forked from lix-project/lix
db21cfa688
This modification moves Attr and Bindings structures into their own header file which is dedicated to the attribute set representation. The goal of to isolate pieces of code which are related to the attribute set representation. Thus future modifications of the attribute set representation will only have to modify these files, and not every other file across the evaluator.
60 lines
1.1 KiB
C++
60 lines
1.1 KiB
C++
#include "attr-set.hh"
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#include "eval.hh"
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#include <algorithm>
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namespace nix {
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static void * allocBytes(size_t n)
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{
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void * p;
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#if HAVE_BOEHMGC
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p = GC_malloc(n);
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#else
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p = malloc(n);
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#endif
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if (!p) throw std::bad_alloc();
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return p;
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}
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/* Allocate a new array of attributes for an attribute set with a specific
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capacity. The space is implicitly reserved after the Bindings
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structure. */
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Bindings * EvalState::allocBindings(Bindings::size_t capacity)
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{
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return new (allocBytes(sizeof(Bindings) + sizeof(Attr) * capacity)) Bindings(capacity);
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}
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void EvalState::mkAttrs(Value & v, unsigned int expected)
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{
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clearValue(v);
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v.type = tAttrs;
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v.attrs = allocBindings(expected);
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nrAttrsets++;
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nrAttrsInAttrsets += expected;
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}
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/* Create a new attribute named 'name' on an existing attribute set stored
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in 'vAttrs' and return the newly allocated Value which is associated with
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this attribute. */
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Value * EvalState::allocAttr(Value & vAttrs, const Symbol & name)
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{
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Value * v = allocValue();
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vAttrs.attrs->push_back(Attr(name, v));
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return v;
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}
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void Bindings::sort()
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{
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std::sort(begin(), end());
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}
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}
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