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hex improvements

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This commit is contained in:
Antoni Piasecki
2026-04-09 15:01:36 +02:00
parent a17ffa184a
commit 3fd4fcd062
3 changed files with 21 additions and 24 deletions
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41
src/std/std.zr
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@@ -273,10 +273,10 @@ func io.printf[..] : void
s = s + 1
if s[0] == 'd'
io.print_i64(_var_arg(i))
io.print_i64(_var_arg(i) as i64)
i = i + 1
else if s[0] == 'x'
io.print_i64_hex(_var_arg(i))
io.print_i64_hex(_var_arg(i) as i64)
i = i + 1
else if s[0] == 's'
io.print(_var_arg(i) as str)
@@ -670,41 +670,38 @@ func str.parse_i64[s: str] : i64
func str.hex_encode[s: str, s_len: i64] : str
let hex_chars: str = "0123456789abcdef"
let j = 0
let out: str = mem.alloc(s_len * 2 + 1) as str
for i in 0..s_len
let high: u8 = (s[i] >> 4) & 15
let low: u8 = s[i] & 15
out[j] = hex_chars[high]
out[j + 1] = hex_chars[low]
j = j + 2
let b: u8 = s[i]
out[i * 2] = hex_chars[(b >> 4) & 15]
out[i * 2 + 1] = hex_chars[b & 15]
out[j] = 0
out[s_len * 2] = 0
return out
func str._hex_digit_to_int[d: u8] : u8
if d >= 'a' && d <= 'f'
return d - 'a' + 10
if d >= 'A' && d <= 'F'
return d - 'A' + 10
return d - '0'
if d >= '0' && d <= '9'
return d - '0'
let lower: u8 = d | 32
if lower >= 'a' && lower <= 'f'
return lower - 'a' + 10
panic("invalid hex digit passed to str._hex_digit_to_int")
func str.hex_decode[s: str] : str
let s_len: i64 = str.len(s)
if s_len % 2 != 0
panic("invalid hex string passed to str.hex_decode")
let i = 0
let j = 0
let out: str = mem.alloc(s_len / 2 + 1) as str
let out_len: i64 = s_len / 2
let out: str = mem.alloc(out_len + 1) as str
while i < s_len
out[j] = str._hex_digit_to_int(s[i]) * 16 + str._hex_digit_to_int(s[i + 1])
i = i + 2
j = j + 1
for i in 0..out_len
let high: u8 = str._hex_digit_to_int(s[i * 2])
let low: u8 = str._hex_digit_to_int(s[i * 2 + 1])
out[i] = (high << 4) | low
out[j] = 0
out[out_len] = 0
return out
func math.gcd[a: i64, b: i64] : i64