Harmonize parameter names in contrib code.

Make sure that function declarations use names that exactly match the
corresponding names from function definitions in contrib code.

Like other recent commits that cleaned up function parameter names, this
commit was written with help from clang-tidy.

Author: Peter Geoghegan <pg@bowt.ie>
Discussion: https://postgr.es/m/CAH2-WznJt9CMM9KJTMjJh_zbL5hD9oX44qdJ4aqZtjFi-zA3Tg@mail.gmail.com

contrib/amcheck/verify_nbtree.c

@@ -159,7 +159,7 @@ static void bt_child_highkey_check(BtreeCheckState *state,
 								   Page loaded_child,
 								   uint32 target_level);
 static void bt_downlink_missing_check(BtreeCheckState *state, bool rightsplit,
-									  BlockNumber targetblock, Page target);
+									  BlockNumber blkno, Page page);
 static void bt_tuple_present_callback(Relation index, ItemPointer tid,
 									  Datum *values, bool *isnull,
 									  bool tupleIsAlive, void *checkstate);

contrib/cube/cube.c

@@ -96,7 +96,7 @@ int32		cube_cmp_v0(NDBOX *a, NDBOX *b);
 bool		cube_contains_v0(NDBOX *a, NDBOX *b);
 bool		cube_overlap_v0(NDBOX *a, NDBOX *b);
 NDBOX	   *cube_union_v0(NDBOX *a, NDBOX *b);
-void		rt_cube_size(NDBOX *a, double *sz);
+void		rt_cube_size(NDBOX *a, double *size);
 NDBOX	   *g_cube_binary_union(NDBOX *r1, NDBOX *r2, int *sizep);
 bool		g_cube_leaf_consistent(NDBOX *key, NDBOX *query, StrategyNumber strategy);
 bool		g_cube_internal_consistent(NDBOX *key, NDBOX *query, StrategyNumber strategy);

contrib/dblink/dblink.c

@@ -114,7 +114,7 @@ static void dblink_security_check(PGconn *conn, remoteConn *rconn);
 static void dblink_res_error(PGconn *conn, const char *conname, PGresult *res,
 							 bool fail, const char *fmt,...) pg_attribute_printf(5, 6);
 static char *get_connect_string(const char *servername);
-static char *escape_param_str(const char *from);
+static char *escape_param_str(const char *str);
 static void validate_pkattnums(Relation rel,
 							   int2vector *pkattnums_arg, int32 pknumatts_arg,
 							   int **pkattnums, int *pknumatts);

contrib/fuzzystrmatch/dmetaphone.c

@@ -117,7 +117,7 @@ The remaining code is authored by Andrew Dunstan <amdunstan@ncshp.org> and
 #include <ctype.h>
 
 /* prototype for the main function we got from the perl module */
-static void DoubleMetaphone(char *, char **);
+static void DoubleMetaphone(char *str, char **codes);
 
 #ifndef DMETAPHONE_MAIN
 

contrib/intarray/_int.h

@@ -114,7 +114,7 @@ ArrayType  *new_intArrayType(int num);
 ArrayType  *copy_intArrayType(ArrayType *a);
 ArrayType  *resize_intArrayType(ArrayType *a, int num);
 int			internal_size(int *a, int len);
-ArrayType  *_int_unique(ArrayType *a);
+ArrayType  *_int_unique(ArrayType *r);
 int32		intarray_match_first(ArrayType *a, int32 elem);
 ArrayType  *intarray_add_elem(ArrayType *a, int32 elem);
 ArrayType  *intarray_concat_arrays(ArrayType *a, ArrayType *b);

contrib/intarray/_int_selfuncs.c

@@ -34,8 +34,8 @@ PG_FUNCTION_INFO_V1(_int_contained_joinsel);
 PG_FUNCTION_INFO_V1(_int_matchsel);
 
 
-static Selectivity int_query_opr_selec(ITEM *item, Datum *values, float4 *freqs,
-									   int nmncelems, float4 minfreq);
+static Selectivity int_query_opr_selec(ITEM *item, Datum *mcelems, float4 *mcefreqs,
+									   int nmcelems, float4 minfreq);
 static int	compare_val_int4(const void *a, const void *b);
 
