Sweden-Number/dlls/msi/cond.y

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%{
/*
* Implementation of the Microsoft Installer (msi.dll)
*
* Copyright 2003 Mike McCormack for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#define COBJMACROS
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "msi.h"
#include "msiquery.h"
#include "objbase.h"
#include "oleauto.h"
#include "msipriv.h"
#include "winemsi.h"
#include "wine/debug.h"
#include "wine/exception.h"
#include "wine/list.h"
WINE_DEFAULT_DEBUG_CHANNEL(msi);
typedef struct tag_yyinput
{
MSIPACKAGE *package;
LPCWSTR str;
INT n;
MSICONDITION result;
struct list mem;
} COND_input;
struct cond_str {
LPCWSTR data;
INT len;
};
struct value {
enum value_type {
VALUE_INTEGER,
VALUE_LITERAL,
VALUE_SYMBOL
} type;
union {
INT integer;
WCHAR *string;
} u;
};
static LPWSTR COND_GetString( COND_input *info, const struct cond_str *str );
static LPWSTR COND_GetLiteral( COND_input *info, const struct cond_str *str );
static int cond_lex( void *COND_lval, COND_input *info);
static int cond_error( COND_input *info, const char *str);
static void *cond_alloc( COND_input *cond, unsigned int sz );
static void *cond_track_mem( COND_input *cond, void *ptr, unsigned int sz );
static void cond_free( void *ptr );
static INT compare_int( INT a, INT operator, INT b );
static INT compare_string( LPCWSTR a, INT operator, LPCWSTR b, BOOL convert );
static BOOL num_from_prop( LPCWSTR p, INT *val )
{
INT ret = 0, sign = 1;
if (!p)
return FALSE;
if (*p == '-')
{
sign = -1;
p++;
}
if (!*p)
return FALSE;
while (*p)
{
if( *p < '0' || *p > '9' )
return FALSE;
ret = ret*10 + (*p - '0');
p++;
}
*val = ret*sign;
return TRUE;
}
static void value_free( struct value val )
{
if (val.type != VALUE_INTEGER)
cond_free( val.u.string );
}
%}
%lex-param { COND_input *info }
%parse-param { COND_input *info }
%define api.pure
%union
{
struct cond_str str;
struct value value;
LPWSTR identifier;
INT operator;
BOOL bool;
}
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%token COND_SPACE COND_EOF
%token COND_OR COND_AND COND_NOT COND_XOR COND_IMP COND_EQV
%token COND_LT COND_GT COND_EQ COND_NE COND_GE COND_LE
%token COND_ILT COND_IGT COND_IEQ COND_INE COND_IGE COND_ILE
%token COND_LPAR COND_RPAR COND_TILDA COND_SS COND_ISS
%token COND_ILHS COND_IRHS COND_LHS COND_RHS
%token COND_PERCENT COND_DOLLARS COND_QUESTION COND_AMPER COND_EXCLAM
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%token <str> COND_IDENT <str> COND_NUMBER <str> COND_LITER
%nonassoc COND_ERROR COND_EOF
%type <bool> expression boolean_term boolean_factor
%type <value> value
%type <identifier> identifier
%type <operator> operator
%%
condition:
expression
{
COND_input* cond = (COND_input*) info;
cond->result = $1;
}
| /* empty */
{
COND_input* cond = (COND_input*) info;
cond->result = MSICONDITION_NONE;
}
;
expression:
boolean_term
{
$$ = $1;
}
| expression COND_OR boolean_term
{
$$ = $1 || $3;
}
| expression COND_IMP boolean_term
{
$$ = !$1 || $3;
}
| expression COND_XOR boolean_term
{
$$ = ( $1 || $3 ) && !( $1 && $3 );
}
| expression COND_EQV boolean_term
{
$$ = ( $1 && $3 ) || ( !$1 && !$3 );
}
;
boolean_term:
boolean_factor
{
$$ = $1;
}
| boolean_term COND_AND boolean_factor
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{
$$ = $1 && $3;
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}
;
boolean_factor:
COND_NOT boolean_factor
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{
$$ = !$2;
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}
| value
