void tst_qbytearray::append()
{
QFETCH(int, size);
QByteArray ba;
QBENCHMARK {
QByteArray ba2(size, 'x');
ba.append(ba2);
ba.clear();
}
}
void wrapInFunction()
{
//! [0]
QByteArray ba("Hello");
//! [0]
//! [1]
QByteArray ba;
ba.resize(5);
ba[0] = 0x3c;
ba[1] = 0xb8;
ba[2] = 0x64;
ba[3] = 0x18;
ba[4] = 0xca;
//! [1]
//! [2]
for (int i = 0; i < ba.size(); ++i) {
if (ba.at(i) >= 'a' && ba.at(i) <= 'f')
cout << "Found character in range [a-f]" << endl;
}
//! [2]
//! [3]
QByteArray x("and");
x.prepend("rock "); // x == "rock and"
x.append(" roll"); // x == "rock and roll"
x.replace(5, 3, "&"); // x == "rock & roll"
//! [3]
//! [4]
QByteArray ba("We must be <b>bold</b>, very <b>bold</b>");
int j = 0;
while ((j = ba.indexOf("<b>", j)) != -1) {
cout << "Found <b> tag at index position " << j << endl;
++j;
}
//! [4]
//! [5]
QByteArray().isNull(); // returns true
QByteArray().isEmpty(); // returns true
QByteArray("").isNull(); // returns false
QByteArray("").isEmpty(); // returns true
QByteArray("abc").isNull(); // returns false
QByteArray("abc").isEmpty(); // returns false
//! [5]
//! [6]
QByteArray ba("Hello");
int n = ba.size(); // n == 5
ba.data()[0]; // returns 'H'
ba.data()[4]; // returns 'o'
ba.data()[5]; // returns '\0'
//! [6]
//! [7]
QByteArray().isEmpty(); // returns true
QByteArray("").isEmpty(); // returns true
QByteArray("abc").isEmpty(); // returns false
//! [7]
//! [8]
QByteArray ba("Hello world");
char *data = ba.data();
while (*data) {
cout << "[" << *data << "]" << endl;
++data;
}
//! [8]
//! [9]
QByteArray ba;
for (int i = 0; i < 10; ++i)
ba[i] = 'A' + i;
// ba == "ABCDEFGHIJ"
//! [9]
//! [10]
QByteArray ba("Stockholm");
ba.truncate(5); // ba == "Stock"
//! [10]
//! [11]
QByteArray ba("STARTTLS\r\n");
ba.chop(2); // ba == "STARTTLS"
//! [11]
//! [12]
QByteArray x("free");
QByteArray y("dom");
x += y;
// x == "freedom"
//! [12]
//! [13]
QByteArray().isNull(); // returns true
QByteArray("").isNull(); // returns false
QByteArray("abc").isNull(); // returns false
//! [13]
//! [14]
QByteArray ba("Istambul");
ba.fill('o');
// ba == "oooooooo"
ba.fill('X', 2);
// ba == "XX"
//! [14]
//! [15]
QByteArray x("ship");
QByteArray y("air");
x.prepend(y);
// x == "airship"
//! [15]
//! [16]
QByteArray x("free");
QByteArray y("dom");
x.append(y);
// x == "freedom"
//! [16]
//! [17]
QByteArray ba("Meal");
ba.insert(1, QByteArray("ontr"));
// ba == "Montreal"
//! [17]
//! [18]
QByteArray ba("Montreal");
ba.remove(1, 4);
// ba == "Meal"
//! [18]
//! [19]
QByteArray x("Say yes!");
QByteArray y("no");
x.replace(4, 3, y);
// x == "Say no!"
//! [19]
//! [20]
QByteArray ba("colour behaviour flavour neighbour");
ba.replace(QByteArray("ou"), QByteArray("o"));
// ba == "color behavior flavor neighbor"
//! [20]
//! [21]
QByteArray x("sticky question");
QByteArray y("sti");
x.indexOf(y); // returns 0
x.indexOf(y, 1); // returns 10
x.indexOf(y, 10); // returns 10
x.indexOf(y, 11); // returns -1
//! [21]
//! [22]
QByteArray ba("ABCBA");
ba.indexOf("B"); // returns 1
ba.indexOf("B", 1); // returns 1
ba.indexOf("B", 2); // returns 3
ba.indexOf("X"); // returns -1
//! [22]
//! [23]
QByteArray x("crazy azimuths");
QByteArray y("az");
x.lastIndexOf(y); // returns 6
x.lastIndexOf(y, 6); // returns 6
x.lastIndexOf(y, 5); // returns 2
x.lastIndexOf(y, 1); // returns -1
//! [23]
//! [24]
QByteArray ba("ABCBA");
ba.lastIndexOf("B"); // returns 3
ba.lastIndexOf("B", 3); // returns 3
ba.lastIndexOf("B", 2); // returns 1
ba.lastIndexOf("X"); // returns -1
//! [24]
//! [25]
QByteArray url("ftp://ftp.qt-project.org/");
if (url.startsWith("ftp:"))
...
//! [25]
//! [26]
QByteArray url("http://qt-project.org/doc/qt-5.0/qtdoc/index.html");
if (url.endsWith(".html"))
...
