gpre_usn* MSC_username(const SCHAR* name, USHORT name_dyn)
{
gpre_usn* username = (gpre_usn*) MSC_alloc(USN_LEN);
char* newname = (char*) MSC_alloc(static_cast<int>(strlen(name) + 1));
username->usn_name = newname;
strcpy(newname, name);
username->usn_dyn = name_dyn;
username->usn_next = 0;
return username;
}
static void cmp_any( gpre_req* request)
{
// Build the primary send statement
gpre_port* port = request->req_primary;
make_send(port, request);
request->add_byte(blr_if);
request->add_byte(blr_any);
CME_rse(request->req_rse, request);
gpre_nod* value = MSC_unary(nod_value, (gpre_nod*) port->por_references);
// Make a send to signal end of file
request->add_byte(blr_assignment);
CME_expr(lit1, request);
CME_expr(value, request);
request->add_byte(blr_assignment);
CME_expr(lit0, request);
CME_expr(value, request);
port = request->req_vport;
if (port)
{
for (ref* reference = port->por_references; reference; reference = reference->ref_next)
{
ref* source = (ref*) MSC_alloc(REF_LEN);
reference->ref_source = source;
source->ref_ident = CMP_next_ident();
}
}
}
SCHAR* MSC_string(const TEXT* input)
{
TEXT* string = (TEXT*) MSC_alloc(static_cast<int>(strlen(input) + 1));
strcpy(string, input);
return string;
}
gpre_nod* MSC_node(nod_t type, SSHORT count)
{
gpre_nod* node = (gpre_nod*) MSC_alloc(NOD_LEN(count));
node->nod_count = count;
node->nod_type = type;
return node;
}
PRV MSC_privilege_block()
{
PRV privilege_block = (PRV) MSC_alloc(PRV_LEN);
privilege_block->prv_privileges = PRV_no_privs;
privilege_block->prv_username = 0;
privilege_block->prv_relation = 0;
privilege_block->prv_fields = 0;
privilege_block->prv_next = 0;
return privilege_block;
}
ref* MSC_reference(ref** link)
{
ref* reference = (ref*) MSC_alloc(REF_LEN);
if (link)
{
reference->ref_next = *link;
*link = reference;
}
return reference;
}
void MSC_push( gpre_nod* object, gpre_lls** pointer)
{
gpre_lls* stack = free_lls;
if (stack)
free_lls = stack->lls_next;
else
stack = (gpre_lls*) MSC_alloc(LLS_LEN);
stack->lls_object = object;
stack->lls_next = *pointer;
*pointer = stack;
}
gpre_sym* MSC_symbol(sym_t type, const TEXT* string, USHORT length, gpre_ctx* object)
{
gpre_sym* symbol = (gpre_sym*) MSC_alloc(SYM_LEN + length);
symbol->sym_type = type;
symbol->sym_object = object;
TEXT* p = symbol->sym_name;
symbol->sym_string = p;
if (length)
memcpy(p, string, length);
return symbol;
}
act* MSC_action( gpre_req* request, act_t type)
{
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = type;
if (request)
{
action->act_next = request->req_actions;
request->req_actions = action;
action->act_request = request;
}
return action;
}
gpre_ctx* MSC_context(gpre_req* request)
{
// allocate and initialize
gpre_ctx* context = (gpre_ctx*) MSC_alloc(CTX_LEN);
context->ctx_request = request;
context->ctx_internal = request->req_internal++;
context->ctx_scope_level = request->req_scope_level;
// link in with the request block
context->ctx_next = request->req_contexts;
request->req_contexts = context;
return context;
}
gpre_req* MSC_request(req_t type)
{
gpre_req* request = (gpre_req*) MSC_alloc(REQ_LEN);
request->req_type = type;
request->req_next = gpreGlob.requests;
gpreGlob.requests = request;
request->req_routine = (gpre_req*) gpreGlob.cur_routine->act_object;
gpreGlob.cur_routine->act_object = (ref*) request;
if (!(gpreGlob.cur_routine->act_flags & ACT_main))
request->req_flags |= REQ_local;
if (gpreGlob.sw_sql_dialect <= SQL_DIALECT_V5)
request->req_flags |= REQ_blr_version4;
return request;
}
void CMP_check( gpre_req* request, SSHORT min_reqd)
{
const int length = request->req_blr - request->req_base;
if (!min_reqd && (length < request->req_length - 100))
return;
const int n = ((length + min_reqd + 100) > request->req_length * 2) ?
