src/utils.c

Sun, 21 May 2023 15:07:31 +0200

author
Mike Becker <universe@uap-core.de>
date
Sun, 21 May 2023 15:07:31 +0200
changeset 709
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parent 675
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child 736
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permissions
-rw-r--r--

simplify map class structure

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include "cx/utils.h"
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30
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31 #define CX_STREAM_BCOPY_BUF_SIZE 8192
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32 #define CX_STREAM_COPY_BUF_SIZE 1024
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33
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34 size_t cx_stream_bncopy(
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35 void *src,
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36 void *dest,
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37 cx_read_func rfnc,
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38 cx_write_func wfnc,
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39 char *buf,
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40 size_t bufsize,
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41 size_t n
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42 ) {
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43 if (n == 0) {
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44 return 0;
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45 }
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46
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47 char *lbuf;
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48 size_t ncp = 0;
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49
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50 if (buf) {
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51 if (bufsize == 0) return 0;
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52 lbuf = buf;
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53 } else {
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54 if (bufsize == 0) bufsize = CX_STREAM_BCOPY_BUF_SIZE;
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55 lbuf = malloc(bufsize);
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56 if (lbuf == NULL) {
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57 return 0;
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58 }
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59 }
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60
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61 size_t r;
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62 size_t rn = bufsize > n ? n : bufsize;
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63 while ((r = rfnc(lbuf, 1, rn, src)) != 0) {
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64 r = wfnc(lbuf, 1, r, dest);
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65 ncp += r;
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66 n -= r;
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67 rn = bufsize > n ? n : bufsize;
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68 if (r == 0 || n == 0) {
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69 break;
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70 }
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71 }
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72
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73 if (lbuf != buf) {
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74 free(lbuf);
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75 }
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76
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77 return ncp;
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78 }
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79
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80 size_t cx_stream_ncopy(
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81 void *src,
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82 void *dest,
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83 cx_read_func rfnc,
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84 cx_write_func wfnc,
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85 size_t n
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86 ) {
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87 char buf[CX_STREAM_COPY_BUF_SIZE];
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88 return cx_stream_bncopy(src, dest, rfnc, wfnc,
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89 buf, CX_STREAM_COPY_BUF_SIZE, n);
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90 }
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91
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92 #ifndef CX_SZMUL_BUILTIN
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93 #include "szmul.c"
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94 #endif

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