N0VA/foferk
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Update main.v

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N0\A
2026-07-12 13:14:44 +02:00
parent 02f291a12b
commit 1d04de4002
1 changed files with 73 additions and 28 deletions
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main.v
+63 -18
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@@ -3,8 +3,9 @@ import os
// BITS // BITS
struct Bits { struct Bits {
mut: mut:
bytes []u8 file os.File
buffer []u8
current u8 current u8
count u8 count u8
} }
@@ -13,14 +14,18 @@ fn write(mut b Bits, value u8) {
b.current = b.current | ((value & 1) << b.count) b.current = b.current | ((value & 1) << b.count)
b.count++ b.count++
if b.count == 8 { if b.count == 8 {
b.bytes << b.current b.buffer << b.current
if b.buffer.len >= 1048576 {
b.file.write(b.buffer) or { panic(err) }
b.buffer.clear()
}
b.current = 0 b.current = 0
b.count = 0 b.count = 0
} }
} }
fn write_lsb(mut b Bits, value u8, length u8) { fn write_lsb(mut b Bits, value u8, length u8) {
for i in 0..length { for i in 0 .. length {
write(mut b, (value >> i) & 1) write(mut b, (value >> i) & 1)
} }
} }
@@ -35,7 +40,11 @@ fn write_msb(mut b Bits, code u16, length u16) {
fn flush(mut b Bits) { fn flush(mut b Bits) {
if b.count > 0 { if b.count > 0 {
b.bytes << b.current b.buffer << b.current
if b.buffer.len >= 1048576 {
b.file.write(b.buffer) or { panic(err) }
b.buffer.clear()
}
b.current = 0 b.current = 0
b.count = 0 b.count = 0
} }
@@ -43,7 +52,11 @@ fn flush(mut b Bits) {
fn write_byte(mut b Bits, value u8) { fn write_byte(mut b Bits, value u8) {
flush(mut b) flush(mut b)
b.bytes << value b.buffer << value
if b.buffer.len >= 1048576 {
b.file.write(b.buffer) or { panic(err) }
b.buffer.clear()
}
} }
fn write_u32(mut b Bits, value u32) { fn write_u32(mut b Bits, value u32) {
@@ -83,8 +96,13 @@ fn write_foferk(mut b Bits) {
write_msb(mut b, 0x50, 8) // ' ' + 30 write_msb(mut b, 0x50, 8) // ' ' + 30
} }
fn write_tokens(mut b Bits, repeat int) { fn write_tokens(mut b Bits, repeat i64) {
mut remaining := (repeat - 1) * 7 mut remaining := (repeat - 1) * 7
total := remaining
mut next_log := i64(0)
mut written := i64(0)
log_step := if total / 10000 == 0 { i64(1) } else { total / 10000 }
for remaining >= 252 { for remaining >= 252 {
write_msb(mut b, 0xC4, 8) write_msb(mut b, 0xC4, 8)
@@ -92,6 +110,14 @@ fn write_tokens(mut b Bits, repeat int) {
write_msb(mut b, 0x05, 5) write_msb(mut b, 0x05, 5)
write_lsb(mut b, 0x00, 1) write_lsb(mut b, 0x00, 1)
remaining -= 252 remaining -= 252
written += 252
if written >= next_log {
percent := f64(written) / f64(total) * 100.0
print('\r${percent:6.2f}% foferk')
os.flush()
next_log += log_step
}
} }
for remaining >= 7 { for remaining >= 7 {
@@ -118,23 +144,24 @@ fn write_tokens(mut b Bits, repeat int) {
write_msb(mut b, 0x05, 5) write_msb(mut b, 0x05, 5)
write_lsb(mut b, 0x00, 1) write_lsb(mut b, 0x00, 1)
} }
println('\r100.00% foferk')
} }
fn write_footer(mut b Bits, repeat int) { fn write_footer(mut b Bits, repeat i64) {
write_msb(mut b, 0x00, 7) write_msb(mut b, 0x00, 7)
flush(mut b) flush(mut b)
write_u32(mut b, crc32(repeat)) write_u32(mut b, crc32(repeat))
write_u32(mut b, u32(repeat * 7)) write_u32(mut b, u32(u64(repeat * 7) & 0xFFFFFFFF))
} }
// CRC32 // CRC32
fn crc32(repeat int) u32 { fn crc32(repeat i64) u32 {
mut table := []u32{len: 256} mut table := []u32{len: 256}
for i in 0..256 { for i in 0 .. 256 {
mut c := u32(i) mut c := u32(i)
for _ in 0..8 { for _ in 0 .. 8 {
if (c & 1) != 0 { if (c & 1) != 0 {
c = 0xEDB88320 ^ (c >> 1) c = 0xEDB88320 ^ (c >> 1)
} else { } else {
@@ -145,18 +172,33 @@ fn crc32(repeat int) u32 {
} }
mut crc := u32(0xffffffff) mut crc := u32(0xffffffff)
for _ in 0..repeat { mut next_log := i64(0)
for byte in "foferk ".bytes() { log_step := if repeat / 10000 == 0 { i64(1) } else { repeat / 10000 }
for i in 0 .. repeat {
for byte in 'foferk '.bytes() {
crc = table[(crc ^ u32(byte)) & 0xFF] ^ (crc >> 8) crc = table[(crc ^ u32(byte)) & 0xFF] ^ (crc >> 8)
} }
if i >= next_log {
percent := f64(i) / f64(repeat) * 100.0
print('\rChecksum: ${percent:6.2f}%')
os.flush()
next_log += log_step
} }
}
println('\rChecksum: 100.00%')
return crc ^ 0xffffffff return crc ^ 0xffffffff
} }
fn main() { fn main() {
repeat := 1_000_000 repeat := i64(1_000_000)
mut b := Bits {
bytes: []u8{} mut file := os.create('foferk.gz') or { panic(err) }
mut b := Bits{
file: file
buffer: []u8{cap: 1048576}
current: 0 current: 0
count: 0 count: 0
} }
@@ -167,5 +209,8 @@ fn main() {
write_tokens(mut b, repeat) write_tokens(mut b, repeat)
write_footer(mut b, repeat) write_footer(mut b, repeat)
os.write_bytes("foferk.gz", b.bytes)! if b.buffer.len > 0 {
b.file.write(b.buffer) or { panic(err) }
}
file.close()
} }