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https://github.com/freebsd/freebsd-src
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d101cdd6ed
This update fixes a few issues in history editing and the processing of the "quit" function. The "quit" function will no longer cause bc to exit when encountered in a script file (before any command from the script has been executed). New functions is_number(), is_string return 1 if the passed argument is a number resp. a string. The asciify() function has been extended to support the conversion of an array of numbers into a string. Merge commit '1a63323d17fedb05b6962853e821c9d7c6b9853e'
226 lines
6.3 KiB
C
226 lines
6.3 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) 2018-2023 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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* Definitions for implementing buffered I/O on my own terms.
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*
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*/
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#ifndef BC_FILE_H
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#define BC_FILE_H
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#include <stdarg.h>
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#include <history.h>
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#include <vector.h>
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#define BC_FILE_ULL_LENGTH (21)
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#if BC_ENABLE_LINE_LIB
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#include <stdio.h>
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/// The file struct.
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typedef struct BcFile
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{
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// The file. This is here simply to make the line lib code as compatible
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// with the existing code as possible.
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FILE* f;
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} BcFile;
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#else // BC_ENABLE_LINE_LIB
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/// The file struct.
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typedef struct BcFile
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{
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// The actual file descriptor.
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int fd;
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// The buffer for the file.
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char* buf;
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// The length (number of actual chars) in the buffer.
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size_t len;
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// The capacity (max number of chars) of the buffer.
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size_t cap;
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} BcFile;
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#endif // BC_ENABLE_LINE_LIB
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#if BC_ENABLE_HISTORY && !BC_ENABLE_LINE_LIB
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/// Types of flushing. These are important because of history and printing
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/// strings without newlines, something that users could use as their own
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/// prompts.
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typedef enum BcFlushType
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{
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/// Do not clear the stored partial line, but don't add to it.
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BC_FLUSH_NO_EXTRAS_NO_CLEAR,
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/// Do not clear the stored partial line and add to it.
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BC_FLUSH_SAVE_EXTRAS_NO_CLEAR,
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/// Clear the stored partial line and do not save the new stuff either.
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BC_FLUSH_NO_EXTRAS_CLEAR,
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/// Clear the stored partial line, but save the new stuff.
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BC_FLUSH_SAVE_EXTRAS_CLEAR,
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} BcFlushType;
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// These are here to satisfy a clang warning about recursive macros.
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#define bc_file_putchar(f, t, c) bc_file_putchar_impl(f, t, c)
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#define bc_file_flushErr(f, t) bc_file_flushErr_impl(f, t)
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#define bc_file_flush(f, t) bc_file_flush_impl(f, t)
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#define bc_file_write(f, t, b, n) bc_file_write_impl(f, t, b, n)
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#define bc_file_puts(f, t, s) bc_file_puts_impl(f, t, s)
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#else // BC_ENABLE_HISTORY && !BC_ENABLE_LINE_LIB
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// These make sure that the BcFlushType parameter disappears if history is not
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// used, editline is used, or readline is used.
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#define bc_file_putchar(f, t, c) bc_file_putchar_impl(f, c)
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#define bc_file_flushErr(f, t) bc_file_flushErr_impl(f)
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#define bc_file_flush(f, t) bc_file_flush_impl(f)
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#define bc_file_write(f, t, b, n) bc_file_write_impl(f, b, n)
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#define bc_file_puts(f, t, s) bc_file_puts_impl(f, s)
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#endif // BC_ENABLE_HISTORY && !BC_ENABLE_LINE_LIB
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#if BC_ENABLE_LINE_LIB
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/**
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* Initialize a file.
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* @param f The file to initialize.
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* @param file The stdio file.
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*/
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void
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bc_file_init(BcFile* f, FILE* file);
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#else // BC_ENABLE_LINE_LIB
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/**
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* Initialize a file.
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* @param f The file to initialize.
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* @param fd The file descriptor.
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* @param buf The buffer for the file.
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* @param cap The capacity of the buffer.
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*/
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void
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bc_file_init(BcFile* f, int fd, char* buf, size_t cap);
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#endif // BC_ENABLE_LINE_LIB
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/**
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* Frees a file, including flushing it.
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* @param f The file to free.
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*/
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void
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bc_file_free(BcFile* f);
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/**
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* Print a char into the file.
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* @param f The file to print to.
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* @param type The flush type.
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* @param c The character to write.
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*/
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void
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bc_file_putchar(BcFile* restrict f, BcFlushType type, uchar c);
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/**
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* Flush and return an error if it failed. This is meant to be used when needing
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* to flush in error situations when an error is already in flight. It would be
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* a very bad deal to throw another error.
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* @param f The file to flush.
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* @param type The flush type.
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* @return A status indicating if an error occurred.
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*/
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BcStatus
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bc_file_flushErr(BcFile* restrict f, BcFlushType type);
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/**
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* Flush and throw an error on failure.
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* @param f The file to flush.
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* @param type The flush type.
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*/
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void
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bc_file_flush(BcFile* restrict f, BcFlushType type);
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/**
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* Write the contents of buf to the file.
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* @param f The file to flush.
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* @param type The flush type.
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* @param buf The buffer whose contents will be written to the file.
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* @param n The length of buf.
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*/
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void
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bc_file_write(BcFile* restrict f, BcFlushType type, const char* buf, size_t n);
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/**
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* Write to the file like fprintf would. This is very rudimentary.
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* @param f The file to flush.
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* @param fmt The format string.
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*/
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void
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bc_file_printf(BcFile* restrict f, const char* fmt, ...);
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/**
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* Write to the file like vfprintf would. This is very rudimentary.
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* @param f The file to flush.
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* @param fmt The format string.
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*/
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void
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bc_file_vprintf(BcFile* restrict f, const char* fmt, va_list args);
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/**
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* Write str to the file.
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* @param f The file to flush.
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* @param type The flush type.
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* @param str The string to write to the file.
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*/
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void
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bc_file_puts(BcFile* restrict f, BcFlushType type, const char* str);
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#if BC_ENABLE_HISTORY && !BC_ENABLE_LINE_LIB
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// Some constant flush types for ease of use.
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extern const BcFlushType bc_flush_none;
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extern const BcFlushType bc_flush_err;
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extern const BcFlushType bc_flush_save;
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#endif // BC_ENABLE_HISTORY && !BC_ENABLE_LINE_LIB
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#endif // BC_FILE_H
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