1 /* strerror-sym.c - Describing an error code with its symbol name. 2 Copyright (C) 2003, 2004 g10 Code GmbH 3 4 This file is part of libgpg-error. 5 6 libgpg-error is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public License 8 as published by the Free Software Foundation; either version 2.1 of 9 the License, or (at your option) any later version. 10 11 libgpg-error is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with libgpg-error; if not, write to the Free 18 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 19 02111-1307, USA. */ 20 21 #if HAVE_CONFIG_H 22 #include <config.h> 23 #endif 24 25 #include <stddef.h> 26 27 #include <gpg-error.h> 28 29 #include "err-codes-sym.h" 30 #include "errnos-sym.h" 31 32 /* Return a pointer to a string containing the name of the symbol of 33 the error code in the error value ERR. Returns NULL if the error 34 code is not known. */ 35 const char * gpg_strerror_sym(gpg_error_t err)36gpg_strerror_sym (gpg_error_t err) 37 { 38 gpg_err_code_t code = gpg_err_code (err); 39 40 if (code & GPG_ERR_SYSTEM_ERROR) 41 { 42 int idx; 43 44 code &= ~GPG_ERR_SYSTEM_ERROR; 45 idx = errnos_msgidxof (code); 46 if (idx >= 0) 47 return errnos_msgstr + errnos_msgidx[idx]; 48 else 49 return NULL; 50 } 51 52 if (msgidxof (code) == msgidxof (GPG_ERR_CODE_DIM)) 53 return NULL; 54 55 return msgstr + msgidx[msgidxof (code)]; 56 } 57