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Add a char::to_digit function

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This commit is contained in:
Matt Brubeck 2011-10-31 07:34:58 -07:00 • committed by Marijn Haverbeke
parent 4739942e74
commit 80c926c5e2
5 changed files with 40 additions and 10 deletions
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9
src/lib/char.rs
View file

@ -93,3 +93,12 @@ pure fn is_whitespace(c: char) -> bool {
true
} else if c == ch_no_break_space { true } else { false }
}
pure fn to_digit(c: char) -> u8 {
alt c {
'0' to '9' { c as u8 - ('0' as u8) }
'a' to 'z' { c as u8 + 10u8 - ('a' as u8) }
'A' to 'Z' { c as u8 + 10u8 - ('A' as u8) }
_ { fail; }
}
}

6
src/lib/int.rs
View file

@ -112,11 +112,7 @@ fn parse_buf(buf: [u8], radix: uint) -> int {
}
let n = 0;
while true {
let digit = alt buf[i] as char {
'0' to '9' { buf[i] - ('0' as u8) }
'a' to 'z' { 10u8 + buf[i] - ('a' as u8) }
'A' to 'Z' { 10u8 + buf[i] - ('A' as u8) }
};
let digit = char::to_digit(buf[i] as char);
if (digit as uint) >= radix {
fail;
}

6
src/lib/uint.rs
View file

@ -100,11 +100,7 @@ fn parse_buf(buf: [u8], radix: uint) -> uint {
let power = 1u;
let n = 0u;
while true {
let digit = alt buf[i] as char {
'0' to '9' { buf[i] - ('0' as u8) }
'a' to 'z' { 10u8 + buf[i] - ('a' as u8) }
'A' to 'Z' { 10u8 + buf[i] - ('A' as u8) }
};
let digit = char::to_digit(buf[i] as char);
if (digit as uint) >= radix {
fail;
}