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WebFreak001
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262
src/backend/mi_parse.ts
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262
src/backend/mi_parse.ts
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export interface MIInfo {
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token: number;
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outOfBandRecord: { isStream: boolean, type: string, asyncClass: string, output: [string, any][], content: string }[];
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resultRecords: { resultClass: string, results: [string, any][] };
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}
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export class MINode implements MIInfo {
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token: number;
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outOfBandRecord: { isStream: boolean, type: string, asyncClass: string, output: [string, any][], content: string }[];
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resultRecords: { resultClass: string, results: [string, any][] };
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constructor(token: number, info: { isStream: boolean, type: string, asyncClass: string, output: [string, any][], content: string }[], result: { resultClass: string, results: [string, any][] }) {
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this.token = token;
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this.outOfBandRecord = info;
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this.resultRecords = result;
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}
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record(path: string): any {
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if (!this.outOfBandRecord)
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return undefined;
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return MINode.valueOf(this.outOfBandRecord[0].output, path);
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}
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result(path: string): any {
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if (!this.resultRecords)
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return undefined;
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return MINode.valueOf(this.resultRecords.results, path);
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}
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static valueOf(start: any, path: string): any {
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if (!start)
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return undefined;
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let pathRegex = /^\.?([a-zA-Z_\-][a-zA-Z0-9_\-]*)/;
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let indexRegex = /^\[(\d+)\](?:$|\.)/;
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path = path.trim();
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if (!path)
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return start;
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let current = start;
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do {
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let target = pathRegex.exec(path);
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if (target) {
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path = path.substr(target[0].length);
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if (current.length && typeof current != "string") {
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let found = [];
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for (let i = 0; i < current.length; i++) {
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let element = current[i];
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if (element[0] == target[1]) {
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found.push(element[1]);
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}
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}
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if (found.length > 1) {
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current = found;
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} else if (found.length == 1) {
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current = found[0];
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} else return undefined;
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} else return undefined;
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}
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else if (path[0] == '@') {
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current = [current];
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path = path.substr(1);
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}
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else {
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target = indexRegex.exec(path);
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if (target) {
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path = path.substr(target[0].length);
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let i = parseInt(target[1]);
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if (current.length && typeof current != "string" && i >= 0 && i < current.length) {
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current = current[i];
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} else if (i == 0) {
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} else return undefined;
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}
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else return undefined;
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}
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path = path.trim();
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} while (path);
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return current;
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}
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}
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const tokenRegex = /^[0-9]+/;
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const outOfBandRecordRegex = /^(?:([0-9]*)([\*\+\=])|([\~\@\&]))/;
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const resultRecordRegex = /^([0-9]*)\^(done|running|connected|error|exit)/;
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const newlineRegex = /^\r\n?/;
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const endRegex = /^\(gdb\)\r\n?/;
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const variableRegex = /^([a-zA-Z_\-][a-zA-Z0-9_\-]*)/;
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const asyncClassRegex = /^(.*?),/;
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export function parseMI(output: string): MINode {
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/*
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output ==>
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(
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exec-async-output = [ token ] "*" ("stopped" | others) ( "," variable "=" (const | tuple | list) )* \n
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status-async-output = [ token ] "+" ("stopped" | others) ( "," variable "=" (const | tuple | list) )* \n
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notify-async-output = [ token ] "=" ("stopped" | others) ( "," variable "=" (const | tuple | list) )* \n
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console-stream-output = "~" c-string \n
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target-stream-output = "@" c-string \n
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log-stream-output = "&" c-string \n
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)*
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[
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[ token ] "^" ("done" | "running" | "connected" | "error" | "exit") ( "," variable "=" (const | tuple | list) )* \n
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]
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"(gdb)" \n
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*/
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let token = undefined;
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let outOfBandRecord = [];
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let resultRecords = undefined;
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let asyncRecordType = {
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"*": "exec",
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"+": "status",
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"=": "notify"
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};
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let streamRecordType = {
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"~": "console",
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"@": "target",
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"&": "log"
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};
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let parseCString = () => {
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if (output[0] != '"')
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return "";
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let stringEnd = 1;
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let inString = true;
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let remaining = output.substr(1);
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let escaped = false;
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while (inString) {
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if (escaped)
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escaped = false;
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else if (remaining[0] == '\\')
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escaped = true;
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else if (remaining[0] == '"')
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inString = false;
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remaining = remaining.substr(1);
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stringEnd++;
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}
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// hax
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let str = JSON.parse(output.substr(0, stringEnd));
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output = output.substr(stringEnd);
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return str;
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};
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let parseValue, parseCommaResult, parseCommaValue, parseResult;
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let parseTupleOrList = () => {
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if (output[0] != '{' && output[0] != '[')
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return undefined;
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let oldContent = output;
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let canBeValueList = output[0] == '[';
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output = output.substr(1);
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if (output[0] == '}' || output[0] == ']')
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return [];
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if (canBeValueList) {
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let value = parseValue();
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if (value) { // is value list
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let values = [];
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values.push(value);
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let remaining = output;
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while (value = parseCommaValue())
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values.push(value);
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output = output.substr(1); // ]
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return values;
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}
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}
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let result = parseResult();
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if (result) {
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let results = [];
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results.push(result);
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while (result = parseCommaResult())
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results.push(result);
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output = output.substr(1); // }
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return results;
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}
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output = (canBeValueList ? '[' : '{') + output;
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return undefined;
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};
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parseValue = () => {
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if (output[0] == '"')
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return parseCString();
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else if (output[0] == '{' || output[0] == '[')
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return parseTupleOrList();
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else
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return undefined;
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};
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parseResult = () => {
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let variableMatch = variableRegex.exec(output);
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if (!variableMatch)
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return undefined;
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output = output.substr(variableMatch[0].length + 1);
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let variable = variableMatch[1];
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return [variable, parseValue()];
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};
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parseCommaValue = () => {
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if (output[0] != ',')
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return undefined;
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output = output.substr(1);
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return parseValue();
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};
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parseCommaResult = () => {
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if (output[0] != ',')
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return undefined;
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output = output.substr(1);
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return parseResult();
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};
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let match = undefined;
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while (match = outOfBandRecordRegex.exec(output)) {
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output = output.substr(match[0].length);
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if (match[1] && token === undefined) {
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token = parseInt(match[1]);
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}
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if (match[2]) {
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let classMatch = asyncClassRegex.exec(output);
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output = output.substr(classMatch[1].length);
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let asyncRecord = {
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isStream: false,
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type: asyncRecordType[match[2]],
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asyncClass: classMatch[1],
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output: []
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};
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let result;
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while (result = parseCommaResult())
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asyncRecord.output.push(result);
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outOfBandRecord.push(asyncRecord);
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}
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else if (match[3]) {
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let streamRecord = {
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isStream: true,
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type: streamRecordType[match[3]],
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content: parseCString()
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};
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outOfBandRecord.push(streamRecord);
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}
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output = output.replace(newlineRegex, "");
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}
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if (match = resultRecordRegex.exec(output)) {
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output = output.substr(match[0].length);
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if (match[1] && token === undefined) {
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token = parseInt(match[1]);
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}
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resultRecords = {
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resultClass: match[2],
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results: []
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};
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let result;
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while (result = parseCommaResult())
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resultRecords.results.push(result);
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output = output.replace(newlineRegex, "");
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}
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return new MINode(token, outOfBandRecord || [], resultRecords);
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}
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