void
ds_put_format_valist(struct ds *ds, const char *format, va_list args_)
{
va_list args;
size_t available;
int needed;
va_copy(args, args_);
available = ds->string ? ds->allocated - ds->length + 1 : 0;
needed = vsnprintf(&ds->string[ds->length], available, format, args);
va_end(args);
if (needed < available) {
ds->length += needed;
} else {
size_t available;
ds_reserve(ds, ds->length + needed);
va_copy(args, args_);
available = ds->allocated - ds->length + 1;
needed = vsnprintf(&ds->string[ds->length], available, format, args);
va_end(args);
assert(needed < available);
ds->length += needed;
}
}
char *
ds_put_uninit(struct ds *ds, size_t n)
{
ds_reserve(ds, ds->length + n);
ds->length += n;
ds->string[ds->length] = '\0';
return &ds->string[ds->length - n];
}
void
print_ipv6_addr(struct ds *string, const struct in6_addr *addr)
{
char *dst;
ds_reserve(string, string->length + INET6_ADDRSTRLEN);
dst = string->string + string->length;
format_ipv6_addr(dst, addr);
string->length += strlen(dst);
}
void
ds_put_printable(struct ds *ds, const char *s, size_t n)
{
ds_reserve(ds, ds->length + n);
while (n-- > 0) {
unsigned char c = *s++;
if (c < 0x20 || c > 0x7e || c == '\\' || c == '"') {
ds_put_format(ds, "\\%03o", (int) c);
} else {
ds_put_char(ds, c);
}
}
}