 /*

contrib/intarray/_int_tool.c

@@ -382,14 +382,14 @@ intarray_concat_arrays(ArrayType *a, ArrayType *b)
 }
 
 ArrayType *
-int_to_intset(int32 n)
+int_to_intset(int32 elem)
 {
 	ArrayType  *result;
 	int32	   *aa;
 
 	result = new_intArrayType(1);
 	aa = ARRPTR(result);
-	aa[0] = n;
+	aa[0] = elem;
 	return result;
 }
 

contrib/ltree/ltree.h

@@ -206,7 +206,7 @@ bool		ltree_execute(ITEM *curitem, void *checkval,
 
 int			ltree_compare(const ltree *a, const ltree *b);
 bool		inner_isparent(const ltree *c, const ltree *p);
-bool		compare_subnode(ltree_level *t, char *q, int len,
+bool		compare_subnode(ltree_level *t, char *qn, int len,
 							int (*cmpptr) (const char *, const char *, size_t), bool anyend);
 ltree	   *lca_inner(ltree **a, int len);
 int			ltree_strncasecmp(const char *a, const char *b, size_t s);

contrib/oid2name/oid2name.c

@@ -48,15 +48,15 @@ struct options
 
 /* function prototypes */
 static void help(const char *progname);
-void		get_opts(int, char **, struct options *);
+void		get_opts(int argc, char **argv, struct options *my_opts);
 void		add_one_elt(char *eltname, eary *eary);
 char	   *get_comma_elts(eary *eary);
-PGconn	   *sql_conn(struct options *);
-int			sql_exec(PGconn *, const char *sql, bool quiet);
-void		sql_exec_dumpalldbs(PGconn *, struct options *);
-void		sql_exec_dumpalltables(PGconn *, struct options *);
-void		sql_exec_searchtables(PGconn *, struct options *);
-void		sql_exec_dumpalltbspc(PGconn *, struct options *);
+PGconn	   *sql_conn(struct options *my_opts);
+int			sql_exec(PGconn *conn, const char *todo, bool quiet);
+void		sql_exec_dumpalldbs(PGconn *conn, struct options *opts);
+void		sql_exec_dumpalltables(PGconn *conn, struct options *opts);
+void		sql_exec_searchtables(PGconn *conn, struct options *opts);
+void		sql_exec_dumpalltbspc(PGconn *conn, struct options *opts);
 
 /* function to parse command line options and check for some usage errors. */
 void

contrib/pgcrypto/mbuf.h

@@ -82,33 +82,33 @@ int			mbuf_avail(MBuf *mbuf);
 int			mbuf_size(MBuf *mbuf);
 int			mbuf_grab(MBuf *mbuf, int len, uint8 **data_p);
 int			mbuf_steal_data(MBuf *mbuf, uint8 **data_p);
-int			mbuf_append(MBuf *dst, const uint8 *buf, int cnt);
+int			mbuf_append(MBuf *dst, const uint8 *buf, int len);
 int			mbuf_free(MBuf *mbuf);
 
 /*
  * Push filter
  */
-int			pushf_create(PushFilter **res, const PushFilterOps *ops, void *init_arg,
-						 PushFilter *next);
+int			pushf_create(PushFilter **mp_p, const PushFilterOps *op,
+						 void *init_arg, PushFilter *next);
 int			pushf_write(PushFilter *mp, const uint8 *data, int len);
 void		pushf_free_all(PushFilter *mp);
 void		pushf_free(PushFilter *mp);
 int			pushf_flush(PushFilter *mp);
 
-int			pushf_create_mbuf_writer(PushFilter **mp_p, MBuf *mbuf);
+int			pushf_create_mbuf_writer(PushFilter **res, MBuf *dst);
 
