/*
 * 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_hout.c, Header file outputter for the RPC protocol compiler
 */
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include "rpc_parse.h"
#include "rpc_util.h"

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

static void storexdrfuncdecl(char *, int);
static void pconstdef(definition *);
static void pstructdef(definition *);
static void puniondef(definition *);
static void pdefine(char *, char *);
static void pprogramdef(definition *);
static void parglist(proc_list *, char *);
static void penumdef(definition *);
static void ptypedef(definition *);
static uint_t undefined2(char *, char *);

enum rpc_gvc {
        PROGRAM,
        VERSION,
        PROCEDURE
};

/*
 * Print the C-version of an xdr definition
 */
void
print_datadef(definition *def)
{
        if (def->def_kind == DEF_PROGRAM)  /* handle data only */
                return;

        if (def->def_kind != DEF_CONST)
                f_print(fout, "\n");
        switch (def->def_kind) {
        case DEF_STRUCT:
                pstructdef(def);
                break;
        case DEF_UNION:
                puniondef(def);
                break;
        case DEF_ENUM:
                penumdef(def);
                break;
        case DEF_TYPEDEF:
                ptypedef(def);
                break;
        case DEF_PROGRAM:
                pprogramdef(def);
                break;
        case DEF_CONST:
                pconstdef(def);
                break;
        }
        if (def->def_kind != DEF_PROGRAM && def->def_kind != DEF_CONST)
                storexdrfuncdecl(def->def_name, def->def_kind != DEF_TYPEDEF ||
                    !isvectordef(def->def.ty.old_type, def->def.ty.rel));
}


void
print_funcdef(definition *def)
{
        switch (def->def_kind) {
        case DEF_PROGRAM:
                f_print(fout, "\n");
                pprogramdef(def);
                break;
        }
}

/*
 * store away enough information to allow the XDR functions to be spat
 * out at the end of the file
 */
static void
storexdrfuncdecl(char *name, int pointerp)
{
        xdrfunc *xdrptr;

        xdrptr = malloc(sizeof (struct xdrfunc));

        xdrptr->name = name;
        xdrptr->pointerp = pointerp;
        xdrptr->next = NULL;

        if (xdrfunc_tail == NULL) {
                xdrfunc_head = xdrptr;
                xdrfunc_tail = xdrptr;
        } else {
                xdrfunc_tail->next = xdrptr;
                xdrfunc_tail = xdrptr;
        }


}

void
print_xdr_func_def(char *name, int pointerp, int i)
{
        if (i == 2)
                f_print(fout, "extern bool_t xdr_%s();\n", name);
        else
                f_print(fout, "extern  bool_t xdr_%s(XDR *, %s%s);\n", name,
                    name, pointerp ? "*" : "");
}


static void
pconstdef(definition *def)
{
        pdefine(def->def_name, def->def.co);
}

/*
 * print out the definitions for the arguments of functions in the
 * header file
 */
static void
pargdef(definition *def)
{
        decl_list *l;
        version_list *vers;
        char *name;
        proc_list *plist;

        for (vers = def->def.pr.versions; vers != NULL; vers = vers->next) {
                for (plist = vers->procs; plist != NULL; plist = plist->next) {
                        if (!newstyle || plist->arg_num < 2)
                                continue; /* old style or single args */
                        name = plist->args.argname;
                        f_print(fout, "struct %s {\n", name);
                        for (l = plist->args.decls; l != NULL; l = l->next)
                                pdeclaration(name, &l->decl, 1, ";\n");
                        f_print(fout, "};\n");
                        f_print(fout, "typedef struct %s %s;\n", name, name);
                        storexdrfuncdecl(name, 1);
                        f_print(fout, "\n");
                }
        }
}


static void
pstructdef(definition *def)
{
        decl_list *l;
        char *name = def->def_name;

        f_print(fout, "struct %s {\n", name);
        for (l = def->def.st.decls; l != NULL; l = l->next)
                pdeclaration(name, &l->decl, 1, ";\n");
        f_print(fout, "};\n");
        f_print(fout, "typedef struct %s %s;\n", name, name);
}

static void
puniondef(definition *def)
{
        case_list *l;
        char *name = def->def_name;
        declaration *decl;

        f_print(fout, "struct %s {\n", name);
        decl = &def->def.un.enum_decl;
        if (streq(decl->type, "bool"))
                f_print(fout, "\tbool_t %s;\n", decl->name);
        else
                f_print(fout, "\t%s %s;\n", decl->type, decl->name);
        f_print(fout, "\tunion {\n");
        for (l = def->def.un.cases; l != NULL; l = l->next) {
                if (l->contflag == 0)
                        pdeclaration(name, &l->case_decl, 2, ";\n");
        }
        decl = def->def.un.default_decl;
        if (decl && !streq(decl->type, "void"))
                pdeclaration(name, decl, 2, ";\n");
        f_print(fout, "\t} %s_u;\n", name);
        f_print(fout, "};\n");
        f_print(fout, "typedef struct %s %s;\n", name, name);
}

