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data.c
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data.c
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/************************************************************************************************************
NAME
data.c
DESCRIPTION
Data-related operations.
AUTHOR
Christian Vigh, 11/2014.
HISTORY
tbd
************************************************************************************************************/
# include "php_vroom.h"
# include "data.h"
/*-----------------------------------------------------------------------------------------------------------
Packing/unpacking function tables.
*-----------------------------------------------------------------------------------------------------------*/
# define WORD_PACKER 0 /* Packer / unpacker index in function table */
# define DWORD_PACKER 1
# define QWORD_PACKER 2
# define WORD_UNPACKER WORD_PACKER
# define DWORD_UNPACKER DWORD_PACKER
# define QWORD_UNPACKER QWORD_PACKER
# define LITTLE_ENDIAN_PACKER 0 /* Endianness index in function table */
# define BIG_ENDIAN_PACKER 1
# define MACHINE_ENDIAN_PACKER 2
# define LITTLE_ENDIAN_UNPACKER LITTLE_ENDIAN_PACKER
# define BIG_ENDIAN_UNPACKER BIG_ENDIAN_PACKER
# define MACHINE_ENDIAN_UNPACKER MACHINE_ENDIAN_PACKER
/* For double to long conversion */
typedef struct boxed_double
{
union
{
double double_value ;
long long long_value ;
} ;
} boxed_double ;
/* Packing/unpacking function prototypes */
typedef zend_bool ( * packer_function ) ( zval * values, int count, char ** result, int * result_length TSRMLS_DC ) ;
typedef zend_bool ( * unpacker_function ) ( zval * binary_string, int count, zval ** result TSRMLS_DC ) ;
/* Packing function table */
static packer_function packer_table [3] [3] =
{
{ internal_data_pack_dwl, internal_data_pack_dwb, NULL },
{ internal_data_pack_ddl, internal_data_pack_ddb, NULL },
{ internal_data_pack_dql, internal_data_pack_dqb, NULL }
} ;
/* Unpacking function table */
static unpacker_function unpacker_table [3] [3] =
{
{ internal_data_unpack_dwl, internal_data_unpack_dwb, NULL },
{ internal_data_unpack_ddl, internal_data_unpack_ddb, NULL },
{ internal_data_unpack_dql, internal_data_unpack_dqb, NULL }
} ;
/*===========================================================================================================
NAME
data_initialize - Initializes the data functions.
*===========================================================================================================*/
void data_initialize ( THRAK_INIT_FUNC_ARGS )
{
/* Register constants for ZVAL types */
REGISTER_LONG_CONSTANT ( "DATA_LITTLE_ENDIAN" , LITTLE_ENDIAN , CONST_CS | CONST_PERSISTENT ) ;
REGISTER_LONG_CONSTANT ( "DATA_BIG_ENDIAN" , BIG_ENDIAN , CONST_CS | CONST_PERSISTENT ) ;
REGISTER_LONG_CONSTANT ( "DATA_MACHINE_ENDIAN" , MACHINE_ENDIAN , CONST_CS | CONST_PERSISTENT ) ;
/* Initialize the "machine-endianness-dependent" packer/unpacker entries */
packer_table [ WORD_PACKER ] [ MACHINE_ENDIAN_PACKER ] = packer_table [ WORD_PACKER ] [ thrak_machine_endianness ] ;
packer_table [ DWORD_PACKER ] [ MACHINE_ENDIAN_PACKER ] = packer_table [ DWORD_PACKER ] [ thrak_machine_endianness ] ;
packer_table [ QWORD_PACKER ] [ MACHINE_ENDIAN_PACKER ] = packer_table [ DWORD_PACKER ] [ thrak_machine_endianness ] ;
unpacker_table [ WORD_UNPACKER ] [ MACHINE_ENDIAN_UNPACKER ] = unpacker_table [ WORD_UNPACKER ] [ thrak_machine_endianness ] ;
unpacker_table [ DWORD_UNPACKER ] [ MACHINE_ENDIAN_UNPACKER ] = unpacker_table [ DWORD_UNPACKER ] [ thrak_machine_endianness ] ;
unpacker_table [ QWORD_UNPACKER ] [ MACHINE_ENDIAN_UNPACKER ] = unpacker_table [ DWORD_UNPACKER ] [ thrak_machine_endianness ] ;
}
/*===========================================================================================================
NAME
data_shutdown
DESCRIPTION
Sub-extension shutdown function.
