locale_facets.tcc (collate<>::do_transform( const _CharT*, const _CharT*)): Simplify previous fix for libstdc++/28277, always allocate memory dynamically.
2006-07-11 Paolo Carlini <pcarlini@suse.de> * include/bits/locale_facets.tcc (collate<>::do_transform( const _CharT*, const _CharT*)): Simplify previous fix for libstdc++/28277, always allocate memory dynamically. From-SVN: r115356
This commit is contained in:
parent
ad084e9d07
commit
420644ea23
|
@ -1,3 +1,9 @@
|
|||
2006-07-11 Paolo Carlini <pcarlini@suse.de>
|
||||
|
||||
* include/bits/locale_facets.tcc (collate<>::do_transform(
|
||||
const _CharT*, const _CharT*)): Simplify previous fix for
|
||||
libstdc++/28277, always allocate memory dynamically.
|
||||
|
||||
2006-07-11 Paolo Carlini <pcarlini@suse.de>
|
||||
|
||||
PR libstdc++/28344
|
||||
|
|
|
@ -2457,28 +2457,18 @@ _GLIBCXX_END_LDBL_NAMESPACE
|
|||
{
|
||||
string_type __ret;
|
||||
|
||||
// Use alloca for an _M_transform temporary buffer up to an arbitrary,
|
||||
// but limited, asize, to avoid abusing the stack. Otherwise fall back
|
||||
// to dynamic memory allocation. This means splitting the computation
|
||||
// itself in hunks: a size <= 8k (thus <= 16k asize) appear sufficient
|
||||
// for optimal performance.
|
||||
const size_t __size = std::min(size_t(__hi - __lo), size_t(8192));
|
||||
const size_t __asize = 2 * __size;
|
||||
|
||||
size_t __len = __asize;
|
||||
|
||||
_CharT* __c =
|
||||
static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) * __len));
|
||||
|
||||
for (size_t __hunk = __size; __lo < __hi;
|
||||
__lo += __hunk, __hunk = std::min(size_t(__hi - __lo), __hunk))
|
||||
{
|
||||
// strxfrm assumes zero-terminated strings so we make a copy
|
||||
const string_type __str(__lo, __lo + __hunk);
|
||||
const string_type __str(__lo, __hi);
|
||||
|
||||
const _CharT* __p = __str.c_str();
|
||||
const _CharT* __pend = __str.data() + __hunk;
|
||||
const _CharT* __pend = __str.data() + __str.length();
|
||||
|
||||
size_t __len = (__hi - __lo) * 2;
|
||||
|
||||
_CharT* __c = new _CharT[__len];
|
||||
|
||||
try
|
||||
{
|
||||
// strxfrm stops when it sees a nul character so we break
|
||||
// the string into zero-terminated substrings and pass those
|
||||
// to strxfrm.
|
||||
|
@ -2490,9 +2480,8 @@ _GLIBCXX_END_LDBL_NAMESPACE
|
|||
// correct size.
|
||||
if (__res >= __len)
|
||||
{
|
||||
if (__len > __asize)
|
||||
delete [] __c;
|
||||
__len = __res + 1;
|
||||
delete [] __c, __c = 0;
|
||||
__c = new _CharT[__len];
|
||||
__res = _M_transform(__c, __p, __len);
|
||||
}
|
||||
|
@ -2506,8 +2495,12 @@ _GLIBCXX_END_LDBL_NAMESPACE
|
|||
__ret.push_back(_CharT());
|
||||
}
|
||||
}
|
||||
catch(...)
|
||||
{
|
||||
delete [] __c;
|
||||
__throw_exception_again;
|
||||
}
|
||||
|
||||
if (__len > __asize)
|
||||
delete [] __c;
|
||||
|
||||
return __ret;
|
||||
|
|
Loading…
Reference in New Issue