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/*
* Function to wrap text to a fixed number of columns.
*
* Currently, assumes the text is in a single-byte character set,
* because it's only used to display host key prompt messages.
* Extending to Unicode and using wcwidth() could be an extension.
*/
#include "misc.h"
void wordwrap(BinarySink *bs, ptrlen input, size_t maxwid)
{
size_t col = 0;
while (true) {
ptrlen word = ptrlen_get_word(&input, " ");
if (!word.len)
break;
/* At the start of a line, any word is legal, even if it's
* overlong, because we have to display it _somehow_ and
* wrapping to the next line won't make it any better. */
if (col > 0) {
size_t newcol = col + 1 + word.len;
if (newcol <= maxwid) {
put_byte(bs, ' ');
col++;
} else {
put_byte(bs, '\n');
col = 0;
}
}
put_datapl(bs, word);
col += word.len;
}
}
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