timstableford / bsonpp Goto Github PK

Hi there,

I'm working on an embedded project to translate MIDI signals for vintage synthesizers. I need to send complex messages to the device to load/save settings. I initially rolled my own communication protocol for these messages, but that strategy won't scale, so I want to move to a standard data format like BSON, so I can spend less time on writing (de)serialization code.

I gave the bsonpp library a try, but I'm running into an issue. Here is an example message I want to send, in JSON format:

{
  "cmd": 1,
  "ctrl": {
    "rows": 2,
    "cols": 4,
    "ccs": [1, 2, 3, 4, 5, 6, 7, 8]
  },
  "outs": [
    {
      "pid": 1,
      "sid": 1,
      "mfg": "Roland",
      "syn": "Juno 60",
      "chn": 1,
      "ccs": [11, 12, 13, 14, 15, 16, 17, 18]
    }
  ]
}

I was able to parse the cmd and ctrl fields, but calling document.getKeyCount() returns BSONPP_INCORRECT_TYPE. Attempting to parse the outs field also fails.

I simplified the message down to narrow down the issue. It looks like having any keys after a sub-document will cause these issues.

For example, bsonpp fails to parse the last field value on this simpler document:

{
  "cmd": 1,
  "ctrl": {
    "rows": 2,
    "cols": 4
  },
  "last": 42
}

Hopefully this is enough info to repro the issue. Thanks for your work on this library!