 /*
  * Pull filter
  */
-int			pullf_create(PullFilter **res, const PullFilterOps *ops,
+int			pullf_create(PullFilter **pf_p, const PullFilterOps *op,
 						 void *init_arg, PullFilter *src);
-int			pullf_read(PullFilter *mp, int len, uint8 **data_p);
-int			pullf_read_max(PullFilter *mp, int len,
+int			pullf_read(PullFilter *pf, int len, uint8 **data_p);
+int			pullf_read_max(PullFilter *pf, int len,
 						   uint8 **data_p, uint8 *tmpbuf);
-void		pullf_free(PullFilter *mp);
+void		pullf_free(PullFilter *pf);
 int			pullf_read_fixed(PullFilter *src, int len, uint8 *dst);
 
-int			pullf_create_mbuf_reader(PullFilter **pf_p, MBuf *mbuf);
+int			pullf_create_mbuf_reader(PullFilter **mp_p, MBuf *src);
 
 #define GETBYTE(pf, dst) \
 	do { \

contrib/pgcrypto/pgcrypto.c

@@ -45,7 +45,8 @@ PG_MODULE_MAGIC;
 /* private stuff */
 
 typedef int (*PFN) (const char *name, void **res);
-static void *find_provider(text *name, PFN pf, const char *desc, int silent);
+static void *find_provider(text *name, PFN provider_lookup, const char *desc,
+						   int silent);
 
 /* SQL function: hash(bytea, text) returns bytea */
 PG_FUNCTION_INFO_V1(pg_digest);

contrib/pgcrypto/pgp.h

@@ -236,9 +236,9 @@ struct PGP_PubKey
 	int			can_encrypt;
 };
 
-int			pgp_init(PGP_Context **ctx);
+int			pgp_init(PGP_Context **ctx_p);
 int			pgp_encrypt(PGP_Context *ctx, MBuf *src, MBuf *dst);
-int			pgp_decrypt(PGP_Context *ctx, MBuf *src, MBuf *dst);
+int			pgp_decrypt(PGP_Context *ctx, MBuf *msrc, MBuf *mdst);
 int			pgp_free(PGP_Context *ctx);
 
 int			pgp_get_digest_code(const char *name);
@@ -246,7 +246,7 @@ int			pgp_get_cipher_code(const char *name);
 const char *pgp_get_digest_name(int code);
 
 int			pgp_set_cipher_algo(PGP_Context *ctx, const char *name);
-int			pgp_set_s2k_mode(PGP_Context *ctx, int type);
+int			pgp_set_s2k_mode(PGP_Context *ctx, int mode);
 int			pgp_set_s2k_count(PGP_Context *ctx, int count);
 int			pgp_set_s2k_cipher_algo(PGP_Context *ctx, const char *name);
 int			pgp_set_s2k_digest_algo(PGP_Context *ctx, const char *name);
@@ -259,22 +259,22 @@ int			pgp_set_text_mode(PGP_Context *ctx, int mode);
 int			pgp_set_unicode_mode(PGP_Context *ctx, int mode);
 int			pgp_get_unicode_mode(PGP_Context *ctx);
 
-int			pgp_set_symkey(PGP_Context *ctx, const uint8 *key, int klen);
+int			pgp_set_symkey(PGP_Context *ctx, const uint8 *key, int len);
 int			pgp_set_pubkey(PGP_Context *ctx, MBuf *keypkt,
-						   const uint8 *key, int klen, int pubtype);
+						   const uint8 *key, int key_len, int pubtype);
 
 int			pgp_get_keyid(MBuf *pgp_data, char *dst);
 
 /* internal functions */
 
-int			pgp_load_digest(int c, PX_MD **res);
-int			pgp_load_cipher(int c, PX_Cipher **res);
-int			pgp_get_cipher_key_size(int c);
-int			pgp_get_cipher_block_size(int c);
+int			pgp_load_digest(int code, PX_MD **res);
+int			pgp_load_cipher(int code, PX_Cipher **res);
+int			pgp_get_cipher_key_size(int code);
+int			pgp_get_cipher_block_size(int code);
 
 int			pgp_s2k_fill(PGP_S2K *s2k, int mode, int digest_algo, int count);
 int			pgp_s2k_read(PullFilter *src, PGP_S2K *s2k);
-int			pgp_s2k_process(PGP_S2K *s2k, int cipher, const uint8 *key, int klen);
+int			pgp_s2k_process(PGP_S2K *s2k, int cipher, const uint8 *key, int key_len);
 
 typedef struct PGP_CFB PGP_CFB;
 int			pgp_cfb_create(PGP_CFB **ctx_p, int algo,
@@ -316,11 +316,11 @@ int			pgp_mpi_write(PushFilter *dst, PGP_MPI *n);
 int			pgp_mpi_hash(PX_MD *md, PGP_MPI *n);
 unsigned	pgp_mpi_cksum(unsigned cksum, PGP_MPI *n);
 
