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ServerMessageProcessor.c
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/*
* The contents of this file are subject to the Mozilla Public License Version
* 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Initial Developer of the Original Code is Devexperts LLC.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
*/
#include "ServerMessageProcessor.h"
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include "BufferedInput.h"
#include "Connection.h"
#include "ConnectionContextData.h"
#include "DXAlgorithms.h"
#include "DXErrorHandling.h"
#include "DXNetwork.h"
#include "DataStructures.h"
#include "Decimal.h"
#include "WideDecimal.h"
#include "EventData.h"
#include "Logger.h"
#include "RecordBuffers.h"
#include "RecordTranscoder.h"
#include "Snapshot.h"
#include "SymbolCodec.h"
/* -------------------------------------------------------------------------- */
/*
* Common data
*/
/* -------------------------------------------------------------------------- */
#define SYMBOL_BUFFER_LEN 2048
#define MIN_FIELD_TYPE_ID 0x00
#define MAX_FIELD_TYPE_ID 0xFF
#define DEFAULT_BUFFER_CAPACITY 16000
#define DESCRIBE_PROTOCOL_TIMEOUT 3000
#define MRU_EVENT_FLAGS 1
#define DX_RECV_PROPERTY_AUTH L"authentication"
#define DX_RECV_PROPERTY_LOGIN_REQUIRED L"LOGIN "
/* -------------------------------------------------------------------------- */
/*
* Client-server data overlapping structures and stuff
*/
/* -------------------------------------------------------------------------- */
typedef struct {
int type;
int local_type; //
dx_record_field_setter_t setter;
dx_record_field_def_val_getter_t def_val_getter;
} dx_field_digest_t, *dx_field_digest_ptr_t;
typedef struct {
dx_field_digest_ptr_t* elements;
int size;
int in_sync_with_server;
} dx_record_digest_t;
typedef struct {
dx_record_digest_t* elements;
size_t size;
size_t capacity;
} dx_record_digest_list_t;
/* -------------------------------------------------------------------------- */
/*
* Message support data
*/
/* -------------------------------------------------------------------------- */
typedef enum {
dx_dps_not_sent,
dx_dps_received,
dx_dps_not_received,
dx_dps_pending
} dx_describe_protocol_status_t;
/* -------------------------------------------------------------------------- */
/*
* Server message processor connection context
*/
/* -------------------------------------------------------------------------- */
typedef struct {
dxf_connection_t connection;
dxf_byte_t* buffer;
dxf_int_t buffer_size;
dxf_int_t buffer_pos;
dxf_int_t buffer_capacity;
dxf_char_t symbol_buffer[SYMBOL_BUFFER_LEN + 1];
dxf_string_t symbol_result;
dxf_string_t last_symbol;
dxf_int_t last_cipher;
dxf_event_flags_t last_flags;
dxf_event_flags_t mru_event_flags;
dx_record_server_support_state_list_t* record_server_support_states;
dx_record_digest_list_t record_digests;
dx_mutex_t record_digests_guard;
void* bicc; /* buffered input connection context */
void* rbcc; /* record buffers connection context */
void* dscc; /* data structures connection context */
int send_msgs_bitmask; /* the bitmask of server supported message types that _our_application_ sends */
int recv_msgs_bitmask; /* the bitmask of server supported message types that _our_application_ receives */
dx_describe_protocol_status_t describe_protocol_status;
int describe_protocol_timestamp;
dx_mutex_t describe_protocol_guard;
char* raw_dump_file_name;
/* Contains received properties from server */
dx_property_map_t recv_props;
} dx_server_msg_proc_connection_context_t;
/* -------------------------------------------------------------------------- */
void dx_init_record_digests_list(dx_record_digest_list_t* record_digests) {
if (record_digests == NULL)
return;
record_digests->elements = NULL;
record_digests->size = 0;
record_digests->capacity = 0;
}
DX_CONNECTION_SUBSYS_INIT_PROTO(dx_ccs_server_msg_processor) {
dx_server_msg_proc_connection_context_t* context = NULL;
