/*
 * 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
 *
 * @(#)rpc_hout.c	1.16	94/04/25 SMI; 1.12 89/02/22 (C) 1987 SMI
 * $FreeBSD: src/usr.bin/rpcgen/rpc_hout.c,v 1.15 2005/11/13 21:17:24 dwmalone Exp $
 */

/*
 * rpc_hout.c, Header file outputter for the RPC protocol compiler
 * Copyright (C) 1987, Sun Microsystems, Inc.
 */
#include <stdio.h>
#include <ctype.h>
#include "rpc_parse.h"
#include "rpc_scan.h"
#include "rpc_util.h"

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

/*
 * Print the C-version of an xdr definition
 */
void
print_datadef(definition *def, int headeronly)
{

	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, headeronly);
		break;
	case DEF_CONST:
		pconstdef(def);
		break;
	}
	if (def->def_kind != DEF_PROGRAM && def->def_kind != DEF_CONST) {
		if (def->def_kind != DEF_TYPEDEF ||
		    !isvectordef(def->def.ty.old_type, def->def.ty.rel))
    			storexdrfuncdecl(def->def_name, 1);
		else
    			storexdrfuncdecl(def->def_name, 0);
	}
}


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

/* store away enough information to allow the XDR functions to be spat
    out at the end of the file */

void
storexdrfuncdecl(const char *name, int pointerp)
{
	xdrfunc * xdrptr;

	xdrptr = XALLOC(struct xdrfunc);

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

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

}

void
print_xdr_func_def(const char *name, int pointerp)
{
	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;
	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\t%s %s\n", name, num);
}

static void
puldefine(const char *name, const char *num)
{
	f_print(fout, "#define\t%s ((unsigned long)(%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);
		}
	}
	abort();
	/* NOTREACHED */
}

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

static void
pdispatch(const char * name, const char *vers)
{

	f_print(fout, "void ");
	pvname(name, vers);
	f_print(fout, "(struct svc_req *rqstp, SVCXPRT *transp);\n");
}

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

	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);

		f_print(fout, "\n");
		ext = "extern  ";
		if (headeronly) {
			f_print(fout, "%s", ext);
			pdispatch(def->def_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);
			}
			f_print(fout, "%s", ext);
			pprocdef(proc, vers, "CLIENT *", 0);
			f_print(fout, "%s", ext);
			pprocdef(proc, vers, "struct svc_req *", 1);
		}
		pfreeprocdef(def->def_name, vers->vers_num);
	}
}

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

	parglist(proc, addargtype);
}



/* print out argument list of procedure */
static void
parglist(proc_list *proc, const char *addargtype)
{
	decl_list *dl;

	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, "*");
			/* old style passes by reference */
			f_print(fout, ", ");
		}
	}

	if (mtflag)  {
		ptype(proc->res_prefix, proc->res_type, 1);
		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;

	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)
{
	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, "\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(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, "\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, "%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);
}