Get rid of obsolete parse_version helper function.

For getting the server's version in numeric form, use PQserverVersion().
It does the exact same parsing as dumputils.c's parse_version(), and has
been around in libpq for a long time. For the client's version, just use
the PG_VERSION_NUM constant.

src/bin/pg_dump/dumputils.c

@@ -456,29 +456,6 @@ appendByteaLiteral(PQExpBuffer buf, const unsigned char *str, size_t length,
 }
 
 
-/*
- * Convert backend's version string into a number.
- */
-int
-parse_version(const char *versionString)
-{
-	int			cnt;
-	int			vmaj,
-				vmin,
-				vrev;
-
-	cnt = sscanf(versionString, "%d.%d.%d", &vmaj, &vmin, &vrev);
-
-	if (cnt < 2)
-		return -1;
-
-	if (cnt == 2)
-		vrev = 0;
-
-	return (100 * vmaj + vmin) * 100 + vrev;
-}
-
-
 /*
  * Deconstruct the text representation of a 1-dimensional Postgres array
  * into individual items.

src/bin/pg_dump/dumputils.h

@@ -60,7 +60,6 @@ extern void appendStringLiteralDQ(PQExpBuffer buf, const char *str,
 extern void appendByteaLiteral(PQExpBuffer buf,
 				   const unsigned char *str, size_t length,
 				   bool std_strings);
-extern int	parse_version(const char *versionString);
 extern bool parsePGArray(const char *atext, char ***itemarray, int *nitems);
 extern bool buildACLCommands(const char *name, const char *subname,
 				 const char *type, const char *acls, const char *owner,

src/bin/pg_dump/pg_backup_db.c

@@ -29,39 +29,23 @@ static void _check_database_version(ArchiveHandle *AH);
 static PGconn *_connectDB(ArchiveHandle *AH, const char *newdbname, const char *newUser);
 static void notice_processor(void *arg, const char *message);
 
-static int
-_parse_version(const char *versionString)
-{
-	int			v;
-
-	v = parse_version(versionString);
-	if (v < 0)
-		exit_horribly(modulename, "could not parse version string \"%s\"\n", versionString);
-
-	return v;
-}
-
 static void
 _check_database_version(ArchiveHandle *AH)
 {
-	int			myversion;
 	const char *remoteversion_str;
 	int			remoteversion;
 
-	myversion = _parse_version(PG_VERSION);
-
 	remoteversion_str = PQparameterStatus(AH->connection, "server_version");
-	if (!remoteversion_str)
+	remoteversion = PQserverVersion(AH->connection);
+	if (remoteversion == 0 || !remoteversion_str)
 		exit_horribly(modulename, "could not get server_version from libpq\n");
 
-	remoteversion = _parse_version(remoteversion_str);
-
 	AH->public.remoteVersionStr = pg_strdup(remoteversion_str);
 	AH->public.remoteVersion = remoteversion;
 	if (!AH->archiveRemoteVersion)
 		AH->archiveRemoteVersion = AH->public.remoteVersionStr;
 
-	if (myversion != remoteversion
+	if (remoteversion != PG_VERSION_NUM
 		&& (remoteversion < AH->public.minRemoteVersion ||
 			remoteversion > AH->public.maxRemoteVersion))
 	{

src/bin/pg_dump/pg_dump.c

@@ -295,7 +295,6 @@ main(int argc, char **argv)
 	int			outputNoOwner = 0;
 	char	   *outputSuperuser = NULL;
 	char	   *use_role = NULL;
-	int			my_version;
 	int			optindex;
 	RestoreOptions *ropt;
 	ArchiveFormat archiveFormat = archUnknown;
@@ -620,16 +619,12 @@ main(int argc, char **argv)
 	/* Let the archiver know how noisy to be */
 	fout->verbose = g_verbose;
 
-	my_version = parse_version(PG_VERSION);
-	if (my_version < 0)
-		exit_horribly(NULL, "could not parse version string \"%s\"\n", PG_VERSION);
-
 	/*
 	 * We allow the server to be back to 7.0, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
 	fout->minRemoteVersion = 70000;
-	fout->maxRemoteVersion = (my_version / 100) * 100 + 99;
+	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
 

src/bin/pg_dump/pg_dumpall.c

@@ -1873,21 +1873,15 @@ connectDatabase(const char *dbname, const char *connection_string,
 		fprintf(stderr, _("%s: could not get server version\n"), progname);
 		exit_nicely(1);
 	}
-	server_version = parse_version(remoteversion_str);
-	if (server_version < 0)
+	server_version = PQserverVersion(conn);
+	if (server_version == 0)
 	{
 		fprintf(stderr, _("%s: could not parse server version \"%s\"\n"),
 				progname, remoteversion_str);
 		exit_nicely(1);
 	}
 
-	my_version = parse_version(PG_VERSION);
-	if (my_version < 0)
-	{
-		fprintf(stderr, _("%s: could not parse version \"%s\"\n"),
-				progname, PG_VERSION);
-		exit_nicely(1);
-	}
+	my_version = PG_VERSION_NUM;
 
 	/*
 	 * We allow the server to be back to 7.0, and up to any minor release of

src/bin/psql/command.c

@@ -1708,7 +1708,7 @@ connection_warnings(bool in_startup)
 {
 	if (!pset.quiet && !pset.notty)
 	{
-		int			client_ver = parse_version(PG_VERSION);
+		int			client_ver = PG_VERSION_NUM;
 
 		if (pset.sversion != client_ver)
 		{