1//===-------------------------- ios.cpp -----------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "__config"
11
12#include "ios"
13
14#include <stdlib.h>
15
16#include "__locale"
17#include "algorithm"
18#include "include/config_elast.h"
19#include "istream"
20#include "limits"
21#include "memory"
22#include "new"
23#include "streambuf"
24#include "string"
25
26_LIBCPP_BEGIN_NAMESPACE_STD
27
28template class basic_ios<char>;
29template class basic_ios<wchar_t>;
30
31template class basic_streambuf<char>;
32template class basic_streambuf<wchar_t>;
33
34template class basic_istream<char>;
35template class basic_istream<wchar_t>;
36
37template class basic_ostream<char>;
38template class basic_ostream<wchar_t>;
39
40template class basic_iostream<char>;
41
42class _LIBCPP_HIDDEN __iostream_category
43    : public __do_message
44{
45public:
46    virtual const char* name() const _NOEXCEPT;
47    virtual string message(int ev) const;
48};
49
50const char*
51__iostream_category::name() const _NOEXCEPT
52{
53    return "iostream";
54}
55
56string
57__iostream_category::message(int ev) const
58{
59    if (ev != static_cast<int>(io_errc::stream)
60#ifdef _LIBCPP_ELAST
61        && ev <= _LIBCPP_ELAST
62#endif  // _LIBCPP_ELAST
63        )
64        return __do_message::message(ev);
65    return string("unspecified iostream_category error");
66}
67
68const error_category&
69iostream_category() _NOEXCEPT
70{
71    static __iostream_category s;
72    return s;
73}
74
75// ios_base::failure
76
77ios_base::failure::failure(const string& msg, const error_code& ec)
78    : system_error(ec, msg)
79{
80}
81
82ios_base::failure::failure(const char* msg, const error_code& ec)
83    : system_error(ec, msg)
84{
85}
86
87ios_base::failure::~failure() throw()
88{
89}
90
91// ios_base locale
92
93const ios_base::fmtflags ios_base::boolalpha;
94const ios_base::fmtflags ios_base::dec;
95const ios_base::fmtflags ios_base::fixed;
96const ios_base::fmtflags ios_base::hex;
97const ios_base::fmtflags ios_base::internal;
98const ios_base::fmtflags ios_base::left;
99const ios_base::fmtflags ios_base::oct;
100const ios_base::fmtflags ios_base::right;
101const ios_base::fmtflags ios_base::scientific;
102const ios_base::fmtflags ios_base::showbase;
103const ios_base::fmtflags ios_base::showpoint;
104const ios_base::fmtflags ios_base::showpos;
105const ios_base::fmtflags ios_base::skipws;
106const ios_base::fmtflags ios_base::unitbuf;
107const ios_base::fmtflags ios_base::uppercase;
108const ios_base::fmtflags ios_base::adjustfield;
109const ios_base::fmtflags ios_base::basefield;
110const ios_base::fmtflags ios_base::floatfield;
111
112const ios_base::iostate ios_base::badbit;
113const ios_base::iostate ios_base::eofbit;
114const ios_base::iostate ios_base::failbit;
115const ios_base::iostate ios_base::goodbit;
116
117const ios_base::openmode ios_base::app;
118const ios_base::openmode ios_base::ate;
119const ios_base::openmode ios_base::binary;
120const ios_base::openmode ios_base::in;
121const ios_base::openmode ios_base::out;
122const ios_base::openmode ios_base::trunc;
123
124void
125ios_base::__call_callbacks(event ev)
126{
127    for (size_t i = __event_size_; i;)
128    {
129        --i;
130        __fn_[i](ev, *this, __index_[i]);
131    }
132}
133
134// locale
135
136locale
137ios_base::imbue(const locale& newloc)
138{
139    static_assert(sizeof(locale) == sizeof(__loc_), "");
140    locale& loc_storage = *reinterpret_cast<locale*>(&__loc_);
