🚀 go-pugleaf

tomc@siesoft.co.uk (Tom Crossland) writes:
> 
> hermann@uran.informatik.uni-bonn.de (Hermann Stamm) writes:
> :    - insert a '\n' after each ';' found
> 
> What about things like for(a=1; a<MAX; a*=2)...
> would become
> 
> for(a=1;
> a<MAX;
> a*=2)...
> 
> It should still compile, but it's hardly "beautified"
> 

Perhaps this is not beautified, but it 
  a) works even on C-Sources with very long lines 
  b) can be beautified by a standard beautifier in
     a second step
and it is a great help in debugging of lines with length
greater than i.e. xterm can capture.

Is there any fixed upper limit for line-length in the 
ANSI-C-standard ?

The more important question I think, is, what is the reason for 
standard C-beautifiers to break -> in the middle for long lines
(resulting in a compiler-error).
Do they use a fixed length buffer for handling logical lines?

--------------------------------------------------------------

fjh@munta.cs.mu.OZ.AU (Fergus James HENDERSON) writes:
> hermann@uran.informatik.uni-bonn.de (Hermann Stamm) writes:
> 
> >I wrote my own simple "C-beautifier", which simply does the
> >following:
> >
> >   - discard empty lines
> >   - insert a '\n' after each ';' found
> >
> >This works fine, but now I have 2 questions:
> >
> >  1. Is this a correct transformation of any C-Source ?
> 
> No. You need to make sure that you don't insert newlines into string
> or character literals that may contain semi-colons.

Sorry, you are right!
Below you can find the little prog I am using. It detects both,
if a ; is inside "..." and inside ' ' . If so, it doesn't insert
the '\n' after the ; otherwise it does.

The question now is, does the below program correctly transforms
any compilable C-source into also compilable C-source.


Bye,

   Hermann.

---------------------------------------------------------------

#include <stdio.h>
#include <stdlib.h>

int main(int argc,char *argv[])
  {
  FILE *source,*target;
  char c;
  long z1,z2,l;

  if (argc!=3)
    {
    fprintf(stderr,"Formtat:  cb infile outfile\n");
    exit(1);
    }

  if (NULL == (source = fopen(argv[1],"r")))
    {
    fprintf(stderr,"file not found !\n");
    exit(2);
    }

  if (NULL == (target = fopen(argv[2],"w")))
    {
    fprintf(stderr,"target cannot be created !\n");
    exit(3);
    }

  z1=z2=l=0;
  while ((c=getc(source))!=-1)
    {
    if (c==34) z1^=1;
    if (c==39) z2^=1;
    if (c=='\n')
      {
      if (l>0)
        {
        putc(c,target);
        l=0;
        }
      }
    else
      {
      putc(c,target);
      l++;
      if ((c==';') && (z1==0) && (z2==0))
        {
        putc('\n',target);
        l=0;
        }
      }
    }

  fclose(target);
  fclose(source);

  return(0);
  }