/* from js-harb (C) 2014-present  SheetJS */
var DBF = (function() {
var dbf_codepage_map = {
	/* Code Pages Supported by Visual FoxPro */
	/*::[*/0x01/*::]*/:   437,           /*::[*/0x02/*::]*/:   850,
	/*::[*/0x03/*::]*/:  1252,           /*::[*/0x04/*::]*/: 10000,
	/*::[*/0x64/*::]*/:   852,           /*::[*/0x65/*::]*/:   866,
	/*::[*/0x66/*::]*/:   865,           /*::[*/0x67/*::]*/:   861,
	/*::[*/0x68/*::]*/:   895,           /*::[*/0x69/*::]*/:   620,
	/*::[*/0x6A/*::]*/:   737,           /*::[*/0x6B/*::]*/:   857,
	/*::[*/0x78/*::]*/:   950,           /*::[*/0x79/*::]*/:   949,
	/*::[*/0x7A/*::]*/:   936,           /*::[*/0x7B/*::]*/:   932,
	/*::[*/0x7C/*::]*/:   874,           /*::[*/0x7D/*::]*/:  1255,
	/*::[*/0x7E/*::]*/:  1256,           /*::[*/0x96/*::]*/: 10007,
	/*::[*/0x97/*::]*/: 10029,           /*::[*/0x98/*::]*/: 10006,
	/*::[*/0xC8/*::]*/:  1250,           /*::[*/0xC9/*::]*/:  1251,
	/*::[*/0xCA/*::]*/:  1254,           /*::[*/0xCB/*::]*/:  1253,

	/* shapefile DBF extension */
	/*::[*/0x00/*::]*/: 20127,           /*::[*/0x08/*::]*/:   865,
	/*::[*/0x09/*::]*/:   437,           /*::[*/0x0A/*::]*/:   850,
	/*::[*/0x0B/*::]*/:   437,           /*::[*/0x0D/*::]*/:   437,
	/*::[*/0x0E/*::]*/:   850,           /*::[*/0x0F/*::]*/:   437,
	/*::[*/0x10/*::]*/:   850,           /*::[*/0x11/*::]*/:   437,
	/*::[*/0x12/*::]*/:   850,           /*::[*/0x13/*::]*/:   932,
	/*::[*/0x14/*::]*/:   850,           /*::[*/0x15/*::]*/:   437,
	/*::[*/0x16/*::]*/:   850,           /*::[*/0x17/*::]*/:   865,
	/*::[*/0x18/*::]*/:   437,           /*::[*/0x19/*::]*/:   437,
	/*::[*/0x1A/*::]*/:   850,           /*::[*/0x1B/*::]*/:   437,
	/*::[*/0x1C/*::]*/:   863,           /*::[*/0x1D/*::]*/:   850,
	/*::[*/0x1F/*::]*/:   852,           /*::[*/0x22/*::]*/:   852,
	/*::[*/0x23/*::]*/:   852,           /*::[*/0x24/*::]*/:   860,
	/*::[*/0x25/*::]*/:   850,           /*::[*/0x26/*::]*/:   866,
	/*::[*/0x37/*::]*/:   850,           /*::[*/0x40/*::]*/:   852,
	/*::[*/0x4D/*::]*/:   936,           /*::[*/0x4E/*::]*/:   949,
	/*::[*/0x4F/*::]*/:   950,           /*::[*/0x50/*::]*/:   874,
	/*::[*/0x57/*::]*/:  1252,           /*::[*/0x58/*::]*/:  1252,
	/*::[*/0x59/*::]*/:  1252,

	/*::[*/0xFF/*::]*/: 16969
};

/* TODO: find an actual specification */
function dbf_to_aoa(buf, opts)/*:AOA*/ {
	var out/*:AOA*/ = [];
	/* TODO: browser based */
	var d/*:Block*/ = (new_raw_buf(1)/*:any*/);
	switch(opts.type) {
		case 'base64': d = s2a(Base64.decode(buf)); break;
		case 'binary': d = s2a(buf); break;
		case 'buffer':
		case 'array': d = buf; break;
	}
	prep_blob(d, 0);
	/* header */
	var ft = d.read_shift(1);
	var memo = false;
	var vfp = false;
	switch(ft) {
		case 0x03: break;
		case 0x30: vfp = true; memo = true; break;
		case 0x31: vfp = true; break;
		case 0x83: memo = true; break;
		case 0x8B: memo = true; break;
		case 0xF5: memo = true; break;
		default: throw new Error("DBF Unsupported Version: " + ft.toString(16));
	}
	var filedate = new Date(d.read_shift(1) + 1900, d.read_shift(1) - 1, d.read_shift(1));
	var nrow = d.read_shift(4);
	var fpos = d.read_shift(2);
	var rlen = d.read_shift(2);
	d.l+=16;

	var flags = d.read_shift(1);
	//if(memo && ((flags & 0x02) === 0)) throw new Error("DBF Flags " + flags.toString(16) + " ft " + ft.toString(16));