*===========================================================================================================*/
void data_shutdown ( THRAK_SHUTDOWN_FUNC_ARGS )
{
}
/*===========================================================================================================
Packing functions.
*===========================================================================================================*/
/***
WORD functions
***/
THRAK_API zend_bool internal_data_pack_dwm ( zval * values, int count, char ** result, int * result_length TSRMLS_DC )
{ return ( packer_table [ WORD_PACKER ] [ MACHINE_ENDIAN_PACKER ] ( values, count, result, result_length TSRMLS_CC ) ) ; }
THRAK_API zend_bool internal_data_pack_dwl ( zval * values, int count, char ** result, int * result_length TSRMLS_DC )
{
HashTable * array_hash = Z_ARRVAL_P ( values ) ;
HashPosition pointer ;
zval ** item ;
int real_count = ( count > 0 ) ? min ( count, zend_hash_num_elements ( array_hash ) ) : zend_hash_num_elements ( array_hash ) ;
int real_size = real_count * 2 ;
char * bindata = emalloc ( real_size ) ;
char * p ;
long long value ;
int index = 0 ;
boxed_double box ;
if ( bindata == NULL )
return ( 0 ) ;
p = bindata ;
for ( zend_hash_internal_pointer_reset_ex ( array_hash, & pointer) ;
index < real_count && zend_hash_get_current_data_ex ( array_hash, ( void ** ) & item, & pointer ) == SUCCESS ;
zend_hash_move_forward_ex ( array_hash, & pointer ) )
{
switch ( Z_TYPE_PP ( item ) )
{
case IS_LONG :
case IS_BOOL :
value = Z_LVAL_PP ( item ) ;
break ;
case IS_DOUBLE :
box. double_value = Z_DVAL_PP ( item ) ;
value = box. long_value ;
break ;
default :
php_error_docref ( NULL TSRMLS_CC, E_WARNING, "Non-numeric value found at index %d", index ) ;
efree ( bindata ) ;
return ( 0 ) ;
}
index ++ ;
* ( p ++ ) = value & 0xFF ;
* ( p ++ ) = ( value >> 8 ) & 0xFF ;
}
* result = bindata ;
* result_length = real_size ;
return ( 1 ) ;
}
THRAK_API zend_bool internal_data_pack_dwb ( zval * values, int count, char ** result, int * result_length TSRMLS_DC )
{
HashTable * array_hash = Z_ARRVAL_P ( values ) ;
HashPosition pointer ;
zval ** item ;
int real_count = ( count > 0 ) ? min ( count, zend_hash_num_elements ( array_hash ) ) : zend_hash_num_elements ( array_hash ) ;
int real_size = real_count * 2 ;
char * bindata = emalloc ( real_size ) ;
char * p ;
long long value ;
int index = 0 ;
boxed_double box ;
if ( bindata == NULL )
return ( 0 ) ;
p = bindata ;
for ( zend_hash_internal_pointer_reset_ex ( array_hash, & pointer) ;
index < real_count && zend_hash_get_current_data_ex ( array_hash, ( void ** ) & item, & pointer ) == SUCCESS ;
zend_hash_move_forward_ex ( array_hash, & pointer ) )
{
switch ( Z_TYPE_PP ( item ) )
{
case IS_LONG :
case IS_BOOL :
value = Z_LVAL_PP ( item ) ;
break ;
case IS_DOUBLE :
box. double_value = Z_DVAL_PP ( item ) ;
value = box. long_value ;
break ;
default :
php_error_docref ( NULL TSRMLS_CC, E_WARNING, "Non-numeric value found at index %d", index ) ;
efree ( bindata ) ;
return ( 0 ) ;
}
index ++ ;
* ( p ++ ) = ( value >> 8 ) & 0xFF ;
* ( p ++ ) = value & 0xFF ;
}
* result = bindata ;
* result_length = real_size ;
