latest SDK

foobar2000/helpers/filetimetools.cpp

@@ -0,0 +1,103 @@
+#include "stdafx.h"
+
+
+#ifndef _WIN32
+#error PORTME
+#endif
+
+#include "filetimetools.h"
+
+static bool is_spacing(char c) {return c == ' ' || c==10 || c==13 || c == '\t';}
+
+static bool is_spacing(const char * str, t_size len) {
+	for(t_size walk = 0; walk < len; ++walk) if (!is_spacing(str[walk])) return false;
+	return true;
+}
+
+typedef exception_io_data exception_time_error;
+
+static unsigned ParseDateElem(const char * ptr, t_size len) {
+	unsigned ret = 0;
+	for(t_size walk = 0; walk < len; ++walk) {
+		const char c = ptr[walk];
+		if (c < '0' || c > '9') throw exception_time_error();
+		ret = ret * 10 + (unsigned)(c - '0');
+	}
+	return ret;
+}
+
+t_filetimestamp foobar2000_io::filetimestamp_from_string(const char * date) {
+	// Accepted format
+	// YYYY-MM-DD HH:MM:SS
+	try {
+		t_size remaining = strlen(date);
+		SYSTEMTIME st = {};
+		st.wDay = 1; st.wMonth = 1;
+		for(;;) {
+#define ADVANCE(n) { PFC_ASSERT( remaining >= n); date += n; remaining -= n; }
+#define ADVANCE_TEST(n) { if (remaining < n) throw exception_time_error(); }
+#define PARSE(var, digits) { ADVANCE_TEST(digits); var = (WORD) ParseDateElem(date, digits); ADVANCE(digits) ; }
+#define TEST_END( durationIncrement ) 
+#define SKIP(c) { ADVANCE_TEST(1); if (date[0] != c) throw exception_time_error(); ADVANCE(1); }
+#define SKIP_SPACING() {while(remaining > 0 && is_spacing(*date)) ADVANCE(1);}
+			SKIP_SPACING();
+			PARSE( st.wYear, 4 ); if (st.wYear < 1601) throw exception_time_error();
+			TEST_END(wYear); SKIP('-');
+			PARSE( st.wMonth, 2 ); if (st.wMonth < 1 || st.wMonth > 12) throw exception_time_error();
+			TEST_END(wMonth); SKIP('-');
+			PARSE( st.wDay, 2); if (st.wDay < 1 || st.wDay > 31) throw exception_time_error();
+			TEST_END(wDay); SKIP(' ');
+			PARSE( st.wHour, 2); if (st.wHour >= 24) throw exception_time_error();
+			TEST_END(wHour); SKIP(':');
+			PARSE( st.wMinute, 2); if (st.wMinute >= 60) throw exception_time_error();
+			TEST_END(wMinute); SKIP(':');
+			PARSE( st.wSecond, 2); if (st.wSecond >= 60) throw exception_time_error();
+			SKIP_SPACING();
+			TEST_END( wSecond );
+#undef ADVANCE
+#undef ADVANCE_TEST
+#undef PARSE
+#undef TEST_END
+#undef SKIP
+#undef SKIP_SPACING
+			if (remaining > 0) throw exception_time_error();
+			break;
+		}
+		t_filetimestamp base, out;
+		if (!SystemTimeToFileTime(&st, (FILETIME*) &base)) throw exception_time_error();
+		if (!LocalFileTimeToFileTime((const FILETIME*)&base, (FILETIME*)&out)) throw exception_time_error();
+		return out;
+	} catch(exception_time_error) {
+		return filetimestamp_invalid;
+	}
+}
+
+static const char g_invalidMsg[] = "<invalid timestamp>";
+
+format_filetimestamp::format_filetimestamp(t_filetimestamp p_timestamp) {
+	try {
+		SYSTEMTIME st; FILETIME ft;
+		if (FileTimeToLocalFileTime((FILETIME*)&p_timestamp,&ft)) {
+			if (FileTimeToSystemTime(&ft,&st)) {
+				m_buffer 
+					<< pfc::format_uint(st.wYear,4) << "-" << pfc::format_uint(st.wMonth,2) << "-" << pfc::format_uint(st.wDay,2) << " " 
+					<< pfc::format_uint(st.wHour,2) << ":" << pfc::format_uint(st.wMinute,2) << ":" << pfc::format_uint(st.wSecond,2);
+				return;
+			}
+		}
+	} catch(...) {}
+	m_buffer = g_invalidMsg;
+}
+
+format_filetimestamp_utc::format_filetimestamp_utc(t_filetimestamp p_timestamp) {
+	try {
+		SYSTEMTIME st;
+		if (FileTimeToSystemTime((const FILETIME*)&p_timestamp,&st)) {
+			m_buffer 
+				<< pfc::format_uint(st.wYear,4) << "-" << pfc::format_uint(st.wMonth,2) << "-" << pfc::format_uint(st.wDay,2) << " " 
+				<< pfc::format_uint(st.wHour,2) << ":" << pfc::format_uint(st.wMinute,2) << ":" << pfc::format_uint(st.wSecond,2);
+			return;
+		} 
+	} catch(...) {}
+	m_buffer = g_invalidMsg;
+}