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Minor tweaks to expand_Variables, fixes rare memory leak

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darcs-hash:20060207114857-ac50b-9b2ecf31106678ec35d888066162bf14605c6003.gz
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axel 2006-02-07 21:48:57 +10:00
parent c4dfdfa849
commit ddff3561e3
1 changed files with 68 additions and 56 deletions
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20
expand.c
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@ -713,6 +713,17 @@ static int expand_pid( wchar_t *in,
/** /**
Expand all environment variables in the string *ptr. Expand all environment variables in the string *ptr.
This function is slow, fragile and complicated. There are lots of
little corner cases, like $$foo should do a double expansion,
$foo$bar should not double expand bar, etc. Also, it's easy to
accidentally leak memory on array out of bounds errors an various
other situations. All in all, this function should be rewritten,
split out into multiple logical units and carefully tested. After
that, it can probably be optimized to do fewer memory allocations,
fewer string scans and overall just less work. But until that
happens, don't edit it unless you know exactly what you are doing,
and do proper testing afterwards.
*/ */
static int expand_variables( wchar_t *in, array_list_t *out ) static int expand_variables( wchar_t *in, array_list_t *out )
{ {
@ -885,6 +896,9 @@ static int expand_variables( wchar_t *in, array_list_t *out )
free( var_val ); free( var_val );
} }
if( is_ok )
{
if( is_single ) if( is_single )
{ {
string_buffer_t res; string_buffer_t res;
@ -908,10 +922,7 @@ static int expand_variables( wchar_t *in, array_list_t *out )
free( next ); free( next );
} }
sb_append( &res, &in[stop_pos] ); sb_append( &res, &in[stop_pos] );
is_ok &= expand_variables( wcsdup((wchar_t *)res.buff), out ); is_ok &= expand_variables( (wchar_t *)res.buff, out );
sb_destroy( &res );
} }
else else
{ {
@ -951,6 +962,7 @@ static int expand_variables( wchar_t *in, array_list_t *out )
free( next ); free( next );
} }
} }
}
al_destroy( &l ); al_destroy( &l );
al_destroy( &idx ); al_destroy( &idx );