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-rw-r--r--toys/pending/fold.c51
1 files changed, 22 insertions, 29 deletions
diff --git a/toys/pending/fold.c b/toys/pending/fold.c
index 2291308f..80bb2413 100644
--- a/toys/pending/fold.c
+++ b/toys/pending/fold.c
@@ -12,13 +12,13 @@ config FOLD
help
usage: fold [-bsu] [-w WIDTH] [FILE...]
- Folds (wraps) or unfolds FILE or stdin by adding or removing newlines.
+ Folds (wraps) or unfolds ascii text by adding or removing newlines.
Default line width is 80 columns for folding and infinite for unfolding.
- -b Fold based on bytes instead of columns
- -s Fold/unfold at whitespace boundaries if possible
- -u Unfold text (and refold if -w is given)
- -w Set lines to WIDTH columns or bytes
+ -b Fold based on bytes instead of columns
+ -s Fold/unfold at whitespace boundaries if possible
+ -u Unfold text (and refold if -w is given)
+ -w Set lines to WIDTH columns or bytes
*/
#define FOR_fold
@@ -28,27 +28,23 @@ GLOBALS(
int width;
)
+// wcwidth mbrtowc
void do_fold(int fd, char *name)
{
- char *buf;
- int bufsz, pos, len = 0, maxlen, split;
+ int bufsz, len = 0, maxlen;
- if (toys.optflags & FLAG_w)
- maxlen = TT.width;
- else if (toys.optflags & FLAG_u)
- maxlen = 0;
- else
- maxlen = 80;
+ if (toys.optflags & FLAG_w) maxlen = TT.width;
+ else if (toys.optflags & FLAG_u) maxlen = 0;
+ else maxlen = 80;
while ((bufsz = read(fd, toybuf, sizeof(toybuf))) > 0) {
- buf = toybuf;
- pos = 0;
- split = -1;
+ char *buf = toybuf;
+ int pos = 0, split = -1;
while (pos < bufsz) {
switch (buf[pos]) {
case '\n':
- //print everything but the \n, then move on to the next buffer
+ // print everything but the \n, then move on to the next buffer
if ((toys.optflags & FLAG_u) && buf[pos-1] != '\n'
&& buf[pos+1] != '\n') {
xwrite(1, buf, pos);
@@ -56,31 +52,30 @@ void do_fold(int fd, char *name)
buf += pos + 1;
pos = 0;
split = -1;
- }
- //reset len, FLAG_b or not; just print multiple lines at once
- else len = 0;
+ // reset len, FLAG_b or not; just print multiple lines at once
+ } else len = 0;
break;
case '\b':
- //len cannot be negative; not allowed to wrap after backspace
+ // len cannot be negative; not allowed to wrap after backspace
if (toys.optflags & FLAG_b) len++;
else if (len > 0) len--;
break;
case '\r':
- //not allowed to wrap after carriage return
+ // not allowed to wrap after carriage return
if (toys.optflags & FLAG_b) len++;
else len = 0;
break;
case '\t':
- //round to 8, but we add one after falling through
- //(because of whitespace, but it also takes care of FLAG_b)
- if (!(toys.optflags & FLAG_b)) len = (len & -8) + 7;
+ // round to 8, but we add one after falling through
+ // (because of whitespace, but it also takes care of FLAG_b)
+ if (!(toys.optflags & FLAG_b)) len = (len & ~7) + 7;
case ' ':
split = pos;
default:
len++;
}
- //we don't want to double up \n; not allowed to wrap before \b
+ // we don't want to double up \n; not allowed to wrap before \b
if (maxlen > 0 && len >= maxlen && buf[pos+1] != '\n' && buf[pos+1] != '\b') {
if (!(toys.optflags & FLAG_s) || split < 0) split = pos;
xwrite(1, buf, split + 1);
@@ -89,9 +84,7 @@ void do_fold(int fd, char *name)
buf += split + 1;
len = pos = 0;
split = -1;
- } else {
- pos++;
- }
+ } else pos++;
}
xwrite(1, buf, bufsz);
}