return ( 1 ) ;
}
/***
DWORD functions
***/
THRAK_API zend_bool internal_data_pack_ddm ( zval * values, int count, char ** result, int * result_length TSRMLS_DC )
{ return ( packer_table [ DWORD_PACKER ] [ MACHINE_ENDIAN_PACKER ] ( values, count, result, result_length TSRMLS_CC ) ) ; }
THRAK_API zend_bool internal_data_pack_ddl ( zval * values, int count, char ** result, int * result_length TSRMLS_DC )
{
HashTable * array_hash = Z_ARRVAL_P ( values ) ;
HashPosition pointer ;
zval ** item ;
int real_count = ( count > 0 ) ? min ( count, zend_hash_num_elements ( array_hash ) ) : zend_hash_num_elements ( array_hash ) ;
int real_size = real_count * 4 ;
char * bindata = emalloc ( real_size ) ;
char * p ;
long long value ;
int index = 0 ;
boxed_double box ;
if ( bindata == NULL )
return ( 0 ) ;
p = bindata ;
for ( zend_hash_internal_pointer_reset_ex ( array_hash, & pointer) ;
index < real_count && zend_hash_get_current_data_ex ( array_hash, ( void ** ) & item, & pointer ) == SUCCESS ;
zend_hash_move_forward_ex ( array_hash, & pointer ) )
{
switch ( Z_TYPE_PP ( item ) )
{
case IS_LONG :
case IS_BOOL :
value = Z_LVAL_PP ( item ) ;
break ;
case IS_DOUBLE :
box. double_value = Z_DVAL_PP ( item ) ;
value = box. long_value ;
break ;
default :
php_error_docref ( NULL TSRMLS_CC, E_WARNING, "Non-numeric value found at index %d", index ) ;
efree ( bindata ) ;
return ( 0 ) ;
}
index ++ ;
* ( p ++ ) = value & 0xFF ;
* ( p ++ ) = ( value >> 8 ) & 0xFF ;
* ( p ++ ) = ( value >> 16 ) & 0xFF ;
* ( p ++ ) = ( value >> 24 ) & 0xFF ;
}
* result = bindata ;
* result_length = real_size ;
return ( 1 ) ;
}
THRAK_API zend_bool internal_data_pack_ddb ( zval * values, int count, char ** result, int * result_length TSRMLS_DC )
{
HashTable * array_hash = Z_ARRVAL_P ( values ) ;
HashPosition pointer ;
zval ** item ;
int real_count = ( count > 0 ) ? min ( count, zend_hash_num_elements ( array_hash ) ) : zend_hash_num_elements ( array_hash ) ;
int real_size = real_count * 4 ;
char * bindata = emalloc ( real_size ) ;
char * p ;
long long value ;
int index = 0 ;
boxed_double box ;
if ( bindata == NULL )
return ( 0 ) ;
p = bindata ;
for ( zend_hash_internal_pointer_reset_ex ( array_hash, & pointer) ;
index < real_count && zend_hash_get_current_data_ex ( array_hash, ( void ** ) & item, & pointer ) == SUCCESS ;
zend_hash_move_forward_ex ( array_hash, & pointer ) )
{
switch ( Z_TYPE_PP ( item ) )
{
case IS_LONG :
case IS_BOOL :
value = Z_LVAL_PP ( item ) ;
break ;
case IS_DOUBLE :
box. double_value = Z_DVAL_PP ( item ) ;
value = box. long_value ;
break ;
default :
php_error_docref ( NULL TSRMLS_CC, E_WARNING, "Non-numeric value found at index %d", index ) ;
efree ( bindata ) ;
return ( 0 ) ;
}
index ++ ;
* ( p ++ ) = ( value >> 24 ) & 0xFF ;
* ( p ++ ) = ( value >> 16 ) & 0xFF ;
* ( p ++ ) = ( value >> 8 ) & 0xFF ;
* ( p ++ ) = value & 0xFF ;
}
* result = bindata ;
* result_length = real_size ;
return ( 1 ) ;
}
/***
QWORD functions
***/
THRAK_API zend_bool internal_data_pack_dqm ( zval * values, int count, char ** result, int * result_length TSRMLS_DC )
