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/* $NetBSD: literal.c,v 1.5 2019/07/23 13:10:11 christos 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) #if 0 __RCSID("$NetBSD: literal.c,v 1.5 2019/07/23 13:10:11 christos Exp $"); #endif #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, (size_t)(w - n), buf[i]); n += ct_encode_char(b + n, (size_t)(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]; }