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base64: simplify is_valid() by using reverse_lookup table

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This commit is contained in:
Craig Barnes 2020-08-08 03:55:23 +01:00
parent 42ba135dcb
commit 745aeba382
1 changed files with 2 additions and 5 deletions
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7
base64.c
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@ -37,12 +37,9 @@ static const char lookup[64] = {
};
static inline bool
is_valid(char c)
is_valid(unsigned char c)
{
return ((c >= 'A' && c <= 'Z') ||
(c >= 'a' && c <= 'z') ||
(c >= '0' && c <= '9') ||
c == '+' || c == '/' || c == '=');
return reverse_lookup[c] != 0 || c == 'A' || c == '=';
}
char *