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doc: fix tutorial unsafe blocks, r=burningtree.

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This commit is contained in:
Graydon Hoare 2013-01-23 23:21:47 -08:00
parent 07d0af151a
commit e8f4da78e7
1 changed files with 17 additions and 12 deletions
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29
doc/tutorial-ffi.md
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@ -26,11 +26,14 @@ fn as_hex(data: ~[u8]) -> ~str {
return acc;
}
fn sha1(data: ~str) -> ~str unsafe {
let bytes = str::to_bytes(data);
let hash = crypto::SHA1(vec::raw::to_ptr(bytes),
vec::len(bytes) as c_uint, ptr::null());
return as_hex(vec::from_buf(hash, 20));
fn sha1(data: ~str) -> ~str {
unsafe {
let bytes = str::to_bytes(data);
let hash = crypto::SHA1(vec::raw::to_ptr(bytes),
vec::len(bytes) as c_uint,
ptr::null());
return as_hex(vec::from_buf(hash, 20));
}
}
fn main() {
@ -225,13 +228,15 @@ struct timeval {
extern mod lib_c {
fn gettimeofday(tv: *timeval, tz: *()) -> i32;
}
fn unix_time_in_microseconds() -> u64 unsafe {
let x = timeval {
mut tv_sec: 0 as c_ulonglong,
mut tv_usec: 0 as c_ulonglong
};
lib_c::gettimeofday(ptr::addr_of(&x), ptr::null());
return (x.tv_sec as u64) * 1000_000_u64 + (x.tv_usec as u64);
fn unix_time_in_microseconds() -> u64 {
unsafe {
let x = timeval {
mut tv_sec: 0 as c_ulonglong,
mut tv_usec: 0 as c_ulonglong
};
lib_c::gettimeofday(ptr::addr_of(&x), ptr::null());
return (x.tv_sec as u64) * 1000_000_u64 + (x.tv_usec as u64);
}
}
# fn main() { assert fmt!("%?", unix_time_in_microseconds()) != ~""; }