/* @(#)rpc_svcout.c	1.2 87/11/24 3.9 RPCSRC */
/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 * 
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 * 
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 * 
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 * 
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 * 
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */

/*
 * rpc_svcout.c, Server-skeleton outputter for the RPC protocol compiler
 * Copyright (C) 1987, Sun Microsytsems, Inc. 
 */
#include <afsconfig.h>
#include <afs/param.h>


#include <stdio.h>
#include <string.h>
#include "rpc_scan.h"
#include "rpc_parse.h"
#include "rpc_util.h"

static char RQSTP[] = "rqstp";
static char TRANSP[] = "transp";
static char ARG[] = "argument";
static char RESULT[] = "result";
static char ROUTINE[] = "local";

/* static prototypes */
static void write_program(definition * def, char *storage);
static void printerr(char *err, char *transp);
static void printif(char *proc, char *transp, char *prefix, char *arg);


/*
 * write most of the service, that is, everything but the registrations. 
 */
void
write_most(void)
{
    list *l;
    definition *def;
    version_list *vp;

    for (l = defined; l != NULL; l = l->next) {
	def = (definition *) l->val;
	if (def->def_kind == DEF_PROGRAM) {
	    for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
		f_print(fout, "\nstatic void ");
		pvname(def->def_name, vp->vers_num);
		f_print(fout, "();");
	    }
	}
    }
    f_print(fout, "\n\n");
    f_print(fout, "main()\n");
    f_print(fout, "{\n");
    f_print(fout, "\tSVCXPRT *%s;\n", TRANSP);
    f_print(fout, "\n");
    for (l = defined; l != NULL; l = l->next) {
	def = (definition *) l->val;
	if (def->def_kind != DEF_PROGRAM) {
	    continue;
	}
	for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
	    f_print(fout, "\tpmap_unset(%s, %s);\n", def->def_name,
		    vp->vers_name);
	}
    }
}


/*
 * write a registration for the given transport 
 */
void
write_register(char *transp)
{
    list *l;
    definition *def;
    version_list *vp;

    f_print(fout, "\n");
    f_print(fout, "\t%s = svc%s_create(RPC_ANYSOCK", TRANSP, transp);
    if (streq(transp, "tcp")) {
	f_print(fout, ", 0, 0");
    }
    f_print(fout, ");\n");
    f_print(fout, "\tif (%s == NULL) {\n", TRANSP);
    f_print(fout, "\t\tfprintf(stderr, \"cannot create %s service.\\n\");\n",
	    transp);
    f_print(fout, "\t\texit(1);\n");
    f_print(fout, "\t}\n");

    for (l = defined; l != NULL; l = l->next) {
	def = (definition *) l->val;
	if (def->def_kind != DEF_PROGRAM) {
	    continue;
	}
	for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
	    f_print(fout, "\tif (!svc_register(%s, %s, %s, ", TRANSP,
		    def->def_name, vp->vers_name);
	    pvname(def->def_name, vp->vers_num);
	    f_print(fout, ", IPPROTO_%s)) {\n",
		    streq(transp, "udp") ? "UDP" : "TCP");
	    f_print(fout,
		    "\t\tfprintf(stderr, \"unable to register (%s, %s, %s).\\n\");\n",
		    def->def_name, vp->vers_name, transp);
	    f_print(fout, "\t\texit(1);\n");
	    f_print(fout, "\t}\n");
	}
    }
}


/*
 * write the rest of the service 
 */
void
write_rest(void)
{
    f_print(fout, "\tsvc_run();\n");
    f_print(fout, "\tfprintf(stderr, \"svc_run returned\\n\");\n");
    f_print(fout, "\texit(1);\n");
    f_print(fout, "}\n");
}

void
write_programs(char *storage)
{
    list *l;
    definition *def;

    for (l = defined; l != NULL; l = l->next) {
	def = (definition *) l->val;
	if (def->def_kind == DEF_PROGRAM) {
	    write_program(def, storage);
	}
    }
}


static void
write_program(definition * def, char *storage)
{
    version_list *vp;
    proc_list *proc;
    int filled;

