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refactor(deps): Reduce the table size for the base64 decoding

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Julius Pfrommer
2025-01-02 23:41:14 +01:00
committed by Julius Pfrommer
parent 43aa78b6c5
commit b930774b0c
1 changed files with 3 additions and 11 deletions
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deps/base64.c
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+3 -11
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@@ -59,7 +59,7 @@ UA_base64_buf(const unsigned char *src, size_t len, unsigned char *out) {
return (size_t)(pos - out);
}
static unsigned char dtable[256] = {
static unsigned char dtable[128] = {
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 62 , 0x80, 62 , 0x80, 63 ,
@@ -67,15 +67,7 @@ static unsigned char dtable[256] = {
0x80, 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 , 0x80, 0x80, 0x80, 0x80, 63 ,
0x80, 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 , 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80
41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 0x80, 0x80, 0x80, 0x80, 0x80
};
unsigned char *
@@ -102,7 +94,7 @@ UA_unbase64(const unsigned char *src, size_t len, size_t *out_len) {
unsigned char block[4];
unsigned char *pos = out;
for(size_t i = 0; i < len; i++) {
unsigned char tmp = dtable[src[i]];
unsigned char tmp = dtable[src[i] & 0x07f];
if(tmp == 0x80)
goto error; /* Invalid input */