diff options
Diffstat (limited to 'include/cru/common/StringUtil.hpp')
| -rw-r--r-- | include/cru/common/StringUtil.hpp | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/cru/common/StringUtil.hpp b/include/cru/common/StringUtil.hpp index 5dacfa12..62999d53 100644 --- a/include/cru/common/StringUtil.hpp +++ b/include/cru/common/StringUtil.hpp @@ -1,6 +1,10 @@ #pragma once #include "Base.hpp" +#include <functional> +#include <string> +#include <string_view> + namespace cru { using CodePoint = std::int32_t; constexpr CodePoint k_invalid_code_point = -1; @@ -124,4 +128,21 @@ void Utf16EncodeCodePointAppend(CodePoint code_point, std::u16string& str); std::string ToUtf8(std::u16string_view s); std::u16string ToUtf16(std::string_view s); + +// If given s is not a valid utf16 string, return value is UD. +bool Utf16IsValidInsertPosition(std::u16string_view s, gsl::index position); + +// Return position after the character making predicate returns true or 0 if no +// character doing so. +gsl::index Utf16BackwardUntil(std::u16string_view str, gsl::index position, + const std::function<bool(CodePoint)>& predicate); +// Return position before the character making predicate returns true or +// str.size() if no character doing so. +gsl::index Utf16ForwardUntil(std::u16string_view str, gsl::index position, + const std::function<bool(CodePoint)>& predicate); + +gsl::index Utf16PreviousWord(std::u16string_view str, gsl::index position, + bool* is_space = nullptr); +gsl::index Utf16NextWord(std::u16string_view str, gsl::index position, + bool* is_space = nullptr); } // namespace cru |