/*
* General utilites.
* Copyright (c) 1998 New Generation Software (NGS) Oy
*
* Author: Markku Rossi <mtr@ngs.fi>
*/
/*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA
*/
/*
* $Source: /tmp/cvsroot-15-2-2007/clamav-devel/libclamav/js/utils.c,v $
* $Id: utils.c,v 1.2 2006/10/28 11:27:44 njh Exp $
*/
#if HAVE_CONFIG_H
#include "clamav-config.h"
#endif
#ifdef CL_EXPERIMENTAL
#include "jsint.h"
/*
* Global variables.
*/
unsigned char js_latin1_tolower[256] =
{
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0x61, 0xe7,
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7,
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf,
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
};
unsigned char js_latin1_toupper[256] =
{
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xe6, 0xc7,
0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xf7,
0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xff,
};
/*
* Global functions.
*/
void
js_vm_to_primitive (JSVirtualMachine *vm, const JSNode *n,
JSNode *result_return, JSNodeType preferred_type)
{
JSNode args;
switch (n->type)
{
case JS_UNDEFINED:
case JS_NULL:
case JS_BOOLEAN:
case JS_INTEGER:
case JS_FLOAT:
case JS_NAN:
case JS_STRING:
JS_COPY (result_return, n);
break;
case JS_OBJECT:
if (preferred_type == JS_STRING)
{
if (js_vm_call_method (vm, (JSNode *) n, "toString", 0, &args)
&& JS_IS_PRIMITIVE_VALUE (&vm->exec_result))
JS_COPY (result_return, &vm->exec_result);
else if (js_vm_call_method (vm, (JSNode *) n, "valueOf", 0, &args)
&& JS_IS_PRIMITIVE_VALUE (&vm->exec_result))
JS_COPY (result_return, &vm->exec_result);
else
{
sprintf (vm->error, "ToPrimitive(): couldn't convert");
js_vm_error (vm);
}
}
else
{
/* It must be, or it defaults to NUMBER. */
if (js_vm_call_method (vm, (JSNode *) n, "valueOf", 0, &args)
&& JS_IS_PRIMITIVE_VALUE (&vm->exec_result))
JS_COPY (result_return, &vm->exec_result);
else
js_vm_to_string (vm, n, result_return);
}
break;
case JS_BUILTIN:
/* XXX ToPrimitive() for built-ins. */
sprintf (vm->error, "ToPrimitive(): not implemented yet for built-ins");
js_vm_error (vm);
break;
case JS_ARRAY:
case JS_SYMBOL:
case JS_FUNC:
case JS_IPTR:
default:
sprintf (vm->error, "ToPrimitive(): couldn't convert (%d)", n->type);
js_vm_error (vm);
break;
}
}
void
js_vm_to_string (JSVirtualMachine *vm, const JSNode *n, JSNode *result_return)
{
const char *tostring;
JSNode args;
JSNode *nnoconst = (JSNode *) n; /* toString methods behave `constantly'
so no panic here. */
/* Create empty arguments. */
args.type = JS_INTEGER;
args.u.vinteger = 0;
switch (n->type)
{
case JS_UNDEFINED:
tostring = "undefined";
break;
case JS_NULL:
tostring = "null";
break;
case JS_BOOLEAN:
case JS_INTEGER:
case JS_FLOAT:
case JS_NAN:
case JS_STRING:
case JS_ARRAY:
(void) (*vm->prim[n->type]->method_proc) (vm, vm->prim[n->type],
nnoconst, vm->syms.s_toString,
result_return, &args);
return;
break;
case JS_OBJECT:
/* Try to call object's toString() method. */
if (js_vm_call_method (vm, (JSNode *) n, "toString", 0, &args)
&& vm->exec_result.type == JS_STRING)
{
JS_COPY (result_return, &vm->exec_result);
return;
}
/* No match. */
tostring = "object";
break;
case JS_SYMBOL:
tostring = js_vm_symname (vm, n->u.vsymbol);
break;
case JS_BUILTIN:
