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/* See LICENSE file for copyright and license details. */
#include "internals.h"
#define LIST_ERRORS\
X(ZERROR_0_POW_0, "indeterminate form: 0:th power of 0")\
X(ZERROR_0_DIV_0, "indeterminate form: 0 divided by 0")\
X(ZERROR_DIV_0, "undefined result: division by 0")\
X(ZERROR_NEGATIVE, "argument must be non-negative")
enum zerror
zerror(const char **desc)
{
if (libzahl_error >= 0) {
if (desc)
*desc = strerror(libzahl_error);
errno = libzahl_error;
return ZERROR_ERRNO_SET;
}
if (desc) {
switch (-libzahl_error) {
#define X(V, D) case V: *desc = D; break;
LIST_ERRORS
#undef X
default:
abort();
}
}
return -libzahl_error;
}
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