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components/external/espruino/libs/math/mtherr.c

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+/*							mtherr.c
+ *
+ *	Library common error handling routine
+ *
+ *
+ *
+ * SYNOPSIS:
+ *
+ * char *fctnam;
+ * int code;
+ * int mtherr();
+ *
+ * mtherr( fctnam, code );
+ *
+ *
+ *
+ * DESCRIPTION:
+ *
+ * This routine may be called to report one of the following
+ * error conditions (in the include file mconf.h).
+ *  
+ *   Mnemonic        Value          Significance
+ *
+ *    DOMAIN            1       argument domain error
+ *    SING              2       function singularity
+ *    OVERFLOW          3       overflow range error
+ *    UNDERFLOW         4       underflow range error
+ *    TLOSS             5       total loss of precision
+ *    PLOSS             6       partial loss of precision
+ *    EDOM             33       Unix domain error code
+ *    ERANGE           34       Unix range error code
+ *
+ * The default version of the file prints the function name,
+ * passed to it by the pointer fctnam, followed by the
+ * error condition.  The display is directed to the standard
+ * output device.  The routine then returns to the calling
+ * program.  Users may wish to modify the program to abort by
+ * calling exit() under severe error conditions such as domain
+ * errors.
+ *
+ * Since all error conditions pass control to this function,
+ * the display may be easily changed, eliminated, or directed
+ * to an error logging device.
+ *
+ * SEE ALSO:
+ *
+ * mconf.h
+ *
+ */
+
+/*
+Cephes Math Library Release 2.0:  April, 1987
+Copyright 1984, 1987 by Stephen L. Moshier
+Direct inquiries to 30 Frost Street, Cambridge, MA 02140
+*/
+#if 0
+#include <stdio.h>
+#endif
+#include "mconf.h"
+
+int merror = 0;
+
+/* Notice: the order of appearance of the following
+ * messages is bound to the error codes defined
+ * in mconf.h.
+ */
+static char *ermsg[7] = {
+"unknown",      /* error code 0 */
+"domain",       /* error code 1 */
+"singularity",  /* et seq.      */
+"overflow",
+"underflow",
+"total loss of precision",
+"partial loss of precision"
+};
+
+
+int mtherr( name, code )
+char *name;
+int code;
+{
+#if 0
+/* Display string passed by calling program,
+ * which is supposed to be the name of the
+ * function in which the error occurred:
+ */
+printf( "\n%s ", name );
+
+/* Set global error message word */
+merror = code;
+
+/* Display error message defined
+ * by the code argument.
+ */
+if( (code <= 0) || (code >= 7) )
+	code = 0;
+printf( "%s error\n", ermsg[code] );
+#endif
+/* Return to calling
+ * program
+ */
+return( 0 );
+}