--- Libc/Libc-1725.40.4/include/string.h
+++ Libc/Libc-1082.20.4/include/string.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2007, 2010, 2023 Apple Inc. All rights reserved.
+ * Copyright (c) 2000, 2007, 2010 Apple Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  *
@@ -55,8 +55,143 @@
  *	@(#)string.h	8.1 (Berkeley) 6/2/93
  */
 
-#include <_string.h>
+#ifndef _STRING_H_
+#define	_STRING_H_
+
+#include <_types.h>
+#include <sys/cdefs.h>
+#include <Availability.h>
+#include <sys/_types/_size_t.h>
+#include <sys/_types/_null.h>
+
+/* ANSI-C */
+
+__BEGIN_DECLS
+void	*memchr(const void *, int, size_t);
+int	 memcmp(const void *, const void *, size_t);
+void	*memcpy(void *, const void *, size_t);
+void	*memmove(void *, const void *, size_t);
+void	*memset(void *, int, size_t);
+char	*strcat(char *, const char *);
+char	*strchr(const char *, int);
+int	 strcmp(const char *, const char *);
+int	 strcoll(const char *, const char *);
+char	*strcpy(char *, const char *);
+size_t	 strcspn(const char *, const char *);
+//Begin-Libc
+#ifndef LIBC_ALIAS_STRERROR
+//End-Libc
+char	*strerror(int) __DARWIN_ALIAS(strerror);
+//Begin-Libc
+#else /* LIBC_ALIAS_STRERROR */
+char	*strerror(int) LIBC_ALIAS(strerror);
+#endif /* !LIBC_ALIAS_STRERROR */
+//End-Libc
+size_t	 strlen(const char *);
+char	*strncat(char *, const char *, size_t);
+int	 strncmp(const char *, const char *, size_t);
+char	*strncpy(char *, const char *, size_t);
+char	*strpbrk(const char *, const char *);
+char	*strrchr(const char *, int);
+size_t	 strspn(const char *, const char *);
+char	*strstr(const char *, const char *);
+char	*strtok(char *, const char *);
+size_t	 strxfrm(char *, const char *, size_t);
+__END_DECLS
+
+
+
+/* Additional functionality provided by:
+ * POSIX.1c-1995,
+ * POSIX.1i-1995,
+ * and the omnibus ISO/IEC 9945-1: 1996
+ */
+
+#if __DARWIN_C_LEVEL >= 199506L
+__BEGIN_DECLS
+char	*strtok_r(char *, const char *, char **);
+__END_DECLS
+#endif /* __DARWIN_C_LEVEL >= 199506L */
+
+
+
+/* Additional functionality provided by:
+ * POSIX.1-2001
+ */
+
+#if __DARWIN_C_LEVEL >= 200112L
+__BEGIN_DECLS
+int	 strerror_r(int, char *, size_t);
+char	*strdup(const char *);
+void	*memccpy(void *, const void *, int, size_t);
+__END_DECLS
+#endif /* __DARWIN_C_LEVEL >= 200112L */
+
+
+
+/* Additional functionality provided by:
+ * POSIX.1-2008
+ */
+
+#if __DARWIN_C_LEVEL >= 200809L
+__BEGIN_DECLS
+char	*stpcpy(char *, const char *);
+char    *stpncpy(char *, const char *, size_t) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
+char	*strndup(const char *, size_t) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
+size_t   strnlen(const char *, size_t) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
+char	*strsignal(int sig);
+__END_DECLS
+#endif /* __DARWIN_C_LEVEL >= 200809L */
+
+/* C11 Annex K */
+
+#if defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1
+#include <sys/_types/_rsize_t.h>
+#include <sys/_types/_errno_t.h>
+
+__BEGIN_DECLS
+errno_t	memset_s(void *, rsize_t, int, rsize_t) __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_7_0);
+__END_DECLS
+#endif
+
+/* Darwin extensions */
+
+#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
+#include <sys/_types/_ssize_t.h>
+
+__BEGIN_DECLS
+void	*memmem(const void *, size_t, const void *, size_t) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
+void     memset_pattern4(void *, const void *, size_t) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_3_0);
+void     memset_pattern8(void *, const void *, size_t) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_3_0);
+void     memset_pattern16(void *, const void *, size_t) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_3_0);
+
+char	*strcasestr(const char *, const char *);
+char	*strnstr(const char *, const char *, size_t);
+size_t	 strlcat(char *, const char *, size_t);
+size_t	 strlcpy(char *, const char *, size_t);
+void	 strmode(int, char *);
+char	*strsep(char **, const char *);
+
+/* SUS places swab() in unistd.h.  It is listed here for source compatibility */
+void	 swab(const void * __restrict, void * __restrict, ssize_t);
+__END_DECLS
+
+/* Some functions historically defined in string.h were placed in strings.h
+ * by SUS.  We are using "strings.h" instead of <strings.h> to avoid an issue
+ * where /Developer/Headers/FlatCarbon/Strings.h could be included instead on
+ * case-insensitive file systems.
+ */
+#include "strings.h"
+#endif /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
+
 
 #ifdef _USE_EXTENDED_LOCALES_
 #include <xlocale/_string.h>
 #endif /* _USE_EXTENDED_LOCALES_ */
+
+#if defined (__GNUC__) && _FORTIFY_SOURCE > 0 && !defined (__cplusplus)
+/* Security checking functions.  */
+#include <secure/_string.h>
+#endif
+
+#endif /* _STRING_H_ */