/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2001 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.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

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

void storexdrfuncdecl();

static char RESULT[] = "clnt_res";

static enum rpc_gvc {
	PROGRAM,
	VERSION,
	PROCEDURE
};

/*
 * Print the C-version of an xdr definition
 */
void
print_datadef(def)
	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
 */
void
storexdrfuncdecl(char *name, int pointerp)
{
	xdrfunc *xdrptr;

	xdrptr = (xdrfunc *) 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
pconstdef(definition *def)
{
	pdefine(def->def_name, def->def.co);
}

/*
 * print out the definitions for the arguments of functions in the
 * header file
 */
static
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
pstructdef(def)
	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
puniondef(def)
	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
pdefine(name, num)
	char *name;
	char *num;
{
	f_print(fout, "#define\t%s %s\n", name, num);
}

static
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
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);
			}
		}
	}
	abort();
	/* NOTREACHED */
}

static
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
pprogramdef(def)
	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 %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");
		}
	}
}

pprocdef(proc, vp, addargtype, server_p, mode)
	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, server_p);
	else
		f_print(fout, "();\n");



}



/* print out argument list of procedure */
static
parglist(proc, addargtype, server_p)
	proc_list *proc;
	char *addargtype;
	int server_p;
{
	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 */
	} 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
penumdef(def)
	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
ptypedef(def)
	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) {
			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, "\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");
	}
}

pdeclaration(name, dec, tab, separator)
	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) {
				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, "\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;
		}
	}
	f_print(fout, separator);
}

static
undefined2(type, stop)
	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);
			} else if (streq(def->def_name, type)) {
				return (0);
			}
		}
	}
	return (1);
}