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5515 lines (5022 loc) · 138 KB
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/* Copyright (C) 2003-2015 LiveCode Ltd.
This file is part of LiveCode.
LiveCode is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License v3 as published by the Free
Software Foundation.
LiveCode 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 General Public License
for more details.
You should have received a copy of the GNU General Public License
along with LiveCode. If not see <http://www.gnu.org/licenses/>. */
#include "prefix.h"
#include "globdefs.h"
#include "objdefs.h"
#include "parsedef.h"
#include "filedefs.h"
#include "mcio.h"
#include "exec.h"
#include "dispatch.h"
#include "handler.h"
#include "scriptpt.h"
//#include "execpt.h"
#include "cmds.h"
#include "chunk.h"
#include "mcerror.h"
#include "object.h"
#include "mccontrol.h"
#include "aclip.h"
#include "vclip.h"
#include "eps.h"
#include "image.h"
#include "stack.h"
#include "card.h"
#include "stacklst.h"
#include "sellst.h"
#include "util.h"
#include "printer.h"
#include "hc.h"
#include "globals.h"
#include "securemode.h"
#include "mode.h"
#include "context.h"
#include "osspec.h"
#include "regex.h"
#include "socket.h"
#include "mcssl.h"
#include "iquantization.h"
#include "syntax.h"
#include "variable.h"
#include "exec-interface.h"
#include "resolution.h"
#include "regex.h"
MCClose::~MCClose()
{
delete fname;
delete stack;
}
Parse_stat MCClose::parse(MCScriptPoint &sp)
{
Symbol_type type;
const LT *te;
initpoint(sp);
if (sp.next(type) != PS_NORMAL)
{
MCperror->add
(PE_CLOSE_NOTYPE, sp);
return PS_ERROR;
}
if (sp.lookup(SP_OPEN, te) != PS_NORMAL)
{
if (sp.lookup(SP_VISUAL, te) == PS_NORMAL)
{
sp.skip_token(SP_SHOW, TT_UNDEFINED, SO_WINDOW);
return PS_NORMAL;
}
else
{
sp.backup();
stack = new MCChunk(False);
if (stack->parse(sp, False) != PS_NORMAL)
{
MCperror->add
(PE_CLOSE_BADEXP, sp);
return PS_ERROR;
}
}
}
else
{
arg = (Open_argument)te->which;
if (arg != OA_PRINTING)
{
if (sp.parseexp(False, True, &fname) != PS_NORMAL)
{
MCperror->add
(PE_CLOSE_BADNAME, sp);
return PS_ERROR;
}
}
}
return PS_NORMAL;
}
void MCClose::exec_ctxt(MCExecContext &ctxt)
{
#ifdef /* MCClose */ LEGACY_EXEC
char *name;
uint2 index;
switch (arg)
{
case OA_PRINTING:
MCprinter -> Close();
if (MCsystemprinter != MCprinter)
{
delete MCprinter;
MCprinter = MCsystemprinter;
}
break;
case OA_DRIVER:
case OA_FILE:
if (fname->eval(ep) != ES_NORMAL)
{
MCeerror->add
(EE_CLOSE_BADNAME, line, pos);
return ES_ERROR;
}
name = ep.getsvalue().clone();
if (IO_closefile(name))
MCresult->clear(False);
else
MCresult->sets("file is not open");
delete name;
break;
case OA_PROCESS:
if (fname->eval(ep) != ES_NORMAL)
{
MCeerror->add
(EE_CLOSE_BADNAME, line, pos);
return ES_ERROR;
}
name = ep.getsvalue().clone();
if (IO_findprocess(name, index))
MCS_closeprocess(index);
else
