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