1 // 981208 bkoz test functionality of basic_stringbuf for char_type == char 2 3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003 4 // Free Software Foundation, Inc. 5 // 6 // This file is part of the GNU ISO C++ Library. This library is free 7 // software; you can redistribute it and/or modify it under the 8 // terms of the GNU General Public License as published by the 9 // Free Software Foundation; either version 2, or (at your option) 10 // any later version. 11 12 // This library is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 17 // You should have received a copy of the GNU General Public License along 18 // with this library; see the file COPYING. If not, write to the Free 19 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 20 // USA. 21 22 #include <sstream> 23 #include <testsuite_hooks.h> 24 25 std::string str_01("mykonos. . . or what?"); 26 std::string str_02("paris, or sainte-maxime?"); 27 std::string str_03; 28 std::stringbuf strb_01(str_01); 29 std::stringbuf strb_02(str_02, std::ios_base::in); 30 std::stringbuf strb_03(str_03, std::ios_base::out); 31 32 33 // test the underlying allocator 34 bool test01() { 35 bool test = false; 36 std::allocator<char> alloc_01; 37 std::allocator<char>::size_type size_01 = alloc_01.max_size(); 38 std::allocator<char>::pointer p_01 = alloc_01.allocate(32); 39 40 return true; 41 } 42 43 44 // test the streambuf/stringbuf locale settings 45 bool test02() { 46 std::locale loc_tmp; 47 loc_tmp = strb_01.getloc(); 48 strb_01.pubimbue(loc_tmp); //This should initialize _M_init to true 49 strb_01.getloc(); //This should just return _M_locale 50 51 return true; 52 } 53 54 55 // test member functions 56 bool test03() { 57 bool test = true; 58 59 //stringbuf::str() 60 VERIFY( strb_01.str() == str_01 ); 61 VERIFY( strb_02.str() == str_02 ); 62 VERIFY( strb_03.str() == str_03 ); 63 64 //stringbuf::str(string&) 65 strb_03.str("none of the above, go to the oberoi in cairo, egypt."); 66 strb_03.str(str_01); 67 std::streamsize d1 = strb_01.in_avail(); 68 std::streamsize d2 = strb_03.in_avail(); 69 VERIFY( d1 ); // non-zero 70 VERIFY( !d2 ); // zero, cuz ios_base::out 71 VERIFY( d1 != d2 ); //these should be the same 72 VERIFY( str_01.length() == d1 ); 73 VERIFY( strb_01.str() == strb_03.str() ); //ditto 74 75 // stringbuf::str(string&) and stringbuf::stringbuf(string&), where the 76 // string in question contains embedded NUL characters. Note that in this 77 // embedded-NUL situation, the size must be passed to the string ctor. 78 std::string str_nulls ("eschew \0 obfuscation", 20); // tested in 21_strings 79 std::stringbuf strb_normal (str_01); 80 std::stringbuf strb_nulls (str_nulls); 81 strb_normal.str(str_nulls); // tried using 'strb_01' rather than declaring 82 // another variable, but then test04 broke! 83 VERIFY( strb_nulls.in_avail() == str_nulls.size() ); 84 VERIFY( strb_nulls.str().size() == 20 ); 85 VERIFY( strb_normal.in_avail() == str_nulls.size() ); 86 87 #ifdef DEBUG_ASSERT 88 assert(test); 89 #endif 90 91 return test; 92 } 93 94 95 // test overloaded virtual functions 96 bool test04() { 97 bool test = true; 98 std::string str_tmp; 99 std::stringbuf strb_tmp; 100 std::streamsize strmsz_1, strmsz_2; 101 std::streamoff strmof_1(-1), strmof_2; 102 typedef std::stringbuf::int_type int_type; 103 typedef std::stringbuf::traits_type traits_type; 104 typedef std::stringbuf::pos_type pos_type; 105 typedef