| 11 |
// enhanced with contributions from Terje Slettebo, |
// enhanced with contributions from Terje Slettebo, |
| 12 |
// with additional fixes and suggestions from Gennaro Prota, |
// with additional fixes and suggestions from Gennaro Prota, |
| 13 |
// Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov, |
// Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov, |
| 14 |
// and other Boosters |
// Alexander Nasonov and other Boosters |
| 15 |
// when: November 2000, March 2003, June 2005 |
// when: November 2000, March 2003, June 2005, June 2006 |
| 16 |
|
|
| 17 |
|
#include <climits> |
| 18 |
#include <cstddef> |
#include <cstddef> |
| 19 |
|
#include <istream> |
| 20 |
|
#include <locale> |
| 21 |
#include <string> |
#include <string> |
| 22 |
#include <typeinfo> |
#include <typeinfo> |
| 23 |
#include <boost/config.hpp> |
#include <boost/config.hpp> |
| 24 |
#include <boost/limits.hpp> |
#include <boost/limits.hpp> |
| 25 |
|
#include <boost/mpl/if.hpp> |
| 26 |
#include <boost/throw_exception.hpp> |
#include <boost/throw_exception.hpp> |
| 27 |
#include <boost/type_traits/is_pointer.hpp> |
#include <boost/type_traits/is_pointer.hpp> |
| 28 |
#include <boost/call_traits.hpp> |
#include <boost/call_traits.hpp> |
| 29 |
|
#include <boost/static_assert.hpp> |
| 30 |
|
|
| 31 |
#ifdef BOOST_NO_STRINGSTREAM |
#ifdef BOOST_NO_STRINGSTREAM |
| 32 |
#include <strstream> |
#include <strstream> |
| 86 |
}; |
}; |
| 87 |
|
|
| 88 |
#ifndef DISABLE_WIDE_CHAR_SUPPORT |
#ifndef DISABLE_WIDE_CHAR_SUPPORT |
| 89 |
#if !defined(BOOST_NO_INTRINSIC_WCHAR_T) |
#ifndef BOOST_NO_INTRINSIC_WCHAR_T |
| 90 |
template<> |
template<> |
| 91 |
struct stream_char<wchar_t> |
struct stream_char<wchar_t> |
| 92 |
{ |
{ |
| 126 |
}; |
}; |
| 127 |
} |
} |
| 128 |
|
|
| 129 |
|
namespace detail // lcast_src_length |
| 130 |
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{ |
| 131 |
|
// Return max. length of string representation of Source; |
| 132 |
|
// 0 if unlimited (with exceptions for some types, see below). |
| 133 |
|
// Values with limited string representation are placed to |
| 134 |
|
// the buffer locally defined in lexical_cast function. |
| 135 |
|
// 1 is returned for few types such as CharT const* or |
| 136 |
|
// std::basic_string<CharT> that already have an internal |
| 137 |
|
// buffer ready to be reused by lexical_stream_limited_src. |
| 138 |
|
// Each specialization should have a correspondent operator<< |
| 139 |
|
// defined in lexical_stream_limited_src. |
| 140 |
|
template< class CharT // A result of widest_char transformation. |
| 141 |
|
, class Source // Source type of lexical_cast. |
| 142 |
|
> |
| 143 |
|
struct lcast_src_length |
| 144 |
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{ |
| 145 |
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BOOST_STATIC_CONSTANT(std::size_t, value = 0); |
| 146 |
|
// To check coverage, build the test with |
| 147 |
|
// bjam --v2 profile optimization=off |
| 148 |
|
static void check_coverage() {} |
| 149 |
|
}; |
| 150 |
|
|
| 151 |
|
template<> |
| 152 |
|
struct lcast_src_length<char, bool> |
| 153 |
|
{ |
| 154 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 155 |
|
static void check_coverage() {} |
| 156 |
|
}; |
| 157 |
|
|
| 158 |
|
template<> |
| 159 |
|
struct lcast_src_length<char, char> |
| 160 |
|
{ |
