tidy.c

output formatter - Daniel Clemmensen, 02/24/2019 10:02 am

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/*tidy.c -- clean up the .tsv output from tshark for a serial-over-USB
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  session. input from stdin, output to stdout.
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  Copyright (c) 2019 Dan Clemmensen, licensed to you under GPL v3.
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  input lines:
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    source\tinfo\tdata\n
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  for each line:
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     get dirchar (first char of source is 'h' or not),
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     get bulk char (fourth char of info is 'B' or not),
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     get start of data
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     If dir changed,
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       print existing buffer and start a new one
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     remove the colons from the data and append to buffer
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  at end, print buffer
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  output line starts with '<' or '>' for direction, followed by the hex chars
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  sent or received.
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*/
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#include <strings.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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static char separator = '\t';
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int main()
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{
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  char buff[1000];
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  char *inpt=buff;
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  size_t buflen=1000;
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  int len;
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  char outbuff[1000];
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  int dir=2;    //2= unknown, 1=from host, 0= to host
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  int newdir=0;
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  int ndx=0;
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  char *pt;
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  char chr;
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  while (-1!=(len=getline(&inpt,&buflen,stdin)))
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  { if(buff[len-1]=='\n') 
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      buff[len-1]='\0';
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    pt=strchr(buff,separator);
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    if((pt[5]=='B') && (0!=*(pt=1+strchr(pt+1,separator))))
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    { newdir= buff[0]=='h';
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      if(newdir!=dir)
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      { if (ndx)
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        { outbuff[ndx]=0;
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          printf("%c%s\n",dir?'>':'<',outbuff);
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        }
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        dir=newdir;
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        ndx=0;
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      }
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      while(0!=(chr=*pt++))
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        if(chr!=':')
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          outbuff[ndx++]=chr;
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    }  
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  }
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  outbuff[ndx]=0;
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  if(ndx)
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    printf("%c%s\n",dir?'>':'<',outbuff);  //last line
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  return 0;
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}
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