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uri: move hex2nibble() to util.h

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Daniel Eklöf 2022-01-02 18:28:10 +01:00
parent b8fc56ecb4
commit 1a91cbecc7
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2 changed files with 24 additions and 23 deletions
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22
util.h
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@ -35,3 +35,25 @@ sdbm_hash(const char *s)
return hash;
}
enum {
HEX_DIGIT_INVALID = 16
};
static inline uint8_t
hex2nibble(char c)
{
switch (c) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
return c - '0';
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
return c - 'a' + 10;
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
return c - 'A' + 10;
}
return HEX_DIGIT_INVALID;
}