/* @deftypefn Supplemental char* strdup (const char *@var{s}) Returns a pointer to a copy of @var{s} in memory obtained from @code{malloc}, or @code{NULL} if insufficient memory was available. @end deftypefn */ #include <ansidecl.h> #ifdef ANSI_PROTOTYPES #include <stddef.h> #else #define size_t unsigned long #endif extern size_t strlen PARAMS ((const char*)); extern PTR malloc PARAMS ((size_t)); extern PTR memcpy PARAMS ((PTR, const PTR, size_t)); char * strdup(s) const char *s; { size_t len = strlen (s) + 1; char *result = (char*) malloc (len); if (result == (char*) 0) return (char*) 0; return (char*) memcpy (result, s, len); }