function d3_dsv(delimiter, mimeType) {

var reParse = new RegExp("\r\n|[" + delimiter + "\r\n]", "g"), // field separator regex

reFormat = new RegExp("[\"" + delimiter + "\n]"),

delimiterCode = delimiter.charCodeAt(0);

function dsv(url, callback) {

d3.text(url, mimeType, function(text) {

callback(text && dsv.parse(text));

});

}

dsv.parse = function(text) {

var header;

return dsv.parseRows(text, function(row, i) {

if (i) {

var o = {}, j = -1, m = header.length;

while (++j < m) o[header[j]] = row[j];

return o;

} else {

header = row;

return null;

}

});

};

dsv.parseRows = function(text, f) {

var EOL = {}, // sentinel value for end-of-line

EOF = {}, // sentinel value for end-of-file

rows = [], // output rows

n = 0, // the current line number

t, // the current token

eol; // is the current token followed by EOL?

reParse.lastIndex = 0; // work-around bug in FF 3.6

function token() {

if (reParse.lastIndex >= text.length) return EOF; // special case: end of file

if (eol) { eol = false; return EOL; } // special case: end of line

// special case: quotes

var j = reParse.lastIndex;

if (text.charCodeAt(j) === 34) {

var i = j;

while (i++ < text.length) {

if (text.charCodeAt(i) === 34) {

if (text.charCodeAt(i + 1) !== 34) break;

i++;

}

}

reParse.lastIndex = i + 2;

var c = text.charCodeAt(i + 1);

if (c === 13) {

eol = true;

if (text.charCodeAt(i + 2) === 10) reParse.lastIndex++;

} else if (c === 10) {

eol = true;

}

return text.substring(j + 1, i).replace(/""/g, "\"");

}

// common case

var m = reParse.exec(text);

if (m) {

eol = m[0].charCodeAt(0) !== delimiterCode;

return text.substring(j, m.index);

}

reParse.lastIndex = text.length;

return text.substring(j);

}

while ((t = token()) !== EOF) {

var a = [];

while (t !== EOL && t !== EOF) {

a.push(t);

t = token();

}

if (f && !(a = f(a, n++))) continue;

rows.push(a);

}

return rows;

};

dsv.format = function(rows) {

return rows.map(formatRow).join("\n");

};

function formatRow(row) {

return row.map(formatValue).join(delimiter);

}

function formatValue(text) {

return reFormat.test(text) ? "\"" + text.replace(/\"/g, "\"\"") + "\"" : text;

}

return dsv;

}