/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2009 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.
 */

/*
 * rpc_util.c, Utility routines for the RPC protocol compiler
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
#include "rpc_scan.h"
#include "rpc_parse.h"
#include "rpc_util.h"

extern void crash(void);

static void printwhere(void);

#define	ARGEXT "argument"

char curline[MAXLINESIZE];	/* current read line */
char *where = curline;		/* current point in line */
int linenum = 0;		/* current line number */

char *infilename;		/* input filename */

#define	NFILES   15
char *outfiles[NFILES];		/* output file names */
int nfiles;

FILE *fout;			/* file pointer of current output */
FILE *fin;			/* file pointer of current input */

list *defined;			/* list of defined things */

/*
 * Reinitialize the world
 */
void
reinitialize(void)
{
	(void) memset(curline, 0, MAXLINESIZE);
	where = curline;
	linenum = 0;
	defined = NULL;
}

/*
 * string equality
 */
int
streq(char *a, char *b)
{
	return (strcmp(a, b) == 0);
}

/*
 * find a value in a list
 */
definition *
findval(list *lst, char *val, int (*cmp)())
{
	for (; lst != NULL; lst = lst->next) {
		if ((*cmp) (lst->val, val))
			return (lst->val);
	}
	return (NULL);
}

/*
 * store a value in a list
 */
void
storeval(list **lstp, definition *val)
{
	list **l;
	list *lst;

	for (l = lstp; *l != NULL; l = (list **)&(*l)->next)
		/* LOOP */;
	lst = calloc(1, sizeof (list));
	lst->val = val;
	lst->next = NULL;
	*l = lst;
}

static int
findit(definition *def, char *type)
{
	return (streq(def->def_name, type));
}

static char *
fixit(char *type, char *orig)
{
	definition *def;

	def = (definition *)FINDVAL(defined, type, findit);
	if (def == NULL || def->def_kind != DEF_TYPEDEF)
		return (orig);
	switch (def->def.ty.rel) {
	case REL_VECTOR:
		if (streq(def->def.ty.old_type, "opaque"))
			return ("char");
		return (def->def.ty.old_type);

	case REL_ALIAS:
		return (fixit(def->def.ty.old_type, orig));
	default:
		return (orig);
	}
}

char *
fixtype(char *type)
{
	return (fixit(type, type));
}

char *
stringfix(char *type)
{
	if (streq(type, "string"))
		return ("wrapstring");
	return (type);
}

void
ptype(char *prefix, char *type, int follow)
{
	if (prefix != NULL) {
		if (streq(prefix, "enum")) {
			f_print(fout, "enum ");
		} else {
			f_print(fout, "struct ");
		}
	}
	if (streq(type, "bool")) {
		f_print(fout, "bool_t ");
	} else if (streq(type, "string")) {
		f_print(fout, "char *");
	} else if (streq(type, "oneway")) {
		f_print(fout, "void ");
	} else {
		f_print(fout, "%s ", follow ? fixtype(type) : type);
	}
}

static int
typedefed(definition *def, char *type)
{
	if (def->def_kind != DEF_TYPEDEF || def->def.ty.old_prefix != NULL)
		return (0);
	return (streq(def->def_name, type));
}

int
isvectordef(char *type, relation rel)
{
	definition *def;

	for (;;) {
		switch (rel) {
		case REL_VECTOR:
			return (!streq(type, "string"));
		case REL_ARRAY:
			return (0);
		case REL_POINTER:
			return (0);
		case REL_ALIAS:
			def = (definition *)FINDVAL(defined, type, typedefed);
			if (def == NULL)
				return (0);
			type = def->def.ty.old_type;
			rel = def->def.ty.rel;
		}
	}
}

char *
locase(char *str)
{
	char c;
	static char buf[100];
	char *p = buf;

	while (c = *str++)
		*p++ = (c >= 'A' && c <= 'Z') ? (c - 'A' + 'a') : c;
	*p = 0;
	return (buf);
}

void
pvname_svc(char *pname, char *vnum)
{
	f_print(fout, "%s_%s_svc", locase(pname), vnum);
}

void
pvname(char *pname, char *vnum)
{
	f_print(fout, "%s_%s", locase(pname), vnum);
}

/*
 * print a useful (?) error message, and then die
 */
void
error(char *msg)
{
	printwhere();
	f_print(stderr, "%s, line %d: ", infilename, linenum);
	f_print(stderr, "%s\n", msg);
	crash();
}

/*
 * Something went wrong, unlink any files that we may have created and then
 * die.
 */
void
crash(void)
{
	int i;

	for (i = 0; i < nfiles; i++)
		(void) unlink(outfiles[i]);
	exit(1);
}

void
record_open(char *file)
{
	if (nfiles < NFILES) {
		outfiles[nfiles++] = file;
		return;
	}
	f_print(stderr, "too many files!\n");
	crash();
}

static char expectbuf[100];
static char *toktostr();

