generated from sirlilpanda/kicad-project-template-actionless
52 lines
2.3 KiB
Zig
52 lines
2.3 KiB
Zig
const sys = @import("sys");
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// ---------------------------------------------------------------------------
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// CRC helpers — thin wrappers around the ESP-ROM implementations.
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//
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// All functions take a running `crc` (pass 0 for the first block) and a
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// data slice, and return the updated CRC value.
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//
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// Le = reflected polynomial (little-endian / standard CRC convention).
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// Be = non-reflected polynomial (big-endian convention).
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// ---------------------------------------------------------------------------
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// ── CRC-8 ─────────────────────────────────────────────────────────────────
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/// CRC-8 with reflected (little-endian) polynomial.
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pub fn crc8Le(crc: u8, buf: []const u8) u8 {
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return sys.esp_rom_crc8_le(crc, buf.ptr, buf.len);
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}
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/// CRC-8 with non-reflected (big-endian) polynomial.
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pub fn crc8Be(crc: u8, buf: []const u8) u8 {
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return sys.esp_rom_crc8_be(crc, buf.ptr, buf.len);
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}
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// ── CRC-16 ────────────────────────────────────────────────────────────────
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/// CRC-16 with reflected (little-endian) polynomial.
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pub fn crc16Le(crc: u16, buf: []const u8) u16 {
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return sys.esp_rom_crc16_le(crc, buf.ptr, buf.len);
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}
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/// CRC-16 with non-reflected (big-endian) polynomial.
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pub fn crc16Be(crc: u16, buf: []const u8) u16 {
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return sys.esp_rom_crc16_be(crc, buf.ptr, buf.len);
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}
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// ── CRC-32 ────────────────────────────────────────────────────────────────
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/// CRC-32 with reflected (little-endian) polynomial — compatible with
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/// zlib / Ethernet / standard CRC-32.
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pub fn crc32Le(crc: u32, buf: []const u8) u32 {
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return sys.esp_rom_crc32_le(crc, buf.ptr, buf.len);
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}
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/// CRC-32 with non-reflected (big-endian) polynomial.
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pub fn crc32Be(crc: u32, buf: []const u8) u32 {
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return sys.esp_rom_crc32_be(crc, buf.ptr, buf.len);
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}
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// ── Zig stdlib CRC (kept for pure-Zig use without ROM calls) ──────────────
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pub const zigCRC32 = @import("std").hash.crc;
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