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buffer: properly retrieve binary length of needle

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If the needle contains an extended latin-1 character then using
String::Utf8Length() will be too large and the search will return early.
Instead use String::Length() when encoding is BINARY.

PR-URL: https://github.com/nodejs/node/pull/4803
Reviewed-By: James M Snell <jasnell@gmail.com>
This commit is contained in:
Trevor Norris 2016-01-21 14:00:59 -07:00
parent 7240ad4441
commit 54cd2e1e5e
2 changed files with 12 additions and 1 deletions
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4
src/node_buffer.cc
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@ -849,7 +849,9 @@ void IndexOfString(const FunctionCallbackInfo<Value>& args) {
Local<String> needle = args[1].As<String>();
const char* haystack = ts_obj_data;
const size_t haystack_length = ts_obj_length;
const size_t needle_length = needle->Utf8Length();
// Extended latin-1 characters are 2 bytes in Utf8.
const size_t needle_length =
enc == BINARY ? needle->Length() : needle->Utf8Length();
if (needle_length == 0 || haystack_length == 0) {

9
test/parallel/test-buffer-indexof.js
View File

@ -109,6 +109,15 @@ assert.equal(
assert.equal(
Buffer(b.toString('binary'), 'binary')
.indexOf(Buffer('d', 'binary'), 0, 'binary'), 3);
assert.equal(
Buffer('aa\u00e8aa', 'binary')
.indexOf('\u00e8', 'binary'), 2);
assert.equal(
Buffer('\u00e8', 'binary')
.indexOf('\u00e8', 'binary'), 0);
assert.equal(
Buffer('\u00e8', 'binary')
.indexOf(Buffer('\u00e8', 'binary'), 'binary'), 0);
// test optional offset with passed encoding