/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

/*
 * rpc_sample.c, Sample client-server code outputter
 * for the RPC protocol compiler
 */

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


static char RQSTP[] = "rqstp";

extern void printarglist(proc_list *, char *, char *, char *);

static void write_sample_client(char *, version_list *);
static void write_sample_server(definition *);
static void return_type(proc_list *);

void
write_sample_svc(definition *def)
{
        if (def->def_kind != DEF_PROGRAM)
                return;
        write_sample_server(def);
}

int
write_sample_clnt(definition *def)
{
        version_list *vp;
        int count = 0;

        if (def->def_kind != DEF_PROGRAM)
                return (0);
        /* generate sample code for each version */
        for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
                write_sample_client(def->def_name, vp);
                ++count;
        }
        return (count);
}

static void
write_sample_client(char *program_name, version_list *vp)
{
        proc_list *proc;
        int i;
        decl_list *l;

        f_print(fout, "\n\nvoid\n");
        pvname(program_name, vp->vers_num);
        if (Cflag)
                f_print(fout, "(char *host)\n{\n");
        else
                f_print(fout, "(host)\n\tchar *host;\n{\n");
        f_print(fout, "\tCLIENT *clnt;\n");

        i = 0;
        for (proc = vp->procs; proc != NULL; proc = proc->next) {
                f_print(fout, "\t");
                if (mtflag) {
                        f_print(fout, "enum clnt_stat retval_%d;\n", ++i);
                        if (!streq(proc->res_type, "oneway")) {
                                f_print(fout, "\t");
                                if (!streq(proc->res_type, "void"))
                                        ptype(proc->res_prefix,
                                            proc->res_type, 1);
                                else
                                        f_print(fout, "void *");
                                f_print(fout, "result_%d;\n", i);
                        }
                } else {
                        ptype(proc->res_prefix, proc->res_type, 1);
                        f_print(fout, " *result_%d;\n", ++i);
                }
                /* print out declarations for arguments */
                if (proc->arg_num < 2 && !newstyle) {
                        f_print(fout, "\t");
                        if (!streq(proc->args.decls->decl.type, "void"))
                                ptype(proc->args.decls->decl.prefix,
                                    proc->args.decls->decl.type, 1);
                        else
                                /* cannot have "void" type */
                                f_print(fout, "char * ");
                        f_print(fout, " ");
                        pvname(proc->proc_name, vp->vers_num);
                        f_print(fout, "_arg;\n");
                } else if (!streq(proc->args.decls->decl.type, "void")) {
                        for (l = proc->args.decls; l != NULL; l = l->next) {
                                f_print(fout, "\t");
                                ptype(l->decl.prefix, l->decl.type, 1);
                                if (strcmp(l->decl.type, "string") == 1)
                                        f_print(fout, " ");
                                pvname(proc->proc_name, vp->vers_num);
                                f_print(fout, "_%s;\n", l->decl.name);
                        }
                }
        }

        /* generate creation of client handle */
        f_print(fout, "\n#ifndef\tDEBUG\n");
        f_print(fout, "\tclnt = clnt_create(host, %s, %s, \"%s\");\n",
            program_name, vp->vers_name, tirpcflag? "netpath" : "udp");
        f_print(fout, "\tif (clnt == (CLIENT *) NULL) {\n");
        f_print(fout, "\t\tclnt_pcreateerror(host);\n");
        f_print(fout, "\t\texit(1);\n\t}\n");
        f_print(fout, "#endif\t/* DEBUG */\n\n");

        /* generate calls to procedures */
        i = 0;
        for (proc = vp->procs; proc != NULL; proc = proc->next) {
                if (mtflag)
                        f_print(fout, "\tretval_%d = ", ++i);
                else
                        f_print(fout, "\tresult_%d = ", ++i);
                pvname(proc->proc_name, vp->vers_num);
                if (proc->arg_num < 2 && !newstyle) {
                        f_print(fout, "(");
                        if (streq(proc->args.decls->decl.type, "void"))
                                /* cast to void * */
                                f_print(fout, "(void *)");
                        f_print(fout, "&");
                        pvname(proc->proc_name, vp->vers_num);
                        if (mtflag) {
                                if (streq(proc->res_type, "oneway"))
                                        f_print(fout, "_arg, clnt);\n");
                                else
                                        f_print(fout,
                                            "_arg, &result_%d, clnt);\n", i);
                        } else
                                f_print(fout, "_arg, clnt);\n");

                } else if (streq(proc->args.decls->decl.type, "void")) {
                        if (mtflag) {
                                if (streq(proc->res_type, "oneway"))
                                        f_print(fout, "(clnt);\n");
                                else
                                        f_print(fout,
                                            "(&result_%d, clnt);\n", i);
                        } else
                                f_print(fout, "(clnt);\n");
                } else {
                        f_print(fout, "(");
                        for (l = proc->args.decls;  l != NULL; l = l->next) {
                                pvname(proc->proc_name, vp->vers_num);
                                f_print(fout, "_%s, ", l->decl.name);
                        }
                        if (mtflag) {
                                if (!streq(proc->res_type, "oneway"))
                                        f_print(fout, "&result_%d, ", i);
                        }