{ return ( packer_table [ QWORD_PACKER ] [ MACHINE_ENDIAN_PACKER ] ( values, count, result, result_length TSRMLS_CC ) ) ; }
THRAK_API zend_bool internal_data_pack_dql ( zval * values, int count, char ** result, int * result_length TSRMLS_DC )
{
HashTable * array_hash = Z_ARRVAL_P ( values ) ;
HashPosition pointer ;
zval ** item ;
int real_count = ( count > 0 ) ? min ( count, zend_hash_num_elements ( array_hash ) ) : zend_hash_num_elements ( array_hash ) ;
int real_size = real_count * 8 ;
char * bindata = emalloc ( real_size ) ;
char * p ;
long long value ;
int index = 0 ;
boxed_double box ;
if ( bindata == NULL )
return ( 0 ) ;
p = bindata ;
for ( zend_hash_internal_pointer_reset_ex ( array_hash, & pointer) ;
index < real_count && zend_hash_get_current_data_ex ( array_hash, ( void ** ) & item, & pointer ) == SUCCESS ;
zend_hash_move_forward_ex ( array_hash, & pointer ) )
{
switch ( Z_TYPE_PP ( item ) )
{
case IS_LONG :
case IS_BOOL :
value = Z_LVAL_PP ( item ) ;
break ;
case IS_DOUBLE :
box. double_value = Z_DVAL_PP ( item ) ;
value = box. long_value ;
break ;
default :
php_error_docref ( NULL TSRMLS_CC, E_WARNING, "Non-numeric value found at index %d", index ) ;
efree ( bindata ) ;
return ( 0 ) ;
}
index ++ ;
* ( p ++ ) = value & 0xFF ;
* ( p ++ ) = ( value >> 8 ) & 0xFF ;
* ( p ++ ) = ( value >> 16 ) & 0xFF ;
* ( p ++ ) = ( value >> 24 ) & 0xFF ;
* ( p ++ ) = ( value >> 32 ) & 0xFF ;
* ( p ++ ) = ( value >> 40 ) & 0xFF ;
* ( p ++ ) = ( value >> 48 ) & 0xFF ;
* ( p ++ ) = ( value >> 56 ) & 0xFF ;
}
* result = bindata ;
* result_length = real_size ;
return ( 1 ) ;
}
THRAK_API zend_bool internal_data_pack_dqb ( zval * values, int count, char ** result, int * result_length TSRMLS_DC )
{
HashTable * array_hash = Z_ARRVAL_P ( values ) ;
HashPosition pointer ;
zval ** item ;
int real_count = ( count > 0 ) ? min ( count, zend_hash_num_elements ( array_hash ) ) : zend_hash_num_elements ( array_hash ) ;
int real_size = real_count * 8 ;
char * bindata = emalloc ( real_size ) ;
char * p ;
long long value ;
int index = 0 ;
boxed_double box ;
if ( bindata == NULL )
return ( 0 ) ;
p = bindata ;
for ( zend_hash_internal_pointer_reset_ex ( array_hash, & pointer) ;
index < real_count && zend_hash_get_current_data_ex ( array_hash, ( void ** ) & item, & pointer ) == SUCCESS ;
zend_hash_move_forward_ex ( array_hash, & pointer ) )
{
switch ( Z_TYPE_PP ( item ) )
{
case IS_LONG :
case IS_BOOL :
value = Z_LVAL_PP ( item ) ;
break ;
case IS_DOUBLE :
box. double_value = Z_DVAL_PP ( item ) ;
value = box. long_value ;
break ;
default :
php_error_docref ( NULL TSRMLS_CC, E_WARNING, "Non-numeric value found at index %d", index ) ;
efree ( bindata ) ;
return ( 0 ) ;
}
index ++ ;
* ( p ++ ) = ( value >> 56 ) & 0xFF ;
* ( p ++ ) = ( value >> 48 ) & 0xFF ;
* ( p ++ ) = ( value >> 40 ) & 0xFF ;
* ( p ++ ) = ( value >> 32 ) & 0xFF ;
* ( p ++ ) = ( value >> 24 ) & 0xFF ;
* ( p ++ ) = ( value >> 16 ) & 0xFF ;
* ( p ++ ) = ( value >> 8 ) & 0xFF ;
* ( p ++ ) = value & 0xFF ;
}
* result = bindata ;
* result_length = real_size ;
return ( 1 ) ;
}
/*===========================================================================================================
Unpacking functions.
