/*
 * 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_clntout.c, Client-stub outputter for the RPC protocol compiler
 */
#include <stdio.h>
#include <string.h>
#include <rpc/types.h>
#include "rpc_parse.h"
#include "rpc_util.h"

extern void pdeclaration(char *, declaration *, int, char *);
extern void printarglist(proc_list *, char *, char *, char *);

static void write_program(definition *);
static void printbody(proc_list *);

static char RESULT[] = "clnt_res";

#define DEFAULT_TIMEOUT 25      /* in seconds */

void
write_stubs(void)
{
        list *l;
        definition *def;

        f_print(fout,
            "\n/* Default timeout can be changed using clnt_control() */\n");
        f_print(fout, "static struct timeval TIMEOUT = { %d, 0 };\n",
            DEFAULT_TIMEOUT);
        for (l = defined; l != NULL; l = l->next) {
                def = (definition *) l->val;
                if (def->def_kind == DEF_PROGRAM) {
                        write_program(def);
                }
        }
}

static void
write_program(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 == 0) {
                                ptype(proc->res_prefix, proc->res_type, 1);
                                f_print(fout, "*\n");
                                pvname(proc->proc_name, vp->vers_num);
                                printarglist(proc, RESULT, "clnt", "CLIENT *");
                        } else {
                                f_print(fout, "enum clnt_stat \n");
                                pvname(proc->proc_name, vp->vers_num);
                                printarglist(proc, RESULT,  "clnt", "CLIENT *");

                        }
                        f_print(fout, "{\n");
                        printbody(proc);

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

/*
 * Writes out declarations of procedure's argument list.
 * In either ANSI C style, in one of old rpcgen style (pass by reference),
 * or new rpcgen style (multiple arguments, pass by value);
 */

/* sample addargname = "clnt"; sample addargtype = "CLIENT * " */

void
printarglist(proc_list *proc, char *result, char *addargname, char *addargtype)
{
        bool_t oneway = streq(proc->res_type, "oneway");
        decl_list *l;

        if (!newstyle) {
                /* old style: always pass argument by reference */
                if (Cflag) {    /* C++ style heading */
                        f_print(fout, "(");
                        ptype(proc->args.decls->decl.prefix,
                            proc->args.decls->decl.type, 1);

                        if (mtflag) {   /* Generate result field */
                                f_print(fout, "*argp, ");
                                if (!oneway) {
                                        ptype(proc->res_prefix,
                                            proc->res_type, 1);
                                        f_print(fout, "*%s, ", result);
                                }
                                f_print(fout, "%s%s)\n",
                                    addargtype, addargname);
                        } else
                                f_print(fout, "*argp, %s%s)\n",
                                    addargtype, addargname);
                } else {
                        if (!mtflag)
                                f_print(fout, "(argp, %s)\n", addargname);
                        else {
                                f_print(fout, "(argp, ");
                                if (!oneway) {
                                        f_print(fout, "%s, ",
                                            result);
                                }
                                f_print(fout, "%s)\n",
                                    addargname);
                        }
                        f_print(fout, "\t");
                        ptype(proc->args.decls->decl.prefix,
                            proc->args.decls->decl.type, 1);
                        f_print(fout, "*argp;\n");
                        if (mtflag && !oneway) {
                                f_print(fout, "\t");
                                ptype(proc->res_prefix, proc->res_type, 1);
                                f_print(fout, "*%s;\n", result);
                        }
                }
        } else if (streq(proc->args.decls->decl.type, "void")) {
                /* newstyle, 0 argument */
                if (mtflag) {
                        f_print(fout, "(");

                        if (Cflag) {
                                if (!oneway) {
                                        ptype(proc->res_prefix,
                                            proc->res_type, 1);
                                        f_print(fout, "*%s, ", result);
                                }
                                f_print(fout, "%s%s)\n",
                                    addargtype, addargname);
                        } else
                                f_print(fout, "(%s)\n", addargname);

                } else
                if (Cflag)
                        f_print(fout, "(%s%s)\n", addargtype, addargname);
                else
                        f_print(fout, "(%s)\n", addargname);
        } else {
                /* new style, 1 or multiple arguments */
                if (!Cflag) {
                        f_print(fout, "(");
                        for (l = proc->args.decls;  l != NULL; l = l->next)
                                f_print(fout, "%s, ", l->decl.name);
                        if (mtflag && !oneway)
                                f_print(fout, "%s, ", result);