141    locale oldloc = loc_storage;
142    loc_storage = newloc;
143    __call_callbacks(imbue_event);
144    return oldloc;
145}
146
147locale
148ios_base::getloc() const
149{
150    const locale& loc_storage = *reinterpret_cast<const locale*>(&__loc_);
151    return loc_storage;
152}
153
154// xalloc
155#if defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_NO_THREADS)
156atomic<int> ios_base::__xindex_ = ATOMIC_VAR_INIT(0);
157#else
158int ios_base::__xindex_ = 0;
159#endif
160
161template <typename _Tp>
162static size_t __ios_new_cap(size_t __req_size, size_t __current_cap)
163{ // Precondition: __req_size > __current_cap
164	const size_t mx = std::numeric_limits<size_t>::max() / sizeof(_Tp);
165	if (__req_size < mx/2)
166		return _VSTD::max(2 * __current_cap, __req_size);
167	else
168		return mx;
169}
170
171int
172ios_base::xalloc()
173{
174    return __xindex_++;
175}
176
177long&
178ios_base::iword(int index)
179{
180    size_t req_size = static_cast<size_t>(index)+1;
181    if (req_size > __iarray_cap_)
182    {
183        size_t newcap = __ios_new_cap<long>(req_size, __iarray_cap_);
184        long* iarray = static_cast<long*>(realloc(__iarray_, newcap * sizeof(long)));
185        if (iarray == 0)
186        {
187            setstate(badbit);
188            static long error;
189            error = 0;
190            return error;
191        }
192        __iarray_ = iarray;
193        for (long* p = __iarray_ + __iarray_size_; p < __iarray_ + newcap; ++p)
194            *p = 0;
195        __iarray_cap_ = newcap;
196    }
197    __iarray_size_ = max<size_t>(__iarray_size_, req_size);
198    return __iarray_[index];
199}
200
201void*&
202ios_base::pword(int index)
203{
204    size_t req_size = static_cast<size_t>(index)+1;
205    if (req_size > __parray_cap_)
206    {
207        size_t newcap = __ios_new_cap<void *>(req_size, __iarray_cap_);
208        void** parray = static_cast<void**>(realloc(__parray_, newcap * sizeof(void *)));
209        if (parray == 0)
210        {
211            setstate(badbit);
212            static void* error;
213            error = 0;
214            return error;
215        }
216        __parray_ = parray;
217        for (void** p = __parray_ + __parray_size_; p < __parray_ + newcap; ++p)
218            *p = 0;
219        __parray_cap_ = newcap;
220    }
221    __parray_size_ = max<size_t>(__parray_size_, req_size);
222    return __parray_[index];
223}
224
225// register_callback
226
227void
228ios_base::register_callback(event_callback fn, int index)
229{
230    size_t req_size = __event_size_ + 1;
231    if (req_size > __event_cap_)
232    {
233        size_t newcap = __ios_new_cap<event_callback>(req_size, __event_cap_);
234        event_callback* fns = static_cast<event_callback*>(realloc(__fn_, newcap * sizeof(event_callback)));
235        if (fns == 0)
236            setstate(badbit);
237        __fn_ = fns;
238        int* indxs = static_cast<int *>(realloc(__index_, newcap * sizeof(int)));
239        if (indxs == 0)
240            setstate(badbit);
241        __index_ = indxs;
242        __event_cap_ = newcap;
243    }
244    __fn_[__event_size_] = fn;
245    __index_[__event_size_] = index;
246    ++__event_size_;
247}
248
249ios_base::~ios_base()
250{
251    __call_callbacks(erase_event);
252    locale& loc_storage = *reinterpret_cast<locale*>(&__loc_);
253    loc_storage.~locale();
254    free(__fn_);
255    free(__index_);