| 161 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 162 |
|
static void check_coverage() {} |
| 163 |
|
}; |
| 164 |
|
|
| 165 |
|
// No specializations for: |
| 166 |
|
// lcast_src_length<char, signed char> |
| 167 |
|
// lcast_src_length<char, unsigned char> |
| 168 |
|
// lcast_src_length<char, signed char*> |
| 169 |
|
// lcast_src_length<char, unsigned char*> |
| 170 |
|
// lcast_src_length<char, signed char const*> |
| 171 |
|
// lcast_src_length<char, unsigned char const*> |
| 172 |
|
|
| 173 |
|
#ifndef DISABLE_WIDE_CHAR_SUPPORT |
| 174 |
|
template<> |
| 175 |
|
struct lcast_src_length<wchar_t, bool> |
| 176 |
|
{ |
| 177 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 178 |
|
static void check_coverage() {} |
| 179 |
|
}; |
| 180 |
|
|
| 181 |
|
template<> |
| 182 |
|
struct lcast_src_length<wchar_t, char> |
| 183 |
|
{ |
| 184 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 185 |
|
static void check_coverage() {} |
| 186 |
|
}; |
| 187 |
|
|
| 188 |
|
#ifndef BOOST_NO_INTRINSIC_WCHAR_T |
| 189 |
|
template<> |
| 190 |
|
struct lcast_src_length<wchar_t, wchar_t> |
| 191 |
|
{ |
| 192 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 193 |
|
static void check_coverage() {} |
| 194 |
|
}; |
| 195 |
|
#endif |
| 196 |
|
#endif |
| 197 |
|
|
| 198 |
|
template<> |
| 199 |
|
struct lcast_src_length<char, char const*> |
| 200 |
|
{ |
| 201 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 202 |
|
static void check_coverage() {} |
| 203 |
|
}; |
| 204 |
|
|
| 205 |
|
template<> |
| 206 |
|
struct lcast_src_length<char, char*> |
| 207 |
|
{ |
| 208 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 209 |
|
static void check_coverage() {} |
| 210 |
|
}; |
| 211 |
|
|
| 212 |
|
#ifndef DISABLE_WIDE_CHAR_SUPPORT |
| 213 |
|
template<> |
| 214 |
|
struct lcast_src_length<wchar_t, wchar_t const*> |
| 215 |
|
{ |
| 216 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 217 |
|
static void check_coverage() {} |
| 218 |
|
}; |
| 219 |
|
|
| 220 |
|
template<> |
| 221 |
|
struct lcast_src_length<wchar_t, wchar_t*> |
| 222 |
|
{ |
| 223 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 224 |
|
static void check_coverage() {} |
| 225 |
|
}; |
| 226 |
|
#endif |
| 227 |
|
|
| 228 |
|
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
| 229 |
|
template<class CharT, class Traits, class Alloc> |
| 230 |
|
struct lcast_src_length< CharT, std::basic_string<CharT,Traits,Alloc> > |
| 231 |
|
{ |
| 232 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 233 |
|
static void check_coverage() {} |
| 234 |
|
}; |
| 235 |
|
#else |
| 236 |
|
template<> |
| 237 |
|
struct lcast_src_length< char, std::basic_string<char> > |
| 238 |
|
{ |
| 239 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 240 |
|
static void check_coverage() {} |
| 241 |
|
}; |
| 242 |
|
|
| 243 |
|
#ifndef DISABLE_WIDE_CHAR_SUPPORT |
| 244 |
|
template<> |
| 245 |
|
struct lcast_src_length< wchar_t, std::basic_string<wchar_t> > |
| 246 |
|
{ |
| 247 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 1); |
| 248 |
|
static void check_coverage() {} |
| 249 |
|
}; |
| 250 |
|
#endif |
| 251 |
|
#endif |
| 252 |
|
|
| 253 |
|
// Helper for integral types. |
| 254 |
|
// Notes on length calculation: |
| 255 |
|
// Max length for 32bit int with grouping "\1" and thousands_sep ',': |
| 256 |
|