static void
pdefine(char *name, char *num)
{
        f_print(fout, "#define\t%s %s\n", name, num);
}

static void
puldefine(char *name, char *num, enum rpc_gvc which)
{
        switch (which) {
        case PROGRAM:
        case VERSION:
        case PROCEDURE:
                f_print(fout, "#define\t%s\t%s\n", name, num);
                break;
        default:
                break;
        }
}

static uint_t
define_printed(proc_list *stop, version_list *start)
{
        version_list *vers;
        proc_list *proc;

        for (vers = start; vers != NULL; vers = vers->next) {
                for (proc = vers->procs; proc != NULL; proc = proc->next) {
                        if (proc == stop)
                                return (0);
                        if (streq(proc->proc_name, stop->proc_name))
                                return (1);
                }
        }
        abort();
        /* NOTREACHED */
}

static void
pfreeprocdef(char *name, char *vers, int mode)
{
        f_print(fout, "extern int ");
        pvname(name, vers);
        if (mode == 1)
                f_print(fout, "_freeresult(SVCXPRT *, xdrproc_t, caddr_t);\n");
        else
                f_print(fout, "_freeresult();\n");
}

static void
pprogramdef(definition *def)
{
        version_list *vers;
        proc_list *proc;
        int i;
        char *ext;

        pargdef(def);

        puldefine(def->def_name, def->def.pr.prog_num, PROGRAM);
        for (vers = def->def.pr.versions; vers != NULL; vers = vers->next) {
                if (tblflag) {
                        f_print(fout,
                            "extern struct rpcgen_table %s_%s_table[];\n",
                            locase(def->def_name), vers->vers_num);
                        f_print(fout,
                            "extern int %s_%s_nproc;\n",
                            locase(def->def_name), vers->vers_num);
                }
                puldefine(vers->vers_name, vers->vers_num, VERSION);

                /*
                 * Print out 2 definitions, one for ANSI-C, another for
                 * old K & R C
                 */

                if (!Cflag) {
                        ext = "extern  ";
                        for (proc = vers->procs; proc != NULL;
                            proc = proc->next) {
                                if (!define_printed(proc, def->def.pr.versions))
                                        puldefine(proc->proc_name,
                                            proc->proc_num, PROCEDURE);
                                f_print(fout, "%s", ext);
                                pprocdef(proc, vers, NULL, 0, 2);

                                if (mtflag) {
                                        f_print(fout, "%s", ext);
                                        pprocdef(proc, vers, NULL, 1, 2);
                                }
                        }
                        pfreeprocdef(def->def_name, vers->vers_num, 2);
                } else {
                        for (i = 1; i < 3; i++) {
                                if (i == 1) {
                                        f_print(fout, "\n#if defined(__STDC__)"
                                            " || defined(__cplusplus)\n");
                                        ext = "extern  ";
                                } else {
                                        f_print(fout, "\n#else /* K&R C */\n");
                                        ext = "extern  ";
                                }

                                for (proc = vers->procs; proc != NULL;
                                    proc = proc->next) {
                                        if (!define_printed(proc,
                                            def->def.pr.versions)) {
                                                puldefine(proc->proc_name,
                                                    proc->proc_num, PROCEDURE);
                                        }
                                        f_print(fout, "%s", ext);
                                        pprocdef(proc, vers, "CLIENT *", 0, i);
                                        f_print(fout, "%s", ext);
                                        pprocdef(proc, vers,
                                            "struct svc_req *", 1, i);
                                }
                                pfreeprocdef(def->def_name, vers->vers_num, i);
                        }
                        f_print(fout, "#endif /* K&R C */\n");
                }
        }
}

void
pprocdef(proc_list *proc, version_list *vp, char *addargtype, int server_p,
                                                                int mode)
{
        if (mtflag) {
                /* Print MT style stubs */
                if (server_p)
                        f_print(fout, "bool_t ");
                else
                        f_print(fout, "enum clnt_stat ");
        } else {
                ptype(proc->res_prefix, proc->res_type, 1);
                f_print(fout, "* ");
        }
        if (server_p)
                pvname_svc(proc->proc_name, vp->vers_num);
        else
                pvname(proc->proc_name, vp->vers_num);

        /*
         *  mode  1 = ANSI-C, mode 2 = K&R C
         */
        if (mode == 1)
                parglist(proc, addargtype);
        else
                f_print(fout, "();\n");
}

