comparison: ucx/cx/streams.h
ucx/cx/streams.h
- changeset 440
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| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 /** | |
| 30 * @file streams.h | |
| 31 * | |
| 32 * @brief Utility functions for data streams. | |
| 33 * | |
| 34 * @author Mike Becker | |
| 35 * @author Olaf Wintermann | |
| 36 * @copyright 2-Clause BSD License | |
| 37 */ | |
| 38 | |
| 39 #ifndef UCX_STREAMS_H | |
| 40 #define UCX_STREAMS_H | |
| 41 | |
| 42 #include "common.h" | |
| 43 | |
| 44 #ifdef __cplusplus | |
| 45 extern "C" { | |
| 46 #endif | |
| 47 | |
| 48 /** | |
| 49 * Reads data from a stream and writes it to another stream. | |
| 50 * | |
| 51 * @param src the source stream | |
| 52 * @param dest the destination stream | |
| 53 * @param rfnc the read function | |
| 54 * @param wfnc the write function | |
| 55 * @param buf a pointer to the copy buffer or @c NULL if a buffer | |
| 56 * shall be implicitly created on the heap | |
| 57 * @param bufsize the size of the copy buffer - if @p buf is @c NULL you can | |
| 58 * set this to zero to let the implementation decide | |
| 59 * @param n the maximum number of bytes that shall be copied. | |
| 60 * If this is larger than @p bufsize, the content is copied over multiple | |
| 61 * iterations. | |
| 62 * @return the total number of bytes copied | |
| 63 */ | |
| 64 cx_attr_nonnull_arg(1, 2, 3, 4) | |
| 65 cx_attr_access_r(1) | |
| 66 cx_attr_access_w(2) | |
| 67 cx_attr_access_w(5) | |
| 68 size_t cx_stream_bncopy( | |
| 69 void *src, | |
| 70 void *dest, | |
| 71 cx_read_func rfnc, | |
| 72 cx_write_func wfnc, | |
| 73 char *buf, | |
| 74 size_t bufsize, | |
| 75 size_t n | |
| 76 ); | |
| 77 | |
| 78 /** | |
| 79 * Reads data from a stream and writes it to another stream. | |
| 80 * | |
| 81 * @param src (@c void*) the source stream | |
| 82 * @param dest (@c void*) the destination stream | |
| 83 * @param rfnc (@c cx_read_func) the read function | |
| 84 * @param wfnc (@c cx_write_func) the write function | |
| 85 * @param buf (@c char*) a pointer to the copy buffer or @c NULL if a buffer | |
| 86 * shall be implicitly created on the heap | |
| 87 * @param bufsize (@c size_t) the size of the copy buffer - if @p buf is | |
| 88 * @c NULL you can set this to zero to let the implementation decide | |
| 89 * @return total number of bytes copied | |
| 90 */ | |
| 91 #define cx_stream_bcopy(src, dest, rfnc, wfnc, buf, bufsize) \ | |
| 92 cx_stream_bncopy(src, dest, rfnc, wfnc, buf, bufsize, SIZE_MAX) | |
| 93 | |
| 94 /** | |
| 95 * Reads data from a stream and writes it to another stream. | |
| 96 * | |
| 97 * The data is temporarily stored in a stack allocated buffer. | |
| 98 * | |
| 99 * @param src the source stream | |
| 100 * @param dest the destination stream | |
| 101 * @param rfnc the read function | |
| 102 * @param wfnc the write function | |
| 103 * @param n the maximum number of bytes that shall be copied. | |
| 104 * @return total number of bytes copied | |
| 105 */ | |
| 106 cx_attr_nonnull | |
| 107 cx_attr_access_r(1) | |
| 108 cx_attr_access_w(2) | |
| 109 size_t cx_stream_ncopy( | |
| 110 void *src, | |
| 111 void *dest, | |
| 112 cx_read_func rfnc, | |
| 113 cx_write_func wfnc, | |
| 114 size_t n | |
| 115 ); | |
| 116 | |
| 117 /** | |
| 118 * Reads data from a stream and writes it to another stream. | |
| 119 * | |
| 120 * The data is temporarily stored in a stack allocated buffer. | |
| 121 * | |
| 122 * @param src (@c void*) the source stream | |
| 123 * @param dest (@c void*) the destination stream | |
| 124 * @param rfnc (@c cx_read_func) the read function | |
| 125 * @param wfnc (@c cx_write_func) the write function | |
| 126 * @return total number of bytes copied | |
| 127 */ | |
| 128 #define cx_stream_copy(src, dest, rfnc, wfnc) \ | |
| 129 cx_stream_ncopy(src, dest, rfnc, wfnc, SIZE_MAX) | |
| 130 | |
| 131 #ifdef __cplusplus | |
| 132 } | |
| 133 #endif | |
| 134 | |
| 135 #endif // UCX_STREAMS_H |
