Mercurial > octave
annotate libinterp/corefcn/oct-stream.h @ 21503:20bf0ec536e2
integrate textscan more completely with octave_stream class
* oct-stream.h, oct-stream.cc (octave_stream::textscan,
octave_base_stream::do_textscan): New functions.
* oct-stream.cc (textscan): Move class declaration here.
* oct-stream.h: From here.
* oct-stream.cc (textscan_format_list, textscan):
New data member for error reporting.
* file-io.cc (Ftextscan): Parse format and ntimes arguments here.
Call octave_stream::textscan.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Sat, 19 Mar 2016 12:19:06 -0400 |
| parents | 7a19c5678f91 |
| children | 5b9868c2e212 |
| rev | line source |
|---|---|
| 2117 | 1 /* |
| 2 | |
|
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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 <iosfwd> |
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29 #include <list> |
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30 #include <map> |
| 2877 | 31 #include <string> |
| 2117 | 32 |
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33 // These are only needed as arguments to private functions, so they |
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34 // are also treated as private. |
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35 |
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36 class scanf_format_elt; |
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37 class scanf_format_list; |
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38 |
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39 class printf_format_elt; |
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40 class printf_format_list; |
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41 |
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42 // These only appear as reference arguments or return values. |
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43 |
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44 template <typename T> class Array; |
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45 class Cell; |
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46 class octave_value_list; |
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47 class string_vector; |
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48 |
| 2317 | 49 #include "data-conv.h" |
| 50 #include "mach-info.h" | |
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51 #include "oct-refcount.h" |
| 2117 | 52 |
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53 #include "ov.h" |
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54 |
| 2117 | 55 // Provide an interface for Octave streams. |
| 56 | |
| 57 class | |
| 6109 | 58 OCTINTERP_API |
| 2117 | 59 octave_base_stream |
| 60 { | |
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61 friend class octave_stream; |
| 2117 | 62 |
| 63 public: | |
| 64 | |
| 3544 | 65 octave_base_stream (std::ios::openmode arg_md = std::ios::in|std::ios::out, |
| 10313 | 66 oct_mach_info::float_format ff |
| 67 = oct_mach_info::native_float_format ()) | |
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68 : count (0), md (arg_md), flt_fmt (ff), fail (false), open_state (true), |
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69 errmsg () |
| 3340 | 70 { } |
| 2117 | 71 |
| 72 virtual ~octave_base_stream (void) { } | |
| 73 | |
| 74 // The remaining functions are not specific to input or output only, | |
| 75 // and must be provided by the derived classes. | |
| 76 | |
| 77 // Position a stream at OFFSET relative to ORIGIN. | |
| 78 | |
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79 virtual int seek (off_t offset, int origin) = 0; |
| 2117 | 80 |
| 81 // Return current stream position. | |
| 82 | |
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83 virtual off_t tell (void) = 0; |
| 2117 | 84 |
| 3340 | 85 // Return TRUE if EOF has been reached on this stream. |
| 2117 | 86 |
| 87 virtual bool eof (void) const = 0; | |
| 88 | |
| 89 // The name of the file. | |
| 90 | |
| 3523 | 91 virtual std::string name (void) const = 0; |
| 2117 | 92 |
| 93 // If the derived class provides this function and it returns a | |
| 94 // pointer to a valid istream, scanf(), read(), getl(), and gets() | |
| 95 // will automatically work for this stream. | |
| 96 | |
| 3523 | 97 virtual std::istream *input_stream (void) { return 0; } |
| 2117 | 98 |
| 99 // If the derived class provides this function and it returns a | |
| 100 // pointer to a valid ostream, flush(), write(), and printf() will | |
| 101 // automatically work for this stream. | |
| 102 | |
| 3523 | 103 virtual std::ostream *output_stream (void) { return 0; } |
| 2117 | 104 |
| 3340 | 105 // Return TRUE if this stream is open. |
| 106 | |
