Commit fe98a2da70cedaad47ea70d58399e04eb1c7ead2 | zig

author	Bas van den Berg <mailbasvandenberg@gmail.com> 2018-07-13 23:01:21+02:00
committer	Bas van den Berg <mailbasvandenberg@gmail.com> 2018-07-13 23:01:21+02:00
log	fe98a2da70cedaad47ea70d58399e04eb1c7ead2
tree	6f988b74cced8f996c137223f2a6bf776c7fc2c0
parent	a1cafa650d4ba64404f5db932a40c67b96ccfd1e

2 files changed, 20 insertions(+), 2 deletions(-)

std/array_list.zig+2-2

...	...	@@ -85,7 +85,7 @@ pub fn AlignedArrayList(comptime T: type, comptime A: u29) type {
85	85	try self.ensureCapacity(self.len + 1);
86	86	self.len += 1;
87	87
88		mem.copy(T, self.items[n + 1 .. self.len], self.items[n .. self.len - 1]);
	88	mem.copyBackwards(T, self.items[n + 1 .. self.len], self.items[n .. self.len - 1]);
89	89	self.items[n] = item;
90	90	}
91	91
...	...	@@ -93,7 +93,7 @@ pub fn AlignedArrayList(comptime T: type, comptime A: u29) type {
93	93	try self.ensureCapacity(self.len + items.len);
94	94	self.len += items.len;
95	95
96		mem.copy(T, self.items[n + items.len .. self.len], self.items[n .. self.len - items.len]);
	96	mem.copyBackwards(T, self.items[n + items.len .. self.len], self.items[n .. self.len - items.len]);
97	97	mem.copy(T, self.items[n .. n + items.len], items);
98	98	}
99	99

std/mem.zig+18

...	...	@@ -125,6 +125,7 @@ pub const Allocator = struct {
125	125
126	126	/// Copy all of source into dest at position 0.
127	127	/// dest.len must be >= source.len.
	128	/// dest.ptr must be <= src.ptr.
128	129	pub fn copy(comptime T: type, dest: []T, source: []const T) void {
129	130	// TODO instead of manually doing this check for the whole array
130	131	// and turning off runtime safety, the compiler should detect loops like
...	...	@@ -135,6 +136,23 @@ pub fn copy(comptime T: type, dest: []T, source: []const T) void {
135	136	dest[i] = s;
136	137	}
137	138
	139	/// Copy all of source into dest at position 0.
	140	/// dest.len must be >= source.len.
	141	/// dest.ptr must be >= src.ptr.
	142	pub fn copyBackwards(comptime T: type, dest: []T, source: []const T) void {
	143	// TODO instead of manually doing this check for the whole array
	144	// and turning off runtime safety, the compiler should detect loops like
	145	// this and automatically omit safety checks for loops
	146	@setRuntimeSafety(false);
	147	assert(dest.len >= source.len);
	148	var i = source.len;
	149	while(i > 0){
	150	i -= 1;
	151	dest[i] = source[i];
	152	}
	153	}
	154
	155
138	156	pub fn set(comptime T: type, dest: []T, value: T) void {
139	157	for (dest) \|*d\|
140	158	d.* = value;