// "-2,1,4,7,4,8,3,6,4,7" |
| 257 |
|
// ^ - is_signed |
| 258 |
|
// ^ - 1 digit not counted by digits10 |
| 259 |
|
// ^^^^^^^^^^^^^^^^^^ - digits10 * 2 |
| 260 |
|
// |
| 261 |
|
// Constant is_specialized is used instead of constant 1 |
| 262 |
|
// to prevent buffer overflow in a rare case when |
| 263 |
|
// <boost/limits.hpp> doesn't add missing specialization for |
| 264 |
|
// numeric_limits<T> for some integral type T. |
| 265 |
|
// When is_specialized is false, the whole expression is 0. |
| 266 |
|
template<class Source> |
| 267 |
|
struct lcast_src_length_integral |
| 268 |
|
{ |
| 269 |
|
#if !defined(__BORLANDC__) || __BORLANDC__ >= 0x581 |
| 270 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = |
| 271 |
|
std::numeric_limits<Source>::is_signed + |
| 272 |
|
std::numeric_limits<Source>::is_specialized + // == 1 |
| 273 |
|
std::numeric_limits<Source>::digits10 * 2 |
| 274 |
|
); |
| 275 |
|
#else |
| 276 |
|
BOOST_STATIC_CONSTANT(std::size_t, value = 156); // 256bit integers |
| 277 |
|
#endif |
| 278 |
|
}; |
| 279 |
|
|
| 280 |
|
#define BOOST_AUX_LEXICAL_CAST_DEF1(CharT, T) template<> \ |
| 281 |
|
struct lcast_src_length<CharT, T> : lcast_src_length_integral<T> \ |
| 282 |
|
{ static void check_coverage() {} }; |
| 283 |
|
|
| 284 |
|
#ifdef DISABLE_WIDE_CHAR_SUPPORT |
| 285 |
|
#define BOOST_AUX_LEXICAL_CAST_DEF(T) BOOST_AUX_LEXICAL_CAST_DEF1(char, T) |
| 286 |
|
#else |
| 287 |
|
#define BOOST_AUX_LEXICAL_CAST_DEF(T) \ |
| 288 |
|
BOOST_AUX_LEXICAL_CAST_DEF1(char, T) \ |
| 289 |
|
BOOST_AUX_LEXICAL_CAST_DEF1(wchar_t, T) |
| 290 |
|
#endif |
| 291 |
|
|
| 292 |
|
BOOST_AUX_LEXICAL_CAST_DEF(short) |
| 293 |
|
BOOST_AUX_LEXICAL_CAST_DEF(unsigned short) |
| 294 |
|
BOOST_AUX_LEXICAL_CAST_DEF(int) |
| 295 |
|
BOOST_AUX_LEXICAL_CAST_DEF(unsigned int) |
| 296 |
|
BOOST_AUX_LEXICAL_CAST_DEF(long) |
| 297 |
|
BOOST_AUX_LEXICAL_CAST_DEF(unsigned long) |
| 298 |
|
#if defined(BOOST_HAS_LONG_LONG) |
| 299 |
|
BOOST_AUX_LEXICAL_CAST_DEF(boost::ulong_long_type) |
| 300 |
|
BOOST_AUX_LEXICAL_CAST_DEF(boost::long_long_type ) |
| 301 |
|
#elif defined(BOOST_HAS_MS_INT64) |
| 302 |
|
BOOST_AUX_LEXICAL_CAST_DEF(unsigned __int64) |
| 303 |
|
BOOST_AUX_LEXICAL_CAST_DEF( __int64) |
| 304 |
|
#endif |
| 305 |
|
|
| 306 |
|
#undef BOOST_AUX_LEXICAL_CAST_DEF |
| 307 |
|
#undef BOOST_AUX_LEXICAL_CAST_DEF1 |
| 308 |
|
|
| 309 |
|
} |
| 310 |
|
|
| 311 |
|
namespace detail // '0' and '-' constants |
| 312 |
|
{ |
| 313 |
|
template<typename CharT> struct lcast_char_constants; |
| 314 |
|
|
| 315 |
|
template<> |
| 316 |
|
struct lcast_char_constants<char> |
| 317 |
|
{ |
| 318 |
|
BOOST_STATIC_CONSTANT(char, zero = '0'); |
| 319 |
|
BOOST_STATIC_CONSTANT(char, minus = '-'); |
| 320 |
|
}; |
| 321 |
|
|
| 322 |
|
#ifndef DISABLE_WIDE_CHAR_SUPPORT |
| 323 |
|
template<> |
| 324 |
|
struct lcast_char_constants<wchar_t> |
| 325 |
|
{ |
| 326 |
|
BOOST_STATIC_CONSTANT(wchar_t, zero = L'0'); |
| 327 |
|
BOOST_STATIC_CONSTANT(wchar_t, minus = L'-'); |
| 328 |
|
}; |
| 329 |
|
#endif |
| 330 |
|
} |
| 331 |
|
|
| 332 |
|
namespace detail // public access to basic_streambuf<CharT>::setg |
| 333 |
|
{ |
| 334 |
|
template<typename CharT> |
| 335 |
|
class lexical_streambuf : public std::basic_streambuf<CharT> |
| 336 |
|
{ |
| 337 |
|
public: |
| 338 |
|
void setbuf(CharT* start, CharT* finish) |
| 339 |
|
{ |
| 340 |
