octave_value& fmt, |
| 10313 | 307 const std::string& who /* = "scanf" */); |
| 5279 | 308 |
| 4468 | 309 int printf (const std::string& fmt, const octave_value_list& args, |
| 10313 | 310 const std::string& who /* = "printf" */); |
| 2117 | 311 |
| 5279 | 312 int printf (const octave_value& fmt, const octave_value_list& args, |
| 10313 | 313 const std::string& who /* = "printf" */); |
| 5279 | 314 |
| 4468 | 315 int puts (const std::string& s, const std::string& who /* = "puts" */); |
| 316 int puts (const octave_value& s, const std::string& who /* = "puts" */); | |
| 2117 | 317 |
| 318 bool eof (void) const; | |
| 319 | |
| 3523 | 320 std::string error (bool clear, int& err_num); |
| 2117 | 321 |
| 3523 | 322 std::string error (bool clear = false) |
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323 { |
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324 int err_num; |
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325 return error (clear, err_num); |
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326 } |
| 2117 | 327 |
| 4799 | 328 // Set the error message and state. |
| 329 | |
| 330 void error (const std::string& msg) | |
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331 { |
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332 if (rep) |
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333 rep->error (msg); |
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334 } |
| 4799 | 335 |
| 336 void error (const char *msg) { error (std::string (msg)); } | |
| 337 | |
| 3148 | 338 int file_number (void) { return rep ? rep->file_number () : -1; } |
| 3145 | 339 |
| 3340 | 340 bool is_valid (void) const { return (rep != 0); } |
| 341 | |
| 2117 | 342 bool ok (void) const { return rep && rep->ok (); } |
| 343 | |
| 3145 | 344 operator bool () const { return ok (); } |
| 2117 | 345 |
| 3523 | 346 std::string name (void) const; |
| 2117 | 347 |
| 3340 | 348 int mode (void) const; |
| 2117 | 349 |
| 3340 | 350 oct_mach_info::float_format float_format (void) const; |
| 2117 | 351 |
| 3523 | 352 static std::string mode_as_string (int mode); |
| 2117 | 353 |
| 6757 | 354 std::istream *input_stream (void) |
| 355 { | |
| 356 return rep ? rep->input_stream () : 0; | |
| 357 } | |
| 2902 | 358 |
| 6757 | 359 std::ostream *output_stream (void) |
| 360 { | |
| 361 return rep ? rep->output_stream () : 0; | |
| 362 } | |
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363 |
| 4889 | 364 void clearerr (void) { if (rep) rep->clearerr (); } |
| 365 | |
| 2117 | 366 private: |
| 367 | |
| 368 // The actual representation of this stream. | |
| 369 octave_base_stream *rep; | |
| 370 | |
| 5659 | 371 bool stream_ok (bool clear = true) const |
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372 { |
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373 bool retval = true; |
| 5659 | 374 |
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375 if (rep) |
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376 { |
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377 if (clear) |
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378 rep->clear (); |
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379 } |
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380 else |
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381 retval = false; |
| 5659 | 382 |
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383 return retval; |
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384 } |
| 4944 | 385 |
| 386 void invalid_operation (const std::string& who, const char *rw) | |
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387 { |
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388 if (rep) |
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389 rep->invalid_operation (who, rw); |
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390 } |
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391 |
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392 octave_value |
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393 finalize_read (std::list<void *>& input_buf_list, |
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394 octave_idx_type input_buf_elts, |
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395 octave_idx_type elts_read, |
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396 octave_idx_type nr, octave_idx_type nc, |
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397 oct_data_conv::data_type input_type, |
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398 oct_data_conv::data_type output_type, |
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399 oct_mach_info::float_format ffmt); |
| 2117 | 400 }; |
| 401 | |
| 402 class | |
| 6109 | 403 OCTINTERP_API |
| 2117 | 404 octave_stream_list |
| 405 { | |
| 406 protected: | |
| 407 | |
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408 octave_stream_list (void) : list (), lookup_cache (list.end ()) { } |
| 2117 | 409 |
| 410 public: | |
| 411 | |
| 412 ~octave_stream_list (void) { } | |
| 413 | |
| 2926 | 414 static bool instance_ok (void); |
| 415 | |
| 6757 | 416 static int insert (octave_stream& os); |
| 2117 | 417 |
| 4468 | 418 static octave_stream |
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419 lookup (int fid, const std::string& who = ""); |
| 4468 | 420 |
| 421 static octave_stream | |
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422 lookup (const octave_value& fid, const std::string& who = ""); |
| 2117 | 423 |
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424 static int remove (int fid, const std::string& who = ""); |
| 3341 | 425 static int remove (const octave_value& fid, |
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426 const std::string& who = ""); |
| 2117 | 427 |
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428 static void clear (bool flush = true); |
| 2117 | 429 |
| 430 static string_vector get_info (int fid); | |
| 431 static string_vector get_info (const octave_value& fid); | |
| 432 | |
| 3523 | 433 static std::string list_open_files (void); |
| 2117 | 434 |
| 435 static octave_value open_file_numbers (void); | |
| 436 | |
| 2609 | 437 static int get_file_number (const octave_value& fid); |
| 438 | |
| 2117 | 439 private: |
| 440 | |
| 6757 | 441 typedef std::map<int, octave_stream> ostrl_map; |
| 2117 | 442 |
| 6757 | 443 ostrl_map list; |
| 2117 | 444 |
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445 mutable ostrl_map::const_iterator lookup_cache; |
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446 |
| 2117 | 447 static octave_stream_list *instance; |
| 448 | |
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449 static void cleanup_instance (void) { delete instance; instance = 0; } |
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450 |
| 6757 | 451 int do_insert (octave_stream& os); |
| 2117 | 452 |
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453 octave_stream do_lookup (int fid, |
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454 const std::string& who = "") const; |
| 3341 | 455 octave_stream do_lookup (const octave_value& fid, |
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456 const std::string& who = "") const; |
| 2117 | 457 |
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458 int do_remove (int fid, const std::string& who = ""); |
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459 int do_remove (const octave_value& fid, |
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460 const std::string& who = ""); |
| 2117 | 461 |
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462 void do_clear (bool flush = true); |
| 2117 | 463 |
| 464 string_vector do_get_info (int fid) const; | |
| 465 string_vector do_get_info (const octave_value& fid) const; | |
| 466 | |
| 3523 | 467 std::string do_list_open_files (void) const; |
| 2117 | 468 |
| 469 octave_value do_open_file_numbers (void) const; | |
| 470 | |
| 2609 | 471 int do_get_file_number (const octave_value& fid) const; |
| 2117 | 472 }; |
| 473 | |
| 474 #endif |