diff options
Diffstat (limited to 'contrib/llvm-project/libcxx/src/strstream.cpp')
| -rw-r--r-- | contrib/llvm-project/libcxx/src/strstream.cpp | 475 |
1 files changed, 199 insertions, 276 deletions
diff --git a/contrib/llvm-project/libcxx/src/strstream.cpp b/contrib/llvm-project/libcxx/src/strstream.cpp index ae66806833aa..70374191c6ab 100644 --- a/contrib/llvm-project/libcxx/src/strstream.cpp +++ b/contrib/llvm-project/libcxx/src/strstream.cpp @@ -1,4 +1,4 @@ -//===------------------------ strstream.cpp -------------------------------===// +//===----------------------------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. @@ -6,330 +6,253 @@ // //===----------------------------------------------------------------------===// -#include "strstream" -#include "algorithm" -#include "climits" -#include "cstring" -#include "cstdlib" -#include "__debug" -#include "__undef_macros" +#include <__assert> +#include <__utility/unreachable.h> +#include <algorithm> +#include <climits> +#include <cstdlib> +#include <cstring> +#include <strstream> + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> _LIBCPP_BEGIN_NAMESPACE_STD strstreambuf::strstreambuf(streamsize __alsize) - : __strmode_(__dynamic), - __alsize_(__alsize), - __palloc_(nullptr), - __pfree_(nullptr) -{ -} + : __strmode_(__dynamic), __alsize_(__alsize), __palloc_(nullptr), __pfree_(nullptr) {} strstreambuf::strstreambuf(void* (*__palloc)(size_t), void (*__pfree)(void*)) - : __strmode_(__dynamic), - __alsize_(__default_alsize), - __palloc_(__palloc), - __pfree_(__pfree) -{ -} + : __strmode_(__dynamic), __alsize_(__default_alsize), __palloc_(__palloc), __pfree_(__pfree) {} -void -strstreambuf::__init(char* __gnext, streamsize __n, char* __pbeg) -{ - if (__n == 0) - __n = static_cast<streamsize>(strlen(__gnext)); - else if (__n < 0) - __n = INT_MAX; - if (__pbeg == nullptr) - setg(__gnext, __gnext, __gnext + __n); - else - { - setg(__gnext, __gnext, __pbeg); - setp(__pbeg, __pbeg + __n); - } +void strstreambuf::__init(char* __gnext, streamsize __n, char* __pbeg) { + if (__n == 0) + __n = static_cast<streamsize>(strlen(__gnext)); + else if (__n < 0) + __n = INT_MAX; + if (__pbeg == nullptr) + setg(__gnext, __gnext, __gnext + __n); + else { + setg(__gnext, __gnext, __pbeg); + setp(__pbeg, __pbeg + __n); + } } strstreambuf::strstreambuf(char* __gnext, streamsize __n, char* __pbeg) - : __strmode_(), - __alsize_(__default_alsize), - __palloc_(nullptr), - __pfree_(nullptr) -{ - __init(__gnext, __n, __pbeg); + : __strmode_(), __alsize_(__default_alsize), __palloc_(nullptr), __pfree_(nullptr) { + __init(__gnext, __n, __pbeg); } strstreambuf::strstreambuf(const char* __gnext, streamsize __n) - : __strmode_(__constant), - __alsize_(__default_alsize), - __palloc_(nullptr), - __pfree_(nullptr) -{ - __init(const_cast<char *>(__gnext), __n, nullptr); + : __strmode_(__constant), __alsize_(__default_alsize), __palloc_(nullptr), __pfree_(nullptr) { + __init(const_cast<char*>(__gnext), __n, nullptr); } strstreambuf::strstreambuf(signed char* __gnext, streamsize __n, signed char* __pbeg) - : __strmode_(), - __alsize_(__default_alsize), - __palloc_(nullptr), - __pfree_(nullptr) -{ - __init(const_cast<char *>(reinterpret_cast<const char*>(__gnext)), __n, reinterpret_cast<char*>(__pbeg)); + : __strmode_(), __alsize_(__default_alsize), __palloc_(nullptr), __pfree_(nullptr) { + __init(const_cast<char*>(reinterpret_cast<const char*>(__gnext)), __n, reinterpret_cast<char*>(__pbeg)); } strstreambuf::strstreambuf(const signed char* __gnext, streamsize __n) - : __strmode_(__constant), - __alsize_(__default_alsize), - __palloc_(nullptr), - __pfree_(nullptr) -{ - __init(const_cast<char *>(reinterpret_cast<const char*>(__gnext)), __n, nullptr); + : __strmode_(__constant), __alsize_(__default_alsize), __palloc_(nullptr), __pfree_(nullptr) { + __init(const_cast<char*>(reinterpret_cast<const char*>(__gnext)), __n, nullptr); } strstreambuf::strstreambuf(unsigned char* __gnext, streamsize __n, unsigned char* __pbeg) - : __strmode_(), - __alsize_(__default_alsize), - __palloc_(nullptr), - __pfree_(nullptr) -{ - __init(const_cast<char *>(reinterpret_cast<const char*>(__gnext)), __n, reinterpret_cast<char*>(__pbeg)); + : __strmode_(), __alsize_(__default_alsize), __palloc_(nullptr), __pfree_(nullptr) { + __init(const_cast<char*>(reinterpret_cast<const char*>(__gnext)), __n, reinterpret_cast<char*>(__pbeg)); } strstreambuf::strstreambuf(const unsigned char* __gnext, streamsize __n) - : __strmode_(__constant), - __alsize_(__default_alsize), - __palloc_(nullptr), - __pfree_(nullptr) -{ - __init(const_cast<char *>(reinterpret_cast<const char*>(__gnext)), __n, nullptr); + : __strmode_(__constant), __alsize_(__default_alsize), __palloc_(nullptr), __pfree_(nullptr) { + __init(const_cast<char*>(reinterpret_cast<const char*>(__gnext)), __n, nullptr); } -strstreambuf::~strstreambuf() -{ - if (eback() && (__strmode_ & __allocated) != 0 && (__strmode_ & __frozen) == 0) - { - if (__pfree_) - __pfree_(eback()); - else - delete [] eback(); - } -} - -void -strstreambuf::swap(strstreambuf& __rhs) -{ - streambuf::swap(__rhs); - _VSTD::swap(__strmode_, __rhs.__strmode_); - _VSTD::swap(__alsize_, __rhs.__alsize_); - _VSTD::swap(__palloc_, __rhs.__palloc_); - _VSTD::swap(__pfree_, __rhs.__pfree_); +strstreambuf::~strstreambuf() { + if (eback() && (__strmode_ & __allocated) != 0 && (__strmode_ & __frozen) == 0) { + if (__pfree_) + __pfree_(eback()); + else + delete[] eback(); + } } -void -strstreambuf::freeze(bool __freezefl) -{ - if (__strmode_ & __dynamic) - { - if (__freezefl) - __strmode_ |= __frozen; - else - __strmode_ &= ~__frozen; - } +void strstreambuf::swap(strstreambuf& __rhs) { + streambuf::swap(__rhs); + std::swap(__strmode_, __rhs.__strmode_); + std::swap(__alsize_, __rhs.__alsize_); + std::swap(__palloc_, __rhs.__palloc_); + std::swap(__pfree_, __rhs.__pfree_); } -char* -strstreambuf::str() -{ - if (__strmode_ & __dynamic) - __strmode_ |= __frozen; - return eback(); +void strstreambuf::freeze(bool __freezefl) { + if (__strmode_ & __dynamic) { + if (__freezefl) + __strmode_ |= __frozen; + else + __strmode_ &= ~__frozen; + } } -int -strstreambuf::pcount() const -{ - return static_cast<int>(pptr() - pbase()); +char* strstreambuf::str() { + if (__strmode_ & __dynamic) + __strmode_ |= __frozen; + return eback(); } -strstreambuf::int_type -strstreambuf::overflow(int_type __c) -{ - if (__c == EOF) - return int_type(0); - if (pptr() == epptr()) - { - if ((__strmode_ & __dynamic) == 0 || (__strmode_ & __frozen) != 0) - return int_type(EOF); - size_t old_size = static_cast<size_t> ((epptr() ? epptr() : egptr()) - eback()); - size_t new_size = max<size_t>(static_cast<size_t>(__alsize_), 2*old_size); - if (new_size == 0) - new_size = __default_alsize; - char* buf = nullptr; - if (__palloc_) - buf = static_cast<char*>(__palloc_(new_size)); - else - buf = new char[new_size]; - if (buf == nullptr) - return int_type(EOF); - if (old_size != 0) { - _LIBCPP_ASSERT(eback(), "overflow copying from NULL"); - memcpy(buf, eback(), static_cast<size_t>(old_size)); - } - ptrdiff_t ninp = gptr() - eback(); - ptrdiff_t