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utils.d
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126 lines (112 loc) · 2.92 KB
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module utils;
T orDefault(T)(T obj, lazy T default_) {
return obj == null ? default_ : obj;
}
import std.datetime: dur, SysTime;
auto stripMilliseconds(return SysTime time) {
time.fracSecs = dur!"msecs"(0);
return time;
}
string locale() {
import core.stdc.locale;
import std.string;
string locale = cast(string) setlocale(LC_CTYPE, null).fromStringz().split('@')[0].split('.')[0];
if (locale == "C" || locale == "POSIX") {
locale = "en_US";
}
return locale;
}
private struct Delegate(alias U)
{
import std.traits;
import std.typecons;
static if (is(typeof(&U) == delegate))
{
enum del = &U;
}
else
{
alias del = U;
}
typeof(del) delegate_ = del;
extern(C) static auto assemble(Parameters!U params, void* context)
{
return (cast(Delegate*) context).delegate_(params);
}
pragma(inline, true)
Tuple!(typeof(&assemble), void*) internalExpand()
{
return tuple(&assemble, cast(void*) &this);
}
alias expand = internalExpand.expand;
alias expand this;
// alias opCall = internalExpand.expand;
}
pragma(inline, true)
auto c(alias U)()
{
return new Delegate!U().internalExpand;
}
pragma(inline, true)
string toForwardSlashes(string s) {
version (Windows) {
char[] str = s.dup;
foreach (ref c; str) {
if (c == '\\') {
c = '/';
}
}
return cast(string) str;
} else {
return s;
}
}
auto maybeParallel(R)(R range, bool isMultithreaded) {
import std.parallelism;
import std.range.primitives;
struct RangeApplier {
R range;
this(R range) {
this.range = range;
}
int opApply(int delegate(size_t index, ElementType!R) dg) {
if (isMultithreaded) {
foreach (index, elem; range.parallel) {
int i = dg(index, elem);
if (i != 0) {
return i;
}
}
} else {
size_t index = 0;
foreach (ElementType!R elem; range) {
int i = dg(index, elem);
if (i != 0) {
return i;
}
index += 1;
}
}
return 0;
}
int opApply(int delegate(ElementType!R) dg) {
if (isMultithreaded) {
foreach (elem; range.parallel) {
int i = dg(elem);
if (i != 0) {
return i;
}
}
} else {
foreach (elem; range) {
int i = dg(elem);
if (i != 0) {
return i;
}
}
}
return 0;
}
}
return RangeApplier(range);
}