Add test for range error in expm1.
[glibc.git] / string / strsep.c
blobe5342f7a224bbe975b62e7b1242a18164f78ae82
1 /* Copyright (C) 1992, 93, 96, 97, 98, 99, 2004 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <string.h>
21 #undef __strsep
22 #undef strsep
24 char *
25 __strsep (char **stringp, const char *delim)
27 char *begin, *end;
29 begin = *stringp;
30 if (begin == NULL)
31 return NULL;
33 /* A frequent case is when the delimiter string contains only one
34 character. Here we don't need to call the expensive `strpbrk'
35 function and instead work using `strchr'. */
36 if (delim[0] == '\0' || delim[1] == '\0')
38 char ch = delim[0];
40 if (ch == '\0')
41 end = NULL;
42 else
44 if (*begin == ch)
45 end = begin;
46 else if (*begin == '\0')
47 end = NULL;
48 else
49 end = strchr (begin + 1, ch);
52 else
53 /* Find the end of the token. */
54 end = strpbrk (begin, delim);
56 if (end)
58 /* Terminate the token and set *STRINGP past NUL character. */
59 *end++ = '\0';
60 *stringp = end;
62 else
63 /* No more delimiters; this is the last token. */
64 *stringp = NULL;
66 return begin;
68 weak_alias (__strsep, strsep)
69 strong_alias (__strsep, __strsep_g)
70 libc_hidden_def (__strsep_g)