std::stringbuf::off_type off_type; 106 107 // GET 108 // int in_avail() 109 strmof_1 = strb_01.in_avail(); 110 strmof_2 = strb_02.in_avail(); 111 VERIFY( strmof_1 != strmof_2 ); 112 VERIFY( strmof_1 == str_01.length() ); 113 VERIFY( strmof_2 == str_02.length() ); 114 strmof_1 = strb_03.in_avail(); 115 VERIFY( strmof_1 == 0 ); // zero cuz write-only, or eof()? zero, from showmany 116 117 // int_type sbumpc() 118 // if read_cur not avail, return uflow(), else return *read_cur & increment 119 int_type c1 = strb_01.sbumpc(); 120 int_type c2 = strb_02.sbumpc(); 121 VERIFY( c1 != c2 ); 122 VERIFY( c1 == str_01[0] ); 123 VERIFY( c2 == str_02[0] ); //should equal first letter at this point 124 int_type c3 = strb_01.sbumpc(); 125 int_type c4 = strb_02.sbumpc(); 126 VERIFY( c1 != c2 ); 127 VERIFY( c1 != c3 ); 128 VERIFY( c2 != c4 ); 129 int_type c5 = strb_03.sbumpc(); 130 VERIFY( c5 == traits_type::eof() ); 131 132 // int_type sgetc() 133 // if read_cur not avail, return uflow(), else return *read_cur 134 int_type c6 = strb_01.sgetc(); 135 int_type c7 = strb_02.sgetc(); 136 VERIFY( c6 != c3 ); 137 VERIFY( c7 != c4 ); 138 int_type c8 = strb_01.sgetc(); 139 int_type c9 = strb_02.sgetc(); 140 VERIFY( c6 == c8 ); 141 VERIFY( c7 == c9 ); 142 c5 = strb_03.sgetc(); 143 VERIFY( c5 == traits_type::eof() ); 144 145 // int_type snextc() 146 // calls sbumpc and if sbumpc != eof, return sgetc 147 c6 = strb_01.snextc(); 148 c7 = strb_02.snextc(); 149 VERIFY( c6 != c8 ); 150 VERIFY( c7 != c9 ); 151 VERIFY( c6 == str_01[3] ); 152 VERIFY( c7 == str_02[3] ); //should equal fourth letter at this point 153 c5 = strb_03.snextc(); 154 VERIFY( c5 == traits_type::eof() ); 155 156 // int showmanyc 157 // streamsize sgetn(char_type *s, streamsize n) 158 // streamsize xsgetn(char_type *s, streamsize n) 159 // assign up to n chars to s from input sequence, indexing in_cur as 160 // approp and returning the number of chars assigned 161 strmsz_1 = strb_01.in_avail(); 162 strmsz_2 = strb_02.in_avail(); 163 test = strmsz_1 != strmsz_2; 164 VERIFY( strmsz_1 != str_01.length() ); 165 VERIFY( strmsz_2 != str_02.length() ); //because now we've moved into string 166 char carray1[11] = ""; 167 strmsz_1 = strb_01.sgetn(carray1, 10); 168 char carray2[20] = ""; 169 strmsz_2 = strb_02.sgetn(carray2, 10); 170 VERIFY( strmsz_1 == strmsz_2 ); 171 VERIFY( strmsz_1 == 10 ); 172 c1 = strb_01.sgetc(); 173 c2 = strb_02.sgetc(); 174 VERIFY( c6 == c1 ); //just by co-incidence both o's 175 VERIFY( c7 != c2 ); // n != i 176 VERIFY( c1 == str_01[13] ); 177 VERIFY( c2 == str_02[13] ); //should equal fourteenth letter at this point 178 strmsz_1 = strb_03.sgetn(carray1, 10); 179 VERIFY( !strmsz_1 ); //zero 180 strmsz_1 = strb_02.in_avail(); 181 strmsz_2 = strb_02.sgetn(carray2, strmsz_1 + 5); 182 VERIFY( strmsz_1 == strmsz_2 ); //write off the end 183 c4 = strb_02.sgetc(); // should be EOF 184 VERIFY( c4 == traits_type::eof() ); 185 186 // PUT 187 // int_type sputc(char_type c) 188 // if out_cur not avail, return overflow. Else, stores c at out_cur, 189 // increments out_cur, and returns c as int_type 190 strb_03.str(str_01); //reset 191 std::string::size_type sz1 = strb_03.str().length(); 192 c1 = strb_03.sputc('a'); 193 std::string::size_type sz2 = strb_03.str().length(); 194 VERIFY( sz1 == sz2 ); //cuz inserting at out_cur, which is at beg to start 195 c2 = strb_03.sputc('b'); 196 VERIFY( c1 != c2 ); 197 VERIFY( strb_03.str() != str_01 ); 198 c3 = strb_02.sputc('a'); // should be EOF because this is read-only 199 VERIFY( c3 == traits_type::eof() ); 200 201 // streamsize sputn(const char_typs* s, streamsize n) 202 // write up to n chars to out_cur from s, returning number assigned 203 // NB *sputn will happily put '\0' into your stream if you give it a chance* 204 str_tmp = strb_03.str(); 205 sz1 = str_tmp.length(); 206 strmsz_1 = strb_03.sputn("racadabras", 10);//"abracadabras or what?" 207 sz2 = strb_03.str().length(); 208 VERIFY( sz1 == sz2 ); //shouldn't have changed length 209 VERIFY( strmsz_1 == 10 ); 210 VERIFY( str_tmp != strb_03.str() ); 211 strmsz_2 = strb_03.sputn(", i wanna reach out and", 10); 212 VERIFY( strmsz_1 == strmsz_2 ); // should re-allocate, copy 10 chars. 213 VERIFY( strmsz_1 == 10 ); 214 VERIFY( strmsz_2 == 10 ); 215 sz2 = strb_03.str().length(); 216 VERIFY( sz1 != sz2 ); // need to change length 217 VERIFY( str_tmp != strb_03.str() ); 218 str_tmp = strb_02.str(); 219 strmsz_1 = strb_02.sputn("racadabra", 10); 220 VERIFY( strmsz_1 == 0 ); 221 VERIFY( str_tmp == strb_02.str() ); 222 223 // PUTBACK 224 // int_type pbfail(int_type c) 225 // called when gptr() null, gptr() == eback(), or traits::eq(*gptr, c) false 226 // "pending sequence" is: 227 // 1) everything as defined in underflow 228 // 2) + if (traits::eq_int_type(c, traits::eof()), then input 229 // sequence is backed up one char before the pending sequence is 230 // determined. 231 // 3) + if (not 2) then c is prepended. Left unspecified is 232 // whether the input sequence is backedup or modified in any way 233 // returns traits::eof() for failure, unspecified other value for success 234 235 // int_type sputbackc(char_type c) 236 // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail 237 // otherwise decrements in_cur and returns *gptr() 238 strmsz_1 = strb_01.in_avail(); 239 str_tmp = strb_01.str(); 240 c1 = strb_01.sgetc(); //"mykonos. . . 'o'r what?" 241 c2 = strb_01.sputbackc('z');//"mykonos. . .zor what?" 242 c3 = strb_01.sgetc(); 243 VERIFY( c1 != c2 ); 244 VERIFY( c3 == c2 ); 245 VERIFY( strb_01.str() == std::string("mykonos. . .zor what?") ); 246 VERIFY( str_tmp.size() == strb_01.str().size() ); 247 //test for _in_cur == _in_beg 248 strb_01.str(str_tmp); 249 strmsz_1 = strb_01.in_avail(); 250 c1 = strb_01.sgetc(); //"'m'ykonos. . . or what?" 251 c2 = strb_01.sputbackc('z');//"mykonos. . . or what?" 252 c3 = strb_01.sgetc(); 253 VERIFY( c1 != c2 ); 254 VERIFY( c3 != c2 ); 255 VERIFY( c1 == c3 ); 256 VERIFY( c2 == traits_type::eof() ); 257 VERIFY( strb_01.str() == str_tmp ); 258 VERIFY( str_tmp.size() == strb_01.str().size() ); 259 // test for replacing char with identical one 260 strb_01.str(str_01); //reset 261 strmsz_1 = strb_01.in_avail(); 262 strb_01.sbumpc(); 263 strb_01.sbumpc(); 264 c1 = strb_01.sgetc(); //"my'k'onos. . . or what?" 265 c2 = strb_01.sputbackc('y');//"mykonos. . . or what?" 266 c3 = strb_01.sgetc(); 267 VERIFY( c1 != c2 ); 268 VERIFY( c3 == c2 ); 269 VERIFY( c1 != c3 ); 270 VERIFY( strb_01.str() == str_01 ); 271 VERIFY( str_01.size() == strb_01.str().size() ); 272 //test for ios_base::out 273 strmsz_2 = strb_03.in_avail(); 274 c4 = strb_03.sputbackc('x'); 275 VERIFY( c4 == traits_type::eof() ); 276 277 // int_type sungetc() 278 // if in_cur not avail, return pbackfail(), else decrement and 279 // return to_int_type(*gptr()) 280 for (int i = 0; i<12; ++i) 281 strb_01.sbumpc(); 282 strmsz_1 = strb_01.in_avail(); 283 str_tmp = strb_01.str(); 284 c1 = strb_01.sgetc(); //"mykonos. . . 