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glibc/sunrpc/rpc_parse.c

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/*
* From: @(#)rpc_parse.c 1.8 89/02/22
*
* 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_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_scan.h"
#include "rpc_parse.h"
#include "rpc_util.h"
#include "proto.h"
#define ARGNAME "arg"
static void isdefined (definition * defp);
static void def_struct (definition * defp);
static void def_program (definition * defp);
static void def_enum (definition * defp);
static void def_const (definition * defp);
static void def_union (definition * defp);
static void check_type_name (const char *name, int new_type);
static void def_typedef (definition * defp);
static void get_declaration (declaration * dec, defkind dkind);
static void get_prog_declaration (declaration * dec, defkind dkind, int num);
static void get_type (const char **prefixp, const char **typep, defkind dkind);
static void unsigned_dec (const char **typep);
/*
* return the next definition you see
*/
definition *
get_definition (void)
{
definition *defp;
token tok;
defp = ALLOC (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 = ALLOC (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 = ALLOC (version_list);
vlist->vers_name = tok.str;
scan (TOK_LBRACE, &tok);
ptailp = &vlist->procs;
do
{
/* get result type */
plist = ALLOC (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 = ALLOC (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 = ALLOC (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 = ALLOC (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 *tcase; */
case_list **tailp;
#if 0
int flag;
#endif
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 = ALLOC (case_list);
cases->case_name = tok.str;
scan (TOK_COLON, &tok);
/* now peek at next token */
#if 0
flag = 0;
#endif
if (peekscan (TOK_CASE, &tok))
{
do
{
scan2 (TOK_IDENT, TOK_CHARCONST, &tok);
cases->contflag = 1; /* continued case statement */
*tailp = cases;
tailp = &cases->next;
cases = ALLOC (case_list);
cases->case_name = tok.str;
scan (TOK_COLON, &tok);
}
while (peekscan (TOK_CASE, &tok));
}
#if 0
else if (flag)
{
*tailp = cases;
tailp = &cases->next;
cases = ALLOC (case_list);
};
#endif
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 = ALLOC (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 /* arg number */ )
{
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 *) strdup (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\n");
}
dec->rel = REL_POINTER;
if (peekscan (TOK_IDENT, &tok)) /* optional name of argument */
dec->name = strdup (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 = "quad_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:
*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_quad_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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