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{
if ($1.type == VALUE_INTEGER)
$$ = $1.u.integer ? 1 : 0;
else
$$ = $1.u.string && $1.u.string[0];
value_free( $1 );
}
| value operator value
{
if ($1.type == VALUE_INTEGER && $3.type == VALUE_INTEGER)
{
$$ = compare_int($1.u.integer, $2, $3.u.integer);
}
else if ($1.type != VALUE_INTEGER && $3.type != VALUE_INTEGER)
{
$$ = compare_string($1.u.string, $2, $3.u.string,
$1.type == VALUE_SYMBOL || $3.type == VALUE_SYMBOL);
}
else if ($1.type == VALUE_LITERAL || $3.type == VALUE_LITERAL)
{
$$ = ($2 == COND_NE || $2 == COND_INE );
}
else if ($1.type == VALUE_SYMBOL) /* symbol operator integer */
{
int num;
if (num_from_prop( $1.u.string, &num ))
$$ = compare_int( num, $2, $3.u.integer );
else
$$ = ($2 == COND_NE || $2 == COND_INE );
}
else /* integer operator symbol */
{
int num;
if (num_from_prop( $3.u.string, &num ))
$$ = compare_int( $1.u.integer, $2, num );
else
$$ = ($2 == COND_NE || $2 == COND_INE );
}
value_free( $1 );
value_free( $3 );
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}
| COND_LPAR expression COND_RPAR
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{
$$ = $2;
}
;
operator:
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/* common functions */
COND_EQ { $$ = COND_EQ; }
| COND_NE { $$ = COND_NE; }
| COND_LT { $$ = COND_LT; }
| COND_GT { $$ = COND_GT; }
| COND_LE { $$ = COND_LE; }
| COND_GE { $$ = COND_GE; }
| COND_SS { $$ = COND_SS; }
| COND_IEQ { $$ = COND_IEQ; }
| COND_INE { $$ = COND_INE; }
| COND_ILT { $$ = COND_ILT; }
| COND_IGT { $$ = COND_IGT; }
| COND_ILE { $$ = COND_ILE; }
| COND_IGE { $$ = COND_IGE; }
| COND_ISS { $$ = COND_ISS; }
| COND_LHS { $$ = COND_LHS; }
| COND_RHS { $$ = COND_RHS; }
| COND_ILHS { $$ = COND_ILHS; }
| COND_IRHS { $$ = COND_IRHS; }
;
value:
identifier
{
COND_input* cond = (COND_input*) info;
UINT len;
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$$.type = VALUE_SYMBOL;
$$.u.string = msi_dup_property( cond->package->db, $1 );
if ($$.u.string)
{
len = (lstrlenW($$.u.string) + 1) * sizeof (WCHAR);
$$.u.string = cond_track_mem( cond, $$.u.string, len );
}
cond_free( $1 );
}
| COND_PERCENT identifier
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{
COND_input* cond = (COND_input*) info;
UINT len = GetEnvironmentVariableW( $2, NULL, 0 );
$$.type = VALUE_SYMBOL;
$$.u.string = NULL;
if (len++)
{
$$.u.string = cond_alloc( cond, len*sizeof (WCHAR) );
if( !$$.u.string )
YYABORT;
GetEnvironmentVariableW( $2, $$.u.string, len );
}
cond_free( $2 );
}
| COND_LITER
{
COND_input* cond = (COND_input*) info;
$$.type = VALUE_LITERAL;
$$.u.string = COND_GetLiteral( cond, &$1 );
if( !$$.u.string )
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YYABORT;
}
| COND_NUMBER
{
COND_input* cond = (COND_input*) info;
LPWSTR szNum = COND_GetString( cond, &$1 );
if( !szNum )
YYABORT;
$$.type = VALUE_INTEGER;
$$.u.integer = wcstol( szNum, NULL, 10 );
cond_free( szNum );
}
| COND_DOLLARS identifier
{
COND_input* cond = (COND_input*) info;
INSTALLSTATE install = INSTALLSTATE_UNKNOWN, action = INSTALLSTATE_UNKNOWN;
if(MSI_GetComponentStateW(cond->package, $2, &install, &action ) != ERROR_SUCCESS)
{
$$.type = VALUE_LITERAL;
$$.u.string = NULL;
}
else
{
$$.type = VALUE_INTEGER;
$$.u.integer = action;
}
cond_free( $2 );
}
| COND_QUESTION identifier
{
COND_input* cond = (COND_input*) info;
INSTALLSTATE install = INSTALLSTATE_UNKNOWN, action = INSTALLSTATE_UNKNOWN;
if(MSI_GetComponentStateW(cond->package, $2, &install, &action ) != ERROR_SUCCESS)
{
$$.type = VALUE_LITERAL;
$$.u.string = NULL;