MCresult->sets("process is not open");
delete name;
break;
case OA_SOCKET:
if (fname->eval(ep) != ES_NORMAL)
{
MCeerror->add
(EE_CLOSE_BADNAME, line, pos);
return ES_ERROR;
}
name = ep.getsvalue().clone();
if (IO_findsocket(name, index))
{
MCS_close_socket(MCsockets[index]);
MCresult->clear(False);
}
else
MCresult->sets("socket is not open");
delete name;
break;
default:
MCStack *sptr;
if (stack == NULL)
sptr = MCdefaultstackptr;
else
{
MCObject *optr;
uint4 parid;
if (stack->getobj(ep, optr, parid, True) != ES_NORMAL
|| optr->gettype() != CT_STACK)
{
MCeerror->add
(EE_CLOSE_NOOBJ, line, pos);
return ES_ERROR;
}
sptr = (MCStack *)optr;
}
sptr->close();
sptr->checkdestroy();
}
return ES_NORMAL;
#endif /* MCClose */
if (arg == OA_OBJECT)
{
if (stack == NULL)
MCInterfaceExecCloseDefaultStack(ctxt);
else
{
MCObject *optr;
uint4 parid;
if (!stack->getobj(ctxt, optr, parid, True)
|| optr->gettype() != CT_STACK)
{
ctxt . LegacyThrow(EE_CLOSE_NOOBJ);
return;
}
MCInterfaceExecCloseStack(ctxt, (MCStack *)optr);
}
}
else if (arg == OA_PRINTING)
MCPrintingExecClosePrinting(ctxt);
else
{
MCNewAutoNameRef t_name;
if (!ctxt . EvalExprAsNameRef(fname, EE_CLOSE_BADNAME, &t_name))
return;
switch (arg)
{
case OA_DRIVER:
MCFilesExecCloseDriver(ctxt, *t_name);
break;
case OA_FILE:
MCFilesExecCloseFile(ctxt, *t_name);
break;
case OA_PROCESS:
MCFilesExecCloseProcess(ctxt, *t_name);
break;
case OA_SOCKET:
MCNetworkExecCloseSocket(ctxt, *t_name);
break;
default:
break;
}
}
}
void MCClose::compile(MCSyntaxFactoryRef ctxt)
{
MCSyntaxFactoryBeginStatement(ctxt, line, pos);
if (arg == OA_OBJECT)
{
if (stack == nil)
MCSyntaxFactoryExecMethod(ctxt, kMCInterfaceExecCloseDefaultStackMethodInfo);
else
{
stack -> compile_object_ptr(ctxt);
MCSyntaxFactoryExecMethod(ctxt, kMCInterfaceExecCloseStackMethodInfo);
}
}
else if (arg == OA_PRINTING)
MCSyntaxFactoryExecMethod(ctxt, kMCPrintingExecClosePrintingMethodInfo);
else
{
fname -> compile(ctxt);
switch (arg)
{
case OA_DRIVER:
MCSyntaxFactoryExecMethod(ctxt, kMCFilesExecCloseDriverMethodInfo);
break;
case OA_FILE:
MCSyntaxFactoryExecMethod(ctxt, kMCFilesExecCloseFileMethodInfo);
break;
case OA_PROCESS:
MCSyntaxFactoryExecMethod(ctxt, kMCFilesExecCloseProcessMethodInfo);
break;
case OA_SOCKET:
MCSyntaxFactoryExecMethod(ctxt, kMCNetworkExecCloseSocketMethodInfo);
break;
default:
break;
}
}
MCSyntaxFactoryEndStatement(ctxt);
}
MCEncryptionOp::~MCEncryptionOp()
{
delete ciphername;
delete source;
delete keystr;
delete keylen;
delete salt;
delete iv;
delete rsa_key;
delete rsa_passphrase;
}
Parse_stat MCEncryptionOp::parse(MCScriptPoint &sp)
{
//ENCRYPT|DECRYPT <SOURCE> USING <CIPHER> WITH [KEY] <PASSWORD|KEY> [AND SALT SALTVALUE] [AND IV IVVALUE] [AT BIT BIT]
initpoint(sp);
if (sp.parseexp(False, True, &source) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_BADSOURCE, sp);
return PS_ERROR;
}
if (sp.skip_token(SP_ENCRYPTION, TT_UNDEFINED, ENCRT_USING) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_NOCIPHER, sp);
