diff options
Diffstat (limited to 'Src/Plugins/Library/ml_wire/RFCDate.cpp')
| -rw-r--r-- | Src/Plugins/Library/ml_wire/RFCDate.cpp | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/Src/Plugins/Library/ml_wire/RFCDate.cpp b/Src/Plugins/Library/ml_wire/RFCDate.cpp new file mode 100644 index 00000000..ab57f9af --- /dev/null +++ b/Src/Plugins/Library/ml_wire/RFCDate.cpp @@ -0,0 +1,216 @@ +#include "main.h" +#include "RFCDate.h" +#include <strsafe.h> + +void MakeDateString(__time64_t convertTime, wchar_t *date_str, size_t len) +{ + SYSTEMTIME sysTime = {0}; + tm *newtime = _localtime64(&convertTime); + + sysTime.wYear = newtime->tm_year + 1900; + sysTime.wMonth = newtime->tm_mon + 1; + sysTime.wDayOfWeek = newtime->tm_wday; + sysTime.wDay = newtime->tm_mday; + sysTime.wHour = newtime->tm_hour; + sysTime.wMinute = newtime->tm_min; + sysTime.wSecond = newtime->tm_sec; + + GetDateFormat(LOCALE_USER_DEFAULT, DATE_SHORTDATE, &sysTime, NULL, date_str, (int)len); + +} + +void MakeRFCDateString(__time64_t convertTime, wchar_t *data_str, size_t len) +{ + SYSTEMTIME sysTime = {0}; + tm *newtime = _gmtime64(&convertTime); + + sysTime.wYear = newtime->tm_year + 1900; + sysTime.wMonth = newtime->tm_mon + 1; + sysTime.wDayOfWeek = newtime->tm_wday; + sysTime.wDay = newtime->tm_mday; + sysTime.wHour = newtime->tm_hour; + sysTime.wMinute = newtime->tm_min; + sysTime.wSecond = newtime->tm_sec; + + wchar_t rfcDate[64] = {0}, rfcTime[64] = {0}; + GetDateFormat(MAKELCID(MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT), 0, &sysTime, L"ddd',' d MMM yyyy ", rfcDate, 64); + GetTimeFormat(MAKELCID(MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT), 0, &sysTime, L"HH':'mm':'ss 'GMT'", rfcTime, 64); + StringCchPrintf(data_str,len,L"%s%s",rfcDate,rfcTime); +} + +static int getMonthOfYear(const wchar_t *str); +static int validateTime(struct tm *tmloc, int gmoffset); +static const wchar_t *getNextField(const wchar_t *pos); +static int getGMOffset(const wchar_t *str); + +enum +{ + DAY_OF_MONTH = 0, + MONTH_OF_YEAR, + YEAR, + TIME, + TIMEZONE, + DATE_END +}; + +__time64_t MakeRFCDate(const wchar_t *date) +{ + __time64_t result = 0; + const wchar_t *pos = date; + tm tmloc = {0}; + const wchar_t *strmin; + const wchar_t *strsec; + int gmoffset = 1; + int state = DAY_OF_MONTH; + tzset(); + /* skip weekday if present */ + while (pos && *pos && !iswdigit(*pos)) pos++; + + do + { + switch (state) + { + case DAY_OF_MONTH: + tmloc.tm_mday = _wtoi(pos); + break; + case MONTH_OF_YEAR: + tmloc.tm_mon = getMonthOfYear(pos); + break; + case YEAR: + { + /* TODO: we're only accepting 4-digit dates...*/ + const wchar_t *test = pos; int numDigits = 0; + while (iswdigit(*test) && *test) { test++; numDigits++; } + if (numDigits == 2) // let's hope we never have 2 digit years! + tmloc.tm_year = _wtoi(pos) + 100; // assume 2 digit years are 20xx + else + tmloc.tm_year = _wtoi(pos) - 1900; + } + break; + case TIME: + strmin = wcschr(pos, L':'); + strsec = strmin ? wcschr(strmin + 1, L':') : 0; + + tmloc.tm_hour = _wtoi(pos); + if (!strmin) return _time64(0); + tmloc.tm_min = _wtoi(strmin + 1); + if (!strsec) return _time64(0); + tmloc.tm_sec = _wtoi(strsec + 1); + break; + case TIMEZONE: + gmoffset = getGMOffset(pos); + break; + case DATE_END: + pos = 0; + break; + } + + state++; + } + while ((pos = getNextField(pos))); + + tmloc.tm_isdst = 0; //_daylight; + + if (validateTime(&tmloc, gmoffset)) + { + result = _mktime64(&tmloc) - _timezone; + //if (_daylight) + } + + return result; +} + +const wchar_t *getNextField(const wchar_t *pos) +{ + if (!pos) + return 0; + while (pos && *pos && !iswspace(*pos)) pos++; + while (pos && *pos && iswspace(*pos)) pos++; + + return ((pos && *pos) ? pos : 0); +} + +int validateTime(struct tm *tmloc, int gmoffset) +{ + int result = 1; + + if (tmloc->tm_mday < 1 || tmloc->tm_mday > 31 || + tmloc->tm_mon < 0 || tmloc->tm_mon > 11 || + tmloc->tm_year < 0 || tmloc->tm_year > 2000 || + tmloc->tm_hour < 0 || tmloc->tm_hour > 23 || + tmloc->tm_min < 0 || tmloc->tm_min > 59 || + tmloc->tm_sec < 0 || tmloc->tm_sec > 59 || + gmoffset == 1) + result = 0; + + return result; +} + +int getMonthOfYear(const wchar_t *str) +{ + int mon = -1; + /* This is not the most efficient way to determine + the month (we could use integer comparisons, for instance) + but I don't think this will be a performance bottleneck :) + */ + + if (!wcsnicmp(str, L"Jan", 3)) + mon = 0; + else if (!wcsnicmp(str, L"Feb", 3)) + mon = 1; + else if (!wcsnicmp(str, L"Mar", 3)) + mon = 2; + else if (!wcsnicmp(str, L"Apr", 3)) + mon = 3; + else if (!wcsnicmp(str, L"May", 3)) + mon = 4; + else if (!wcsnicmp(str, L"Jun", 3)) + mon = 5; + else if (!wcsnicmp(str, L"Jul", 3)) + mon = 6; + else if (!wcsnicmp(str, L"Aug", 3)) + mon = 7; + else if (!wcsnicmp(str, L"Sep", 3)) + mon = 8; + else if (!wcsnicmp(str, L"Oct", 3)) + mon = 9; + else if (!wcsnicmp(str, L"Nov", 3)) + mon = 10; + else if (!wcsnicmp(str, L"Dec", 3)) + mon = 11; + + return mon; +} + +int getGMOffset(const wchar_t *str) +{ + int secs = 0; + /* See note in getMonthOfYear() */ + + if (!wcsnicmp(str, L"UT", 2) || !wcsnicmp(str, L"GMT", 3)) + secs = 0; + else if (!wcsnicmp(str, L"EDT", 3)) + secs = -4 * 3600; + else if (!wcsnicmp(str, L"PST", 3)) + secs = -8 * 3600; + else if (!wcsnicmp(str, L"EST", 3) || !wcsnicmp(str, L"CDT", 3)) + secs = -5 * 3600; + else if (!wcsnicmp(str, L"MST", 3) || !wcsnicmp(str, L"PDT", 3)) + secs = -7 * 3600; + else if (!wcsnicmp(str, L"CST", 3) || !wcsnicmp(str, L"MDT", 3)) + secs = -6 * 3600; + else if ( (str[0] == L'+' || str[0] == L'-') && + iswdigit(str[1]) && iswdigit(str[2]) && + iswdigit(str[3]) && iswdigit(str[4])) + { + secs = 3600 * (10 * (str[1] - 48) + str[2] - 48); + secs += 60 * (10 * (str[3] - 48) + str[4] - 48); + + if (str[0] == L'-') + secs = -secs; + } + else + secs = 1; + + return secs; +}
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