2 * *****************************************************************************
4 * SPDX-License-Identifier: BSD-2-Clause
6 * Copyright (c) 2018-2021 Gavin D. Howard and contributors.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * * Redistributions of source code must retain the above copyright notice, this
12 * list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above copyright notice,
15 * this list of conditions and the following disclaimer in the documentation
16 * and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
30 * *****************************************************************************
32 * Definitions for implementing buffered I/O on my own terms.
43 #define BC_FILE_ULL_LENGTH (21)
46 typedef struct BcFile {
48 // The actual file descriptor.
51 // The buffer for the file.
54 // The length (number of actual chars) in the buffer.
57 // The capacity (max number of chars) of the buffer.
64 /// Types of flushing. These are important because of history and printing
65 /// strings without newlines, something that users could use as their own
67 typedef enum BcFlushType {
69 /// Do not clear the stored partial line, but don't add to it.
70 BC_FLUSH_NO_EXTRAS_NO_CLEAR,
72 /// Do not clear the stored partial line and add to it.
73 BC_FLUSH_SAVE_EXTRAS_NO_CLEAR,
75 /// Clear the stored partial line and do not save the new stuff either.
76 BC_FLUSH_NO_EXTRAS_CLEAR,
78 /// Clear the stored partial line, but save the new stuff.
79 BC_FLUSH_SAVE_EXTRAS_CLEAR,
83 #else // BC_ENABLE_HISTORY
85 // These make sure that the BcFlushType parameter disappears if history is not
88 #define bc_file_putchar(f, t, c) bc_file_putchar(f, c)
89 #define bc_file_flushErr(f, t) bc_file_flushErr(f)
90 #define bc_file_flush(f, t) bc_file_flush(f)
91 #define bc_file_write(f, t, b, n) bc_file_write(f, b, n)
92 #define bc_file_puts(f, t, s) bc_file_puts(f, s)
94 #endif // BC_ENABLE_HISTORY
98 * @param f The file to initialize.
99 * @param fd The file descriptor.
100 * @param buf The buffer for the file.
101 * @param cap The capacity of the buffer.
103 void bc_file_init(BcFile *f, int fd, char *buf, size_t cap);
106 * Frees a file, including flushing it.
107 * @param f The file to free.
109 void bc_file_free(BcFile *f);
112 * Print a char into the file.
113 * @param f The file to print to.
114 * @param type The flush type.
115 * @param c The character to write.
117 void bc_file_putchar(BcFile *restrict f, BcFlushType type, uchar c);
120 * Flush and return an error if it failed. This is meant to be used when needing
121 * to flush in error situations when an error is already in flight. It would be
122 * a very bad deal to throw another error.
123 * @param f The file to flush.
124 * @param type The flush type.
125 * @return A status indicating if an error occurred.
127 BcStatus bc_file_flushErr(BcFile *restrict f, BcFlushType type);
130 * Flush and throw an error on failure.
131 * @param f The file to flush.
132 * @param type The flush type.
134 void bc_file_flush(BcFile *restrict f, BcFlushType type);
137 * Write the contents of buf to the file.
138 * @param f The file to flush.
139 * @param type The flush type.
140 * @param buf The buffer whose contents will be written to the file.
141 * @param n The length of buf.
143 void bc_file_write(BcFile *restrict f, BcFlushType type,
144 const char *buf, size_t n);
147 * Write to the file like fprintf would. This is very rudimentary.
148 * @param f The file to flush.
149 * @param fmt The format string.
151 void bc_file_printf(BcFile *restrict f, const char *fmt, ...);
154 * Write to the file like vfprintf would. This is very rudimentary.
155 * @param f The file to flush.
156 * @param fmt The format string.
158 void bc_file_vprintf(BcFile *restrict f, const char *fmt, va_list args);
161 * Write str to the file.
162 * @param f The file to flush.
163 * @param type The flush type.
164 * @param str The string to write to the file.
166 void bc_file_puts(BcFile *restrict f, BcFlushType type, const char *str);
168 #if BC_ENABLE_HISTORY
170 // Some constant flush types for ease of use.
171 extern const BcFlushType bc_flush_none;
172 extern const BcFlushType bc_flush_err;
173 extern const BcFlushType bc_flush_save;
175 #endif // BC_ENABLE_HISTORY