Pull UTF-8 decoding into libmisc/utf8.c

1 files changed, 0 insertions, 36 deletions

diff --git a/lib9p/core_utf8.h b/lib9p/core_utf8.h
deleted file mode 100644
index 2c451e0..0000000
--- a/lib9p/core_utf8.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/* lib9p/core_utf8.h - Internal UTF-8 validation
- *
- * Copyright (C) 2024-2025  Luke T. Shumaker <lukeshu@lukeshu.com>
- * SPDX-License-Identifier: AGPL-3.0-or-later
- */
-
-#ifndef _LIB9P_CORE_UTF8_H_
-#define _LIB9P_CORE_UTF8_H_
-
-#include <stddef.h> /* for size_t */
-#include <stdint.h> /* for uint{n}_t */
-
-static inline bool _is_valid_utf8(uint8_t *str, size_t len, bool forbid_nul) {
-	uint32_t ch;
-	uint8_t chlen;
-	for (size_t pos = 0; pos < len;) {
-		if      ((str[pos] & 0b10000000) == 0b00000000) { ch = str[pos] & 0b01111111; chlen = 1; }
-		else if ((str[pos] & 0b11100000) == 0b11000000) { ch = str[pos] & 0b00011111; chlen = 2; }
-		else if ((str[pos] & 0b11110000) == 0b11100000) { ch = str[pos] & 0b00001111; chlen = 3; }
-		else if ((str[pos] & 0b11111000) == 0b11110000) { ch = str[pos] & 0b00000111; chlen = 4; }
-		else return false;
-		if ((ch == 0 && (chlen != 1 || forbid_nul)) || pos + chlen > len) return false;
-		for (uint8_t i = 1; i < chlen; i++) {
-			if ((str[pos+i] & 0b11000000) != 0b10000000) return false;
-			ch = (ch << 6) | (str[pos+i] & 0b00111111);
-		}
-		if (ch > 0x10FFFF) return false;
-		pos += chlen;
-	}
-	return true;
-}
-
-#define is_valid_utf8(str, len)                 _is_valid_utf8(str, len, false)
-#define is_valid_utf8_without_nul(str, len)     _is_valid_utf8(str, len, true)
-
-#endif /* _LIB9P_CORE_UTF8_H_ */