76a2e658b7
supports it. Configuration test uses Alan Woodland's 'ax_tls.m4' from <http://autoconf-archive.cryp.to/ax_tls.html>.
130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
/*
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lib/error.c
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error functions and data
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COMEDILIB - Linux Control and Measurement Device Interface Library
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Copyright (C) 1997-2001 David A. Schleef <ds@schleef.org>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation, version 2.1
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of the License.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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*/
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#include "libinternal.h"
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#include <stdio.h>
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#include <string.h>
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char *__comedilib_error_strings[]={
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_s("No error"),
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_s("Unknown error"),
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_s("Bad comedi_t structure"),
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_s("Invalid subdevice"),
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_s("Invalid channel"),
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_s("Buffer overflow"),
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_s("Buffer underflow"),
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_s("Command not supported"),
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_s("Not supported"),
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};
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#define n_errors (sizeof(__comedilib_error_strings)/sizeof(void *))
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int __comedi_loglevel=1;
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TLS int __comedi_errno=0;
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EXPORT_ALIAS_DEFAULT(_comedi_loglevel,comedi_loglevel,0.7.18);
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int _comedi_loglevel(int loglevel)
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{
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int old_loglevel=__comedi_loglevel;
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__comedi_loglevel=loglevel;
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return old_loglevel;
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}
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EXPORT_ALIAS_DEFAULT(_comedi_errno,comedi_errno,0.7.18);
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int _comedi_errno(void)
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{
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return __comedi_errno;
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}
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EXPORT_ALIAS_DEFAULT(_comedi_strerror,comedi_strerror,0.7.18);
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const char* _comedi_strerror(int errnum)
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{
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if(errnum<COMEDI_NOERROR || errnum>=COMEDI_NOERROR+n_errors)
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return strerror(errnum);
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return GETTEXT(__comedilib_error_strings[errnum-COMEDI_NOERROR]);
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}
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EXPORT_ALIAS_DEFAULT(_comedi_perror,comedi_perror,0.7.18);
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void _comedi_perror(const char *s)
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{
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if(__comedi_loglevel>=3){
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fprintf(stderr,"comedi_perror(): __comedi_errno=%d\n",__comedi_errno);
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}
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if(!s)s="comedilib";
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fprintf(stderr,"%s: %s\n",s,comedi_strerror(__comedi_errno));
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}
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void libc_error(void)
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{
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__comedi_errno=errno;
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if(__comedi_loglevel>=2){
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comedi_perror("libc error");
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}
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}
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void internal_error(int err)
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{
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__comedi_errno=err;
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if(__comedi_loglevel>=2){
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comedi_perror("internal error");
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}
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}
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int valid_dev(comedi_t *it)
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{
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if(!it || it->magic!=COMEDILIB_MAGIC){
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internal_error(EBAD_CT);
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return 0;
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}
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return 1;
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}
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int valid_subd(comedi_t *it,unsigned int subd)
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{
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if(!valid_dev(it))return 0;
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if(subd>=it->n_subdevices){
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internal_error(EINVAL_SUBD);
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return 0;
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}
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return 1;
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}
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int valid_chan(comedi_t *it,unsigned int subd,unsigned int chan)
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{
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if(!valid_subd(it,subd))return 0;
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if(chan>=it->subdevices[subd].n_chan){
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internal_error(EINVAL_CHAN);
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return 0;
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}
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return 1;
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}
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