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#include "attr-set.hh"
#include "eval.hh"
#include <algorithm>
namespace nix {
/* Note: Various places expect the allocated memory to be zeroed. */
static void * allocBytes(size_t n)
{
void * p;
#if HAVE_BOEHMGC
p = GC_malloc(n);
#else
p = calloc(n, 1);
#endif
if (!p) throw std::bad_alloc();
return p;
}
/* Allocate a new array of attributes for an attribute set with a specific
capacity. The space is implicitly reserved after the Bindings
structure. */
Bindings * EvalState::allocBindings(size_t capacity)
{
if (capacity > std::numeric_limits<Bindings::size_t>::max())
throw Error("attribute set of size %d is too big", capacity);
return new (allocBytes(sizeof(Bindings) + sizeof(Attr) * capacity)) Bindings((Bindings::size_t) capacity);
}
void EvalState::mkAttrs(Value & v, size_t capacity)
{
if (capacity == 0) {
v = vEmptySet;
return;
}
clearValue(v);
v.type = tAttrs;
v.attrs = allocBindings(capacity);
nrAttrsets++;
nrAttrsInAttrsets += capacity;
}
/* Create a new attribute named 'name' on an existing attribute set stored
in 'vAttrs' and return the newly allocated Value which is associated with
this attribute. */
Value * EvalState::allocAttr(Value & vAttrs, const Symbol & name)
{
Value * v = allocValue();
vAttrs.attrs->push_back(Attr(name, v));
return v;
}
void Bindings::sort()
{
std::sort(begin(), end());
}
}
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