CHECKED_CALL_2(dx_validate_connection_handle, connection, true);
context = dx_calloc(1, sizeof(dx_server_msg_proc_connection_context_t));
if (context == NULL) {
return false;
}
context->connection = connection;
dx_init_record_digests_list(&(context->record_digests));
if (!dx_mutex_create(&context->record_digests_guard)) {
dx_free(context);
return false;
}
if ((context->bicc = dx_get_buffered_input_connection_context(connection)) == NULL ||
(context->rbcc = dx_get_record_buffers_connection_context(connection)) == NULL ||
(context->dscc = dx_get_data_structures_connection_context(connection)) == NULL ||
(context->record_server_support_states = dx_get_record_server_support_states(context->dscc)) == NULL) {
dx_free(context);
return dx_set_error_code(dx_cec_connection_context_not_initialized);
}
context->buffer = dx_malloc(DEFAULT_BUFFER_CAPACITY);
if (context->buffer == NULL) {
dx_free(context);
return false;
}
context->buffer_capacity = DEFAULT_BUFFER_CAPACITY;
context->describe_protocol_status = dx_dps_not_sent;
if (!dx_mutex_create(&context->describe_protocol_guard)) {
dx_free(context);
return false;
}
if (!dx_set_subsystem_data(connection, dx_ccs_server_msg_processor, context)) {
dx_free(context->buffer);
dx_free(context);
return false;
}
context->mru_event_flags = MRU_EVENT_FLAGS;
context->raw_dump_file_name = NULL;
return true;
}
/* -------------------------------------------------------------------------- */
void dx_clear_record_digests (dx_server_msg_proc_connection_context_t* context);
DX_CONNECTION_SUBSYS_DEINIT_PROTO(dx_ccs_server_msg_processor) {
int res = true;
dx_server_msg_proc_connection_context_t* context = dx_get_subsystem_data(connection, dx_ccs_server_msg_processor, &res);
if (context == NULL) {
return res;
}
CHECKED_FREE(context->buffer);
CHECKED_FREE(context->last_symbol);
CHECKED_FREE(context->raw_dump_file_name);
dx_clear_record_digests(context);
dx_property_map_free_collection(&context->recv_props);
dx_free(context);
return true;
}
/* -------------------------------------------------------------------------- */
DX_CONNECTION_SUBSYS_CHECK_PROTO(dx_ccs_server_msg_processor) {
return true;
}
/* -------------------------------------------------------------------------- */
/*
* Field digest functions
*/
/* -------------------------------------------------------------------------- */
dx_record_digest_t* dx_get_record_digest(dx_server_msg_proc_connection_context_t* context, dx_record_id_t record_id) {
dx_record_digest_list_t* record_digests = NULL;
if (context == NULL)
return NULL;
record_digests = &(context->record_digests);
if (record_digests->elements == NULL || record_id < 0 || record_id >= (dx_record_id_t)record_digests->size)
return NULL;
return &(record_digests->elements[record_id]);
}
int dx_create_field_digest (dx_server_msg_proc_connection_context_t* context,
dx_record_id_t record_id, const dx_record_item_t* record_info,
OUT dx_field_digest_ptr_t* field_digest) {
dxf_string_t field_name = NULL;
dxf_int_t field_type;
int field_index = INVALID_INDEX;
dx_record_server_support_state_t* state = NULL;
CHECKED_CALL_2(dx_read_utf_string, context->bicc, &field_name);
CHECKED_CALL_2(dx_read_compact_int, context->bicc, &field_type);
if (field_name == NULL || dx_string_length(field_name) == 0 ||
field_type < MIN_FIELD_TYPE_ID || field_type > MAX_FIELD_TYPE_ID) {
dx_free(field_name);
return dx_set_error_code(dx_pec_descr_record_field_info_corrupted);
}
if (record_info == NULL) {
/* a special case of a dummy digest */
*field_digest = NULL;
dx_free(field_name);
return true;
}
field_index = dx_find_record_field(record_info, field_name, field_type);
dx_free(field_name);
*field_digest = dx_calloc(1, sizeof(dx_field_digest_t));
if (field_digest == NULL) {
return false;
}
(*field_digest)->type = field_type;
if (field_index != INVALID_INDEX) {
(*field_digest)->setter = record_info->fields[field_index].setter;
if (!dx_get_record_server_support_state_value(context->record_server_support_states, record_id, &state)) {
return false;
}
