45 lines
1.0 KiB
Zig
45 lines
1.0 KiB
Zig
const std = @import("std");
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const Allocator = std.mem.Allocator;
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const Self = @This();
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buf: []u8,
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alloc: Allocator,
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pub fn init(alloc: Allocator) !Self {
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return Self{
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.buf = try alloc.alloc(u8, 0x40000),
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.alloc = alloc,
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};
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}
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pub fn deinit(self: Self) void {
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self.alloc.free(self.buf);
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}
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pub fn get32(self: *const Self, idx: usize) u32 {
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return (@as(u32, self.get16(idx + 2)) << 16) | @as(u32, self.get16(idx));
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}
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pub fn set32(self: *Self, idx: usize, word: u32) void {
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self.set16(idx + 2, @truncate(u16, word >> 16));
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self.set16(idx, @truncate(u16, word));
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}
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pub fn get16(self: *const Self, idx: usize) u16 {
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return (@as(u16, self.buf[idx + 1]) << 8) | @as(u16, self.buf[idx]);
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}
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pub fn set16(self: *Self, idx: usize, halfword: u16) void {
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self.buf[idx + 1] = @truncate(u8, halfword >> 8);
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self.buf[idx] = @truncate(u8, halfword);
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}
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pub fn get8(self: *const Self, idx: usize) u8 {
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return self.buf[idx];
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}
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pub fn set8(self: *Self, idx: usize, byte: u8) void {
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self.buf[idx] = byte;
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}
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