/******************************************************************************
* Trim_err.c - handler for all trim library fatal errors.		      *
*******************************************************************************
* (C) Gershon Elber, Technion, Israel Institute of Technology                 *
*******************************************************************************
* Written by Gershon Elber, October 94.					      *
******************************************************************************/

#include "trim_loc.h"

typedef struct TrimErrorStruct {
    TrimFatalErrorType ErrorNum;
    char *ErrorDesc;
} TrimErrorStruct;

static TrimErrorStruct ErrMsgs[] =
{
    { TRIM_ERR_TRIM_CRV_E2,	"Trimming curve must have E2 point type." },

    { TRIM_ERR_BZR_BSP_EXPECT,	"Bezier or Bspline representation expected." },
    { TRIM_ERR_DIR_NOT_CONST_UV,"Dir is not one of CONST_U/V_DIR." },
    { TRIM_ERR_ODD_NUM_OF_INTER,"Odd # of intersections with trimming crvs." },
    { TRIM_ERR_TCRV_ORIENT,     "Improper trimmingcurve orientations." },
    { TRIM_ERR_INCONSISTENT_CNTRS, "Inconsistent contours detected." },

    { TRIM_ERR_UNDEFINE_ERR,	NULL }
};

/*****************************************************************************
* DESCRIPTION:                                                               M
* Returns a string describing a the given error. Errors can be raised by     M
* any member of this trim library as well as other users. Raised error will  M
* cause an invokation of TrimFatalError function which decides how to handle M
* this error. TrimFatalError can for example, invoke this routine with the   M
* error type, print the appropriate message and quit the program.            M
*                                                                            *
* PARAMETERS:                                                                M
*   ErrorNum:   Type of the error that was raised.                           M
*                                                                            *
* RETURN VALUE:                                                              M
*   char *:     A string describing the error type.                          M
*                                                                            *
* KEYWORDS:                                                                  M
*   TrimDescribeError, error handling                                        M
*****************************************************************************/
char *TrimDescribeError(TrimFatalErrorType ErrorNum)
{
    int i = 0;

    for ( ; ErrMsgs[i].ErrorDesc != NULL; i++)
	if (ErrorNum == ErrMsgs[i].ErrorNum)
	    return ErrMsgs[i].ErrorDesc;

    return "Undefined error";
}