xsprintf.php
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xsprintf.php
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			<?php

			/*
			* Copyright 2011 Facebook, Inc.
			*
			* Licensed under the Apache License, Version 2.0 (the "License");
			* you may not use this file except in compliance with the License.
			* You may obtain a copy of the License at
			*
			* http://www.apache.org/licenses/LICENSE-2.0
			*
			* Unless required by applicable law or agreed to in writing, software
			* distributed under the License is distributed on an "AS IS" BASIS,
			* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
			* See the License for the specific language governing permissions and
			* limitations under the License.
			*/

			/**
			* Parse a printf()-style format string in an extensible way.
			*
			* This method allows you to build a function with printf() semantics but
			* custom conversions for different datatypes. Two examples are jsprintf()
			* (which builds Javascript strings) and qsprintf() (which builds MySQL
			* strings).
			*/
			function xsprintf($callback, $userdata, $argv) {
			$argc = count($argv);
			$arg = 0;
			$pos = 0;
			$pattern = $argv[0];
			$len = strlen($pattern);

			$conv = false; // Are we inside a conversion?
			for ($pos = 0; $pos < $len; $pos++) {
			$c = $pattern[$pos];

			if ($conv) {
			// We could make a greater effort to support formatting modifiers,
			// but they really have no place in semantic string formatting.
			if (strpos("'-0123456789.\$+", $c) !== false) {
			throw new Exception(
			"xsprintf() does not support the `%{$c}' modifier.");
			}

			if ($c != '%') {
			$conv = false;

			$arg++;
			if ($arg >= $argc) {
			throw new Exception("Too few arguments to xsprintf().");
			}

			$callback($userdata, $pattern, $pos, $argv[$arg], $len);
			}
			}

			if ($c == '%') {
			// If we have "%%", this encodes a literal percentage symbol, so we are
			// no longer inside a conversion.
			$conv = !$conv;
			}
			}

			if ($arg != ($argc - 1)) {
			throw new Exception("Too many arguments to xsprintf().");
			}

			$argv[0] = $pattern;

			return call_user_func_array('sprintf', $argv);
			}

libphutil/src/xsprintf/xsprintf.php8725b8414f8bproduction

xsprintf.phpView Options

libphutil/src/xsprintf/xsprintf.php
8725b8414f8bproduction

xsprintf.php
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