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/*
* Copyright (c) Kristaps Dzonsons <kristaps@bsd.lv>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#if HAVE_SYS_QUEUE
# include <sys/queue.h>
#endif
#include <ctype.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "lowdown.h"
#include "extern.h"
/*
* Convert newlines to spaces (if "oneline") and elide control
* characters. If "oneline" and a newline follows a period, it's
* converted to two spaces. Otherwise, just one space.
* Return zero on failure (memory), non-zero on success.
*/
int
lowdown_gemini_esc(struct lowdown_buf *ob, const char *buf, size_t sz,
int oneline)
{
size_t i, start = 0;
unsigned char ch;
for (i = 0; i < sz; i++) {
ch = (unsigned char)buf[i];
if (ch == '\n' && oneline) {
if (!hbuf_put(ob, buf + start, i - start))
return 0;
if (ob->size &&
ob->data[ob->size - 1] == '.' &&
!hbuf_putc(ob, ' '))
return 0;
if (!hbuf_putc(ob, ' '))
return 0;
start = i + 1;
} else if (ch < 0x80 && iscntrl(ch)) {
if (!hbuf_put(ob, buf + start, i - start))
return 0;
start = i + 1;
}
}
if (start < sz && !hbuf_put(ob, buf + start, sz - start))
return 0;
return 1;
}
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