summaryrefslogtreecommitdiffstats
path: root/Python/structmember.c
blob: af0296d802fd81cab89ebdb20f24d44c58636bb1 (plain) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296


/* Map C struct members to Python object attributes */

#include "Python.h"

#include "structmember.h"

PyObject *
PyMember_GetOne(const char *addr, PyMemberDef *l)
{
    PyObject *v;

    addr += l->offset;
    switch (l->type) {
    case T_BOOL:
        v = PyBool_FromLong(*(char*)addr);
        break;
    case T_BYTE:
        v = PyLong_FromLong(*(char*)addr);
        break;
    case T_UBYTE:
        v = PyLong_FromUnsignedLong(*(unsigned char*)addr);
        break;
    case T_SHORT:
        v = PyLong_FromLong(*(short*)addr);
        break;
    case T_USHORT:
        v = PyLong_FromUnsignedLong(*(unsigned short*)addr);
        break;
    case T_INT:
        v = PyLong_FromLong(*(int*)addr);
        break;
    case T_UINT:
        v = PyLong_FromUnsignedLong(*(unsigned int*)addr);
        break;
    case T_LONG:
        v = PyLong_FromLong(*(long*)addr);
        break;
    case T_ULONG:
        v = PyLong_FromUnsignedLong(*(unsigned long*)addr);
        break;
    case T_PYSSIZET:
        v = PyLong_FromSsize_t(*(Py_ssize_t*)addr);
        break;
    case T_FLOAT:
        v = PyFloat_FromDouble((double)*(float*)addr);
        break;
    case T_DOUBLE:
        v = PyFloat_FromDouble(*(double*)addr);
        break;
    case T_STRING:
        if (*(char**)addr == NULL) {
            Py_INCREF(Py_None);
            v = Py_None;
        }
        else
            v = PyUnicode_FromString(*(char**)addr);
        break;
    case T_STRING_INPLACE:
        v = PyUnicode_FromString((char*)addr);
        break;
    case T_CHAR:
        v = PyUnicode_FromStringAndSize((char*)addr, 1);
        break;
    case T_OBJECT:
        v = *(PyObject **)addr;
        if (v == NULL)
            v = Py_None;
        Py_INCREF(v);
        break;
    case T_OBJECT_EX:
        v = *(PyObject **)addr;
        if (v == NULL)
            PyErr_SetString(PyExc_AttributeError, l->name);
        Py_XINCREF(v);
        break;
#ifdef HAVE_LONG_LONG
    case T_LONGLONG:
        v = PyLong_FromLongLong(*(PY_LONG_LONG *)addr);
        break;
    case T_ULONGLONG:
        v = PyLong_FromUnsignedLongLong(*(unsigned PY_LONG_LONG *)addr);
        break;
#endif /* HAVE_LONG_LONG */
    case T_NONE:
        v = Py_None;
        Py_INCREF(v);
        break;
    default:
        PyErr_SetString(PyExc_SystemError, "bad memberdescr type");
        v = NULL;
    }
    return v;
}

#define WARN(msg)                                               \
    do {                                                        \
    if (PyErr_WarnEx(PyExc_RuntimeWarning, msg, 1) < 0)         \
        return -1;                                              \
    } while (0)

int
PyMember_SetOne(char *addr, PyMemberDef *l, PyObject *v)
{
    PyObject *oldv;

    addr += l->offset;

    if ((l->flags & READONLY))
    {
        PyErr_SetString(PyExc_AttributeError, "readonly attribute");
        return -1;
    }
    if (v == NULL) {
        if (l->type == T_OBJECT_EX) {
            /* Check if the attribute is set. */
            if (*(PyObject **)addr == NULL) {
                PyErr_SetString(PyExc_AttributeError, l->name);
                return -1;
            }
        }
        else if (l->type != T_OBJECT) {
            PyErr_SetString(PyExc_TypeError,
                            "can't delete numeric/char attribute");
            return -1;
        }
    }
    switch (l->type) {
    case T_BOOL:{
        if (!PyBool_Check(v)) {
            PyErr_SetString(PyExc_TypeError,
                            "attribute value type must be bool");
            return -1;
        }
        if (v == Py_True)
            *(char*)addr = (char) 1;
