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UPGRADING.INTERNALS
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$Id$
PHP 7.0 INTERNALS UPGRADE NOTES
1. Internal API changes
e. New data types
f. zend_parse_parameters() specs
g. sprintf() formats
h. HashTable API
i. New portable macros for large file support
j. New portable macros for integers
2. Build system changes
a. Unix build system changes
b. Windows build system changes
========================
1. Internal API changes
========================
a. zend_set_memory_limit() now takes the TSRMLS_CC macro as its last argument
e. New data types
String
Besides the old way of accepting the strings with 's', the new 'S' ZPP spec
was introduced. It expects an argument of the type zend_string *. String lengths
in it are bound to the size_t datatype.
Integer types
Integers do no more depend on the firm 'long' type. Instead a platform
dependent integer type is used, it is called zend_long. That datatype is
defined dynamically to guarantee the consistent 64 bit support. The zval
field representing user land integer it bound to zend_long.
Signed integer is defined as zend_long, unsigned integer as zend_ulong
inside Zend.
Other datatypes
zend_off_t - portable off_t analogue
zend_stat_t - portable 'struct stat' analogue
These datatypes are declared to be portable across platforms. Thus, direct
usage of the functions like fseek, stat, etc. as well as direct usage of
off_t and struct stat is strongly not recommended. Instead the portable
macros should be used.
zend_fseek - portable fseek equivalent
zend_ftell - portable ftell equivalent
zend_lseek - portable lseek equivalent
zend_fstat - portable fstat equivalent
zend_stat - portable stat equivalent
f. zend_parse_parameters() specs
The new spec 'S' introduced, which expects an argument of type zend_string *.
The 'l' spec expects a parameter of the type zend_long, not long anymore.
The 's' spec expects parameters of the type char * and size_t, no int anymore.
g. sprintf() formats
New printf modifier 'p' was implemented to platform independently output zend_long,
zend_ulong and php_size_t datatypes. That modifier can be used with'd', 'u', 'x' and 'o'
printf format specs with spprintf, snprintf and the wrapping printf implementations.
%pu is sufficient for both zend_ulong and php_size_t. the code using %p spec to output
pointer address might need to be enclosed into #ifdef when it unlickily followed by 'd',
'u', 'x' or 'o'.
The only exceptions are the snprintf and zend_sprintf functions yet, because in some cases
they can use the implemenations available on the system, not the PHP one. Fro snprintf the
the macros ZEND_INT_FMT ZEND_UINT_FMT should be used.
h. HashTable API
Datatype for array indexes was changed to zend_ulong, for string keys to zend_string *.
i. New portable macros for large file support
Function(s) Alias Comment
stat, _stat64 zend_stat for use with zend_stat_t
fstat, _fstat64 zend_fstat for use with zend_stat_t
lseek, _lseeki64 zend_lseek for use with zend_off_t
ftell, _ftelli64 zend_ftell for use with zend_off_t
fseek, _fseeki64 zend_fseek for use with zend_off_t
j. New portable macros for integers
Function(s) Alias Comment
snprintf with "%ld" or "%lld", _ltoa_s, _i64toa_s ZEND_LTOA for use with zend_long
atol, atoll, _atoi64 ZEND_ATOL for use with zend_long
strtol, strtoll, _strtoi64 ZEND_STRTOL for use with zend_long
strtoul, strtoull, _strtoui64 ZEND_STRTOUL for use with zend_long
abs, llabs, _abs64 ZEND_ABS for use with zend_long
- ZEND_LONG_MAX replaces LONG_MAX where appropriate
- ZEND_LONG_MIN replaces LONG_MIN where appropriate
- ZEND_ULONG_MAX replaces ULONG_MAX where appropriate
- SIZEOF_ZEND_LONG reworked SIZEOF_ZEND_LONG representing the size of zend_long datatype
- ZEND_SIZE_MAX Max value of size_t
k. The get_class_entry object handler is no longer available. Instead
zend_object.ce is always used.
l. The get_class_name object handler is now only used for displaying class
names in debugging functions like var_dump(). It is no longer used in
get_class(), get_parent_class() or similar.
The handler is now obligatory, no longer accepts a `parent` argument and
must return a non-NULL zend_string*, which will be released by the caller.
========================
2. Build system changes
========================
a. Unix build system changes
b. Windows build system changes
- Besides Visual Studio, building with Clang or Intel Composer is now
possible. To enable an alternative toolset, add the option
--with-toolset=[vs,clang,icc] to the configure line. The default
toolset is vs. Still clang or icc need the correct environment
which involves many tools from the vs toolset.
AWARENESS The only recommended and supported toolset to produce production
ready binaries is Visual Studio. Still other compilers can be used now for
testing and analyzing purposes.