Aegisub/aegilib/src/time.cpp

// Copyright (c) 2008, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of the Aegisub Group nor the names of its contributors
//     may be used to endorse or promote products derived from this software
//     without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// -----------------------------------------------------------------------------
//
// AEGISUB/ATHENASUB
//
// Website: http://www.aegisub.net
// Contact: mailto:amz@aegisub.net
//

#include "Athenasub.h"
using namespace Athenasub;


//////////////////////
// Generates a string
String Time::GetString(int ms_precision,int h_precision) const
{
	// Enforce sanity
	ms_precision = Mid(0,ms_precision,3);
	h_precision = Mid(0,h_precision,2);

	// Generate values
	int _ms = ms;
	int h = _ms / 3600000;
	_ms -= h*3600000;
	int min = _ms / 60000;
	_ms -= min*60000;
	int s = _ms / 1000;
	_ms -= s*1000;

	// Cap hour value
	if (h > 9 && h_precision == 1) {
		h = 9;
		min = 59;
		s = 59;
		_ms = 999;
	}

	// Modify ms to account for precision
	if (ms_precision == 2) _ms /= 10;
	else if (ms_precision == 1) _ms /= 100;
	else if (ms_precision == 0) _ms = 0;

	// Old code
	if (false) {
		// Generate mask string
		wxString mask = wxString::Format(_T("%%0%ii:%%0%ii:%%0%ii.%%0%ii"),h_precision,2,2,ms_precision);

		// Generate final string
		wxString final = wxString::Format(mask,h,min,s,_ms);

		// Done
		return final;
	}

	// New code
	else {
		// Get write buffer
		wxString final;
		size_t size = 7+h_precision+ms_precision;
		size_t pos = 0;
		wxChar *buffer = final.GetWriteBuf(size);
		wxChar temp[16];

		// Write time
		WriteNumber(buffer,temp,h,h_precision,pos);
		WriteChar(buffer,_T(':'),pos);
		WriteNumber(buffer,temp,min,2,pos);
		WriteChar(buffer,_T(':'),pos);
		WriteNumber(buffer,temp,s,2,pos);
		WriteChar(buffer,_T('.'),pos);
		WriteNumber(buffer,temp,_ms,ms_precision,pos);

		// Write terminator
		WriteText(buffer,_T("\0"),1,pos);

		// Restore string's state and return
		final.UngetWriteBuf(pos-1);
		return final;
	}
}


///////////////////
// Parses a string
void Time::Parse(const String &data)
{
	// Break into an array of values
	array<size_t,4> values;
	size_t last = 0;
	size_t len = data.Length();
	size_t curIndex = 0;
	wxChar cur = 0;
	for (size_t i=0;i<len;i++) {
		cur = data[i];
		if (cur == ':' || cur == '.' || cur == ',' || cur == ';') {
			values.at(curIndex++) = SubStringToInteger(data,last,i);
			last = i+1;
		}
		if (i == len-1) {
			int value = SubStringToInteger(data,last,len);
			size_t digits = len - last;
			if (digits == 2) value *= 10;
			if (digits == 1) value *= 100;
			values.at(curIndex++) = value;
		}
	}

	// Turn into milliseconds
	size_t mult[] = { 0, 1, 1000, 60000, 3600000 };
	size_t accum = 0;
	for (int i=(int)curIndex;--i>=0;) {
		accum += values[i] * mult[curIndex-i];
	}
	ms = (int)accum;
}