(*field_digest)->local_type = record_info->fields[field_index].type;
*state |= INDEX_BITMASK(field_index);
}
return true;
}
/* -------------------------------------------------------------------------- */
int dx_digest_unsupported_fields (dx_server_msg_proc_connection_context_t* context,
dx_record_id_t record_id, const dx_record_item_t* record_info) {
dx_record_digest_t* record_digest = NULL;
int field_index = 0;
if (record_id < 0) {
/* a special case of a dummy digest */
return true;
}
record_digest = dx_get_record_digest(context, record_id);
if (record_digest == NULL)
return dx_set_error_code(dx_ec_invalid_func_param_internal);
for (; field_index < record_info->field_count; ++field_index) {
dx_field_digest_ptr_t field_digest = NULL;
dx_record_server_support_state_t* state;
if (!dx_get_record_server_support_state_value(context->record_server_support_states, record_id, &state)) {
return false;
}
if (*state & INDEX_BITMASK(field_index)) {
/* the field is supported by server, skipping */
continue;
}
field_digest = (dx_field_digest_ptr_t)dx_calloc(1, sizeof(dx_field_digest_t));
if (field_digest == NULL) {
return false;
}
field_digest->setter = record_info->fields[field_index].setter;
field_digest->def_val_getter = record_info->fields[field_index].def_val_getter;
record_digest->elements[(record_digest->size)++] = field_digest;
}
return true;
}
/* -------------------------------------------------------------------------- */
void dx_init_record_digest(dx_record_digest_t* digest) {
if (digest == NULL)
return;
digest->elements = NULL;
digest->size = 0;
digest->in_sync_with_server = false;
}
/* -------------------------------------------------------------------------- */
void dx_clear_record_digest (dx_record_digest_t* digest) {
int i = 0;
if (digest == NULL) {
return;
}
for (; i < digest->size; ++i) {
dx_free(digest->elements[i]);
}
CHECKED_FREE(digest->elements);
dx_init_record_digest(digest);
}
/* -------------------------------------------------------------------------- */
void dx_clear_record_digests (dx_server_msg_proc_connection_context_t* context) {
if (!dx_mutex_lock(&(context->record_digests_guard))) {
return;
}
if (context->record_digests.elements == NULL) {
dx_mutex_unlock(&(context->record_digests_guard));
return;
}
dx_record_id_t count = (dx_record_id_t)context->record_digests.size;
for (dx_record_id_t i = 0; i < count; ++i) {
dx_record_digest_t* record_digest = dx_get_record_digest(context, i);
if (record_digest == NULL)
continue;
dx_clear_record_digest(record_digest);
}
dx_free(context->record_digests.elements);
dx_init_record_digests_list(&(context->record_digests));
dx_mutex_unlock(&(context->record_digests_guard));
}
/* -------------------------------------------------------------------------- */
void dx_init_record_digests(dx_server_msg_proc_connection_context_t* context) {
dx_record_id_t i;
dx_record_id_t count = dx_get_records_list_count(context->dscc);
for (i = 0; i < count; i++) {
dx_add_record_digest_to_list(context->connection, i);
}
}
/* -------------------------------------------------------------------------- */
/*
* Server synchronization functions implementation
*/
/* -------------------------------------------------------------------------- */
int dx_clear_server_info (dxf_connection_t connection) {
int res = true;
dx_server_msg_proc_connection_context_t* context = dx_get_subsystem_data(connection, dx_ccs_server_msg_processor, &res);
dx_record_id_t rid;
dx_record_id_t records_count;
if (context == NULL) {
if (res) {
return dx_set_error_code(dx_cec_connection_context_not_initialized);
}
return false;
}
/* stage 1 - resetting all the field flags */
records_count = dx_get_records_list_count(context->dscc);
for (rid = 0; rid < records_count; ++rid) {
dx_record_server_support_state_t* state;
if (!dx_get_record_server_support_state_value(context->record_server_support_states, rid, &state)) {
return false;
}
*state = 0;
}
/* stage 2 - freeing all the memory allocated by previous synchronization */
dx_clear_record_digests(context);