return PS_ERROR;
}
if (sp.skip_token(SP_ENCRYPTION, TT_UNDEFINED, ENCRT_RSA) == PS_NORMAL)
{
is_rsa = true;
}
else
{
is_rsa = false;
if (sp.parseexp(False, True, &ciphername) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_BADCIPHER, sp);
return PS_ERROR;
}
}
if (sp.skip_token(SP_REPEAT, TT_UNDEFINED, RF_WITH) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_NOKEY, sp);
return PS_ERROR;
}
if (is_rsa)
{
if (sp.skip_token(SP_ENCRYPTION, TT_UNDEFINED, ENCRT_PUBLIC) == PS_NORMAL)
rsa_keytype = RSAKEY_PUBKEY;
else if (sp.skip_token(SP_ENCRYPTION, TT_UNDEFINED, ENCRT_PRIVATE) == PS_NORMAL)
rsa_keytype = RSAKEY_PRIVKEY;
else
{
MCperror->add(PE_ENCRYPTION_BADPARAM, sp);
return PS_ERROR;
}
if (sp.skip_token(SP_ENCRYPTION, TT_UNDEFINED, ENCRT_KEY) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_BADPARAM, sp);
return PS_ERROR;
}
if (sp.parseexp(True, False, &rsa_key) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_BADKEY, sp);
return PS_ERROR;
}
if (sp.skip_token(SP_FACTOR, TT_BINOP, O_AND) == PS_NORMAL)
{
if (sp.skip_token(SP_ENCRYPTION, TT_UNDEFINED, ENCRT_PASSPHRASE) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_BADPARAM, sp);
return PS_ERROR;
}
if (sp.parseexp(True, False, &rsa_passphrase) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_BADKEY, sp);
return PS_ERROR;
}
}
}
else
{
if (sp.skip_token(SP_ENCRYPTION, TT_UNDEFINED, ENCRT_KEY) == PS_NORMAL)
ispassword = False;
else
{
ispassword = True;
sp.skip_token(SP_ENCRYPTION, TT_UNDEFINED, ENCRT_PASSWORD);
}
if (sp.parseexp(True, False, &keystr) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_BADKEY, sp);
return PS_ERROR;
}
// MW-2004-12-01: Bug 2406 - parsing error when attempting to compile 'IV'
if (sp.skip_token(SP_FACTOR, TT_BINOP, O_AND) == PS_NORMAL)
{
Bool expect_iv; // True if we should check for 'IV' clause
if (sp.skip_token(SP_ENCRYPTION, TT_UNDEFINED, ENCRT_SALT) == PS_NORMAL)
{
if (ispassword)
{
if (sp.parseexp(True, False, &salt) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_BADSALT, sp);
return PS_ERROR;
}
}
else
{
MCperror->add(PE_ENCRYPTION_BADPARAM, sp);
return PS_ERROR;
}
expect_iv = sp.skip_token(SP_FACTOR, TT_BINOP, O_AND) == PS_NORMAL;
}
else
expect_iv = True;
// MW-2004-12-29: Relax syntax slightly to allow specifying an IV as well as password and salt
if (expect_iv)
{
if (sp.skip_token(SP_ENCRYPTION, TT_UNDEFINED, ENCRT_IV) == PS_NORMAL)
{
if (sp.parseexp(True, False, &iv) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_BADIV, sp);
return PS_ERROR;
}
}
else
{
MCperror->add(PE_ENCRYPTION_BADPARAM, sp);
return PS_ERROR;
}
}
}
if (sp.skip_token(SP_FACTOR, TT_PREP, PT_AT) == PS_NORMAL)
{
if (sp.parseexp(False, True, &keylen) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_BADBIT, sp);
return PS_ERROR;
}
if (sp.skip_token(SP_ENCRYPTION, TT_UNDEFINED, ENCRT_BIT) != PS_NORMAL)
{
