/* * ***************************************************************************** * * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2018-2021 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 * Copyright (c) 2010-2013, Pieter Noordhuis * * 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 #include #include #include #include #include #include #include #include #include #if BC_DEBUG_CODE #include #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