diff options
Diffstat (limited to 'js')
| -rw-r--r-- | js/flatbuffers.js | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/js/flatbuffers.js b/js/flatbuffers.js index 596da800..b1687b75 100644 --- a/js/flatbuffers.js +++ b/js/flatbuffers.js @@ -252,6 +252,7 @@ flatbuffers.Builder.prototype.clear = function() { this.vtables = []; this.vector_num_elems = 0; this.force_defaults = false; + this.string_maps = null; }; /** @@ -774,6 +775,28 @@ flatbuffers.Builder.prototype.endVector = function() { /// @endcond /** + * Encode the string `s` in the buffer using UTF-8. If the string passed has + * already been seen, we return the offset of the already written string + * + * @param {string|Uint8Array} s The string to encode + * @return {flatbuffers.Offset} The offset in the buffer where the encoded string starts + */ +flatbuffers.Builder.prototype.createSharedString = function(s) { + if (!s) { return 0 } + + if (!this.string_maps) { + this.string_maps = new Map(); + } + + if (this.string_maps.has(s)) { + return this.string_maps.get(s) + } + let offset = this.createString(s) + this.string_maps.set(s, offset) + return offset +} + +/** * Encode the string `s` in the buffer using UTF-8. If a Uint8Array is passed * instead of a string, it is assumed to contain valid UTF-8 encoded data. * @@ -781,6 +804,7 @@ flatbuffers.Builder.prototype.endVector = function() { * @return {flatbuffers.Offset} The offset in the buffer where the encoded string starts */ flatbuffers.Builder.prototype.createString = function(s) { + if (!s) { return 0 } if (s instanceof Uint8Array) { var utf8 = s; } else { |