MCperror->add(PE_ENCRYPTION_NOBIT, sp);
return PS_ERROR;
}
}
}
return PS_NORMAL;
}
#ifdef /* MCEncryptionOp::exec_rsa */ LEGACY_EXEC
Exec_stat MCEncryptionOp::exec_rsa(MCExecPoint &ep)
{
Exec_stat t_status = ES_NORMAL;
char *t_rsa_key = nil;
uint32_t t_rsa_keylength;
char *t_rsa_passphrase = nil;
char *t_rsa_out = nil;
uint32_t t_rsa_out_length;
char *t_result = nil;
uint32_t t_error = EE_UNDEFINED;
if (rsa_key->eval(ep) != ES_NORMAL)
{
MCeerror->add(EE_OPEN_BADNAME, line, pos);
t_status = ES_ERROR;
}
if (t_status == ES_NORMAL)
{
const MCString &t_str = ep.getsvalue();
t_rsa_keylength = t_str.getlength();
if (!MCCStringCloneSubstring(t_str.getstring(), t_rsa_keylength, t_rsa_key))
{
MCeerror->add(EE_NO_MEMORY, line, pos);
t_status = ES_ERROR;
}
}
if (t_status == ES_NORMAL && rsa_passphrase != nil)
{
if (rsa_passphrase->eval(ep) != ES_NORMAL)
{
MCeerror->add(EE_OPEN_BADNAME, line, pos);
t_status = ES_ERROR;
}
if (t_status == ES_NORMAL)
{
const MCString &t_str = ep.getsvalue();
if (!MCCStringCloneSubstring(t_str.getstring(), t_str.getlength(), t_rsa_passphrase))
{
MCeerror->add(EE_NO_MEMORY, line, pos);
t_status = ES_ERROR;
}
}
}
if (t_status == ES_NORMAL)
{
if (source->eval(ep) != ES_NORMAL)
{
MCeerror->add(EE_OPEN_BADNAME, line, pos);
t_status = ES_ERROR;
}
}
if (t_status == ES_NORMAL)
{
const MCString &t_string = ep.getsvalue();
if (MCCrypt_rsa_op(!isdecrypt, rsa_keytype, t_string.getstring(), t_string.getlength(),
t_rsa_key, t_rsa_keylength, t_rsa_passphrase, t_rsa_out, t_rsa_out_length, t_result, t_error))
{
MCVariable *t_var;
t_var = ep.getit() -> evalvar(ep);
if (t_var != NULL)
t_var -> grab(t_rsa_out, t_rsa_out_length);
else
free(t_rsa_out);
MCresult->clear();
}
else
{
if (t_result != nil)
MCresult->grab(t_result, MCCStringLength(t_result));
else
{
MCeerror->add(t_error, line, pos);
t_status = ES_ERROR;
}
}
}
MCCStringFree(t_rsa_key);
MCCStringFree(t_rsa_passphrase);
return t_status;
}
#endif /* MCEncryptionOp::exec_rsa */
void MCEncryptionOp::exec_ctxt(MCExecContext &ctxt)
{
#ifdef /* MCEncryptionOp */ LEGACY_EXEC
MCresult->clear(False);
if (is_rsa)
return exec_rsa(ep);
if (ciphername->eval(ep) != ES_NORMAL)
{
MCeerror->add(EE_OPEN_BADNAME, line, pos);
return ES_ERROR;
}
char *cipherstring= ep.getsvalue().clone();
if (keystr->eval(ep) != ES_NORMAL)
{
MCeerror->add(EE_OPEN_BADNAME, line, pos);
return ES_ERROR;
}
uint4 keystringlength = ep.getsvalue().getlength();
char *keystring = new char[keystringlength+1];
memcpy(keystring,ep.getsvalue().getstring(),keystringlength);
uint2 keybits = 0;
if (keylen)
{
if (keylen->eval(ep) != ES_NORMAL || !ep.ton())
{
MCeerror->add(EE_OPEN_BADNAME, line, pos);
return ES_ERROR;
}
keybits = ep.getuint2();
}
char *ivstr,*saltstr;
ivstr = saltstr = NULL;
uint2 saltlen,ivlen;
saltlen = ivlen = 0;
if (salt)
{
if (salt->eval(ep) != ES_NORMAL)
{
delete cipherstring;
delete keystring;
MCeerror->add(EE_OPEN_BADNAME, line, pos);
