/*      $NetBSD: rpc_cout.c,v 1.39 2023/08/07 21:12:02 tnn Exp $        */
/*
 * 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 or with the express written consent of
 * Sun Microsystems, Inc.
 *
 * 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
 */

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(lint)
#if 0
static char sccsid[] = "@(#)rpc_cout.c 1.13 89/02/22 (C) 1987 SMI";
#else
__RCSID("$NetBSD: rpc_cout.c,v 1.39 2023/08/07 21:12:02 tnn Exp $");
#endif
#endif

/*
 * rpc_cout.c, XDR routine outputter for the RPC protocol compiler
 */
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rpc_scan.h"
#include "rpc_parse.h"
#include "rpc_util.h"

static int findtype(definition *, const char *);
static int undefined(const char *);
static void print_generic_header(const char *, int);
static void print_header(definition *);
static void print_prog_header(proc_list *);
static void print_trailer(void);
static void print_ifopen(int, const char *);
static void print_ifarg(const char *);
static void print_ifsizeof(const char *, const char *);
static void print_ifclose(int);
static void print_ifstat(int, const char *, const char *, relation,
    const char *, const char *, const char *);
static void emit_enum(definition *);
static void emit_program(definition *);
static void emit_union(definition *);
static void emit_struct(definition *);
static void emit_typedef(definition *);
static void print_stat(int, declaration *);

/*
 * Emit the C-routine for the given definition
 */
void
emit(definition *def)
{
        if (def->def_kind == DEF_CONST) {
                return;
        }
        if (def->def_kind == DEF_PROGRAM) {
                emit_program(def);
                return;
        }
        if (def->def_kind == DEF_TYPEDEF) {
                /* now we need to handle declarations like struct typedef foo
                 * foo; since we dont want this to be expanded into 2 calls to
                 * xdr_foo */

                if (strcmp(def->def.ty.old_type, def->def_name) == 0)
                        return;
        };

        print_header(def);

        switch (def->def_kind) {
        case DEF_UNION:
                emit_union(def);
                break;
        case DEF_ENUM:
                emit_enum(def);
                break;
        case DEF_STRUCT:
                emit_struct(def);
                break;
        case DEF_TYPEDEF:
                emit_typedef(def);
                break;
        case DEF_PROGRAM:
        case DEF_CONST:
                errx(1, "Internal error at %s:%d: Case %d not handled",
                    __FILE__, __LINE__, def->def_kind);
                break;
        }
        print_trailer();
}

static int
findtype(definition *def, const char *type)
{

        if (def->def_kind == DEF_PROGRAM || def->def_kind == DEF_CONST) {
                return (0);
        } else {
                return (streq(def->def_name, type));
        }
}

static int
undefined(const char *type)
{
        definition *def;

        def = (definition *) FINDVAL(defined, type, findtype);


        return (def == NULL);
}

static void
print_generic_header(const char *procname, int pointerp)
{
        f_print(fout, "\n");
        f_print(fout, "bool_t\n");
        f_print(fout, "xdr_%s(", procname);
        f_print(fout, "XDR *xdrs, ");
        f_print(fout, "%s ", procname);
        if (pointerp)
                f_print(fout, "*");
        f_print(fout, "objp)\n{\n");
}

static void
print_header(definition *def)
{
        print_generic_header(def->def_name,
            def->def_kind != DEF_TYPEDEF ||
            !isvectordef(def->def.ty.old_type, def->def.ty.rel));
}

static void
print_prog_header(proc_list *plist)
{
        print_generic_header(plist->args.argname, 1);
}

static void
print_trailer(void)
{
        f_print(fout, "\treturn (TRUE);\n");
        f_print(fout, "}\n");
}


static void
print_ifopen(int indent, const char *name)
{
        char _t_kludge[32];
        /*
         * XXX Solaris seems to strip the _t. No idea why.
         */
        if (!strcmp(name, "rpcprog_t") || !strcmp(name, "rpcvers_t") ||
            !strcmp(name, "rpcproc_t") || !strcmp(name, "rpcprot_t") ||
            !strcmp(name, "rpcport_t") || !strcmp(name, "rpcpinline_t")) {
                strlcpy(_t_kludge, name, sizeof(_t_kludge));
                char *underscore = strchr(_t_kludge, '_');
                *underscore = 0;
                name = _t_kludge;
        }
        tabify(fout, indent);
        f_print(fout, "if (!xdr_%s(xdrs", name);
}