}
else
{
$$.type = VALUE_INTEGER;
$$.u.integer = install;
}
cond_free( $2 );
}
| COND_AMPER identifier
{
COND_input* cond = (COND_input*) info;
INSTALLSTATE install, action;
if (MSI_GetFeatureStateW(cond->package, $2, &install, &action ) != ERROR_SUCCESS)
{
$$.type = VALUE_LITERAL;
$$.u.string = NULL;
}
else
{
$$.type = VALUE_INTEGER;
$$.u.integer = action;
}
cond_free( $2 );
}
| COND_EXCLAM identifier
{
COND_input* cond = (COND_input*) info;
INSTALLSTATE install = INSTALLSTATE_UNKNOWN, action = INSTALLSTATE_UNKNOWN;
if(MSI_GetFeatureStateW(cond->package, $2, &install, &action ) != ERROR_SUCCESS)
{
$$.type = VALUE_LITERAL;
$$.u.string = NULL;
}
else
{
$$.type = VALUE_INTEGER;
$$.u.integer = install;
}
cond_free( $2 );
}
;
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identifier:
COND_IDENT
{
COND_input* cond = (COND_input*) info;
$$ = COND_GetString( cond, &$1 );
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if( !$$ )
YYABORT;
}
;
%%
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static int COND_IsAlpha( WCHAR x )
{
return( ( ( x >= 'A' ) && ( x <= 'Z' ) ) ||
( ( x >= 'a' ) && ( x <= 'z' ) ) ||
( ( x == '_' ) ) );
}
static int COND_IsNumber( WCHAR x )
{
return( (( x >= '0' ) && ( x <= '9' )) || (x =='-') || (x =='.') );
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}
static WCHAR *strstriW( const WCHAR *str, const WCHAR *sub )
{
LPWSTR strlower, sublower, r;
strlower = CharLowerW( strdupW( str ) );
sublower = CharLowerW( strdupW( sub ) );
r = wcsstr( strlower, sublower );
if (r)
r = (LPWSTR)str + (r - strlower);
msi_free( strlower );
msi_free( sublower );
return r;
}
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static BOOL str_is_number( LPCWSTR str )
{
int i;
if (!*str)
return FALSE;
for (i = 0; i < lstrlenW( str ); i++)
if (!iswdigit(str[i]))
return FALSE;
return TRUE;
}
static INT compare_substring( LPCWSTR a, INT operator, LPCWSTR b )
{
int lhs, rhs;
/* substring operators return 0 if LHS is missing */
if (!a || !*a)
return 0;
/* substring operators return 1 if RHS is missing */
if (!b || !*b)
return 1;
/* if both strings contain only numbers, use integer comparison */
lhs = wcstol(a, NULL, 10);
rhs = wcstol(b, NULL, 10);
if (str_is_number(a) && str_is_number(b))
return compare_int( lhs, operator, rhs );
switch (operator)
{
case COND_SS:
return wcsstr( a, b ) != 0;
case COND_ISS:
return strstriW( a, b ) != 0;
case COND_LHS:
{
int l = lstrlenW( a );
int r = lstrlenW( b );
if (r > l) return 0;
return !wcsncmp( a, b, r );
}
case COND_RHS:
{
int l = lstrlenW( a );
int r = lstrlenW( b );
if (r > l) return 0;
return !wcsncmp( a + (l - r), b, r );
}
case COND_ILHS:
{
int l = lstrlenW( a );
int r = lstrlenW( b );
if (r > l) return 0;
return !wcsnicmp( a, b, r );
}
case COND_IRHS:
{
int l = lstrlenW( a );
int r = lstrlenW( b );
if (r > l) return 0;
return !wcsnicmp( a + (l - r), b, r );
}
default:
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ERR("invalid substring operator\n");
return 0;
}
return 0;
}
static INT compare_string( LPCWSTR a, INT operator, LPCWSTR b, BOOL convert )
{
if (operator >= COND_SS && operator <= COND_RHS)
return compare_substring( a, operator, b );
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/* null and empty string are equivalent */
if (!a) a = L"";
if (!b) b = L"";
if (convert && str_is_number(a) && str_is_number(b))
return compare_int( wcstol(a, NULL, 10), operator, wcstol(b, NULL, 10) );
/* a or b may be NULL */
switch (operator)
{
case COND_LT:
return wcscmp( a, b ) < 0;
case COND_GT:
return wcscmp( a, b ) > 0;
case COND_EQ:
return wcscmp( a, b ) == 0;
case COND_NE:
return wcscmp( a, b ) != 0;
case COND_GE:
return wcscmp( a, b ) >= 0;
case COND_LE:
return wcscmp( a, b ) <= 0;
case COND_ILT:
return wcsicmp( a, b ) < 0;
case COND_IGT:
return wcsicmp( a, b ) > 0;
case COND_IEQ:
return wcsicmp( a, b ) == 0;
case COND_INE:
return wcsicmp( a, b ) != 0;
case COND_IGE:
return wcsicmp( a, b ) >= 0;
case COND_ILE:
return wcsicmp( a, b ) <= 0;
default:
ERR("invalid string operator\n");
return 0;
}
return 0;
}
static INT compare_int( INT a, INT operator, INT b )
{
switch (operator)
{
case COND_LT:
case COND_ILT:
return a < b;
case COND_GT:
case COND_IGT:
return a > b;
case COND_EQ:
case COND_IEQ:
return a == b;
case COND_NE:
case COND_INE:
return a != b;
case COND_GE:
case COND_IGE:
return a >= b;
case COND_LE:
case COND_ILE:
return a <= b;
case COND_SS:
case COND_ISS:
return ( a & b ) ? 1 : 0;
case COND_RHS:
return ( ( a & 0xffff ) == b ) ? 1 : 0;
case COND_LHS:
return ( ( (a>>16) & 0xffff ) == b ) ? 1 : 0;
default:
ERR("invalid integer operator\n");
return 0;
}
return 0;
}
static int COND_IsIdent( WCHAR x )
{
return( COND_IsAlpha( x ) || COND_IsNumber( x ) || ( x == '_' )
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|| ( x == '#' ) || (x == '.') );
}
static int COND_GetOperator( COND_input *cond )
{
static const struct {
const WCHAR str[4];
int id;
} table[] = {
{ L"~<=", COND_ILE },
{ L"~><", COND_ISS },
{ L"~>>", COND_IRHS },
{ L"~<>", COND_INE },
{ L"~>=", COND_IGE },
{ L"~<<", COND_ILHS },
{ L"~=", COND_IEQ },
{ L"~<", COND_ILT },
{ L"~>", COND_IGT },
{ L">=", COND_GE },
{ L"><", COND_SS },
{ L"<<", COND_LHS },
{ L"<>", COND_NE },
{ L"<=", COND_LE },
{ L">>", COND_RHS },
{ L">", COND_GT },
{ L"<", COND_LT },
{ L"", 0 }
};
LPCWSTR p = &cond->str[cond->n];
int i = 0, len;
while ( 1 )
{
len = lstrlenW( table[i].str );
if ( !len || 0 == wcsncmp( table[i].str, p, len ) )
break;
i++;
}
cond->n += len;
return table[i].id;
}
static int COND_GetOne( struct cond_str *str, COND_input *cond )
{
int rc, len = 1;
WCHAR ch;
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str->data = &cond->str[cond->n];
ch = str->data[0];
switch( ch )
{
case 0: return 0;
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case '(': rc = COND_LPAR; break;
case ')': rc = COND_RPAR; break;
case '&': rc = COND_AMPER; break;
case '!': rc = COND_EXCLAM; break;
case '$': rc = COND_DOLLARS; break;
case '?': rc = COND_QUESTION; break;
case '%': rc = COND_PERCENT; break;
case ' ': rc = COND_SPACE; break;
case '=': rc = COND_EQ; break;
case '~':
case '<':
case '>':
rc = COND_GetOperator( cond );
if (!rc)
rc = COND_ERROR;
return rc;
default:
rc = 0;
}
if ( rc )
{
cond->n += len;
return rc;
}
if (ch == '"' )
{
LPCWSTR p = wcschr( str->data + 1, '"' );
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if (!p) return COND_ERROR;
len = p - str->data + 1;
rc = COND_LITER;
}
else if( COND_IsAlpha( ch ) )
{
while( COND_IsIdent( str->data[len] ) )
len++;
rc = COND_IDENT;
if ( len == 3 )
{
if ( !wcsnicmp( str->data, L"NOT", len ) )
rc = COND_NOT;
else if( !wcsnicmp( str->data, L"AND", len ) )
rc = COND_AND;
else if( !wcsnicmp( str->data, L"XOR", len ) )
rc = COND_XOR;
else if( !wcsnicmp( str->data, L"EQV", len ) )
rc = COND_EQV;
else if( !wcsnicmp( str->data, L"IMP", len ) )
rc = COND_IMP;
}
else if( (len == 2) && !wcsnicmp( str->data, L"OR", len ) )
rc = COND_OR;
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}
else if( COND_IsNumber( ch ) )
{
while( COND_IsNumber( str->data[len] ) )