return ES_ERROR;
}
saltstr = ep.getsvalue().clone();
saltlen = ep.getsvalue().getlength();
}
if (iv)
{
if (iv->eval(ep) != ES_NORMAL)
{
delete cipherstring;
delete keystring;
delete saltstr;
MCeerror->add(EE_OPEN_BADNAME, line, pos);
return ES_ERROR;
}
ivstr = ep.getsvalue().clone();
ivlen = ep.getsvalue().getlength();
}
if (source->eval(ep) != ES_NORMAL)
{
delete cipherstring;
delete keystring;
delete saltstr;
delete ivstr;
MCeerror->add(EE_READ_BADAT, line, pos);
return ES_ERROR;
}
uint4 outlen;
char *outstr = SSL_encode(isdecrypt, cipherstring,
ep.getsvalue().getstring(), ep.getsvalue().getlength(), outlen,
keystring, keystringlength, ispassword, keybits,saltstr,saltlen,ivstr,ivlen);
if (!outstr)
{
char sslerrbuf[256];
if (outlen == 789)
strcpy(sslerrbuf,"invalid cipher name");
else if (outlen == 790)
strcpy(sslerrbuf,"invalid keystring for specified keysize");
else if (outlen == 791)
{
delete cipherstring;
delete keystring;
delete saltstr;
delete ivstr;
MCeerror -> add(EE_NO_MEMORY, line, pos);
return ES_ERROR;
}
else
SSLError(sslerrbuf);
MCresult->copysvalue(sslerrbuf);
}
else
{
MCVariable *t_var;
t_var = ep.getit() -> evalvar(ep);
if (t_var != NULL)
t_var -> grab(outstr, outlen);
else
free(outstr);
MCresult->clear(False);
}
delete cipherstring;
delete keystring;
delete saltstr;
delete ivstr;
return ES_NORMAL;
#endif /* MCEncryptionOp */
ctxt . SetTheResultToEmpty();
if (is_rsa)
{
MCAutoStringRef t_key;
if (!ctxt . EvalExprAsStringRef(rsa_key, EE_OPEN_BADNAME, &t_key))
return;
MCAutoStringRef t_passphrase;
if (!ctxt . EvalOptionalExprAsStringRef(rsa_passphrase, kMCEmptyString, EE_OPEN_BADNAME, &t_passphrase))
return;
MCAutoStringRef t_data;
if (!ctxt . EvalExprAsStringRef(source, EE_OPEN_BADNAME, &t_data))
return;
if (isdecrypt)
MCSecurityExecRsaDecrypt(ctxt, *t_data, rsa_keytype != RSAKEY_PRIVKEY, *t_key, *t_passphrase);
else
MCSecurityExecRsaEncrypt(ctxt, *t_data, rsa_keytype != RSAKEY_PRIVKEY, *t_key, *t_passphrase);
}
else
{
MCNewAutoNameRef t_cipher;
if (!ctxt . EvalExprAsNameRef(ciphername, EE_OPEN_BADNAME, &t_cipher))
return;
MCAutoStringRef t_key;
if (!ctxt . EvalExprAsStringRef(keystr, EE_OPEN_BADNAME, &t_key))
return;
uinteger_t keybits;
if (!ctxt . EvalOptionalExprAsUInt(keylen, 0, EE_OPEN_BADNAME, keybits)
|| keybits > 65535) // Ensure that keybits is an uint2
return;
MCAutoStringRef t_iv;
MCAutoStringRef t_salt;
if (salt != nil && !ctxt . EvalExprAsStringRef(salt, EE_OPEN_BADNAME, &t_salt))
return;
if (iv != nil && !ctxt . EvalExprAsStringRef(iv, EE_OPEN_BADNAME, &t_iv))
return;
MCAutoStringRef t_data;
if (!ctxt . EvalExprAsStringRef(source, EE_READ_BADAT, &t_data))
return;
if (ispassword)
{
if (isdecrypt)
MCSecurityExecBlockDecryptWithPassword(ctxt, *t_data, *t_cipher, *t_key, *t_salt, *t_iv, keybits);
else
MCSecurityExecBlockEncryptWithPassword(ctxt, *t_data, *t_cipher, *t_key, *t_salt, *t_iv, keybits);
}
else
{
if (isdecrypt)
