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/*
* functions needed for descriptor handling
*/
#include "postgres.h"
#include "extern.h"
/*
* assignment handling function (descriptor)
*/
struct assignment *assignments;
void
push_assignment(char *var, enum ECPGdtype value)
{
struct assignment *new = (struct assignment *) mm_alloc(sizeof(struct assignment));
new->next = assignments;
new->variable = mm_alloc(strlen(var) + 1);
strcpy(new->variable, var);
new->value = value;
assignments = new;
}
static void
drop_assignments(void)
{
while (assignments)
{
struct assignment *old_head = assignments;
assignments = old_head->next;
free(old_head->variable);
free(old_head);
}
}
static void
ECPGnumeric_lvalue(FILE *f, char *name)
{
const struct variable *v = find_variable(name);
switch (v->type->typ)
{
case ECPGt_short:
case ECPGt_int:
case ECPGt_long:
case ECPGt_unsigned_short:
case ECPGt_unsigned_int:
case ECPGt_unsigned_long:
fputs(name, yyout);
break;
default:
snprintf(errortext, sizeof errortext, "variable %s: numeric type needed"
,name);
mmerror(ET_ERROR, errortext);
break;
}
}
/*
* descriptor name lookup
*/
static struct descriptor *descriptors;
void
add_descriptor(char *name, char *connection)
{
struct descriptor *new = (struct descriptor *) mm_alloc(sizeof(struct descriptor));
new->next = descriptors;
new->name = mm_alloc(strlen(name) + 1);
strcpy(new->name, name);
if (connection)
{
new->connection = mm_alloc(strlen(connection) + 1);
strcpy(new->connection, connection);
}
else
new->connection = connection;
descriptors = new;
}
void
drop_descriptor(char *name, char *connection)
{
struct descriptor *i;
struct descriptor **lastptr = &descriptors;
for (i = descriptors; i; lastptr = &i->next, i = i->next)
{
if (!strcmp(name, i->name))
{
if ((!connection && !i->connection)
|| (connection && i->connection
&& !strcmp(connection, i->connection)))
{
*lastptr = i->next;
if (i->connection)
free(i->connection);
free(i->name);
free(i);
return;
}
}
}
snprintf(errortext, sizeof errortext, "unknown descriptor %s", name);
mmerror(ET_WARN, errortext);
}
struct descriptor
*
lookup_descriptor(char *name, char *connection)
{
struct descriptor *i;
for (i = descriptors; i; i = i->next)
{
if (!strcmp(name, i->name))
{
if ((!connection && !i->connection)
|| (connection && i->connection
&& !strcmp(connection, i->connection)))
return i;
}
}
snprintf(errortext, sizeof errortext, "unknown descriptor %s", name);
mmerror(ET_WARN, errortext);
return NULL;
}
void
output_get_descr_header(char *desc_name)
{
struct assignment *results;
fprintf(yyout, "{ ECPGget_desc_header(%d, \"%s\", &(", yylineno, desc_name);
for (results = assignments; results != NULL; results = results->next)
{
if (results->value == ECPGd_count)
ECPGnumeric_lvalue(yyout, results->variable);
else
{
snprintf(errortext, sizeof errortext, "unknown descriptor header item '%d'", results->value);
mmerror(ET_WARN, errortext);
}
}
drop_assignments();
fprintf(yyout, "));\n");
whenever_action(3);
}
void
output_get_descr(char *desc_name, char *index)
{
struct assignment *results;
fprintf(yyout, "{ ECPGget_desc(%d,\"%s\",%s,", yylineno, desc_name, index);
for (results = assignments; results != NULL; results = results->next)
{
const struct variable *v = find_variable(results->variable);
switch (results->value)
{
case ECPGd_nullable:
mmerror(ET_WARN, "nullable is always 1");
break;
case ECPGd_key_member:
mmerror(ET_WARN, "key_member is always 0");
break;
default:
break;
}
fprintf(yyout, "%s,", get_dtype(results->value));
ECPGdump_a_type(yyout, v->name, v->type, NULL, NULL, NULL, NULL);
}
drop_assignments();
fputs("ECPGd_EODT);\n", yyout);
whenever_action(2 | 1);
}
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