/*
 * Copyright (c) 2009, Sun Microsystems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of Sun Microsystems, Inc. nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#if 0
static char sccsid[] = "@(#)rpc_hout.c 1.12 89/02/22 (C) 1987 SMI";
#endif

/*
 * 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"
#include "rpc_output.h"


static int	undefined2(char *type, char *stop);
static void	pxdrfuncdecl(char *name, int pointerp);
static void	pconstdef(definition *def);
static void	pargdef(definition *def);
static void	pstructdef(definition *def);
static void	puniondef(definition *def);
static void	pdefine(char *name, char *num);
static void	puldefine(char *name, char *num);
static int	define_printed(proc_list *stop, version_list *start);
static void	pprogramdef(definition *def);
static void	pprocdef(proc_list *proc, version_list *vp,
				char *addargtype, int server_p, int mode);
static void	parglist(proc_list *proc, char *addargtype);
static void	penumdef(definition *def);
static void	ptypedef(definition *def);

/*
 * 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;
	}
	if (def->def_kind != DEF_PROGRAM && def->def_kind != DEF_CONST) {
	  pxdrfuncdecl( 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;
	default:
		break;
	}
}

static void
pxdrfuncdecl(char *name, int pointerp)
{
	f_print(fout,
	"#ifdef __cplusplus \n"
	"extern \"C\" bool_t xdr_%s(XDR *, %s%s);\n"
	"#elif __STDC__ \n"
	"extern  bool_t xdr_%s(XDR *, %s%s);\n"
	"#else /* Old Style C */ \n"
	"bool_t xdr_%s();\n"
	"#endif /* Old Style C */ \n\n",
	name, name, pointerp ? "*" : "",
	name, name, pointerp ? "*" : "",
	name);
}


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);
				pxdrfuncdecl(name, 0);
				f_print( fout, "\n" );
			}
		}

}


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

static void
puldefine(char *name, char *num)
{
	f_print(fout, "#define %s ((u_int32_t)%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
pprogramdef(definition *def)
{
	version_list   *vers;
	proc_list      *proc;
	int             i;
	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);

		/*
		 * Print out 3 definitions, one for ANSI-C, another for C++,
		 * a third for old style C
		 */

		for (i = 0; i < 3; i++) {
			if (i == 0) {
				f_print(fout, "\n#ifdef __cplusplus\n");
				ext = "extern \"C\" ";
			} else if (i == 1) {
				f_print(fout, "\n#elif __STDC__\n");
				ext = "extern  ";
			} else {
				f_print(fout, "\n#else /* Old Style 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);
				}
				f_print(fout, "%s", ext);
				pprocdef(proc, vers, "CLIENT *", 0, i);
				f_print(fout, "%s", ext);
				pprocdef(proc, vers, "struct svc_req *", 1, i);

			}

		}
		f_print(fout, "#endif /* Old Style C */ \n");
	}
}

static void
pprocdef(proc_list *proc, version_list *vp, char *addargtype,
				int server_p, int mode)
{
	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  0 == cplusplus, mode  1 = ANSI-C, mode 2 = old style C
	 */
	if (mode == 0 || mode == 1)
		parglist(proc, addargtype);
	else
		f_print(fout, "();\n");
}


/* print out argument list of procedure */
static void
parglist(proc_list *proc, 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, ", ");
		}
	}

	f_print(fout, "%s);\n", addargtype);
}

static void
penumdef(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++);
			}
		}
		f_print(fout, ",\n");
	}
	f_print(fout, "};\n");
	f_print(fout, "typedef enum %s %s;\n", name, name);
}

static void
ptypedef(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");
	}
}

void
pdeclaration(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 int
undefined2(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);
}