|
this->setg(start, start, finish); |
| 341 |
|
} |
| 342 |
|
}; |
| 343 |
|
} |
| 344 |
|
|
| 345 |
|
namespace detail // lcast_to_unsigned |
| 346 |
|
{ |
| 347 |
|
#if (defined _MSC_VER) |
| 348 |
|
# pragma warning( push ) |
| 349 |
|
// C4146: unary minus operator applied to unsigned type, result still unsigned |
| 350 |
|
# pragma warning( disable : 4146 ) |
| 351 |
|
#endif |
| 352 |
|
|
| 353 |
|
inline unsigned int lcast_to_unsigned(int value) |
| 354 |
|
{ |
| 355 |
|
unsigned int uval = value; |
| 356 |
|
return value < 0 ? -uval : uval; |
| 357 |
|
} |
| 358 |
|
|
| 359 |
|
inline unsigned long lcast_to_unsigned(long value) |
| 360 |
|
{ |
| 361 |
|
unsigned long uval = value; |
| 362 |
|
return value < 0 ? -uval : uval; |
| 363 |
|
} |
| 364 |
|
|
| 365 |
|
#if defined(BOOST_HAS_LONG_LONG) |
| 366 |
|
inline boost::ulong_long_type lcast_to_unsigned(boost::long_long_type v) |
| 367 |
|
{ |
| 368 |
|
boost::ulong_long_type uval = v; |
| 369 |
|
return v < 0 ? -uval : uval; |
| 370 |
|
} |
| 371 |
|
#elif defined(BOOST_HAS_MS_INT64) |
| 372 |
|
inline unsigned __int64 lcast_to_unsigned(__int64 value) |
| 373 |
|
{ |
| 374 |
|
unsigned __int64 uval = value; |
| 375 |
|
return value < 0 ? -uval : uval; |
| 376 |
|
} |
| 377 |
|
#endif |
| 378 |
|
|
| 379 |
|
#if (defined _MSC_VER) |
| 380 |
|
# pragma warning( pop ) // C4146: unary minus operator applied to unsigned type, result still unsigned |
| 381 |
|
#endif |
| 382 |
|
} |
| 383 |
|
|
| 384 |
|
namespace detail // lcast_put_unsigned |
| 385 |
|
{ |
| 386 |
|
// I'd personally put lcast_put_unsigned in .cpp file if not |
| 387 |
|
// boost practice for header-only libraries (Alexander Nasonov). |
| 388 |
|
template<typename T, typename CharT> |
| 389 |
|
CharT* lcast_put_unsigned(T n, CharT* finish) |
| 390 |
|
{ |
| 391 |
|
typedef std::numpunct<CharT> numpunct; |
| 392 |
|
|
| 393 |
|
CharT thousands_sep = 0; |
| 394 |
|
|
| 395 |
|
#if !defined(MEASURE_LEXICAL_CAST_PERFORMANCE_WITHOUT_LOCALE_OVERHEAD) |
| 396 |
|
std::locale loc; |
| 397 |
|
numpunct const& np = BOOST_USE_FACET(numpunct, loc); |
| 398 |
|
std::string const& grouping = np.grouping(); |
| 399 |
|
std::string::size_type const grouping_size = grouping.size(); |
| 400 |
|
|
| 401 |
|
if(grouping_size) |
| 402 |
|
thousands_sep = np.thousands_sep(); |
| 403 |
|
#else // dead branch in production code |
| 404 |
|
char const* grouping = ""; |
| 405 |
|
std::size_t grouping_size = 0; |
| 406 |
|
#endif |
| 407 |
|
|
| 408 |
|
std::string::size_type group = 0; // current group number |
| 409 |
|
char last_grp_size = grouping[0] <= 0 ? CHAR_MAX : grouping[0]; |
| 410 |
|
// a) Since grouping is const, grouping[grouping.size()] returns 0. |
| 411 |
|
// b) It's safe to assume here and below that CHAR_MAX |
| 412 |
|
// is equivalent to unlimited grouping: |
| 413 |
|
#if !defined(__BORLANDC__) || __BORLANDC__ >= 0x581 |
| 414 |
|
BOOST_STATIC_ASSERT(std::numeric_limits<T>::digits10 < CHAR_MAX); |
| 415 |
|
#endif |
| 416 |
|
|
| 417 |
|
char left = last_grp_size; |
| 418 |
|
|
| 419 |
|
do |
| 420 |
|
{ |
| 421 |
|
if(left == 0) |
| 422 |
|
{ |
| 423 |
|
++group; |
| 424 |
|
if(group < grouping_size) |
| 425 |
|
{ |
| 426 |
|
char const grp_size = grouping[group]; |
| 427 |
|
last_grp_size = grp_size <= 0 ? CHAR_MAX : grp_size; |
| 428 |
|
} |
| 429 |
|
|
| 430 |
|
