streams.c
| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 | #include "cx/streams.h" | ||
| 30 | #include "cx/allocator.h" | ||
| 31 | |||
| 32 | #ifndef CX_STREAM_BCOPY_BUF_SIZE | ||
| 33 | #define CX_STREAM_BCOPY_BUF_SIZE 8192 | ||
| 34 | #endif | ||
| 35 | |||
| 36 | #ifndef CX_STREAM_COPY_BUF_SIZE | ||
| 37 | #define CX_STREAM_COPY_BUF_SIZE 1024 | ||
| 38 | #endif | ||
| 39 | |||
| 40 | 5 | size_t cx_stream_bncopy( | |
| 41 | void *src, | ||
| 42 | void *dest, | ||
| 43 | cx_read_func rfnc, | ||
| 44 | cx_write_func wfnc, | ||
| 45 | char *buf, | ||
| 46 | size_t bufsize, | ||
| 47 | size_t n | ||
| 48 | ) { | ||
| 49 |
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5 | if (n == 0) { |
| 50 | 1 | return 0; | |
| 51 | } | ||
| 52 | |||
| 53 | char *lbuf; | ||
| 54 | 4 | size_t ncp = 0; | |
| 55 | |||
| 56 |
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4 | if (buf) { |
| 57 |
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3 | if (bufsize == 0) return 0; |
| 58 | 3 | lbuf = buf; | |
| 59 | } else { | ||
| 60 |
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1 | if (bufsize == 0) bufsize = CX_STREAM_BCOPY_BUF_SIZE; |
| 61 | 1 | lbuf = cxMallocDefault(bufsize); | |
| 62 |
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1 | if (lbuf == NULL) return 0; |
| 63 | } | ||
| 64 | |||
| 65 | size_t r; | ||
| 66 | 4 | size_t rn = bufsize > n ? n : bufsize; | |
| 67 |
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10 | while ((r = rfnc(lbuf, 1, rn, src)) != 0) { |
| 68 | 8 | r = wfnc(lbuf, 1, r, dest); | |
| 69 | 8 | ncp += r; | |
| 70 | 8 | n -= r; | |
| 71 | 8 | rn = bufsize > n ? n : bufsize; | |
| 72 |
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8 | if (r == 0 || n == 0) { |
| 73 | break; | ||
| 74 | } | ||
| 75 | } | ||
| 76 | |||
| 77 |
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4 | if (lbuf != buf) { |
| 78 | 1 | cxFreeDefault(lbuf); | |
| 79 | } | ||
| 80 | |||
| 81 | 4 | return ncp; | |
| 82 | } | ||
| 83 | |||
| 84 | 2 | size_t cx_stream_ncopy( | |
| 85 | void *src, | ||
| 86 | void *dest, | ||
| 87 | cx_read_func rfnc, | ||
| 88 | cx_write_func wfnc, | ||
| 89 | size_t n | ||
| 90 | ) { | ||
| 91 | char buf[CX_STREAM_COPY_BUF_SIZE]; | ||
| 92 | 2 | return cx_stream_bncopy(src, dest, rfnc, wfnc, | |
| 93 | buf, CX_STREAM_COPY_BUF_SIZE, n); | ||
| 94 | } | ||
| 95 |