/src/rt/util/string.d

 1/**
 2 * String manipulation and comparison utilities.
 3 *
 4 * Copyright: Copyright Sean Kelly 2005 - 2009.
 5 * License:   <a href="http://www.boost.org/LICENSE_1_0.txt">Boost License 1.0</a>.
 6 * Authors:   Sean Kelly
 7 */
 8
 9/*          Copyright Sean Kelly 2005 - 2009.
10 * Distributed under the Boost Software License, Version 1.0.
11 *    (See accompanying file LICENSE or copy at
12 *          http://www.boost.org/LICENSE_1_0.txt)
13 */
14module rt.util.string;
15
16private import core.stdc.string;
17
18@trusted:
19pure:
20nothrow:
21
22char[] uintToString( char[] buf, uint val )
23{
24    assert( buf.length > 9 );
25    auto p = buf.ptr + buf.length;
26
27    do
28    {
29        *--p = cast(char)(val % 10 + '0');
30    } while( val /= 10 );
31
32    return buf[p - buf.ptr .. $];
33}
34
35char[] uintToString( char[] buf, ulong val )
36{
37    assert( buf.length >= 20 );
38    auto p = buf.ptr + buf.length;
39
40    do
41    {
42        *--p = cast(char)(val % 10 + '0');
43    } while( val /= 10 );
44
45    return buf[p - buf.ptr .. $];
46}
47
48
49int dstrcmp( in char[] s1, in char[] s2 )
50{
51    int  ret = 0;
52    auto len = s1.length;
53    if( s2.length < len )
54        len = s2.length;
55    if( 0 != (ret = memcmp( s1.ptr, s2.ptr, len )) )
56        return ret;
57    return s1.length >  s2.length ? 1 :
58           s1.length == s2.length ? 0 : -1;
59}