    for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
	f_print(fout, "\n");
	if (storage != NULL) {
	    f_print(fout, "%s ", storage);
	}
	f_print(fout, "void\n");
	pvname(def->def_name, vp->vers_num);
	f_print(fout, "(%s, %s)\n", RQSTP, TRANSP);
	f_print(fout, "	struct svc_req *%s;\n", RQSTP);
	f_print(fout, "	SVCXPRT *%s;\n", TRANSP);
	f_print(fout, "{\n");

	filled = 0;
	f_print(fout, "\tunion {\n");
	for (proc = vp->procs; proc != NULL; proc = proc->next) {
	    if (streq(proc->arg_type, "void")) {
		continue;
	    }
	    filled = 1;
	    f_print(fout, "\t\t");
	    ptype(proc->arg_prefix, proc->arg_type, 0);
	    pvname(proc->proc_name, vp->vers_num);
	    f_print(fout, "_arg;\n");
	}
	if (!filled) {
	    f_print(fout, "\t\tint fill;\n");
	}
	f_print(fout, "\t} %s;\n", ARG);
	f_print(fout, "\tchar *%s;\n", RESULT);
	f_print(fout, "\tbool_t (*xdr_%s)(), (*xdr_%s)();\n", ARG, RESULT);
	f_print(fout, "\tchar *(*%s)();\n", ROUTINE);
	f_print(fout, "\n");
	f_print(fout, "\tswitch (%s->rq_proc) {\n", RQSTP);

	if (!nullproc(vp->procs)) {
	    f_print(fout, "\tcase NULLPROC:\n");
	    f_print(fout, "\t\tsvc_sendreply(%s, xdr_void, NULL);\n", TRANSP);
	    f_print(fout, "\t\treturn;\n\n");
	}
	for (proc = vp->procs; proc != NULL; proc = proc->next) {
	    f_print(fout, "\tcase %s:\n", proc->proc_name);
	    f_print(fout, "\t\txdr_%s = xdr_%s;\n", ARG,
		    stringfix(proc->arg_type));
	    f_print(fout, "\t\txdr_%s = xdr_%s;\n", RESULT,
		    stringfix(proc->res_type));
	    f_print(fout, "\t\t%s = (char *(*)()) ", ROUTINE);
	    pvname(proc->proc_name, vp->vers_num);
	    f_print(fout, ";\n");
	    f_print(fout, "\t\tbreak;\n\n");
	}
	f_print(fout, "\tdefault:\n");
	printerr("noproc", TRANSP);
	f_print(fout, "\t\treturn;\n");
	f_print(fout, "\t}\n");

	f_print(fout, "\tmemset(&%s, 0, sizeof(%s));\n", ARG, ARG);
	printif("getargs", TRANSP, "&", ARG);
	printerr("decode", TRANSP);
	f_print(fout, "\t\treturn;\n");
	f_print(fout, "\t}\n");

	f_print(fout, "\t%s = (*%s)(&%s, %s);\n", RESULT, ROUTINE, ARG,
		RQSTP);
	f_print(fout,
		"\tif (%s != NULL && !svc_sendreply(%s, xdr_%s, %s)) {\n",
		RESULT, TRANSP, RESULT, RESULT);
	printerr("systemerr", TRANSP);
	f_print(fout, "\t}\n");

	printif("freeargs", TRANSP, "&", ARG);
	f_print(fout,
		"\t\tfprintf(stderr, \"unable to free arguments\\n\");\n");
	f_print(fout, "\t\texit(1);\n");
	f_print(fout, "\t}\n");

	f_print(fout, "}\n\n");
    }
}

static void
printerr(char *err, char *transp)
{
    f_print(fout, "\t\tsvcerr_%s(%s);\n", err, transp);
}

static void
printif(char *proc, char *transp, char *prefix, char *arg)
{
    f_print(fout, "\tif (!svc_%s(%s, xdr_%s, %s%s)) {\n", proc, transp, arg,
	    prefix, arg);
}


int
nullproc(proc_list * proc)
{
    for (; proc != NULL; proc = proc->next) {
	if (streq(proc->proc_num, "0")) {
	    return (1);
	}
    }
    return (0);
}