/*------------------------------------------------------------------------- * * libpq.h-- * POSTGRES LIBPQ buffer structure definitions. * * * Copyright (c) 1994, Regents of the University of California * * $Id: libpq.h,v 1.8 1997/09/08 21:52:36 momjian Exp $ * * NOTES * This file contains definitions for structures and * externs for functions used by both frontend applications * and the POSTGRES backend. See the files libpq-fe.h and * libpq-be.h for frontend/backend specific information * *------------------------------------------------------------------------- */ #ifndef LIBPQ_H #define LIBPQ_H #include /* ---------------- * PQArgBlock -- * Information (pointer to array of this structure) required * for the PQfn() call. * ---------------- */ typedef struct { int len; int isint; union { int *ptr; /* can't use void (dec compiler barfs) */ int integer; } u; } PQArgBlock; /* ---------------- * TypeBlock -- * Information about an attribute. * ---------------- */ #define NameLength 16 typedef struct TypeBlock { char name[NAMEDATALEN]; /* name of the attribute */ int adtid; /* adtid of the type */ int adtsize; /* adtsize of the type */ } TypeBlock; /* ---------------- * TupleBlock -- * Data of a tuple. * ---------------- */ #define TupleBlockSize 100 typedef struct TupleBlock { char **values[TupleBlockSize]; /* an array of tuples */ int *lengths[TupleBlockSize]; /* an array of length vec. * foreach tuple */ struct TupleBlock *next; /* next tuple block */ int tuple_index; /* current tuple index */ } TupleBlock; /* ---------------- * GroupBuffer -- * A group of tuples with the same attributes. * ---------------- */ typedef struct GroupBuffer { int no_tuples; /* number of tuples in this group */ int no_fields; /* number of attributes */ TypeBlock *types; /* types of the attributes */ TupleBlock *tuples; /* tuples in this group */ struct GroupBuffer *next; /* next group */ } GroupBuffer; /* ---------------- * PortalBuffer -- * Data structure of a portal buffer. * ---------------- */ typedef struct PortalBuffer { int rule_p; /* 1 if this is an asynchronized portal. */ int no_tuples; /* number of tuples in this portal buffer */ int no_groups; /* number of tuple groups */ GroupBuffer *groups; /* linked list of tuple groups */ } PortalBuffer; /* ---------------- * PortalEntry -- * an entry in the global portal table * * Note: the portalcxt is only meaningful for PQcalls made from * within a postgres backend. frontend apps should ignore it. * ---------------- */ #define PortalNameLength 32 typedef struct PortalEntry { char name[PortalNameLength]; /* name of this portal */ PortalBuffer *portal; /* tuples contained in this portal */ Pointer portalcxt; /* memory context (for backend) */ Pointer result; /* result for PQexec */ } PortalEntry; #define PORTALS_INITIAL_SIZE 32 #define PORTALS_GROW_BY 32 /* in portalbuf.c */ extern PortalEntry **portals; extern size_t portals_array_size; /* * Asynchronous notification */ typedef struct PQNotifyList { char relname[NAMEDATALEN]; /* name of relation containing * data */ int be_pid; /* process id of backend */ int valid; /* has this already been handled by user. */ /* SLNode Node; */ } PQNotifyList; /* * Exceptions. */ #define libpq_raise(X, Y) ExcRaise((Exception *)(X), (ExcDetail) (Y),\ (ExcData)0, (ExcMessage) 0) /* in portal.c */ extern Exception MemoryError, PortalError, PostquelError, ProtocolError; /* * POSTGRES backend dependent Constants. */ /* ERROR_MSG_LENGTH should really be the same as ELOG_MAXLEN in utils/elog.h*/ #define ERROR_MSG_LENGTH 4096 #define COMMAND_LENGTH 20 #define REMARK_LENGTH 80 extern char PQerrormsg[ERROR_MSG_LENGTH]; /* in portal.c */ /* * External functions. */ /* * prototypes for functions in portal.c */ extern void pqdebug(char *target, char *msg); extern void pqdebug2(char *target, char *msg1, char *msg2); extern void PQtrace(void); extern void PQuntrace(void); extern int PQnportals(int rule_p); extern void PQpnames(char **pnames, int rule_p); extern PortalBuffer *PQparray(char *pname); extern int PQrulep(PortalBuffer *portal); extern int PQntuples(PortalBuffer *portal); extern