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Rename _strlen_clipped to strnlen (and use the system equivalent for char * inputs).

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Add `strnlen` for `char16_t *` and `wchar_t *`.
This commit is contained in:
Lukas Tenbrink
2025-03-30 22:33:21 +02:00
parent 1cf573f44d
commit ec32dae1da
2 changed files with 27 additions and 18 deletions
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36
core/string/ustring.h
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@@ -66,41 +66,47 @@ constexpr size_t strlen(const char32_t *p_str) {
}
// strlen equivalent function for wchar_t * arguments; depends on the platform.
constexpr size_t strlen(const wchar_t *str) {
constexpr size_t strlen(const wchar_t *p_str) {
// Use static_cast twice because reinterpret_cast is not allowed in constexpr
#ifdef WINDOWS_ENABLED
// wchar_t is 16-bit
return strlen(static_cast<const char16_t *>(static_cast<const void *>(str)));
return strlen(static_cast<const char16_t *>(static_cast<const void *>(p_str)));
#else
// wchar_t is 32-bit
return strlen(static_cast<const char32_t *>(static_cast<const void *>(str)));
return strlen(static_cast<const char32_t *>(static_cast<const void *>(p_str)));
#endif
}
constexpr size_t _strlen_clipped(const char *p_str, int p_clip_to_len) {
if (p_clip_to_len < 0) {
return strlen(p_str);
}
int len = 0;
// strnlen equivalent function for char16_t * arguments.
constexpr size_t strnlen(const char16_t *p_str, size_t p_clip_to_len) {
size_t len = 0;
while (len < p_clip_to_len && *(p_str++) != 0) {
len++;
}
return len;
}
constexpr size_t _strlen_clipped(const char32_t *p_str, int p_clip_to_len) {
if (p_clip_to_len < 0) {
return strlen(p_str);
}
int len = 0;
// strnlen equivalent function for char32_t * arguments.
constexpr size_t strnlen(const char32_t *p_str, size_t p_clip_to_len) {
size_t len = 0;
while (len < p_clip_to_len && *(p_str++) != 0) {
len++;
}
return len;
}
// strnlen equivalent function for wchar_t * arguments; depends on the platform.
constexpr size_t strnlen(const wchar_t *p_str, size_t p_clip_to_len) {
// Use static_cast twice because reinterpret_cast is not allowed in constexpr
#ifdef WINDOWS_ENABLED
// wchar_t is 16-bit
return strnlen(static_cast<const char16_t *>(static_cast<const void *>(p_str)), p_clip_to_len);
#else
// wchar_t is 32-bit
return strnlen(static_cast<const char32_t *>(static_cast<const void *>(p_str)), p_clip_to_len);
#endif
}
template <typename L, typename R>
constexpr int64_t str_compare(const L *l_ptr, const R *r_ptr) {
while (true) {