diff options
Diffstat (limited to 'src/stdexcept.cpp')
| -rw-r--r-- | src/stdexcept.cpp | 122 |
1 files changed, 14 insertions, 108 deletions
diff --git a/src/stdexcept.cpp b/src/stdexcept.cpp index a4207d6058ff..aff4b1850d36 100644 --- a/src/stdexcept.cpp +++ b/src/stdexcept.cpp @@ -7,123 +7,42 @@ // //===----------------------------------------------------------------------===// +#include "__refstring" #include "stdexcept" #include "new" #include "string" -#include <cstdlib> -#include <cstring> -#include <cstdint> -#include <cstddef> #include "system_error" #ifndef __has_include #define __has_include(inc) 0 #endif -#ifdef __APPLE__ +/* For _LIBCPPABI_VERSION */ +#if __has_include(<cxxabi.h>) || defined(__APPLE_) || defined(LIBCXXRT) #include <cxxabi.h> -#elif defined(LIBCXXRT) || __has_include(<cxxabi.h>) -#include <cxxabi.h> -#endif - -// Note: optimize for size - -#if ! defined(_LIBCPP_MSVC) -#pragma GCC visibility push(hidden) #endif -namespace -{ - -class __libcpp_nmstr -{ -private: - const char* str_; - - typedef std::size_t unused_t; - typedef std::ptrdiff_t count_t; - - static const std::ptrdiff_t offset = static_cast<std::ptrdiff_t>(2*sizeof(unused_t) + - sizeof(count_t)); - - count_t& count() const _NOEXCEPT {return (count_t&)(*(str_ - sizeof(count_t)));} -public: - explicit __libcpp_nmstr(const char* msg); - __libcpp_nmstr(const __libcpp_nmstr& s) _NOEXCEPT; - __libcpp_nmstr& operator=(const __libcpp_nmstr& s) _NOEXCEPT; - ~__libcpp_nmstr(); - const char* c_str() const _NOEXCEPT {return str_;} -}; - -__libcpp_nmstr::__libcpp_nmstr(const char* msg) -{ - std::size_t len = strlen(msg); - str_ = new char[len + 1 + offset]; - unused_t* c = (unused_t*)str_; - c[0] = c[1] = len; - str_ += offset; - count() = 0; - std::memcpy(const_cast<char*>(c_str()), msg, len + 1); -} - -inline -__libcpp_nmstr::__libcpp_nmstr(const __libcpp_nmstr& s) _NOEXCEPT - : str_(s.str_) -{ - __sync_add_and_fetch(&count(), 1); -} - -__libcpp_nmstr& -__libcpp_nmstr::operator=(const __libcpp_nmstr& s) _NOEXCEPT -{ - const char* p = str_; - str_ = s.str_; - __sync_add_and_fetch(&count(), 1); - if (__sync_add_and_fetch((count_t*)(p-sizeof(count_t)), count_t(-1)) < 0) - delete [] (p-offset); - return *this; -} - -inline -__libcpp_nmstr::~__libcpp_nmstr() -{ - if (__sync_add_and_fetch(&count(), count_t(-1)) < 0) - delete [] (str_ - offset); -} - -} - -#if ! defined(_LIBCPP_MSVC) -#pragma GCC visibility pop -#endif +static_assert(sizeof(std::__libcpp_refstring) == sizeof(const char *), ""); namespace std // purposefully not using versioning namespace { -logic_error::logic_error(const string& msg) +logic_error::logic_error(const string& msg) : __imp_(msg.c_str()) { - __libcpp_nmstr& s = (__libcpp_nmstr&)__imp_; - ::new(&s) __libcpp_nmstr(msg.c_str()); } -logic_error::logic_error(const char* msg) +logic_error::logic_error(const char* msg) : __imp_(msg) { - __libcpp_nmstr& s = (__libcpp_nmstr&)__imp_; - ::new(&s) __libcpp_nmstr(msg); } -logic_error::logic_error(const logic_error& le) _NOEXCEPT +logic_error::logic_error(const logic_error& le) _NOEXCEPT : __imp_(le.__imp_) { - __libcpp_nmstr& s = (__libcpp_nmstr&)__imp_; - ::new(&s) __libcpp_nmstr((const __libcpp_nmstr&)le.__imp_); } logic_error& logic_error::operator=(const logic_error& le) _NOEXCEPT { - __libcpp_nmstr& s1 = (__libcpp_nmstr&)__imp_; - const __libcpp_nmstr& s2 = (const __libcpp_nmstr&)le.__imp_; - s1 = s2; + __imp_ = le.__imp_; return *this; } @@ -131,43 +50,33 @@ logic_error::operator=(const logic_error& le) _NOEXCEPT logic_error::~logic_error() _NOEXCEPT { - __libcpp_nmstr& s = (__libcpp_nmstr&)__imp_; - s.~__libcpp_nmstr(); } const char* logic_error::what() const _NOEXCEPT { - __libcpp_nmstr& s = (__libcpp_nmstr&)__imp_; - return s.c_str(); + return __imp_.c_str(); } #endif -runtime_error::runtime_error(const string& msg) +runtime_error::runtime_error(const string& msg) : __imp_(msg.c_str()) { - __libcpp_nmstr& s = (__libcpp_nmstr&)__imp_; - ::new(&s) __libcpp_nmstr(msg.c_str()); } -runtime_error::runtime_error(const char* msg) +runtime_error::runtime_error(const char* msg) : __imp_(msg) { - __libcpp_nmstr& s = (__libcpp_nmstr&)__imp_; - ::new(&s) __libcpp_nmstr(msg); } runtime_error::runtime_error(const runtime_error& le) _NOEXCEPT + : __imp_(le.__imp_) { - __libcpp_nmstr& s = (__libcpp_nmstr&)__imp_; - ::new(&s) __libcpp_nmstr((const __libcpp_nmstr&)le.__imp_); } runtime_error& runtime_error::operator=(const runtime_error& le) _NOEXCEPT { - __libcpp_nmstr& s1 = (__libcpp_nmstr&)__imp_; - const __libcpp_nmstr& s2 = (const __libcpp_nmstr&)le.__imp_; - s1 = s2; + __imp_ = le.__imp_; return *this; } @@ -175,15 +84,12 @@ runtime_error::operator=(const runtime_error& le) _NOEXCEPT runtime_error::~runtime_error() _NOEXCEPT { - __libcpp_nmstr& s = (__libcpp_nmstr&)__imp_; - s.~__libcpp_nmstr(); } const char* runtime_error::what() const _NOEXCEPT { - __libcpp_nmstr& s = (__libcpp_nmstr&)__imp_; - return s.c_str(); + return __imp_.c_str(); } domain_error::~domain_error() _NOEXCEPT {} |