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[ruby] * use static variable to avoid creating stirngs every time.

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* fix possible overflow.
This commit is contained in:
Takashi Tamura 2017-02-21 17:33:10 +09:00
commit e7eece9bcd
1 changed files with 16 additions and 14 deletions
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30
Lib/ruby/rubywstrings.swg
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@ -8,23 +8,23 @@
SWIGINTERN int
SWIG_AsWCharPtrAndSize(VALUE obj, wchar_t **cptr, size_t *psize, int *alloc)
{
static rb_encoding* wstr_enc = rb_to_encoding(rb_str_new_cstr( SWIG_RUBY_WSTRING_ENCODING ));
if (TYPE(obj) == T_STRING) {
VALUE tmp = rb_str_conv_enc(obj, rb_enc_get(obj),
rb_to_encoding(rb_str_new_cstr( SWIG_RUBY_WSTRING_ENCODING )) );
wchar_t* cstr = (wchar_t*) StringValuePtr(tmp);
size_t size = RSTRING_LEN(tmp) / sizeof(wchar_t) + 1;
VALUE rstr = rb_str_conv_enc(obj, rb_enc_get(obj), wstr_enc);
wchar_t* cstr = (wchar_t*) StringValuePtr(rstr);
size_t size = RSTRING_LEN(rstr) / sizeof(wchar_t) + 1;
if( RSTRING_LEN(tmp) % sizeof(wchar_t) != 0 ) {
if ( RSTRING_LEN(rstr) % sizeof(wchar_t) != 0 ) {
rb_raise(rb_eRuntimeError,
"The length of the byte sequence of converted string is not a multiplier of sizeof(wchar_t). Invalid byte sequence is given. Or invalid SWIG_RUBY_WSTRING_ENCODING is given when compiling this binding.");
}
if (cptr && alloc) {
*alloc = SWIG_NEWOBJ;
*cptr = %new_array(size, wchar_t);
memmove(*cptr, cstr, RSTRING_LEN(tmp));
memmove(*cptr, cstr, RSTRING_LEN(rstr));
}
if(psize) *psize = size;
if (psize) *psize = size;
return SWIG_OK;
} else {
@ -37,16 +37,18 @@ SWIG_AsWCharPtrAndSize(VALUE obj, wchar_t **cptr, size_t *psize, int *alloc)
SWIGINTERNINLINE VALUE
SWIG_FromWCharPtrAndSize(const wchar_t * carray, size_t size)
{
if (carray && size <= LONG_MAX) {
VALUE ret = rb_str_new( (const char*)carray, %numeric_cast(size*sizeof(wchar_t),long) );
static rb_encoding* wstr_enc = rb_to_encoding(rb_str_new_cstr( SWIG_RUBY_WSTRING_ENCODING ));
static rb_encoding* rb_enc = rb_to_encoding(rb_str_new_cstr( SWIG_RUBY_INTERNAL_ENCODING ));
if (carray && size <= LONG_MAX/sizeof(wchar_t)) {
VALUE rstr = rb_str_new( (const char*)carray, %numeric_cast(size*sizeof(wchar_t),long) );
rb_encoding* new_enc = rb_default_internal_encoding();
rb_enc_associate(ret, rb_to_encoding(rb_str_new_cstr( SWIG_RUBY_WSTRING_ENCODING )) );
if( !new_enc ) {
new_enc = rb_to_encoding(rb_str_new_cstr( SWIG_RUBY_INTERNAL_ENCODING ));
rb_enc_associate(rstr, wstr_enc);
if ( !new_enc ) {
new_enc = rb_enc;
}
return rb_str_conv_enc(ret, rb_enc_get(ret), new_enc);
return rb_str_conv_enc(rstr, wstr_enc, new_enc);
} else {
return Qnil;
}