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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
55 QT_BEGIN_NAMESPACE
56
checkNameDecodable(const char * d_name,qsizetype len)57 static 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(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(d_name, len, &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
QFileSystemIterator(const QFileSystemEntry & entry,QDir::Filters filters,const QStringList & nameFilters,QDirIterator::IteratorFlags flags)93 QFileSystemIterator::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(nativePath.constData())) == nullptr) {
105 lastError = errno;
106 } else {
107 if (!nativePath.endsWith('/'))
108 nativePath.append('/');
109 }
110 }
111
~QFileSystemIterator()112 QFileSystemIterator::~QFileSystemIterator()
113 {
114 if (dir)
115 QT_CLOSEDIR(dir);
116 }
117
advance(QFileSystemEntry & fileEntry,QFileSystemMetaData & metaData)118 bool QFileSystemIterator::advance(QFileSystemEntry &fileEntry, QFileSystemMetaData &metaData)
119 {
120 if (!dir)
121 return false;
122
123 for (;;) {
124 dirEntry = QT_READDIR(dir);
125
126 if (dirEntry) {
127 qsizetype len = strlen(dirEntry->d_name);
128 if (checkNameDecodable(dirEntry->d_name, len)) {
129 fileEntry = QFileSystemEntry(nativePath + QByteArray(dirEntry->d_name, len), QFileSystemEntry::FromNativePath());
130 metaData.fillFromDirEnt(*dirEntry);
131 return true;
132 }
133 } else {
134 break;
135 }
136 }
137
138 lastError = errno;
139 return false;
140 }
141
142 QT_END_NAMESPACE
143
144 #endif // QT_NO_FILESYSTEMITERATOR
145