Rust

Demonstrates how to Handle Large Integers in JSON

See more JSON Examples

Demonstrates how to handle large integers in JSON. (Integers larger than what can fit in a 32-bit signed integer.) Rust

// Let's say your JSON has this:

// {
// 	"id": 20000000001234567
// }

let json = chilkat::JsonObject::new();

if json.load_file("qa_data/json/large_int.json").is_err() {
    println!("{}", json.last_error_text());
    return;
}

// The integer is too large for a 32-bit signed integer that is returned by IntOf.
// The result will be something that wrapped around and could be negative.
// In this case it would be: -543893881
let id = json.int_of("id");
println!("id: {}", id);

// The solution is to read the integer value as a string, and then use the features in your programming language
// to convert from a string to a 64-bit integer.
// 
// Alternatively, you may wish to simply hold the value as a string.  If, for example, the integer simply references
// an order ID, an account ID, etc., then there's no need to convert to an integer value.  You're not going to be doing
// mathematical operations on it anyway.  This is usually the case for large integers -- they typically exist
// in JSON as an account ID.

// You can get any JSON value as a string:
let account_id = json.string_of("id").unwrap_or_default();
println!("accountId: {}", account_id);

// Sample output:

// id: -543893881
// accountId: 20000000001234567