                        f_print(fout, "%s)\n", addargname);
                        for (l = proc->args.decls; l != NULL; l = l->next) {
                                pdeclaration(proc->args.argname,
                                    &l->decl, 1, ";\n");
                        }
                        if (mtflag && !oneway) {
                                f_print(fout, "\t");
                                ptype(proc->res_prefix, proc->res_type, 1);
                                f_print(fout, "*%s;\n", result);
                        }

                } else {        /* C++ style header */
                        f_print(fout, "(");
                        for (l = proc->args.decls; l != NULL; l = l->next) {
                                pdeclaration(proc->args.argname, &l->decl, 0,
                                    ", ");
                        }
                        if (mtflag && !oneway) {
                                ptype(proc->res_prefix, proc->res_type, 1);
                                f_print(fout, "*%s, ", result);

                        }
                        f_print(fout, "%s%s)\n", addargtype, addargname);
                }
        }

        if (!Cflag)
                f_print(fout, "\t%s%s;\n", addargtype, addargname);
}



static char *
ampr(char *type)
{
        if (isvectordef(type, REL_ALIAS)) {
                return ("");
        } else {
                return ("&");
        }
}

static void
printbody(proc_list *proc)
{
        decl_list *l;
        bool_t args2 = (proc->arg_num > 1);
        bool_t oneway = streq(proc->res_type, "oneway");

        /*
         * For new style with multiple arguments, need a structure in which
         *  to stuff the arguments.
         */
        if (newstyle && args2) {
                f_print(fout, "\t%s", proc->args.argname);
                f_print(fout, " arg;\n");
        }
        if (!oneway) {
                if (!mtflag) {
                        f_print(fout, "\tstatic ");
                        if (streq(proc->res_type, "void")) {
                                f_print(fout, "char ");
                        } else {
                                ptype(proc->res_prefix, proc->res_type, 0);
                        }
                        f_print(fout, "%s;\n", RESULT);
                        f_print(fout, "\n");
                        f_print(fout,
                            "\t(void) memset(%s%s, 0, sizeof (%s));\n",
                            ampr(proc->res_type), RESULT, RESULT);

                }
                if (newstyle && !args2 &&
                    (streq(proc->args.decls->decl.type, "void"))) {
                        /* newstyle, 0 arguments */

                        if (mtflag)
                                f_print(fout, "\t return ");
                        else
                                f_print(fout, "\t if ");

                        f_print(fout,
                            "(clnt_call(clnt, %s,\n\t\t(xdrproc_t)xdr_void, ",
                            proc->proc_name);
                        f_print(fout,
                            "NULL,\n\t\t(xdrproc_t)xdr_%s, "
                            "(caddr_t)%s%s,",
                            stringfix(proc->res_type),
                            (mtflag)?"":ampr(proc->res_type),
                            RESULT);

                        if (mtflag)
                                f_print(fout, "\n\t\tTIMEOUT));\n");
                        else
                                f_print(fout,
                                    "\n\t\tTIMEOUT) != RPC_SUCCESS) {\n");

                } else if (newstyle && args2) {
                        /*
                         * Newstyle, multiple arguments
                         * stuff arguments into structure
                         */
                        for (l = proc->args.decls;  l != NULL; l = l->next) {
                                f_print(fout, "\targ.%s = %s;\n",
                                    l->decl.name, l->decl.name);
                        }
                        if (mtflag)
                                f_print(fout, "\treturn ");
                        else
                                f_print(fout, "\tif ");
                        f_print(fout,
                            "(clnt_call(clnt, %s,\n\t\t(xdrproc_t)xdr_%s",
                            proc->proc_name, proc->args.argname);
                        f_print(fout,
                            ", (caddr_t)&arg,\n\t\t(xdrproc_t)xdr_%s, "
                            "(caddr_t)%s%s,",
                            stringfix(proc->res_type),
                            (mtflag)?"":ampr(proc->res_type),
                            RESULT);
                        if (mtflag)
                                f_print(fout, "\n\t\tTIMEOUT));\n");
                        else
                                f_print(fout,
                                    "\n\t\tTIMEOUT) != RPC_SUCCESS) {\n");
                } else {                /* single argument, new or old style */
                        if (!mtflag)
                                f_print(fout,
                                    "\tif (clnt_call(clnt, "
                                    "%s,\n\t\t(xdrproc_t)xdr_%s, "
                                    "(caddr_t)%s%s,\n\t\t(xdrproc_t)xdr_%s, "
                                    "(caddr_t)%s%s,\n\t\tTIMEOUT) != "
                                    "RPC_SUCCESS) {\n",
                                    proc->proc_name,
                                    stringfix(proc->args.decls->decl.type),
                                    (newstyle ? "&" : ""),
                                    (newstyle ?
                                    proc->args.decls->decl.name :
                                    "argp"),
                                    stringfix(proc->res_type),
                                    ampr(proc->res_type),
                                    RESULT);
                        else
                                f_print(fout,
                                    "\treturn (clnt_call(clnt, "
                                    "%s,\n\t\t(xdrproc_t)xdr_%s, "
                                    "(caddr_t)%s%s,\n\t\t(xdrproc_t)xdr_%s, "
                                    "(caddr_t)%s%s,\n\t\tTIMEOUT));\n",
                                    proc->proc_name,
                                    stringfix(proc->args.decls->decl.type),
                                    (newstyle ? "&" : ""),
                                    (newstyle ?
                                    proc->args.decls->decl.name :
                                    "argp"),
                                    stringfix(proc->res_type), "",
                                    RESULT);
                }
                if (!mtflag) {
                        f_print(fout, "\t\treturn (NULL);\n");
                        f_print(fout, "\t}\n");

