#pragma once

#include "libexpr/eval.hh"

#define LocalNoInline(f)              \
  static f __attribute__((noinline)); \
  f
#define LocalNoInlineNoReturn(f)                \
  static f __attribute__((noinline, noreturn)); \
  f

namespace nix {

LocalNoInlineNoReturn(void throwEvalError(const char* s, const Pos& pos)) {
  throw EvalError(format(s) % pos);
}

LocalNoInlineNoReturn(void throwTypeError(const char* s, const Value& v)) {
  throw TypeError(format(s) % showType(v));
}

LocalNoInlineNoReturn(void throwTypeError(const char* s, const Value& v,
                                          const Pos& pos)) {
  throw TypeError(format(s) % showType(v) % pos);
}

void EvalState::forceValue(Value& v, const Pos& pos) {
  if (v.type == tThunk) {
    Env* env = v.thunk.env;
    Expr* expr = v.thunk.expr;
    try {
      v.type = tBlackhole;
      // checkInterrupt();
      expr->eval(*this, *env, v);
    } catch (...) {
      v.type = tThunk;
      v.thunk.env = env;
      v.thunk.expr = expr;
      throw;
    }
  } else if (v.type == tApp) {
    callFunction(*v.app.left, *v.app.right, v, noPos);
  } else if (v.type == tBlackhole) {
    throwEvalError("infinite recursion encountered, at %1%", pos);
  }
}

inline void EvalState::forceAttrs(Value& v) {
  forceValue(v);
  if (v.type != tAttrs) {
    throwTypeError("value is %1% while a set was expected", v);
  }
}

inline void EvalState::forceAttrs(Value& v, const Pos& pos) {
  forceValue(v);
  if (v.type != tAttrs) {
    throwTypeError("value is %1% while a set was expected, at %2%", v, pos);
  }
}

inline void EvalState::forceList(Value& v) {
  forceValue(v);
  if (!v.isList()) {
    throwTypeError("value is %1% while a list was expected", v);
  }
}

inline void EvalState::forceList(Value& v, const Pos& pos) {
  forceValue(v);
  if (!v.isList()) {
    throwTypeError("value is %1% while a list was expected, at %2%", v, pos);
  }
}

/* Note: Various places expect the allocated memory to be zeroed. */
inline 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;
}

}  // namespace nix