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| <a href="useful_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright 2015, Google Inc.</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * All rights reserved.</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * modification, are permitted provided that the following conditions are</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * met:</span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * * Redistributions of source code must retain the above copyright</span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * notice, this list of conditions and the following disclaimer.</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * * Redistributions in binary form must reproduce the above</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * copyright notice, this list of conditions and the following disclaimer</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * in the documentation and/or other materials provided with the</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * distribution.</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * * Neither the name of Google Inc. nor the names of its</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * contributors may be used to endorse or promote products derived from</span></div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * this software without specific prior written permission.</span></div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span></div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span></div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR</span></div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT</span></div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span></div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</span></div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,</span></div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY</span></div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span></div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span></div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#ifndef GRPC_SUPPORT_USEFUL_H</span></div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor"></span><span class="preprocessor">#define GRPC_SUPPORT_USEFUL_H</span></div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">/* useful macros that don't belong anywhere else */</span></div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div> |
| <div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="useful_8h.html#a298322c952526928cf8dbc7aaba7b84d"> 39</a></span> <span class="preprocessor">#define GPR_MIN(a, b) ((a) < (b) ? (a) : (b))</span></div> |
| <div class="line"><a name="l00040"></a><span class="lineno"><a class="line" href="useful_8h.html#af50c518bb1183da84adb7d8a86cd568a"> 40</a></span> <span class="preprocessor"></span><span class="preprocessor">#define GPR_MAX(a, b) ((a) > (b) ? (a) : (b))</span></div> |
| <div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="useful_8h.html#ac974b8c13ee716193e0ee30d9513672c"> 41</a></span> <span class="preprocessor"></span><span class="preprocessor">#define GPR_CLAMP(a, min, max) ((a) < (min) ? (min) : (a) > (max) ? (max) : (a))</span></div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor"></span><span class="comment">/* rotl, rotr assume x is unsigned */</span></div> |
| <div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="useful_8h.html#a6f7a8aba8e044f6b20fc8a7560f28f85"> 43</a></span> <span class="preprocessor">#define GPR_ROTL(x, n) (((x) << (n)) | ((x) >> (sizeof(x) * 8 - (n))))</span></div> |
| <div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="useful_8h.html#a5ff4b278972e799dc134963a0249f316"> 44</a></span> <span class="preprocessor"></span><span class="preprocessor">#define GPR_ROTR(x, n) (((x) >> (n)) | ((x) << (sizeof(x) * 8 - (n))))</span></div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="useful_8h.html#a0e411d4f81a169c97c319d4e84df5747"> 46</a></span> <span class="preprocessor">#define GPR_ARRAY_SIZE(array) (sizeof(array) / sizeof(*(array)))</span></div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="useful_8h.html#a9f884f8218a97ed9739e2dac467f0719"> 48</a></span> <span class="preprocessor">#define GPR_SWAP(type, a, b) \</span></div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor"> do { \</span></div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor"> type x = a; \</span></div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor"> a = b; \</span></div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor"> b = x; \</span></div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor"> } while (0)</span></div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="useful_8h.html#a28de4ed955bfc2bff309061b7820a37a"> 56</a></span> <span class="preprocessor">#define GPR_BITSET(i, n) ((*(i)) |= (1u << (n)))</span></div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="useful_8h.html#af797bf1803f9809b3ccceaa619078c89"> 59</a></span> <span class="preprocessor">#define GPR_BITCLEAR(i, n) ((*(i)) &= ~(1u << (n)))</span></div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="useful_8h.html#a7c54bb2fffdaae24ba38ca5e5c53ab41"> 62</a></span> <span class="preprocessor">#define GPR_BITGET(i, n) (((i) & (1u << (n))) != 0)</span></div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00064"></a><span class="lineno"><a class="line" href="useful_8h.html#a601e1be692fe7922b52991a5d410b945"> 64</a></span> <span class="preprocessor">#define GPR_INTERNAL_HEXDIGIT_BITCOUNT(x) \</span></div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor"> ((x) - (((x) >> 1) & 0x77777777) - (((x) >> 2) & 0x33333333) - \</span></div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor"> (((x) >> 3) & 0x11111111))</span></div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00069"></a><span class="lineno"><a class="line" href="useful_8h.html#a8f51444fe97eb3f83184b98035e3357f"> 69</a></span> <span class="preprocessor">#define GPR_BITCOUNT(i) \</span></div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor"> (((GPR_INTERNAL_HEXDIGIT_BITCOUNT(i) + \</span></div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor"> (GPR_INTERNAL_HEXDIGIT_BITCOUNT(i) >> 4)) & \</span></div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor"> 0x0f0f0f0f) % \</span></div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor"> 255)</span></div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor">#endif </span><span class="comment">/* GRPC_SUPPORT_USEFUL_H */</span><span class="preprocessor"></span></div> |
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