left = last_grp_size; |
| 431 |
|
--finish; |
| 432 |
|
*finish = thousands_sep; |
| 433 |
|
} |
| 434 |
|
|
| 435 |
|
--left; |
| 436 |
|
--finish; |
| 437 |
|
int const digit = n % 10; |
| 438 |
|
int const cdigit = digit + lcast_char_constants<CharT>::zero; |
| 439 |
|
*finish = static_cast<char>(cdigit); |
| 440 |
|
n /= 10; |
| 441 |
|
} while(n); |
| 442 |
|
|
| 443 |
|
return finish; |
| 444 |
|
} |
| 445 |
|
} |
| 446 |
|
|
| 447 |
namespace detail // stream wrapper for handling lexical conversions |
namespace detail // stream wrapper for handling lexical conversions |
| 448 |
{ |
{ |
| 449 |
template<typename Target, typename Source> |
template<typename Target, typename Source> |
| 455 |
typename stream_char<Source>::type>::type char_type; |
typename stream_char<Source>::type>::type char_type; |
| 456 |
|
|
| 457 |
public: |
public: |
| 458 |
lexical_stream() |
lexical_stream(char_type* = 0, char_type* = 0) |
| 459 |
{ |
{ |
| 460 |
stream.unsetf(std::ios::skipws); |
stream.unsetf(std::ios::skipws); |
| 461 |
|
|
| 509 |
#if defined(BOOST_NO_STRINGSTREAM) |
#if defined(BOOST_NO_STRINGSTREAM) |
| 510 |
stream << '\0'; |
stream << '\0'; |
| 511 |
#endif |
#endif |
| 512 |
output = stream.str(); |
stream.str().swap(output); |
| 513 |
return true; |
return true; |
| 514 |
} |
} |
| 515 |
#ifndef DISABLE_WIDE_CHAR_SUPPORT |
#ifndef DISABLE_WIDE_CHAR_SUPPORT |
| 516 |
bool operator>>(std::wstring &output) |
bool operator>>(std::wstring &output) |
| 517 |
{ |
{ |
| 518 |
output = stream.str(); |
stream.str().swap(output); |
| 519 |
return true; |
return true; |
| 520 |
} |
} |
| 521 |
#endif |
#endif |
| 530 |
}; |
}; |
| 531 |
} |
} |
| 532 |
|
|
| 533 |
|
namespace detail // optimized stream wrapper |
| 534 |
|
{ |
| 535 |
|
// String representation of Source has an upper limit. |
| 536 |
|
template<typename CharT> |
| 537 |
|
class lexical_stream_limited_src |
| 538 |
|
{ |
| 539 |
|
// A string representation of Source is written to [start, finish). |
| 540 |
|
// Currently, it is assumed that [start, finish) is big enough |
| 541 |
|
// to hold a string representation of any Source value. |
| 542 |
|
CharT* start; |
| 543 |
|
CharT* finish; |
| 544 |
|
|
| 545 |
|
private: |
| 546 |
|
|
| 547 |
|
static void widen_and_assign(char*p, char ch) |
| 548 |
|
{ |
| 549 |
|
*p = ch; |
| 550 |
|
} |
| 551 |
|
|
| 552 |
|
#ifndef DISABLE_WIDE_CHAR_SUPPORT |
| 553 |
|
static void widen_and_assign(wchar_t* p, char ch) |
| 554 |
|
{ |
| 555 |
|
std::locale loc; |
| 556 |
|
*p = BOOST_USE_FACET(std::ctype<wchar_t>, loc).widen(ch); |
| 557 |
|
} |
| 558 |
|
|
| 559 |
|
static void widen_and_assign(wchar_t* p, wchar_t ch) |
| 560 |
|
{ |
| 561 |
|
*p = ch; |
| 562 |
|
} |
| 563 |
|
|
| 564 |
|
static void widen_and_assign(char*, wchar_t ch); // undefined |
| 565 |
|
#endif |
| 566 |
|
|
| 567 |
|
// Undefined: |
| 568 |
|
lexical_stream_limited_src(lexical_stream_limited_src const&); |
| 569 |
|
void operator=(lexical_stream_limited_src const&); |
| 570 |
|
|
| 571 |
|
public: |
| 572 |
|
|
| 573 |
|
lexical_stream_limited_src(CharT* start, CharT* finish) |
| 574 |
|
: start(start) |
| 575 |
|
, finish(finish) |
| 576 |
|
{} |
| 577 |
|
|
| 578 |
|
public: // output |
| 579 |
|
|
| 580 |
|
template<class Traits, class Alloc> |
| 581 |
|
bool operator<<(std::basic_string<CharT, Traits, Alloc> const& str) |