static void
print_ifarg(const char *arg)
{
        f_print(fout, ", %s", arg);
}

static void
print_ifsizeof(const char *prefix, const char *type)
{
        if (streq(type, "bool")) {
                f_print(fout, ", (unsigned int)sizeof(bool_t), (xdrproc_t)xdr_bool");
        } else {
                f_print(fout, ", (unsigned int)sizeof(");
                if (undefined(type) && prefix) {
                        f_print(fout, "%s ", prefix);
                }
                f_print(fout, "%s), (xdrproc_t)xdr_%s", type, type);
        }
}

static void
print_ifclose(int indent)
{
        f_print(fout, "))\n");
        tabify(fout, indent);
        f_print(fout, "\treturn (FALSE);\n");
}

static void
print_ifstat(int indent, const char *prefix, const char *type, relation rel,
             const char *amax, const char *objname, const char *name)
{
        const char *alt = NULL;

        switch (rel) {
        case REL_POINTER:
                print_ifopen(indent, "pointer");
                print_ifarg("(char **)(void *)");
                f_print(fout, "%s", objname);
                print_ifsizeof(prefix, type);
                break;
        case REL_VECTOR:
                if (streq(type, "string")) {
                        alt = "string";
                } else
                        if (streq(type, "opaque")) {
                                alt = "opaque";
                        }
                if (alt) {
                        print_ifopen(indent, alt);
                        print_ifarg(objname);
                } else {
                        print_ifopen(indent, "vector");
                        print_ifarg("(char *)(void *)");
                        f_print(fout, "%s", objname);
                }
                print_ifarg(amax);
                if (!alt) {
                        print_ifsizeof(prefix, type);
                }
                break;
        case REL_ARRAY:
                if (streq(type, "string")) {
                        alt = "string";
                } else
                        if (streq(type, "opaque")) {
                                alt = "bytes";
                        }
                if (streq(type, "string")) {
                        print_ifopen(indent, alt);
                        print_ifarg(objname);
                } else {
                        if (alt) {
                                print_ifopen(indent, alt);
                        } else {
                                print_ifopen(indent, "array");
                        }
                        print_ifarg("(char **)(void *)");
                        if (*objname == '&') {
                                f_print(fout, "%s.%s_val, (unsigned int *)%s.%s_len",
                                    objname, name, objname, name);
                        } else {
                                f_print(fout, "&%s->%s_val, (unsigned int *)&%s->%s_len",
                                    objname, name, objname, name);
                        }
                }
                print_ifarg(amax);
                if (!alt) {
                        print_ifsizeof(prefix, type);
                }
                break;
        case REL_ALIAS:
                print_ifopen(indent, type);
                print_ifarg(objname);
                break;
        }
        print_ifclose(indent);
}
/* ARGSUSED */
static void
emit_enum(definition *def)
{
        tabify(fout, 1);
        f_print(fout, "{\n");
        tabify(fout, 2);
        f_print(fout, "enum_t et = (enum_t)*objp;\n");
        print_ifopen(2, "enum");
        print_ifarg("&et");
        print_ifclose(2);
        tabify(fout, 2);
        f_print(fout, "*objp = (%s)et;\n", def->def_name);
        tabify(fout, 1);
        f_print(fout, "}\n");
}

static void
emit_program(definition *def)
{
        decl_list *dl;
        version_list *vlist;
        proc_list *plist;

        for (vlist = def->def.pr.versions; vlist != NULL; vlist = vlist->next)
                for (plist = vlist->procs; plist != NULL; plist = plist->next) {
                        if (!newstyle || plist->arg_num < 2)
                                continue;       /* old style, or single
                                                 * argument */
                        print_prog_header(plist);
                        for (dl = plist->args.decls; dl != NULL;
                            dl = dl->next)
                                print_stat(1, &dl->decl);
                        print_trailer();
                }
}