*===========================================================================================================*/
/***
WORD functions
***/
THRAK_API zend_bool internal_data_unpack_dwm ( zval * binary_string, int count, zval ** result TSRMLS_DC )
{ return ( unpacker_table [ WORD_PACKER ] [ MACHINE_ENDIAN_PACKER ] ( binary_string, count, result TSRMLS_CC ) ) ; }
THRAK_API zend_bool internal_data_unpack_dwl ( zval * binary_string, int count, zval ** result TSRMLS_DC )
{
int real_count = ( count > 0 ) ? min ( Z_STRLEN_P ( binary_string ) / 2, count ) : Z_STRLEN_P ( binary_string ) / 2 ;
char * p = Z_STRVAL_P ( binary_string ) ;
zval * array_result ;
long long value ;
MAKE_STD_ZVAL ( array_result ) ;
array_init ( array_result ) ;
while ( real_count -- )
{
value = ( * p ) |
( ( * ( p + 1 ) ) << 8 ) ;
p += 2 ;
add_next_index_long ( array_result, ( long ) value ) ;
}
* result = array_result ;
return ( 1 ) ;
}
THRAK_API zend_bool internal_data_unpack_dwb ( zval * binary_string, int count, zval ** result TSRMLS_DC )
{
int real_count = ( count > 0 ) ? min ( Z_STRLEN_P ( binary_string ) / 2, count ) : Z_STRLEN_P ( binary_string ) / 2 ;
char * p = Z_STRVAL_P ( binary_string ) ;
zval * array_result ;
long long value ;
MAKE_STD_ZVAL ( array_result ) ;
array_init ( array_result ) ;
while ( real_count -- )
{
value = ( ( * p ) << 8 ) |
( ( * p + 1 ) ) ;
p += 2 ;
add_next_index_long ( array_result, ( long ) value ) ;
}
* result = array_result ;
return ( 1 ) ;
}
/***
DWORD functions
***/
THRAK_API zend_bool internal_data_unpack_ddm ( zval * binary_string, int count, zval ** result TSRMLS_DC )
{ return ( unpacker_table [ DWORD_PACKER ] [ MACHINE_ENDIAN_PACKER ] ( binary_string, count, result TSRMLS_CC ) ) ; }
THRAK_API zend_bool internal_data_unpack_ddl ( zval * binary_string, int count, zval ** result TSRMLS_DC )
{
int real_count = ( count > 0 ) ? min ( Z_STRLEN_P ( binary_string ) / 4, count ) : Z_STRLEN_P ( binary_string ) / 4 ;
char * p = Z_STRVAL_P ( binary_string ) ;
zval * array_result ;
long long value ;
MAKE_STD_ZVAL ( array_result ) ;
array_init ( array_result ) ;
while ( real_count -- )
{
value = ( * p ) |
( ( * ( p + 1 ) ) << 8 ) |
( ( * ( p + 2 ) ) << 16 ) |
( ( * ( p + 3 ) ) << 24 ) ;
p += 4 ;
add_next_index_long ( array_result, ( long ) value ) ;
}
* result = array_result ;
return ( 1 ) ;
}
THRAK_API zend_bool internal_data_unpack_ddb ( zval * binary_string, int count, zval ** result TSRMLS_DC )
{
int real_count = ( count > 0 ) ? min ( Z_STRLEN_P ( binary_string ) / 4, count ) : Z_STRLEN_P ( binary_string ) / 4 ;
char * p = Z_STRVAL_P ( binary_string ) ;
zval * array_result ;
long long value ;
MAKE_STD_ZVAL ( array_result ) ;
array_init ( array_result ) ;
while ( real_count -- )
{
value = ( ( * ( p + 3 ) ) ) |
( ( * ( p + 2 ) ) << 8 ) |
( ( * ( p + 1 ) ) << 16 ) |
( ( * p ) << 24 ) ;
p += 4 ;
add_next_index_long ( array_result, ( long ) value ) ;
}
* result = array_result ;
return ( 1 ) ;
}
/***
QWORD functions
***/
THRAK_API zend_bool internal_data_unpack_dqm ( zval * binary_string, int count, zval ** result TSRMLS_DC )
{ return ( unpacker_table [ QWORD_PACKER ] [ MACHINE_ENDIAN_PACKER ] ( binary_string, count, result TSRMLS_CC ) ) ; }
THRAK_API zend_bool internal_data_unpack_dql ( zval * binary_string, int count, zval ** result TSRMLS_DC )
{
int real_count = ( count > 0 ) ? min ( Z_STRLEN_P ( binary_string ) / 8, count ) : Z_STRLEN_P ( binary_string ) / 8 ;
