/*      $NetBSD: rpc_hout.c,v 1.25 2016/01/23 02:33:09 dholland 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_hout.c 1.12 89/02/22 (C) 1987 SMI";
#else
__RCSID("$NetBSD: rpc_hout.c,v 1.25 2016/01/23 02:33:09 dholland Exp $");
#endif
#endif

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

static void pconstdef(definition *);
static void pargdef(definition *);
static void pstructdef(definition *);
static void puniondef(definition *);
static void pdefine(const char *, const char *);
static void puldefine(const char *, const char *);
static int define_printed(proc_list *, version_list *);
static void pprogramdef(definition *);
static void penumdef(definition *);
static void ptypedef(definition *);
static int undefined2(const char *, const char *);
static void cplusplusstart(void);
static void cplusplusend(void);

/*
 * 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;
        }
}

void
print_progdef(definition *def)
{
        switch (def->def_kind) {
        case DEF_PROGRAM:
                f_print(fout, "\n");
                pprogramdef(def);
                break;
        case DEF_CONST:
        case DEF_TYPEDEF:
        case DEF_ENUM:
        case DEF_UNION:
        case DEF_STRUCT:
                break;
        }
}

void
print_funcdef(definition *def, int *did)
{
        switch (def->def_kind) {
        case DEF_PROGRAM:
        case DEF_CONST:
                break;
        case DEF_TYPEDEF:
        case DEF_ENUM:
        case DEF_UNION:
        case DEF_STRUCT:
                if (!*did) {
                    f_print(fout, "\n");
                    cplusplusstart();
                    *did = 1;
                }
                pxdrfuncdecl(def->def_name,
                    def->def_kind != DEF_TYPEDEF ||
                    !isvectordef(def->def.ty.old_type, def->def.ty.rel));
                break;
        }
}

void
print_funcend(int did) {
        if (did) {
                cplusplusend();
        }
}

void
pxdrfuncdecl(const char *name, int pointerp)
{

        f_print(fout, "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;
        int did;


        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);
                }
        }
        did = 0;
        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 */
                        }

                        if (!did) {
                                cplusplusstart();
                                did = 1;
                        }
                        pxdrfuncdecl(plist->args.argname, 1);
                }
        }
        if (did) {
                cplusplusend();
        }

}


static void
pstructdef(definition *def)
{
        decl_list *l;
        const 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;
        const 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(const char *name, const char *num)
{
        f_print(fout, "#define %s %s\n", name, num);
}

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

static int
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);
                        } else
                                if (streq(proc->proc_name, stop->proc_name)) {
                                        return (1);
                                }
                }
        }
        errx(1, "Internal error at %s:%d: procedure not found",
            __FILE__, __LINE__);
        /* NOTREACHED */
}

static void
cplusplusstart(void)
{
        if (BSDflag)
                f_print(fout, "__BEGIN_DECLS\n");
        else
                f_print(fout, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
}

static void
cplusplusend(void)
{
        if (BSDflag)
                f_print(fout, "__END_DECLS\n");
        else
                f_print(fout, "#ifdef __cplusplus\n};\n#endif\n");
}

static void
pprogramdef(definition *def)
{
        version_list *vers;
        proc_list *proc;

        pargdef(def);

        puldefine(def->def_name, def->def.pr.prog_num);
        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 %s_%s_nproc;\n",
                            locase(def->def_name), vers->vers_num);
                }
                puldefine(vers->vers_name, vers->vers_num);
                for (proc = vers->procs; proc != NULL; proc = proc->next) {
                        if (!define_printed(proc, def->def.pr.versions)) {
                                puldefine(proc->proc_name, proc->proc_num);
                        }
                }
        }

        /*
         * Print out 3 definitions, one for ANSI-C, another for C++, a
         * third for old style C
         */
        f_print(fout, "\n");
        cplusplusstart();
        for (vers = def->def.pr.versions; vers != NULL; vers = vers->next) {
                for (proc = vers->procs; proc != NULL; proc = proc->next) {
                        pprocdef(proc, vers, "CLIENT *", 0);
                        pprocdef(proc, vers, "struct svc_req *", 1);
                }
        }
        cplusplusend();
}

void
pprocdef(proc_list *proc, version_list *vp, const char *addargtype,
     int server_p)
{
        decl_list *dl;

        if (Mflag) {
                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);

        f_print(fout, "(");
        if (proc->arg_num < 2 && newstyle &&
            streq(proc->args.decls->decl.type, "void")) {
                /* 0 argument in new style:  do nothing */
        } else {
                for (dl = proc->args.decls; dl != NULL; dl = dl->next) {
                        ptype(dl->decl.prefix, dl->decl.type, 1);
                        if (!newstyle)
                                f_print(fout, "*");
                        f_print(fout, ", ");
                }
        }
        if (Mflag) {
                if (streq(proc->res_type, "void"))
                        f_print(fout, "char");
                else
                        ptype(proc->res_prefix, proc->res_type, 0);
                if (!isvectordef(proc->res_type, REL_ALIAS))
                        f_print(fout, "*");
                f_print(fout, ", ");
        }
        f_print(fout, "%s);\n", addargtype);
}


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

        f_print(fout, "enum %s {\n", name);
        for (l = def->def.en.vals; l != NULL; l = l->next) {
                f_print(fout, "%s\t%s", first, 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++);
                        }
                }
                first = ",\n";
        }
        f_print(fout, "\n};\n");
        f_print(fout, "typedef enum %s %s;\n", name, name);
}

static void
ptypedef(definition *def)
{
        const char *name = def->def_name;
        const 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) {
                        s_print(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, "\tunsigned 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(const char *name, declaration *dec, int tab,
             const char *separator)
{
        char    buf[8];         /* enough to hold "struct ", include NUL */
        const char *prefix;
        const 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) {
                                        s_print(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, "\tunsigned 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;
                }
        }
        f_print(fout, "%s", separator);
}

static int
undefined2(const char *type, const 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);
                        } else
                                if (streq(def->def_name, type)) {
                                        return (0);
                                }
                }
        }
        return (1);
}