dx_init_record_digests(context);
/* stage 3 - dropping all the info about supported message types */
CHECKED_CALL(dx_mutex_lock, &(context->describe_protocol_guard));
context->send_msgs_bitmask = context->recv_msgs_bitmask = 0;
context->describe_protocol_status = dx_dps_not_sent;
dx_drop_unsubscribe_counter(context->dscc);
CHECKED_CALL(dx_mutex_unlock, &(context->describe_protocol_guard));
return true;
}
/* -------------------------------------------------------------------------- */
/*
* Message support functions
*/
/* -------------------------------------------------------------------------- */
int dx_lock_describe_protocol_processing (dxf_connection_t connection, int lock) {
int res = true;
dx_server_msg_proc_connection_context_t* context = dx_get_subsystem_data(connection, dx_ccs_server_msg_processor, &res);
if (context == NULL) {
if (res) {
return dx_set_error_code(dx_cec_connection_context_not_initialized);
}
return false;
}
if (lock) {
return dx_mutex_lock(&(context->describe_protocol_guard));
} else {
return dx_mutex_unlock(&(context->describe_protocol_guard));
}
}
/* -------------------------------------------------------------------------- */
static int dx_get_msg_support_state (int msg, const int* roster, size_t count, int bitmask) {
size_t idx;
int found = false;
DX_ARRAY_SEARCH(roster, 0, count, msg, DX_NUMERIC_COMPARATOR, false, found, idx);
if (!found) {
return false;
}
if (IS_FLAG_SET(bitmask, INDEX_BITMASK(idx))) {
return true;
}
return false;
}
/* ---------------------------------- */
int dx_is_message_supported_by_server (dxf_connection_t connection, dx_message_type_t msg, int lock_required,
OUT dx_message_support_status_t* status) {
int res = true;
dx_server_msg_proc_connection_context_t* context = dx_get_subsystem_data(connection, dx_ccs_server_msg_processor, &res);
if (context == NULL) {
if (res) {
return dx_set_error_code(dx_cec_connection_context_not_initialized);
}
return false;
}
if (status == NULL || !dx_is_message_type_valid(msg)) {
return dx_set_error_code(dx_ec_invalid_func_param_internal);
}
if (lock_required) {
CHECKED_CALL(dx_mutex_lock, &(context->describe_protocol_guard));
}
switch (context->describe_protocol_status) {
case dx_dps_not_sent:
dx_logging_info(L"reconnection in progress");
*status = dx_mss_reconnection;
break;
case dx_dps_pending:
*status = dx_mss_pending;
break;
case dx_dps_received:
case dx_dps_not_received:
/* those cases are identical in the way that is important here, because they both properly set the message bitmasks */
if (dx_get_msg_support_state(msg, dx_get_send_message_roster(), dx_get_send_message_roster_size(), context->send_msgs_bitmask) ||
dx_get_msg_support_state(msg, dx_get_recv_message_roster(), dx_get_recv_message_roster_size(), context->recv_msgs_bitmask)) {
*status = dx_mss_supported;
} else {
*status = dx_mss_not_supported;
}
}
if (lock_required) {
return dx_mutex_unlock(&context->describe_protocol_guard);
}
return true;
}
/* -------------------------------------------------------------------------- */
int dx_legacy_send_msg_bitmask (OUT int* bitmask) {
static DX_THREAD_LOCAL const int s_legacy_msg_list[] = {
MESSAGE_TICKER_ADD_SUBSCRIPTION,
MESSAGE_TICKER_REMOVE_SUBSCRIPTION,
MESSAGE_STREAM_ADD_SUBSCRIPTION,
MESSAGE_STREAM_REMOVE_SUBSCRIPTION,
MESSAGE_HISTORY_ADD_SUBSCRIPTION,
MESSAGE_HISTORY_REMOVE_SUBSCRIPTION
};
static DX_THREAD_LOCAL const int s_msg_count = sizeof(s_legacy_msg_list) / sizeof(s_legacy_msg_list[0]);
static DX_THREAD_LOCAL int s_msg_bitmask = 0;
if (bitmask == NULL) {
return dx_set_error_code(dx_ec_invalid_func_param_internal);
}
if (s_msg_bitmask == 0) {
const int* msg_roster = dx_get_send_message_roster();
size_t roster_size = dx_get_send_message_roster_size();
int i = 0;
for (; i < s_msg_count; ++i) {
size_t msg_index;
int found = false;
DX_ARRAY_SEARCH(msg_roster, 0, roster_size, s_legacy_msg_list[i], DX_NUMERIC_COMPARATOR, false, found, msg_index);
if (!found) {
/* Nonsense! The legacy messages mustn't be absent in our message rosters */
