Small change to wc

[Julian Elischer]

Garrett Cooper wrote:
> On Fri, Dec 5, 2008 at 2:14 PM, Sheldon Givens <sheldon at sigsegv.ca> wrote:
>> Hello everyone,
>> In the process of migrating the last of a few Linux servers to FreeBSD, we
>> ran in to a bit of a snag with one of our scripts when BSD wc didn't have an
>> equivalent to the Linux -L. This flag tells wc to keep track of the longest
>> line in the input.
>>
>> Here's a little diff to add this functionality to BSD wc.
>>
>> With this patch, an additional parameter is added to output that shows the
>> length of the longest line
>>
>> My apologies if this is in the wrong format. I don't often post here.
>>
>> Happy Holidays,
>>
>> Sheldon Givens
>>
>>
>> ---snip---
>> 65,66c65,66
>> < uintmax_t tlinect, twordct, tcharct;
>> < int doline, doword, dochar, domulti;
>> ---
>>> uintmax_t tlinect, twordct, tcharct, tlongline;
>>> int doline, doword, dochar, domulti, dolongline;
>> 78c78
>> <       while ((ch = getopt(argc, argv, "clmw")) != -1)
>> ---
>>>       while ((ch = getopt(argc, argv, "clmwL")) != -1)
>> 93a94,96
>>>               case 'L':
>>>                       dolongline = 1;
>>>                       break;
>> 127a131,132
>>>               if (dolongline)
>>>                       (void)printf(" %7ju", tlongline);
>> 137c142
>> <       uintmax_t linect, wordct, charct;
>> ---
>>>       uintmax_t linect, wordct, charct, llcnt, tmpll;
>> 146c151
>> <       linect = wordct = charct = 0;
>> ---
>>>       linect = wordct = charct = llcnt = tmpll = 0;
>> 171c176,179
>> <                                       if (*p == '\n')
>> ---
>>>                                       if (*p == '\n') {
>>>                                               if (tmpll > llcnt)
>>>                                                       llcnt = tmpll;
>>>                                               tmpll = 0;
>> 172a181
>>>                                       } else { tmpll++; }
>> 179a189,192
>>>                       if (dolongline) {
>>>                               tlongline = llcnt;
>>>                               (void)printf(" %7ju", tlongline);
>>>                       }
>> 197c210
>> <                               return (0);
>> ---
>>>                       return (0);
>> 231a245
>>>                       tmpll++;
>> 234c248,251
>> <                       if (wch == L'\n')
>> ---
>>>                       if (wch == L'\n') {
>>>                               if (tmpll > llcnt)
>>>                                       llcnt = tmpll;
>>>                               tmpll = 0;
>> 235a253
>>>                       }
>> 258a277,280
>>>       if (dolongline) {
>>>               tlongline = llcnt;
>>>               (void)printf(" %7ju", llcnt - 1);
>>>       }
>> 266c288
>> <       (void)fprintf(stderr, "usage: wc [-clmw] [file ...]\n");
>> ---
>>>       (void)fprintf(stderr, "usage: wc [-clmwL] [file ...]\n");
>> ---unsnip---
> 
> What's the plus side of having this? I can accomplish the same with
> something like awk without the additional overhead, which would be
> guaranteed to be portable.

true, but this is a well known extension that people use and to tell 
the truth, I have no idea how I would do it in awk without reading a 
lot where in wc it's obvious from the synopsis.

> -Garrett
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