sortix-mirror/libc/string/strsep.c

39 lines
1.2 KiB
C

/*
* Copyright (c) 2014 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* string/strsep.c
* Extract a token from a string.
*/
#include <string.h>
char* strsep(char** string_ptr, const char* delim)
{
char* token = *string_ptr;
if ( !token )
return NULL;
size_t token_length = strcspn(token, delim);
if ( token[token_length] )
{
token[token_length++] = '\0';
*string_ptr = token + token_length;
}
else
{
*string_ptr = (char*) NULL;
}
return token;
}