diff options
Diffstat (limited to 'contrib/bc/include/history.h')
| -rw-r--r-- | contrib/bc/include/history.h | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/contrib/bc/include/history.h b/contrib/bc/include/history.h new file mode 100644 index 000000000000..c632bc81a2a0 --- /dev/null +++ b/contrib/bc/include/history.h @@ -0,0 +1,258 @@ +/* + * ***************************************************************************** + * + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2018-2020 Gavin D. Howard and contributors. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * * 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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. + * + * ***************************************************************************** + * + * Adapted from the following: + * + * linenoise.c -- guerrilla line editing library against the idea that a + * line editing lib needs to be 20,000 lines of C code. + * + * You can find the original source code at: + * http://github.com/antirez/linenoise + * + * You can find the fork that this code is based on at: + * https://github.com/rain-1/linenoise-mob + * + * ------------------------------------------------------------------------ + * + * This code is also under the following license: + * + * Copyright (c) 2010-2016, Salvatore Sanfilippo <antirez at gmail dot com> + * Copyright (c) 2010-2013, Pieter Noordhuis <pcnoordhuis at gmail dot com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * 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 COPYRIGHT HOLDERS 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 COPYRIGHT + * HOLDER 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. + * + * ***************************************************************************** + * + * Definitions for line history. + * + */ + +#ifndef BC_HISTORY_H +#define BC_HISTORY_H + +#ifndef BC_ENABLE_HISTORY +#define BC_ENABLE_HISTORY (1) +#endif // BC_ENABLE_HISTORY + +#if BC_ENABLE_HISTORY + +#ifdef _WIN32 +#error History is not supported on Windows. +#endif // _WIN32 + +#include <stdbool.h> +#include <stddef.h> + +#include <signal.h> + +#include <termios.h> +#include <time.h> +#include <unistd.h> +#include <sys/select.h> + +#include <status.h> +#include <vector.h> +#include <read.h> + +#if BC_DEBUG_CODE +#include <file.h> +#endif // BC_DEBUG_CODE + +#define BC_HIST_DEF_COLS (80) +#define BC_HIST_MAX_LEN (128) +#define BC_HIST_MAX_LINE (4095) +#define BC_HIST_SEQ_SIZE (64) + +#define BC_HIST_BUF_LEN(h) ((h)->buf.len - 1) +#define BC_HIST_READ(s, n) (bc_history_read((s), (n)) == -1) + +#define BC_HIST_NEXT (false) +#define BC_HIST_PREV (true) + +#if BC_DEBUG_CODE + +#define BC_HISTORY_DEBUG_BUF_SIZE (1024) + +#define lndebug(...) \ + do { \ + if (bc_history_debug_fp.fd == 0) { \ + bc_history_debug_buf = bc_vm_malloc(BC_HISTORY_DEBUG_BUF_SIZE); \ + bc_file_init(&bc_history_debug_fp, \ + open("/tmp/lndebug.txt", O_APPEND), \ + BC_HISTORY_DEBUG_BUF_SIZE); \ + bc_file_printf(&bc_history_debug_fp, \ + "[%zu %zu %zu] p: %d, rows: %d, " \ + "rpos: %d, max: %zu, oldmax: %d\n", \ + l->len, l->pos, l->oldcolpos, plen, rows, rpos, \ + l->maxrows, old_rows); \ + } \ + bc_file_printf(&bc_history_debug_fp, ", " __VA_ARGS__); \ + bc_file_flush(&bc_history_debug_fp); \ + } while (0) +#else // BC_DEBUG_CODE +#define lndebug(fmt, ...) +#endif // BC_DEBUG_CODE + +#if !BC_ENABLE_PROMPT +#define bc_history_line(h, vec, prompt) bc_history_line(h, vec) +#define bc_history_raw(h, prompt) bc_history_raw(h) +#define bc_history_edit(h, prompt) bc_history_edit(h) +#endif // BC_ENABLE_PROMPT + +typedef enum BcHistoryAction { + + BC_ACTION_NULL = 0, + BC_ACTION_CTRL_A = 1, + BC_ACTION_CTRL_B = 2, + BC_ACTION_CTRL_C = 3, + BC_ACTION_CTRL_D = 4, + BC_ACTION_CTRL_E = 5, + BC_ACTION_CTRL_F = 6, + BC_ACTION_CTRL_H = 8, + BC_ACTION_TAB = 9, + BC_ACTION_LINE_FEED = 10, + BC_ACTION_CTRL_K = 11, + BC_ACTION_CTRL_L = 12, + BC_ACTION_ENTER = 13, + BC_ACTION_CTRL_N = 14, + BC_ACTION_CTRL_P = 16, + BC_ACTION_CTRL_T = 20, + BC_ACTION_CTRL_U = 21, + BC_ACTION_CTRL_W = 23, + BC_ACTION_CTRL_Z = 26, + BC_ACTION_ESC = 27, + BC_ACTION_BACKSPACE = 127 + +} BcHistoryAction; + +/** + * This represents the state during line editing. We pass this state + * to functions implementing specific editing functionalities. + */ +typedef struct BcHistory { + + /// Edited line buffer. + BcVec buf; + + /// The history. + BcVec history; + +#if BC_ENABLE_PROMPT + /// Prompt to display. + const char *prompt; + + /// Prompt length. + size_t plen; +#endif // BC_ENABLE_PROMPT + + /// Prompt column length. + size_t pcol; + + /// Current cursor position. + size_t pos; + + /// Previous refresh cursor column position. + size_t oldcolpos; + + /// Number of columns in terminal. + size_t cols; + + /// The history index we are currently editing. + size_t idx; + + /// The original terminal state. + struct termios orig_termios; + + /// These next three are here because pahole found a 4 byte hole here. + + /// This is to signal that there is more, so we don't process yet. + bool stdin_has_data; + + /// Whether we are in rawmode. + bool rawMode; + + /// Whether the terminal is bad. + bool badTerm; + + /// This is to check if stdin has more data. + fd_set rdset; + + /// This is to check if stdin has more data. + struct timespec ts; + + /// This is to check if stdin has more data. + sigset_t sigmask; + +} BcHistory; + +BcStatus bc_history_line(BcHistory *h, BcVec *vec, const char *prompt); + +void bc_history_init(BcHistory *h); +void bc_history_free(BcHistory *h); + +extern const char *bc_history_bad_terms[]; +extern const char bc_history_tab[]; +extern const size_t bc_history_tab_len; +extern const char bc_history_ctrlc[]; +extern const uint32_t bc_history_wchars[][2]; +extern const size_t bc_history_wchars_len; +extern const uint32_t bc_history_combo_chars[]; +extern const size_t bc_history_combo_chars_len; +#if BC_DEBUG_CODE +extern BcFile bc_history_debug_fp; +extern char *bc_history_debug_buf; +void bc_history_printKeyCodes(BcHistory* l); +#endif // BC_DEBUG_CODE + +#endif // BC_ENABLE_HISTORY + +#endif // BC_HISTORY_H |