                        if (streq(proc->res_type, "void")) {
                                f_print(fout, "\treturn ((void *)%s%s);\n",
                                    ampr(proc->res_type), RESULT);
                        } else {
                                f_print(fout, "\treturn (%s%s);\n",
                                    ampr(proc->res_type), RESULT);
                        }
                }
        } else {
                /* oneway call */
                if (!mtflag) {
                        f_print(fout, "\tstatic enum clnt_stat ");
                        f_print(fout, "%s;\n", RESULT);
                        f_print(fout, "\n");
                        f_print(fout,
                            "\t(void) memset(&%s, 0, sizeof (%s));\n",
                            RESULT, RESULT);

                }
                if (newstyle && !args2 &&
                    (streq(proc->args.decls->decl.type, "void"))) {
                        /* newstyle, 0 arguments */

                        if (mtflag)
                                f_print(fout, "\t return (");
                        else
                                f_print(fout, "\t if ((%s = ", RESULT);

                        f_print(fout,
                            "clnt_send(clnt, %s,\n\t\t(xdrproc_t)xdr_void, ",
                            proc->proc_name);
                        f_print(fout, "NULL)");

                        if (mtflag)
                                f_print(fout, ");\n");
                        else
                                f_print(fout, ") != RPC_SUCCESS) {\n");

                } else if (newstyle && args2) {
                        /*
                         * Newstyle, multiple arguments
                         * stuff arguments into structure
                         */
                        for (l = proc->args.decls;  l != NULL; l = l->next) {
                                f_print(fout, "\targ.%s = %s;\n",
                                    l->decl.name, l->decl.name);
                        }
                        if (mtflag)
                                f_print(fout, "\treturn (");
                        else
                                f_print(fout, "\tif ((%s =", RESULT);
                        f_print(fout,
                            "clnt_send(clnt, %s,\n\t\t(xdrproc_t)xdr_%s",
                            proc->proc_name, proc->args.argname);
                        f_print(fout,
                            ", (caddr_t)&arg)");
                        if (mtflag)
                                f_print(fout, ");\n");
                        else
                                f_print(fout, ") != RPC_SUCCESS) {\n");
                } else {                /* single argument, new or old style */
                        if (!mtflag)
                                f_print(fout,
                                    "\tif ((%s = clnt_send(clnt, "
                                    "%s,\n\t\t(xdrproc_t)xdr_%s, "
                                    "(caddr_t)%s%s)) != RPC_SUCCESS) {\n",
                                    RESULT,
                                    proc->proc_name,
                                    stringfix(proc->args.decls->decl.type),
                                    (newstyle ? "&" : ""),
                                    (newstyle ?
                                    proc->args.decls->decl.name :
                                    "argp"));
                        else

                                f_print(fout,
                                    "\treturn (clnt_send(clnt, "
                                    "%s,\n\t\t(xdrproc_t)xdr_%s, "
                                    "(caddr_t)%s%s));\n",
                                    proc->proc_name,
                                    stringfix(proc->args.decls->decl.type),
                                    (newstyle ? "&" : ""),
                                    (newstyle ?
                                    proc->args.decls->decl.name :
                                    "argp"));
                }
                if (!mtflag) {
                        f_print(fout, "\t\treturn (NULL);\n");
                        f_print(fout, "\t}\n");

                        f_print(fout, "\treturn ((void *)&%s);\n",
                            RESULT);
                }
        }
}