static void
emit_union(definition *def)
{
        declaration *dflt;
        case_list *cl;
        declaration *cs;
        char   *object;
        static const char vecformat[] = "objp->%s_u.%s";
        static const char format[] = "&objp->%s_u.%s";

        f_print(fout, "\n");
        print_stat(1, &def->def.un.enum_decl);
        f_print(fout, "\tswitch (objp->%s) {\n", def->def.un.enum_decl.name);
        for (cl = def->def.un.cases; cl != NULL; cl = cl->next) {
                f_print(fout, "\tcase %s:\n", cl->case_name);
                if (cl->contflag == 1)  /* a continued case statement */
                        continue;
                cs = &cl->case_decl;
                if (!streq(cs->type, "void")) {
                        object = alloc(strlen(def->def_name) + strlen(format) +
                            strlen(cs->name) + 1);
                        if (isvectordef(cs->type, cs->rel)) {
                                s_print(object, vecformat, def->def_name,
                                    cs->name);
                        } else {
                                s_print(object, format, def->def_name,
                                    cs->name);
                        }
                        print_ifstat(2, cs->prefix, cs->type, cs->rel,
                            cs->array_max, object, cs->name);
                        free(object);
                }
                f_print(fout, "\t\tbreak;\n");
        }
        dflt = def->def.un.default_decl;
        f_print(fout, "\tdefault:\n");
        if (dflt != NULL) {
                if (!streq(dflt->type, "void")) {
                        object = alloc(strlen(def->def_name) + strlen(format) +
                            strlen(dflt->name) + 1);
                        if (isvectordef(dflt->type, dflt->rel)) {
                                s_print(object, vecformat, def->def_name,
                                    dflt->name);
                        } else {
                                s_print(object, format, def->def_name,
                                    dflt->name);
                        }
                        print_ifstat(2, dflt->prefix, dflt->type, dflt->rel,
                            dflt->array_max, object, dflt->name);
                        free(object);
                }
                f_print(fout, "\t\tbreak;\n");
        } else {
                f_print(fout, "\t\treturn (FALSE);\n");
        }

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

static void
emit_struct(definition *def)
{
        decl_list *dl;
        int     i, j, size, flag;
        decl_list *cur = NULL, *psav;
        bas_type *ptr;
        char   *sizestr;
        const char *plus;
        char    ptemp[256];
        int     can_inline;


        if (doinline == 0) {
                f_print(fout, "\n");
                for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
                        print_stat(1, &dl->decl);
                return;
        }
        size = 0;
        can_inline = 0;
        for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
                if ((dl->decl.prefix == NULL) &&
                    ((ptr = find_type(dl->decl.type)) != NULL) &&
                    ((dl->decl.rel == REL_ALIAS) || (dl->decl.rel == REL_VECTOR))) {

                        if (dl->decl.rel == REL_ALIAS)
                                size += ptr->length;
                        else {
                                can_inline = 1;
                                break;  /* can be inlined */
                        };
                } else {
                        if (size >= doinline) {
                                can_inline = 1;
                                break;  /* can be inlined */
                        }
                        size = 0;
                }
        if (size > doinline)
                can_inline = 1;

        if (can_inline == 0) {  /* can not inline, drop back to old mode */
                f_print(fout, "\n");
                for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
                        print_stat(1, &dl->decl);
                return;
        };

        /* May cause lint to complain. but  ... */
        f_print(fout, "\tint32_t *buf;\n");

        flag = PUT;
        f_print(fout, "\n\tif (xdrs->x_op == XDR_ENCODE) {\n");

        for (j = 0; j < 2; j++) {
                i = 0;
                size = 0;
                sizestr = NULL;
                for (dl = def->def.st.decls; dl != NULL; dl = dl->next) {       /* xxx */

                        /* now walk down the list and check for basic types */
                        if ((dl->decl.prefix == NULL) && ((ptr = find_type(dl->decl.type)) != NULL) && ((dl->decl.rel == REL_ALIAS) || (dl->decl.rel == REL_VECTOR))) {
                                if (i == 0)
                                        cur = dl;
                                i++;