/*
 * error, token encountered was not the expected one
 */
void
expected1(tok_kind exp1)
{
	(void) snprintf(expectbuf,
	    sizeof (expectbuf), "expected '%s'", toktostr(exp1));
	error(expectbuf);
}

/*
 * error, token encountered was not one of two expected ones
 */
void
expected2(tok_kind exp1, tok_kind exp2)
{
	(void) snprintf(expectbuf,
	    sizeof (expectbuf), "expected '%s' or '%s'", toktostr(exp1),
	    toktostr(exp2));
	error(expectbuf);
}

/*
 * error, token encountered was not one of 3 expected ones
 */
void
expected3(tok_kind exp1, tok_kind exp2, tok_kind exp3)
{
	(void) snprintf(expectbuf,
	    sizeof (expectbuf), "expected '%s', '%s' or '%s'",
	    toktostr(exp1), toktostr(exp2), toktostr(exp3));
	error(expectbuf);
}

void
tabify(FILE *f, int tab)
{
	while (tab--)
		(void) fputc('\t', f);
}

static token tokstrings[] = {
			{TOK_IDENT, "identifier"},
			{TOK_CONST, "const"},
			{TOK_RPAREN, ")"},
			{TOK_LPAREN, "("},
			{TOK_RBRACE, "}"},
			{TOK_LBRACE, "{"},
			{TOK_LBRACKET, "["},
			{TOK_RBRACKET, "]"},
			{TOK_STAR, "*"},
			{TOK_COMMA, ","},
			{TOK_EQUAL, "="},
			{TOK_COLON, ":"},
			{TOK_SEMICOLON, ";"},
			{TOK_UNION, "union"},
			{TOK_STRUCT, "struct"},
			{TOK_SWITCH, "switch"},
			{TOK_CASE, "case"},
			{TOK_DEFAULT, "default"},
			{TOK_ENUM, "enum"},
			{TOK_TYPEDEF, "typedef"},
			{TOK_INT, "int"},
			{TOK_SHORT, "short"},
			{TOK_LONG, "long"},
			{TOK_UNSIGNED, "unsigned"},
			{TOK_DOUBLE, "double"},
			{TOK_FLOAT, "float"},
			{TOK_CHAR, "char"},
			{TOK_STRING, "string"},
			{TOK_OPAQUE, "opaque"},
			{TOK_BOOL, "bool"},
			{TOK_VOID, "void"},
			{TOK_PROGRAM, "program"},
			{TOK_VERSION, "version"},
			{TOK_EOF, "??????"}
};

static char *
toktostr(tok_kind kind)
{
	token *sp;

	for (sp = tokstrings; sp->kind != TOK_EOF && sp->kind != kind; sp++)
		/* LOOP */;
	return (sp->str);
}

static void
printbuf(void)
{
	char c;
	int i;
	int cnt;

#define	TABSIZE 4

	for (i = 0; (c = curline[i]) != '\0'; i++) {
		if (c == '\t') {
			cnt = 8 - (i % TABSIZE);
			c = ' ';
		} else {
			cnt = 1;
		}
		while (cnt--)
			(void) fputc(c, stderr);
	}
}

static void
printwhere(void)
{
	int i;
	char c;
	int cnt;

	printbuf();
	for (i = 0; i < where - curline; i++) {
		c = curline[i];
		if (c == '\t') {
			cnt = 8 - (i % TABSIZE);
		} else {
			cnt = 1;
		}
		while (cnt--)
			(void) fputc('^', stderr);
	}
	(void) fputc('\n', stderr);
}

char *
make_argname(char *pname, char *vname)
{
	char *name;
	size_t nlen;

	nlen = strlen(pname) + strlen(vname) + strlen(ARGEXT) + 3;
	name = malloc(nlen);
	if (name == NULL) {
		(void) fprintf(stderr, "failed in malloc");
		exit(1);
	}
	(void) snprintf(name, nlen, "%s_%s_%s", locase(pname), vname, ARGEXT);
	return (name);
}

bas_type *typ_list_h;
bas_type *typ_list_t;

void
add_type(int len, char *type)
{
	bas_type *ptr;

	if ((ptr = malloc(sizeof (bas_type))) == NULL) {
		(void) fprintf(stderr, "failed in malloc");
		exit(1);
	}

	ptr->name = type;
	ptr->length = len;
	ptr->next = NULL;
	if (typ_list_t == NULL) {
		typ_list_t = ptr;
		typ_list_h = ptr;
	} else {
		typ_list_t->next = ptr;
		typ_list_t = ptr;
	}
}


bas_type *
find_type(char *type)
{
	bas_type *ptr;

	ptr = typ_list_h;
	while (ptr != NULL) {
		if (strcmp(ptr->name, type) == 0)
			return (ptr);
		ptr = ptr->next;
	}
	return (NULL);
}