move stdc.h from ../jt/ to here

move PI defn from util++.hh to stdc.h


git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinAnalysis/AHFinderDirect/trunk@51 f88db872-0e4f-0410-b76b-b9085cfa78c5

1 files changed, 114 insertions, 0 deletions

diff --git a/src/jtutil/stdc.h b/src/jtutil/stdc.h
new file mode 100644
index 0000000..b53f3c8
--- /dev/null
+++ b/src/jtutil/stdc.h
@@ -0,0 +1,114 @@
+/* stdc.h -- JT standard C/C++ header file, cut-down for modern code only */
+/* $Id$ */
+
+/*
+ * ***** THIS VERSION IS FOR ANSI/ISO C AND C++ *****
+ */
+
+/* this header file is idempotent */
+#ifndef STDC_H_SEEN
+#define STDC_H_SEEN
+
+/******************************************************************************/
+
+/*
+ * C/C++ compatability:
+ */
+
+/* use this in prototypes like this:   extern C_FUNCTION void foo(...) */
+#ifdef __cplusplus
+  #define C_FUNCTION	"C"
+#else
+  #define C_FUNCTION	/* empty */
+#endif
+
+/******************************************************************************/
+
+/*
+ * Fake "then" keyword for if statement, to make "then" and "else"
+ * symmetrical:
+ *
+ * usage:
+ *	if (foo)
+ *	   then bar;
+ *	   else baz;
+ */
+#define then	/* empty */
+
+/******************************************************************************/
+
+#ifdef M_PI		/* usually defined in <math.h> */
+  #define PI	M_PI
+#endif
+
+/******************************************************************************/
+
+#ifndef FILENAME_MAX
+  #if   defined(LINUX)
+    #define FILENAME_MAX		4095
+  #elif defined(ALPHA)
+    /* gcc already defines this */
+  #else /* other systems */
+    #define FILENAME_MAX		(BUFSIZ-1)
+  #endif /* LINUX */
+#endif
+
+/******************************************************************************/
+
+#ifdef __cplusplus
+namespace jtutil
+	  {
+#endif
+
+/*
+ * All my error handling is done with my error_exit() routine.  It
+ * prints an error message to stderr, then does an exit() or abort().
+ * It does *not* return to its caller.  It's declared to return an
+ *  int , however, so it may be easily used in conditional expressions
+ * like
+ *	foo = bar_ok ? baz(bar) : error_exit(...);
+ */
+extern C_FUNCTION int error_exit(int exit_code, const char *format, ...)
+  #ifdef __GNUC__
+  __attribute__ ((noreturn))
+  __attribute__ ((format(printf,2,3)))
+  #endif
+;
+
+/*
+ * error_exit() uses the following exit() codes:
+ *	OK_EXIT		==> everything's under control
+ *	ERROR_EXIT	==> something bad has happened
+ *	PANIC_EXIT	==> diasaster ==> force (eg) core dump, stack trace
+ */
+
+#ifdef VMS
+  #define OK_EXIT	1
+  #define ERROR_EXIT	3
+  #define PANIC_EXIT	(-1)
+#else
+  #define OK_EXIT	0
+  #define ERROR_EXIT	1
+  #define PANIC_EXIT	(-1)
+#endif
+
+#ifdef __cplusplus
+	  }	/* close namespace jtutil */
+#endif
+
+/******************************************************************************/
+
+#define iabs	abs	/* C library uses abs() for integer absolute value */
+
+#define INT_SENTINAL_VALUE	(~ INT_MAX)	/* from <limits.h> */
+						/* usually 10...0 binary for */
+						/* a 2's complement system */
+#define FLOAT_SENTINAL_VALUE	(- FLT_MAX)	/* from <float.h> */
+#define DOUBLE_SENTINAL_VALUE	(- DBL_MAX)	/* from <float.h> */
+
+/* misc integer sentinal value */
+#define SENTINAL_VALUE		INT_SENTINAL_VALUE
+
+/******************************************************************************/
+
+#endif	/* STDC_H_SEEN */