| 582 |
|
{ |
| 583 |
|
start = const_cast<CharT*>(str.data()); |
| 584 |
|
finish = start + str.length(); |
| 585 |
|
return true; |
| 586 |
|
} |
| 587 |
|
|
| 588 |
|
bool operator<<(bool); |
| 589 |
|
bool operator<<(char); |
| 590 |
|
#if !defined(DISABLE_WIDE_CHAR_SUPPORT) && !defined(BOOST_NO_INTRINSIC_WCHAR_T) |
| 591 |
|
bool operator<<(wchar_t); |
| 592 |
|
#endif |
| 593 |
|
bool operator<<(CharT const*); |
| 594 |
|
bool operator<<(short); |
| 595 |
|
bool operator<<(int); |
| 596 |
|
bool operator<<(long); |
| 597 |
|
bool operator<<(unsigned short); |
| 598 |
|
bool operator<<(unsigned int); |
| 599 |
|
bool operator<<(unsigned long); |
| 600 |
|
#if defined(BOOST_HAS_LONG_LONG) |
| 601 |
|
bool operator<<(boost::ulong_long_type); |
| 602 |
|
bool operator<<(boost::long_long_type ); |
| 603 |
|
#elif defined(BOOST_HAS_MS_INT64) |
| 604 |
|
bool operator<<(unsigned __int64); |
| 605 |
|
bool operator<<( __int64); |
| 606 |
|
#endif |
| 607 |
|
|
| 608 |
|
public: // input |
| 609 |
|
|
| 610 |
|
template<typename InputStreamable> |
| 611 |
|
bool operator>>(InputStreamable& output) |
| 612 |
|
{ |
| 613 |
|
#if (defined _MSC_VER) |
| 614 |
|
# pragma warning( push ) |
| 615 |
|
// conditional expression is constant |
| 616 |
|
# pragma warning( disable : 4127 ) |
| 617 |
|
#endif |
| 618 |
|
if(is_pointer<InputStreamable>::value) |
| 619 |
|
return false; |
| 620 |
|
|
| 621 |
|
lexical_streambuf<CharT> sb; |
| 622 |
|
sb.setbuf(start, finish); |
| 623 |
|
|
| 624 |
|
std::basic_istream<CharT> stream(&sb); |
| 625 |
|
stream.unsetf(std::ios::skipws); |
| 626 |
|
|
| 627 |
|
typedef std::numeric_limits<InputStreamable> limits; |
| 628 |
|
|
| 629 |
|
if(limits::is_specialized) |
| 630 |
|
stream.precision(limits::digits10 + 1); |
| 631 |
|
#if (defined _MSC_VER) |
| 632 |
|
# pragma warning( pop ) |
| 633 |
|
#endif |
| 634 |
|
return stream >> output && |
| 635 |
|
stream.get() == |
| 636 |
|
#if defined(__GNUC__) && (__GNUC__<3) && defined(BOOST_NO_STD_WSTRING) |
| 637 |
|
// GCC 2.9x lacks std::char_traits<>::eof(). |
| 638 |
|
// We use BOOST_NO_STD_WSTRING to filter out STLport and libstdc++-v3 |
| 639 |
|
// configurations, which do provide std::char_traits<>::eof(). |
| 640 |
|
|
| 641 |
|
EOF; |
| 642 |
|
#else |
| 643 |
|
std::char_traits<CharT>::eof(); |
| 644 |
|
#endif |
| 645 |
|
} |
| 646 |
|
|
| 647 |
|
bool operator>>(CharT&); |
| 648 |
|
bool operator>>(std::string&); |
| 649 |
|
|
| 650 |
|
#ifndef DISABLE_WIDE_CHAR_SUPPORT |
| 651 |
|
bool operator>>(std::wstring&); |
| 652 |
|
#endif |
| 653 |
|
}; |
| 654 |
|
|
| 655 |
|
template<typename CharT> |
| 656 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<(bool value) |
| 657 |
|
{ |
| 658 |
|
*start = value + lcast_char_constants<CharT>::zero; |
| 659 |
|
finish = start + 1; |
| 660 |
|
return true; |
| 661 |
|
} |
| 662 |
|
|
| 663 |
|
template<typename CharT> |
| 664 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<(char ch) |
| 665 |
|
{ |
| 666 |
|
widen_and_assign(start, ch); |
| 667 |
|
finish = start + 1; |
| 668 |
|
return true; |
| 669 |
|
} |
| 670 |
|
|
| 671 |
|
#if !defined(DISABLE_WIDE_CHAR_SUPPORT) && !defined(BOOST_NO_INTRINSIC_WCHAR_T) |
| 672 |
|
template<typename CharT> |
| 673 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<(wchar_t ch) |
| 674 |
|
{ |
| 675 |
|
widen_and_assign(start, ch); |
