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| author | Andrew Kelley <superjoe30@gmail.com> | 2018-06-01 11:49:25 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-06-01 11:49:25 -0400 |
| commit | 3918e7699db07540d59aeef7728e5dff54d9e874 (patch) | |
| tree | 5ccfd67157be19b745c469e923ed92691670b6e9 /std/sort.zig | |
| parent | 717ac85a5acb5e6ae063c4d0eb3b8f1bd260776a (diff) | |
| parent | e29d12d8218c6f84d4fd59b7c8672d3b38c79390 (diff) | |
| download | zig-3918e7699db07540d59aeef7728e5dff54d9e874.tar.gz zig-3918e7699db07540d59aeef7728e5dff54d9e874.zip | |
Merge pull request #1032 from ziglang/pointer-reform
use * for pointer type instead of &
Diffstat (limited to 'std/sort.zig')
| -rw-r--r-- | std/sort.zig | 54 |
1 files changed, 27 insertions, 27 deletions
diff --git a/std/sort.zig b/std/sort.zig index 4e17718241..1b44c18dd9 100644 --- a/std/sort.zig +++ b/std/sort.zig @@ -5,7 +5,7 @@ const math = std.math; const builtin = @import("builtin"); /// Stable in-place sort. O(n) best case, O(pow(n, 2)) worst case. O(1) memory (no allocator required). -pub fn insertionSort(comptime T: type, items: []T, lessThan: fn (lhs: &const T, rhs: &const T) bool) void { +pub fn insertionSort(comptime T: type, items: []T, lessThan: fn (lhs: *const T, rhs: *const T) bool) void { { var i: usize = 1; while (i < items.len) : (i += 1) { @@ -30,7 +30,7 @@ const Range = struct { }; } - fn length(self: &const Range) usize { + fn length(self: *const Range) usize { return self.end - self.start; } }; @@ -58,12 +58,12 @@ const Iterator = struct { }; } - fn begin(self: &Iterator) void { + fn begin(self: *Iterator) void { self.numerator = 0; self.decimal = 0; } - fn nextRange(self: &Iterator) Range { + fn nextRange(self: *Iterator) Range { const start = self.decimal; self.decimal += self.decimal_step; @@ -79,11 +79,11 @@ const Iterator = struct { }; } - fn finished(self: &Iterator) bool { + fn finished(self: *Iterator) bool { return self.decimal >= self.size; } - fn nextLevel(self: &Iterator) bool { + fn nextLevel(self: *Iterator) bool { self.decimal_step += self.decimal_step; self.numerator_step += self.numerator_step; if (self.numerator_step >= self.denominator) { @@ -94,7 +94,7 @@ const Iterator = struct { return (self.decimal_step < self.size); } - fn length(self: &Iterator) usize { + fn length(self: *Iterator) usize { return self.decimal_step; } }; @@ -108,7 +108,7 @@ const Pull = struct { /// Stable in-place sort. O(n) best case, O(n*log(n)) worst case and average case. O(1) memory (no allocator required). /// Currently implemented as block sort. -pub fn sort(comptime T: type, items: []T, lessThan: fn (lhs: &const T, rhs: &const T) bool) void { +pub fn sort(comptime T: type, items: []T, lessThan: fn (lhs: *const T, rhs: *const T) bool) void { // Implementation ported from https://github.com/BonzaiThePenguin/WikiSort/blob/master/WikiSort.c var cache: [512]T = undefined; @@ -741,7 +741,7 @@ pub fn sort(comptime T: type, items: []T, lessThan: fn (lhs: &const T, rhs: &con } // merge operation without a buffer -fn mergeInPlace(comptime T: type, items: []T, A_arg: &const Range, B_arg: &const Range, lessThan: fn (&const T, &const T) bool) void { +fn mergeInPlace(comptime T: type, items: []T, A_arg: *const Range, B_arg: *const Range, lessThan: fn (*const T, *const T) bool) void { if (A_arg.length() == 0 or B_arg.length() == 0) return; // this just repeatedly binary searches into B and rotates A into position. @@ -783,7 +783,7 @@ fn mergeInPlace(comptime T: type, items: []T, A_arg: &const Range, B_arg: &const } // merge operation using an internal buffer -fn mergeInternal(comptime T: type, items: []T, A: &const Range, B: &const Range, lessThan: fn (&const T, &const T) bool, buffer: &const Range) void { +fn mergeInternal(comptime T: type, items: []T, A: *const Range, B: *const Range, lessThan: fn (*const T, *const T) bool, buffer: *const Range) void { // whenever we find a value to add to the final array, swap it with the value that's already in that spot // when this algorithm is finished, 'buffer' will contain its original contents, but in a different order var A_count: usize = 0; @@ -819,7 +819,7 @@ fn blockSwap(comptime T: type, items: []T, start1: usize, start2: usize, block_s // combine a linear search with a binary search to reduce the number of comparisons in situations // where have some idea as to how many unique values there are and where the next value might be -fn findFirstForward(comptime T: type, items: []T, value: &const T, range: &const Range, lessThan: fn (&const T, &const T) bool, unique: usize) usize { +fn findFirstForward(comptime T: type, items: []T, value: *const T, range: *const Range, lessThan: fn (*const T, *const T) bool, unique: usize) usize { if (range.length() == 0) return range.start; const skip = math.max(range.length() / unique, usize(1)); @@ -833,7 +833,7 @@ fn findFirstForward(comptime T: type, items: []T, value: &const T, range: &const return binaryFirst(T, items, value, Range.init(index - skip, index), lessThan); } -fn findFirstBackward(comptime T: type, items: []T, value: &const T, range: &const Range, lessThan: fn (&const T, &const T) bool, unique: usize) usize { +fn findFirstBackward(comptime T: type, items: []T, value: *const T, range: *const Range, lessThan: fn (*const T, *const T) bool, unique: usize) usize { if (range.length() == 0) return range.start; const skip = math.max(range.length() / unique, usize(1)); @@ -847,7 +847,7 @@ fn findFirstBackward(comptime T: type, items: []T, value: &const T, range: &cons return binaryFirst(T, items, value, Range.init(index, index + skip), lessThan); } -fn findLastForward(comptime T: type, items: []T, value: &const T, range: &const Range, lessThan: fn (&const T, &const T) bool, unique: usize) usize { +fn findLastForward(comptime T: type, items: []T, value: *const T, range: *const Range, lessThan: fn (*const T, *const T) bool, unique: usize) usize { if (range.length() == 0) return range.start; const skip = math.max(range.length() / unique, usize(1)); @@ -861,7 +861,7 @@ fn findLastForward(comptime T: type, items: []T, value: &const T, range: &const return binaryLast(T, items, value, Range.init(index - skip, index), lessThan); } -fn findLastBackward(comptime T: type, items: []T, value: &const T, range: &const Range, lessThan: fn (&const T, &const T) bool, unique: usize) usize { +fn findLastBackward(comptime T: type, items: []T, value: *const T, range: *const Range, lessThan: fn (*const T, *const T) bool, unique: usize) usize { if (range.length() == 0) return range.start; const skip = math.max(range.length() / unique, usize(1)); @@ -875,7 +875,7 @@ fn findLastBackward(comptime T: type, items: []T, value: &const T, range: &const return binaryLast(T, items, value, Range.init(index, index + skip), lessThan); } -fn binaryFirst(comptime T: type, items: []T, value: &const T, range: &const Range, lessThan: fn (&const T, &const T) bool) usize { +fn binaryFirst(comptime T: type, items: []T, value: *const T, range: *const Range, lessThan: fn (*const T, *const T) bool) usize { var start = range.start; var end = range.end - 1; if (range.start >= range.end) return range.end; @@ -893,7 +893,7 @@ fn binaryFirst(comptime T: type, items: []T, value: &const T, range: &const Rang return start; } -fn binaryLast(comptime T: type, items: []T, value: &const T, range: &const Range, lessThan: fn (&const T, &const