/* If there was a network error in the past taking bytes
* out of the buffer, return it to the next call that
* tries to read from an empty buffer.
*/
static int PR_CALLBACK memio_Recv(PRFileDesc *fd, void *buf, PRInt32 len,
PRIntn flags, PRIntervalTime timeout)
{
struct PRFilePrivate *secret;
struct memio_buffer *mb;
int rv;
if (flags) {
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return -1;
}
secret = fd->secret;
mb = &secret->readbuf;
PR_ASSERT(mb->bufsize);
rv = memio_buffer_get(mb, buf, len);
if (rv == 0 && !secret->eof) {
if (mb->last_err)
PR_SetError(mb->last_err, 0);
else
PR_SetError(PR_WOULD_BLOCK_ERROR, 0);
return -1;
}
return rv;
}
int main()
{
struct memio_buffer mb;
char buf[100];
int i;
memio_buffer_new(&mb, TEST_BUFLEN);
CHECKEQ(memio_buffer_unused_contiguous(&mb), TEST_BUFLEN-1);
CHECKEQ(memio_buffer_used_contiguous(&mb), 0);
CHECKEQ(memio_buffer_put(&mb, "howdy", 5), 5);
CHECKEQ(memio_buffer_unused_contiguous(&mb), TEST_BUFLEN-1-5);
CHECKEQ(memio_buffer_used_contiguous(&mb), 5);
CHECKEQ(memio_buffer_wrapped_bytes(&mb), 0);
CHECKEQ(memio_buffer_put(&mb, "!", 1), 1);
CHECKEQ(memio_buffer_unused_contiguous(&mb), 0);
CHECKEQ(memio_buffer_used_contiguous(&mb), 6);
CHECKEQ(memio_buffer_wrapped_bytes(&mb), 0);
CHECKEQ(memio_buffer_get(&mb, buf, 6), 6);
CHECKEQ(memcmp(buf, "howdy!", 6), 0);
CHECKEQ(memio_buffer_unused_contiguous(&mb), 1);
CHECKEQ(memio_buffer_used_contiguous(&mb), 0);
CHECKEQ(memio_buffer_put(&mb, "01234", 5), 5);
CHECKEQ(memio_buffer_used_contiguous(&mb), 1);
CHECKEQ(memio_buffer_wrapped_bytes(&mb), 4);
CHECKEQ(memio_buffer_unused_contiguous(&mb), TEST_BUFLEN-1-5);
CHECKEQ(memio_buffer_put(&mb, "5", 1), 1);
CHECKEQ(memio_buffer_unused_contiguous(&mb), 0);
CHECKEQ(memio_buffer_used_contiguous(&mb), 1);
/* TODO: add more cases */
printf("Test passed\n");
exit(0);
}
/* If there was a network error in the past taking bytes
* out of the buffer, return it to the next call that
* tries to read from an empty buffer.
*/
static int PR_CALLBACK memio_Recv(PRFileDesc *fd, void *buf, PRInt32 len,
PRIntn flags, PRIntervalTime timeout)
{
struct PRFilePrivate *secret;
struct memio_buffer *mb;
int rv;
if (flags) {
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return -1;
}
secret = fd->secret;
mb = &secret->readbuf;
PR_ASSERT(mb->bufsize);
rv = memio_buffer_get(mb, buf, len);
if (rv == 0 && !secret->eof) {
secret->read_requested = len;
/* If there is no more data in the buffer, report any pending errors
* that were previously observed. Note that both the readbuf and the
* writebuf are checked for errors, since the application may have
* encountered a socket error while writing that would otherwise not
* be reported until the application attempted to write again - which
* it may never do.
*/
if (mb->last_err)
PR_SetError(mb->last_err, 0);
else if (secret->writebuf.last_err)
PR_SetError(secret->writebuf.last_err, 0);
else
PR_SetError(PR_WOULD_BLOCK_ERROR, 0);
return -1;
}
secret->read_requested = 0;
return rv;
}