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HardenedBSD/usr.bin/rpcgen/rpc_parse.c
Warner Losh 5b31cc94b1 sccs: Manual changes 
For the uncommon items: Go through the tree and remove sccs tags that
didn't fit any nice pattern. If in the neighborhood, other SCM tags were
removed when they were detritis of long-ago CVS somehow in the early
mists of the project. Some adjacent copyrights stringswere removed (they
duplicated the copyright notices in the file). This also removed
non-standard formations of omission of SCCS tags (usually by adding an
extra #if 0 somewhere.

After this commit, a number of strings tagged with the 'what' @(#)
prefix remain, but they are primarily copyright notices.

Sponsored by:		Netflix
2023-11-26 22:23:58 -07:00

621 lines
14 KiB
C
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/*
* 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_parse.c, Parser for the RPC protocol compiler
* Copyright (C) 1987 Sun Microsystems, Inc.
*/
#include <stdio.h>
#include <string.h>
#include "rpc/types.h"
#include "rpc_parse.h"
#include "rpc_scan.h"
#include "rpc_util.h"
#define ARGNAME "arg"
static void isdefined( definition * );
static void def_struct( definition * );
static void def_program( definition * );
static void def_enum( definition * );
static void def_const( definition * );
static void def_union( definition * );
static void def_typedef( definition * );
static void get_declaration( declaration *, defkind );
static void get_prog_declaration( declaration *, defkind, int );
static void get_type(const char **, const char **, defkind);
static void unsigned_dec(const char ** );
/*
* return the next definition you see
*/
definition *
get_definition(void)
{
definition *defp;
token tok;
defp = XALLOC(definition);
get_token(&tok);
switch (tok.kind) {
case TOK_STRUCT:
def_struct(defp);
break;
case TOK_UNION:
def_union(defp);
break;
case TOK_TYPEDEF:
def_typedef(defp);
break;
case TOK_ENUM:
def_enum(defp);
break;
case TOK_PROGRAM:
def_program(defp);
break;
case TOK_CONST:
def_const(defp);
break;
case TOK_EOF:
free(defp);
return (NULL);
default:
error("definition keyword expected");
}
scan(TOK_SEMICOLON, &tok);
isdefined(defp);
return (defp);
}
static void
isdefined(definition *defp)
{
STOREVAL(&defined, defp);
}
static void
def_struct(definition *defp)
{
token tok;
declaration dec;
decl_list *decls;
decl_list **tailp;
defp->def_kind = DEF_STRUCT;
scan(TOK_IDENT, &tok);
defp->def_name = tok.str;
scan(TOK_LBRACE, &tok);
tailp = &defp->def.st.decls;
do {
get_declaration(&dec, DEF_STRUCT);
decls = XALLOC(decl_list);
decls->decl = dec;
*tailp = decls;
tailp = &decls->next;
scan(TOK_SEMICOLON, &tok);
peek(&tok);
} while (tok.kind != TOK_RBRACE);
get_token(&tok);
*tailp = NULL;
}
static void
def_program(definition *defp)
{
token tok;
declaration dec;
decl_list *decls;
decl_list **tailp;
version_list *vlist;
version_list **vtailp;
proc_list *plist;
proc_list **ptailp;
int num_args;
bool_t isvoid = FALSE; /* whether first argument is void */
defp->def_kind = DEF_PROGRAM;
scan(TOK_IDENT, &tok);
defp->def_name = tok.str;
scan(TOK_LBRACE, &tok);
vtailp = &defp->def.pr.versions;
tailp = &defp->def.st.decls;