length + min_reqd + 100 : request->req_length * 2;
UCHAR* const old = request->req_base;
UCHAR* p = MSC_alloc(n);
request->req_base = p;
request->req_length = n;
request->req_blr = request->req_base + length;
memcpy(p, old, length);
MSC_free(old);
}
void CMP_t_start( gpre_tra* trans)
{
char rrl_buffer[MAX_TPB];
char tpb_buffer[MAX_TRA_OPTIONS + 1];
// fill out a standard tpb buffer ahead of time so we know
// how large it is
char* text = tpb_buffer;
*text++ = isc_tpb_version1;
*text++ = (trans->tra_flags & TRA_ro) ? isc_tpb_read : isc_tpb_write;
if (trans->tra_flags & TRA_con)
*text++ = isc_tpb_consistency;
else if (trans->tra_flags & TRA_read_committed)
*text++ = isc_tpb_read_committed;
else
*text++ = isc_tpb_concurrency;
*text++ = (trans->tra_flags & TRA_nw) ? isc_tpb_nowait : isc_tpb_wait;
if (trans->tra_flags & TRA_read_committed) {
*text++ = (trans->tra_flags & TRA_rec_version) ? isc_tpb_rec_version : isc_tpb_no_rec_version;
}
if (trans->tra_flags & TRA_autocommit)
*text++ = isc_tpb_autocommit;
if (trans->tra_flags & TRA_no_auto_undo)
*text++ = isc_tpb_no_auto_undo;
*text = 0;
const USHORT tpb_len = text - tpb_buffer;
for (gpre_dbb* database = gpreGlob.isc_databases; database; database = database->dbb_next)
{
// figure out if this is a simple transaction or a reserving
// transaction. Allocate a TPB of the right size in either
// case.
tpb* new_tpb = 0;
if (trans->tra_flags & TRA_inc)
{
if (database->dbb_flags & DBB_in_trans)
{
new_tpb = (tpb*) MSC_alloc(TPB_LEN(tpb_len));
new_tpb->tpb_length = tpb_len;
database->dbb_flags &= ~DBB_in_trans;
}
else
continue;
}
else if (!(trans->tra_flags & TRA_rrl))
{
new_tpb = (tpb*) MSC_alloc(TPB_LEN(tpb_len));
new_tpb->tpb_length = tpb_len;
}
else if (database->dbb_rrls)
{
char* p = rrl_buffer;
for (const rrl* lock_block = database->dbb_rrls; lock_block;
lock_block = lock_block->rrl_next)
{
*p++ = lock_block->rrl_lock_mode;
const char* q = lock_block->rrl_relation->rel_symbol->sym_string;
*p++ = static_cast<char>(strlen(q));
while (*q)
*p++ = *q++;
*p++ = lock_block->rrl_lock_level;
}
*p = 0;
const USHORT buff_len = (p - rrl_buffer);
new_tpb = (tpb*) MSC_alloc(TPB_LEN(buff_len + tpb_len));
new_tpb->tpb_length = buff_len + tpb_len;
database->dbb_rrls = NULL;
}
else // this database isn't referenced
continue;
// link this into the TPB chains (gpre_tra and gpre_dbb)
new_tpb->tpb_database = database;
new_tpb->tpb_dbb_next = database->dbb_tpbs;
database->dbb_tpbs = new_tpb;
new_tpb->tpb_tra_next = trans->tra_tpb;
trans->tra_tpb = new_tpb;
trans->tra_db_count++;
// fill in the standard TPB and concatenate the relation names
new_tpb->tpb_ident = CMP_next_ident();
text = reinterpret_cast<char*>(new_tpb->tpb_string);
for (const char* pb = tpb_buffer; *pb;)
*text++ = *pb++;
if (trans->tra_flags & TRA_rrl)
strcpy(text, rrl_buffer);
}
}
void CMP_compile_request( gpre_req* request)
{
// if there isn't a request handle specified, make one!