return dx_set_error_code(dx_ec_internal_assert_violation);
}
s_msg_bitmask |= INDEX_BITMASK(msg_index);
}
}
*bitmask = s_msg_bitmask;
return true;
}
/* -------------------------------------------------------------------------- */
int dx_legacy_recv_msg_bitmask (int* bitmask) {
static DX_THREAD_LOCAL const int s_legacy_msg_list[] = {
MESSAGE_TICKER_DATA,
MESSAGE_STREAM_DATA,
MESSAGE_HISTORY_DATA
};
static DX_THREAD_LOCAL const int s_msg_count = sizeof(s_legacy_msg_list) / sizeof(s_legacy_msg_list[0]);
static DX_THREAD_LOCAL int s_msg_bitmask = 0;
if (bitmask == NULL) {
return dx_set_error_code(dx_ec_invalid_func_param_internal);
}
if (s_msg_bitmask == 0) {
const int* msg_roster = dx_get_recv_message_roster();
size_t roster_size = dx_get_recv_message_roster_size();
int i = 0;
for (; i < s_msg_count; ++i) {
size_t msg_index;
int found = false;
DX_ARRAY_SEARCH(msg_roster, 0, roster_size, s_legacy_msg_list[i], DX_NUMERIC_COMPARATOR, false, found, msg_index);
if (!found) {
/* Nonsense! The legacy messages mustn't be absent in our message rosters */
return dx_set_error_code(dx_ec_internal_assert_violation);
}
s_msg_bitmask |= INDEX_BITMASK(msg_index);
}
}
*bitmask = s_msg_bitmask;
return true;
}
/* -------------------------------------------------------------------------- */
int dx_describe_protocol_timeout_countdown_task (void* data, int command) {
/*
* This is a special worker thread task that processes the describe protocol timeout logic
*/
dx_server_msg_proc_connection_context_t* context = data;
int res = 0;
if (IS_FLAG_SET(command, dx_tc_free_resources)) {
return dx_tes_success;
}
if (!dx_mutex_lock(&(context->describe_protocol_guard))) {
return dx_tes_dont_advance;
}
switch (context->describe_protocol_status) {
case dx_dps_not_sent:
case dx_dps_not_received:
/*
* These cases must never happen.
* The first is obvious. The second must not be met here because this function IS the ONLY place
* where such state may be set, and it would pop itself from the task queue in that case.
*/
dx_logging_info(L"Oops, we are here: %d", context->describe_protocol_status);
dx_set_error_code(dx_ec_internal_assert_violation);
res = dx_tes_dont_advance;
break;
case dx_dps_received:
/*
* The message was received in time. This task is of no more use.
*/
res = dx_tes_pop_me | dx_tes_success;
break;
case dx_dps_pending:
/*
* That's the main case for us. The message hasn't been received yet, and the timeout is ticking.
*/
if (dx_millisecond_timestamp_diff(dx_millisecond_timestamp(), context->describe_protocol_timestamp) < DESCRIBE_PROTOCOL_TIMEOUT) {
/*
* Timeout hasn't run out yet, keeping on waiting
*/
res = dx_tes_dont_advance | dx_tes_success;
break;
}
/*
* The timeout has passed, yet no message had been received. Setting the describe protocol state and message support
* bitmasks accordingly and finishing the job.
*/
res = dx_tes_pop_me | dx_tes_success;
context->describe_protocol_status = dx_dps_not_received;
if (!dx_legacy_send_msg_bitmask(&(context->send_msgs_bitmask)) ||
!dx_legacy_recv_msg_bitmask(&(context->recv_msgs_bitmask))) {
res &= ~dx_tes_success;
}
}
if (!dx_mutex_unlock(&(context->describe_protocol_guard))) {
res &= ~dx_tes_success;
}
return res;
}
/* ---------------------------------- */
int dx_describe_protocol_sent (dxf_connection_t connection) {
int res = true;
dx_server_msg_proc_connection_context_t* context = dx_get_subsystem_data(connection, dx_ccs_server_msg_processor, &res);
if (context == NULL) {
if (res) {
return dx_set_error_code(dx_cec_connection_context_not_initialized);
}
return false;
}
CHECKED_CALL(dx_mutex_lock, &(context->describe_protocol_guard));
res = true;
switch (context->describe_protocol_status) {
case dx_dps_not_received:
case dx_dps_pending:
/*
* These cases must never happen.
* Because these states may be set only after this function was called.
*/
dx_set_error_code(dx_ec_internal_assert_violation);
res = false;
break;
case dx_dps_not_sent:
/*
* that's the most normal case - the message has just been sent for the first time.
