usr/src/lib/librpc/rpcgen/rpc_cout.c

/* @(#)rpc_cout.c       2.1 88/08/01 4.0 RPCSRC */
/*
 * 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
 */
#ifndef lint
static char sccsid[] = "@(#)rpc_cout.c 1.8 87/06/24 (C) 1987 SMI";
#endif

/*
 * rpc_cout.c, XDR routine outputter for the RPC protocol compiler
 * Copyright (C) 1987, Sun Microsystems, Inc.
 */
#include <stdio.h>
#include <strings.h>
#include "rpc_util.h"
#include "rpc_parse.h"

/*
 * Emit the C-routine for the given definition
 */
void
emit(def)
        definition *def;
{
        if (def->def_kind == DEF_PROGRAM || def->def_kind == DEF_CONST) {
                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;
        }
        print_trailer();
}

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

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

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


static
print_header(def)
        definition *def;
{
        space();
        f_print(fout, "bool_t\n");
        f_print(fout, "xdr_%s(xdrs, objp)\n", def->def_name);
        f_print(fout, "\tXDR *xdrs;\n");
        f_print(fout, "\t%s ", def->def_name);
        if (def->def_kind != DEF_TYPEDEF ||
            !isvectordef(def->def.ty.old_type, def->def.ty.rel)) {
                f_print(fout, "*");
        }
        f_print(fout, "objp;\n");
        f_print(fout, "{\n");
}

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


static
print_ifopen(indent, name)
        int indent;
        char *name;
{
        tabify(fout, indent);
        f_print(fout, "if (!xdr_%s(xdrs", name);
}


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


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

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

static
space()
{
        f_print(fout, "\n\n");
}

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

        switch (rel) {
        case REL_POINTER:
                print_ifopen(indent, "pointer");
                print_ifarg("(char **)");
                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 *)");
                        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 **)");
                        if (*objname == '&') {
                                f_print(fout, "%s.%s_val, (u_int *)%s.%s_len",
                                        objname, name, objname, name);
                        } else {
                                f_print(fout, "&%s->%s_val, (u_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
emit_enum(def)
        definition *def;
{
        print_ifopen(1, "enum");
        print_ifarg("(enum_t *)objp");
        print_ifclose(1);
}


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

        print_stat(&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) {
                cs = &cl->case_decl;
                f_print(fout, "\tcase %s:\n", cl->case_name);
                if (!streq(cs->type, "void")) {
                        object = alloc(strlen(def->def_name) + strlen(format) +
                                       strlen(cs->name) + 1);
                        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;
        if (dflt != NULL) {
                if (!streq(dflt->type, "void")) {
                        f_print(fout, "\tdefault:\n");
                        object = alloc(strlen(def->def_name) + strlen(format) +
                                       strlen(dflt->name) + 1);
                        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, "\tdefault:\n");
                f_print(fout, "\t\treturn (FALSE);\n");
        }
        f_print(fout, "\t}\n");
}


static
emit_struct(def)
        definition *def;
{
        decl_list *dl;

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


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

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


static
print_stat(dec)
        declaration *dec;
{
        char *prefix = dec->prefix;
        char *type = dec->type;
        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(1, prefix, type, rel, amax, name, dec->name);
}