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.error { color:#AA0000; }</style></head><body style="word-wrap:break-word;line-break:after-white-space"><div class="bloop_markdown"><p></p></div><div class="bloop_original_html"><style>body{font-family:Helvetica,Arial;font-size:13px}</style><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">Hello!</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">I am wondering some details about HTTP/2 Huffman.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">There is a statement (<a href="http://hg.nginx.org/nginx/file/tip/src/http/v2/ngx_http_v2_huff_encode.c#l238">http://hg.nginx.org/nginx/file/tip/src/http/v2/ngx_http_v2_huff_encode.c#l238</a>)</div></div><div class="bloop_markdown"><p></p>
<div><p style="margin:0px;color:rgb(119,119,119);font-family:Helvetica,Arial;font-size:13px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">buf |= (ngx_uint_t) –1 >> pending;</p></div><p>I am confused about this statement, why should we set the low bits of but to 1 (sizeof(buf) - pending).</p><p>On the other hand, i am interested in the the generation about the huffman decode table (<a href="http://hg.nginx.org/nginx/file/tip/src/http/v2/ngx_http_v2_huff_decode.c#l25">http://hg.nginx.org/nginx/file/tip/src/http/v2/ngx_http_v2_huff_decode.c#l25</a>), </p><p>is this really a Huffman tree, which takes 4bits each time?</p><p><br></p><p><br></p><div></div></div></body></html>