#ifndef _ECPG_LIB_EXTERN_H
#define _ECPG_LIB_EXTERN_H

#include "postgres_fe.h"
#include "libpq-fe.h"
#include "sqlca.h"

enum COMPAT_MODE
{
  ECPG_COMPAT_PGSQL = 0, ECPG_COMPAT_INFORMIX, ECPG_COMPAT_INFORMIX_SE
};

#define INFORMIX_MODE(X) ((X) == ECPG_COMPAT_INFORMIX || (X) == ECPG_COMPAT_INFORMIX_SE)

enum ARRAY_TYPE
{
  ECPG_ARRAY_NOT_SET, ECPG_ARRAY_ARRAY, ECPG_ARRAY_VECTOR, ECPG_ARRAY_NONE
};

/* Here are some methods used by the lib. */

/* Returns a pointer to a string containing a simple type name. */
void ECPGadd_mem (void *ptr, int lineno);

bool ECPGget_data (const PGresult *, int, int, int, enum ECPGttype type,
		   enum ECPGttype, char *, char *, long, long, long,
		   enum ARRAY_TYPE, enum COMPAT_MODE, bool);
struct connection *ECPGget_connection (const char *);
char *ECPGalloc (long, int);
char *ECPGrealloc (void *, long, int);
void ECPGfree (void *);
bool ECPGinit (const struct connection *, const char *, const int);
char *ECPGstrdup (const char *, int);
const char *ECPGtype_name (enum ECPGttype);
unsigned int ECPGDynamicType (Oid);
void ECPGfree_auto_mem (void);
void ECPGclear_auto_mem (void);

struct descriptor *ecpggetdescp (int, char *);

/* A generic varchar type. */
struct ECPGgeneric_varchar
{
  int len;
  char arr[1];
};

/*
 * type information cache
 */

struct ECPGtype_information_cache
{
  struct ECPGtype_information_cache *next;
  int oid;
  bool isarray;
};

/* structure to store one statement */
struct statement
{
  int lineno;
  char *command;
  struct connection *connection;
  enum COMPAT_MODE compat;
  bool force_indicator;
  struct variable *inlist;
  struct variable *outlist;
};

/* structure to store connections */
struct connection
{
  char *name;
  PGconn *connection;
  bool committed;
  int autocommit;
  struct ECPGtype_information_cache *cache_head;
  struct connection *next;
};

/* structure to store descriptors */
struct descriptor
{
  char *name;
  PGresult *result;
  struct descriptor *next;
  int count;
  struct descriptor_item *items;
};

extern struct descriptor *all_descriptors;

struct descriptor_item
{
  int num;
  char *data;
  int indicator;
  int length;
  int precision;
  int scale;
  int type;
  struct descriptor_item *next;
};

struct variable
{
  enum ECPGttype type;
  void *value;
  void *pointer;
  long varcharsize;
  long arrsize;
  long offset;
  enum ECPGttype ind_type;
  void *ind_value;
  void *ind_pointer;
  long ind_varcharsize;
  long ind_arrsize;
  long ind_offset;
  struct variable *next;
};

PGresult **ECPGdescriptor_lvalue (int line, const char *descriptor);

bool ECPGstore_result (const PGresult * results, int act_field,
		       const struct statement *stmt, struct variable *var);
bool ECPGstore_input(const int, const bool, const struct variable *, const char **, bool *);
void ECPGget_variable(va_list *, enum ECPGttype, struct variable *, bool);

/* SQLSTATE values generated or processed by ecpglib (intentionally
 * not exported -- users should refer to the codes directly) */

#define ECPG_SQLSTATE_NO_DATA				"02000"
#define ECPG_SQLSTATE_USING_CLAUSE_DOES_NOT_MATCH_PARAMETERS	"07001"
#define ECPG_SQLSTATE_USING_CLAUSE_DOES_NOT_MATCH_TARGETS		"07002"
#define ECPG_SQLSTATE_RESTRICTED_DATA_TYPE_ATTRIBUTE_VIOLATION	"07006"
#define ECPG_SQLSTATE_INVALID_DESCRIPTOR_INDEX		"07009"
#define ECPG_SQLSTATE_SQLCLIENT_UNABLE_TO_ESTABLISH_SQLCONNECTION	"08001"
#define ECPG_SQLSTATE_CONNECTION_DOES_NOT_EXIST		"08003"
#define ECPG_SQLSTATE_TRANSACTION_RESOLUTION_UNKNOWN	"08007"
#define ECPG_SQLSTATE_CARDINALITY_VIOLATION "21000"
#define ECPG_SQLSTATE_NULL_VALUE_NO_INDICATOR_PARAMETER "22002"
#define ECPG_SQLSTATE_ACTIVE_SQL_TRANSACTION		"25001"
#define ECPG_SQLSTATE_NO_ACTIVE_SQL_TRANSACTION		"25P01"
#define ECPG_SQLSTATE_INVALID_SQL_STATEMENT_NAME	"26000"
#define ECPG_SQLSTATE_INVALID_SQL_DESCRIPTOR_NAME	"33000"
#define ECPG_SQLSTATE_INVALID_CURSOR_NAME	"34000"
#define ECPG_SQLSTATE_SYNTAX_ERROR			"42601"
#define ECPG_SQLSTATE_DATATYPE_MISMATCH		"42804"
#define ECPG_SQLSTATE_DUPLICATE_CURSOR		"42P03"

/* implementation-defined internal errors of ecpg */
#define ECPG_SQLSTATE_ECPG_INTERNAL_ERROR	"YE000"
#define ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY	"YE001"

#endif /* _ECPG_LIB_EXTERN_H */