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Copy pathvbytearray.cpp
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234 lines (191 loc) · 4.09 KB
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#include "vbytearray.h"
#include <cmath>
#include <stdint.h>
namespace
{
inline double roundDouble(double x)
{
return x < 0.0 ? ceil(x - 0.5) : floor(x + 0.5);
}
} // namespace
VByteArray::VByteArray()
{
}
VByteArray::VByteArray(const QByteArray &data) : QByteArray(data)
{
}
void VByteArray::vbAppendInt32(qint32 number)
{
QByteArray data;
data.append((char)((number >> 24) & 0xFF));
data.append((char)((number >> 16) & 0xFF));
data.append((char)((number >> 8) & 0xFF));
data.append((char)(number & 0xFF));
append(data);
}
void VByteArray::vbAppendUint32(quint32 number)
{
QByteArray data;
data.append((char)((number >> 24) & 0xFF));
data.append((char)((number >> 16) & 0xFF));
data.append((char)((number >> 8) & 0xFF));
data.append((char)(number & 0xFF));
append(data);
}
void VByteArray::vbAppendInt16(qint16 number)
{
QByteArray data;
data.append((char)((number >> 8) & 0xFF));
data.append((char)(number & 0xFF));
append(data);
}
void VByteArray::vbAppendUint16(quint16 number)
{
QByteArray data;
data.append((char)((number >> 8) & 0xFF));
data.append((char)(number & 0xFF));
append(data);
}
void VByteArray::vbAppendInt8(qint8 number)
{
append((char)number);
}
void VByteArray::vbAppendUint8(quint8 number)
{
append((char)number);
}
void VByteArray::vbAppendDouble32(double number, double scale)
{
vbAppendInt32((qint32)roundDouble(number * scale));
}
void VByteArray::vbAppendDouble16(double number, double scale)
{
vbAppendInt16((qint16)roundDouble(number * scale));
}
void VByteArray::vbAppendDouble32Auto(double number)
{
int e = 0;
float fr = frexpf(number, &e);
float fr_abs = fabsf(fr);
uint32_t fr_s = 0;
if (fr_abs >= 0.5)
{
fr_s = (uint32_t)((fr_abs - 0.5f) * 2.0f * 8388608.0f);
e += 126;
}
uint32_t res = ((e & 0xFF) << 23) | (fr_s & 0x7FFFFF);
if (fr < 0)
{
res |= 1 << 31;
}
vbAppendUint32(res);
}
void VByteArray::vbAppendString(QString str)
{
append(str.toLocal8Bit());
append((char)0);
}
qint32 VByteArray::vbPopFrontInt32()
{
if (size() < 4)
{
return 0;
}
qint32 res = ((quint8)at(0)) << 24 |
((quint8)at(1)) << 16 |
((quint8)at(2)) << 8 |
((quint8)at(3));
remove(0, 4);
return res;
}
quint32 VByteArray::vbPopFrontUint32()
{
if (size() < 4)
{
return 0;
}
quint32 res = ((quint8)at(0)) << 24 |
((quint8)at(1)) << 16 |
((quint8)at(2)) << 8 |
((quint8)at(3));
remove(0, 4);
return res;
}
qint16 VByteArray::vbPopFrontInt16()
{
if (size() < 2)
{
return 0;
}
qint16 res = ((quint8)at(0)) << 8 |
((quint8)at(1));
remove(0, 2);
return res;
}
quint16 VByteArray::vbPopFrontUint16()
{
if (size() < 2)
{
return 0;
}
quint16 res = ((quint8)at(0)) << 8 |
((quint8)at(1));
remove(0, 2);
return res;
}
qint8 VByteArray::vbPopFrontInt8()
{
if (size() < 1)
{
return 0;
}
qint8 res = (quint8)at(0);
remove(0, 1);
return res;
}
quint8 VByteArray::vbPopFrontUint8()
{
if (size() < 1)
{
return 0;
}
quint8 res = (quint8)at(0);
remove(0, 1);
return res;
}
double VByteArray::vbPopFrontDouble32(double scale)
{
return (double)vbPopFrontInt32() / scale;
}
double VByteArray::vbPopFrontDouble16(double scale)
{
return (double)vbPopFrontInt16() / scale;
}
double VByteArray::vbPopFrontDouble32Auto()
{
uint32_t res = vbPopFrontUint32();
int e = (res >> 23) & 0xFF;
int fr = res & 0x7FFFFF;
bool negative = res & (1 << 31);
float f = 0.0;
if (e != 0 || fr != 0)
{
f = (float)fr / (8388608.0 * 2.0) + 0.5;
e -= 126;
}
if (negative)
{
f = -f;
}
return ldexpf(f, e);
}
QString VByteArray::vbPopFrontString()
{
if (size() < 1)
{
return QString();
}
QString str(data());
remove(0, str.size() + 1);
return str;
}