path: root/usr.bin/rpcgen/rpc_util.c

/*	$OpenBSD: rpc_util.c,v 1.17 2015/08/20 22:32:41 deraadt Exp $	*/
/*	$NetBSD: rpc_util.c,v 1.6 1995/08/29 23:05:57 cgd Exp $	*/

/*
 * Copyright (c) 2010, Oracle America, Inc.
 *
 * 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 the "Oracle America, 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.
 */

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

#define ARGEXT "argument"

static void printwhere(void);

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 7
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()
{
	memset(curline, 0, MAXLINESIZE);
	where = curline;
	linenum = 0;
	defined = NULL;
}

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

/*
 * find a value in a list
 */
definition *
findval(lst, val, cmp)
	list *lst;
	char *val;
	int (*cmp) (definition *, char *);
{

	for (; lst != NULL; lst = lst->next) {
		if ((*cmp) (lst->val, val)) {
			return (lst->val);
		}
	}
	return (NULL);
}

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

	for (l = lstp; *l != NULL; l = (list **) & (*l)->next)
		;
	lst = malloc(sizeof(list));
	if (lst == NULL) {
		fprintf(stderr, "failed in alloc\n");
		exit(1);
	}
	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:
		return (def->def.ty.old_type);
	case REL_ALIAS:
		return (fixit(def->def.ty.old_type, orig));
	default:
		return (orig);
	}
}

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

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

void
ptype(prefix, type, follow)
	char *prefix;
	char *type;
	int follow;
{
	if (prefix != NULL) {
		if (streq(prefix, "enum")) {
			fprintf(fout, "enum ");
		} else {
			fprintf(fout, "struct ");
		}
	}
	if (streq(type, "bool")) {
		fprintf(fout, "bool_t ");
	} else if (streq(type, "string")) {
		fprintf(fout, "char *");
	} else {
		fprintf(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);
	else
		return (streq(def->def_name, type));
}

int
isvectordef(type, rel)
	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(str)
	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(pname, vnum)
	char *pname;
	char *vnum;
{
	fprintf(fout, "%s_%s_svc", locase(pname), vnum);
}

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

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

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

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

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

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

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

/*
 * error, token encountered was not one of two expected ones
 */
void
expected2(exp1, exp2)
	tok_kind exp1, exp2;
{
	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(exp1, exp2, exp3)
	tok_kind exp1, exp2, exp3;
{
	snprintf(expectbuf, sizeof expectbuf, "expected '%s', '%s' or '%s'",
	    toktostr(exp1), toktostr(exp2), toktostr(exp3));
	error(expectbuf);
}

void
tabify(f, tab)
	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++)
		;
	return (sp->str);
}

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

#	define TABSIZE 4

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

static void
printwhere()
{
	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(pname, vname)
	char *pname;
	char *vname;
{
	char *name;
	int len = strlen(pname) + strlen(vname) + strlen(ARGEXT) + 3;

	name = malloc(len);
	if (!name) {
		fprintf(stderr, "failed in malloc\n");
		exit(1);
	}
	snprintf(name, len, "%s_%s_%s", locase(pname), vname, ARGEXT);
	return(name);
}

bas_type *typ_list_h;
bas_type *typ_list_t;

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

	if ((ptr = malloc(sizeof(bas_type))) == (bas_type *)NULL) {
		fprintf(stderr, "failed in malloc\n");
		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(type)
	char *type;
{
	bas_type * ptr;

	ptr = typ_list_h;

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