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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// The original source code is from:
// http://src.chromium.org/viewvc/chrome/trunk/src/base/strings/string_util.cc?revision=268754
//
// Modified to contain only the DoReplaceStringPlaceholders() that works with
// std::string. Replaced DCHECK() with assert() and removed offsets.
#include "string_util.h"
#include <libaddressinput/util/basictypes.h>
#include <algorithm>
#include <cassert>
#include <string>
#include <vector>
namespace i18n {
namespace addressinput {
std::string DoReplaceStringPlaceholders(const std::string& format_string,
const std::vector<std::string>& subst) {
size_t substitutions = subst.size();
size_t sub_length = 0;
for (std::vector<std::string>::const_iterator iter = subst.begin();
iter != subst.end(); ++iter) {
sub_length += iter->length();
}
std::string formatted;
formatted.reserve(format_string.length() + sub_length);
for (std::string::const_iterator i = format_string.begin();
i != format_string.end(); ++i) {
if ('$' == *i) {
if (i + 1 != format_string.end()) {
++i;
assert('$' == *i || '1' <= *i);
if ('$' == *i) {
while (i != format_string.end() && '$' == *i) {
formatted.push_back('$');
++i;
}
--i;
} else {
uintptr_t index = 0;
while (i != format_string.end() && '0' <= *i && *i <= '9') {
index *= 10;
index += *i - '0';
++i;
}
--i;
index -= 1;
if (index < substitutions)
formatted.append(subst.at(index));
}
}
} else {
formatted.push_back(*i);
}
}
return formatted;
}
} // addressinput
} // i18n
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