* our actions are:
1) to set the describe protocol timestamp;
2) to set the describe protocol status as pending
3) to add a special task to the worker thread queue, that would count down
the describe message response timeout
*/
context->describe_protocol_timestamp = dx_millisecond_timestamp();
context->describe_protocol_status = dx_dps_pending;
res = dx_add_worker_thread_task(connection, dx_describe_protocol_timeout_countdown_task, (void*)context) && res;
break;
case dx_dps_received:
/*
* That's the most unlikely but still a valid case. The describe protocol response was received before we even got
* here to inform that out describe protocol was sent.
* Do nothing and return success.
*/
break;
}
return dx_mutex_unlock(&(context->describe_protocol_guard)) && res;
}
/* -------------------------------------------------------------------------- */
/*
* Server message processor helpers
*/
/* -------------------------------------------------------------------------- */
static int dx_read_message_type (dx_server_msg_proc_connection_context_t* context, OUT dx_message_type_t* value) {
dxf_long_t type;
if (!dx_read_compact_long(context->bicc, &type)) {
if (dx_get_error_code() == dx_bioec_buffer_underflow) {
return dx_set_error_code(dx_pec_message_incomplete);
}
return false;
}
if (!dx_is_message_type_valid((dx_message_type_t)type)) {
return dx_set_error_code(dx_pec_unexpected_message_type);
}
*value = (dx_message_type_t)type;
return true;
}
/* -------------------------------------------------------------------------- */
static int dx_read_message_length_and_set_buffer_limit (dx_server_msg_proc_connection_context_t* context) {
dxf_long_t message_length;
int message_end_offset;
if (!dx_read_compact_long(context->bicc, &message_length)) {
return dx_set_error_code_impl(dx_pec_message_incomplete, false);
}
if (message_length < 0 || message_length > INT_MAX - dx_get_in_buffer_position(context->bicc)) {
return dx_set_error_code(dx_pec_invalid_message_length);
}
message_end_offset = dx_get_in_buffer_position(context->bicc) + (int)message_length;
if (message_end_offset > context->buffer_size) {
return dx_set_error_code_impl(dx_pec_message_incomplete, false);
}
dx_set_in_buffer_limit(context->bicc, message_end_offset); /* setting limit for this message */
return true;
}
/* -------------------------------------------------------------------------- */
static int dx_read_symbol (dx_server_msg_proc_connection_context_t* context) {
dxf_int_t r;
if (context == NULL ) {
return dx_set_error_code(dx_ec_invalid_func_param_internal);
}
if (dx_codec_read_symbol(context->bicc, context->symbol_buffer, SYMBOL_BUFFER_LEN,
&(context->symbol_result), &r, &(context->last_flags),
&(context->mru_event_flags)) == false) {
return false;
}
if ((r & dx_get_codec_valid_cipher()) != 0) {
context->last_cipher = r;
CHECKED_FREE(context->last_symbol);
context->last_symbol = NULL;
} else if (r > 0) {
context->last_cipher = 0;
CHECKED_FREE(context->last_symbol);
context->last_symbol = dx_create_string_src_len(context->symbol_buffer, r);
if (context->last_symbol == NULL) {
return false;
}
} else {
if (context->symbol_result != NULL) {
context->last_symbol = context->symbol_result;
context->symbol_result = NULL;
context->last_cipher = dx_encode_symbol_name(context->last_symbol);
}
if (context->last_cipher == 0 && context->last_symbol == NULL)
return dx_set_error_code(dx_pec_invalid_symbol);
}
return true;
}
/* -------------------------------------------------------------------------- */
#define CHECKED_SET_VALUE(setter, buffer, value) \
if (setter != NULL) { \
setter(buffer, value); \
}
int dx_read_qdtime_on_remove_event(dx_server_msg_proc_connection_context_t* context,
dx_record_id_t record_id, void* row) {
int i;
dxf_int_t high;
dxf_int_t low;
const dx_record_item_t* record_info = dx_get_record_by_id(context->dscc, record_id);
if (record_info == NULL)
return dx_set_error_code(dx_ec_invalid_func_param_internal);
dxf_long_t qdtime_signed;
