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+/* Display width functions.
+ Copyright (C) 2001-2002, 2005, 2007, 2009-2023 Free Software Foundation,
+ Inc.
+
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ This file is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#ifndef _UNIWIDTH_H
+#define _UNIWIDTH_H
+
+#include "unitypes.h"
+
+/* Get size_t. */
+#include <stddef.h>
+
+/* Get locale_charset() declaration. */
+#include "localcharset.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Display width. */
+
+/* These functions are locale dependent. The encoding argument identifies
+ the encoding (e.g. "ISO-8859-2" for Polish). */
+
+/* Determine number of column positions required for UC. */
+extern int
+ uc_width (ucs4_t uc, const char *encoding)
+ _UC_ATTRIBUTE_PURE;
+
+/* Determine number of column positions required for first N units
+ (or fewer if S ends before this) in S. */
+extern int
+ u8_width (const uint8_t *s, size_t n, const char *encoding)
+ _UC_ATTRIBUTE_PURE;
+extern int
+ u16_width (const uint16_t *s, size_t n, const char *encoding)
+ _UC_ATTRIBUTE_PURE;
+extern int
+ u32_width (const uint32_t *s, size_t n, const char *encoding)
+ _UC_ATTRIBUTE_PURE;
+
+/* Determine number of column positions required for S. */
+extern int
+ u8_strwidth (const uint8_t *s, const char *encoding)
+ _UC_ATTRIBUTE_PURE;
+extern int
+ u16_strwidth (const uint16_t *s, const char *encoding)
+ _UC_ATTRIBUTE_PURE;
+extern int
+ u32_strwidth (const uint32_t *s, const char *encoding)
+ _UC_ATTRIBUTE_PURE;
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _UNIWIDTH_H */