| 676 |
|
finish = start + 1; |
| 677 |
|
return true; |
| 678 |
|
} |
| 679 |
|
#endif |
| 680 |
|
|
| 681 |
|
template<typename CharT> |
| 682 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<(short n) |
| 683 |
|
{ |
| 684 |
|
start = lcast_put_unsigned(lcast_to_unsigned(n), finish); |
| 685 |
|
if(n < 0) |
| 686 |
|
*--start = lcast_char_constants<CharT>::minus; |
| 687 |
|
return true; |
| 688 |
|
} |
| 689 |
|
|
| 690 |
|
template<typename CharT> |
| 691 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<(int n) |
| 692 |
|
{ |
| 693 |
|
start = lcast_put_unsigned(lcast_to_unsigned(n), finish); |
| 694 |
|
if(n < 0) |
| 695 |
|
*--start = lcast_char_constants<CharT>::minus; |
| 696 |
|
return true; |
| 697 |
|
} |
| 698 |
|
|
| 699 |
|
template<typename CharT> |
| 700 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<(long n) |
| 701 |
|
{ |
| 702 |
|
start = lcast_put_unsigned(lcast_to_unsigned(n), finish); |
| 703 |
|
if(n < 0) |
| 704 |
|
*--start = lcast_char_constants<CharT>::minus; |
| 705 |
|
return true; |
| 706 |
|
} |
| 707 |
|
|
| 708 |
|
#if defined(BOOST_HAS_LONG_LONG) |
| 709 |
|
template<typename CharT> |
| 710 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<( |
| 711 |
|
boost::long_long_type n) |
| 712 |
|
{ |
| 713 |
|
start = lcast_put_unsigned(lcast_to_unsigned(n), finish); |
| 714 |
|
if(n < 0) |
| 715 |
|
*--start = lcast_char_constants<CharT>::minus; |
| 716 |
|
return true; |
| 717 |
|
} |
| 718 |
|
#elif defined(BOOST_HAS_MS_INT64) |
| 719 |
|
template<typename CharT> |
| 720 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<(__int64 n) |
| 721 |
|
{ |
| 722 |
|
start = lcast_put_unsigned(lcast_to_unsigned(n), finish); |
| 723 |
|
if(n < 0) |
| 724 |
|
*--start = lcast_char_constants<CharT>::minus; |
| 725 |
|
return true; |
| 726 |
|
} |
| 727 |
|
#endif |
| 728 |
|
|
| 729 |
|
template<typename CharT> |
| 730 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<( |
| 731 |
|
unsigned short n) |
| 732 |
|
{ |
| 733 |
|
start = lcast_put_unsigned(+n, finish); |
| 734 |
|
return true; |
| 735 |
|
} |
| 736 |
|
|
| 737 |
|
template<typename CharT> |
| 738 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<( |
| 739 |
|
unsigned int n) |
| 740 |
|
{ |
| 741 |
|
start = lcast_put_unsigned(n, finish); |
| 742 |
|
return true; |
| 743 |
|
} |
| 744 |
|
|
| 745 |
|
template<typename CharT> |
| 746 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<( |
| 747 |
|
unsigned long n) |
| 748 |
|
{ |
| 749 |
|
start = lcast_put_unsigned(n, finish); |
| 750 |
|
return true; |
| 751 |
|
} |
| 752 |
|
|
| 753 |
|
#if defined(BOOST_HAS_LONG_LONG) |
| 754 |
|
template<typename CharT> |
| 755 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<( |
| 756 |
|
boost::ulong_long_type n) |
| 757 |
|
{ |
| 758 |
|
start = lcast_put_unsigned(n, finish); |
| 759 |
|
return true; |
| 760 |
|
} |
| 761 |
|
#elif defined(BOOST_HAS_MS_INT64) |
| 762 |
|
template<typename CharT> |
| 763 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<( |
| 764 |
|
unsigned __int64 n) |
| 765 |
|
{ |
| 766 |
|
start = lcast_put_unsigned(n, finish); |
| 767 |
|
return true; |
| 768 |
|
} |
| 769 |
|
#endif |
| 770 |
|
|
| 771 |
|
template<typename CharT> |
| 772 |
|
inline bool lexical_stream_limited_src<CharT>::operator<<( |
| 773 |
|
CharT const* str) |
| 774 |
|