len++;
rc = COND_NUMBER;
}
else
{
ERR("Got unknown character %c(%x)\n",ch,ch);
return COND_ERROR;
}
cond->n += len;
str->len = len;
return rc;
}
static int cond_lex( void *COND_lval, COND_input *cond )
{
int rc;
struct cond_str *str = COND_lval;
do {
rc = COND_GetOne( str, cond );
} while (rc == COND_SPACE);
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return rc;
}
static LPWSTR COND_GetString( COND_input *cond, const struct cond_str *str )
{
LPWSTR ret;
ret = cond_alloc( cond, (str->len+1) * sizeof (WCHAR) );
if( ret )
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{
memcpy( ret, str->data, str->len * sizeof(WCHAR));
ret[str->len]=0;
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}
TRACE("Got identifier %s\n",debugstr_w(ret));
return ret;
}
static LPWSTR COND_GetLiteral( COND_input *cond, const struct cond_str *str )
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{
LPWSTR ret;
ret = cond_alloc( cond, (str->len-1) * sizeof (WCHAR) );
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if( ret )
{
memcpy( ret, str->data+1, (str->len-2) * sizeof(WCHAR) );
ret[str->len - 2]=0;
}
TRACE("Got literal %s\n",debugstr_w(ret));
return ret;
}
static void *cond_alloc( COND_input *cond, unsigned int sz )
{
struct list *mem;
mem = msi_alloc( sizeof (struct list) + sz );
if( !mem )
return NULL;
list_add_head( &(cond->mem), mem );
return mem + 1;
}
static void *cond_track_mem( COND_input *cond, void *ptr, unsigned int sz )
{
void *new_ptr;
if( !ptr )
return ptr;
new_ptr = cond_alloc( cond, sz );
if( !new_ptr )
{
msi_free( ptr );
return NULL;
}
memcpy( new_ptr, ptr, sz );
msi_free( ptr );
return new_ptr;
}
static void cond_free( void *ptr )
{
struct list *mem = (struct list *)ptr - 1;
if( ptr )
{
list_remove( mem );
msi_free( mem );
}
}
static int cond_error( COND_input *info, const char *str )
{
TRACE("%s\n", str );
return 0;
}
MSICONDITION MSI_EvaluateConditionW( MSIPACKAGE *package, LPCWSTR szCondition )
{
COND_input cond;
MSICONDITION r;
struct list *mem, *safety;
TRACE("%s\n", debugstr_w( szCondition ) );
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if (szCondition == NULL) return MSICONDITION_NONE;
cond.package = package;
cond.str = szCondition;
cond.n = 0;
cond.result = MSICONDITION_ERROR;
list_init( &cond.mem );
if ( !cond_parse( &cond ) )
r = cond.result;
else
r = MSICONDITION_ERROR;
LIST_FOR_EACH_SAFE( mem, safety, &cond.mem )
{
/* The tracked memory lives directly after the list struct */
void *ptr = mem + 1;
if ( r != MSICONDITION_ERROR )
WARN( "condition parser failed to free up some memory: %p\n", ptr );
cond_free( ptr );
}
TRACE("%i <- %s\n", r, debugstr_w(szCondition));
return r;
}
MSICONDITION WINAPI MsiEvaluateConditionW( MSIHANDLE hInstall, LPCWSTR szCondition )
{
MSIPACKAGE *package;
UINT ret;
package = msihandle2msiinfo( hInstall, MSIHANDLETYPE_PACKAGE);
if( !package )
{
MSIHANDLE remote;
if (!(remote = msi_get_remote(hInstall)))
return MSICONDITION_ERROR;
if (!szCondition)
return MSICONDITION_NONE;
__TRY
{
ret = remote_EvaluateCondition(remote, szCondition);
}
__EXCEPT(rpc_filter)
{
ret = GetExceptionCode();
}
__ENDTRY
return ret;
}
ret = MSI_EvaluateConditionW( package, szCondition );
msiobj_release( &package->hdr );
return ret;
}
MSICONDITION WINAPI MsiEvaluateConditionA( MSIHANDLE hInstall, LPCSTR szCondition )
{
LPWSTR szwCond = NULL;
MSICONDITION r;
szwCond = strdupAtoW( szCondition );
if( szCondition && !szwCond )
return MSICONDITION_ERROR;
r = MsiEvaluateConditionW( hInstall, szwCond );
msi_free( szwCond );
return r;
}