CHECKED_CALL_2(dx_read_compact_long, context->bicc, &qdtime_signed);
dxf_ulong_t qdtime = (dxf_ulong_t)qdtime_signed;
high = (dxf_int_t)(qdtime >> 32u);
low = (dxf_int_t)(qdtime & 0xFFFFFFFF);
for (i = 0; i < record_info->field_count; ++i) {
dx_field_info_t field = record_info->fields[i];
if (field.time == dx_ft_first_time_int_field) {
CHECKED_SET_VALUE(field.setter, row, &high)
} else if (field.time == dx_ft_second_time_int_field) {
CHECKED_SET_VALUE(field.setter, row, &low)
}
}
return true;
}
int dx_read_records (dx_server_msg_proc_connection_context_t* context,
dx_record_id_t record_id, void* record_buffer) {
int i = 0;
dxf_byte_t read_byte;
dxf_short_t read_short;
dxf_int_t read_int;
dxf_long_t read_long;
dxf_char_t read_utf_char;
(void)read_utf_char;
dxf_double_t read_double;
dxf_string_t read_string;
dxf_byte_array_t read_byte_array;
if (IS_FLAG_SET(context->last_flags, dxf_ef_remove_event)) {
return dx_read_qdtime_on_remove_event(context, record_id, record_buffer);
}
CHECKED_CALL(dx_mutex_lock, &(context->record_digests_guard));
const dx_record_digest_t* record_digest = dx_get_record_digest(context, record_id);
if (record_digest == NULL) {
CHECKED_CALL(dx_mutex_unlock, &(context->record_digests_guard));
return dx_set_error_code(dx_ec_invalid_func_param_internal);
}
for (; i < record_digest->size; ++i) {
int serialization = record_digest->elements[i]->type & dx_fid_mask_serialization;
int representation = record_digest->elements[i]->type & dx_fid_mask_representation;
int local_representation = record_digest->elements[i]->local_type & dx_fid_mask_representation;
switch (serialization) {
case dx_fid_void:
/* 0 here means that we're dealing with the field the server does not support;
using the default value for it */
record_digest->elements[i]->setter(record_buffer, record_digest->elements[i]->def_val_getter());
break;
case dx_fid_byte:
CHECKED_CALL_2(dx_read_byte, context->bicc, &read_byte);
if (representation == dx_fid_flag_decimal) {
CHECKED_CALL_2(dx_decimal_int_to_double, read_byte, &read_double);
CHECKED_SET_VALUE(record_digest->elements[i]->setter, record_buffer, &read_double)
} else if (representation == dx_fid_flag_wide_decimal) {
CHECKED_CALL_2(dx_wide_decimal_long_to_double, read_byte, &read_double);
CHECKED_SET_VALUE(record_digest->elements[i]->setter, record_buffer, &read_double)
} else {
CHECKED_SET_VALUE(record_digest->elements[i]->setter, record_buffer, &read_byte)
}
break;
case dx_fid_utf_char:
/* No special presentation bits are supported for UTF char */
CHECKED_CALL_2(dx_read_utf_char, context->bicc, &read_int);
read_utf_char = read_int;
CHECKED_SET_VALUE(record_digest->elements[i]->setter, record_buffer, &read_utf_char)
break;
case dx_fid_short:
/* No special presentation bits are supported for UTF char */
CHECKED_CALL_2(dx_read_short, context->bicc, &read_short);
if (representation == dx_fid_flag_decimal) {
CHECKED_CALL_2(dx_decimal_int_to_double, read_short, &read_double);
CHECKED_SET_VALUE(record_digest->elements[i]->setter, record_buffer, &read_double)
} else if (representation == dx_fid_flag_wide_decimal) {
CHECKED_CALL_2(dx_wide_decimal_long_to_double, read_short, &read_double);
CHECKED_SET_VALUE(record_digest->elements[i]->setter, record_buffer, &read_double)
} else {
CHECKED_SET_VALUE(record_digest->elements[i]->setter, record_buffer, &read_short)
}
break;
case dx_fid_int:
CHECKED_CALL_2(dx_read_int, context->bicc, &read_int);
if (representation == dx_fid_flag_decimal) {
CHECKED_CALL_2(dx_decimal_int_to_double, read_int, &read_double);
CHECKED_SET_VALUE(record_digest->elements[i]->setter, record_buffer, &read_double)
} else if (representation == dx_fid_flag_wide_decimal) {
CHECKED_CALL_2(dx_wide_decimal_long_to_double, read_int, &read_double);
CHECKED_SET_VALUE(record_digest->elements[i]->setter, record_buffer, &read_double)
} else {
CHECKED_SET_VALUE(record_digest->elements[i]->setter, record_buffer, &read_int)
}
break;
case dx_fid_compact_int: