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* Copyright 2015, Google Inc.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "src/core/transport/chttp2/varint.h"
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int grpc_chttp2_hpack_varint_length(gpr_uint32 tail_value) {
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if (tail_value < (1 << 7)) {
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} else if (tail_value < (1 << 14)) {
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} else if (tail_value < (1 << 21)) {
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} else if (tail_value < (1 << 28)) {
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void grpc_chttp2_hpack_write_varint_tail(gpr_uint32 tail_value,
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gpr_uint8* target, int tail_length) {
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switch (tail_length) {
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target[4] = (gpr_uint8)((tail_value >> 28) | 0x80);
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target[3] = (gpr_uint8)((tail_value >> 21) | 0x80);
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target[2] = (gpr_uint8)((tail_value >> 14) | 0x80);
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target[1] = (gpr_uint8)((tail_value >> 7) | 0x80);
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target[0] = (gpr_uint8)((tail_value) | 0x80);
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target[tail_length - 1] &= 0x7f;