mirror of
https://github.com/ziglang/zig.git
synced 2024-11-27 23:52:31 +00:00
f5edaa96dd
This moves functions that LLVM generates calls to, to the compiler_rt implementation itself, rather than c.zig. This is a prerequisite for native backends to link with compiler-rt. This also allows native backends to generate calls to `memcpy` and the like.
31 lines
719 B
Zig
31 lines
719 B
Zig
const std = @import("std");
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const common = @import("./common.zig");
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comptime {
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@export(memset, .{ .name = "memset", .linkage = common.linkage });
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@export(__memset, .{ .name = "__memset", .linkage = common.linkage });
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}
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pub fn memset(dest: ?[*]u8, c: u8, len: usize) callconv(.C) ?[*]u8 {
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@setRuntimeSafety(false);
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if (len != 0) {
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var d = dest.?;
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var n = len;
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while (true) {
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d[0] = c;
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n -= 1;
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if (n == 0) break;
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d += 1;
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}
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}
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return dest;
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}
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pub fn __memset(dest: ?[*]u8, c: u8, n: usize, dest_n: usize) callconv(.C) ?[*]u8 {
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if (dest_n < n)
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@panic("buffer overflow");
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return memset(dest, c, n);
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}
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