{ |
| 775 |
|
start = const_cast<CharT*>(str); |
| 776 |
|
finish = start + std::char_traits<CharT>::length(str); |
| 777 |
|
return true; |
| 778 |
|
} |
| 779 |
|
|
| 780 |
|
template<typename CharT> |
| 781 |
|
inline bool lexical_stream_limited_src<CharT>::operator>>(CharT& output) |
| 782 |
|
{ |
| 783 |
|
bool const ok = (finish - start == 1); |
| 784 |
|
if(ok) |
| 785 |
|
output = *start; |
| 786 |
|
return ok; |
| 787 |
|
} |
| 788 |
|
|
| 789 |
|
template<typename CharT> |
| 790 |
|
inline bool lexical_stream_limited_src<CharT>::operator>>( |
| 791 |
|
std::string& str) |
| 792 |
|
{ |
| 793 |
|
str.assign(start, finish); |
| 794 |
|
return true; |
| 795 |
|
} |
| 796 |
|
|
| 797 |
|
#ifndef DISABLE_WIDE_CHAR_SUPPORT |
| 798 |
|
template<typename CharT> |
| 799 |
|
inline bool lexical_stream_limited_src<CharT>::operator>>( |
| 800 |
|
std::wstring& str) |
| 801 |
|
{ |
| 802 |
|
str.assign(start, finish); |
| 803 |
|
return true; |
| 804 |
|
} |
| 805 |
|
#endif |
| 806 |
|
} |
| 807 |
|
|
| 808 |
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
| 809 |
|
|
| 810 |
// call-by-const reference version |
// call-by-const reference version |
| 823 |
typedef const T * type; |
typedef const T * type; |
| 824 |
}; |
}; |
| 825 |
|
|
| 826 |
template<typename Target, typename Source> |
template< typename Target |
| 827 |
|
, typename Source |
| 828 |
|
, bool Unlimited // string representation of Source is unlimited |
| 829 |
|
, typename CharT |
| 830 |
|
> |
| 831 |
Target lexical_cast( |
Target lexical_cast( |
| 832 |
BOOST_DEDUCED_TYPENAME boost::call_traits<Source>::value_type arg) |
BOOST_DEDUCED_TYPENAME boost::call_traits<Source>::value_type arg, |
| 833 |
|
CharT* buf, std::size_t src_len) |
| 834 |
{ |
{ |
| 835 |
|
BOOST_DEDUCED_TYPENAME mpl::if_c< |
| 836 |
detail::lexical_stream<Target, Source> interpreter; |
Unlimited |
| 837 |
|
, detail::lexical_stream<Target, Source> |
| 838 |
|
, detail::lexical_stream_limited_src<CharT> |
| 839 |
|
>::type interpreter(buf, buf + src_len); |
| 840 |
|
|
| 841 |
// The original form, reproduced below, is more elegant |
// The original form, reproduced below, is more elegant |
| 842 |
// but yields a spurious C4701 warning ("possible use of |
// but yields a spurious C4701 warning ("possible use of |
| 861 |
template<typename Target, typename Source> |
template<typename Target, typename Source> |
| 862 |
inline Target lexical_cast(const Source &arg) |
inline Target lexical_cast(const Source &arg) |
| 863 |
{ |
{ |
| 864 |
typedef typename detail::array_to_pointer_decay<Source>::type NewSource; |
typedef typename detail::array_to_pointer_decay<Source>::type src; |
| 865 |
return detail::lexical_cast<Target, NewSource>(arg); |
|
| 866 |
|
typedef typename detail::widest_char< |
| 867 |
|
typename detail::stream_char<Target>::type |
| 868 |
|
, typename detail::stream_char<src>::type |
| 869 |
|
>::type char_type; |
| 870 |
|
|
| 871 |
|
typedef detail::lcast_src_length<char_type, src> lcast_src_length; |
| 872 |
|
std::size_t const src_len = lcast_src_length::value; |
| 873 |
|
char_type buf[src_len + 1]; |
| 874 |
|
lcast_src_length::check_coverage(); |
| 875 |
|
return detail::lexical_cast<Target, src, !src_len>(arg, buf, src_len); |
| 876 |
} |
} |
| 877 |
|
|
| 878 |
#else |
#else |
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