string_util: Implement buffer to UTF-16 string helper function

Needed as most all software keyboard functions use fixed-length UTF16 string buffers.
This commit is contained in:
Zach Hilman 2018-11-09 17:03:54 -05:00
parent 7901de2b75
commit c70529c1ec
2 changed files with 17 additions and 0 deletions

View file

@ -214,6 +214,15 @@ std::string StringFromFixedZeroTerminatedBuffer(const char* buffer, std::size_t
return std::string(buffer, len); return std::string(buffer, len);
} }
std::u16string UTF16StringFromFixedZeroTerminatedBuffer(const char16_t* buffer,
std::size_t max_len) {
std::size_t len = 0;
while (len < max_len && buffer[len] != '\0')
++len;
return std::u16string(buffer, len);
}
const char* TrimSourcePath(const char* path, const char* root) { const char* TrimSourcePath(const char* path, const char* root) {
const char* p = path; const char* p = path;

View file

@ -66,6 +66,14 @@ bool ComparePartialString(InIt begin, InIt end, const char* other) {
*/ */
std::string StringFromFixedZeroTerminatedBuffer(const char* buffer, std::size_t max_len); std::string StringFromFixedZeroTerminatedBuffer(const char* buffer, std::size_t max_len);
/**
* Creates a UTF-16 std::u16string from a fixed-size NUL-terminated char buffer. If the buffer isn't
* NUL-terminated, then the string ends at the greatest multiple of two less then or equal to
* max_len_bytes.
*/
std::u16string UTF16StringFromFixedZeroTerminatedBuffer(const char16_t* buffer,
std::size_t max_len);
/** /**
* Attempts to trim an arbitrary prefix from `path`, leaving only the part starting at `root`. It's * Attempts to trim an arbitrary prefix from `path`, leaving only the part starting at `root`. It's
* intended to be used to strip a system-specific build directory from the `__FILE__` macro, * intended to be used to strip a system-specific build directory from the `__FILE__` macro,