/* print out argument list of procedure */
static void
parglist(proc_list *proc, char *addargtype)
{
        decl_list *dl;
        int oneway = streq(proc->res_type, "oneway");

        f_print(fout, "(");
        if (proc->arg_num < 2 && newstyle &&
            streq(proc->args.decls->decl.type, "void")) {
                /* 0 argument in new style:  do nothing */
                /* EMPTY */
        } else {
                for (dl = proc->args.decls; dl != NULL; dl = dl->next) {
                        ptype(dl->decl.prefix, dl->decl.type, 1);
                        if (!newstyle || (dl->decl.rel == REL_POINTER))
                                f_print(fout, "*");
                        /* old style passes by reference */
                        f_print(fout, ", ");
                }
        }

        if (mtflag && !oneway)  {
                ptype(proc->res_prefix, proc->res_type, 1);
                f_print(fout, "*, ");
        }

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

static void
penumdef(definition *def)
{
        char *name = def->def_name;
        enumval_list *l;
        char *last = NULL;
        int count = 0;

        f_print(fout, "enum %s {\n", name);
        for (l = def->def.en.vals; l != NULL; l = l->next) {
                f_print(fout, "\t%s", l->name);
                if (l->assignment) {
                        f_print(fout, " = %s", l->assignment);
                        last = l->assignment;
                        count = 1;
                } else {
                        if (last == NULL)
                                f_print(fout, " = %d", count++);
                        else
                                f_print(fout, " = %s + %d", last, count++);
                }
                if (l->next)
                        f_print(fout, ",\n");
                else
                        f_print(fout, "\n");
        }
        f_print(fout, "};\n");
        f_print(fout, "typedef enum %s %s;\n", name, name);
}

static void
ptypedef(definition *def)
{
        char *name = def->def_name;
        char *old = def->def.ty.old_type;
        char prefix[8]; /* enough to contain "struct ", including NUL */
        relation rel = def->def.ty.rel;


        if (!streq(name, old)) {
                if (streq(old, "string")) {
                        old = "char";
                        rel = REL_POINTER;
                } else if (streq(old, "opaque")) {
                        old = "char";
                } else if (streq(old, "bool")) {
                        old = "bool_t";
                }
                if (undefined2(old, name) && def->def.ty.old_prefix)
                        (void) snprintf(prefix, sizeof (prefix), "%s ",
                            def->def.ty.old_prefix);
                else
                        prefix[0] = 0;
                f_print(fout, "typedef ");
                switch (rel) {
                case REL_ARRAY:
                        f_print(fout, "struct {\n");
                        f_print(fout, "\tu_int %s_len;\n", name);
                        f_print(fout, "\t%s%s *%s_val;\n", prefix, old, name);
                        f_print(fout, "} %s", name);
                        break;
                case REL_POINTER:
                        f_print(fout, "%s%s *%s", prefix, old, name);
                        break;
                case REL_VECTOR:
                        f_print(fout, "%s%s %s[%s]", prefix, old, name,
                            def->def.ty.array_max);
                        break;
                case REL_ALIAS:
                        f_print(fout, "%s%s %s", prefix, old, name);
                        break;
                }
                f_print(fout, ";\n");
        }
}

void
pdeclaration(char *name, declaration *dec, int tab, char *separator)
{
        char buf[8];    /* enough to hold "struct ", include NUL */
        char *prefix;
        char *type;

        if (streq(dec->type, "void"))
                return;
        tabify(fout, tab);
        if (streq(dec->type, name) && !dec->prefix)
                f_print(fout, "struct ");
        if (streq(dec->type, "string")) {
                f_print(fout, "char *%s", dec->name);
        } else {
                prefix = "";
                if (streq(dec->type, "bool")) {
                        type = "bool_t";
                } else if (streq(dec->type, "opaque")) {
                        type = "char";
                } else {
                        if (dec->prefix) {
                                (void) snprintf(buf, sizeof (buf),
                                    "%s ", dec->prefix);
                                prefix = buf;
                        }
                        type = dec->type;
                }
                switch (dec->rel) {
                case REL_ALIAS:
                        f_print(fout, "%s%s %s", prefix, type, dec->name);
                        break;
                case REL_VECTOR:
                        f_print(fout, "%s%s %s[%s]", prefix, type, dec->name,
                            dec->array_max);
                        break;
                case REL_POINTER:
                        f_print(fout, "%s%s *%s", prefix, type, dec->name);
                        break;
                case REL_ARRAY:
                        f_print(fout, "struct {\n");
                        tabify(fout, tab);
                        f_print(fout, "\tu_int %s_len;\n", dec->name);
                        tabify(fout, tab);
                        f_print(fout,
                            "\t%s%s *%s_val;\n", prefix, type, dec->name);
                        tabify(fout, tab);
                        f_print(fout, "} %s", dec->name);
                        break;
                }
        }
        /* LINTED variable format */
        f_print(fout, separator);
}

static uint_t
undefined2(char *type, char *stop)
{
        list *l;
        definition *def;

        for (l = defined; l != NULL; l = l->next) {
                def = (definition *) l->val;
                if (def->def_kind != DEF_PROGRAM) {
                        if (streq(def->def_name, stop))
                                return (1);
                        if (streq(def->def_name, type))
                                return (0);
                }
        }
        return (1);
}