/****************************************************************************
 * include/string.h
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

#ifndef __INCLUDE_STRING_H
#define __INCLUDE_STRING_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>
#include <nuttx/compiler.h>

#include <stddef.h>
#include <alloca.h>

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

#define strcoll_l(s1, s2, l)    strcoll(s1, s2)
#define strdupa(x)              strcpy(alloca(strlen(x) + 1), x)
#define strerror_l(e, l)        strerror(e)
#define strxfrm_l(s1, s2, n, l) strxfrm(s1, s2, n)

#define strndupa(x, l) ({ \
  FAR const char *__old = (x); \
  size_t __len = strnlen(__old, (l)); \
  FAR char *__new = alloca(__len + 1); \
  __new[__len] = '\0'; \
  (FAR char *)memcpy(__new, __old, __len); \
})

/****************************************************************************
 * Public Function Prototypes
 ****************************************************************************/

#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif

FAR char  *strdup(FAR const char *s) malloc_like;
FAR char  *strndup(FAR const char *s, size_t size) malloc_like;
FAR char  *strerror(int);
int        strerror_r(int, FAR char *, size_t);
size_t     strlen(FAR const char *);
size_t     strnlen(FAR const char *, size_t);
FAR char  *strcat(FAR char *, FAR const char *);
size_t     strlcat(FAR char *, FAR const char *, size_t);
FAR char  *strncat(FAR char *, FAR const char *, size_t);
int        strcmp(FAR const char *, FAR const char *);
int        strncmp(FAR const char *, FAR const char *, size_t);
int        strcoll(FAR const char *, FAR const char *s2);
FAR char  *strcpy(FAR char *dest, FAR const char *src);
FAR char  *stpcpy(FAR char *dest, FAR const char *src);
size_t     strlcpy(FAR char *dst, FAR const char *src, size_t siz);
FAR char  *strncpy(FAR char *, FAR const char *, size_t);
FAR char  *stpncpy(FAR char *, FAR const char *, size_t);
FAR char  *strpbrk(FAR const char *, FAR const char *);
FAR char  *strchr(FAR const char *s, int c);
FAR char  *strchrnul(FAR const char *s, int c);
FAR char  *strrchr(FAR const char *s, int c);
size_t     strspn(FAR const char *, FAR const char *);
size_t     strcspn(FAR const char *, FAR const char *);
FAR char  *strstr(FAR const char *, FAR const char *);
FAR char  *strcasestr(FAR const char *, FAR const char *);
FAR char  *strsep(FAR char **, FAR const char *);
FAR char  *strsignal(int signum);
FAR char  *strtok(FAR char *, FAR const char *);
FAR char  *strtok_r(FAR char *, FAR const char *, FAR char **);
size_t     strxfrm(FAR char *, FAR const char *, size_t n);
int        strverscmp(FAR const char *s1, FAR const char *s2);

FAR void  *memchr(FAR const void *s, int c, size_t n);
FAR void  *memrchr(FAR const void *s, int c, size_t n);
FAR void  *memccpy(FAR void *s1, FAR const void *s2, int c, size_t n);
int        memcmp(FAR const void *s1, FAR const void *s2, size_t n);
FAR void  *memcpy(FAR void *dest, FAR const void *src, size_t n);
FAR void  *memmove(FAR void *dest, FAR const void *src, size_t count);
FAR void  *memset(FAR void *s, int c, size_t n);
FAR void  *memmem(FAR const void *haystack, size_t haystacklen,
                  FAR const void *needle, size_t needlelen);

void explicit_bzero(FAR void *s, size_t n);
int timingsafe_bcmp(FAR const void *b1, FAR const void *b2, size_t n);

#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_STRING_H */