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-rw-r--r--include/ac/string.h118
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diff --git a/include/ac/string.h b/include/ac/string.h
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+++ b/include/ac/string.h
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+/* Generic string.h */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#ifndef _AC_STRING_H
+#define _AC_STRING_H
+
+#ifdef STDC_HEADERS
+# include <string.h>
+
+#else
+# ifdef HAVE_STRING_H
+# include <string.h>
+# endif
+# if defined(HAVE_STRINGS_H) && (!defined(HAVE_STRING_H) || defined(BOTH_STRINGS_H))
+# include <strings.h>
+# endif
+
+# ifdef HAVE_MEMORY_H
+# include <memory.h>
+# endif
+
+# ifndef HAVE_STRRCHR
+# undef strchr
+# define strchr index
+# undef strrchr
+# define strrchr rindex
+# endif
+
+# ifndef HAVE_MEMCPY
+# undef memcpy
+# define memcpy(d, s, n) ((void) bcopy ((s), (d), (n)))
+# undef memmove
+# define memmove(d, s, n) ((void) bcopy ((s), (d), (n)))
+# endif
+#endif
+
+/* use ldap_pvt_strtok instead of strtok or strtok_r! */
+LDAP_F(char *) ldap_pvt_strtok LDAP_P(( char *str,
+ const char *delim, char **pos ));
+
+#ifndef HAVE_STRDUP
+ /* strdup() is missing, declare our own version */
+# undef strdup
+# define strdup(s) ber_strdup(s)
+#elif !defined(_WIN32)
+ /* some systems fail to declare strdup */
+ /* Windows does not require this declaration */
+ LDAP_LIBC_F(char *) (strdup)();
+#endif
+
+/*
+ * some systems fail to declare strcasecmp() and strncasecmp()
+ * we need them declared so we can obtain pointers to them
+ */
+
+/* we don't want these declared for Windows or Mingw */
+#ifndef _WIN32
+int (strcasecmp)();
+int (strncasecmp)();
+#endif
+
+#ifndef SAFEMEMCPY
+# if defined( HAVE_MEMMOVE )
+# define SAFEMEMCPY( d, s, n ) memmove((d), (s), (n))
+# elif defined( HAVE_BCOPY )
+# define SAFEMEMCPY( d, s, n ) bcopy((s), (d), (n))
+# else
+ /* nothing left but memcpy() */
+# define SAFEMEMCPY( d, s, n ) memcpy((d), (s), (n))
+# endif
+#endif
+
+#define AC_MEMCPY( d, s, n ) (SAFEMEMCPY((d),(s),(n)))
+#define AC_FMEMCPY( d, s, n ) do { \
+ if((n) == 1) *((char*)(d)) = *((char*)(s)); \
+ else AC_MEMCPY( (d), (s), (n) ); \
+ } while(0)
+
+#ifdef NEED_MEMCMP_REPLACEMENT
+ int (lutil_memcmp)(const void *b1, const void *b2, size_t len);
+#define memcmp lutil_memcmp
+#endif
+
+void *(lutil_memrchr)(const void *b, int c, size_t n);
+/* GNU extension (glibc >= 2.1.91), only declared when defined(_GNU_SOURCE) */
+#if defined(HAVE_MEMRCHR) && defined(_GNU_SOURCE)
+#define lutil_memrchr(b, c, n) memrchr(b, c, n)
+#endif /* ! HAVE_MEMRCHR */
+
+#define STRLENOF(s) (sizeof(s)-1)
+
+#if defined( HAVE_NONPOSIX_STRERROR_R )
+# define AC_STRERROR_R(e,b,l) (strerror_r((e), (b), (l)))
+#elif defined( HAVE_STRERROR_R )
+# define AC_STRERROR_R(e,b,l) (strerror_r((e), (b), (l)) == 0 ? (b) : "Unknown error")
+#elif defined( HAVE_SYS_ERRLIST )
+# define AC_STRERROR_R(e,b,l) ((e) > -1 && (e) < sys_nerr \
+ ? sys_errlist[(e)] : "Unknown error" )
+#elif defined( HAVE_STRERROR )
+# define AC_STRERROR_R(e,b,l) (strerror(e)) /* NOTE: may be NULL */
+#else
+# define AC_STRERROR_R(e,b,l) ("Unknown error")
+#endif
+
+#endif /* _AC_STRING_H */