| 107 bool is_open (void) const { return open_state; } | |
| 108 | |
| 3652 | 109 virtual void do_close (void) { } |
| 110 | |
| 111 void close (void) | |
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112 { |
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113 if (is_open ()) |
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114 { |
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115 open_state = false; |
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116 do_close (); |
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117 } |
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118 } |
| 3340 | 119 |
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120 virtual int file_number (void) const |
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121 { |
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122 // Kluge alert! |
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123 |
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124 if (name () == "stdin") |
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125 return 0; |
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126 else if (name () == "stdout") |
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127 return 1; |
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128 else if (name () == "stderr") |
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129 return 2; |
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130 else |
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131 return -1; |
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132 } |
| 3145 | 133 |
| 2117 | 134 bool ok (void) const { return ! fail; } |
| 135 | |
| 136 // Return current error message for this stream. | |
| 137 | |
| 3523 | 138 std::string error (bool clear, int& err_num); |
| 2117 | 139 |
| 140 protected: | |
| 141 | |
| 3340 | 142 int mode (void) const { return md; } |
| 2117 | 143 |
| 3340 | 144 oct_mach_info::float_format float_format (void) const { return flt_fmt; } |
| 2117 | 145 |
| 146 // Set current error state and set fail to TRUE. | |
| 147 | |
| 3523 | 148 void error (const std::string& msg); |
| 4468 | 149 void error (const std::string& who, const std::string& msg); |
| 2117 | 150 |
| 151 // Clear any error message and set fail to FALSE. | |
| 152 | |
| 153 void clear (void); | |
| 154 | |
| 4889 | 155 // Clear stream state. |
| 156 | |
| 157 void clearerr (void); | |
| 158 | |
| 2117 | 159 private: |
| 160 | |
| 3340 | 161 // A reference count. |
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162 octave_refcount<octave_idx_type> count; |
| 3340 | 163 |
| 2117 | 164 // The permission bits for the file. Should be some combination of |
| 3544 | 165 // std::ios::open_mode bits. |
| 2117 | 166 int md; |
| 167 | |
| 168 // Data format. | |
| 2317 | 169 oct_mach_info::float_format flt_fmt; |
| 2117 | 170 |
| 171 // TRUE if an error has occurred. | |
| 172 bool fail; | |
| 173 | |
| 3340 | 174 // TRUE if this stream is open. |
| 175 bool open_state; | |
| 176 | |
| 2117 | 177 // Should contain error message if fail is TRUE. |
| 3523 | 178 std::string errmsg; |
| 2117 | 179 |
| 180 // Functions that are defined for all input streams (input streams | |
| 181 // are those that define is). | |
| 182 | |
| 5275 | 183 std::string do_gets (octave_idx_type max_len, bool& err, bool strip_newline, |
| 10313 | 184 const std::string& who /* = "gets" */); |
| 2117 | 185 |
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186 std::string getl (octave_idx_type max_len, bool& err, |
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187 const std::string& who /* = "getl" */); |
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188 std::string gets (octave_idx_type max_len, bool& err, |
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189 const std::string& who /* = "gets" */); |
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190 off_t skipl (off_t count, bool& err, const std::string& who /* = "skipl" */); |
| 2117 | 191 |
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192 octave_value do_scanf (scanf_format_list& fmt_list, octave_idx_type nr, |
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193 octave_idx_type nc, |
| 10313 | 194 bool one_elt_size_spec, octave_idx_type& count, |
| 195 const std::string& who /* = "scanf" */); | |
| 2117 | 196 |
| 4468 | 197 octave_value scanf (const std::string& fmt, const Array<double>& size, |
| 10313 | 198 octave_idx_type& count, const std::string& who /* = "scanf" */); |
| 2117 | 199 |
| 4468 | 200 bool do_oscanf (const scanf_format_elt *elt, octave_value&, |
| 10313 | 201 const std::string& who /* = "scanf" */); |
| 2117 | 202 |
| 4468 | 203 octave_value_list oscanf (const std::string& fmt, |
