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/**
* Implementation of array assignment support routines.
*
*
* Copyright: Copyright Digital Mars 2010 - 2016.
* License: Distributed under the
* $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0).
* Authors: Walter Bright, Kenji Hara
* Source: $(DRUNTIMESRC rt/_arrayassign.d)
*/
module rt.arrayassign;
private
{
import core.internal.util.array;
import core.stdc.string;
import core.stdc.stdlib;
debug(PRINTF) import core.stdc.stdio;
}
/**
Set all elements of an array to a single value.
---
p[0 .. count] = value;
---
Takes into account postblits and destructors, for Plain Old Data elements,
`rt/memset.d` is used.
Params:
p = pointer to start of array
value = bytes of the element to set. Size is derived from `ti`.
count = amount of array elements to set
ti = type info of the array element type / `value`
Returns: `p`
*/
extern (C) void* _d_arraysetassign(void* p, void* value, int count, TypeInfo ti)
{
void* pstart = p;
auto element_size = ti.tsize;
// Need a temporary buffer tmp[] big enough to hold one element
immutable maxAllocaSize = 512;
void *ptmp = (element_size > maxAllocaSize) ? malloc(element_size) : alloca(element_size);
foreach (i; 0 .. count)
{
memcpy(ptmp, p, element_size);
memcpy(p, value, element_size);
ti.postblit(p);
ti.destroy(ptmp);
p += element_size;
}
if (element_size > maxAllocaSize)
free(ptmp);
return pstart;
}
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