bool ebml_write_header(struct ebml_writer *writer, const_bstring format_name)
{
if (!ebml_start_tag(writer, EBML_HEADER_TAG))
return false;
bstring name_buf = bfromcstralloc(128, "");
if (!name_buf)
return false;
bool ok = true;
if (binsertch(name_buf, 0, 32, '\0') != BSTR_OK) {
fprintf(stderr, "bpattern()\n");
ok = false;
goto out;
}
if (bsetstr(name_buf, 0, format_name, '\0') != BSTR_OK) {
fprintf(stderr, "bsetstr()\n");
ok = false;
goto out;
}
if (!fwrite(name_buf->data, name_buf->slen + 1, 1, writer->f)) {
perror("fwrite");
ok = false;
goto out;
}
ebml_end_tag(writer);
out:
bdestroy(name_buf);
return ok;
}
/* int bFill (bstring a, char c, int len)
*
* Fill a given bstring with the character in parameter c, for a length n.
*/
int bFill (bstring b, char c, int len) {
if (b == NULL || len < 0 || (b->mlen < b->slen && b->mlen > 0)) return -__LINE__;
b->slen = 0;
return bsetstr (b, len, NULL, c);
}
