Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
2.9 KiB
81 lines
2.9 KiB
/* |
|
* Copyright (c) 2009-2022, Google LLC |
|
* All rights reserved. |
|
* |
|
* Redistribution and use in source and binary forms, with or without |
|
* modification, are permitted provided that the following conditions are met: |
|
* * Redistributions of source code must retain the above copyright |
|
* notice, this list of conditions and the following disclaimer. |
|
* * Redistributions in binary form must reproduce the above copyright |
|
* notice, this list of conditions and the following disclaimer in the |
|
* documentation and/or other materials provided with the distribution. |
|
* * Neither the name of Google LLC nor the |
|
* names of its contributors may be used to endorse or promote products |
|
* derived from this software without specific prior written permission. |
|
* |
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
|
* ARE DISCLAIMED. IN NO EVENT SHALL Google LLC BE LIABLE FOR ANY DIRECT, |
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
*/ |
|
|
|
#ifndef UPB_MINI_DESCRIPTOR_INTERNAL_BASE92_H_ |
|
#define UPB_MINI_DESCRIPTOR_INTERNAL_BASE92_H_ |
|
|
|
#include "upb/base/log2.h" |
|
|
|
// Must be last. |
|
#include "upb/port/def.inc" |
|
|
|
#ifdef __cplusplus |
|
extern "C" { |
|
#endif |
|
|
|
UPB_INLINE char _upb_ToBase92(int8_t ch) { |
|
extern const char _kUpb_ToBase92[]; |
|
UPB_ASSERT(0 <= ch && ch < 92); |
|
return _kUpb_ToBase92[ch]; |
|
} |
|
|
|
UPB_INLINE char _upb_FromBase92(uint8_t ch) { |
|
extern const int8_t _kUpb_FromBase92[]; |
|
if (' ' > ch || ch > '~') return -1; |
|
return _kUpb_FromBase92[ch - ' ']; |
|
} |
|
|
|
UPB_INLINE const char* _upb_Base92_DecodeVarint(const char* ptr, |
|
const char* end, char first_ch, |
|
uint8_t min, uint8_t max, |
|
uint32_t* out_val) { |
|
uint32_t val = 0; |
|
uint32_t shift = 0; |
|
const int bits_per_char = |
|
upb_Log2Ceiling(_upb_FromBase92(max) - _upb_FromBase92(min)); |
|
char ch = first_ch; |
|
while (1) { |
|
uint32_t bits = _upb_FromBase92(ch) - _upb_FromBase92(min); |
|
val |= bits << shift; |
|
if (ptr == end || *ptr < min || max < *ptr) { |
|
*out_val = val; |
|
UPB_ASSUME(ptr != NULL); |
|
return ptr; |
|
} |
|
ch = *ptr++; |
|
shift += bits_per_char; |
|
if (shift >= 32) return NULL; |
|
} |
|
} |
|
|
|
#ifdef __cplusplus |
|
} /* extern "C" */ |
|
#endif |
|
|
|
#include "upb/port/undef.inc" |
|
|
|
#endif // UPB_MINI_DESCRIPTOR_INTERNAL_BASE92_H_
|
|
|