char * p = Z_STRVAL_P ( binary_string ) ;
zval * array_result ;
long long value ;
MAKE_STD_ZVAL ( array_result ) ;
array_init ( array_result ) ;
while ( real_count -- )
{
value = ( long long ) ( * p ) |
( ( ( long long ) ( * ( p + 1 ) ) ) << 8 ) |
( ( ( long long ) ( * ( p + 2 ) ) ) << 16 ) |
( ( ( long long ) ( * ( p + 3 ) ) ) << 24 ) |
( ( ( long long ) ( * ( p + 4 ) ) ) << 32 ) |
( ( ( long long ) ( * ( p + 5 ) ) ) << 40 ) |
( ( ( long long ) ( * ( p + 6 ) ) ) << 48 ) |
( ( ( long long ) ( * ( p + 7 ) ) ) << 56 ) ;
p += 8 ;
add_next_index_long ( array_result, ( long ) value ) ;
}
* result = array_result ;
return ( 1 ) ;
}
THRAK_API zend_bool internal_data_unpack_dqb ( zval * binary_string, int count, zval ** result TSRMLS_DC )
{
int real_count = ( count > 0 ) ? min ( Z_STRLEN_P ( binary_string ) / 8, count ) : Z_STRLEN_P ( binary_string ) / 8 ;
char * p = Z_STRVAL_P ( binary_string ) ;
zval * array_result ;
long long value ;
MAKE_STD_ZVAL ( array_result ) ;
array_init ( array_result ) ;
while ( real_count -- )
{
value = ( ( long long ) ( * ( p + 7 ) ) ) |
( ( long long ) ( * ( p + 6 ) ) << 8 ) |
( ( long long ) ( * ( p + 5 ) ) << 16 ) |
( ( long long ) ( * ( p + 4 ) ) << 24 ) |
( ( long long ) ( * ( p + 3 ) ) << 32 ) |
( ( long long ) ( * ( p + 2 ) ) << 40 ) |
( ( long long ) ( * ( p + 1 ) ) << 48 ) |
( ( long long ) ( * p ) << 56 ) ;
p += 4 ;
add_next_index_long ( array_result, ( long ) value ) ;
}
* result = array_result ;
return ( 1 ) ;
}
/*===========================================================================================================
Packing/unpacking helper functions.
*===========================================================================================================*/
/***
packer_normalize_input -
Ensures that the first argument of the xxxpack functions is always an array.
Converts to an array if a single scalar value (long, double or bool) has been specified.
***/
static zend_always_inline zend_bool packer_normalize_input ( zval ** value TSRMLS_DC )
{
int status = 1 ;
switch ( Z_TYPE_PP ( value ) )
{
case IS_ARRAY :
break ;
case IS_LONG :
case IS_DOUBLE :
case IS_BOOL :
convert_to_array_ex ( value ) ;
break ;
default :
php_error_docref ( NULL TSRMLS_CC, E_WARNING, "Only an array or a numeric value can be supplied as the first argument of a packing function" ) ;
status = 0 ;
}
return ( status ) ;
}
/***
packer_check_endianness -
Check that the supplied endianness constant is correct.
***/
static zend_always_inline zend_bool packer_check_endianness ( int endianness TSRMLS_DC )
{
switch ( endianness )
{
case MACHINE_ENDIAN :
case LITTLE_ENDIAN :
case BIG_ENDIAN :
return ( 1 ) ;
default :
php_error_docref ( NULL TSRMLS_CC, E_WARNING, "The value supplied for the $endianness parameter must be one of the following constants : "
"DATA_LITTLE_ENDIAN, DATA_BIG_ENDIAN or DATA_MACHINE_ENDIAN" ) ;
return ( 0 ) ;
}
}
/***
packer_check_string -
Checks that the specified zval is a string.
***/
static zend_always_inline zend_bool packer_check_zstring ( zval * data TSRMLS_DC )
{
if ( Z_TYPE_P ( data ) == IS_STRING )
return ( 1 ) ;
else
{
php_error_docref ( NULL TSRMLS_CC, E_WARNING, "Data to be unpacked must be a string." ) ;
return ( 0 ) ;
}
}
/*===========================================================================================================
NAME
data_dwpack, ddpack, dqpack - Packs word/dword/qword values.
