pmt: initial 3.0.2 update

include/libgnulib/amemxfrm.h

@@ -0,0 +1,49 @@
+/* Locale dependent memory area transformation for comparison.
+   Copyright (C) 2009-2024 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 AMEMXFRM_H
+#define AMEMXFRM_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Generalization of strxfrm() to strings with embedded NUL bytes.  */
+
+/* Transform the memory area [S..S+N-1] to a memory area, in such a way that
+   comparing (S1,N1) and (S2,N2) with memcoll() is equivalent to comparing
+   amemxfrm(S1,N1) and amemxfrm(S2,N2) with memcmp2().
+   The byte S[N] may be temporarily overwritten by this function, but will be
+   restored before this function returns.
+   The result of this function depends on the LC_COLLATE category of the
+   current locale.
+   If successful: If resultbuf is not NULL and the result fits into *lengthp
+   bytes, it is put in resultbuf, and resultbuf is returned.  Otherwise, a
+   freshly allocated string is returned.  In both cases, *lengthp is set to the
+   length of the returned string.
+   Upon failure, return NULL, with errno set.  */
+extern char * amemxfrm (char *restrict s, size_t n,
+                        char *restrict resultbuf, size_t *lengthp);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* AMEMXFRM_H */