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#include <stdio.h>
#include <comedilib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <getopt.h>
#include <ctype.h>
#include <math.h>
#include <sys/time.h>
#include <string.h>
#include "comedi_test.h"
int test_bufconfig_without_cmd(void);
int test_bufconfig_with_cmd(void);
int test_bufconfig(void)
{
int flags;
flags = comedi_get_subdevice_flags(device,subdevice);
if(flags&SDF_CMD){
return test_bufconfig_with_cmd();
}else{
return test_bufconfig_without_cmd();
}
}
int test_bufconfig_without_cmd(void)
{
int ret;
ret = comedi_get_buffer_size(device,subdevice);
if(ret<0){
if(errno==ENODEV){
printf("got ENODEV, good\n");
}else{
printf("E: comedi_get_buffer_size: %s\n",
strerror(errno));
}
}else if(ret==0){
printf("buffer length is 0, good\n");
}else{
printf("E: comedi_get_buffer_size returned %d\n",ret);
}
return 0;
}
int test_bufconfig_with_cmd(void)
{
int ret;
int len;
int maxlen;
ret = comedi_get_buffer_size(device,subdevice);
if(ret<0){
printf("E: comedi_get_buffer_size: %s\n",strerror(errno));
}else{
printf("buffer size %d\n",ret);
}
maxlen = comedi_get_max_buffer_size(device,subdevice);
if(maxlen<0){
printf("E: comedi_get_max_buffer_size: %s\n",strerror(errno));
}else{
printf("max buffer size %d\n",maxlen);
}
len=4096;
printf("setting buffer size to %d\n",len);
ret = comedi_set_buffer_size(device,subdevice,len);
if(ret<0){
printf("E: comedi_set_buffer_size: %s\n",strerror(errno));
}else{
printf("buffer size set to %d\n",ret);
}
ret = comedi_get_buffer_size(device,subdevice);
if(ret<0){
printf("E: comedi_get_buffer_size: %s\n",strerror(errno));
}else{
printf("buffer size now at %d\n",ret);
if(ret != len){
printf("E: buffer size didn't get set: %d (expected %d)\n",
ret,len);
}
}
len=maxlen+4096;
printf("setting buffer size past limit, %d\n",len);
ret = comedi_set_buffer_size(device,subdevice,len);
if(ret<0){
if(errno==EPERM){
printf("got EPERM, good\n");
}else{
printf("E: wrong error comedi_set_buffer_size: %s",
strerror(errno));
}
}else{
printf("E: comedi_set_buffer_size: didn't get error\n");
}
len=maxlen;
printf("setting buffer size to max, %d\n",len);
ret = comedi_set_buffer_size(device,subdevice,len);
if(ret<0){
printf("E: comedi_set_buffer_size: %s\n",strerror(errno));
}else{
printf("buffer size now at %d\n",ret);
if(ret != len){
printf("E: buffer size didn't get set: %d (expected %d)\n",
ret,len);
}
}
return 0;
}
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