                        f_print(fout, "clnt);\n");
                }
                if (mtflag) {
                        f_print(fout, "\tif (retval_%d != RPC_SUCCESS) {\n", i);
                } else {
                        f_print(fout, "\tif (result_%d == (", i);
                        ptype(proc->res_prefix, proc->res_type, 1);
                        f_print(fout, "*) NULL) {\n");
                }
                f_print(fout, "\t\tclnt_perror(clnt, \"call failed\");\n");
                f_print(fout, "\t}\n");
        }

        f_print(fout, "#ifndef\tDEBUG\n");
        f_print(fout, "\tclnt_destroy(clnt);\n");
        f_print(fout, "#endif\t /* DEBUG */\n");
        f_print(fout, "}\n");
}

static void
write_sample_server(definition *def)
{
        version_list *vp;
        proc_list *proc;

        for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
                for (proc = vp->procs; proc != NULL; proc = proc->next) {
                        f_print(fout, "\n");
                        if (!mtflag) {
                                return_type(proc);
                                f_print(fout, "*\n");
                        } else {
                                f_print(fout, "bool_t\n");
                        }
                        if (Cflag || mtflag)
                                pvname_svc(proc->proc_name, vp->vers_num);
                        else
                                pvname(proc->proc_name, vp->vers_num);
                        printarglist(proc, "result", RQSTP, "struct svc_req *");

                        f_print(fout, "{\n");

                        if (!mtflag) {
                                f_print(fout, "\tstatic ");
                                if ((!streq(proc->res_type, "void")) &&
                                    (!streq(proc->res_type, "oneway")))
                                        return_type(proc);
                                else
                                        f_print(fout, "char *");
                                /* cannot have void type */
                                f_print(fout, " result;\n");
                        }

                        f_print(fout, "\n\t/*\n\t * insert server code "
                            "here\n\t */\n\n");

                        if (!mtflag)
                                if (!streq(proc->res_type, "void"))
                                        f_print(fout,
                                            "\treturn (&result);\n}\n");
                                else /* cast back to void * */
                                        f_print(fout, "\treturn((void *) "
                                            "&result);\n}\n");
                        else
                                f_print(fout, "\treturn (retval);\n}\n");
                }
                /* put in sample freeing routine */
                if (mtflag) {
                        f_print(fout, "\nint\n");
                        pvname(def->def_name, vp->vers_num);
                        if (Cflag)
                                f_print(fout, "_freeresult(SVCXPRT *transp,"
                                    " xdrproc_t xdr_result,"
                                    " caddr_t result)\n");
                        else {
                                f_print(fout, "_freeresult(transp, xdr_result,"
                                    " result)\n");
                                f_print(fout, "\tSVCXPRT *transp;\n");
                                f_print(fout, "\txdrproc_t xdr_result;\n");
                                f_print(fout, "\tcaddr_t result;\n");
                        }
                        f_print(fout, "{\n"
                            "\t(void) xdr_free(xdr_result, result);\n"
                            "\n\t/*\n\t * Insert additional freeing"
                            " code here, if needed\n\t */\n"
                            "\n\n\treturn (TRUE);\n}\n");
                }
        }
}

static void
return_type(proc_list *plist)
{
        ptype(plist->res_prefix, plist->res_type, 1);
}

void
add_sample_msg(void)
{
        f_print(fout, "/*\n");
        f_print(fout, " * This is sample code generated by rpcgen.\n");
        f_print(fout, " * These are only templates and you can use them\n");
        f_print(fout, " * as a guideline for developing your own functions.\n");
        f_print(fout, " */\n\n");
}

void
write_sample_clnt_main(void)
{
        list *l;
        definition *def;
        version_list *vp;

        f_print(fout, "\n\n");
        if (Cflag)
                f_print(fout, "int\nmain(int argc, char *argv[])\n{\n");
        else
                f_print(fout, "int\nmain(argc, argv)\n\tint argc;\n"
                    "\tchar *argv[];\n{\n");

        f_print(fout, "\tchar *host;");
        f_print(fout, "\n\n\tif (argc < 2) {");
        f_print(fout, "\n\t\tprintf(\"usage:  %%s server_host\\n\","
            " argv[0]);\n");
        f_print(fout, "\t\texit(1);\n\t}");
        f_print(fout, "\n\thost = argv[1];\n");

        for (l = defined; l != NULL; l = l->next) {
                def = l->val;
                if (def->def_kind != DEF_PROGRAM)
                        continue;
                for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
                        f_print(fout, "\t");
                        pvname(def->def_name, vp->vers_num);
                        f_print(fout, "(host);\n");
                }
        }
        f_print(fout, "}\n");
}