Builtin: implement break built-in

4 files changed, 157 insertions, 0 deletions

diff --git a/src/builtins/break_builtin.cpp b/src/builtins/break_builtin.cpp
new file mode 100644
index 0000000..0ee20a7
--- /dev/null
+++ b/src/builtins/break_builtin.cpp
@@ -0,0 +1,51 @@
+/*
+   Please use git log for copyright holder and year information
+
+   This file is part of libbash.
+
+   libbash is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 2 of the License, or
+   (at your option) any later version.
+
+   libbash is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with libbash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+///
+/// \file break_builtin.h
+/// \brief implementation for the break builtin
+///
+#include "builtins/break_builtin.h"
+
+#include <boost/lexical_cast.hpp>
+
+#include "builtins/builtin_exceptions.h"
+#include "core/interpreter_exception.h"
+
+int break_builtin::exec(const std::vector<std::string>& bash_args)
+{
+  int nth = 1;
+
+  if(bash_args.size() > 1)
+  {
+    throw libbash::interpreter_exception("break: too many arguments");
+  }
+  else if(bash_args.size() == 1)
+  {
+    try
+    {
+      nth = boost::lexical_cast<int>(bash_args[0]);
+    }
+    catch(boost::bad_lexical_cast& e)
+    {
+      throw libbash::interpreter_exception("break: argument should be an integer");
+    }
+  }
+
+  throw break_exception(nth);
+}
diff --git a/src/builtins/break_builtin.h b/src/builtins/break_builtin.h
new file mode 100644
index 0000000..fec1bc7
--- /dev/null
+++ b/src/builtins/break_builtin.h
@@ -0,0 +1,35 @@
+/*
+   Please use git log for copyright holder and year information
+
+   This file is part of libbash.
+
+   libbash is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 2 of the License, or
+   (at your option) any later version.
+
+   libbash is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with libbash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+///
+/// \file break_builtin.h
+/// \brief implementation for the break builtin
+///
+#ifndef LIBBASH_BUILTINS_BREAK_BUILTIN_H_
+#define LIBBASH_BUILTINS_BREAK_BUILTIN_H_
+
+#include "cppbash_builtin.h"
+
+class break_builtin : public virtual cppbash_builtin
+{
+public:
+  BUILTIN_CONSTRUCTOR(break)
+  virtual int exec(const std::vector<std::string>& );
+};
+
+#endif
diff --git a/src/builtins/tests/break_tests.cpp b/src/builtins/tests/break_tests.cpp
new file mode 100644
index 0000000..eba422e
--- /dev/null
+++ b/src/builtins/tests/break_tests.cpp
@@ -0,0 +1,69 @@
+/*
+   Please use git log for copyright holder and year information
+
+   This file is part of libbash.
+
+   libbash is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 2 of the License, or
+   (at your option) any later version.
+
+   libbash is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with libbash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+///
+/// \file break_tests.cpp
+/// \brief series of unit tests for break builtin
+///
+#include <boost/lexical_cast.hpp>
+#include <gtest/gtest.h>
+
+#include "builtins/builtin_exceptions.h"
+#include "core/interpreter.h"
+#include "cppbash_builtin.h"
+
+TEST(break_builtin_test, bad_argument)
+{
+  interpreter walker;
+  EXPECT_THROW(cppbash_builtin::exec("break", {"abc"}, std::cout, std::cerr, std::cin, walker), libbash::interpreter_exception);
+  EXPECT_THROW(cppbash_builtin::exec("break", {"1", "2"}, std::cout, std::cerr, std::cin, walker), libbash::interpreter_exception);
+  EXPECT_THROW(cppbash_builtin::exec("break", {"0"}, std::cout, std::cerr, std::cin, walker), libbash::interpreter_exception);
+  EXPECT_THROW(cppbash_builtin::exec("break", {"-1"}, std::cout, std::cerr, std::cin, walker), libbash::interpreter_exception);
+}
+
+TEST(break_builtin_test, throw_exception)
+{
+  interpreter walker;
+  try
+  {
+    cppbash_builtin::exec("break", {}, std::cout, std::cerr, std::cin, walker);
+    FAIL();
+  }
+  catch(break_exception& e)
+  {
+    EXPECT_NO_THROW(e.rethrow_unless_correct_frame());
+  }
+
+  try
+  {
+    cppbash_builtin::exec("break", {"2"}, std::cout, std::cerr, std::cin, walker);
+    FAIL();
+  }
+  catch(break_exception& e)
+  {
+    try
+    {
+      e.rethrow_unless_correct_frame();
+      FAIL();
+    }
+    catch(break_exception& e)
+    {
+      EXPECT_NO_THROW(e.rethrow_unless_correct_frame());
+    }
+  }
+}
diff --git a/src/cppbash_builtin.cpp b/src/cppbash_builtin.cpp
index 97ab789..52c5c9b 100644
--- a/src/cppbash_builtin.cpp
+++ b/src/cppbash_builtin.cpp
@@ -29,6 +29,7 @@
 
 #include "builtins/boolean_builtins.h"
 #include "builtins/builtin_exceptions.h"
+#include "builtins/break_builtin.h"
 #include "builtins/continue_builtin.h"
 #include "builtins/declare_builtin.h"
 #include "builtins/echo_builtin.h"
@@ -51,6 +52,7 @@ cppbash_builtin::cppbash_builtin(BUILTIN_ARGS): _out_stream(&out), _err_stream(&
 
 cppbash_builtin::builtins_type& cppbash_builtin::builtins() {
   static boost::scoped_ptr<builtins_type> p(new builtins_type {
+      {"break", boost::factory<break_builtin*>()},
       {"continue", boost::factory<continue_builtin*>()},
       {"echo", boost::factory<echo_builtin*>()},
       {"eval", boost::factory<eval_builtin*>()},