Sha256: a437b409d0b3a52fff893b54841e3a55396c8706351c96017d28bc975553e2c2
Contents?: true
Size: 1.68 KB
Versions: 26
Compression:
Stored size: 1.68 KB
Contents
// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#ifndef UPB_MINI_DESCRIPTOR_INTERNAL_BASE92_H_
#define UPB_MINI_DESCRIPTOR_INTERNAL_BASE92_H_
#include <stdint.h>
#include "upb/base/internal/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_
Version data entries
26 entries across 26 versions & 1 rubygems