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Begin unifying baseXX encodings. b64 / hex data strings can now be used with \` as well.

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This commit is contained in:
Christoffer Lerno
2024-11-25 16:20:10 +01:00
parent 9112d63655
commit a087ba608b
5 changed files with 56 additions and 52 deletions
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76
lib/std/encoding/hex.c3
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@@ -1,10 +1,11 @@
module std::encoding::hex;
import std::encoding @norecurse;
// The implementation is based on https://www.rfc-editor.org/rfc/rfc4648
fn String! encode_buffer(char[] code, char[] buffer)
fn String encode_buffer(char[] code, char[] buffer)
{
return (String)buffer[:encode_bytes(code, buffer)!];
return (String)buffer[:encode_bytes(code, buffer)];
}
fn char[]! decode_buffer(char[] code, char[] buffer)
@@ -12,10 +13,10 @@ fn char[]! decode_buffer(char[] code, char[] buffer)
return buffer[:decode_bytes(code, buffer)!];
}
fn String! encode(char[] code, Allocator allocator)
fn String encode(char[] code, Allocator allocator)
{
char[] data = allocator::alloc_array(allocator, char, encode_len(code.len));
return (String)data[:encode_bytes(code, data)!];
return (String)data[:encode_bytes(code, data)];
}
fn char[]! decode(char[] code, Allocator allocator)
@@ -24,16 +25,11 @@ fn char[]! decode(char[] code, Allocator allocator)
return data[:decode_bytes(code, data)!];
}
fn String! encode_new(char[] code) @inline => encode(code, allocator::heap());
fn String! encode_temp(char[] code) @inline => encode(code, allocator::temp());
fn String encode_new(char[] code) @inline => encode(code, allocator::heap());
fn String encode_temp(char[] code) @inline => encode(code, allocator::temp());
fn char[]! decode_new(char[] code) @inline => decode(code, allocator::heap());
fn char[]! decode_temp(char[] code) @inline => decode(code, allocator::temp());
fault Errors
{
INVALID_CHARACTER,
}
<*
Calculate the size of the encoded data.
@param n "Size of the input to be encoded."
@@ -48,10 +44,11 @@ fn usz encode_len(usz n) => n * 2;
@return "The encoded size."
@require dst.len >= encode_len(src.len) "Destination array is not large enough"
*>
fn usz! encode_bytes(char[] src, char[] dst)
fn usz encode_bytes(char[] src, char[] dst)
{
usz j = 0;
foreach (v : src) {
foreach (v : src)
{
dst[j] = HEXALPHABET[v >> 4];
dst[j + 1] = HEXALPHABET[v & 0x0f];
j = j + 2;
@@ -64,7 +61,7 @@ fn usz! encode_bytes(char[] src, char[] dst)
@param n "Size of the input to be decoded."
@return "The size of the input once decoded."
*>
fn usz decode_len(usz n) => n / 2;
macro usz decode_len(usz n) => n / 2;
<*
Decodes src into bytes. Returns the actual number of bytes written to dst.
@@ -76,21 +73,16 @@ fn usz decode_len(usz n) => n / 2;
@param dst "The decoded input."
@require src.len % 2 == 0 "src is not of even length"
@require dst.len >= decode_len(src.len) "Destination array is not large enough"
@return! Errors.INVALID_CHARACTER
@return! DecodingFailure.INVALID_CHARACTER
*>
fn usz! decode_bytes(char[] src, char[] dst)
{
usz i, j;
char a, b;
for (j = 1; j < src.len; j += 2) {
a = HEXREVERSE[src[j-1]];
b = HEXREVERSE[src[j]];
if (a > 0x0f) {
return Errors.INVALID_CHARACTER?;
}
if (b > 0x0f) {
return Errors.INVALID_CHARACTER?;
}
usz i;
for (usz j = 1; j < src.len; j += 2)
{
char a = HEXREVERSE[src[j - 1]];
char b = HEXREVERSE[src[j]];
if (a > 0x0f || b > 0x0f) return DecodingFailure.INVALID_CHARACTER?;
dst[i] = (a << 4) | b;
i++;
}
@@ -99,19 +91,19 @@ fn usz! decode_bytes(char[] src, char[] dst)
const char[*] HEXALPHABET @private = "0123456789abcdef";
const char[*] HEXREVERSE @private =
x"ffffffffffffffffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff"
x"00010203040506070809ffffffffffff"
x"ff0a0b0c0d0e0fffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff"
x"ff0a0b0c0d0e0fffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff"
x"ffffffffffffffffffffffffffffffff";
x`ffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffff
00010203040506070809ffffffffffff
ff0a0b0c0d0e0fffffffffffffffffff
ffffffffffffffffffffffffffffffff
ff0a0b0c0d0e0fffffffffffffffffff
ffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffff`;