1 files changed, 63 insertions, 0 deletions
diff --git a/lib/mbsalign.h b/lib/mbsalign.h
new file mode 100644
index 0000000..37a9af5
--- /dev/null
+++ b/lib/mbsalign.h
@@ -0,0 +1,63 @@
+/* Align/Truncate a string in a given screen width
+   Copyright (C) 2009-2023 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stddef.h>
+#include <stdlib.h>
+
+typedef enum { MBS_ALIGN_LEFT, MBS_ALIGN_RIGHT, MBS_ALIGN_CENTER } mbs_align_t;
+
+enum {
+  /* Use unibyte mode for invalid multibyte strings
+     or when heap memory is exhausted.  */
+  MBA_UNIBYTE_FALLBACK = 0x0001,
+
+  /* As an optimization, don't do multibyte processing
+     when we know no multibyte characters are present.  */
+  MBA_UNIBYTE_ONLY = 0x0002,
+
+  /* Don't add leading padding.  */
+  MBA_NO_LEFT_PAD = 0x0004,
+
+  /* Don't add trailing padding.  */
+  MBA_NO_RIGHT_PAD = 0x0008
+
+#if 0 /* Other possible options.  */
+  /* Skip invalid multibyte chars rather than failing.  */
+  MBA_IGNORE_INVALID
+
+  /* Align multibyte strings using "figure space" (\u2007).  */
+  MBA_USE_FIGURE_SPACE
+
+  /* Don't truncate.  */
+  MBA_NO_TRUNCATE
+
+  /* Ensure no leading whitespace.  */
+  MBA_LSTRIP
+
+  /* Ensure no trailing whitespace.  */
+  MBA_RSTRIP
+#endif
+};
+
+size_t
+mbsalign (char const *src, char *dest, size_t dest_size,
+          size_t *width, mbs_align_t align, int flags)
+  _GL_ATTRIBUTE_NONNULL ();
+
+char *
+ambsalign (char const *src, size_t *width, mbs_align_t align, int flags)
+  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+  _GL_ATTRIBUTE_NONNULL ();