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use crate::arch::Arch;

pub trait InstructionAnalysis: Arch {
    /// Caller guarantees pc_offset <= text_bytes.len()
    fn rule_from_prologue_analysis(text_bytes: &[u8], pc_offset: usize)
        -> Option<Self::UnwindRule>;

    /// Caller guarantees pc_offset <= text_bytes.len()
    fn rule_from_epilogue_analysis(text_bytes: &[u8], pc_offset: usize)
        -> Option<Self::UnwindRule>;

    /// Caller guarantees pc_offset <= text_bytes.len()
    fn rule_from_instruction_analysis(
        text_bytes: &[u8],
        pc_offset: usize,
    ) -> Option<Self::UnwindRule> {
        Self::rule_from_prologue_analysis(text_bytes, pc_offset)
            .or_else(|| Self::rule_from_epilogue_analysis(text_bytes, pc_offset))
    }
}