        else
            *(char*)addr = (char) 0;
        break;
        }
    case T_BYTE:{
        long long_val = PyLong_AsLong(v);
        if ((long_val == -1) && PyErr_Occurred())
            return -1;
        *(char*)addr = (char)long_val;
        /* XXX: For compatibility, only warn about truncations
           for now. */
        if ((long_val > CHAR_MAX) || (long_val < CHAR_MIN))
            WARN("Truncation of value to char");
        break;
        }
    case T_UBYTE:{
        long long_val = PyLong_AsLong(v);
        if ((long_val == -1) && PyErr_Occurred())
            return -1;
        *(unsigned char*)addr = (unsigned char)long_val;
        if ((long_val > UCHAR_MAX) || (long_val < 0))
            WARN("Truncation of value to unsigned char");
        break;
        }
    case T_SHORT:{
        long long_val = PyLong_AsLong(v);
        if ((long_val == -1) && PyErr_Occurred())
            return -1;
        *(short*)addr = (short)long_val;
        if ((long_val > SHRT_MAX) || (long_val < SHRT_MIN))
            WARN("Truncation of value to short");
        break;
        }
    case T_USHORT:{
        long long_val = PyLong_AsLong(v);
        if ((long_val == -1) && PyErr_Occurred())
            return -1;
        *(unsigned short*)addr = (unsigned short)long_val;
        if ((long_val > USHRT_MAX) || (long_val < 0))
            WARN("Truncation of value to unsigned short");
        break;
        }
    case T_INT:{
        long long_val = PyLong_AsLong(v);
        if ((long_val == -1) && PyErr_Occurred())
            return -1;
        *(int *)addr = (int)long_val;
        if ((long_val > INT_MAX) || (long_val < INT_MIN))
            WARN("Truncation of value to int");
        break;
        }
    case T_UINT:{
        unsigned long ulong_val = PyLong_AsUnsignedLong(v);
        if ((ulong_val == (unsigned long)-1) && PyErr_Occurred()) {
            /* XXX: For compatibility, accept negative int values
               as well. */
            PyErr_Clear();
            ulong_val = PyLong_AsLong(v);
            if ((ulong_val == (unsigned long)-1) &&
                PyErr_Occurred())
                return -1;
            *(unsigned int *)addr = (unsigned int)ulong_val;
            WARN("Writing negative value into unsigned field");
        } else
            *(unsigned int *)addr = (unsigned int)ulong_val;
        if (ulong_val > UINT_MAX)
            WARN("Truncation of value to unsigned int");
        break;
        }
    case T_LONG:{
        *(long*)addr = PyLong_AsLong(v);
        if ((*(long*)addr == -1) && PyErr_Occurred())
            return -1;
        break;
        }
    case T_ULONG:{
        *(unsigned long*)addr = PyLong_AsUnsignedLong(v);
        if ((*(unsigned long*)addr == (unsigned long)-1)
            && PyErr_Occurred()) {
            /* XXX: For compatibility, accept negative int values
               as well. */
            PyErr_Clear();
            *(unsigned long*)addr = PyLong_AsLong(v);
            if ((*(unsigned long*)addr == (unsigned long)-1)
                && PyErr_Occurred())
                return -1;
            WARN("Writing negative value into unsigned field");
        }
        break;
        }
    case T_PYSSIZET:{
        *(Py_ssize_t*)addr = PyLong_AsSsize_t(v);
        if ((*(Py_ssize_t*)addr == (Py_ssize_t)-1)
            && PyErr_Occurred())
                        return -1;
        break;
        }
    case T_FLOAT:{
        double double_val = PyFloat_AsDouble(v);
        if ((double_val == -1) && PyErr_Occurred())
            return -1;
        *(float*)addr = (float)double_val;
        break;
        }
    case T_DOUBLE:
        *(double*)addr = PyFloat_AsDouble(v);
        if ((*(double*)addr == -1) && PyErr_Occurred())
            return -1;
        break;
    case T_OBJECT:
    case T_OBJECT_EX:
        Py_XINCREF(v);
        oldv = *(PyObject **)addr;
        *(PyObject **)addr = v;
        Py_XDECREF(oldv);
        break;
    case T_CHAR: {
        char *string;
        Py_ssize_t len;

        string = _PyUnicode_AsStringAndSize(v, &len);
        if (string == NULL || len != 1) {
            PyErr_BadArgument();
            return -1;
        }
        *(char*)addr = string[0];
        break;
        }
    case T_STRING:
    case T_STRING_INPLACE:
        PyErr_SetString(PyExc_TypeError, "readonly attribute");
        return -1;
#ifdef HAVE_LONG_LONG
    case T_LONGLONG:{
        PY_LONG_LONG value;
        *(PY_LONG_LONG*)addr = value = PyLong_AsLongLong(v);
        if ((value == -1) && PyErr_Occurred())
            return -1;
        break;
        }
    case T_ULONGLONG:{
        unsigned PY_LONG_LONG value;
        /* ??? PyLong_AsLongLong accepts an int, but PyLong_AsUnsignedLongLong
            doesn't ??? */
        if (PyLong_Check(v))
            *(unsigned PY_LONG_LONG*)addr = value = PyLong_AsUnsignedLongLong(v);
        else
            *(unsigned PY_LONG_LONG*)addr = value = PyLong_AsLong(v);
        if ((value == (unsigned PY_LONG_LONG)-1) && PyErr_Occurred())
            return -1;
        break;
        }
#endif /* HAVE_LONG_LONG */
    default:
        PyErr_Format(PyExc_SystemError,
                     "bad memberdescr type for %s", l->name);
        return -1;
    }
    return 0;
}
generated by cgit v0.12 at 2025-08-11 02:07:54 (GMT)
>.at(i) >= QChar('a') && str.at(i) <= QChar('f')) qDebug() << "Found character in range [a-f]"; } //! [3] } void Widget::stringLiteral() { //! [4] QString str; if (str == "auto" || str == "extern" || str == "static" || str == "register") { // ... } //! [4] } void Widget::modify() { //! [5] QString str = "and"; str.prepend("rock "); // str == "rock and" str.append(" roll"); // str == "rock and roll" str.replace(5, 3, "&"); // str == "rock & roll" //! [5] } void Widget::index() { //! [6] QString str = "We must be <b>bold</b>, very <b>bold</b>"; int j = 0; while ((j = str.indexOf("<b>", j)) != -1) { qDebug() << "Found <b> tag at index position" << j; ++j; } //! [6] } //! [7] QString Widget::boolToString(bool b) { QString result; if (b) result = "True"; else result = "False"; return result; } //! [7] void Widget::nullVsEmpty() { //! [8] QString().isNull(); // returns true QString().isEmpty(); // returns true QString("").isNull(); // returns false QString("").isEmpty(); // returns true QString("abc").isNull(); // returns false QString("abc").isEmpty(); // returns false //! [8] } void Widget::appendFunction() { //! [9] QString x = "free"; QString y = "dom"; x.append(y); // x == "freedom" //! [9] //! [10] x.insert(x.size(), y); //! [10] } void Widget::argFunction() { //! [11] QString i; // current file's number QString total; // number of files to process QString fileName; // current file's name QString status = QString("Processing file %1 of %2: %3") .arg(i).arg(total).arg(fileName); //! [11] //! [12] //! [13] QString str; //! [12] str = "%1 %2"; str.arg("%1f", "Hello"); // returns "%1f Hello" str.arg("%1f").arg("Hello"); // returns "Hellof %2" //! [13] //! [14] str = QString("Decimal 63 is %1 in hexadecimal") .arg(63, 0, 16); // str == "Decimal 63 is 3f in hexadecimal" QLocale::setDefault(QLocale(QLocale::English, QLocale::UnitedStates)); str = QString("%1 %L2 %L3") .arg(12345) .arg(12345) .arg(12345, 0, 16); // str == "12345 12,345 3039" //! [14] } void Widget::chopFunction() { //! [15] QString str("LOGOUT\r\n"); str.chop(2); // str == "LOGOUT" //! [15] } void Widget::compareFunction() { int x = QString::compare("auto", "auto"); // x == 0 int y = QString::compare("auto", "car"); // y < 0 int z = QString::compare("car", "auto"); // z > 0 } void Widget::compareSensitiveFunction() { //! [16] int x = QString::compare("aUtO", "AuTo", Qt::CaseInsensitive); // x == 0 int y = QString::compare("auto", "Car", Qt::CaseSensitive); // y > 0 int z = QString::compare("auto", "Car", Qt::CaseInsensitive); // z < 0 //! [16] } void Widget::containsFunction() { //! [17] QString str = "Peter Pan"; str.contains("peter", Qt::CaseInsensitive); // returns true //! [17] } void Widget::countFunction() { //! [18] QString str = "banana and panama"; str.count(QRegExp("a[nm]a")); // returns 4 //! [18] } void Widget::dataFunction() { //! [19] QString str = "Hello world"; QChar *data = str.data(); while (!data->isNull()) { qDebug() << data->unicode(); ++data; } //! [19] } void Widget::endsWithFunction() { //! [20] QString str = "Bananas"; str.endsWith("anas"); // returns true str.endsWith("pple"); // returns false //! [20] } void Widget::fillFunction() { //! [21] QString str = "Berlin"; str.fill('z'); // str == "zzzzzz" str.fill('A', 2); // str == "AA" //! [21] } void Widget::fromRawDataFunction() { //! [22] QRegExp pattern; static const QChar unicode[] = { 0x005A, 0x007F, 0x00A4, 0x0060, 0x1009, 0x0020, 0x0020}; int size = sizeof(unicode) / sizeof(QChar); QString str = QString::fromRawData(unicode, size); if (str.contains(QRegExp(pattern))) { // ... //! [22] //! [23] } //! [23] } void Widget::indexOfFunction() { //! [24] QString x = "sticky question"; QString 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 //! [24] } void Widget::firstIndexOfFunction() { //! [25] QString str = "the minimum"; str.indexOf(QRegExp("m[aeiou]"), 0); // returns 4 //! [25] } void Widget::insertFunction() { //! [26] QString str = "Meal"; str.insert(1, QString("ontr")); // str == "Montreal" //! [26] } void Widget::isEmptyFunction() { //! [27] QString().isEmpty(); // returns true QString("").isEmpty(); // returns true QString("x").isEmpty(); // returns false QString("abc").isEmpty(); // returns false //! [27] } void Widget::isNullFunction() { //! [28] QString().isNull(); // returns true QString("").isNull(); // returns false QString("abc").isNull(); // returns false //! [28] } void Widget::lastIndexOfFunction() { //! [29] QString x = "crazy azimuths"; QString 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 //! [29] //! [30] QString str = "the minimum"; str.lastIndexOf(QRegExp("m[aeiou]")); // returns 8 //! [30] } void Widget::leftFunction() { //! [31] QString x = "Pineapple"; QString y = x.left(4); // y == "Pine" //! [31] } void Widget::leftJustifiedFunction() { //! [32] QString s = "apple"; QString t = s.leftJustified(8, '.'); // t == "apple..." //! [32] //! [33] QString str = "Pineapple"; str = str.leftJustified(5, '.', true); // str == "Pinea" //! [33] } void Widget::midFunction() { //! [34] QString x = "Nine pineapples"; QString y = x.mid(5, 4); // y == "pine" QString z = x.mid(5); // z == "pineapples" //! [34] } void Widget::numberFunction() { //! [35] long a = 63; QString s = QString::number(a, 16); // s == "3f" QString t = QString::number(a, 16).toUpper(); // t == "3F" //! [35] } void Widget::prependFunction() { //! [36] QString x = "ship"; QString y = "air"; x.prepend(y); // x == "airship" //! [36] } void Widget::removeFunction() { //! [37] QString s = "Montreal"; s.remove(1, 4); // s == "Meal" //! [37] //! [38] QString t = "Ali Baba"; t.remove(QChar('a'), Qt::CaseInsensitive); // t == "li Bb" //! [38] //! [39] QString r = "Telephone"; r.remove(QRegExp("[aeiou].")); // r == "The" //! [39] } void Widget::replaceFunction() { //! [40] QString x = "Say yes!"; QString y = "no"; x.replace(4, 3, y); // x == "Say no!" //! [40] //! [41] QString str = "colour behaviour flavour neighbour"; str.replace(QString("ou"), QString("o")); // str == "color behavior flavor neighbor" //! [41] //! [42] QString s = "Banana"; s.replace(QRegExp("a[mn]"), "ox"); // s == "Boxoxa" //! [42] //! [43] QString t = "A <i>bon mot</i>."; t.replace(QRegExp("<i>([^<]*)</i>"), "\\emph{\\1}"); // t == "A \\emph{bon mot}." //! [43] //! [86] QString equis = "xxxxxx"; equis.replace("xx", "x"); // equis == "xxx" //! [86] } void Widget::reserveFunction() { //! [44] QString result; int maxSize; bool condition; QChar nextChar; result.reserve(maxSize); while (condition) result.append(nextChar); result.squeeze(); //! [44] } void Widget::resizeFunction() { //! [45] QString s = "Hello world"; s.resize(5); // s == "Hello" s.resize(8); // s == "Hello???" (where ? stands for any character) //! [45] //! [46] QString t = "Hello"; t += QString(10, 'X'); // t == "HelloXXXXXXXXXX" //! [46] //! [47] QString r = "Hello"; r = r.leftJustified(10, ' '); // r == "Hello " //! [47] } void Widget::rightFunction() { //! [48] QString x = "Pineapple"; QString y = x.right(5); // y == "apple" //! [48] } void Widget::rightJustifiedFunction() { //! [49] QString s = "apple"; QString t = s.rightJustified(8, '.'); // t == "...apple" //! [49] //! [50] QString str = "Pineapple"; str = str.rightJustified(5, '.', true); // str == "Pinea" //! [50] } void Widget::sectionFunction() { //! [51] //! [52] QString str; //! [51] QString csv = "forename,middlename,surname,phone"; QString path = "/usr/local/bin/myapp"; // First field is empty QString::SectionFlag flag = QString::SectionSkipEmpty; str = csv.section(',', 2, 2); // str == "surname" str = path.section('/', 3, 4); // str == "bin/myapp" str = path.section('/', 3, 3, flag); // str == "myapp" //! [52] //! [53] str = csv.section(',', -3, -2); // str == "middlename,surname" str = path.section('/', -1); // str == "myapp" //! [53] //! [54] QString data = "forename**middlename**surname**phone"; str = data.section("**", 2, 2); // str == "surname" str = data.section("**", -3, -2); // str == "middlename**surname" //! [54] //! [55] QString line = "forename\tmiddlename surname \t \t phone"; QRegExp sep("\\s+"); str = line.section(sep, 2, 2); // s == "surname" str = line.section(sep, -3, -2); // s == "middlename surname" //! [55] } void Widget::setNumFunction() { //! [56] QString str; str.setNum(1234); // str == "1234" //! [56] } void Widget::simplifiedFunction() { //! [57] QString str = " lots\t of\nwhitespace\r\n "; str = str.simplified(); // str == "lots of whitespace"; //! [57] } void Widget::sizeFunction() { //! [58] QString str = "World"; int n = str.size(); // n == 5 str.data()[0]; // returns 'W' str.data()[4]; // returns 'd' str.data()[5]; // returns '\0' //! [58] } void Widget::splitFunction() { //! [59] QString str; QStringList list; str = "Some text\n\twith strange whitespace."; list = str.split(QRegExp("\\s+")); // list: [ "Some", "text", "with", "strange", "whitespace." ] //! [59] //! [60] str = "This time, a normal English sentence."; list = str.split(QRegExp("\\W+"), QString::SkipEmptyParts); // list: [ "This", "time", "a", "normal", "English", "sentence" ] //! [60] //! [61] str = "Now: this sentence fragment."; list = str.split(QRegExp("\\b")); // list: [ "", "Now", ": ", "this", " ", "sentence", " ", "fragment", "." ] //! [61] } void Widget::splitCaseSensitiveFunction() { //! [62] QString str = "a,,b,c"; QStringList list1 = str.split(","); // list1: [ "a", "", "b", "c" ] QStringList list2 = str.split(",", QString::SkipEmptyParts); // list2: [ "a", "b", "c" ] //! [62] } void Widget::sprintfFunction() { //! [63] size_t BufSize; char buf[BufSize]; ::snprintf(buf, BufSize, "%lld", 123456789LL); QString str = QString::fromAscii(buf); //! [63] //! [64] QString result; QTextStream(&result) << "pi = " << 3.14; // result == "pi = 3.14" //! [64] } void Widget::startsWithFunction() { //! [65] QString str = "Bananas"; str.startsWith("Ban"); // returns true str.startsWith("Car"); // returns false //! [65] } void Widget::toDoubleFunction() { //! [66] QString str = "1234.56"; double