lsquic_di_error.c revision 7d09751d
17d09751dSDmitri Tikhonov/* Copyright (c) 2017 - 2020 LiteSpeed Technologies Inc.  See LICENSE. */
250aadb33SDmitri Tikhonov/*
350aadb33SDmitri Tikhonov * lsquic_di_error.c -- A placeholder when things go wrong
450aadb33SDmitri Tikhonov *
550aadb33SDmitri Tikhonov * This object is used in order to avoid dereferencing NULLs in stream.c
650aadb33SDmitri Tikhonov */
750aadb33SDmitri Tikhonov
850aadb33SDmitri Tikhonov
950aadb33SDmitri Tikhonov#include <assert.h>
1050aadb33SDmitri Tikhonov#include <stddef.h>
1150aadb33SDmitri Tikhonov#include <stdint.h>
12461e84d8SAmol Deshpande#ifdef WIN32
13461e84d8SAmol Deshpande#include <vc_compat.h>
14461e84d8SAmol Deshpande#endif
1550aadb33SDmitri Tikhonov
165392f7a3SLiteSpeed Tech#include "lsquic_types.h"
1750aadb33SDmitri Tikhonov#include "lsquic_data_in_if.h"
1850aadb33SDmitri Tikhonov
1950aadb33SDmitri Tikhonov
20b93f59beSBob Perperstatic const struct data_in *error_data_in_ptr;
2150aadb33SDmitri Tikhonov
2250aadb33SDmitri Tikhonov
23b93f59beSBob Perperstruct data_in *
24b93f59beSBob Perperdata_in_error_new (struct lsquic_conn_public *conn_pub)
25b93f59beSBob Perper{
26b93f59beSBob Perper    return (struct data_in *) error_data_in_ptr;
27b93f59beSBob Perper}
2850aadb33SDmitri Tikhonov
2950aadb33SDmitri Tikhonov
3050aadb33SDmitri Tikhonovstatic void
3150aadb33SDmitri Tikhonoverror_di_destroy (struct data_in *data_in)
3250aadb33SDmitri Tikhonov{
3350aadb33SDmitri Tikhonov}
3450aadb33SDmitri Tikhonov
3550aadb33SDmitri Tikhonov
3650aadb33SDmitri Tikhonovstatic enum ins_frame
3750aadb33SDmitri Tikhonoverror_di_insert_frame (struct data_in *data_in,
3850aadb33SDmitri Tikhonov                        struct stream_frame *new_frame, uint64_t read_offset)
3950aadb33SDmitri Tikhonov{
4050aadb33SDmitri Tikhonov    return INS_FRAME_ERR;
4150aadb33SDmitri Tikhonov}
4250aadb33SDmitri Tikhonov
4350aadb33SDmitri Tikhonov
4450aadb33SDmitri Tikhonovstatic struct data_frame *
4550aadb33SDmitri Tikhonoverror_di_get_frame (struct data_in *data_in, uint64_t read_offset)
4650aadb33SDmitri Tikhonov{
4750aadb33SDmitri Tikhonov    return NULL;
4850aadb33SDmitri Tikhonov}
4950aadb33SDmitri Tikhonov
5050aadb33SDmitri Tikhonov
5150aadb33SDmitri Tikhonovstatic void
5250aadb33SDmitri Tikhonoverror_di_frame_done (struct data_in *data_in, struct data_frame *data_frame)
5350aadb33SDmitri Tikhonov{
5450aadb33SDmitri Tikhonov}
5550aadb33SDmitri Tikhonov
5650aadb33SDmitri Tikhonov
5750aadb33SDmitri Tikhonovstatic int
5850aadb33SDmitri Tikhonoverror_di_empty (struct data_in *data_in)
5950aadb33SDmitri Tikhonov{
6050aadb33SDmitri Tikhonov    return 1;
6150aadb33SDmitri Tikhonov}
6250aadb33SDmitri Tikhonov
6350aadb33SDmitri Tikhonov
6450aadb33SDmitri Tikhonovstruct data_in *
6550aadb33SDmitri Tikhonoverror_di_switch_impl (struct data_in *data_in, uint64_t read_offset)
6650aadb33SDmitri Tikhonov{
6750aadb33SDmitri Tikhonov    assert(0);
6850aadb33SDmitri Tikhonov    return data_in;
6950aadb33SDmitri Tikhonov}
7050aadb33SDmitri Tikhonov
7150aadb33SDmitri Tikhonov
72c51ce338SDmitri Tikhonovstatic size_t
73c51ce338SDmitri Tikhonoverror_di_mem_used (struct data_in *data_in)
74c51ce338SDmitri Tikhonov{
75c51ce338SDmitri Tikhonov    return 0;
76c51ce338SDmitri Tikhonov}
77c51ce338SDmitri Tikhonov
78c51ce338SDmitri Tikhonov
795392f7a3SLiteSpeed Techstatic void
805392f7a3SLiteSpeed Techerror_di_dump_state (struct data_in *data_in)
815392f7a3SLiteSpeed Tech{
825392f7a3SLiteSpeed Tech}
835392f7a3SLiteSpeed Tech
845392f7a3SLiteSpeed Techstatic uint64_t
855392f7a3SLiteSpeed Techerror_di_readable_bytes (struct data_in *data_in, uint64_t read_offset)
865392f7a3SLiteSpeed Tech{
875392f7a3SLiteSpeed Tech    return 0;
885392f7a3SLiteSpeed Tech}
895392f7a3SLiteSpeed Tech
905392f7a3SLiteSpeed Tech
9150aadb33SDmitri Tikhonovstatic const struct data_in_iface di_if_error = {
9250aadb33SDmitri Tikhonov    .di_destroy      = error_di_destroy,
935392f7a3SLiteSpeed Tech    .di_dump_state   = error_di_dump_state,
9450aadb33SDmitri Tikhonov    .di_empty        = error_di_empty,
9550aadb33SDmitri Tikhonov    .di_frame_done   = error_di_frame_done,
9650aadb33SDmitri Tikhonov    .di_get_frame    = error_di_get_frame,
9750aadb33SDmitri Tikhonov    .di_insert_frame = error_di_insert_frame,
98c51ce338SDmitri Tikhonov    .di_mem_used     = error_di_mem_used,
99cca25415SDmitri Tikhonov    .di_own_on_ok    = 0,   /* Never returns INS_FRAME_OK, but anyway */
1005392f7a3SLiteSpeed Tech    .di_readable_bytes
1015392f7a3SLiteSpeed Tech                     = error_di_readable_bytes,
10250aadb33SDmitri Tikhonov    .di_switch_impl  = error_di_switch_impl,
10350aadb33SDmitri Tikhonov};
104b93f59beSBob Perper
105b93f59beSBob Perper
106461e84d8SAmol Deshpandestatic const struct data_in error_data_in = {
107461e84d8SAmol Deshpande    .di_if    = &di_if_error,
108461e84d8SAmol Deshpande    .di_flags = 0,
109461e84d8SAmol Deshpande};
110b93f59beSBob Perper
111b93f59beSBob Perper
112b93f59beSBob Perperstatic const struct data_in *error_data_in_ptr = &error_data_in;
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