js Namespace

js:: Namespace

6 JavaScript/web-oriented functions: base64 encoding/decoding, URL encoding/decoding, parseInt with radix support, and JSON serialization.

See also: Namespaces Overview | Other namespaces

Base64

Function	Description	Example
btoa(result, input)	Base64 encode	js::btoa(encoded, s)
atob(result, input)	Base64 decode	js::atob(decoded, encoded)

URL Encoding

Function	Description	Example
encodeURIComponent(result, input)	URL-encode a string	js::encodeURIComponent(url, s)
decodeURIComponent(result, input)	URL-decode a string	js::decodeURIComponent(s, url)

Parsing

Function	Description	Example
parseInt(str, radix)	Parse integer with base (2-36)	n = js::parseInt(s, 16)

Common uses:

• js::parseInt(s, 16) — hexadecimal
• js::parseInt(s, 8) — octal
• js::parseInt(s, 2) — binary
• js::parseInt(s, 10) — decimal (explicit)

JSON

Function	Description	Example
stringify(result, arr)	Serialize array to JSON string	js::stringify(json, a)

Serializes a array to a JSON array string. String values are quoted and escaped, integers and doubles are bare.

Example

#include <iostream>

int main()
{
    // base64 round-trip
    string original = "Hello, World!";
    string encoded;
    string decoded;
    js::btoa(encoded, original);
    js::atob(decoded, encoded);
    cout << encoded << endl;    // SGVsbG8sIFdvcmxkIQ==
    cout << decoded << endl;    // Hello, World!

    // URL encoding
    string query = "name=John Doe&age=30";
    string url;
    js::encodeURIComponent(url, query);
    cout << url << endl;

    // hex parsing
    string hex = "ff";
    int n;
    n = js::parseInt(hex, 16);
    cout << n << endl;          // 255

    // JSON
    array data;
    php::array_push(data, "hello");
    php::array_push_int(data, 42);
    string json;
    js::stringify(json, data);
    cout << json << endl;       // ["hello",42]

    return 0;
}

← Back to Namespaces | ← Back to Home