| 10313 | 204 const std::string& who /* = "scanf" */); |
| 2215 | 205 |
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206 octave_value do_textscan (const std::string& fmt, octave_idx_type ntimes, |
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207 const octave_value_list& options, |
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208 const std::string& who, octave_idx_type& count); |
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209 |
| 2117 | 210 // Functions that are defined for all output streams (output streams |
| 211 // are those that define os). | |
| 212 | |
| 213 int flush (void); | |
| 214 | |
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215 int do_numeric_printf_conv (std::ostream& os, const printf_format_elt *elt, |
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216 int nsa, int sa_1, int sa_2, |
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217 const octave_value& val, |
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218 const std::string& who); |
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219 |
| 4468 | 220 int do_printf (printf_format_list& fmt_list, const octave_value_list& args, |
| 10313 | 221 const std::string& who /* = "printf" */); |
| 2117 | 222 |
| 4468 | 223 int printf (const std::string& fmt, const octave_value_list& args, |
| 10313 | 224 const std::string& who /* = "printf" */); |
| 2117 | 225 |
| 4468 | 226 int puts (const std::string& s, const std::string& who /* = "puts" */); |
| 2117 | 227 |
| 228 // We can always do this in terms of seek(), so the derived class | |
| 229 // only has to provide that. | |
| 230 | |
| 4468 | 231 void invalid_operation (const std::string& who, const char *rw); |
| 2117 | 232 |
| 233 // No copying! | |
| 234 | |
| 235 octave_base_stream (const octave_base_stream&); | |
| 236 | |
| 237 octave_base_stream& operator = (const octave_base_stream&); | |
| 238 }; | |
| 239 | |
| 240 class | |
| 6109 | 241 OCTINTERP_API |
| 2117 | 242 octave_stream |
| 243 { | |
| 244 public: | |
| 245 | |
| 3340 | 246 octave_stream (octave_base_stream *bs = 0); |
| 247 | |
| 248 ~octave_stream (void); | |
| 2117 | 249 |
| 3340 | 250 octave_stream (const octave_stream&); |
| 251 | |
| 252 octave_stream& operator = (const octave_stream&); | |
| 2117 | 253 |
| 254 int flush (void); | |
| 255 | |
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256 std::string getl (octave_idx_type max_len, bool& err, |
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257 const std::string& who /* = "getl" */); |
| 4468 | 258 std::string getl (const octave_value& max_len, bool& err, |
| 10313 | 259 const std::string& who /* = "getl" */); |
| 2117 | 260 |
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261 std::string gets (octave_idx_type max_len, bool& err, |
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262 const std::string& who /* = "gets" */); |
| 4468 | 263 std::string gets (const octave_value& max_len, bool& err, |
| 10313 | 264 const std::string& who /* = "gets" */); |
| 2117 | 265 |
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266 off_t skipl (off_t count, bool& err, const std::string& who /* = "skipl" */); |
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267 off_t skipl (const octave_value& count, bool& err, |
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268 const std::string& who /* = "skipl" */); |
| 9701 | 269 |
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270 int seek (off_t offset, int origin); |
| 2117 | 271 int seek (const octave_value& offset, const octave_value& origin); |
| 272 | |
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273 off_t tell (void); |
| 2117 | 274 |
| 275 int rewind (void); | |
| 276 | |
| 3340 | 277 bool is_open (void) const; |
| 278 | |
| 279 void close (void); | |
| 280 | |
| 5275 | 281 octave_value read (const Array<double>& size, octave_idx_type block_size, |
| 10313 | 282 oct_data_conv::data_type input_type, |
| 283 oct_data_conv::data_type output_type, | |
| 284 octave_idx_type skip, oct_mach_info::float_format flt_fmt, | |
| 285 octave_idx_type& count); | |
| 2117 | 286 |
| 5275 | 287 octave_idx_type write (const octave_value& data, octave_idx_type block_size, |
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288 oct_data_conv::data_type output_type, |
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289 octave_idx_type skip, |
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290 oct_mach_info::float_format flt_fmt); |
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291 |
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292 bool write_bytes (const void *data, size_t n_elts); |
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293 |
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294 bool skip_bytes (size_t n_elts); |
