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//===-- Implementation of wcslcat -----------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/wchar/wcslcat.h"
#include "hdr/types/size_t.h"
#include "hdr/types/wchar_t.h"
#include "src/__support/common.h"
#include "src/__support/macros/config.h"
#include "src/string/string_utils.h"
namespace LIBC_NAMESPACE_DECL {
LLVM_LIBC_FUNCTION(size_t, wcslcat,
(wchar_t *__restrict dst, const wchar_t *__restrict src,
size_t dstsize)) {
const size_t dstlen = internal::string_length(dst);
const size_t srclen = internal::string_length(src);
int limit = static_cast<int>(dstsize - dstlen - 1);
size_t returnval = (dstsize < dstlen ? dstsize : dstlen) + srclen;
if (limit < 0)
return returnval;
int i = 0;
for (; i < limit && src[i] != L'\0'; ++i) {
dst[dstlen + i] = src[i];
}
// appending null terminator if there is room
if (dstlen + i < dstlen + dstsize)
dst[dstlen + i] = L'\0';
return returnval;
}
} // namespace LIBC_NAMESPACE_DECL
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