                                if (dl->decl.rel == REL_ALIAS)
                                        size += ptr->length;
                                else {
                                        /* this is required to handle arrays */

                                        if (sizestr == NULL)
                                                plus = "";
                                        else
                                                plus = " + ";

                                        if (ptr->length != 1)
                                                s_print(ptemp, "%s%s * %d", plus, dl->decl.array_max, ptr->length);
                                        else
                                                s_print(ptemp, "%s%s", plus, dl->decl.array_max);

                                        /* now concatenate to sizestr !!!! */
                                        if (sizestr == NULL)
                                                sizestr = strdup(ptemp);
                                        else {
                                                char *nsizestr;

                                                nsizestr = realloc(sizestr, strlen(sizestr) + strlen(ptemp) + 1);
                                                if (nsizestr == NULL) {
                                                        err(EXIT_FAILURE, "realloc");
                                                }
                                                sizestr = nsizestr;
                                                sizestr = strcat(sizestr, ptemp);       /* build up length of
                                                                                         * array */

                                        }
                                }

                        } else {
                                if (i > 0)  {
                                        if (sizestr == NULL && size < doinline) {
                                                /* don't expand into inline
                                                 * code if size < doinline */
                                                while (cur != dl) {
                                                        print_stat(2, &cur->decl);
                                                        cur = cur->next;
                                                }
                                        } else {



                                                /* were already looking at a
                                                 * xdr_inlineable structure */
                                                if (sizestr == NULL)
                                                        f_print(fout, "\t\tbuf = (int32_t *)XDR_INLINE(xdrs, %d * BYTES_PER_XDR_UNIT);\n",
                                                            size);
                                                else
                                                        if (size == 0)
                                                                f_print(fout,
                                                                    "\t\tbuf = (int32_t *)XDR_INLINE(xdrs, %s * BYTES_PER_XDR_UNIT);\n",
                                                                    sizestr);
                                                        else
                                                                f_print(fout,
                                                                    "\t\tbuf = (int32_t *)XDR_INLINE(xdrs, (%d + %s) * BYTES_PER_XDR_UNIT);\n",
                                                                    size, sizestr);

                                                f_print(fout, "\t\tif (buf == NULL) {\n");

                                                psav = cur;
                                                while (cur != dl) {
                                                        print_stat(3, &cur->decl);
                                                        cur = cur->next;
                                                }

                                                f_print(fout, "\t\t} else {\n");

                                                cur = psav;
                                                while (cur != dl) {
                                                        emit_inline(&cur->decl, flag);
                                                        cur = cur->next;
                                                }

                                                f_print(fout, "\t\t}\n");
                                        }
                                }
                                size = 0;
                                i = 0;
                                if (sizestr) {
                                        free(sizestr);
                                        sizestr = NULL;
                                }
                                print_stat(2, &dl->decl);
                        }

                }
                if (i > 0) {
                        if (sizestr == NULL && size < doinline) {
                                /* don't expand into inline code if size <
                                 * doinline */
                                while (cur != dl) {
                                        print_stat(2, &cur->decl);
                                        cur = cur->next;
                                }
                        } else {

                                /* were already looking at a xdr_inlineable
                                 * structure */
                                if (sizestr == NULL)
                                        f_print(fout, "\t\tbuf = (int32_t *)XDR_INLINE(xdrs, %d * BYTES_PER_XDR_UNIT);\n",
                                            size);
                                else
                                        if (size == 0)
                                                f_print(fout,
                                                    "\t\tbuf = (int32_t *)XDR_INLINE(xdrs, %s * BYTES_PER_XDR_UNIT);\n",
                                                    sizestr);
                                        else
                                                f_print(fout,
                                                    "\t\tbuf = (int32_t *)XDR_INLINE(xdrs, (%d + %s) * BYTES_PER_XDR_UNIT);\n",
                                                    size, sizestr);

                                f_print(fout, "\t\tif (buf == NULL) {\n");