scan(TOK_VERSION, &tok);
do {
scan(TOK_IDENT, &tok);
vlist = XALLOC(version_list);
vlist->vers_name = tok.str;
scan(TOK_LBRACE, &tok);
ptailp = &vlist->procs;
do {
/* get result type */
plist = XALLOC(proc_list);
get_type(&plist->res_prefix, &plist->res_type,
DEF_PROGRAM);
if (streq(plist->res_type, "opaque")) {
error("illegal result type");
}
scan(TOK_IDENT, &tok);
plist->proc_name = tok.str;
scan(TOK_LPAREN, &tok);
/* get args - first one */
num_args = 1;
isvoid = FALSE;
/*
* type of DEF_PROGRAM in the first
* get_prog_declaration and DEF_STURCT in the next
* allows void as argument if it is the only argument
*/
get_prog_declaration(&dec, DEF_PROGRAM, num_args);
if (streq(dec.type, "void"))
isvoid = TRUE;
decls = XALLOC(decl_list);
plist->args.decls = decls;
decls->decl = dec;
tailp = &decls->next;
/* get args */
while (peekscan(TOK_COMMA, &tok)) {
num_args++;
get_prog_declaration(&dec, DEF_STRUCT,
num_args);
decls = XALLOC(decl_list);
decls->decl = dec;
*tailp = decls;
if (streq(dec.type, "void"))
isvoid = TRUE;
tailp = &decls->next;
}
/* multiple arguments are only allowed in newstyle */
if (!newstyle && num_args > 1) {
error("only one argument is allowed");
}
if (isvoid && num_args > 1) {
error("illegal use of void in program definition");
}
*tailp = NULL;
scan(TOK_RPAREN, &tok);
scan(TOK_EQUAL, &tok);
scan_num(&tok);
scan(TOK_SEMICOLON, &tok);
plist->proc_num = tok.str;
plist->arg_num = num_args;
*ptailp = plist;
ptailp = &plist->next;
peek(&tok);
} while (tok.kind != TOK_RBRACE);
*ptailp = NULL;
*vtailp = vlist;
vtailp = &vlist->next;
scan(TOK_RBRACE, &tok);
scan(TOK_EQUAL, &tok);
scan_num(&tok);
vlist->vers_num = tok.str;
/* make the argument structure name for each arg */
for (plist = vlist->procs; plist != NULL;
plist = plist->next) {
plist->args.argname = make_argname(plist->proc_name,
vlist->vers_num);
/* free the memory ?? */
}
scan(TOK_SEMICOLON, &tok);
scan2(TOK_VERSION, TOK_RBRACE, &tok);
} while (tok.kind == TOK_VERSION);
scan(TOK_EQUAL, &tok);
scan_num(&tok);
defp->def.pr.prog_num = tok.str;
*vtailp = NULL;
}
static void
def_enum(definition *defp)
{
token tok;
enumval_list *elist;
enumval_list **tailp;
defp->def_kind = DEF_ENUM;
scan(TOK_IDENT, &tok);
defp->def_name = tok.str;
scan(TOK_LBRACE, &tok);
tailp = &defp->def.en.vals;
do {
scan(TOK_IDENT, &tok);
elist = XALLOC(enumval_list);
elist->name = tok.str;
elist->assignment = NULL;
scan3(TOK_COMMA, TOK_RBRACE, TOK_EQUAL, &tok);
if (tok.kind == TOK_EQUAL) {
scan_num(&tok);
elist->assignment = tok.str;
scan2(TOK_COMMA, TOK_RBRACE, &tok);
}
*tailp = elist;
tailp = &elist->next;
} while (tok.kind != TOK_RBRACE);
*tailp = NULL;
}
static void
def_const(definition *defp)
{
token tok;
defp->def_kind = DEF_CONST;
scan(TOK_IDENT, &tok);
defp->def_name = tok.str;
scan(TOK_EQUAL, &tok);
scan2(TOK_IDENT, TOK_STRCONST, &tok);
defp->def.co = tok.str;
}
static void
def_union(definition *defp)
{
token tok;
declaration dec;
case_list *cases;
case_list **tailp;
defp->def_kind = DEF_UNION;
scan(TOK_IDENT, &tok);
defp->def_name = tok.str;
scan(TOK_SWITCH, &tok);
scan(TOK_LPAREN, &tok);
get_declaration(&dec, DEF_UNION);
defp->def.un.enum_decl = dec;
tailp = &defp->def.un.cases;
