DateConversion.cpp [plain text]
#include "config.h"
#include "DateConversion.h"
#include <wtf/Assertions.h>
#include <wtf/DateMath.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/text/WTFString.h>
#if OS(WINDOWS)
#include <windows.h>
#endif
using namespace WTF;
namespace JSC {
template<int width>
static inline void appendNumber(StringBuilder& builder, int value)
{
int fillingZerosCount = width;
if (value < 0) {
builder.append('-');
value = -value;
--fillingZerosCount;
}
String valueString = String::number(value);
fillingZerosCount -= valueString.length();
for (int i = 0; i < fillingZerosCount; ++i)
builder.append('0');
builder.append(valueString);
}
template<>
void appendNumber<2>(StringBuilder& builder, int value)
{
ASSERT(0 <= value && value <= 99);
builder.append(static_cast<char>('0' + value / 10));
builder.append(static_cast<char>('0' + value % 10));
}
String formatDateTime(const GregorianDateTime& t, DateTimeFormat format, bool asUTCVariant)
{
bool appendDate = format & DateTimeFormatDate;
bool appendTime = format & DateTimeFormatTime;
StringBuilder builder;
if (appendDate) {
builder.append(weekdayName[(t.weekDay() + 6) % 7]);
if (asUTCVariant) {
builder.appendLiteral(", ");
appendNumber<2>(builder, t.monthDay());
builder.append(' ');
builder.append(monthName[t.month()]);
} else {
builder.append(' ');
builder.append(monthName[t.month()]);
builder.append(' ');
appendNumber<2>(builder, t.monthDay());
}
builder.append(' ');
appendNumber<4>(builder, t.year());
}
if (appendDate && appendTime)
builder.append(' ');
if (appendTime) {
appendNumber<2>(builder, t.hour());
builder.append(':');
appendNumber<2>(builder, t.minute());
builder.append(':');
appendNumber<2>(builder, t.second());
builder.appendLiteral(" GMT");
if (!asUTCVariant) {
int offset = abs(t.utcOffset()) / 60;
builder.append(t.utcOffset() < 0 ? '-' : '+');
appendNumber<2>(builder, offset / 60);
appendNumber<2>(builder, offset % 60);
#if OS(WINDOWS)
TIME_ZONE_INFORMATION timeZoneInformation;
GetTimeZoneInformation(&timeZoneInformation);
const WCHAR* timeZoneName = t.isDST() ? timeZoneInformation.DaylightName : timeZoneInformation.StandardName;
#else
struct tm gtm = t;
char timeZoneName[70];
strftime(timeZoneName, sizeof(timeZoneName), "%Z", >m);
#endif
if (timeZoneName[0]) {
builder.appendLiteral(" (");
builder.append(timeZoneName);
builder.append(')');
}
}
}
return builder.toString().impl();
}
}