8c39e25220
Merge commit '2858419a0ee2b8f5827de72c00618bcd69ebc5fc' This update fixes the initialization of "scale" to 20 if started with -l and the initial statement leads to an error (e.g. contains a syntax error). Scale was initialized to 0 in that case. Another change is the support of job control in interactive mode with line editing enabled. The control characters have been interpreted as editing commands only, prior to this version. MFC after: 3 days
263 lines
8.2 KiB
C
263 lines
8.2 KiB
C
/*
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* *****************************************************************************
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2018-2021 Gavin D. Howard and contributors.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* *****************************************************************************
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*
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* Adapted from the following:
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*
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* linenoise.c -- guerrilla line editing library against the idea that a
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* line editing lib needs to be 20,000 lines of C code.
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*
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* You can find the original source code at:
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* http://github.com/antirez/linenoise
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*
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* You can find the fork that this code is based on at:
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* https://github.com/rain-1/linenoise-mob
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*
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* ------------------------------------------------------------------------
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*
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* This code is also under the following license:
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*
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* Copyright (c) 2010-2016, Salvatore Sanfilippo <antirez at gmail dot com>
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* Copyright (c) 2010-2013, Pieter Noordhuis <pcnoordhuis at gmail dot com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* *****************************************************************************
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*
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* Definitions for line history.
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*
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*/
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#ifndef BC_HISTORY_H
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#define BC_HISTORY_H
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#ifndef BC_ENABLE_HISTORY
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#define BC_ENABLE_HISTORY (1)
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#endif // BC_ENABLE_HISTORY
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#if BC_ENABLE_HISTORY
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#ifdef _WIN32
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#error History is not supported on Windows.
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#endif // _WIN32
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#include <stdbool.h>
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#include <stddef.h>
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#include <signal.h>
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#include <termios.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/select.h>
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#include <status.h>
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#include <vector.h>
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#include <read.h>
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#if BC_DEBUG_CODE
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#include <file.h>
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#endif // BC_DEBUG_CODE
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#define BC_HIST_DEF_COLS (80)
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#define BC_HIST_MAX_LEN (128)
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#define BC_HIST_MAX_LINE (4095)
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#define BC_HIST_SEQ_SIZE (64)
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#define BC_HIST_BUF_LEN(h) ((h)->buf.len - 1)
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#define BC_HIST_READ(s, n) (bc_history_read((s), (n)) == -1)
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#define BC_HIST_NEXT (false)
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#define BC_HIST_PREV (true)
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#if BC_DEBUG_CODE
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#define BC_HISTORY_DEBUG_BUF_SIZE (1024)
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#define lndebug(...) \
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do { \
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if (bc_history_debug_fp.fd == 0) { \
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bc_history_debug_buf = bc_vm_malloc(BC_HISTORY_DEBUG_BUF_SIZE); \
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bc_file_init(&bc_history_debug_fp, \
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open("/tmp/lndebug.txt", O_APPEND), \
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BC_HISTORY_DEBUG_BUF_SIZE); \
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bc_file_printf(&bc_history_debug_fp, \
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"[%zu %zu %zu] p: %d, rows: %d, " \
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"rpos: %d, max: %zu, oldmax: %d\n", \
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l->len, l->pos, l->oldcolpos, plen, rows, rpos, \
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l->maxrows, old_rows); \
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} \
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bc_file_printf(&bc_history_debug_fp, ", " __VA_ARGS__); \
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bc_file_flush(&bc_history_debug_fp); \
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} while (0)
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#else // BC_DEBUG_CODE
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#define lndebug(fmt, ...)
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#endif // BC_DEBUG_CODE
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#if !BC_ENABLE_PROMPT
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#define bc_history_line(h, vec, prompt) bc_history_line(h, vec)
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#define bc_history_raw(h, prompt) bc_history_raw(h)
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#define bc_history_edit(h, prompt) bc_history_edit(h)
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#endif // BC_ENABLE_PROMPT
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typedef enum BcHistoryAction {
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BC_ACTION_NULL = 0,
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BC_ACTION_CTRL_A = 1,
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BC_ACTION_CTRL_B = 2,
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BC_ACTION_CTRL_C = 3,
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BC_ACTION_CTRL_D = 4,
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BC_ACTION_CTRL_E = 5,
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BC_ACTION_CTRL_F = 6,
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BC_ACTION_CTRL_H = 8,
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BC_ACTION_TAB = 9,
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BC_ACTION_LINE_FEED = 10,
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BC_ACTION_CTRL_K = 11,
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BC_ACTION_CTRL_L = 12,
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BC_ACTION_ENTER = 13,
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BC_ACTION_CTRL_N = 14,
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BC_ACTION_CTRL_P = 16,
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BC_ACTION_CTRL_S = 19,
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BC_ACTION_CTRL_T = 20,
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BC_ACTION_CTRL_U = 21,
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BC_ACTION_CTRL_W = 23,
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BC_ACTION_CTRL_Z = 26,
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BC_ACTION_ESC = 27,
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BC_ACTION_BACKSPACE = 127
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} BcHistoryAction;
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/**
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* This represents the state during line editing. We pass this state
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* to functions implementing specific editing functionalities.
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*/
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typedef struct BcHistory {
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/// Edited line buffer.
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BcVec buf;
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/// The history.
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BcVec history;
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/// Any material printed without a trailing newline.
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BcVec extras;
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#if BC_ENABLE_PROMPT
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/// Prompt to display.
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const char *prompt;
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/// Prompt length.
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size_t plen;
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#endif // BC_ENABLE_PROMPT
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/// Prompt column length.
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size_t pcol;
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/// Current cursor position.
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size_t pos;
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/// Previous refresh cursor column position.
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size_t oldcolpos;
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/// Number of columns in terminal.
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size_t cols;
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/// The history index we are currently editing.
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size_t idx;
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/// The original terminal state.
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struct termios orig_termios;
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/// These next three are here because pahole found a 4 byte hole here.
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/// This is to signal that there is more, so we don't process yet.
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bool stdin_has_data;
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/// Whether we are in rawmode.
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bool rawMode;
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/// Whether the terminal is bad.
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bool badTerm;
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/// This is to check if stdin has more data.
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fd_set rdset;
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/// This is to check if stdin has more data.
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struct timespec ts;
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/// This is to check if stdin has more data.
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sigset_t sigmask;
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} BcHistory;
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BcStatus bc_history_line(BcHistory *h, BcVec *vec, const char *prompt);
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void bc_history_init(BcHistory *h);
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void bc_history_free(BcHistory *h);
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extern const char *bc_history_bad_terms[];
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extern const char bc_history_tab[];
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extern const size_t bc_history_tab_len;
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extern const char bc_history_ctrlc[];
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extern const uint32_t bc_history_wchars[][2];
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extern const size_t bc_history_wchars_len;
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extern const uint32_t bc_history_combo_chars[];
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extern const size_t bc_history_combo_chars_len;
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#if BC_DEBUG_CODE
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extern BcFile bc_history_debug_fp;
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extern char *bc_history_debug_buf;
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void bc_history_printKeyCodes(BcHistory* l);
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#endif // BC_DEBUG_CODE
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#endif // BC_ENABLE_HISTORY
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#endif // BC_HISTORY_H
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