scan(TOK_RPAREN, &tok);
scan(TOK_LBRACE, &tok);
scan(TOK_CASE, &tok);
while (tok.kind == TOK_CASE) {
scan2(TOK_IDENT, TOK_CHARCONST, &tok);
cases = XALLOC(case_list);
cases->case_name = tok.str;
scan(TOK_COLON, &tok);
/* now peek at next token */
if (peekscan(TOK_CASE, &tok)){
do {
scan2(TOK_IDENT, TOK_CHARCONST, &tok);
cases->contflag = 1;
/* continued case statement */
*tailp = cases;
tailp = &cases->next;
cases = XALLOC(case_list);
cases->case_name = tok.str;
scan(TOK_COLON, &tok);
} while (peekscan(TOK_CASE, &tok));
}
get_declaration(&dec, DEF_UNION);
cases->case_decl = dec;
cases->contflag = 0; /* no continued case statement */
*tailp = cases;
tailp = &cases->next;
scan(TOK_SEMICOLON, &tok);
scan3(TOK_CASE, TOK_DEFAULT, TOK_RBRACE, &tok);
}
*tailp = NULL;
if (tok.kind == TOK_DEFAULT) {
scan(TOK_COLON, &tok);
get_declaration(&dec, DEF_UNION);
defp->def.un.default_decl = XALLOC(declaration);
*defp->def.un.default_decl = dec;
scan(TOK_SEMICOLON, &tok);
scan(TOK_RBRACE, &tok);
} else {
defp->def.un.default_decl = NULL;
}
}
static const char *reserved_words[] =
{
"array",
"bytes",
"destroy",
"free",
"getpos",
"inline",
"pointer",
"reference",
"setpos",
"sizeof",
"union",
"vector",
NULL
};
static const char *reserved_types[] =
{
"opaque",
"string",
NULL
};
/*
* check that the given name is not one that would eventually result in
* xdr routines that would conflict with internal XDR routines.
*/
static void
check_type_name(const char *name, int new_type)
{
int i;
char tmp[100];
for (i = 0; reserved_words[i] != NULL; i++) {
if (strcmp(name, reserved_words[i]) == 0) {
sprintf(tmp,
"illegal (reserved) name :\'%s\' in type definition",
name);
error(tmp);
}
}
if (new_type) {
for (i = 0; reserved_types[i] != NULL; i++) {
if (strcmp(name, reserved_types[i]) == 0) {
sprintf(tmp,
"illegal (reserved) name :\'%s\' in type definition",
name);
error(tmp);
}
}
}
}
static void
def_typedef(definition *defp)
{
declaration dec;
defp->def_kind = DEF_TYPEDEF;
get_declaration(&dec, DEF_TYPEDEF);
defp->def_name = dec.name;
check_type_name(dec.name, 1);
defp->def.ty.old_prefix = dec.prefix;
defp->def.ty.old_type = dec.type;
defp->def.ty.rel = dec.rel;
defp->def.ty.array_max = dec.array_max;
}
static void
get_declaration(declaration *dec, defkind dkind)
{
token tok;
get_type(&dec->prefix, &dec->type, dkind);
dec->rel = REL_ALIAS;
if (streq(dec->type, "void")) {
return;
}
check_type_name(dec->type, 0);
scan2(TOK_STAR, TOK_IDENT, &tok);
if (tok.kind == TOK_STAR) {
dec->rel = REL_POINTER;
scan(TOK_IDENT, &tok);
}
dec->name = tok.str;
if (peekscan(TOK_LBRACKET, &tok)) {
if (dec->rel == REL_POINTER) {
error("no array-of-pointer declarations -- use typedef");
}
dec->rel = REL_VECTOR;
scan_num(&tok);
dec->array_max = tok.str;
scan(TOK_RBRACKET, &tok);
} else if (peekscan(TOK_LANGLE, &tok)) {
if (dec->rel == REL_POINTER) {
error("no array-of-pointer declarations -- use typedef");
}
dec->rel = REL_ARRAY;
if (peekscan(TOK_RANGLE, &tok)) {
dec->array_max = "~0"; /* unspecified size, use max */
} else {
scan_num(&tok);
dec->array_max = tok.str;
scan(TOK_RANGLE, &tok);
}
}
if (streq(dec->type, "opaque")) {
if (dec->rel != REL_ARRAY && dec->rel != REL_VECTOR) {
