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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <CoreFoundation/CoreFoundation.h>
#include <ostream>
#include <string>
#include <string_view>
#include "base/apple/scoped_cftyperef.h"
#include "base/check.h"
#include "base/numerics/safe_conversions.h"
#include "base/strings/sys_string_conversions.h"
#include "net/base/net_string_util.h"
namespace net {
namespace {
bool CharsetToCFStringEncoding(const char* charset,
CFStringEncoding* encoding) {
if (charset == kCharsetLatin1 || strcmp(charset, kCharsetLatin1) == 0) {
*encoding = kCFStringEncodingISOLatin1;
return true;
}
// TODO(mattm): handle other charsets? See
// https://developer.apple.com/reference/corefoundation/cfstringbuiltinencodings?language=objc
// for list of standard CFStringEncodings.
return false;
}
} // namespace
// This constant cannot be defined as const char[] because it is initialized
// by base::kCodepageLatin1 (which is const char[]) in net_string_util_icu.cc.
const char* const kCharsetLatin1 = "ISO-8859-1";
bool ConvertToUtf8(std::string_view text,
const char* charset,
std::string* output) {
CFStringEncoding encoding;
if (!CharsetToCFStringEncoding(charset, &encoding))
return false;
base::apple::ScopedCFTypeRef<CFStringRef> cfstring(CFStringCreateWithBytes(
kCFAllocatorDefault, reinterpret_cast<const UInt8*>(text.data()),
base::checked_cast<CFIndex>(text.length()), encoding,
/*isExternalRepresentation=*/false));
if (!cfstring) {
return false;
}
*output = base::SysCFStringRefToUTF8(cfstring.get());
return true;
}
bool ConvertToUtf8AndNormalize(std::string_view text,
const char* charset,
std::string* output) {
DCHECK(false) << "Not implemented yet.";
return false;
}
bool ConvertToUTF16(std::string_view text,
const char* charset,
std::u16string* output) {
DCHECK(false) << "Not implemented yet.";
return false;
}
bool ConvertToUTF16WithSubstitutions(std::string_view text,
const char* charset,
std::u16string* output) {
DCHECK(false) << "Not implemented yet.";
return false;
}
bool ToUpper(std::u16string_view str, std::u16string* output) {
base::apple::ScopedCFTypeRef<CFStringRef> cfstring =
base::SysUTF16ToCFStringRef(str);
base::apple::ScopedCFTypeRef<CFMutableStringRef> mutable_cfstring(
CFStringCreateMutableCopy(kCFAllocatorDefault, /*maxLength=*/0,
cfstring.get()));
CFStringUppercase(mutable_cfstring.get(), /*locale=*/nullptr);
*output = base::SysCFStringRefToUTF16(mutable_cfstring.get());
return true;
}
} // namespace net
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