                                psav = cur;
                                while (cur != NULL) {
                                        print_stat(3, &cur->decl);
                                        cur = cur->next;
                                }
                                f_print(fout, "\t\t} else {\n");

                                cur = psav;
                                while (cur != dl) {
                                        emit_inline(&cur->decl, flag);
                                        cur = cur->next;
                                }

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

                        }
                }
                if (flag == PUT) {
                        flag = GET;
                        f_print(fout, "\t} else if (xdrs->x_op == XDR_DECODE) {\n");
                }
        }

        f_print(fout, "\t} else {\n");

        /* now take care of XDR_FREE case */

        for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
                print_stat(2, &dl->decl);

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

static void
emit_typedef(definition *def)
{
        const char *prefix = def->def.ty.old_prefix;
        const char *type = def->def.ty.old_type;
        const char *amax = def->def.ty.array_max;
        relation rel = def->def.ty.rel;

        f_print(fout, "\n");
        print_ifstat(1, prefix, type, rel, amax, "objp", def->def_name);
}

static void
print_stat(int indent, declaration *dec)
{
        const char *prefix = dec->prefix;
        const char *type = dec->type;
        const char *amax = dec->array_max;
        relation rel = dec->rel;
        char    name[256];

        if (isvectordef(type, rel)) {
                s_print(name, "objp->%s", dec->name);
        } else {
                s_print(name, "&objp->%s", dec->name);
        }
        print_ifstat(indent, prefix, type, rel, amax, name, dec->name);
}


void
emit_inline(declaration *decl, int flag)
{

/*check whether an array or not */

        switch (decl->rel) {
        case REL_ALIAS:
                emit_single_in_line(decl, flag, REL_ALIAS);
                break;
        case REL_VECTOR:
                f_print(fout, "\t\t\t{\n");
                f_print(fout, "\t\t\t\tint i;\n");
                f_print(fout, "\t\t\t\t%s *genp;\n", decl->type);
                f_print(fout, "\n");
                f_print(fout, "\t\t\t\tfor (i = 0, genp = objp->%s;\n",
                    decl->name);
                f_print(fout, "\t\t\t\t    i < %s; i++) {\n\t\t",
                    decl->array_max);
                emit_single_in_line(decl, flag, REL_VECTOR);
                f_print(fout, "\t\t\t\t}\n\t\t\t}\n");
                break;
        case REL_ARRAY:
        case REL_POINTER:
                errx(1, "Internal error at %s:%d: Case %d not handled",
                    __FILE__, __LINE__, decl->rel);
        }
}

void
emit_single_in_line(declaration *decl, int flag, relation rel)
{
        const char *upp_case;
        char *freeable;
        int     freed = 0;

        if (flag == PUT)
                f_print(fout, "\t\t\tIXDR_PUT_");
        else
                if (rel == REL_ALIAS)
                        f_print(fout, "\t\t\tobjp->%s = IXDR_GET_", decl->name);
                else
                        f_print(fout, "\t\t\t*genp++ = IXDR_GET_");

        upp_case = freeable = upcase(decl->type);

        /* hack  - XX */
        if (strcmp(upp_case, "INT") == 0) {
                free(freeable);
                freed = 1;
                upp_case = "INT32";
        } else if (strcmp(upp_case, "U_INT") == 0) {
                free(freeable);
                freed = 1;
                upp_case = "U_INT32";
        }
        if (flag == PUT) {
                if (rel == REL_ALIAS)
                        f_print(fout, "%s(buf, objp->%s);\n", upp_case, decl->name);
                else
                        f_print(fout, "%s(buf, *genp++);\n", upp_case);

        } else
                f_print(fout, "%s(buf);\n", upp_case);
        if (!freed)
                free(freeable);

}


char   *
upcase(const char *str)
{
        char   *ptr, *hptr;


        ptr = malloc(strlen(str) + 1);
        if (ptr == NULL) {
                errx(EXIT_FAILURE, "Out of memory");
        }

        hptr = ptr;
        while (*str != '\0')
                *ptr++ = toupper((unsigned char)*str++);

        *ptr = '\0';
        return (hptr);

}