char *
tmpnam(char *s) {
static char name_buffer[L_tmpnam] = "/tmp/tmp.";
static unsigned long count = 0;
static char *name = NULL;
if (!name) {
name = name_buffer + strlen(name_buffer);
name = _i_compute((unsigned long)getpid(), 10, name, 5);
*name++ = '.';
*name = '\0';
}
if (++count > TMP_MAX) count = 1; /* wrap-around */
*_i_compute(count, 10, name, 3) = '\0';
if (s) return strcpy(s, name_buffer);
else return name_buffer;
}
char *
_i_compute(unsigned long val, int base, char *s, int nrdigits)
{
int c;
c= val % base ;
val /= base ;
if (val || nrdigits > 1)
s = _i_compute(val, base, s, nrdigits - 1);
*s++ = (c>9 ? c-10+'a' : c+'0');
return s;
}
char *
_i_compute(printval_u_t val, int base, char *s, int nrdigits)
{
int c;
div_u64_rem(val, base, (u32*)&c); // val % base ;
val = div_u64(val, base); // val /= base
if (val || nrdigits > 1)
s = _i_compute(val, base, s, nrdigits - 1);
*s++ = (c>9 ? c-10+'a' : c+'0');
return s;
}
FILE *
tmpfile(void) {
static char name_buffer[L_tmpnam] = "/tmp/tmp." ;
static char *name = NULL;
FILE *file;
if (!name) {
name = name_buffer + strlen(name_buffer);
name = _i_compute(getpid(), 10, name, 5);
*name = '\0';
}
file = fopen(name_buffer,"wb+");
if (!file) return (FILE *)NULL;
(void) remove(name_buffer);
return file;
}