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Diffstat (limited to 'literal.c')
| -rw-r--r-- | literal.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/literal.c b/literal.c new file mode 100644 index 000000000000..6c2496f2f044 --- /dev/null +++ b/literal.c @@ -0,0 +1,136 @@ +/* $NetBSD: literal.c,v 1.3 2017/06/30 20:26:52 kre Exp $ */ + +/*- + * Copyright (c) 2017 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "config.h" +#if !defined(lint) && !defined(SCCSID) +__RCSID("$NetBSD: literal.c,v 1.3 2017/06/30 20:26:52 kre Exp $"); +#endif /* not lint && not SCCSID */ + +/* + * literal.c: Literal sequences handling. + */ +#include <assert.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "el.h" + +libedit_private void +literal_init(EditLine *el) +{ + el_literal_t *l = &el->el_literal; + + memset(l, 0, sizeof(*l)); +} + +libedit_private void +literal_end(EditLine *el) +{ + literal_clear(el); +} + +libedit_private void +literal_clear(EditLine *el) +{ + el_literal_t *l = &el->el_literal; + size_t i; + + if (l->l_len == 0) + return; + + for (i = 0; i < l->l_idx; i++) + el_free(l->l_buf[i]); + el_free(l->l_buf); + l->l_buf = NULL; + l->l_len = 0; + l->l_idx = 0; +} + +libedit_private wint_t +literal_add(EditLine *el, const wchar_t *buf, const wchar_t *end, int *wp) +{ + el_literal_t *l = &el->el_literal; + size_t i, len; + ssize_t w, n; + char *b; + + w = wcwidth(end[1]); /* column width of the visible char */ + *wp = (int)w; + + if (w <= 0) /* we require something to be printed */ + return 0; + + len = (size_t)(end - buf); + for (w = 0, i = 0; i < len; i++) + w += ct_enc_width(buf[i]); + w += ct_enc_width(end[1]); + + b = el_malloc((size_t)(w + 1)); + if (b == NULL) + return 0; + + for (n = 0, i = 0; i < len; i++) + n += ct_encode_char(b + n, w - n, buf[i]); + n += ct_encode_char(b + n, w - n, end[1]); + b[n] = '\0'; + + /* + * Then save this literal string in the list of such strings, + * and return a "magic character" to put into the terminal buffer. + * When that magic char is 'printed' the saved string (which includes + * the char that belongs in that position) gets sent instead. + */ + if (l->l_idx == l->l_len) { + char **bp; + + l->l_len += 4; + bp = el_realloc(l->l_buf, sizeof(*l->l_buf) * l->l_len); + if (bp == NULL) { + free(b); + l->l_len -= 4; + return 0; + } + l->l_buf = bp; + } + l->l_buf[l->l_idx++] = b; + return EL_LITERAL | (wint_t)(l->l_idx - 1); +} + +libedit_private const char * +literal_get(EditLine *el, wint_t idx) +{ + el_literal_t *l = &el->el_literal; + + assert(idx & EL_LITERAL); + idx &= ~EL_LITERAL; + assert(l->l_idx > (size_t)idx); + return l->l_buf[idx]; +} |