New <case.h> header and macro.

This provides a portable case statement implemented directly
as switch on GNU Awk, and using other approaches on other Awks
that do not have switch.

1 files changed, 45 insertions, 0 deletions

diff --git a/cppawk-include/case.h b/cppawk-include/case.h
new file mode 100644
index 0000000..79a04b8
--- /dev/null
+++ b/cppawk-include/case.h
@@ -0,0 +1,45 @@
+// cppawk: C preprocessor wrapper around awk
+// Kaz Kylheku <kaz@kylheku.com>
+//
+// BSD-2 License
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice,
+//    this list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice,
+//    this list of conditions and the following disclaimer in the documentation
+//    and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef __CPPAWK_CASE_H
+#define __CPPAWK_CASE_H
+
+#ifndef __CPPAWK_CASE_PRIV_H
+#include "case-priv.h"
+#endif
+
+#define case_temps      __case_temps
+#define case(expr)      __case(expr)
+#define of(...)         __of(__VA_ARGS__)
+#define matching(...)   __matching(__VA_ARGS__)
+#define cbreak          __cbreak
+#define cfall           __cfall
+#define cret(val)       __cret(val)
+#define then            __do
+#define otherwise       __otherwise
+
+#endif