58 lines
1.8 KiB
TypeScript
58 lines
1.8 KiB
TypeScript
// Copyright 2022 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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/** Parses CSV Database for easier lookups */
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export class TokenDatabase {
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private tokens: Map<number, string> = new Map();
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constructor(readonly csv: string) {
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this.parseTokensToTokensMap(csv.split(/\r?\n/));
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}
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has(token: number): boolean {
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return this.tokens.has(token);
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}
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get(token: number): string | undefined {
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return this.tokens.get(token);
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}
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private parseTokensToTokensMap(csv: string[]) {
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for (const [lineNumber, line] of Object.entries(
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csv.map(line => line.split(/,/))
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)) {
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if (!line[0] || !line[2]) {
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continue;
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}
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if (!/^[a-fA-F0-9]+$/.test(line[0])) {
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// Malformed number
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console.error(
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new Error(
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`TokenDatabase number ${line[0]} at line ` +
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`${lineNumber} is not a valid hex number`
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)
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);
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continue;
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}
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const tokenNumber = parseInt(line[0], 16);
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// To extract actual string value of a token number, we:
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// - Slice token number and whitespace that are in [0] and [1] of line.
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// - Join the rest as a string and trim the trailing quotes.
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const data = line.slice(2).join(',').slice(1, -1);
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this.tokens.set(tokenNumber, data);
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}
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}
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}
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