1 /*
2 * Copyright (C) 2010 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <ios_base.h>
30 #include <cstdio>
31 #include <new> // for placement new.
32 #include <iostream> // For cout, cerr
33 #include <ostream>
34 #include <stdio_filebuf.h>
35 #include <streambuf>
36
37 // Defined in bionic/libstdc++/src/one_time_construction.cpp
38 extern "C" int __cxa_guard_acquire(int volatile * gv);
39 extern "C" void __cxa_guard_release(int volatile * gv);
40
41 namespace std {
42 int ios_base::Init::sGuard = 0;
43 bool ios_base::Init::sDone = false;
44
45 // Implementation of the ios_base, common stuff for all the streams.
46
ios_base()47 ios_base::ios_base()
48 : mFlags(skipws | dec), mPrecision(6), mWidth(0) {}
49
~ios_base()50 ios_base::~ios_base() {}
51
flags(fmtflags flags)52 ios_base::fmtflags ios_base::flags(fmtflags flags) {
53 fmtflags prev = mFlags;
54 mFlags = flags;
55 return prev;
56 }
57
setf(fmtflags flags)58 ios_base::fmtflags ios_base::setf(fmtflags flags) {
59 fmtflags prev = mFlags;
60 mFlags = flags;
61 return prev;
62 }
63
setf(fmtflags flags,fmtflags mask)64 ios_base::fmtflags ios_base::setf(fmtflags flags, fmtflags mask) {
65 fmtflags prev = mFlags;
66 mFlags &= ~mask;
67 mFlags |= (flags & mask);
68 return prev;
69 }
70
unsetf(fmtflags mask)71 void ios_base::unsetf(fmtflags mask) {
72 mFlags &= ~mask;
73 }
74
precision(streamsize precision)75 streamsize ios_base::precision(streamsize precision) {
76 const streamsize prev = mPrecision;
77 if (precision >= 0) { // Not sure what a negative precision would mean.
78 mPrecision = precision;
79 }
80 return prev;
81 }
82
width(streamsize width)83 streamsize ios_base::width(streamsize width) {
84 const streamsize prev = mWidth;
85 if (width >= 0) { // Not sure what a negative width would mean.
86 mWidth = width;
87 }
88 return prev;
89 }
90
91 // TODO: This is a temporary class used to illustrate how the
92 // construction will happen.
93
94 class std_filebuf: public streambuf {
95 public:
std_filebuf()96 std_filebuf() {}
~std_filebuf()97 virtual ~std_filebuf() {}
98 };
99
100 // Storage is declared in src/ios_globals.cpp
101 extern android::stdio_filebuf stdio_filebuf_cout;
102 extern android::stdio_filebuf stdio_filebuf_cerr;
103
Init()104 ios_base::Init::Init() {
105 if (__cxa_guard_acquire(&sGuard) == 1) {
106 if (!sDone) {
107 // Create the global cout and cerr
108 // structures. stdio_filebuf_cout/stdio_filebuf_cerr and
109 // cout/cerr storage are in ios_globals.cpp.
110 new (&stdio_filebuf_cout) android::stdio_filebuf(stdout);
111 new (&stdio_filebuf_cerr) android::stdio_filebuf(stderr);
112 new (&cout) ostream(&stdio_filebuf_cout);
113 new (&cerr) ostream(&stdio_filebuf_cerr);
114 sDone = true;
115 }
116 __cxa_guard_release(&sGuard);
117 }
118 }
119
~Init()120 ios_base::Init::~Init() {
121 cout.flush();
122 cerr.flush();
123 }
124
125 } // namespace std
126