LSSTApplications  20.0.0
LSSTDataManagementBasePackage
base.cc
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1 #include "astshim/base.h"
2 
3 #include <sstream>
4 #include <stdexcept>
5 #include <string>
6 #include <vector>
7 
8 namespace ast {
9 namespace {
10 
11 static std::ostringstream errorMsgStream;
12 
13 /*
14 Write an error message to `errorMsgStream`
15 
16 Intended to be registered as an error handler to AST by calling `astSetPutErr(reportError)`.
17 */
18 void reportError(int errNum, const char *errMsg) { errorMsgStream << errMsg; }
19 
20 /*
21 Instantiate this class to register `reportError` as an AST error handler.
22 */
23 class ErrorHandler {
24 public:
25  ErrorHandler() { astSetPutErr(reportError); }
26 
27  ErrorHandler(ErrorHandler const &) = delete;
28  ErrorHandler(ErrorHandler &&) = delete;
29  ErrorHandler &operator=(ErrorHandler const &) = delete;
30  ErrorHandler &operator=(ErrorHandler &&) = delete;
31 
32  static std::string getErrMsg() {
33  auto errMsg = errorMsgStream.str();
34  // clear status bits
35  errorMsgStream.clear();
36  if (errMsg.empty()) {
37  errMsg = "Failed with AST status = " + std::to_string(astStatus);
38  } else {
39  // empty the stream
40  errorMsgStream.str("");
41  }
42  astClearStatus;
43  return errMsg;
44  }
45 };
46 
47 } // namespace
48 
49 void assertOK(AstObject *rawPtr1, AstObject *rawPtr2) {
50  // Construct ErrorHandler once, the first time this function is called.
51  // This is done to initialize `errorMsgStream` and register `reportError` as the AST error handler.
52  // See https://isocpp.org/wiki/faq/ctors#static-init-order-on-first-use
53  static ErrorHandler *errHandler = new ErrorHandler();
54  if (!astOK) {
55  if (rawPtr1) {
56  astAnnul(rawPtr1);
57  }
58  if (rawPtr2) {
59  astAnnul(rawPtr2);
60  }
61  throw std::runtime_error(errHandler->getErrMsg());
62  }
63 }
64 
66  return static_cast<ConstArray2D>(arrayFromVector(const_cast<std::vector<double> &>(vec), nAxes));
67 }
68 
70  int nPoints = vec.size() / nAxes;
71  if (nPoints * nAxes != vec.size()) {
73  os << "vec length = " << vec.size() << " not a multiple of nAxes = " << nAxes;
74  throw std::runtime_error(os.str());
75  }
76  Array2D::Index shape = ndarray::makeVector(nAxes, nPoints);
77  Array2D::Index strides = ndarray::makeVector(nPoints, 1);
78  return external(vec.data(), shape, strides);
79 }
80 
81 } // namespace ast
std::string
STL class.
ast::assertOK
void assertOK(AstObject *rawPtr1=nullptr, AstObject *rawPtr2=nullptr)
Throw std::runtime_error if AST's state is bad.
Definition: base.cc:49
std::vector< double >
std::vector::size
T size(T... args)
base.h
std::ostringstream::clear
T clear(T... args)
ast::Array2D
ndarray::Array< double, 2, 2 > Array2D
2D array of const double; typically used for lists of const points
Definition: base.h:42
std::to_string
T to_string(T... args)
std::runtime_error
STL class.
std::ostringstream
STL class.
ast
AST wrapper classes and functions.
Definition: attributes_channel.dox:1
os
std::ostream * os
Definition: Schema.cc:746
ast::arrayFromVector
ConstArray2D arrayFromVector(std::vector< double > const &vec, int nAxes)
Reshape a vector as a 2-dimensional array that shares the same memory.
Definition: base.cc:65
std::ostringstream::str
T str(T... args)
ast::ConstArray2D
ndarray::Array< const double, 2, 2 > ConstArray2D
2D array of const double; typically used for lists of const points
Definition: base.h:46
std::vector::data
T data(T... args)