if (!request->req_handle && (request->req_type != REQ_procedure))
{
request->req_handle = (TEXT*) MSC_alloc(20);
sprintf(request->req_handle, gpreGlob.ident_pattern, CMP_next_ident());
}
if (!request->req_trans)
request->req_trans = gpreGlob.transaction_name;
if (!request->req_request_level)
request->req_request_level = "0";
request->req_ident = CMP_next_ident();
// If this is an SQL blob cursor, compile the blob and get out fast.
if (request->req_flags & (REQ_sql_blob_open | REQ_sql_blob_create))
{
for (blb* blob = request->req_blobs; blob; blob = blob->blb_next)
cmp_blob(blob, true);
return;
}
// Before we get too far, make sure an eof field has been
// constructed. If not, do so now.
ref* reference;
if (!eof_field)
{
eof_field = MET_make_field(gpreGlob.utility_name, dtype_short, sizeof(SSHORT), false);
count_field = MET_make_field(gpreGlob.count_name, dtype_long, sizeof(SLONG), false);
slack_byte_field = MET_make_field(gpreGlob.slack_name, dtype_text, 1, false);
reference = (ref*) MSC_alloc(REF_LEN);
reference->ref_value = "0";
lit0 = MSC_unary(nod_literal, (gpre_nod*) reference);
reference = (ref*) MSC_alloc(REF_LEN);
reference->ref_value = "1";
lit1 = MSC_unary(nod_literal, (gpre_nod*) reference);
}
// Handle different request types differently
switch (request->req_type)
{
case REQ_create_database:
case REQ_ddl:
CMD_compile_ddl(request);
return;
case REQ_slice:
cmp_slice(request);
return;
case REQ_ready:
cmp_ready(request);
return;
case REQ_procedure:
cmp_procedure(request);
return;
}
// expand any incomplete references or values
expand_references(request->req_references);
expand_references(request->req_values);
// Initialize the blr string
request->req_blr = request->req_base = MSC_alloc(500);
request->req_length = 500;
if (request->req_flags & REQ_blr_version4)
request->add_byte(blr_version4);
else
request->add_byte(blr_version5);
// If there are values to be transmitted, make a port
// to hold them
if (request->req_values)
request->req_vport = make_port(request, request->req_values);
// If this is a FOR type request, an eof field reference needs
// to be generated. Do it.
switch (request->req_type)
{
case REQ_for:
case REQ_cursor:
case REQ_any:
reference = (ref*) MSC_alloc(REF_LEN);
reference->ref_field = eof_field;
reference->ref_next = request->req_references;
break;
case REQ_mass_update:
reference = (ref*) MSC_alloc(REF_LEN);
reference->ref_field = count_field;
reference->ref_next = request->req_references;
break;
default:
reference = request->req_references;
}
// Assume that a general port needs to be constructed.
gpre_port* port;
if ((request->req_type != REQ_insert) && (request->req_type != REQ_store2) &&
(request->req_type != REQ_set_generator))
{
request->req_primary = port = make_port(request, reference);
}
// Loop thru actions looking for something interesting to do. Not
// all action types are "interesting", so don't worry about missing
// ones.