int PQninstances(PortalBuffer *portal); extern int PQngroups(PortalBuffer *portal); extern int PQntuplesGroup(PortalBuffer *portal, int group_index); extern int PQninstancesGroup(PortalBuffer *portal, int group_index); extern int PQnfieldsGroup(PortalBuffer *portal, int group_index); extern int PQfnumberGroup(PortalBuffer *portal, int group_index, char *field_name); extern char *PQfnameGroup(PortalBuffer *portal, int group_index, int field_number); extern int PQftypeGroup(PortalBuffer *portal, int group_index, int field_number); extern int PQfsizeGroup(PortalBuffer *portal, int group_index, int field_number); extern GroupBuffer *PQgroup(PortalBuffer *portal, int tuple_index); extern int PQgetgroup(PortalBuffer *portal, int tuple_index); extern int PQnfields(PortalBuffer *portal, int tuple_index); extern int PQfnumber(PortalBuffer *portal, int tuple_index, char *field_name); extern char *PQfname(PortalBuffer *portal, int tuple_index, int field_number); extern int PQftype(PortalBuffer *portal, int tuple_index, int field_number); extern int PQfsize(PortalBuffer *portal, int tuple_index, int field_number); extern int PQsametype(PortalBuffer *portal, int tuple_index1, int tuple_index2); extern char *PQgetvalue(PortalBuffer *portal, int tuple_index, int field_number); extern char *PQgetAttr(PortalBuffer *portal, int tuple_index, int field_number); extern int PQgetlength(PortalBuffer *portal, int tuple_index, int field_number); extern void PQclear(char *pname); extern void PQcleanNotify(void); extern void PQnotifies_init(void); extern PQNotifyList *PQnotifies(void); extern void PQremoveNotify(PQNotifyList *nPtr); extern void PQappendNotify(char *relname, int pid); /* * prototypes for functions in portalbuf.c */ extern caddr_t pbuf_alloc(size_t size); extern void pbuf_free(caddr_t pointer); extern PortalBuffer *pbuf_addPortal(void); extern GroupBuffer *pbuf_addGroup(PortalBuffer *portal); extern TypeBlock *pbuf_addTypes(int n); extern TupleBlock *pbuf_addTuples(void); extern char **pbuf_addTuple(int n); extern int *pbuf_addTupleValueLengths(int n); extern char *pbuf_addValues(int n); extern PortalEntry *pbuf_addEntry(void); extern void pbuf_freeEntry(int i); extern void pbuf_freeTypes(TypeBlock *types); extern void pbuf_freeTuples(TupleBlock *tuples, int no_tuples, int no_fields); extern void pbuf_freeGroup(GroupBuffer *group); extern void pbuf_freePortal(PortalBuffer *portal); extern int pbuf_getIndex(char *pname); extern void pbuf_setportalinfo(PortalEntry *entry, char *pname); extern PortalEntry *pbuf_setup(char *pname); extern void pbuf_close(char *pname); extern GroupBuffer *pbuf_findGroup(PortalBuffer *portal, int group_index); extern int pbuf_findFnumber(GroupBuffer *group, char *field_name); extern void pbuf_checkFnumber(GroupBuffer *group, int field_number); extern char *pbuf_findFname(GroupBuffer *group, int field_number); /* * prototypes for functions in pqcomm.c */ extern void pq_init(int fd); extern void pq_gettty(char *tp); extern int pq_getport(void); extern void pq_close(void); extern void pq_flush(void); extern int pq_getstr(char *s, int maxlen); extern int PQgetline(char *s, int maxlen); extern int PQputline(char *s); extern int pq_getnchar(char *s, int off, int maxlen); extern int pq_getint(int b); extern void pq_putstr(char *s); extern void pq_putnchar(char *s, int n); extern void pq_putint(int i, int b); extern int pq_sendoob(char *msg, int len); extern int pq_recvoob(char *msgPtr, int *lenPtr); extern int pq_getinaddr(struct sockaddr_in * sin, char *host, int port); extern int pq_getinserv(struct sockaddr_in * sin, char *host, char *serv); extern int pq_connect(char *dbname, char *user, char *args, char *hostName, char *debugTty, char *execFile, short portName); extern int StreamOpen(char *hostName, short portName, Port *port); extern void pq_regoob(void (*fptr) ()); extern void pq_unregoob(void); extern void pq_async_notify(void); extern int StreamServerPort(char *hostName, short portName, int *fdP); extern int StreamConnection(int server_fd, Port *port); extern void StreamClose(int sock); #endif /* LIBPQ_H */