MCSecurityExecBlockDecryptWithKey(ctxt, *t_data, *t_cipher, *t_key, *t_iv, keybits);
else
MCSecurityExecBlockEncryptWithKey(ctxt, *t_data, *t_cipher, *t_key, *t_iv, keybits);
}
}
}
void MCEncryptionOp::compile(MCSyntaxFactoryRef ctxt)
{
MCSyntaxFactoryBeginStatement(ctxt, line, pos);
source -> compile(ctxt);
if (is_rsa)
{
MCSyntaxFactoryEvalConstantBool(ctxt, rsa_keytype != RSAKEY_PRIVKEY);
rsa_key -> compile(ctxt);
if (rsa_passphrase != nil)
rsa_passphrase -> compile(ctxt);
else
MCSyntaxFactoryEvalConstantNil(ctxt);
if (isdecrypt)
MCSyntaxFactoryExecMethod(ctxt, kMCSecurityExecRsaDecryptMethodInfo);
else
MCSyntaxFactoryExecMethod(ctxt, kMCSecurityExecRsaEncryptMethodInfo);
}
else
{
ciphername -> compile(ctxt);
keystr -> compile(ctxt);
if (ispassword)
{
if (salt)
salt -> compile(ctxt);
else
MCSyntaxFactoryEvalConstantNil(ctxt);
}
if (iv)
iv -> compile(ctxt);
else
MCSyntaxFactoryEvalConstantNil(ctxt);
if (keylen)
keylen -> compile(ctxt);
else
MCSyntaxFactoryEvalConstantUInt(ctxt, 0);
if (ispassword)
{
if (isdecrypt)
MCSyntaxFactoryExecMethod(ctxt, kMCSecurityExecBlockDecryptWithPasswordMethodInfo);
else
MCSyntaxFactoryExecMethod(ctxt, kMCSecurityExecBlockEncryptWithPasswordMethodInfo);
}
else
{
if (isdecrypt)
MCSyntaxFactoryExecMethod(ctxt, kMCSecurityExecBlockDecryptWithKeyMethodInfo);
else
MCSyntaxFactoryExecMethod(ctxt, kMCSecurityExecBlockEncryptWithKeyMethodInfo);
}
}
MCSyntaxFactoryEndStatement(ctxt);
}
MCExport::~MCExport()
{
delete fname;
delete exsdisplay;
delete exsstack;
delete exsrect;
delete mname;
delete image;
delete dest;
delete palette_color_count;
delete palette_color_list;
delete size;
// MERG-2014-07-11: metadata array
delete metadata;
}
Parse_stat MCExport::parse(MCScriptPoint &sp)
{
Symbol_type type;
const LT *te;
initpoint(sp);
if (sp.next(type) != PS_NORMAL)
{
MCperror->add(PE_EXPORT_NOTYPE, sp);
return PS_ERROR;
}
if (sp.lookup(SP_EXPORT, te) == PS_NORMAL)
{
sformat = (Export_format)te->which;
// MERG-2014-07-17: Bugfix because export JPEG etc was failing to set the format
format = sformat;
}
else
{
sp.backup();
image = new MCChunk(False);
if (image->parse(sp, False) != PS_NORMAL)
{
MCperror->add(PE_EXPORT_BADTYPE, sp);
return PS_ERROR;
}
}
if (sformat == EX_SNAPSHOT)
{
if (sp.skip_token(SP_FACTOR, TT_FROM) == PS_NORMAL)
{
bool t_has_rectangle;
if (sp.skip_token(SP_FACTOR, TT_PROPERTY, P_RECTANGLE) == PS_NORMAL)
{
if (sp.parseexp(False, True, &exsrect) != PS_NORMAL)
{
MCperror->add(PE_EXPORT_BADTYPE, sp);
return PS_ERROR;
}
t_has_rectangle = true;
}
else
t_has_rectangle = false;
if (!t_has_rectangle || sp.skip_token(SP_FACTOR, TT_OF) == PS_NORMAL)
{
Symbol_type type;
const LT *te = NULL;
// MW-2006-05-04: Bug 3506 - crash in specific case due to not checking result of sp.lookup
// MW-2007-09-11: [[ Bug 5242 ]] - the alternate of this if used to fail if te == NULL, this
// can happen though if we are looking at a variable chunk.