| 4944 | 295 |
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296 template <typename T> |
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297 octave_idx_type write (const Array<T>& data, octave_idx_type block_size, |
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298 oct_data_conv::data_type output_type, |
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299 octave_idx_type skip, |
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300 oct_mach_info::float_format flt_fmt); |
| 2117 | 301 |
| 4468 | 302 octave_value scanf (const std::string& fmt, const Array<double>& size, |
| 10313 | 303 octave_idx_type& count, const std::string& who /* = "scanf" */); |
| 2117 | 304 |
| 5279 | 305 octave_value scanf (const octave_value& fmt, const Array<double>& size, |
| 10313 | 306 octave_idx_type& count, const std::string& who /* = "scanf" */); |
| 5279 | 307 |
| 4468 | 308 octave_value_list oscanf (const std::string& fmt, |
| 10313 | 309 const std::string& who /* = "scanf" */); |
| 2215 | 310 |
| 5279 | 311 octave_value_list oscanf (const octave_value& fmt, |
| 10313 | 312 const std::string& who /* = "scanf" */); |
| 5279 | 313 |
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314 octave_value textscan (const std::string& fmt, octave_idx_type ntimes, |
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315 const octave_value_list& options, |
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316 const std::string& who, octave_idx_type& count); |
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317 |
| 4468 | 318 int printf (const std::string& fmt, const octave_value_list& args, |
| 10313 | 319 const std::string& who /* = "printf" */); |
| 2117 | 320 |
| 5279 | 321 int printf (const octave_value& fmt, const octave_value_list& args, |
| 10313 | 322 const std::string& who /* = "printf" */); |
| 5279 | 323 |
| 4468 | 324 int puts (const std::string& s, const std::string& who /* = "puts" */); |
| 325 int puts (const octave_value& s, const std::string& who /* = "puts" */); | |
| 2117 | 326 |
| 327 bool eof (void) const; | |
| 328 | |
| 3523 | 329 std::string error (bool clear, int& err_num); |
| 2117 | 330 |
| 3523 | 331 std::string error (bool clear = false) |
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332 { |
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333 int err_num; |
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334 return error (clear, err_num); |
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335 } |
| 2117 | 336 |
| 4799 | 337 // Set the error message and state. |
| 338 | |
| 339 void error (const std::string& msg) | |
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340 { |
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341 if (rep) |
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342 rep->error (msg); |
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343 } |
| 4799 | 344 |
| 345 void error (const char *msg) { error (std::string (msg)); } | |
| 346 | |
| 3148 | 347 int file_number (void) { return rep ? rep->file_number () : -1; } |
| 3145 | 348 |
| 3340 | 349 bool is_valid (void) const { return (rep != 0); } |
| 350 | |
| 2117 | 351 bool ok (void) const { return rep && rep->ok (); } |
| 352 | |
| 3145 | 353 operator bool () const { return ok (); } |
| 2117 | 354 |
| 3523 | 355 std::string name (void) const; |
| 2117 | 356 |
| 3340 | 357 int mode (void) const; |
| 2117 | 358 |
| 3340 | 359 oct_mach_info::float_format float_format (void) const; |
| 2117 | 360 |
| 3523 | 361 static std::string mode_as_string (int mode); |
| 2117 | 362 |
| 6757 | 363 std::istream *input_stream (void) |
| 364 { | |
| 365 return rep ? rep->input_stream () : 0; | |
| 366 } | |
| 2902 | 367 |
| 6757 | 368 std::ostream *output_stream (void) |
| 369 { | |
| 370 return rep ? rep->output_stream () : 0; | |
| 371 } | |
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372 |
| 4889 | 373 void clearerr (void) { if (rep) rep->clearerr (); } |
| 374 | |
| 2117 | 375 private: |
| 376 | |
| 377 // The actual representation of this stream. | |
| 378 octave_base_stream *rep; | |
| 379 | |
| 5659 | 380 bool stream_ok (bool clear = true) const |
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381 { |
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382 bool retval = true; |
| 5659 | 383 |
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384 if (rep) |
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385 { |
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386 if (clear) |
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387 rep->clear (); |
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388 } |
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389 else |
