78bc019d22
This version adds support for command line editing and history using the libedit or readline libraries in addition to the line editing features available in previous versions. The version in the base system is configured to use libedit. This allows to choose between emacs and vi line editing commands and to use command overrides via a ~/.editrc file. Merge commit 'bd54318046bfee055b140705a5cfd4148e78da07' PR: 264010 MFC after: 2 weeks
87 lines
2.9 KiB
C
87 lines
2.9 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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* Code to handle special I/O for bc.
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*
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*/
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#ifndef BC_READ_H
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#define BC_READ_H
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#include <stdlib.h>
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#include <status.h>
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#include <vector.h>
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/**
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* Returns true if @a c is a non-ASCII (invalid) char.
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* @param c The character to test.
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* @return True if @a c is an invalid char.
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*/
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#define BC_READ_BIN_CHAR(c) (!(c))
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/**
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* Reads a line from stdin after printing prompt, if desired.
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* @param vec The vector to put the stdin data into.
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* @param prompt The prompt to print, if desired.
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*/
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BcStatus
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bc_read_line(BcVec* vec, const char* prompt);
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/**
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* Read a file and return a buffer with the data. The buffer must be freed by
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* the caller.
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* @param path The path to the file to read.
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*/
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char*
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bc_read_file(const char* path);
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/**
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* Helper function for reading characters from stdin. This takes care of a bunch
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* of complex error handling. Thus, it returns a status instead of throwing an
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* error, except for fatal errors.
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* @param vec The vec to put the stdin into.
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* @param prompt The prompt to print, if desired.
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*/
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BcStatus
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bc_read_chars(BcVec* vec, const char* prompt);
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/**
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* Read a line from buf into vec.
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* @param vec The vector to read data into.
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* @param buf The buffer to read from.
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* @param buf_len The length of the buffer.
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*/
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bool
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bc_read_buf(BcVec* vec, char* buf, size_t* buf_len);
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#endif // BC_READ_H
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