T) bool) usize { +fn binaryLast(comptime T: type, items: []T, value: *const T, range: *const Range, lessThan: fn (*const T, *const T) bool) usize { var start = range.start; var end = range.end - 1; if (range.start >= range.end) return range.end; @@ -911,7 +911,7 @@ fn binaryLast(comptime T: type, items: []T, value: &const T, range: &const Range return start; } -fn mergeInto(comptime T: type, from: []T, A: &const Range, B: &const Range, lessThan: fn (&const T, &const T) bool, into: []T) void { +fn mergeInto(comptime T: type, from: []T, A: *const Range, B: *const Range, lessThan: fn (*const T, *const T) bool, into: []T) void { var A_index: usize = A.start; var B_index: usize = B.start; const A_last = A.end; @@ -941,7 +941,7 @@ fn mergeInto(comptime T: type, from: []T, A: &const Range, B: &const Range, less } } -fn mergeExternal(comptime T: type, items: []T, A: &const Range, B: &const Range, lessThan: fn (&const T, &const T) bool, cache: []T) void { +fn mergeExternal(comptime T: type, items: []T, A: *const Range, B: *const Range, lessThan: fn (*const T, *const T) bool, cache: []T) void { // A fits into the cache, so use that instead of the internal buffer var A_index: usize = 0; var B_index: usize = B.start; @@ -969,26 +969,26 @@ fn mergeExternal(comptime T: type, items: []T, A: &const Range, B: &const Range, mem.copy(T, items[insert_index..], cache[A_index..A_last]); } -fn swap(comptime T: type, items: []T, lessThan: fn (lhs: &const T, rhs: &const T) bool, order: &[8]u8, x: usize, y: usize) void { +fn swap(comptime T: type, items: []T, lessThan: fn (lhs: *const T, rhs: *const T) bool, order: *[8]u8, x: usize, y: usize) void { if (lessThan(items[y], items[x]) or ((order.*)[x] > (order.*)[y] and !lessThan(items[x], items[y]))) { mem.swap(T, &items[x], &items[y]); mem.swap(u8, &(order.*)[x], &(order.*)[y]); } } -fn i32asc(lhs: &const i32, rhs: &const i32) bool { +fn i32asc(lhs: *const i32, rhs: *const i32) bool { return lhs.* < rhs.*; } -fn i32desc(lhs: &const i32, rhs: &const i32) bool { +fn i32desc(lhs: *const i32, rhs: *const i32) bool { return rhs.* < lhs.*; } -fn u8asc(lhs: &const u8, rhs: &const u8) bool { +fn u8asc(lhs: *const u8, rhs: *const u8) bool { return lhs.* < rhs.*; } -fn u8desc(lhs: &const u8, rhs: &const u8) bool { +fn u8desc(lhs: *const u8, rhs: *const u8) bool { return rhs.* < lhs.*; } @@ -1125,7 +1125,7 @@ const IdAndValue = struct { id: usize, value: i32, }; -fn cmpByValue(a: &const IdAndValue, b: &const IdAndValue) bool { +fn cmpByValue(a: *const IdAndValue, b: *const IdAndValue) bool { return i32asc(a.value, b.value); } @@ -1324,7 +1324,7 @@ test "sort fuzz testing" { var fixed_buffer_mem: [100 * 1024]u8 = undefined; -fn fuzzTest(rng: &std.rand.Random) void { +fn fuzzTest(rng: *std.rand.Random) void { const array_size = rng.range(usize, 0, 1000); var fixed_allocator = std.heap.FixedBufferAllocator.init(fixed_buffer_mem[0..]); var array = fixed_allocator.allocator.alloc(IdAndValue, array_size) catch unreachable; @@ -1345,7 +1345,7 @@ fn fuzzTest(rng: &std.rand.Random) void { } } -pub fn min(comptime T: type, items: []T, lessThan: fn (lhs: &const T, rhs: &const T) bool) T { +pub fn min(comptime T: type, items: []T, lessThan: fn (lhs: *const T, rhs: *const T) bool) T { var i: usize = 0; var smallest = items[0]; for (items[1..]) |item| { @@ -1356,7 +1356,7 @@ pub fn min(comptime T: type, items: []T, lessThan: fn (lhs: &const T, rhs: &cons return smallest; } -pub fn max(comptime T: type, items: []T, lessThan: fn (lhs: &const T, rhs: &const T) bool) T { +pub fn max(comptime T: type, items: []T, lessThan: fn (lhs: *const T, rhs: *const T) bool) T { var i: usize = 0; var biggest = items[0]; for (items[1..]) |item| { |
