1 files changed, 183 insertions, 0 deletions
diff --git a/deps/npm/node_modules/extsprintf/lib/extsprintf.js b/deps/npm/node_modules/extsprintf/lib/extsprintf.js
new file mode 100644
index 0000000000..ed883d32b9
--- /dev/null
+++ b/deps/npm/node_modules/extsprintf/lib/extsprintf.js
@@ -0,0 +1,183 @@
+/*
+ * extsprintf.js: extended POSIX-style sprintf
+ */
+
+var mod_assert = require('assert');
+var mod_util = require('util');
+
+/*
+ * Public interface
+ */
+exports.sprintf = jsSprintf;
+exports.printf = jsPrintf;
+exports.fprintf = jsFprintf;
+
+/*
+ * Stripped down version of s[n]printf(3c).  We make a best effort to throw an
+ * exception when given a format string we don't understand, rather than
+ * ignoring it, so that we won't break existing programs if/when we go implement
+ * the rest of this.
+ *
+ * This implementation currently supports specifying
+ *	- field alignment ('-' flag),
+ * 	- zero-pad ('0' flag)
+ *	- always show numeric sign ('+' flag),
+ *	- field width
+ *	- conversions for strings, decimal integers, and floats (numbers).
+ *	- argument size specifiers.  These are all accepted but ignored, since
+ *	  Javascript has no notion of the physical size of an argument.
+ *
+ * Everything else is currently unsupported, most notably precision, unsigned
+ * numbers, non-decimal numbers, and characters.
+ */
+function jsSprintf(fmt)
+{
+	var regex = [
+	    '([^%]*)',				/* normal text */
+	    '%',				/* start of format */
+	    '([\'\\-+ #0]*?)',			/* flags (optional) */
+	    '([1-9]\\d*)?',			/* width (optional) */
+	    '(\\.([1-9]\\d*))?',		/* precision (optional) */
+	    '[lhjztL]*?',			/* length mods (ignored) */
+	    '([diouxXfFeEgGaAcCsSp%jr])'	/* conversion */
+	].join('');
+
+	var re = new RegExp(regex);
+	var args = Array.prototype.slice.call(arguments, 1);
+	var flags, width, precision, conversion;
+	var left, pad, sign, arg, match;
+	var ret = '';
+	var argn = 1;
+
+	mod_assert.equal('string', typeof (fmt));
+
+	while ((match = re.exec(fmt)) !== null) {
+		ret += match[1];
+		fmt = fmt.substring(match[0].length);
+
+		flags = match[2] || '';
+		width = match[3] || 0;
+		precision = match[4] || '';
+		conversion = match[6];
+		left = false;
+		sign = false;
+		pad = ' ';
+
+		if (conversion == '%') {
+			ret += '%';
+			continue;
+		}
+
+		if (args.length === 0)
+			throw (new Error('too few args to sprintf'));
+
+		arg = args.shift();
+		argn++;
+
+		if (flags.match(/[\' #]/))
+			throw (new Error(
+			    'unsupported flags: ' + flags));
+
+		if (precision.length > 0)
+			throw (new Error(
+			    'non-zero precision not supported'));
+
+		if (flags.match(/-/))
+			left = true;
+
+		if (flags.match(/0/))
+			pad = '0';
+
+		if (flags.match(/\+/))
+			sign = true;
+
+		switch (conversion) {
+		case 's':
+			if (arg === undefined || arg === null)
+				throw (new Error('argument ' + argn +
+				    ': attempted to print undefined or null ' +
+				    'as a string'));
+			ret += doPad(pad, width, left, arg.toString());
+			break;
+
+		case 'd':
+			arg = Math.floor(arg);
+			/*jsl:fallthru*/
+		case 'f':
+			sign = sign && arg > 0 ? '+' : '';
+			ret += sign + doPad(pad, width, left,
+			    arg.toString());
+			break;
+
+		case 'x':
+			ret += doPad(pad, width, left, arg.toString(16));
+			break;
+
+		case 'j': /* non-standard */
+			if (width === 0)
+				width = 10;
+			ret += mod_util.inspect(arg, false, width);
+			break;
+
+		case 'r': /* non-standard */
+			ret += dumpException(arg);
+			break;
+
+		default:
+			throw (new Error('unsupported conversion: ' +
+			    conversion));
+		}
+	}
+
+	ret += fmt;
+	return (ret);
+}
+
+function jsPrintf() {
+	var args = Array.prototype.slice.call(arguments);
+	args.unshift(process.stdout);
+	jsFprintf.apply(null, args);
+}
+
+function jsFprintf(stream) {
+	var args = Array.prototype.slice.call(arguments, 1);
+	return (stream.write(jsSprintf.apply(this, args)));
+}
+
+function doPad(chr, width, left, str)
+{
+	var ret = str;
+
+	while (ret.length < width) {
+		if (left)
+			ret += chr;
+		else
+			ret = chr + ret;
+	}
+
+	return (ret);
+}
+
+/*
+ * This function dumps long stack traces for exceptions having a cause() method.
+ * See node-verror for an example.
+ */
+function dumpException(ex)
+{
+	var ret;
+
+	if (!(ex instanceof Error))
+		throw (new Error(jsSprintf('invalid type for %%r: %j', ex)));
+
+	/* Note that V8 prepends "ex.stack" with ex.toString(). */
+	ret = 'EXCEPTION: ' + ex.constructor.name + ': ' + ex.stack;
+
+	if (ex.cause && typeof (ex.cause) === 'function') {
+		var cex = ex.cause();
+		if (cex) {
+			ret += '\nCaused by: ' + dumpException(cex);
+		}
+	}
+
+	return (ret);
+}