Sun, 02 Jul 2023 12:06:45 +0200
fix split test script
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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 | /** |
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30 | * \file utils.h |
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31 | * |
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32 | * \brief General purpose utility functions. |
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33 | * |
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34 | * \author Mike Becker |
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35 | * \author Olaf Wintermann |
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36 | * \version 3.0 |
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37 | * \copyright 2-Clause BSD License |
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38 | */ |
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39 | |
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40 | #ifndef UCX_UTILS_H |
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41 | #define UCX_UTILS_H |
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42 | |
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43 | #include "common.h" |
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44 | |
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45 | #ifdef __cplusplus |
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46 | extern "C" { |
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47 | #endif |
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48 | |
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49 | /** |
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50 | * Convenience macro for a for loop that counts from zero to n-1. |
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51 | */ |
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52 | #define cx_for_n(varname, n) for (size_t varname = 0 ; (varname) < (n) ; (varname)++) |
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53 | |
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54 | /** |
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55 | * Convenience macro for swapping two pointers. |
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56 | */ |
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57 | #ifdef __cplusplus |
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58 | #define cx_swap_ptr(left, right) do {auto cx_tmp_swap_var = left; left = right; right = cx_tmp_swap_var;} while(0) |
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59 | #else |
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60 | #define cx_swap_ptr(left, right) do {void *cx_tmp_swap_var = left; left = right; right = cx_tmp_swap_var;} while(0) |
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61 | #endif |
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62 | |
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63 | // cx_szmul() definition |
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64 | |
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65 | #if (__GNUC__ >= 5 || defined(__clang__)) && !defined(CX_NO_SZMUL_BUILTIN) |
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66 | #define CX_SZMUL_BUILTIN |
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67 | |
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68 | /** |
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69 | * Alias for \c __builtin_mul_overflow. |
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70 | * |
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71 | * Performs a multiplication of size_t values and checks for overflow. |
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72 | * |
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73 | * @param a first operand |
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74 | * @param b second operand |
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75 | * @param result a pointer to a size_t, where the result should |
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76 | * be stored |
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77 | * @return zero, if no overflow occurred and the result is correct, non-zero |
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78 | * otherwise |
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79 | */ |
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80 | #define cx_szmul(a, b, result) __builtin_mul_overflow(a, b, result) |
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81 | |
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82 | #else // no GNUC or clang bultin |
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83 | |
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84 | /** |
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85 | * Performs a multiplication of size_t values and checks for overflow. |
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86 | * |
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87 | * @param a first operand |
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88 | * @param b second operand |
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89 | * @param result a pointer to a size_t, where the result should |
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90 | * be stored |
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91 | * @return zero, if no overflow occurred and the result is correct, non-zero |
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92 | * otherwise |
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93 | */ |
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94 | #define cx_szmul(a, b, result) cx_szmul_impl(a, b, result) |
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95 | |
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96 | /** |
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97 | * Performs a multiplication of size_t values and checks for overflow. |
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98 | * |
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99 | * This is a custom implementation in case there is no compiler builtin |
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100 | * available. |
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101 | * |
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102 | * @param a first operand |
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103 | * @param b second operand |
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104 | * @param result a pointer to a size_t where the result should be stored |
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105 | * @return zero, if no overflow occurred and the result is correct, non-zero |
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106 | * otherwise |
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107 | */ |
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108 | int cx_szmul_impl(size_t a, size_t b, size_t *result); |
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109 | |
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110 | #endif // cx_szmul |
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111 | |
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112 | |
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113 | /** |
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114 | * Reads data from a stream and writes it to another stream. |
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115 | * |
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116 | * @param src the source stream |
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117 | * @param dest the destination stream |
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118 | * @param rfnc the read function |
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119 | * @param wfnc the write function |
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120 | * @param buf a pointer to the copy buffer or \c NULL if a buffer |
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121 | * shall be implicitly created on the heap |
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122 | * @param bufsize the size of the copy buffer - if \p buf is \c NULL you can |
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123 | * set this to zero to let the implementation decide |
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124 | * @param n the maximum number of bytes that shall be copied. |
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125 | * If this is larger than \p bufsize, the content is copied over multiple |
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126 | * iterations. |
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127 | * @return the total number of bytes copied |
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128 | */ |
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129 | __attribute__((__nonnull__(1, 2, 3, 4))) |
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130 | size_t cx_stream_bncopy( |
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131 | void *src, |
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132 | void *dest, |
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133 | cx_read_func rfnc, |
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134 | cx_write_func wfnc, |
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135 | char *buf, |
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136 | size_t bufsize, |
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137 | size_t n |
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138 | ); |
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139 | |
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140 | /** |
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141 | * Reads data from a stream and writes it to another stream. |
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142 | * |
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143 | * @param src the source stream |
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144 | * @param dest the destination stream |
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145 | * @param rfnc the read function |
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146 | * @param wfnc the write function |
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147 | * @param buf a pointer to the copy buffer or \c NULL if a buffer |
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148 | * shall be implicitly created on the heap |
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149 | * @param bufsize the size of the copy buffer - if \p buf is \c NULL you can |
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150 | * set this to zero to let the implementation decide |
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151 | * @return total number of bytes copied |
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152 | */ |
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153 | #define cx_stream_bcopy(src, dest, rfnc, wfnc, buf, bufsize) \ |
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154 | cx_stream_bncopy(src, dest, rfnc, wfnc, buf, bufsize, SIZE_MAX) |
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155 | |
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156 | /** |
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157 | * Reads data from a stream and writes it to another stream. |
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158 | * |
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159 | * The data is temporarily stored in a stack allocated buffer. |
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160 | * |
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161 | * @param src the source stream |
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162 | * @param dest the destination stream |
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163 | * @param rfnc the read function |
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164 | * @param wfnc the write function |
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165 | * @param n the maximum number of bytes that shall be copied. |
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166 | * @return total number of bytes copied |
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167 | */ |
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168 | __attribute__((__nonnull__)) |
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169 | size_t cx_stream_ncopy( |
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170 | void *src, |
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171 | void *dest, |
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172 | cx_read_func rfnc, |
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173 | cx_write_func wfnc, |
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174 | size_t n |
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175 | ); |
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176 | |
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177 | /** |
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178 | * Reads data from a stream and writes it to another stream. |
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179 | * |
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180 | * The data is temporarily stored in a stack allocated buffer. |
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181 | * |
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182 | * @param src the source stream |
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183 | * @param dest the destination stream |
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184 | * @param rfnc the read function |
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185 | * @param wfnc the write function |
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186 | * @param n the maximum number of bytes that shall be copied. |
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187 | * @return total number of bytes copied |
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188 | */ |
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189 | #define cx_stream_copy(src, dest, rfnc, wfnc) \ |
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190 | cx_stream_ncopy(src, dest, rfnc, wfnc, SIZE_MAX) |
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191 | |
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192 | #ifdef __cplusplus |
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193 | } |
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194 | #endif |
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195 | |
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196 | #endif // UCX_UTILS_H |