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kusanagi |
5.1 |
/************************************************************ |
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* 20/9/2005 modified by david fedele to read buffer-data |
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* instead raw-data-file |
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************************************************************** |
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kusanagi |
1.1 |
* include needed system headers |
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*/ |
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#include <stdio.h> /* include standard i/o library */ |
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#include <stdlib.h> /* include standard library */ |
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#include <string.h> /* include string library */ |
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#include <unistd.h> /* include unix standard library */ |
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#include <sys/types.h> /* */ |
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#include <sys/stat.h> /* */ |
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#include <fcntl.h> /* */ |
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#include <errno.h> /* error simbol definitions */ |
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#include <time.h> /* system time definitions */ |
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#include <math.h> /* math library */ |
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kusanagi |
5.1 |
/************************************************************ |
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* 20/9/2005 modified by david fedele */ |
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/* void readsig_(float *sig_buf, int *error, int *fd) */ |
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void getbytes_(int *nbytes, char *buffer, int *p, unsigned int *value); |
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kusanagi |
1.1 |
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kusanagi |
5.1 |
void readsig_(float *sig_buf, int *error,char *buffer, int *len,int *curpos) |
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kusanagi |
1.1 |
{ |
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int i; |
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kusanagi |
5.1 |
unsigned int word; |
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unsigned int decimals,units; |
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unsigned int sig_buf_temp[1024]; |
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kusanagi |
1.1 |
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*error=0; |
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kusanagi |
5.1 |
/************************************************************ |
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* 20/9/2005 modified by david fedele */ |
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/* int nread; */ |
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/* /\*** read the buffer ***\/ */ |
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/* nread=read(*fd, sig_buf_temp, 2*1024); */ |
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/* if( nread==0 ) { */ |
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/* printf("readsig: Unexpected end of file %d at %d \n",*fd,nread); */ |
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/* *error=1; */ |
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/* return ; */ |
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/* } */ |
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/* if ( nread != 2*1024) { */ |
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/* printf("readsig: Error on reading: nread = %d \n",nread); */ |
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/* *error=-1; */ |
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/* return ; */ |
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/* } */ |
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/* /\*** correct byte ***\/ //endianess... */ |
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/* for(i=0; i<1024; i++) { */ |
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/* word = sig_buf_temp[i]; */ |
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/* sig_buf_temp[i] = ( (word&0x00ff) << 8 ) | ( (word&0xff00) >> 8 ); */ |
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/* } */ |
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int nbytes2=2; |
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char *buff=buffer; |
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kusanagi |
6.1 |
if( *curpos+1024>*len ) { |
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kusanagi |
5.1 |
printf("readsig: Unexpected end of file \n"); |
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kusanagi |
1.1 |
*error=1; |
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return ; |
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} |
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kusanagi |
6.1 |
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for(i=0; i<1024; i++) |
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getbytes_(&nbytes2,buff,curpos,&sig_buf_temp[i]); |
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kusanagi |
5.1 |
/*****************************************************************/ |
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kusanagi |
1.1 |
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/***interpreta*/ |
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for(i=0; i<1024; i++) { |
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word = sig_buf_temp[i]; |
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units = ( (word >> 4) & 0x0fff ) ; |
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decimals = (word & 0x000f) ; |
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sig_buf[i] = (float)units + (float)decimals / 16.; |
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// printf("%i %i %i %f \n",i,units,decimals,sig_buf[i]); |
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} |
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// for( i=0; i<1024; i++) printf("%x \n",sig_buf[i]);//??? |
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return; |
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} |
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