php-i18n Digest 16 Feb 2006 09:13:28 -0000 Issue 310
Topics (messages 924 through 924):
Re: Ideas for a portable string api
924 by: Dmitry Stogov
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--- Begin Message ---
Hi,
After reviewing Marcus ideas, some experiments and speaking with Andrei.
I propose the following solutions:
1) We will not use any kind of unicode literals in C code (no L"foo" no
"f\0o\0o\0\0"),
Because L"" is not portable and "f\0.." looks to ugly.
2) We will change "zval" structure to make "zval.value.str.len" and
"zval.value.ustr.len" of the same type.
This will allow optimize Z_UNISTR() and Z_UNILEN() macros. They will
#define Z_UNISTR(z) ((void*)(Z_STRVAL(z)))
#define Z_UNILEN(z) ((void*)(Z_STRLEN(z)))
Instead of
#define Z_UNISTR(z) Z_TYPE(z)==IS_UNICODE?(char*)Z_USTRVAL(z):Z_STRVAL(z)
#define Z_UNILEN(z) Z_TYPE(z)==IS_UNICODE?(int)Z_USTRLEN(z):Z_STRLEN(z)
3) I don't like to break source compatibility with modification of "zval"
layout as Marcus suggested.
We will pass string/unicode values near in the same way as do today.
As three values - zend_uchar type, void* str, int len.
But we will create a set of the following macros to do it with less
overhead.
#define S_TYPE(x) _type_##x
#define S_UNIVAL(x) _val_##x
#define S_UNILEN(x) _len_##x
#define S_STRVAL(x) ((char*)S_UNIVAL(x))
#define S_USTRVAL(x) ((UChar*)S_UNIVAL(x))
#define S_STRLEN(x) S_UNILEN(x)
#define S_USTRLEN(x) S_UNILEN(x)
#define S_ARG(x) zend_uchar S_TYPE(x), void *S_UNIVAL(x), int
S_UNILEN(x)
#define S_PASS(x) S_TYPE(x), S_UNIVAL(x), S_UNILEN(x)
#define Z_STR_PASS(x) Z_TYPE(x), Z_UNIVAL(x), Z_UNILEN(x)
#define Z_STR_PASS_P(x) Z_TYPE_P(x), Z_UNIVAL_P(x), Z_UNILEN_P(x)
#define Z_STR_PASS_PP(x) Z_TYPE_PP(x), Z_UNIVAL_PP(x), Z_UNILEN_PP(x)
Then most zend_u_... Functions must be rewriten with these macros
Foe example:
ZEND_API int zend_u_lookup_class(S_ARG(name), zend_class_entry ***ce
TSRMLS_DC)
{
return zend_u_lookup_class_ex(S_PASS(name), 1, ce TSRMLS_CC);
}
Instead of
ZEND_API int zend_u_lookup_class(zend_uchar type, void *name, int
name_length, zend_class_entry ***ce TSRMLS_DC)
{
return zend_u_lookup_class_ex(type, name, name_length, 1, ce
TSRMLS_CC);
}
Any objections, additions?
Thanks. Dmitry.
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