PROTOTYPE
$binstr = data_dwpack ( $array, [ count, [ $endianness = DATA_MACHINE_ENDIANNESS ] ] ) ;
$binstr = data_ddpack ( $array, [ count, [ $endianness = DATA_MACHINE_ENDIANNESS ] ] ) ;
$binstr = data_dqpack ( $array, [ count, [ $endianness = DATA_MACHINE_ENDIANNESS ] ] ) ;
$binstr = data_dwlpack ( $array, $count ) ;
$binstr = data_ddlpack ( $array, $count ) ;
$binstr = data_dqlpack ( $array, $count ) ;
$binstr = data_dwbpack ( $array, $count ) ;
$binstr = data_ddbpack ( $array, $count ) ;
$binstr = data_dqbpack ( $array, $count ) ;
$binstr = data_dwmpack ( $array, $count ) ;
$binstr = data_ddmpack ( $array, $count ) ;
$binstr = data_dqmpack ( $array, $count ) ;
DESCRIPTION
These functions pack word/dword/qwords quantities, respectively.
The groups of lpack/bpack/mpack functions packs values in little endian, big endian or machine endian
format.
PARAMETERS
$array (array or scalar value) -
Array of values to be packed, or a scalar value if only one value is to be packed.
In this case, the $count parameter is ignored.
$count (integer) -
Number of values from $array to be packed. If not specified, all values will be packed.
$endianness (integer) -
Endianness of the packed values ; either DATA_LITTLE_ENDIAN, DATA_BIG_ENDIAN or
DATA_MACHINE_ENDIAN to use the machine endianness.
RETURN VALUE
A binary string containing the packed values, or false if an error occurred, such as not enough
memory.
*===========================================================================================================*/
/***
WORD functions.
***/
PHP_FUNCTION ( data_dwpack )
{
zval * array ;
char * result ;
int result_length ;
int count = -1 ;
int endianness = MACHINE_ENDIAN ;
/* Parse arguments */
if ( zend_parse_parameters ( ZEND_NUM_ARGS() TSRMLS_CC, "z|ll", & array, & count, & endianness ) == FAILURE )
return;
/* Ensure that the endianness has a correct value */
if ( ! packer_check_endianness ( endianness TSRMLS_CC ) )
RETURN_FALSE ;
/* Make sure the 1st argument is always an array */
packer_normalize_input ( & array TSRMLS_CC ) ;
/* Call the appropriate packing function - return false if out of memory */
if ( ! packer_table [ WORD_PACKER ] [ endianness ] ( array, count, & result, & result_length TSRMLS_CC ) )
RETURN_FALSE ;
/* Return binary data */
RETURN_STRINGL ( result, result_length, 0 ) ;
}
PHP_FUNCTION ( data_dwlpack )
{
zval * array ;
char * result ;
int result_length ;
int count = -1 ;
/* Parse arguments */
if ( zend_parse_parameters ( ZEND_NUM_ARGS() TSRMLS_CC, "z|l", & array, & count ) == FAILURE )
return;
/* Make sure the 1st argument is always an array */
packer_normalize_input ( & array TSRMLS_CC ) ;
/* Call the appropriate packing function - return false if out of memory */
if ( ! packer_table [ WORD_PACKER ] [ LITTLE_ENDIAN_PACKER ] ( array, count, & result, & result_length TSRMLS_CC ) )
RETURN_FALSE ;
/* Return binary data */
RETURN_STRINGL ( result, result_length, 0 ) ;
}
PHP_FUNCTION ( data_dwbpack )
{
zval * array ;
char * result ;
int result_length ;
int count = -1 ;
/* Parse arguments */
if ( zend_parse_parameters ( ZEND_NUM_ARGS() TSRMLS_CC, "z|l", & array, & count ) == FAILURE )
return;
/* Make sure the 1st argument is always an array */
packer_normalize_input ( & array TSRMLS_CC ) ;
/* Call the appropriate packing function - return false if out of memory */
if ( ! packer_table [ WORD_PACKER ] [ BIG_ENDIAN_PACKER ] ( array, count, & result, & result_length TSRMLS_CC ) )
RETURN_FALSE ;
/* Return binary data */
RETURN_STRINGL ( result, result_length, 0 ) ;
}
PHP_FUNCTION ( data_dwmpack )
{
zval * array ;
char * result ;
int result_length ;
int count = -1 ;
/* Parse arguments */
if ( zend_parse_parameters ( ZEND_NUM_ARGS() TSRMLS_CC, "z|l", & array, & count ) == FAILURE )
return;
/* Make sure the 1st argument is always an array */
packer_normalize_input ( & array TSRMLS_CC ) ;
/* Call the appropriate packing function - return false if out of memory */
if ( ! packer_table [ WORD_PACKER ] [ MACHINE_ENDIAN_PACKER ] ( array, count, & result, & result_length TSRMLS_CC ) )
RETURN_FALSE ;
/* Return binary data */
RETURN_STRINGL ( result, result_length, 0 ) ;
}
/***
DWORD functions.