	/* codepage present in FoxPro */
	var current_cp = 1252;
	if(d[d.l] !== 0) current_cp = dbf_codepage_map[d[d.l]];
	d.l+=1;

	d.l+=2;
	var fields = [], field = {};
	var hend = fpos - 10 - (vfp ? 264 : 0);
	while(d.l < hend) {
		field = {};
		field.name = cptable.utils.decode(current_cp, d.slice(d.l, d.l+10)).replace(/[\u0000\r\n].*$/g,"");
		d.l += 11;
		field.type = String.fromCharCode(d.read_shift(1));
		field.offset = d.read_shift(4);
		field.len = d.read_shift(1);
		field.dec = d.read_shift(1);
		if(field.name.length) fields.push(field);
		d.l += 14;
		switch(field.type) {
			// case 'B': break; // Binary
			case 'C': break; // character
			case 'D': break; // date
			case 'F': break; // floating point
			// case 'G': break; // General
			case 'I': break; // long
			case 'L': break; // boolean
			case 'M': break; // memo
			case 'N': break; // number
			// case 'O': break; // double
			// case 'P': break; // Picture
			case 'T': break; // datetime
			case 'Y': break; // currency
			case '0': break; // null ?
			case '+': break; // autoincrement
			case '@': break; // timestamp
			default: throw new Error('Unknown Field Type: ' + field.type);
		}
	}
	if(d[d.l] !== 0x0D) d.l = fpos-1;
	if(d.read_shift(1) !== 0x0D) throw new Error("DBF Terminator not found " + d.l + " " + d[d.l]);
	d.l = fpos;
	/* data */
	var R = 0, C = 0;
	out[0] = [];
	for(C = 0; C != fields.length; ++C) out[0][C] = fields[C].name;
	while(nrow-- > 0) {
		if(d[d.l] === 0x2A) { d.l+=rlen; continue; }
		++d.l;
		out[++R] = []; C = 0;
		for(C = 0; C != fields.length; ++C) {
			var dd = d.slice(d.l, d.l+fields[C].len); d.l+=fields[C].len;
			prep_blob(dd, 0);
			var s = cptable.utils.decode(current_cp, dd);
			switch(fields[C].type) {
				case 'C':
					out[R][C] = cptable.utils.decode(current_cp, dd);
					out[R][C] = out[R][C].trim();
					break;
				case 'D':
					if(s.length === 8) out[R][C] = new Date(+s.substr(0,4), +s.substr(4,2)-1, +s.substr(6,2));
					else out[R][C] = s;
					break;
				case 'F': out[R][C] = parseFloat(s.trim()); break;
				case 'I': out[R][C] = dd.read_shift(4, 'i'); break;
				case 'L': switch(s.toUpperCase()) {
					case 'Y': case 'T': out[R][C] = true; break;
					case 'N': case 'F': out[R][C] = false; break;
					case ' ': case '?': out[R][C] = false; break; /* NOTE: technically unitialized */
					default: throw new Error("DBF Unrecognized L:|" + s + "|");
					} break;
				case 'M': /* TODO: handle memo files */
					if(!memo) throw new Error("DBF Unexpected MEMO for type " + ft.toString(16));
					out[R][C] = "##MEMO##" + dd.read_shift(4);
					break;
				case 'N': out[R][C] = +s.replace(/\u0000/g,"").trim(); break;
				case 'T':
					var day = dd.read_shift(4), ms = dd.read_shift(4);
					throw new Error(day + " | " + ms);
					//out[R][C] = new Date(); // FIXME!!!
					//break;
				case 'Y': out[R][C] = dd.read(4,'i')/1e4; break;
				case '0':
					if(fields[C].name === '_NullFlags') break;
					/* falls through */
				default: throw new Error("DBF Unsupported data type " + fields[C].type);
			}
		}
	}
	if(d.l < d.length && d[d.l++] != 0x1A) throw new Error("DBF EOF Marker missing " + (d.l-1) + " of " + d.length + " " + d[d.l-1].toString(16));
	return out;
}