'o'r what?" 285 c2 = strb_01.sungetc();//"mykonos. . . or what?" 286 c3 = strb_01.sgetc(); 287 VERIFY( c1 != c2 ); 288 VERIFY( c3 == c2 ); 289 VERIFY( c1 != c3 ); 290 VERIFY( c2 == ' ' ); 291 VERIFY( strb_01.str() == str_01 ); 292 VERIFY( str_01.size() == strb_01.str().size() ); 293 //test for _in_cur == _in_beg 294 strb_01.str(str_tmp); 295 strmsz_1 = strb_01.in_avail(); 296 c1 = strb_01.sgetc(); //"'m'ykonos. . . or what?" 297 c2 = strb_01.sungetc();//"mykonos. . . or what?" 298 c3 = strb_01.sgetc(); 299 VERIFY( c1 != c2 ); 300 VERIFY( c3 != c2 ); 301 VERIFY( c1 == c3 ); 302 VERIFY( c2 == traits_type::eof() ); 303 VERIFY( strb_01.str() == str_01 ); 304 VERIFY( str_01.size() == strb_01.str().size() ); 305 // test for replacing char with identical one 306 strb_01.str(str_01); //reset 307 strmsz_1 = strb_01.in_avail(); 308 strb_01.sbumpc(); 309 strb_01.sbumpc(); 310 c1 = strb_01.sgetc(); //"my'k'onos. . . or what?" 311 c2 = strb_01.sungetc();//"mykonos. . . or what?" 312 c3 = strb_01.sgetc(); 313 VERIFY( c1 != c2 ); 314 VERIFY( c3 == c2 ); 315 VERIFY( c1 != c3 ); 316 VERIFY( strb_01.str() == str_01 ); 317 VERIFY( str_01.size() == strb_01.str().size() ); 318 //test for ios_base::out 319 strmsz_2 = strb_03.in_avail(); 320 c4 = strb_03.sungetc(); 321 VERIFY( c4 == traits_type::eof() ); 322 323 // BUFFER MANAGEMENT & POSITIONING 324 // sync 325 // pubsync 326 strb_01.pubsync(); 327 strb_02.pubsync(); 328 strb_03.pubsync(); 329 330 // setbuf 331 // pubsetbuf(char_type* s, streamsize n) 332 str_tmp = std::string("naaaah, go to cebu"); 333 strb_01.pubsetbuf(const_cast<char*> (str_tmp.c_str()), str_tmp.size()); 334 VERIFY( strb_01.str() == str_tmp ); 335 strb_01.pubsetbuf(0,0); 336 VERIFY( strb_01.str() == str_tmp ); 337 338 // seekoff 339 // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which) 340 // alters the stream position to off 341 pos_type pt_1(off_type(-1)); 342 pos_type pt_2(off_type(0)); 343 off_type off_1 = 0; 344 off_type off_2 = 0; 345 strb_01.str(str_01); //in|out ("mykonos. . . or what?"); 346 strb_02.str(str_02); //in ("paris, or sainte-maxime?"); 347 strb_03.str(str_03); //out ("") 348 //IN|OUT 349 //beg 350 pt_1 = strb_01.pubseekoff(2, std::ios_base::beg); 351 off_1 = pt_1; 352 VERIFY( off_1 >= 0 ); 353 c1 = strb_01.snextc(); //current in pointer +1 354 VERIFY( c1 == 'o' ); 355 c2 = strb_01.sputc('x'); //test current out pointer 356 str_tmp = std::string("myxonos. . . or what?"); 357 VERIFY( strb_01.str() == str_tmp ); 358 //cur 359 pt_1 = strb_01.pubseekoff(2, std::ios_base::cur); 360 off_1 = pt_1; 361 VERIFY( off_1 == -1 ); // can't seekoff for in and out + cur in sstreams 362 pt_1 = strb_01.pubseekoff(2, std::ios_base::cur, std::ios_base::in); 363 off_1 = pt_1; 364 pt_2 = strb_01.pubseekoff(2, std::ios_base::cur, std::ios_base::in); 365 off_2 = pt_2; 366 VERIFY( off_2 == off_1 + 2 ); 367 c1 = strb_01.snextc(); //current in pointer + 1 368 VERIFY( c1 == ' ' ); 369 c2 = strb_01.sputc('x'); //test current out pointer 370 str_tmp = std::string("myxxnos. . . or what?"); 371 VERIFY( strb_01.str() == str_tmp ); 372 //end 373 pt_2 = strb_01.pubseekoff(2, std::ios_base::end); 374 off_1 = pt_2; 375 VERIFY( off_1 == -1 ); // not a valid position 376 VERIFY( strb_01.str() == str_tmp ); 377 // end part two (from the filebuf tests) 378 strb_01.pubseekoff(0, std::ios_base::end); 