Struct LoadOptions 

pub struct LoadOptions {
    pub max_bytes: u64,
    pub max_line_len: usize,
    pub max_sv: usize,
    pub max_nr_class: usize,
    pub max_feature_index: i32,
}

Resource caps applied while reading LIBSVM problem and model files.

LIBSVM text formats are linear in file size, but individual fields (e.g. total_sv, feature indices, per-line token counts) can be used by a malicious file to trigger disproportionate allocation or CPU work. The Default impl returns defaults tuned for untrusted input:

Field	Default
max_bytes	64 MiB
max_line_len	1 MiB
max_sv	10 000 000
max_nr_class	65 535
max_feature_index	10 000 000

If you know the input is trusted (produced locally, read from an attestation-protected location, etc.) and you need to handle inputs larger than the defaults, call LoadOptions::trusted_input for an “unlimited” profile, or override specific fields:

use libsvm_rs::io::{load_problem_from_reader_with_options, LoadOptions};

let opts = LoadOptions {
    max_bytes: 1 << 30, // 1 GiB for a trusted bulk file
    ..LoadOptions::default()
};
let problem = load_problem_from_reader_with_options(reader, &opts)?;

Exceeding any cap returns an SvmError::ParseError (problem files) or SvmError::ModelFormatError (model files) with a message identifying the field that tripped the limit.

The default profile is intended to be panic-free for malformed text input within these caps. It is still a parser contract, not a semantic model audit: it does not verify that a loaded model came from a specific training set or that its predictions are appropriate for a deployment.

Fields

max_bytes: u64

Maximum total number of bytes read from the source.

max_line_len: usize

Maximum number of bytes in a single line (excluding the terminator).

max_sv: usize

Maximum value accepted for the total_sv header field in model files.

max_nr_class: usize

Maximum value accepted for the nr_class header field in model files.

max_feature_index: i32

Maximum feature index accepted in problem or model feature lists.

Implementations

impl LoadOptions

pub fn trusted_input() -> Self

Options with all caps set to the type maximum.

Use only for input that is fully trusted. Operating with unlimited caps removes the first line of defense against malformed or adversarial model / problem files. Module-level hard caps still apply to nr_class and total_sv.

Trait Implementations

impl Clone for LoadOptions

fn clone(&self) -> LoadOptions

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LoadOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for LoadOptions

fn default() -> Self

Returns the “default value” for a type.

impl Copy for LoadOptions