function dbf_to_sheet(buf, opts)/*:Worksheet*/ {
	var o = opts || {};
	if(!o.dateNF) o.dateNF = "yyyymmdd";
	return aoa_to_sheet(dbf_to_aoa(buf, o), o);
}

function dbf_to_workbook(buf, opts)/*:Workbook*/ {
	try { return sheet_to_workbook(dbf_to_sheet(buf, opts), opts); }
	catch(e) { if(opts && opts.WTF) throw e; }
	return ({SheetNames:[],Sheets:{}});
}
	return {
		to_workbook: dbf_to_workbook,
		to_sheet: dbf_to_sheet
	};
})();

var SYLK = (function() {
	/* TODO: find an actual specification */
	function sylk_to_aoa(d/*:RawData*/, opts)/*:AOA*/ {
		switch(opts.type) {
			case 'base64': return sylk_to_aoa_str(Base64.decode(d), opts);
			case 'binary': return sylk_to_aoa_str(d, opts);
			case 'buffer': return sylk_to_aoa_str(d.toString('binary'), opts);
			case 'array': return sylk_to_aoa_str(cc2str(d), opts);
		}
		throw new Error("Unrecognized type " + opts.type);
	}
	function sylk_to_aoa_str(str/*:string*/, opts)/*:AOA*/ {
		var records = str.split(/[\n\r]+/), R = -1, C = -1, ri = 0, rj = 0, arr = [];
		var formats = [];
		var next_cell_format = null;
		for (; ri !== records.length; ++ri) {
			var record = records[ri].trim().split(";");
			var RT = record[0], val;
			if(RT === 'P') for(rj=1; rj<record.length; ++rj) switch(record[rj].charAt(0)) {
				case 'P':
					formats.push(record[rj].substr(1));
					break;
			}
			else if(RT !== 'C' && RT !== 'F') continue;
			else for(rj=1; rj<record.length; ++rj) switch(record[rj].charAt(0)) {
				case 'Y':
					R = parseInt(record[rj].substr(1))-1; C = 0;
					for(var j = arr.length; j <= R; ++j) arr[j] = [];
					break;
				case 'X': C = parseInt(record[rj].substr(1))-1; break;
				case 'K':
					val = record[rj].substr(1);
					if(val.charAt(0) === '"') val = val.substr(1,val.length - 2);
					else if(val === 'TRUE') val = true;
					else if(val === 'FALSE') val = false;
					else if(+val === +val) {
						val = +val;
						if(next_cell_format !== null && next_cell_format.match(/[ymdhmsYMDHMS]/)) val = numdate(val);
					}
					arr[R][C] = val;
					next_cell_format = null;
					break;
				case 'P':
					if(RT !== 'F') break;
					next_cell_format = formats[parseInt(record[rj].substr(1))];
			}
		}
		return arr;
	}

	function sylk_to_sheet(str/*:string*/, opts)/*:Worksheet*/ { return aoa_to_sheet(sylk_to_aoa(str, opts), opts); }

	function sylk_to_workbook(str/*:string*/, opts)/*:Workbook*/ { return sheet_to_workbook(sylk_to_sheet(str, opts), opts); }

	function write_ws_cell_sylk(cell/*:Cell*/, ws/*:Worksheet*/, R/*:number*/, C/*:number*/, opts)/*:string*/ {
		var o = "C;Y" + (R+1) + ";X" + (C+1) + ";K";
		switch(cell.t) {
			case 'n': o += cell.v; break;
			case 'b': o += cell.v ? "TRUE" : "FALSE"; break;
			case 'e': o += cell.w || cell.v; break;
			case 'd': o += '"' + (cell.w || cell.v) + '"'; break;
			case 's': o += '"' + cell.v.replace(/"/g,"") + '"'; break;
		}
		return o;
	}

	function sheet_to_sylk(ws/*:Worksheet*/, opts/*:?any*/)/*:string*/ {
		var preamble/*:Array<string>*/ = ["ID;PWXL;N;E"], o/*:Array<string>*/ = [];
		preamble.push("P;PGeneral");
		var r = decode_range(ws['!ref']), cell/*:Cell*/;
		for(var R = r.s.r; R <= r.e.r; ++R) {
			for(var C = r.s.c; C <= r.e.c; ++C) {
				var coord = encode_cell({r:R,c:C});
				if(!(cell = ws[coord]) || cell.v == null) continue;
				o.push(write_ws_cell_sylk(cell, ws, R, C, opts));
			}
		}
		preamble.push("F;P0;DG0G8;M255");
		var RS = "\r\n";
		return preamble.join(RS) + RS + o.join(RS) + RS + "E" + RS;
	}

	return {
		to_workbook: sylk_to_workbook,
		to_sheet: sylk_to_sheet,
		from_sheet: sheet_to_sylk
	};
})();

var DIF = (function() {
	function dif_to_aoa(d/*:RawData*/, opts)/*:AOA*/ {
		switch(opts.type) {
			case 'base64': return dif_to_aoa_str(Base64.decode(d), opts);
			case 'binary': return dif_to_aoa_str(d, opts);
			case 'buffer': return dif_to_aoa_str(d.toString('binary'), opts);
			case 'array': return dif_to_aoa_str(cc2str(d), opts);
		}
		throw new Error("Unrecognized type " + opts.type);
	}
	function dif_to_aoa_str(str/*:string*/, opts)/*:AOA*/ {
		var records = str.split('\n'), R = -1, C = -1, ri = 0, arr = [];
		for (; ri !== records.length; ++ri) {
			if (records[ri].trim() === 'BOT') { arr[++R] = []; C = 0; continue; }
			if (R < 0) continue;
			var metadata = records[ri].trim().split(",");
			var type = metadata[0], value = metadata[1];
			++ri;
			var data = records[ri].trim();
			switch (+type) {
				case -1:
					if (data === 'BOT') { arr[++R] = []; C = 0; continue; }
					else if (data !== 'EOD') throw new Error("Unrecognized DIF special command " + data);
					break;
				case 0:
					if(data === 'TRUE') arr[R][C] = true;
					else if(data === 'FALSE') arr[R][C] = false;
					else if(+value == +value) arr[R][C] = +value;
					else if(!isNaN(new Date(value).getDate())) arr[R][C] = new Date(value);
					else arr[R][C] = value;
					++C; break;
				case 1:
					data = data.substr(1,data.length-2);
					arr[R][C++] = data !== '' ? data : null;
					break;
			}
			if (data === 'EOD') break;
		}
		return arr;
	}

	function dif_to_sheet(str/*:string*/, opts)/*:Worksheet*/ { return aoa_to_sheet(dif_to_aoa(str, opts), opts); }
	function dif_to_workbook(str/*:string*/, opts)/*:Workbook*/ { return sheet_to_workbook(dif_to_sheet(str, opts), opts); }

	var sheet_to_dif = (function() {
		var push_field = function pf(o/*:Array<string>*/, topic/*:string*/, v/*:number*/, n/*:number*/, s/*:string*/) {
			o.push(topic);
			o.push(v + "," + n);
			o.push('"' + s.replace(/"/g,'""') + '"');
		};
		var push_value = function po(o/*:Array<string>*/, type/*:number*/, v/*:number*/, s/*:string*/) {
			o.push(type + "," + v);
			o.push(type == 1 ? '"' + s.replace(/"/g,'""') + '"' : s);
		};
		return function sheet_to_dif(ws/*:Worksheet*/, opts/*:?any*/)/*:string*/ {
			var o/*:Array<string>*/ = [];
			var r = decode_range(ws['!ref']), cell/*:Cell*/;
			push_field(o, "TABLE", 0, 1, "sheetjs");
			push_field(o, "VECTORS", 0, r.e.r - r.s.r + 1,"");
			push_field(o, "TUPLES", 0, r.e.c - r.s.c + 1,"");
			push_field(o, "DATA", 0, 0,"");
			for(var R = r.s.r; R <= r.e.r; ++R) {
				push_value(o, -1, 0, "BOT");
				for(var C = r.s.c; C <= r.e.c; ++C) {
					var coord = encode_cell({r:R,c:C});
					if(!(cell = ws[coord]) || cell.v == null) { push_value(o, 1, 0, ""); continue;}
					switch(cell.t) {
						case 'n': push_value(o, 0, (/*cell.w ||*/ cell.v), "V"); break;
						case 'b': push_value(o, 0, cell.v ? 1 : 0, cell.v ? "TRUE" : "FALSE"); break;
						case 's': push_value(o, 1, 0, cell.v); break;
						default: push_value(o, 1, 0, "");
					}
				}
			}
			push_value(o, -1, 0, "EOD");
			var RS = "\r\n";
			var oo = o.join(RS);
			//while((oo.length & 0x7F) != 0) oo += "\0";
			return oo;
		};
	})();
	return {
		to_workbook: dif_to_workbook,
		to_sheet: dif_to_sheet,
		from_sheet: sheet_to_dif
	};
})();