diff options
Diffstat (limited to '')
-rw-r--r-- | src/c-ares/ares_strdup.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/c-ares/ares_strdup.c b/src/c-ares/ares_strdup.c new file mode 100644 index 00000000..0c3dcffc --- /dev/null +++ b/src/c-ares/ares_strdup.c @@ -0,0 +1,49 @@ + + +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +#include "ares_setup.h" +#include "ares_strdup.h" +#include "ares.h" +#include "ares_private.h" + +char *ares_strdup(const char *s1) +{ +#ifdef HAVE_STRDUP + if (ares_malloc == malloc) + return strdup(s1); + else +#endif + { + size_t sz; + char * s2; + + if(s1) { + sz = strlen(s1); + if(sz < (size_t)-1) { + sz++; + if(sz < ((size_t)-1) / sizeof(char)) { + s2 = ares_malloc(sz * sizeof(char)); + if(s2) { + memcpy(s2, s1, sz * sizeof(char)); + return s2; + } + } + } + } + return (char *)NULL; + } +} |