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core:encoding/base64: add support for url variant

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This commit is contained in:
rykad
2026-01-17 22:26:25 +00:00
parent d46c547264
commit 454f75cb22
2 changed files with 65 additions and 1 deletions
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49
core/encoding/base64/base64.odin
View File

@@ -24,6 +24,18 @@ ENC_TABLE := [64]byte {
'4', '5', '6', '7', '8', '9', '+', '/',
}
// Encoding table for Base64url variant
ENC_URL_TABLE := [64]byte {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3',
'4', '5', '6', '7', '8', '9', '-', '_',
}
PADDING :: '='
DEC_TABLE := [256]u8 {
@@ -61,6 +73,43 @@ DEC_TABLE := [256]u8 {
0, 0, 0, 0, 0, 0, 0, 0,
}
// Decoding table for Base64url variant
DEC_URL_TABLE := [256]u8 {
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 62, 0, 0,
52, 53, 54, 55, 56, 57, 58, 59,
60, 61, 0, 0, 0, 0, 0, 0,
0, 0, 1, 2, 3, 4, 5, 6,
7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22,
23, 24, 25, 0, 0, 0, 0, 63,
0, 26, 27, 28, 29, 30, 31, 32,
33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48,
49, 50, 51, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
}
encode :: proc(data: []byte, ENC_TBL := ENC_TABLE, allocator := context.allocator) -> (encoded: string, err: mem.Allocator_Error) #optional_allocator_error {
out_length := encoded_len(data)
if out_length == 0 {

17
tests/core/encoding/base64/base64.odin
View File

@@ -50,4 +50,19 @@ test_roundtrip :: proc(t: ^testing.T) {
for v, i in decoded {
testing.expect_value(t, v, values[i])
}
}
}
@(test)
test_base64url :: proc(t: ^testing.T) {
plain := ">>>"
url := "Pj4-"
encoded := base64.encode(transmute([]byte)plain, base64.ENC_URL_TABLE)
defer delete(encoded)
testing.expect_value(t, encoded, url)
decoded := string(base64.decode(url, base64.DEC_URL_TABLE))
defer delete(decoded)
testing.expect_value(t, decoded, plain)
}