cplxerr(3C++)
complex_error - error-handling function for the C++ Complex Math Library
As shipped in IRIX 6.5. First release of IRIX 6.5.
NAME complex_error - error-handling function for the C++ Complex Math Library SYNOPSIS #include <complex.h> class c_exception { int type; char *name; complex arg1; complex arg2; complex retval; public: c_exception( char *n, const complex& a1, const complex& a2 = complex_zero ); friend int complex_error( c_exception& ); friend complex exp( complex ); friend complex sinh( complex ); friend complex cosh( complex ); friend complex log( complex ); }; DESCRIPTION In the following description of the complex error handling routine, - i is of type int and - x is of type c_exception. i = complex_error(x) Invoked by functions in the C++ Complex Mathematics Library when errors are detected. Users may define their own procedures for handling errors, by defining a function named complex_error in their programs. complex_error must be of the form described above. The element type is an integer describing the type of error that has occurred, from the following list of constants (defined in the header file): SING argument singularity OVERFLOW overflow range error UNDERFLOW underflow range error The element name points to a string containing the name of the function that incurred the error. The variables arg1 and arg2 are the arguments with which the function was invoked. retval is set to the default value that will be returned by the function unless the user's complex_error sets it to a different value. If the user's complex_error function returns non-zero, no error message will be printed, and errno will not be set. If complex_error is not supplied by the user, the default error-handling procedures, described with the complex math functions involved, will be invoked upon error. These procedures are also summarized in the table below. In every case, errno is set to EDOM or ERANGE and the program continues. Note that complex math functions call functions included in the math library which has its own error handling routine, matherr(3M). Users may also override this routine by supplying their own version. ____________________________________________________________ DEFAULT ERROR HANDLING PROCEDURES ____________________________________________________________ ____________________________________________________________ Types of Errors ____________________________________________________________ ____________________________________________________________ type SING OVERFLOW UNDERFLOW ____________________________________________________________ ____________________________________________________________ errno EDOM ERANGE ERANGE ____________________________________________________________ ____________________________________________________________ EXP: ____________________________________________________________ real too large/small - (_H, _H) (0, 0) ____________________________________________________________ imag too large - (0, 0) - ____________________________________________________________ ____________________________________________________________ LOG: ____________________________________________________________ arg = (0, 0) M, (H, 0) - - ____________________________________________________________ ____________________________________________________________ SINH: ____________________________________________________________ real too large - (_H, _H) - ____________________________________________________________ imag too large - (0, 0) - ____________________________________________________________ ____________________________________________________________ COSH: ____________________________________________________________ real too large - (_H, _H) - ____________________________________________________________ imag too large - (0, 0) - ____________________________________________________________ | | | | | _____________________________________________________________ | | | | | ______________________________________________ ABBREVIATIONS M Message is printed (EDOM error). (H, 0) (HUGE, 0) is returned. (_H, _H) (_HUGE, _HUGE) is returned. (0, 0) (0, 0) is returned. ______________________________________________ | | SEE ALSO complex(3C++), matherr(3M), cartpol(3C++), cplxops(3C++), cplxexp(3C++), and cplxtrig(3C++).