256    free(__iarray_);
257    free(__parray_);
258}
259
260// iostate
261
262void
263ios_base::clear(iostate state)
264{
265    if (__rdbuf_)
266        __rdstate_ = state;
267    else
268        __rdstate_ = state | badbit;
269#ifndef _LIBCPP_NO_EXCEPTIONS
270    if (((state | (__rdbuf_ ? goodbit : badbit)) & __exceptions_) != 0)
271        throw failure("ios_base::clear");
272#endif  // _LIBCPP_NO_EXCEPTIONS
273}
274
275// init
276
277void
278ios_base::init(void* sb)
279{
280    __rdbuf_ = sb;
281    __rdstate_ = __rdbuf_ ? goodbit : badbit;
282    __exceptions_ = goodbit;
283    __fmtflags_ = skipws | dec;
284    __width_ = 0;
285    __precision_ = 6;
286    __fn_ = 0;
287    __index_ = 0;
288    __event_size_ = 0;
289    __event_cap_ = 0;
290    __iarray_ = 0;
291    __iarray_size_ = 0;
292    __iarray_cap_ = 0;
293    __parray_ = 0;
294    __parray_size_ = 0;
295    __parray_cap_ = 0;
296    ::new(&__loc_) locale;
297}
298
299void
300ios_base::copyfmt(const ios_base& rhs)
301{
302    // If we can't acquire the needed resources, throw bad_alloc (can't set badbit)
303    // Don't alter *this until all needed resources are acquired
304    unique_ptr<event_callback, void (*)(void*)> new_callbacks(0, free);
305    unique_ptr<int, void (*)(void*)> new_ints(0, free);
306    unique_ptr<long, void (*)(void*)> new_longs(0, free);
307    unique_ptr<void*, void (*)(void*)> new_pointers(0, free);
308    if (__event_cap_ < rhs.__event_size_)
309    {
310        size_t newesize = sizeof(event_callback) * rhs.__event_size_;
311        new_callbacks.reset(static_cast<event_callback*>(malloc(newesize)));
312#ifndef _LIBCPP_NO_EXCEPTIONS
313        if (!new_callbacks)
314            throw bad_alloc();
315#endif  // _LIBCPP_NO_EXCEPTIONS
316
317        size_t newisize = sizeof(int) * rhs.__event_size_;
318        new_ints.reset(static_cast<int *>(malloc(newisize)));
319#ifndef _LIBCPP_NO_EXCEPTIONS
320        if (!new_ints)
321            throw bad_alloc();
322#endif  // _LIBCPP_NO_EXCEPTIONS
323    }
324    if (__iarray_cap_ < rhs.__iarray_size_)
325    {
326        size_t newsize = sizeof(long) * rhs.__iarray_size_;
327        new_longs.reset(static_cast<long*>(malloc(newsize)));
328#ifndef _LIBCPP_NO_EXCEPTIONS
329        if (!new_longs)
330            throw bad_alloc();
331#endif  // _LIBCPP_NO_EXCEPTIONS
332    }
333    if (__parray_cap_ < rhs.__parray_size_)
334    {
335        size_t newsize = sizeof(void*) * rhs.__parray_size_;
336        new_pointers.reset(static_cast<void**>(malloc(newsize)));
337#ifndef _LIBCPP_NO_EXCEPTIONS
338        if (!new_pointers)
339            throw bad_alloc();
340#endif  // _LIBCPP_NO_EXCEPTIONS
341    }
342    // Got everything we need.  Copy everything but __rdstate_, __rdbuf_ and __exceptions_
343    __fmtflags_ = rhs.__fmtflags_;
344    __precision_ = rhs.__precision_;
345    __width_ = rhs.__width_;
346    locale& lhs_loc = *reinterpret_cast<locale*>(&__loc_);
347    const locale& rhs_loc = *reinterpret_cast<const locale*>(&rhs.__loc_);
348    lhs_loc = rhs_loc;
349    if (__event_cap_ < rhs.__event_size_)
350    {
351        free(__fn_);
352        __fn_ = new_callbacks.release();
353        free(__index_);
354        __index_ = new_ints.release();
355        __event_cap_ = rhs.__event_size_;
356    }
357    for (__event_size_ = 0; __event_size_ < rhs.__event_size_; ++__event_size_)
358    {
359        __fn_[__event_size_] = rhs.__fn_[__event_size_];