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390 retval = false; |
| 5659 | 391 |
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392 return retval; |
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393 } |
| 4944 | 394 |
| 395 void invalid_operation (const std::string& who, const char *rw) | |
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396 { |
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397 if (rep) |
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398 rep->invalid_operation (who, rw); |
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399 } |
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400 |
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401 octave_value |
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402 finalize_read (std::list<void *>& input_buf_list, |
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403 octave_idx_type input_buf_elts, |
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404 octave_idx_type elts_read, |
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405 octave_idx_type nr, octave_idx_type nc, |
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406 oct_data_conv::data_type input_type, |
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407 oct_data_conv::data_type output_type, |
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408 oct_mach_info::float_format ffmt); |
| 2117 | 409 }; |
| 410 | |
| 411 class | |
| 6109 | 412 OCTINTERP_API |
| 2117 | 413 octave_stream_list |
| 414 { | |
| 415 protected: | |
| 416 | |
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417 octave_stream_list (void) : list (), lookup_cache (list.end ()) { } |
| 2117 | 418 |
| 419 public: | |
| 420 | |
| 421 ~octave_stream_list (void) { } | |
| 422 | |
| 2926 | 423 static bool instance_ok (void); |
| 424 | |
| 6757 | 425 static int insert (octave_stream& os); |
| 2117 | 426 |
| 4468 | 427 static octave_stream |
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428 lookup (int fid, const std::string& who = ""); |
| 4468 | 429 |
| 430 static octave_stream | |
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431 lookup (const octave_value& fid, const std::string& who = ""); |
| 2117 | 432 |
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433 static int remove (int fid, const std::string& who = ""); |
| 3341 | 434 static int remove (const octave_value& fid, |
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435 const std::string& who = ""); |
| 2117 | 436 |
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437 static void clear (bool flush = true); |
| 2117 | 438 |
| 439 static string_vector get_info (int fid); | |
| 440 static string_vector get_info (const octave_value& fid); | |
| 441 | |
| 3523 | 442 static std::string list_open_files (void); |
| 2117 | 443 |
| 444 static octave_value open_file_numbers (void); | |
| 445 | |
| 2609 | 446 static int get_file_number (const octave_value& fid); |
| 447 | |
| 2117 | 448 private: |
| 449 | |
| 6757 | 450 typedef std::map<int, octave_stream> ostrl_map; |
| 2117 | 451 |
| 6757 | 452 ostrl_map list; |
| 2117 | 453 |
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454 mutable ostrl_map::const_iterator lookup_cache; |
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455 |
| 2117 | 456 static octave_stream_list *instance; |
| 457 | |
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458 static void cleanup_instance (void) { delete instance; instance = 0; } |
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459 |
| 6757 | 460 int do_insert (octave_stream& os); |
| 2117 | 461 |
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462 octave_stream do_lookup (int fid, |
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463 const std::string& who = "") const; |
| 3341 | 464 octave_stream do_lookup (const octave_value& fid, |
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465 const std::string& who = "") const; |
| 2117 | 466 |
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467 int do_remove (int fid, const std::string& who = ""); |
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468 int do_remove (const octave_value& fid, |
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469 const std::string& who = ""); |
| 2117 | 470 |
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471 void do_clear (bool flush = true); |
| 2117 | 472 |
| 473 string_vector do_get_info (int fid) const; | |
| 474 string_vector do_get_info (const octave_value& fid) const; | |
| 475 | |
| 3523 | 476 std::string do_list_open_files (void) const; |
| 2117 | 477 |
| 478 octave_value do_open_file_numbers (void) const; | |
| 479 | |
| 2609 | 480 int do_get_file_number (const octave_value& fid) const; |
| 2117 | 481 }; |
| 482 | |
| 483 #endif |