if (n->u.vbuiltin->info->method_proc)
if ((*n->u.vbuiltin->info->method_proc) (
vm,
n->u.vbuiltin->info,
n->u.vbuiltin->instance_context,
vm->syms.s_toString, result_return,
&args)
== JS_PROPERTY_FOUND)
return;
/* Builtin didn't answer toString(). Let's use our default. */
tostring = "builtin";
break;
case JS_FUNC:
tostring = "function";
break;
case JS_IPTR:
tostring = "pointer";
break;
default:
tostring = "??? unknown type in js_vm_to_string() ???";
break;
}
js_vm_make_static_string (vm, result_return, tostring, strlen (tostring));
}
void
js_vm_to_number (JSVirtualMachine *vm, const JSNode *n, JSNode *result_return)
{
char *cp, *end;
switch (n->type)
{
case JS_UNDEFINED:
result_return->type = JS_NAN;
break;
case JS_NULL:
result_return->type = JS_INTEGER;
result_return->u.vinteger = 0;
break;
case JS_BOOLEAN:
result_return->type = JS_INTEGER;
result_return->u.vinteger = n->u.vboolean ? 1 : 0;
break;
case JS_INTEGER:
case JS_FLOAT:
case JS_NAN:
JS_COPY (result_return, n);
break;
case JS_STRING:
cp = js_string_to_c_string (vm, n);
result_return->u.vinteger = strtol (cp, &end, 10);
if (cp == end)
{
int i;
/* It failed. Check the `Infinity'. */
for (i = 0; cp[i] && JS_IS_STR_WHITE_SPACE_CHAR (cp[i]); i++)
;
if (cp[i] && memcmp (cp + i, "Infinity", 8) == 0)
JS_MAKE_POSITIVE_INFINITY (result_return);
else
result_return->type = JS_NAN;
}
else
{
if (*end == '.' || *end == 'e' || *end == 'E')
{
/* It is a float number. */
result_return->u.vfloat = strtod (cp, &end);
if (cp == end)
/* Couldn't parse. */
result_return->type = JS_NAN;
else
/* Success. */
result_return->type = JS_FLOAT;
}
else
{
/* It is an integer. */
result_return->type = JS_INTEGER;
}
}
js_free (cp);
break;
case JS_ARRAY:
case JS_OBJECT:
case JS_BUILTIN:
/* XXX Not implemented yet. */
result_return->type = JS_NAN;
break;
case JS_SYMBOL:
case JS_FUNC:
case JS_IPTR:
default:
result_return->type = JS_NAN;
break;
}
}
void
js_vm_to_object (JSVirtualMachine *vm, const JSNode *n, JSNode *result_return)
{
switch (n->type)
{
case JS_BOOLEAN:
case JS_INTEGER:
case JS_FLOAT:
case JS_NAN:
case JS_OBJECT:
JS_COPY (result_return, n);
break;
case JS_STRING:
js_vm_make_string (vm, result_return, n->u.vstring->data,
n->u.vstring->len);
break;
case JS_UNDEFINED:
case JS_NULL:
default:
sprintf (vm->error, "ToObject(): illegal argument");
js_vm_error (vm);
break;
}
}
JSInt32
js_vm_to_int32 (JSVirtualMachine *vm, JSNode *n)
{
JSNode intermediate;
JSInt32 result;
js_vm_to_number (vm, n, &intermediate);
switch (intermediate.type)
{
case JS_INTEGER:
result = (JSInt32) intermediate.u.vinteger;
break;
case JS_FLOAT:
if (JS_IS_POSITIVE_INFINITY (&intermediate)
|| JS_IS_NEGATIVE_INFINITY (&intermediate))
result = 0;
else
result = (JSInt32) intermediate.u.vfloat;
break;
case JS_NAN:
default:
result = 0;
break;
}
return result;
}
int
js_vm_to_boolean (JSVirtualMachine *vm, JSNode *n)
{
int result;
switch (n->type)
{
case JS_BOOLEAN:
result = n->u.vboolean;
break;
case JS_INTEGER:
result = n->u.vinteger != 0;
break;
case JS_FLOAT:
result = n->u.vfloat != 0;
break;
case JS_STRING:
result = n->u.vstring->len > 0;
break;
case JS_OBJECT:
result = 1;
break;
case JS_UNDEFINED:
case JS_NULL:
case JS_NAN:
default:
result = 0;
break;
}
return result;
}
#endif /*CL_EXPERIMENTAL*/