-int			pgp_elgamal_encrypt(PGP_PubKey *pk, PGP_MPI *m,
-								PGP_MPI **c1, PGP_MPI **c2);
-int			pgp_elgamal_decrypt(PGP_PubKey *pk, PGP_MPI *c1, PGP_MPI *c2,
-								PGP_MPI **m);
-int			pgp_rsa_encrypt(PGP_PubKey *pk, PGP_MPI *m, PGP_MPI **c);
-int			pgp_rsa_decrypt(PGP_PubKey *pk, PGP_MPI *c, PGP_MPI **m);
+int			pgp_elgamal_encrypt(PGP_PubKey *pk, PGP_MPI *_m,
+								PGP_MPI **c1_p, PGP_MPI **c2_p);
+int			pgp_elgamal_decrypt(PGP_PubKey *pk, PGP_MPI *_c1, PGP_MPI *_c2,
+								PGP_MPI **msg_p);
+int			pgp_rsa_encrypt(PGP_PubKey *pk, PGP_MPI *_m, PGP_MPI **c_p);
+int			pgp_rsa_decrypt(PGP_PubKey *pk, PGP_MPI *_c, PGP_MPI **m_p);
 
 extern struct PullFilterOps pgp_decrypt_filter;

contrib/pgcrypto/px-crypt.h

@@ -48,8 +48,8 @@
 /*
  * main interface
  */
-char	   *px_crypt(const char *psw, const char *salt, char *buf, unsigned buflen);
-int			px_gen_salt(const char *salt_type, char *dst, int rounds);
+char	   *px_crypt(const char *psw, const char *salt, char *buf, unsigned len);
+int			px_gen_salt(const char *salt_type, char *buf, int rounds);
 
 /*
  * internal functions
@@ -77,6 +77,6 @@ char	   *px_crypt_des(const char *key, const char *setting);
 
 /* crypt-md5.c */
 char	   *px_crypt_md5(const char *pw, const char *salt,
-						 char *dst, unsigned dstlen);
+						 char *passwd, unsigned dstlen);
 
 #endif							/* _PX_CRYPT_H */

contrib/pgcrypto/px.h

@@ -176,7 +176,7 @@ int			px_find_combo(const char *name, PX_Combo **res);
 void		px_THROW_ERROR(int err) pg_attribute_noreturn();
 const char *px_strerror(int err);
 
-const char *px_resolve_alias(const PX_Alias *aliases, const char *name);
+const char *px_resolve_alias(const PX_Alias *list, const char *name);
 
 void		px_set_debug_handler(void (*handler) (const char *));
 

contrib/postgres_fdw/deparse.c

@@ -149,7 +149,7 @@ static void deparseReturningList(StringInfo buf, RangeTblEntry *rte,
 static void deparseColumnRef(StringInfo buf, int varno, int varattno,
 							 RangeTblEntry *rte, bool qualify_col);
 static void deparseRelation(StringInfo buf, Relation rel);
-static void deparseExpr(Expr *expr, deparse_expr_cxt *context);
+static void deparseExpr(Expr *node, deparse_expr_cxt *context);
 static void deparseVar(Var *node, deparse_expr_cxt *context);
 static void deparseConst(Const *node, deparse_expr_cxt *context, int showtype);
 static void deparseParam(Param *node, deparse_expr_cxt *context);

contrib/postgres_fdw/postgres_fdw.c

@@ -457,7 +457,7 @@ static PgFdwModifyState *create_foreign_modify(EState *estate,
 											   Plan *subplan,
 											   char *query,
 											   List *target_attrs,
-											   int len,
+											   int values_end,
 											   bool has_returning,
 											   List *retrieved_attrs);
 static TupleTableSlot **execute_foreign_modify(EState *estate,