***/
PHP_FUNCTION ( data_ddpack )
{
zval * array ;
char * result ;
int result_length ;
int count = -1 ;
int endianness = MACHINE_ENDIAN ;
/* Parse arguments */
if ( zend_parse_parameters ( ZEND_NUM_ARGS() TSRMLS_CC, "z|ll", & array, & count, & endianness ) == FAILURE )
return;
/* Ensure that the endianness has a correct value */
if ( ! packer_check_endianness ( endianness TSRMLS_CC ) )
RETURN_FALSE ;
/* Make sure the 1st argument is always an array */
packer_normalize_input ( & array TSRMLS_CC ) ;
/* Call the appropriate packing function - return false if out of memory */
if ( ! packer_table [ DWORD_PACKER ] [ endianness ] ( array, count, & result, & result_length TSRMLS_CC ) )
RETURN_FALSE ;
/* Return binary data */
RETURN_STRINGL ( result, result_length, 0 ) ;
}
PHP_FUNCTION ( data_ddlpack )
{
zval * array ;
char * result ;
int result_length ;
int count = -1 ;
/* Parse arguments */
if ( zend_parse_parameters ( ZEND_NUM_ARGS() TSRMLS_CC, "z|l", & array, & count ) == FAILURE )
return;
/* Make sure the 1st argument is always an array */
packer_normalize_input ( & array TSRMLS_CC ) ;
/* Call the appropriate packing function - return false if out of memory */
if ( ! packer_table [ DWORD_PACKER ] [ LITTLE_ENDIAN_PACKER ] ( array, count, & result, & result_length TSRMLS_CC ) )
RETURN_FALSE ;
/* Return binary data */
RETURN_STRINGL ( result, result_length, 0 ) ;
}
PHP_FUNCTION ( data_ddbpack )
{
zval * array ;
char * result ;
int result_length ;
int count = -1 ;
/* Parse arguments */
if ( zend_parse_parameters ( ZEND_NUM_ARGS() TSRMLS_CC, "z|l", & array, & count ) == FAILURE )
return;
/* Make sure the 1st argument is always an array */
packer_normalize_input ( & array TSRMLS_CC ) ;
/* Call the appropriate packing function - return false if out of memory */
if ( ! packer_table [ DWORD_PACKER ] [ BIG_ENDIAN_PACKER ] ( array, count, & result, & result_length TSRMLS_CC ) )
RETURN_FALSE ;
/* Return binary data */
RETURN_STRINGL ( result, result_length, 0 ) ;
}
PHP_FUNCTION ( data_ddmpack )
{
zval * array ;
char * result ;
int result_length ;
int count = -1 ;
/* Parse arguments */
if ( zend_parse_parameters ( ZEND_NUM_ARGS() TSRMLS_CC, "z|l", & array, & count ) == FAILURE )
return;
/* Make sure the 1st argument is always an array */
packer_normalize_input ( & array TSRMLS_CC ) ;
/* Call the appropriate packing function - return false if out of memory */
if ( ! packer_table [ DWORD_PACKER ] [ MACHINE_ENDIAN_PACKER ] ( array, count, & result, & result_length TSRMLS_CC ) )
RETURN_FALSE ;
/* Return binary data */
RETURN_STRINGL ( result, result_length, 0 ) ;
}