379 strmsz_1 = strb_01.in_avail(); // 0 cuz at the end 380 c1 = strb_01.sgetc(); 381 c2 = strb_01.sungetc(); 382 strmsz_2 = strb_01.in_avail(); // 1 383 c3 = strb_01.sgetc(); 384 VERIFY( c1 != c2 ); 385 VERIFY( strmsz_2 != strmsz_1 ); 386 VERIFY( strmsz_2 == 1 ); 387 // end part three 388 strmsz_1 = strb_01.str().size(); 389 strmsz_2 = strb_01.sputn(" ravi shankar meets carlos santana in LoHa", 90); 390 strb_01.pubseekoff(0, std::ios_base::end); 391 strb_01.sputc('<'); 392 str_tmp = strb_01.str(); 393 VERIFY( str_tmp.size() == strmsz_1 + strmsz_2 + 1 ); 394 // IN 395 // OUT 396 397 // seekpos 398 // pubseekpos(pos_type sp, ios_base::openmode) 399 // alters the stream position to sp 400 strb_01.str(str_01); //in|out ("mykonos. . . or what?"); 401 strb_02.str(str_02); //in ("paris, or sainte-maxime?"); 402 strb_03.str(str_03); //out ("") 403 //IN|OUT 404 //beg 405 pt_1 = strb_01.pubseekoff(2, std::ios_base::beg); 406 off_1 = pt_1; 407 VERIFY( off_1 >= 0 ); 408 pt_1 = strb_01.pubseekoff(0, std::ios_base::cur, std::ios_base::out); 409 off_1 = pt_1; 410 c1 = strb_01.snextc(); //current in pointer +1 411 VERIFY( c1 == 'o' ); 412 c2 = strb_01.sputc('x'); //test current out pointer 413 str_tmp = std::string("myxonos. . . or what?"); 414 VERIFY( strb_01.str() == str_tmp ); 415 strb_01.pubsync(); //resets pointers 416 pt_2 = strb_01.pubseekpos(pt_1, std::ios_base::in|std::ios_base::out); 417 off_2 = pt_2; 418 VERIFY( off_1 == off_2 ); 419 c3 = strb_01.snextc(); //current in pointer +1 420 VERIFY( c1 == c3 ); 421 c2 = strb_01.sputc('x'); //test current out pointer 422 str_tmp = std::string("myxonos. . . or what?"); 423 VERIFY( strb_01.str() == str_tmp ); 424 425 // VIRTUALS (indirectly tested) 426 // underflow 427 // if read position avail, returns *gptr() 428 429 // pbackfail(int_type c) 430 // put c back into input sequence 431 432 // overflow 433 // appends c to output seq 434 435 #ifdef DEBUG_ASSERT 436 assert(test); 437 #endif 438 439 return test; 440 } 441 442 443 // libstdc++/3955 -- ios_base::app overwrites from the beginning 444 bool test05() 445 { 446 bool test = true; 447 448 std::ostringstream os ("foo"); 449 os << "bar"; 450 451 test = os.str() == "bar"; 452 453 #ifdef DEBUG_ASSERT 454 assert(test); 455 #endif 456 457 return test; 458 } 459 460 bool test06() 461 { 462 bool test = true; 463 464 std::ostringstream os ("foo", std::ios_base::app); 465 os << "bar"; 466 467 test = os.str() == "foobar"; 468 469 #ifdef DEBUG_ASSERT 470 assert(test); 471 #endif 472 473 return test; 474 } 475 476 // http://gcc.gnu.org/ml/libstdc++/2003-02/msg00269.html 477 // Growing and then seeking to ios_base::beg triggered a bug in str(), 478 // which didn't notice the grow. 479 bool test07() 480 { 481 bool test = true; 482 483 std::stringbuf strb_01; 484 strb_01.sputc('s'); 485 strb_01.pubseekoff(0, std::ios_base::beg); 486 VERIFY( strb_01.str() == "s" ); 487 488 std::string str("strivi,"); 489 std::stringbuf strb_02(str); 490 strb_02.pubseekoff(0, std::ios_base::end); 491 strb_02.sputn(" no better!", 11); 492 strb_02.pubseekoff(0, std::ios_base::beg); 493 VERIFY( strb_02.str() == "strivi, no better!" ); 494 495 #ifdef DEBUG_ASSERT 496 assert(test); 497 #endif 498 499 return test; 500 } 501 502 int main() 503 { 504 test01(); 505 test02(); 506 test03(); 507 test04(); 508 test05(); 509 test06(); 510 test07(); 511 512 return 0; 513 } 514 515 516 517 // more candy!!! 518