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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_STRINGS_STRING_UTIL_WIN_H_
#define BASE_STRINGS_STRING_UTIL_WIN_H_
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <wchar.h>
#include <string>
#include <string_view>
#include <vector>
#include "base/check.h"
#include "base/compiler_specific.h"
#include "base/containers/span.h"
#include "base/strings/string_util.h"
namespace base {
// Chromium code style is to not use malloc'd strings; this is only for use
// for interaction with APIs that require it.
inline char* strdup(const char* str) {
return _strdup(str);
}
inline int vsnprintf(char* buffer,
size_t size,
const char* format,
va_list arguments) {
int length =
UNSAFE_TODO(vsnprintf_s(buffer, size, size - 1, format, arguments));
if (length < 0) {
return _vscprintf(format, arguments);
}
return length;
}
inline int vswprintf(wchar_t* buffer,
size_t size,
const wchar_t* format,
va_list arguments) {
DCHECK(IsWprintfFormatPortable(format));
int length = _vsnwprintf_s(buffer, size, size - 1, format, arguments);
if (length < 0) {
return _vscwprintf(format, arguments);
}
return length;
}
// Utility functions to access the underlying string buffer as a wide char
// pointer.
//
// Note: These functions violate strict aliasing when char16_t and wchar_t are
// unrelated types. We thus pass -fno-strict-aliasing to the compiler on
// non-Windows platforms [1], and rely on it being off in Clang's CL mode [2].
//
// [1] https://crrev.com/b9a0976622/build/config/compiler/BUILD.gn#244
// [2]
// https://github.com/llvm/llvm-project/blob/1e28a66/clang/lib/Driver/ToolChains/Clang.cpp#L3949
inline wchar_t* as_writable_wcstr(char16_t* str) {
return reinterpret_cast<wchar_t*>(str);
}
inline wchar_t* as_writable_wcstr(std::u16string& str) {
return reinterpret_cast<wchar_t*>(data(str));
}
inline const wchar_t* as_wcstr(const char16_t* str) {
return reinterpret_cast<const wchar_t*>(str);
}
inline const wchar_t* as_wcstr(std::u16string_view str) {
return reinterpret_cast<const wchar_t*>(str.data());
}
// Utility functions to access the underlying string buffer as a char16_t
// pointer.
inline char16_t* as_writable_u16cstr(wchar_t* str) {
return reinterpret_cast<char16_t*>(str);
}
inline char16_t* as_writable_u16cstr(std::wstring& str) {
return reinterpret_cast<char16_t*>(data(str));
}
inline const char16_t* as_u16cstr(const wchar_t* str) {
return reinterpret_cast<const char16_t*>(str);
}
inline const char16_t* as_u16cstr(std::wstring_view str) {
return reinterpret_cast<const char16_t*>(str.data());
}
// Utility functions to convert between std::wstring_view and
// std::u16string_view.
inline std::wstring_view AsWStringView(std::u16string_view str) {
return std::wstring_view(as_wcstr(str.data()), str.size());
}
inline std::u16string_view AsStringPiece16(std::wstring_view str) {
return std::u16string_view(as_u16cstr(str.data()), str.size());
}
inline std::wstring AsWString(std::u16string_view str) {
return std::wstring(as_wcstr(str.data()), str.size());
}
inline std::u16string AsString16(std::wstring_view str) {
return std::u16string(as_u16cstr(str.data()), str.size());
}
// The following section contains overloads of the cross-platform APIs for
// std::wstring and std::wstring_view.
BASE_EXPORT bool IsStringASCII(std::wstring_view str);
BASE_EXPORT std::wstring ToLowerASCII(std::wstring_view str);
BASE_EXPORT std::wstring ToUpperASCII(std::wstring_view str);
BASE_EXPORT int CompareCaseInsensitiveASCII(std::wstring_view a,
std::wstring_view b);
inline bool EqualsCaseInsensitiveASCII(std::wstring_view a,
std::wstring_view b) {
return internal::EqualsCaseInsensitiveASCIIT(a, b);
}
inline bool EqualsCaseInsensitiveASCII(std::wstring_view a,
std::string_view b) {
return internal::EqualsCaseInsensitiveASCIIT(a, b);
}
inline bool EqualsCaseInsensitiveASCII(std::string_view a,
std::wstring_view b) {
return internal::EqualsCaseInsensitiveASCIIT(a, b);
}
BASE_EXPORT bool RemoveChars(std::wstring_view input,
std::wstring_view remove_chars,
std::wstring* output);
BASE_EXPORT bool ReplaceChars(std::wstring_view input,
std::wstring_view replace_chars,
std::wstring_view replace_with,
std::wstring* output);
BASE_EXPORT bool TrimString(std::wstring_view input,
std::wstring_view trim_chars,
std::wstring* output);
BASE_EXPORT std::wstring_view TrimString(std::wstring_view input,
std::wstring_view trim_chars,
TrimPositions positions);
BASE_EXPORT TrimPositions TrimWhitespace(std::wstring_view input,
TrimPositions positions,
std::wstring* output);
BASE_EXPORT std::wstring_view TrimWhitespace(std::wstring_view input,
TrimPositions positions);
BASE_EXPORT std::wstring CollapseWhitespace(
std::wstring_view text,
bool trim_sequences_with_line_breaks);
BASE_EXPORT bool ContainsOnlyChars(std::wstring_view input,
std::wstring_view characters);
BASE_EXPORT bool EqualsASCII(std::u16string_view str, std::string_view ascii);
BASE_EXPORT bool StartsWith(
std::wstring_view str,
std::wstring_view search_for,
CompareCase case_sensitivity = CompareCase::SENSITIVE);
BASE_EXPORT bool EndsWith(
std::wstring_view str,
std::wstring_view search_for,
CompareCase case_sensitivity = CompareCase::SENSITIVE);
BASE_EXPORT void ReplaceFirstSubstringAfterOffset(
std::wstring* str,
size_t start_offset,
std::wstring_view find_this,
std::wstring_view replace_with);
BASE_EXPORT void ReplaceSubstringsAfterOffset(std::wstring* str,
size_t start_offset,
std::wstring_view find_this,
std::wstring_view replace_with);
BASE_EXPORT wchar_t* WriteInto(std::wstring* str, size_t length_with_null);
BASE_EXPORT std::wstring JoinString(span<const std::wstring> parts,
std::wstring_view separator);
BASE_EXPORT std::wstring JoinString(span<const std::wstring_view> parts,
std::wstring_view separator);
BASE_EXPORT std::wstring JoinString(
std::initializer_list<std::wstring_view> parts,
std::wstring_view separator);
BASE_EXPORT std::wstring ReplaceStringPlaceholders(
std::wstring_view format_string,
base::span<const std::wstring> subst,
std::vector<size_t>* offsets);
} // namespace base
#endif // BASE_STRINGS_STRING_UTIL_WIN_H_
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