numberparsing.h

#ifndef SIMDJSON_FALLBACK_NUMBERPARSING_H
#define SIMDJSON_FALLBACK_NUMBERPARSING_H
 
#ifdef JSON_TEST_NUMBERS // for unit testing
void found_invalid_number(const uint8_t *buf);
void found_integer(int64_t result, const uint8_t *buf);
void found_unsigned_integer(uint64_t result, const uint8_t *buf);
void found_float(double result, const uint8_t *buf);
#endif
 
namespace simdjson {
namespace SIMDJSON_IMPLEMENTATION {
namespace {
// credit: https://johnnylee-sde.github.io/Fast-numeric-string-to-int/
static simdjson_inline uint32_t parse_eight_digits_unrolled(const char *chars) {
  uint64_t val;
  memcpy(&val, chars, sizeof(uint64_t));
  val = (val & 0x0F0F0F0F0F0F0F0F) * 2561 >> 8;
  val = (val & 0x00FF00FF00FF00FF) * 6553601 >> 16;
  return uint32_t((val & 0x0000FFFF0000FFFF) * 42949672960001 >> 32);
}
static simdjson_inline uint32_t parse_eight_digits_unrolled(const uint8_t *chars) {
  return parse_eight_digits_unrolled(reinterpret_cast<const char *>(chars));
}
 
} // unnamed namespace
} // namespace SIMDJSON_IMPLEMENTATION
} // namespace simdjson
 
#define SIMDJSON_SWAR_NUMBER_PARSING 1
 
#include "simdjson/generic/numberparsing.h"
 
#endif // SIMDJSON_FALLBACK_NUMBERPARSING_H