/* * __wt_strerror -- * Windows implementation of WT_SESSION.strerror and wiredtiger_strerror. */ const char * __wt_strerror(WT_SESSION_IMPL *session, int error, char *errbuf, size_t errlen) { DWORD lasterror; const char *p; char buf[512]; /* * Check for a WiredTiger or POSIX constant string, no buffer needed. */ if ((p = __wt_wiredtiger_error(error)) != NULL) return (p); /* * When called from wiredtiger_strerror, write a passed-in buffer. * When called from WT_SESSION.strerror, write the session's buffer. * * Check for Windows errors. */ if (error < 0) { error = __wt_map_error_to_windows_error(error); lasterror = FormatMessageA( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, error, 0, /* let system choose the correct LANGID */ buf, sizeof(buf), NULL); if (lasterror != 0 && session == NULL && snprintf(errbuf, errlen, "%s", buf) > 0) return (errbuf); if (lasterror != 0 && session != NULL && __wt_buf_fmt(session, &session->err, "%s", buf) == 0) return (session->err.data); } /* Fallback to a generic message. */ if (session == NULL && snprintf(errbuf, errlen, "error return: %d", error) > 0) return (errbuf); if (session != NULL && __wt_buf_fmt( session, &session->err, "error return: %d", error) == 0) return (session->err.data); /* Defeated. */ return ("Unable to return error string"); }
/* * __wt_strerror_r -- * Windows implementation of wiredtiger_strerror_r. */ int __wt_strerror_r(int error, char *buf, size_t buflen) { DWORD lasterror; const char *p; /* Require at least 2 bytes, printable character and trailing nul. */ if (buflen < 2) return (ENOMEM); /* * Check for POSIX errors, Windows errors, then fallback to something * generic. Copy the string into the user's buffer, return success if * anything printed. */ p = __wt_strerror(error); if (p != NULL && snprintf(buf, buflen, "%s", p) > 0) return (0); if (error < 0) { error = __wt_map_error_to_windows_error(error); lasterror = FormatMessageA( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, error, 0, /* let system choose the correct LANGID */ buf, buflen, NULL); if (lasterror != 0) return (0); /* Fall through to the fallback error code */ } /* Fallback to a generic message, then guess it's a memory problem. */ return ( snprintf(buf, buflen, "error return: %d", error) > 0 ? 0 : ENOMEM); }