Enum CodeSegmentHeader 

pub enum CodeSegmentHeader {
    MpwFar,
    Near {
        table_offset: u16,
        entry_count: u16,
    },
    ThinkFar {
        has_relocations: bool,
        first_entry_index: u16,
        entry_count: u16,
    },
}

Header stored at the front of each nonzero CODE resource.

MPW-style near segments use the documented tabOff, nEntries format. Symantec/THINK far CODE uses the same four bytes differently: word 0 stores the first jump-table entry index plus the relocation flag, and word 1 has bit $4000 set plus the entry count.

Variants

MpwFar

MPW far-model segment with a 40-byte header ($FFFF marker).

Near

Standard near-model segment: byte offset from the current jump table base, plus number of entries owned by the segment.

Fields

table_offset: u16

entry_count: u16

ThinkFar

Symantec/THINK far CODE segment.

Fields

has_relocations: bool

first_entry_index: u16

entry_count: u16

Implementations

impl CodeSegmentHeader

pub fn parse(data: &[u8]) -> Option<Self>

pub fn from_words(first: u16, second: u16) -> Self

pub fn code_header_size(self) -> u32

pub fn jump_table_start_offset(self) -> Option<u32>

pub fn jump_table_entry_count(self) -> Option<u32>

Trait Implementations

impl Clone for CodeSegmentHeader

fn clone(&self) -> CodeSegmentHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CodeSegmentHeader

impl Debug for CodeSegmentHeader

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

Formats the value using the given formatter.

impl Eq for CodeSegmentHeader

impl PartialEq for CodeSegmentHeader

fn eq(&self, other: &CodeSegmentHeader) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CodeSegmentHeader