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Path Set parsing function (not tested yet)

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jatchili
2013-07-31 19:18:42 -07:00
parent 78b1e4f570
commit 3ea426d45f
1 changed files with 49 additions and 11 deletions
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60
src/js/ripple/serializedtypes.js
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@@ -128,10 +128,6 @@ var STInt8 = exports.Int8 = new SerializedType({
var STInt16 = exports.Int16 = new SerializedType({
serialize: function (so, val) {
append_byte_array(so, val, 2);
/*so.append([
val >>> 8 & 0xff,
val & 0xff
]);*/
},
parse: function (so) {
return readAndSum(so, 2);
@@ -141,12 +137,6 @@ var STInt16 = exports.Int16 = new SerializedType({
var STInt32 = exports.Int32 = new SerializedType({
serialize: function (so, val) {
append_byte_array(so, val, 4)
/*so.append([
val >>> 24 & 0xff,
val >>> 16 & 0xff,
val >>> 8 & 0xff,
val & 0xff
]);*/
},
parse: function (so) {
return readAndSum(so, 4);
@@ -434,7 +424,55 @@ var STPathSet = exports.PathSet = new SerializedType({
},
parse: function (so) {
// XXX
throw new Error("Parsing PathSet not implemented");
// should return a list of lists:
/*
[
[entry, entry],
[entry, entry, entry]
[entry]
[]
]
each entry has one or more of the following attributes: amount, currency, issuer.
*/
var path_list = [];
var current_path = [];
while (true) { //TODO: try/catch this loop, and catch when we run out of data without reaching the end of the data structure.
var tag_byte = so.read(1)[0];
//Now determine: is this an end, boundary, or entry-begin-tag?
if (tag_byte == typeEnd) { //We're done.
if (current_path) { //close the current path, if there is one,
path_list.push(current_path);
}
break; //and conclude.
} else if (tag_byte == typeBoundary {
if (current_path) { //close the current path, if there is one,
path_list.push(current_path);
}
current_path = []; //and start a new one.
} else {
//It's an entry-begin tag.
var entry = {};
if (tag_byte & typeAccount) {
entry.account = STAccount.parse(so.read(20))
}
if (tag_byte & typeCurrency) {
entry.currency = STCurrency.parse(so.read(20))
}
if (tag_byte & typeIssuer) {
entry.issuer = UInt160.parse(so.read(20)); //should know to use Base58?
}
if (entry.account || entry.currency || entry.issuer) {
current_path.push(entry);
} else {
throw new Error("Invalid path entry"); //It must have at least something in it.
}
}
}
return path_list;
}
});