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Diffstat (limited to 'usr.bin/col/README')
| -rw-r--r-- | usr.bin/col/README | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/usr.bin/col/README b/usr.bin/col/README deleted file mode 100644 index f673f3a..0000000 --- a/usr.bin/col/README +++ /dev/null @@ -1,48 +0,0 @@ -# @(#)README 8.1 (Berkeley) 6/6/93 - -col - filter out reverse line feeds. - -Options are: - -b do not print any backspaces (last character written is printed) - -f allow half line feeds in output, by default characters between - lines are pushed to the line below - -x do not compress spaces into tabs. - -l num keep (at least) num lines in memory, 128 are kept by default - -In the 32V source code to col(1) the default behavior was to NOT compress -spaces into tabs. There was a -h option which caused it to compress spaces -into tabs. There was no -x flag. - -The 32V documentation, however, was consistent with the SVID (actually, V7 -at the time) and documented a -x flag (as defined above) while making no -mention of a -h flag. Just before 4.3BSD went out, CSRG updated the manual -page to reflect the way the code worked. Suspecting that this was probably -the wrong way to go, this version adopts the SVID defaults, and no longer -documents the -h option. - -The S5 -p flag is not supported because it isn't clear what it does (looks -like a kludge introduced for a particular printer). - -Known differences between AT&T's col and this one (# is delimiter): - Input AT&T col this col - #\nabc\E7def\n# # def\nabc\r# # def\nabc\n# - #a# ## #a\n# - - last line always ends with at least one \n (or \E9) - #1234567 8\n# #1234567\t8\n# #1234567 8\n# - - single space not expanded to tab - -f #a\E8b\n# #ab\n# # b\E9\ra\n# - - can back up past first line (as far as you want) so you - *can* have a super script on the first line - #\E9_\ba\E8\nb\n# #\n_\bb\ba\n# #\n_\ba\bb\n# - - always print last character written to a position, - AT&T col claims to do this but doesn't. - -If a character is to be placed on a line that has been flushed, a warning -is produced (the AT&T col is silent). The -l flag (not in AT&T col) can -be used to increase the number of lines buffered to avoid the problem. - -General algorithm: a limited number of lines are buffered in a linked -list. When a printable character is read, it is put in the buffer of -the current line along with the column it's supposed to be in. When -a line is flushed, the characters in the line are sorted according to -column and then printed. |
