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39
40#include "qplatformdefs.h"
41#include "qfilesystemiterator_p.h"
42
43#if QT_CONFIG(textcodec)
44# include <qtextcodec.h>
45# include <private/qutfcodec_p.h>
46#endif
47
48#ifndef QT_NO_FILESYSTEMITERATOR
49
50#include <memory>
51
52#include <stdlib.h>
53#include <errno.h>
54
55QT_BEGIN_NAMESPACE
56
57static bool checkNameDecodable(const char *d_name, qsizetype len)
58{
59 // This function is called in a loop from advance() below, but the loop is
60 // usually run only once.
61
62#if QT_CONFIG(textcodec)
63 // We identify the codecs by their RFC 2978 MIBenum values. In this
64 // function:
65 // 3 US-ASCII (ANSI X3.4-1986)
66 // 4 Latin1 (ISO-8859-1)
67 // 106 UTF-8
68 QTextCodec *codec = QTextCodec::codecForLocale();
69# ifdef QT_LOCALE_IS_UTF8
70 int mibEnum = 106;
71# else
72 int mibEnum = 4; // Latin 1
73 if (codec)
74 mibEnum = codec->mibEnum();
75# endif
76 if (Q_LIKELY(mibEnum == 106)) // UTF-8
77 return QUtf8::isValidUtf8(d_name, len).isValidUtf8;
78 if (mibEnum == 3) // US-ASCII
79 return QtPrivate::isAscii(s: QLatin1String(d_name, len));
80 if (mibEnum == 4) // Latin 1
81 return true;
82
83 // fall back to generic QTextCodec
84 QTextCodec::ConverterState cs(QTextCodec::IgnoreHeader);
85 codec->toUnicode(in: d_name, length: len, state: &cs);
86 return cs.invalidChars == 0 && cs.remainingChars == 0;
87#else
88 // if we have no text codecs, then QString::fromLocal8Bit is fromLatin1
89 return true;
90#endif
91}
92
93QFileSystemIterator::QFileSystemIterator(const QFileSystemEntry &entry, QDir::Filters filters,
94 const QStringList &nameFilters, QDirIterator::IteratorFlags flags)
95 : nativePath(entry.nativeFilePath())
96 , dir(nullptr)
97 , dirEntry(nullptr)
98 , lastError(0)
99{
100 Q_UNUSED(filters)
101 Q_UNUSED(nameFilters)
102 Q_UNUSED(flags)
103
104 if ((dir = QT_OPENDIR(name: nativePath.constData())) == nullptr) {
105 lastError = errno;
106 } else {
107 if (!nativePath.endsWith(c: '/'))
108 nativePath.append(c: '/');
109 }
110}
111
112QFileSystemIterator::~QFileSystemIterator()
113{
114 if (dir)
115 QT_CLOSEDIR(dirp: dir);
116}
117
118bool QFileSystemIterator::advance(QFileSystemEntry &fileEntry, QFileSystemMetaData &metaData)
119{
120 if (!dir)
121 return false;
122
123 for (;;) {
124 dirEntry = QT_READDIR(dirp: dir);
125
126 if (dirEntry) {
127 qsizetype len = strlen(s: dirEntry->d_name);
128 if (checkNameDecodable(d_name: dirEntry->d_name, len)) {
129 fileEntry = QFileSystemEntry(nativePath + QByteArray(dirEntry->d_name, len), QFileSystemEntry::FromNativePath());
130 metaData.fillFromDirEnt(statBuffer: *dirEntry);
131 return true;
132 }
133 } else {
134 break;
135 }
136 }
137
138 lastError = errno;
139 return false;
140}
141
142QT_END_NAMESPACE
143
144#endif // QT_NO_FILESYSTEMITERATOR
145

source code of qtbase/src/corelib/io/qfilesystemiterator_unix.cpp