buffer: fix UCS2 indexOf for odd buffer length
Fix `buffer.indexOf` for the case that the haystack has odd length and the needle is not found in it. `StringSearch()` would return the length of the buffer in multiples of `sizeof(uint16_t)`, but checking that against `haystack_length` would not work if the latter one was odd. PR-URL: https://github.com/nodejs/node/pull/6511 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Trevor Norris <trev.norris@gmail.com>
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@ -994,7 +994,9 @@ void IndexOfString(const FunctionCallbackInfo<Value>& args) {
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bool is_forward = args[4]->IsTrue();
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bool is_forward = args[4]->IsTrue();
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const char* haystack = ts_obj_data;
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const char* haystack = ts_obj_data;
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const size_t haystack_length = ts_obj_length;
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// Round down to the nearest multiple of 2 in case of UCS2.
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const size_t haystack_length = (enc == UCS2) ?
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ts_obj_length &~ 1 : ts_obj_length; // NOLINT(whitespace/operators)
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const size_t needle_length =
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const size_t needle_length =
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StringBytes::Size(args.GetIsolate(), needle, enc);
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StringBytes::Size(args.GetIsolate(), needle, enc);
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@ -228,6 +228,9 @@ assert.strictEqual(Buffer.from('aaaa').indexOf('a'.repeat(4), 'ucs2'), -1);
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assert.strictEqual(Buffer.from('aaaa').indexOf('a'.repeat(4), 'utf8'), 0);
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assert.strictEqual(Buffer.from('aaaa').indexOf('a'.repeat(4), 'utf8'), 0);
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assert.strictEqual(Buffer.from('aaaa').indexOf('你好', 'ucs2'), -1);
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assert.strictEqual(Buffer.from('aaaa').indexOf('你好', 'ucs2'), -1);
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// Haystack has odd length, but the needle is UCS2.
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assert.strictEqual(Buffer.from('aaaaa').indexOf('b', 'ucs2'), -1);
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{
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{
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// Find substrings in Utf8.
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// Find substrings in Utf8.
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const lengths = [1, 3, 15]; // Single char, simple and complex.
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const lengths = [1, 3, 15]; // Single char, simple and complex.
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