if (sp.next(type) == PS_NORMAL && sp.lookup(SP_FACTOR, te) == PS_NORMAL && te -> type == TT_CHUNK && te -> which == CT_STACK)
{
if (sp.parseexp(False, True, &exsstack) != PS_NORMAL)
{
MCperror->add(PE_IMPORT_BADFILENAME, sp);
return PS_ERROR;
}
sp.skip_token(SP_FACTOR, TT_OF);
if (sp.skip_token(SP_EXPORT, TT_UNDEFINED, EX_DISPLAY) == PS_NORMAL)
if (sp.parseexp(False, True, &exsdisplay) != PS_NORMAL)
{
MCperror->add(PE_EXPORT_BADTYPE, sp);
return PS_ERROR;
}
}
else if (te == NULL || te -> type != TT_TO)
{
sp . backup();
image = new MCChunk(False);
if (image -> parse(sp, False) != PS_NORMAL)
{
MCperror -> add(PE_IMPORT_BADFILENAME, sp);
return PS_ERROR;
}
bool t_need_effects;
if (sp . skip_token(SP_REPEAT, TT_UNDEFINED, RF_WITH) == PS_NORMAL)
t_need_effects = true, with_effects = true;
else if (sp . skip_token(SP_SUGAR, TT_PREP, PT_WITHOUT) == PS_NORMAL)
t_need_effects = true, with_effects = false;
else
t_need_effects = false;
if (t_need_effects &&
sp . skip_token(SP_SUGAR, TT_UNDEFINED, SG_EFFECTS) != PS_NORMAL)
{
// MERG-2014-07-11: [[ ImageMetadata ]] Allow metadata without having to specify effects
if (with_effects && sp . skip_token(SP_FACTOR, TT_PROPERTY, P_METADATA) == PS_NORMAL)
{
sp . backup();
sp . backup();
}
else
{
MCperror -> add(PE_IMPORT_BADFILENAME, sp);
return PS_ERROR;
}
}
}
}
}
if (sp . skip_token(SP_FACTOR, TT_PREP, PT_AT) == PS_NORMAL)
{
if (sp . skip_token(SP_FACTOR, TT_PROPERTY, P_SIZE) != PS_NORMAL ||
sp . parseexp(False, True, &size) != PS_NORMAL)
{
MCperror -> add(PE_IMPORT_BADFILENAME, sp);
return PS_ERROR;
}
}
}
// MERG-2014-07-11: [[ ImageMetadata ]] metadata array
bool t_is_image;
t_is_image = false;
if (sp . skip_token(SP_REPEAT, TT_UNDEFINED, RF_WITH) == PS_NORMAL || sp . skip_token(SP_FACTOR, TT_BINOP, O_AND) == PS_NORMAL )
{
if (sp . skip_token(SP_FACTOR, TT_PROPERTY, P_METADATA) != PS_NORMAL ||
sp . parseexp(False, True, &metadata) != PS_NORMAL)
{
MCperror -> add(PE_IMPORT_BADFILENAME, sp);
return PS_ERROR;
}
t_is_image = true;
}
if (sp.skip_token(SP_FACTOR, TT_TO) != PS_NORMAL)
{
MCperror->add(PE_EXPORT_NOTO, sp);
return PS_ERROR;
}
if (!t_is_image &&
sp.skip_token(SP_VALIDATION, TT_UNDEFINED, IV_ARRAY) == PS_NORMAL)
{
dest = new MCChunk(True);
if (dest->parse(sp, False) != PS_NORMAL)
{
MCperror->add(PE_EXPORT_NOARRAY, sp);
return PS_ERROR;
}
sformat = EX_OBJECT;
}
else
{
if (sp.skip_token(SP_OPEN, TT_UNDEFINED) == PS_NORMAL)
{
if (sp.parseexp(False, True, &fname) != PS_NORMAL)
{
MCperror->add(PE_EXPORT_BADFILENAME, sp);
return PS_ERROR;
}
}
else
{
dest = new MCChunk(True);
if (dest->parse(sp, False) != PS_NORMAL)
{
MCperror->add(PE_EXPORT_NOFILE, sp);
return PS_ERROR;
}
}
if (sp.skip_token(SP_REPEAT, TT_UNDEFINED, RF_WITH) == PS_NORMAL)
{
if (sp.skip_token(SP_EXPORT, TT_UNDEFINED) != PS_NORMAL)
{
MCperror->add(PE_EXPORT_NOMASK, sp);
return PS_ERROR;
}
if (sp.parseexp(False, True, &mname) != PS_NORMAL)
{
MCperror->add(PE_EXPORT_BADMASKNAME, sp);
return PS_ERROR;
}
}
if (sp.skip_token(SP_FACTOR, TT_PREP, PT_AS) == PS_NORMAL)
{
if (sp.next(type) != PS_NORMAL || sp.lookup(SP_EXPORT, te) != PS_NORMAL)
{
MCperror->add(PE_EXPORT_BADTYPE, sp);
return PS_ERROR;
}
format = (Export_format)te->which;
if (format == EX_RAW)
{
Export_format t_format_list[] = {EX_RAW_ARGB, EX_RAW_ABGR, EX_RAW_RGBA, EX_RAW_BGRA};