upd* update;
for (act* action = request->req_actions; action; action = action->act_next)
{
switch (action->act_type)
{
case ACT_modify:
case ACT_erase:
case ACT_update:
update = (upd*) action->act_object;
expand_references(update->upd_references);
update->upd_port = make_port(request, update->upd_references);
if (!request->req_sync)
request->req_sync = make_port(request, 0);
break;
case ACT_store:
if (request->req_type == REQ_store2)
{
request->req_primary = make_port(request, action->act_object);
update_references(request->req_primary->por_references);
}
break;
case ACT_store2:
update = (upd*) action->act_object;
expand_references(update->upd_references);
update->upd_port = make_port(request, update->upd_references);
update_references(update->upd_port->por_references);
break;
case ACT_select:
case ACT_fetch:
cmp_fetch(action);
break;
}
}
cmp_blr(request);
request->add_byte(blr_eoc);
// Compute out final blr lengths
request->req_length = request->req_blr - request->req_base;
request->req_blr = request->req_base;
// Finally, assign identifiers to any blobs that may have been referenced
for (blb* blob = request->req_blobs; blob; blob = blob->blb_next)
cmp_blob(blob, false);
}
void JRDMET_init( gpre_dbb* db)
{
const int* relfld = relfields;
while (relfld[RFLD_R_NAME])
{
gpre_rel* relation = (gpre_rel*) MSC_alloc(REL_LEN);
relation->rel_database = db;
relation->rel_next = db->dbb_relations;
relation->rel_id = relfld[RFLD_R_ID];
db->dbb_relations = relation;
gpre_sym* symbol = (gpre_sym*) MSC_alloc(SYM_LEN);
relation->rel_symbol = symbol;
symbol->sym_type = SYM_relation;
symbol->sym_object = (gpre_ctx*) relation;
symbol->sym_string = names[relfld[RFLD_R_NAME]];
HSH_insert(symbol);
const int* fld = relfld + RFLD_RPT;
for (int n = 0; fld[RFLD_F_NAME]; ++n, fld += RFLD_F_LENGTH)
{
const gfld* gfield = &gfields[fld[RFLD_F_ID]];
gpre_fld* field = (gpre_fld*) MSC_alloc(FLD_LEN);
relation->rel_fields = field;
field->fld_relation = relation;
field->fld_next = relation->rel_fields;
field->fld_id = n;
field->fld_length = gfield->gfld_length;
field->fld_dtype = gfield->gfld_dtype;
field->fld_sub_type = gfield->gfld_sub_type;
if (field->fld_dtype == dtype_varying || field->fld_dtype == dtype_text)
{
field->fld_dtype = dtype_cstring;
field->fld_flags |= FLD_text;
if (gfield->gfld_sub_type == dsc_text_type_metadata)
{
if (gpreGlob.sw_language == lang_internal)
field->fld_flags |= FLD_charset;
else
field->fld_length *= 4;
field->fld_charset_id = CS_METADATA;
field->fld_collate_id = COLLATE_NONE;
field->fld_ttype = ttype_metadata;
}
else
{
if (gpreGlob.sw_language == lang_internal)
field->fld_flags |= FLD_charset;
field->fld_charset_id = CS_NONE;
field->fld_collate_id = COLLATE_NONE;
field->fld_ttype = ttype_none;
}
++field->fld_length;
}
else if (field->fld_dtype == dtype_blob)
{
field->fld_dtype = dtype_blob;
field->fld_flags |= FLD_blob;
if (gfield->gfld_sub_type == isc_blob_text)
field->fld_charset_id = CS_METADATA;
}
field->fld_symbol = symbol = (gpre_sym*) MSC_alloc(SYM_LEN);
symbol->sym_type = SYM_field;
symbol->sym_object = (gpre_ctx*) field;
symbol->sym_string = names[fld[RFLD_F_NAME]];
HSH_insert(symbol);
field->fld_global = symbol = (gpre_sym*) MSC_alloc(SYM_LEN);
symbol->sym_type = SYM_field;
symbol->sym_object = (gpre_ctx*) field;
symbol->sym_string = names[gfield->gfld_name];
}
relfld = fld + 1;
}
for (const rtyp* rtype = types; rtype->rtyp_name; rtype++)
{
field_type* type = (field_type*) MSC_alloc(TYP_LEN);
gpre_sym* symbol = (gpre_sym*) MSC_alloc(SYM_LEN);
type->typ_symbol = symbol;
type->typ_value = rtype->rtyp_value;
symbol->sym_type = SYM_type;
symbol->sym_object = (gpre_ctx*) type;
symbol->sym_string = rtype->rtyp_name;
HSH_insert(symbol);
}
}
