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(function(){d3.csv = function(url, callback) {
d3.text(url, "text/csv", function(text) {
callback(text && d3.csv.parse(text));
});
};
d3.csv.parse = function(text) {
var header;
return d3.csv.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;
}
});
};
d3.csv.parseRows = function(text, f) {
var EOL = {}, // sentinel value for end-of-line
EOF = {}, // sentinel value for end-of-file
rows = [], // output rows
re = /\r\n|[,\r\n]/g, // field separator regex
n = 0, // the current line number
t, // the current token
eol; // is the current token followed by EOL?
re.lastIndex = 0; // work-around bug in FF 3.6
/** @private Returns the next token. */
function token() {
if (re.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 = re.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++;
}
}
re.lastIndex = i + 2;
var c = text.charCodeAt(i + 1);
if (c === 13) {
eol = true;
if (text.charCodeAt(i + 2) === 10) re.lastIndex++;
} else if (c === 10) {
eol = true;
}
return text.substring(j + 1, i).replace(/""/g, "\"");
}
// common case
var m = re.exec(text);
if (m) {
eol = m[0].charCodeAt(0) !== 44;
return text.substring(j, m.index);
}
re.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;
};
d3.csv.format = function(rows) {
return rows.map(d3_csv_formatRow).join("\n");
};
function d3_csv_formatRow(row) {
return row.map(d3_csv_formatValue).join(",");
}
function d3_csv_formatValue(text) {
return /[",\n]/.test(text)
? "\"" + text.replace(/\"/g, "\"\"") + "\""
: text;
}
})();
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