Function parseEnvVarInt [src]

Parses an environment variable as an integer. Since the key is comptime-known, no allocation is needed. On Windows, key must be valid UTF-8.

Prototype

pub fn parseEnvVarInt(comptime key: []const u8, comptime I: type, base: u8) ParseEnvVarIntError!I

Parameters

key: []const u8I: typebase: u8

Possible Errors

EnvironmentVariableNotFound

InvalidCharacter ParseIntError

The input was empty or contained an invalid character

Overflow ParseIntError

The result cannot fit in the type specified

Source

  pub fn parseEnvVarInt(comptime key: []const u8, comptime I: type, base: u8) ParseEnvVarIntError!I {
    if (native_os == .windows) {
        const key_w = comptime std.unicode.utf8ToUtf16LeStringLiteral(key);
        const text = getenvW(key_w) orelse return error.EnvironmentVariableNotFound;
        return std.fmt.parseIntWithGenericCharacter(I, u16, text, base);
    } else if (native_os == .wasi and !builtin.link_libc) {
        @compileError("parseEnvVarInt is not supported for WASI without libc");
    } else {
        const text = posix.getenv(key) orelse return error.EnvironmentVariableNotFound;
        return std.fmt.parseInt(I, text, base);
    }
}  