common.h

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// BSD 3-Clause License; see https://github.com/scikit-hep/awkward/blob/main/LICENSE
 
#ifndef AWKWARD_COMMON_H_
#define AWKWARD_COMMON_H_
 
#include <cstddef>
#include <cstdint>
 
#ifdef _MSC_VER
  #define EXPORT_SYMBOL __declspec(dllexport)
  #define ERROR Error
  using ssize_t = std::ptrdiff_t;
#else
  #define EXPORT_SYMBOL __attribute__((visibility("default")))
  #define ERROR struct Error
#endif
 
#define QUOTE(x) #x
 
#define FILENAME_FOR_EXCEPTIONS_C(filename, line) "\n\n(https://github.com/scikit-hep/awkward/blob/awkward-cpp-" VERSION_INFO "/awkward-cpp/" filename "#L" #line ")"
#define FILENAME_FOR_EXCEPTIONS(filename, line) std::string(FILENAME_FOR_EXCEPTIONS_C(filename, line))
 
#ifdef __GNUC__
// Silence a gcc warning: type attributes ignored after type is already defined
  #define EXPORT_TEMPLATE_INST
#else
  #define EXPORT_TEMPLATE_INST EXPORT_SYMBOL
#endif
 
#include <iostream>
#include <algorithm>
#include <map>
#include <vector>
#include <mutex>
#include <memory>
#include <cstring>
 
extern "C" {
  struct EXPORT_SYMBOL Error {
    const char* str;
    const char* filename;
    int64_t identity;
    int64_t attempt;
  };
 
  const int8_t   kMaxInt8   =                 127;   // 2**7  - 1
  const uint8_t  kMaxUInt8  =                 255;   // 2**8  - 1
  const int32_t  kMaxInt32  =          2147483647;   // 2**31 - 1
  const uint32_t kMaxUInt32 =          4294967295;   // 2**32 - 1
  const int64_t  kMaxInt64  = 9223372036854775806;   // 2**63 - 2: see below
  const int64_t  kSliceNone = kMaxInt64 + 1;         // for Slice::none()
  const int64_t  kMaxLevels =                  48;
 
  inline struct Error
    success() {
        struct Error out;
        out.str = nullptr;
        out.filename = nullptr;
        out.identity = kSliceNone;
        out.attempt = kSliceNone;
        return out;
    };
 
  inline struct Error
    failure(
      const char* str,
      int64_t identity,
      int64_t attempt,
      const char* filename) {
        struct Error out;
        out.str = str;
        out.filename = filename;
        out.identity = identity;
        out.attempt = attempt;
        return out;
    };
}
 
#endif // AWKWARD_COMMON_H_