//! [26]
//! [27]
QByteArray x("Pineapple");
QByteArray y = x.left(4);
// y == "Pine"
//! [27]
//! [28]
QByteArray x("Pineapple");
QByteArray y = x.right(5);
// y == "apple"
//! [28]
//! [29]
QByteArray x("Five pineapples");
QByteArray y = x.mid(5, 4); // y == "pine"
QByteArray z = x.mid(5); // z == "pineapples"
//! [29]
//! [30]
QByteArray x("Qt by DIGIA");
QByteArray y = x.toLower();
// y == "qt by digia"
//! [30]
//! [31]
QByteArray x("Qt by DIGIA");
QByteArray y = x.toUpper();
// y == "QT BY DIGIA"
//! [31]
//! [32]
QByteArray ba(" lots\t of\nwhitespace\r\n ");
ba = ba.simplified();
// ba == "lots of whitespace";
//! [32]
//! [33]
QByteArray ba(" lots\t of\nwhitespace\r\n ");
ba = ba.trimmed();
// ba == "lots\t of\nwhitespace";
//! [33]
//! [34]
QByteArray x("apple");
QByteArray y = x.leftJustified(8, '.'); // y == "apple..."
//! [34]
//! [35]
QByteArray x("apple");
QByteArray y = x.rightJustified(8, '.'); // y == "...apple"
//! [35]
//! [36]
QByteArray str("FF");
bool ok;
int hex = str.toInt(&ok, 16); // hex == 255, ok == true
int dec = str.toInt(&ok, 10); // dec == 0, ok == false
//! [36]
//! [37]
QByteArray str("FF");
bool ok;
long hex = str.toLong(&ok, 16); // hex == 255, ok == true
long dec = str.toLong(&ok, 10); // dec == 0, ok == false
//! [37]
//! [38]
QByteArray string("1234.56");
double a = string.toDouble(); // a == 1234.56
//! [38]
//! [39]
QByteArray text("Qt is great!");
text.toBase64(); // returns "UXQgaXMgZ3JlYXQh"
//! [39]
//! [39bis]
QByteArray text("<p>Hello?</p>");
text.toBase64(QByteArray::Base64 | QByteArray::OmitTrailingEquals); // returns "PHA+SGVsbG8/PC9wPg"
text.toBase64(QByteArray::Base64); // returns "PHA+SGVsbG8/PC9wPg=="
text.toBase64(QByteArray::Base64Url); // returns "PHA-SGVsbG8_PC9wPg=="
text.toBase64(QByteArray::Base64Url | QByteArray::OmitTrailingEquals); // returns "PHA-SGVsbG8_PC9wPg"
//! [39bis]
//! [40]
QByteArray ba;
int n = 63;
ba.setNum(n); // ba == "63"
ba.setNum(n, 16); // ba == "3f"
//! [40]
//! [41]
int n = 63;
QByteArray::number(n); // returns "63"
QByteArray::number(n, 16); // returns "3f"
QByteArray::number(n, 16).toUpper(); // returns "3F"
//! [41]
//! [42]
QByteArray ba = QByteArray::number(12.3456, 'E', 3);
// ba == 1.235E+01
//! [42]
//! [43]
static const char mydata[] = {
0x00, 0x00, 0x03, 0x84, 0x78, 0x9c, 0x3b, 0x76,
0xec, 0x18, 0xc3, 0x31, 0x0a, 0xf1, 0xcc, 0x99,
...
0x6d, 0x5b
};
QByteArray data = QByteArray::fromRawData(mydata, sizeof(mydata));
QDataStream in(&data, QIODevice::ReadOnly);
...
//! [43]
//! [44]
QByteArray text = QByteArray::fromBase64("UXQgaXMgZ3JlYXQh");
text.data(); // returns "Qt is great!"
//! [44]
//! [44bis]
QByteArray::fromBase64("PHA+SGVsbG8/PC9wPg==", QByteArray::Base64Encoding); // returns "<p>Hello?</p>"
QByteArray::fromBase64("PHA-SGVsbG8_PC9wPg==", QByteArray::Base64UrlEncoding); // returns "<p>Hello?</p>"
//! [44bis]
//! [45]
QByteArray text = QByteArray::fromHex("517420697320677265617421");
text.data(); // returns "Qt is great!"
//! [45]
//! [46]
QString tmp = "test";
QByteArray text = tmp.toLocal8Bit();
char *data = new char[text.size()];
strcpy(data, text.data());
delete [] data;
//! [46]
//! [47]
QString tmp = "test";
QByteArray text = tmp.toLocal8Bit();
char *data = new char[text.size() + 1];
strcpy(data, text.data());
delete [] data;
//! [47]
//! [48]
QByteArray ba1("ca\0r\0t");
ba1.size(); // Returns 2.
ba1.constData(); // Returns "ca" with terminating \0.
QByteArray ba2("ca\0r\0t", 3);
ba2.size(); // Returns 3.
ba2.constData(); // Returns "ca\0" with terminating \0.
QByteArray ba3("ca\0r\0t", 4);
ba3.size(); // Returns 4.
ba3.constData(); // Returns "ca\0r" with terminating \0.
const char cart[] = {'c', 'a', '\0', 'r', '\0', 't'};
QByteArray ba4(QByteArray::fromRawData(cart, 6));
ba4.size(); // Returns 6.
ba4.constData(); // Returns "ca\0r\0t" without terminating \0.
//! [48]
}
