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lemma/
limits.rs

1/// Limits to prevent abuse and enable predictable resource usage
2///
3/// These limits protect against malicious inputs while being generous enough
4/// for all legitimate use cases.
5#[derive(Debug, Clone)]
6pub struct ResourceLimits {
7    /// Maximum file size in bytes
8    /// Real usage: ~5KB, Limit: 5MB (1000x)
9    pub max_file_size_bytes: usize,
10
11    /// Maximum expression nesting depth
12    /// Real usage: ~3 levels, Limit: 100 (30x+)
13    pub max_expression_depth: usize,
14
15    /// Maximum size of a single fact value in bytes
16    /// Real usage: ~100 bytes, Limit: 1KB (10x)
17    /// Enables server pre-allocation for zero-allocation evaluation
18    pub max_fact_value_bytes: usize,
19}
20
21impl Default for ResourceLimits {
22    fn default() -> Self {
23        Self {
24            max_file_size_bytes: 5 * 1024 * 1024, // 5 MB
25            max_expression_depth: 100,
26            max_fact_value_bytes: 1024, // 1 KB
27        }
28    }
29}
30
31impl ResourceLimits {
32    /// Create a new ResourceLimits with default values
33    pub fn new() -> Self {
34        Self::default()
35    }
36}