/*
 * 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_clntout.c, Client-stub outputter for the RPC protocol compiler
 * Copyright (C) 1987, Sun Microsytsems, Inc.
 */
#include <stdio.h>
#include <string.h>
#include <rpc/types.h>
#include "rpc_parse.h"
#include "rpc_scan.h"
#include "rpc_util.h"

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, const char *result, const char *addargname,
    const char *addargtype)
{

        decl_list *l;

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

                if (mtflag) {/* Generate result field */
                        f_print(fout, "*argp, ");
                        ptype(proc->res_prefix, proc->res_type, 1);
                        f_print(fout, "*%s, %s%s)\n",
                                result, addargtype, addargname);
                } else
                        f_print(fout, "*argp, %s%s)\n", addargtype, addargname);
        } else if (streq(proc->args.decls->decl.type, "void")) {
                /* newstyle, 0 argument */
                if (mtflag) {
                        f_print(fout, "(");
                        ptype(proc->res_prefix, proc->res_type, 1);
                        f_print(fout, "*%s, %s%s)\n",
                                result, addargtype, addargname);
                } else
                        f_print(fout, "(%s%s)\n", addargtype, addargname);
        } else {
                /* new style, 1 or multiple arguments */
                f_print(fout, "(");
                for (l = proc->args.decls; l != NULL; l = l->next) {
                        pdeclaration(proc->args.argname, &l->decl, 0, ", ");
                }
                if (mtflag) {
                        ptype(proc->res_prefix, proc->res_type, 1);
                        f_print(fout, "*%s, ", result);

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



static const char *
ampr(const 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);

        /*
         * 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 (!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, "\tmemset((char *)%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,
                        "(caddr_t) 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);
                }
        }
}