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-rw-r--r--build2/diagnostics.cxx125
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diff --git a/build2/diagnostics.cxx b/build2/diagnostics.cxx
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+++ b/build2/diagnostics.cxx
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+// file : build2/diagnostics.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
+// license : MIT; see accompanying LICENSE file
+
+#include <build2/diagnostics>
+
+#include <cstring> // strchr()
+#include <iostream>
+
+#include <build2/utility>
+
+using namespace std;
+
+namespace build2
+{
+ // Relative stream.
+ //
+ const int relative_index = ostream::xalloc ();
+
+ void
+ print_process (const char* const* args, size_t n)
+ {
+ diag_record r (text);
+ print_process (r, args, n);
+ }
+
+ void
+ print_process (diag_record& r, const char* const* args, size_t n)
+ {
+ size_t m (0);
+ const char* const* p (args);
+ do
+ {
+ if (m != 0)
+ r << " |"; // Trailing space will be added inside the loop.
+
+ for (m++; *p != nullptr; p++, m++)
+ {
+ if (p != args)
+ r << ' ';
+
+ // Quote if empty or contains spaces.
+ //
+ bool q (**p == '\0' || strchr (*p, ' ') != nullptr);
+
+ if (q)
+ r << '"';
+
+ r << *p;
+
+ if (q)
+ r << '"';
+ }
+
+ if (m < n) // Can we examine the next element?
+ {
+ p++;
+ m++;
+ }
+
+ } while (*p != nullptr);
+ }
+
+ // Diagnostics verbosity level.
+ //
+ uint16_t verb;
+
+ // Diagnostic facility, base infrastructure.
+ //
+ ostream* diag_stream = &cerr;
+
+ diag_record::
+ ~diag_record () noexcept(false)
+ {
+ // Don't flush the record if this destructor was called as part of
+ // the stack unwinding. Right now this means we cannot use this
+ // mechanism in destructors, which is not a big deal, except for
+ // one place: exception_guard. So for now we are going to have
+ // this ugly special check which we will be able to get rid of
+ // once C++17 uncaught_exceptions() becomes available.
+ //
+ if (!empty_ && (!std::uncaught_exception () || exception_unwinding_dtor))
+ {
+ *diag_stream << os_.str () << std::endl;
+
+ if (epilogue_ != nullptr)
+ epilogue_ (*this); // Can throw.
+ }
+ }
+
+ // Diagnostic facility, project specifics.
+ //
+
+ void simple_prologue_base::
+ operator() (const diag_record& r) const
+ {
+ relative (r.os_, relative_);
+
+ if (type_ != nullptr)
+ r << type_ << ": ";
+
+ if (name_ != nullptr)
+ r << name_ << ": ";
+ }
+
+ void location_prologue_base::
+ operator() (const diag_record& r) const
+ {
+ relative (r.os_, relative_);
+
+ r << loc_.file << ':' << loc_.line << ':' << loc_.column << ": ";
+
+ if (type_ != nullptr)
+ r << type_ << ": ";
+
+ if (name_ != nullptr)
+ r << name_ << ": ";
+ }
+
+ const basic_mark error ("error");
+ const basic_mark warn ("warning");
+ const basic_mark info ("info");
+ const text_mark text;
+ const fail_mark<failed> fail;
+}