360        __index_[__event_size_] = rhs.__index_[__event_size_];
361    }
362    if (__iarray_cap_ < rhs.__iarray_size_)
363    {
364        free(__iarray_);
365        __iarray_ = new_longs.release();
366        __iarray_cap_ = rhs.__iarray_size_;
367    }
368    for (__iarray_size_ = 0; __iarray_size_ < rhs.__iarray_size_; ++__iarray_size_)
369        __iarray_[__iarray_size_] = rhs.__iarray_[__iarray_size_];
370    if (__parray_cap_ < rhs.__parray_size_)
371    {
372        free(__parray_);
373        __parray_ = new_pointers.release();
374        __parray_cap_ = rhs.__parray_size_;
375    }
376    for (__parray_size_ = 0; __parray_size_ < rhs.__parray_size_; ++__parray_size_)
377        __parray_[__parray_size_] = rhs.__parray_[__parray_size_];
378}
379
380void
381ios_base::move(ios_base& rhs)
382{
383    // *this is uninitialized
384    __fmtflags_ = rhs.__fmtflags_;
385    __precision_ = rhs.__precision_;
386    __width_ = rhs.__width_;
387    __rdstate_ = rhs.__rdstate_;
388    __exceptions_ = rhs.__exceptions_;
389    __rdbuf_ = 0;
390    locale& rhs_loc = *reinterpret_cast<locale*>(&rhs.__loc_);
391    ::new(&__loc_) locale(rhs_loc);
392    __fn_ = rhs.__fn_;
393    rhs.__fn_ = 0;
394    __index_ = rhs.__index_;
395    rhs.__index_ = 0;
396    __event_size_ = rhs.__event_size_;
397    rhs.__event_size_ = 0;
398    __event_cap_ = rhs.__event_cap_;
399    rhs.__event_cap_ = 0;
400    __iarray_ = rhs.__iarray_;
401    rhs.__iarray_ = 0;
402    __iarray_size_ = rhs.__iarray_size_;
403    rhs.__iarray_size_ = 0;
404    __iarray_cap_ = rhs.__iarray_cap_;
405    rhs.__iarray_cap_ = 0;
406    __parray_ = rhs.__parray_;
407    rhs.__parray_ = 0;
408    __parray_size_ = rhs.__parray_size_;
409    rhs.__parray_size_ = 0;
410    __parray_cap_ = rhs.__parray_cap_;
411    rhs.__parray_cap_ = 0;
412}
413
414void
415ios_base::swap(ios_base& rhs) _NOEXCEPT
416{
417    _VSTD::swap(__fmtflags_, rhs.__fmtflags_);
418    _VSTD::swap(__precision_, rhs.__precision_);
419    _VSTD::swap(__width_, rhs.__width_);
420    _VSTD::swap(__rdstate_, rhs.__rdstate_);
421    _VSTD::swap(__exceptions_, rhs.__exceptions_);
422    locale& lhs_loc = *reinterpret_cast<locale*>(&__loc_);
423    locale& rhs_loc = *reinterpret_cast<locale*>(&rhs.__loc_);
424    _VSTD::swap(lhs_loc, rhs_loc);
425    _VSTD::swap(__fn_, rhs.__fn_);
426    _VSTD::swap(__index_, rhs.__index_);
427    _VSTD::swap(__event_size_, rhs.__event_size_);
428    _VSTD::swap(__event_cap_, rhs.__event_cap_);
429    _VSTD::swap(__iarray_, rhs.__iarray_);
430    _VSTD::swap(__iarray_size_, rhs.__iarray_size_);
431    _VSTD::swap(__iarray_cap_, rhs.__iarray_cap_);
432    _VSTD::swap(__parray_, rhs.__parray_);
433    _VSTD::swap(__parray_size_, rhs.__parray_size_);
434    _VSTD::swap(__parray_cap_, rhs.__parray_cap_);
435}
436
437void
438ios_base::__set_badbit_and_consider_rethrow()
439{
440    __rdstate_ |= badbit;
441#ifndef _LIBCPP_NO_EXCEPTIONS
442    if (__exceptions_ & badbit)
443        throw;
444#endif  // _LIBCPP_NO_EXCEPTIONS
445}
446
447void
448ios_base::__set_failbit_and_consider_rethrow()
449{
450    __rdstate_ |= failbit;
451#ifndef _LIBCPP_NO_EXCEPTIONS
452    if (__exceptions_ & failbit)
453        throw;
454#endif  // _LIBCPP_NO_EXCEPTIONS
455}
456
457bool
458ios_base::sync_with_stdio(bool sync)
459{
460    static bool previous_state = true;
461    bool r = previous_state;
462    previous_state = sync;
463    return r;
464}
465
466_LIBCPP_END_NAMESPACE_STD
467