moved sources to src dir

src/throw.cpp

@@ -0,0 +1,65 @@
+// throw macros for OS X and other POSIX systems
+// adapted for Windows as well, november 2014
+// copyright © 2002-2014 Bob Polis
+
+#include <string>
+#include <sstream>
+#include <iostream>
+#include <stdexcept>
+#include <system_error>
+#include "throw.hpp"
+
+using namespace std;
+
+static string combine_message_elements(const char* file,
+                                       unsigned int line,
+                                       const char* user_message,
+                                       const char* sys_message)
+{
+    ostringstream msg;
+    string f {file};
+    msg << sys_message << " (" << f.substr(f.rfind('/') + 1) << ":" << line << ")";
+    if (user_message) {
+        msg << ", " << user_message;
+    }
+    return msg.str();
+}
+
+void __throw_if_min1(int x,
+                     const char* file,
+                     unsigned int line,
+                     const char* message)
+{
+    if (x == -1) {
+        error_code ec {errno, system_category()};
+        ostringstream ec_str;
+        ec_str << "system error " <<  ec.value() << ": " << ec.message();
+        string msg {combine_message_elements(file, line, message, ec_str.str().c_str())};
+        throw system_error {ec, msg};
+    }
+}
+
+void __throw_if_null(const void* p,
+                     const char* file,
+                     unsigned int line,
+                     const char* message)
+{
+    if (p == nullptr) {
+        string msg {combine_message_elements(file, line, message, "null pointer exception")};
+        throw runtime_error {msg};
+    }
+}
+
+void __throw_if_err(int err,
+                    const char* file,
+                    unsigned int line,
+                    const char* message)
+{
+    if (err != 0) {
+        error_code ec {err, system_category()};
+        ostringstream ec_str;
+        ec_str << "error " <<  err;
+        string msg {combine_message_elements(file, line, message, ec_str.str().c_str())};
+        throw system_error {ec, msg};
+    }
+}

src/throw.hpp

@@ -0,0 +1,21 @@
+// throw macros for OS X and other POSIX systems
+// adapted for Windows as well, november 2014
+// copyright © 2002-2022 Bob Polis
+
+#ifndef __throw__
+#define __throw__
+
+// don't call these yourself; use the macros below instead
+void __throw_if_min1(int x, const char* file, unsigned int line, const char* message = nullptr);
+void __throw_if_null(const void* p, const char* file, unsigned int line, const char* message = nullptr);
+void __throw_if_err(int err, const char* file, unsigned int line, const char* message = nullptr);
+
+#define throw_if_min1(___x___)					__throw_if_min1((___x___), __FILE__, __LINE__)
+#define throw_if_null(__ptr__)					__throw_if_null((__ptr__), __FILE__, __LINE__)
+#define throw_if_err(__err__)					__throw_if_err((__err__), __FILE__, __LINE__)
+
+#define throw_if_min1_msg(___x___, ___msg___)	__throw_if_min1((___x___), __FILE__, __LINE__, ___msg___)
+#define throw_if_null_msg(__ptr__, ___msg___)	__throw_if_null((__ptr__), __FILE__, __LINE__, ___msg___)
+#define throw_if_err_msg(__err__, ___msg___)	__throw_if_err((__err__), __FILE__, __LINE__, ___msg___)
+
+#endif /* defined(__throw__) */