val = str.toDouble(); // val == 1234.56 //! [66] //! [67] bool ok; double d; d = QString( "1234.56e-02" ).toDouble(&ok); // ok == true, d == 12.3456 //! [67] //! [68] //! [69] QLocale::setDefault(QLocale::C); d = QString( "1234,56" ).toDouble(&ok); // ok == false //! [68] d = QString( "1234.56" ).toDouble(&ok); // ok == true, d == 1234.56 //! [69] //! [70] QLocale::setDefault(QLocale::German); d = QString( "1234,56" ).toDouble(&ok); // ok == true, d == 1234.56 d = QString( "1234.56" ).toDouble(&ok); // ok == true, d == 1234.56 //! [70] QLocale::setDefault(QLocale::C); d = QString( "1,234,567.89" ).toDouble(&ok); // ok == false } void Widget::toFloatFunction() { //! [71] QString str1 = "1234.56"; str1.toFloat(); // returns 1234.56 bool ok; QString str2 = "R2D2"; str2.toFloat(&ok); // returns 0.0, sets ok to false //! [71] } void Widget::toIntFunction() { //! [72] QString str = "FF"; bool ok; int hex = str.toInt(&ok, 16); // hex == 255, ok == true int dec = str.toInt(&ok, 10); // dec == 0, ok == false //! [72] } void Widget::toLongFunction() { //! [73] QString str = "FF"; bool ok; long hex = str.toLong(&ok, 16); // hex == 255, ok == true long dec = str.toLong(&ok, 10); // dec == 0, ok == false //! [73] } void Widget::toLongLongFunction() { //! [74] QString str = "FF"; bool ok; qint64 hex = str.toLongLong(&ok, 16); // hex == 255, ok == true qint64 dec = str.toLongLong(&ok, 10); // dec == 0, ok == false //! [74] } void Widget::toLowerFunction() { //! [75] QString str = "Qt by NOKIA"; str = str.toLower(); // str == "qt by nokia" //! [75] } void Widget::toShortFunction() { //! [76] QString str = "FF"; bool ok; short hex = str.toShort(&ok, 16); // hex == 255, ok == true short dec = str.toShort(&ok, 10); // dec == 0, ok == false //! [76] } void Widget::toUIntFunction() { //! [77] QString str = "FF"; bool ok; uint hex = str.toUInt(&ok, 16); // hex == 255, ok == true uint dec = str.toUInt(&ok, 10); // dec == 0, ok == false //! [77] } void Widget::toULongFunction() { //! [78] QString str = "FF"; bool ok; ulong hex = str.toULong(&ok, 16); // hex == 255, ok == true ulong dec = str.toULong(&ok, 10); // dec == 0, ok == false //! [78] } void Widget::toULongLongFunction() { //! [79] QString str = "FF"; bool ok; quint64 hex = str.toULongLong(&ok, 16); // hex == 255, ok == true quint64 dec = str.toULongLong(&ok, 10); // dec == 0, ok == false //! [79] } void Widget::toUShortFunction() { //! [80] QString str = "FF"; bool ok; ushort hex = str.toUShort(&ok, 16); // hex == 255, ok == true ushort dec = str.toUShort(&ok, 10); // dec == 0, ok == false //! [80] } void Widget::toUpperFunction() { //! [81] QString str = "TeXt"; str = str.toUpper(); // str == "TEXT" //! [81] } void Widget::trimmedFunction() { //! [82] QString str = " lots\t of\nwhitespace\r\n "; str = str.trimmed(); // str == "lots\t of\nwhitespace" //! [82] } void Widget::truncateFunction() { //! [83] QString str = "Vladivostok"; str.truncate(4); // str == "Vlad" //! [83] } void Widget::plusEqualOperator() { //! [84] QString x = "free"; QString y = "dom"; x += y; // x == "freedom" //! [84] } void Widget::arrayOperator() { //! [85] QString str; if (str[0] == QChar('?')) str[0] = QChar('_'); //! [85] } void Widget::midRefFunction() { //! [midRef] QString x = "Nine pineapples"; QStringRef y = x.midRef(5, 4); // y == "pine" QStringRef z = x.midRef(5); // z == "pineapples" //! [midRef] } void Widget::leftRefFunction() { //! [leftRef] QString x = "Pineapple"; QStringRef y = x.leftRef(4); // y == "Pine" //! [leftRef] } void Widget::rightRefFunction() { //! [rightRef] QString x = "Pineapple"; QStringRef y = x.rightRef(5); // y == "apple" //! [rightRef] } int main(int argc, char *argv[]) { QApplication app(argc, argv); Widget widget; widget.show(); return app.exec(); }
generated by cgit v0.12 at 2025-08-11 02:07:54 (GMT)