contrib/postgres_fdw/postgres_fdw.h

@@ -226,7 +226,7 @@ extern EquivalenceMember *find_em_for_rel_target(PlannerInfo *root,
 												 RelOptInfo *rel);
 extern List *build_tlist_to_deparse(RelOptInfo *foreignrel);
 extern void deparseSelectStmtForRel(StringInfo buf, PlannerInfo *root,
-									RelOptInfo *foreignrel, List *tlist,
+									RelOptInfo *rel, List *tlist,
 									List *remote_conds, List *pathkeys,
 									bool has_final_sort, bool has_limit,
 									bool is_subquery,

contrib/seg/seg.c

@@ -92,7 +92,7 @@ PG_FUNCTION_INFO_V1(seg_different);
 /*
 ** Auxiliary functions
 */
-static int	restore(char *s, float val, int n);
+static int	restore(char *result, float val, int n);
 
 
 /*****************************************************************************

contrib/seg/segdata.h

@@ -12,7 +12,7 @@ typedef struct SEG
 } SEG;
 
 /* in seg.c */
-extern int	significant_digits(const char *str);
+extern int	significant_digits(const char *s);
 
 /* in segscan.l */
 extern int	seg_yylex(void);

contrib/tablefunc/tablefunc.c

@@ -51,9 +51,9 @@ static Tuplestorestate *get_crosstab_tuplestore(char *sql,
 												HTAB *crosstab_hash,
 												TupleDesc tupdesc,
 												bool randomAccess);
-static void validateConnectbyTupleDesc(TupleDesc tupdesc, bool show_branch, bool show_serial);
-static bool compatCrosstabTupleDescs(TupleDesc tupdesc1, TupleDesc tupdesc2);
-static void compatConnectbyTupleDescs(TupleDesc tupdesc1, TupleDesc tupdesc2);
+static void validateConnectbyTupleDesc(TupleDesc td, bool show_branch, bool show_serial);
+static bool compatCrosstabTupleDescs(TupleDesc ret_tupdesc, TupleDesc sql_tupdesc);
+static void compatConnectbyTupleDescs(TupleDesc ret_tupdesc, TupleDesc sql_tupdesc);
 static void get_normal_pair(float8 *x1, float8 *x2);
 static Tuplestorestate *connectby(char *relname,
 								  char *key_fld,

contrib/test_decoding/test_decoding.c

@@ -60,7 +60,7 @@ static void pg_output_begin(LogicalDecodingContext *ctx,
 static void pg_decode_commit_txn(LogicalDecodingContext *ctx,
 								 ReorderBufferTXN *txn, XLogRecPtr commit_lsn);
 static void pg_decode_change(LogicalDecodingContext *ctx,
-							 ReorderBufferTXN *txn, Relation rel,
+							 ReorderBufferTXN *txn, Relation relation,
 							 ReorderBufferChange *change);
 static void pg_decode_truncate(LogicalDecodingContext *ctx,
 							   ReorderBufferTXN *txn,
@@ -69,7 +69,7 @@ static void pg_decode_truncate(LogicalDecodingContext *ctx,
 static bool pg_decode_filter(LogicalDecodingContext *ctx,
 							 RepOriginId origin_id);
 static void pg_decode_message(LogicalDecodingContext *ctx,
-							  ReorderBufferTXN *txn, XLogRecPtr message_lsn,
+							  ReorderBufferTXN *txn, XLogRecPtr lsn,
 							  bool transactional, const char *prefix,
 							  Size sz, const char *message);
 static bool pg_decode_filter_prepare(LogicalDecodingContext *ctx,
@@ -109,7 +109,7 @@ static void pg_decode_stream_change(LogicalDecodingContext *ctx,
 									Relation relation,
 									ReorderBufferChange *change);
 static void pg_decode_stream_message(LogicalDecodingContext *ctx,
-									 ReorderBufferTXN *txn, XLogRecPtr message_lsn,
+									 ReorderBufferTXN *txn, XLogRecPtr lsn,
 									 bool transactional, const char *prefix,
 									 Size sz, const char *message);
 static void pg_decode_stream_truncate(LogicalDecodingContext *ctx,