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Only advance the column position for printable characters, update manual

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page to emphasise that we count column positions, not characters.
This commit is contained in:
Tim J. Robbins 2002-06-17 12:11:05 +00:00
parent 4ff964978c
commit b887806d7b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=98342
2 changed files with 6 additions and 4 deletions
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4
usr.bin/fold/fold.1
View File

@ -48,7 +48,7 @@ The
.Nm
utility is a filter which folds the contents of the specified files,
or the standard input if no files are specified,
breaking the lines to have a maximum of 80 characters.
breaking the lines to have a maximum of 80 columns.
.Pp
The options are as follows:
.Bl -tag -width indent
@ -61,7 +61,7 @@ Fold line after the last blank character within the first
.Ar width
column positions (or bytes).
.It Fl w Ar width
Specify a line width to use instead of the default 80 characters.
Specify a line width to use instead of the default 80 columns.
.Ar Width
should be a multiple of 8 if tabs are present, or the tabs should
be expanded using

6
usr.bin/fold/fold.c
View File

@ -171,7 +171,8 @@ fold(width)
indx -= space;
col = 0;
for (i = 0; i < indx; i++)
col = newpos(col, buf[i]);
col = newpos(col,
(unsigned char)buf[i]);
} else {
fwrite(buf, 1, indx, stdout);
col = indx = 0;
@ -214,7 +215,8 @@ newpos(col, ch)
col = (col + 8) & ~7;
break;
default:
++col;
if (isprint(ch))
++col;
break;
}