error("array declaration expected");
}
} else if (streq(dec->type, "string")) {
if (dec->rel != REL_ARRAY) {
error("variable-length array declaration expected");
}
}
}
static void
get_prog_declaration(declaration *dec, defkind dkind, int num)
{
token tok;
char name[10]; /* argument name */
if (dkind == DEF_PROGRAM) {
peek(&tok);
if (tok.kind == TOK_RPAREN) { /* no arguments */
dec->rel = REL_ALIAS;
dec->type = "void";
dec->prefix = NULL;
dec->name = NULL;
return;
}
}
get_type(&dec->prefix, &dec->type, dkind);
dec->rel = REL_ALIAS;
if (peekscan(TOK_IDENT, &tok)) /* optional name of argument */
strcpy(name, tok.str);
else
sprintf(name, "%s%d", ARGNAME, num);
/* default name of argument */
dec->name = (char *) xstrdup(name);
if (streq(dec->type, "void")) {
return;
}
if (streq(dec->type, "opaque")) {
error("opaque -- illegal argument type");
}
if (peekscan(TOK_STAR, &tok)) {
if (streq(dec->type, "string")) {
error("pointer to string not allowed in program arguments");
}
dec->rel = REL_POINTER;
if (peekscan(TOK_IDENT, &tok)) {
/* optional name of argument */
dec->name = xstrdup(tok.str);
}
}
if (peekscan(TOK_LANGLE, &tok)) {
if (!streq(dec->type, "string")) {
error("arrays cannot be declared as arguments to procedures -- use typedef");
}
dec->rel = REL_ARRAY;
if (peekscan(TOK_RANGLE, &tok)) {
dec->array_max = "~0";
/* unspecified size, use max */
} else {
scan_num(&tok);
dec->array_max = tok.str;
scan(TOK_RANGLE, &tok);
}
}
if (streq(dec->type, "string")) {
if (dec->rel != REL_ARRAY) {
/*
* .x specifies just string as
* type of argument
* - make it string<>
*/
dec->rel = REL_ARRAY;
dec->array_max = "~0"; /* unspecified size, use max */
}
}
}
static void
get_type(const char **prefixp, const char **typep, defkind dkind)
{
token tok;
*prefixp = NULL;
get_token(&tok);
switch (tok.kind) {
case TOK_IDENT:
*typep = tok.str;
break;
case TOK_STRUCT:
case TOK_ENUM:
case TOK_UNION:
*prefixp = tok.str;
scan(TOK_IDENT, &tok);
*typep = tok.str;
break;
case TOK_UNSIGNED:
unsigned_dec(typep);
break;
case TOK_SHORT:
*typep = "short";
(void) peekscan(TOK_INT, &tok);
break;
case TOK_LONG:
*typep = "long";
(void) peekscan(TOK_INT, &tok);
break;
case TOK_HYPER:
*typep = "int64_t";
(void) peekscan(TOK_INT, &tok);
break;
case TOK_VOID:
if (dkind != DEF_UNION && dkind != DEF_PROGRAM) {
error("voids allowed only inside union and program definitions with one argument");
}
*typep = tok.str;
break;
case TOK_STRING:
case TOK_OPAQUE:
case TOK_CHAR:
case TOK_INT:
case TOK_FLOAT:
case TOK_DOUBLE:
case TOK_BOOL:
case TOK_QUAD:
*typep = tok.str;
break;
default:
error("expected type specifier");
}
}
static void
unsigned_dec(const char **typep)
{
token tok;
peek(&tok);
switch (tok.kind) {
case TOK_CHAR:
get_token(&tok);
*typep = "u_char";
break;
case TOK_SHORT:
get_token(&tok);
*typep = "u_short";
(void) peekscan(TOK_INT, &tok);
break;
case TOK_LONG:
get_token(&tok);
*typep = "u_long";
(void) peekscan(TOK_INT, &tok);
break;
case TOK_HYPER:
get_token(&tok);
*typep = "u_int64_t";
(void) peekscan(TOK_INT, &tok);
break;
case TOK_INT:
get_token(&tok);
*typep = "u_int";
break;
default:
*typep = "u_int";
break;
}
}
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