static void buf_write(char **bufp, int *sizep, int *posp, const char *str)
{
int len = strlen(str);
buf_ensure_space(bufp, sizep, posp, len);
memcpy(*bufp + *posp, str, len);
*posp += len;
}
static void buf_append_OCTET_STRING(struct oc_text_buf *buf, void *data, int len)
{
/* We only (need to) cope with length < 0x80 for now */
if (len >= 0x80) {
buf->error = -EINVAL;
return;
}
if (buf_ensure_space(buf, 2 + len))
return;
buf->data[buf->pos++] = 0x04;
buf->data[buf->pos++] = len;
memcpy(buf->data + buf->pos, data, len);
buf->pos += len;
}
static void buf_append_INTEGER(struct oc_text_buf *buf, uint32_t datum)
{
int l;
/* We only handle positive integers up to INT_MAX */
if (datum < 0x80)
l = 1;
else if (datum < 0x8000)
l = 2;
else if (datum < 0x800000)
l = 3;
else
l = 4;
if (buf_ensure_space(buf, 2 + l))
return;
buf->data[buf->pos++] = 0x02;
buf->data[buf->pos++] = l;
while (l--)
buf->data[buf->pos++] = datum >> (l * 8);
}
static void buf_write_ch(char **bufp, int *sizep, int *posp, char ch)
{
buf_ensure_space(bufp, sizep, posp, 1);
(*bufp)[*posp] = ch;
*posp += 1;
}