1 files changed, 78 insertions, 0 deletions
diff --git a/cppawk-include/case-priv.h b/cppawk-include/case-priv.h
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+++ b/cppawk-include/case-priv.h
@@ -0,0 +1,78 @@
+// 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_PRIV_H
+#define __CPPAWK_CASE_PRIV_H
+
+#ifndef __CPPAWK_NARG_PRIV
+#include "narg-priv.h"
+#endif
+
+#ifndef __CPPAWK_BASE
+#include "base.h"
+#endif
+
+#if __gawk__
+
+#define __casx(x)       case x:
+
+#define __case_temps    __ign
+#define __case(expr)    switch (expr)
+#define __of(...)       __xcat(__rep_, __narg(__VA_ARGS__))(__casx,           \
+                                                            __VA_ARGS__) {{{
+#define __matching(...) __xcat(__rep_, __narg(__VA_ARGS__))(__casx,           \
+                                                            __VA_ARGS__) {{{
+#define __cbreak        break; }}}
+#define __cfall         }}}
+#define __cret(val)     return val; }}}
+#define __otherwise     default: {{{
+
+#else
+
+#define __clause(expr)  if (__pass || (expr) && (__pass = 1))
+#define __of_first(x)   (__val == (x))
+#define __of_next(x)    || (__val == (x))
+#define __mtch_first(x) (__val ~ (x))
+#define __mtch_next(x)  || (__val ~ (x))
+
+#define __case_temps    __val, __once, __pass
+#define __case(expr)    for ((__once = 1) && (__pass = 0) || (__val = expr);  \
+                             __once;                                          \
+                             __once = 0)
+#define __of(...)       __clause(__xcat(__repi_, __narg(__VA_ARGS__))         \
+                                 (__of_first, __of_next, __VA_ARGS__)) {{{
+#define __matching(...)  __clause(__xcat(__repi_, __narg(__VA_ARGS__))         \
+                                 (__mtch_first, __mtch_next, __VA_ARGS__)) {{{
+#define __cbreak        break; }}}
+#define __creturn(val)  return val; }}}
+#define __cfall         }}}
+#define __cret(val)     return val; }}}
+#define __otherwise     if (__pass = 1) {{{
+
+#endif
+
+#endif