124 lines
2.5 KiB
C
124 lines
2.5 KiB
C
/*
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lib/error.c
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error handling routines
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 1997-8 David A. Schleef <ds@stm.lbl.gov>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, 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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#include <errno.h>
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char *__comedilib_error_strings[]={
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"No error",
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"Unknown error",
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"Bad comedi_t structure",
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"Invalid subdevice",
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"Invalid channel",
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};
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int __comedi_loglevel=1;
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int __comedi_errno=0;
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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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int comedi_errno(void)
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{
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return __comedi_errno;
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}
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char *comedi_strerror(int errnum)
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{
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if(errnum<COMEDILIB_NOERROR ||
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errnum>=COMEDILIB_NOERROR+sizeof(__comedilib_error_strings)
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/sizeof(__comedilib_error_strings[0]))
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return strerror(errnum);
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return __comedilib_error_strings[errnum-COMEDILIB_NOERROR];
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}
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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(COMEDILIB_BADDEV);
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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(COMEDILIB_BADSUBD);
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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(COMEDILIB_BADCHAN);
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return 0;
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}
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return 1;
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}
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