Haibo Huang | 892b8b3 | 2019-11-25 15:32:55 -0800 | [diff] [blame] | 1 | /* $NetBSD: literal.c,v 1.5 2019/07/23 13:10:11 christos Exp $ */ |
Haibo Huang | 5691f77 | 2019-08-28 15:21:20 -0700 | [diff] [blame] | 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2017 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Christos Zoulas. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include "config.h" |
| 33 | #if !defined(lint) && !defined(SCCSID) |
| 34 | #if 0 |
Haibo Huang | 892b8b3 | 2019-11-25 15:32:55 -0800 | [diff] [blame] | 35 | __RCSID("$NetBSD: literal.c,v 1.5 2019/07/23 13:10:11 christos Exp $"); |
Haibo Huang | 5691f77 | 2019-08-28 15:21:20 -0700 | [diff] [blame] | 36 | #endif |
| 37 | #endif /* not lint && not SCCSID */ |
| 38 | |
| 39 | /* |
| 40 | * literal.c: Literal sequences handling. |
| 41 | */ |
| 42 | #include <assert.h> |
| 43 | #include <stdio.h> |
| 44 | #include <stdlib.h> |
| 45 | #include <string.h> |
| 46 | #include "el.h" |
| 47 | |
| 48 | libedit_private void |
| 49 | literal_init(EditLine *el) |
| 50 | { |
| 51 | el_literal_t *l = &el->el_literal; |
| 52 | |
| 53 | memset(l, 0, sizeof(*l)); |
| 54 | } |
| 55 | |
| 56 | libedit_private void |
| 57 | literal_end(EditLine *el) |
| 58 | { |
| 59 | literal_clear(el); |
| 60 | } |
| 61 | |
| 62 | libedit_private void |
| 63 | literal_clear(EditLine *el) |
| 64 | { |
| 65 | el_literal_t *l = &el->el_literal; |
| 66 | size_t i; |
| 67 | |
| 68 | if (l->l_len == 0) |
| 69 | return; |
| 70 | |
| 71 | for (i = 0; i < l->l_idx; i++) |
| 72 | el_free(l->l_buf[i]); |
| 73 | el_free(l->l_buf); |
| 74 | l->l_buf = NULL; |
| 75 | l->l_len = 0; |
| 76 | l->l_idx = 0; |
| 77 | } |
| 78 | |
| 79 | libedit_private wint_t |
| 80 | literal_add(EditLine *el, const wchar_t *buf, const wchar_t *end, int *wp) |
| 81 | { |
| 82 | el_literal_t *l = &el->el_literal; |
| 83 | size_t i, len; |
| 84 | ssize_t w, n; |
| 85 | char *b; |
| 86 | |
| 87 | w = wcwidth(end[1]); /* column width of the visible char */ |
| 88 | *wp = (int)w; |
| 89 | |
| 90 | if (w <= 0) /* we require something to be printed */ |
| 91 | return 0; |
| 92 | |
| 93 | len = (size_t)(end - buf); |
| 94 | for (w = 0, i = 0; i < len; i++) |
| 95 | w += ct_enc_width(buf[i]); |
| 96 | w += ct_enc_width(end[1]); |
| 97 | |
| 98 | b = el_malloc((size_t)(w + 1)); |
| 99 | if (b == NULL) |
| 100 | return 0; |
| 101 | |
| 102 | for (n = 0, i = 0; i < len; i++) |
Haibo Huang | 892b8b3 | 2019-11-25 15:32:55 -0800 | [diff] [blame] | 103 | n += ct_encode_char(b + n, (size_t)(w - n), buf[i]); |
| 104 | n += ct_encode_char(b + n, (size_t)(w - n), end[1]); |
Haibo Huang | 5691f77 | 2019-08-28 15:21:20 -0700 | [diff] [blame] | 105 | b[n] = '\0'; |
| 106 | |
| 107 | /* |
| 108 | * Then save this literal string in the list of such strings, |
| 109 | * and return a "magic character" to put into the terminal buffer. |
| 110 | * When that magic char is 'printed' the saved string (which includes |
| 111 | * the char that belongs in that position) gets sent instead. |
| 112 | */ |
| 113 | if (l->l_idx == l->l_len) { |
| 114 | char **bp; |
| 115 | |
| 116 | l->l_len += 4; |
| 117 | bp = el_realloc(l->l_buf, sizeof(*l->l_buf) * l->l_len); |
| 118 | if (bp == NULL) { |
| 119 | free(b); |
| 120 | l->l_len -= 4; |
| 121 | return 0; |
| 122 | } |
| 123 | l->l_buf = bp; |
| 124 | } |
| 125 | l->l_buf[l->l_idx++] = b; |
| 126 | return EL_LITERAL | (wint_t)(l->l_idx - 1); |
| 127 | } |
| 128 | |
| 129 | libedit_private const char * |
| 130 | literal_get(EditLine *el, wint_t idx) |
| 131 | { |
| 132 | el_literal_t *l = &el->el_literal; |
| 133 | |
| 134 | assert(idx & EL_LITERAL); |
| 135 | idx &= ~EL_LITERAL; |
| 136 | assert(l->l_idx > (size_t)idx); |
| 137 | return l->l_buf[idx]; |
| 138 | } |