einp = egptr() - eback(); - ptrdiff_t nout = pptr() - pbase(); - if (__strmode_ & __allocated) - { - if (__pfree_) - __pfree_(eback()); - else - delete [] eback(); - } - setg(buf, buf + ninp, buf + einp); - setp(buf + einp, buf + new_size); - __pbump(nout); - __strmode_ |= __allocated; - } - *pptr() = static_cast<char>(__c); - pbump(1); - return int_type(static_cast<unsigned char>(__c)); -} +int strstreambuf::pcount() const { return static_cast<int>(pptr() - pbase()); } -strstreambuf::int_type -strstreambuf::pbackfail(int_type __c) -{ - if (eback() == gptr()) - return EOF; - if (__c == EOF) - { - gbump(-1); - return int_type(0); +strstreambuf::int_type strstreambuf::overflow(int_type __c) { + if (__c == EOF) + return int_type(0); + if (pptr() == epptr()) { + if ((__strmode_ & __dynamic) == 0 || (__strmode_ & __frozen) != 0) + return int_type(EOF); + size_t old_size = static_cast<size_t>((epptr() ? epptr() : egptr()) - eback()); + size_t new_size = max<size_t>(static_cast<size_t>(__alsize_), 2 * old_size); + if (new_size == 0) + new_size = __default_alsize; + char* buf = nullptr; + if (__palloc_) + buf = static_cast<char*>(__palloc_(new_size)); + else + buf = new char[new_size]; + if (buf == nullptr) + return int_type(EOF); + if (old_size != 0) { + _LIBCPP_ASSERT_INTERNAL(eback(), "strstreambuf::overflow reallocating but the get area is a null pointer"); + memcpy(buf, eback(), static_cast<size_t>(old_size)); } - if (__strmode_ & __constant) - { - if (gptr()[-1] == static_cast<char>(__c)) - { - gbump(-1); - return __c; - } - return EOF; + ptrdiff_t ninp = gptr() - eback(); + ptrdiff_t einp = egptr() - eback(); + ptrdiff_t nout = pptr() - pbase(); + if (__strmode_ & __allocated) { + if (__pfree_) + __pfree_(eback()); + else + delete[] eback(); } - gbump(-1); - *gptr() = static_cast<char>(__c); - return __c; + setg(buf, buf + ninp, buf + einp); + setp(buf + einp, buf + new_size); + __pbump(nout); + __strmode_ |= __allocated; + } + *pptr() = static_cast<char>(__c); + pbump(1); + return int_type(static_cast<unsigned char>(__c)); } -strstreambuf::int_type -strstreambuf::underflow() -{ - if (gptr() == egptr()) - { - if (egptr() >= pptr()) - return EOF; - setg(eback(), gptr(), pptr()); +strstreambuf::int_type strstreambuf::pbackfail(int_type __c) { + if (eback() == gptr()) + return EOF; + if (__c == EOF) { + gbump(-1); + return int_type(0); + } + if (__strmode_ & __constant) { + if (gptr()[-1] == static_cast<char>(__c)) { + gbump(-1); + return __c; } - return int_type(static_cast<unsigned char>(*gptr())); + return EOF; + } + gbump(-1); + *gptr() = static_cast<char>(__c); + return __c; } -strstreambuf::pos_type -strstreambuf::seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __which) -{ - off_type __p(-1); - bool pos_in = (__which & ios::in) != 0; - bool pos_out = (__which & ios::out) != 0; - bool legal = false; - switch (__way) - { - case ios::beg: - case ios::end: - if (pos_in || pos_out) - legal = true; - break; - case ios::cur: - if (pos_in != pos_out) - legal = true; - break; - } - if (pos_in && gptr() == nullptr) - legal = false; - if (pos_out && pptr() == nullptr) - legal = false; - if (legal) - { - off_type newoff; - char* seekhigh = epptr() ? epptr() : egptr(); - switch (__way) - { - case ios::beg: - newoff = 0; - break; - case ios::cur: - newoff = (pos_in ? gptr() : pptr()) - eback(); - break; - case ios::end: - newoff = seekhigh - eback(); - break; - default: - _LIBCPP_UNREACHABLE(); - } - newoff += __off; - if (0 <= newoff && newoff <= seekhigh - eback()) - { - char* newpos = eback() + newoff; - if (pos_in) - setg(eback(), newpos, _VSTD::max(newpos, egptr())); - if (pos_out) - { - // min(pbase, newpos), newpos, epptr() - __off = epptr() - newpos; - setp(min(pbase(), newpos), epptr()); - __pbump((epptr() - pbase()) - __off); - } - __p = newoff; - } - } - return pos_type(__p); +strstreambuf::int_type strstreambuf::underflow() { + if (gptr() == egptr()) { + if (egptr() >= pptr()) + return EOF; + setg(eback(), gptr(), pptr()); + } + return int_type(static_cast<unsigned char>(*gptr())); } -strstreambuf::pos_type -strstreambuf::seekpos(pos_type __sp, ios_base::openmode __which) -{ - off_type __p(-1); - bool pos_in = (__which & ios::in) != 0; - bool pos_out = (__which & ios::out) != 0; - if (pos_in || pos_out) - { - if (!((pos_in && gptr() == nullptr) || (pos_out && pptr() == nullptr))) - { - off_type newoff = __sp; - char* seekhigh = epptr() ? epptr() : egptr(); - if (0 <= newoff && newoff <= seekhigh - eback()) - { - char* newpos = eback() + newoff; - if (pos_in) - setg(eback(), newpos, _VSTD::max(newpos, egptr())); - if (pos_out) - { - // min(pbase, newpos), newpos, epptr() - off_type temp = epptr() - newpos; - setp(min(pbase(), newpos), epptr()); - __pbump((epptr() - pbase()) - temp); - } - __p = newoff; - } - } - } - return pos_type(__p); -} +strstreambuf::pos_type strstreambuf::seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __which) { + bool pos_in = (__which & ios::in) != 0; + bool pos_out = (__which & ios::out) != 0; + switch (__way) { + case ios::beg: + case ios::end: + if (!pos_in && !pos_out) + return pos_type(off_type(-1)); + break; + case ios::cur: + if (pos_in == pos_out) + return pos_type(off_type(-1)); + break; + } -istrstream::~istrstream() -{ -} + if (pos_in && gptr() == nullptr) + return pos_type(off_type(-1)); + if (pos_out && pptr() == nullptr) + return pos_type(off_type(-1)); + + off_type newoff; + char* seekhigh = epptr() ? epptr() : egptr(); + switch (__way) { + case ios::beg: + newoff = 0; + break; + case ios::cur: + newoff = (pos_in ? gptr() : pptr()) - eback(); + break; + case ios::end: + newoff = seekhigh - eback(); + break; + default: + __libcpp_unreachable(); + } + newoff += __off; + if (newoff < 0 || newoff > seekhigh - eback()) + return pos_type(off_type(-1)); -ostrstream::~ostrstream() -{ + char* newpos = eback() + newoff; + if (pos_in) + setg(eback(), newpos, std::max(newpos, egptr())); + if (pos_out) { + // min(pbase, newpos), newpos, epptr() + __off = epptr() - newpos; + setp(min(pbase(), newpos), epptr()); + __pbump((epptr() - pbase()) - __off); + } + return pos_type(newoff); } -strstream::~strstream() -{ +strstreambuf::pos_type strstreambuf::seekpos(pos_type __sp, ios_base::openmode __which) { + bool pos_in = (__which & ios::in) != 0; + bool pos_out = (__which & ios::out) != 0; + if (!pos_in && !pos_out) + return pos_type(off_type(-1)); + + if ((pos_in && gptr() == nullptr) || (pos_out && pptr() == nullptr)) + return pos_type(off_type(-1)); + + off_type newoff = __sp; + char* seekhigh = epptr() ? epptr() : egptr(); + if (newoff < 0 || newoff > seekhigh - eback()) + return pos_type(off_type(-1)); + + char* newpos = eback() + newoff; + if (pos_in) + setg(eback(), newpos, std::max(newpos, egptr())); + if (pos_out) { + // min(pbase, newpos), newpos, epptr() + off_type temp = epptr() - newpos; + setp(min(pbase(), newpos), epptr()); + __pbump((epptr() - pbase()) - temp); + } + return pos_type(newoff); } +istrstream::~istrstream() {} + +ostrstream::~ostrstream() {} + +strstream::~strstream() {} + _LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS |