static NOINLINE size_t peekbytes_slow(upb_pbdecoder *d, void *buf,
size_t bytes) {
size_t ret = curbufleft(d);
memcpy(buf, d->ptr, ret);
if (in_residual_buf(d, d->ptr)) {
size_t copy = UPB_MIN(bytes - ret, d->size_param);
memcpy(buf + ret, d->buf_param, copy);
ret += copy;
}
return ret;
}
void upb_stdio_read(const void *src, uint64_t src_ofs, size_t len, char *dst) {
upb_stdio_buf *buf = upb_stdio_findbuf(src, src_ofs);
src_ofs -= buf->ofs;
memcpy(dst, &buf->data[src_ofs], BUF_SIZE - src_ofs);
len -= (BUF_SIZE - src_ofs);
dst += (BUF_SIZE - src_ofs);
while (len > 0) {
++buf;
size_t bytes = UPB_MIN(len, BUF_SIZE);
memcpy(dst, buf->data, bytes);
len -= bytes;
dst += bytes;
}
}
FORCEINLINE void upb_decode_fixed(upb_decoder *d, char *buf, size_t bytes) {
if (upb_decoder_bufleft(d) >= bytes) {
// Fast case.
memcpy(buf, d->ptr, bytes);
upb_decoder_advance(d, bytes);
} else {
// Slow case.
size_t read = 0;
while (1) {
size_t avail = UPB_MIN(upb_decoder_bufleft(d), bytes - read);
memcpy(buf + read, d->ptr, avail);
upb_decoder_advance(d, avail);
read += avail;
if (read == bytes) break;
upb_pullbuf(d);
}
}
}
