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Public Member Functions | Protected Member Functions | Protected Attributes
QRSequenceGenerator Class Reference

`#include <qrsequence.h>`

List of all members.

## Public Member Functions
| QRSequenceGenerator (int N)
int | GetVal ()

## Protected Member Functions
int | GetBinaryReversedInteger (int in_val) const

## Protected Attributes
int | N_
int | next_num_
int | num_bits_

## Detailed Description

Definition at line 32 of file qrsequence.h.

## Constructor & Destructor Documentation

QRSequenceGenerator::QRSequenceGenerator | ( | int | N | ) |
| inline explicit

Definition at line 35 of file qrsequence.h.

: N_(N), next_num_(0) {
num_bits_ = static_cast<int>(ceil(log(static_cast<double>(N)) / log(2.0)));
}

## Member Function Documentation

int QRSequenceGenerator::GetBinaryReversedInteger | ( | int | in_val | ) | const
| inline protected

Definition at line 58 of file qrsequence.h.

{
int bit_pos = num_bits_;
int out_val = 0;
while(bit_pos--) {
// Set the value of the last bit.
out_val |= (in_val & 0x1);
if (bit_pos > 0) {
// Left-shift output value to prepare for storing the next bit.
out_val <<= 1;
}
// Right-shift input value to prepare for retrieving the next bit.
in_val >>= 1;
}
return out_val;
}

int QRSequenceGenerator::GetVal | ( |  | ) |
| inline

Definition at line 41 of file qrsequence.h.

{
const int kInvalidVal = -1;
const int kMaxNaturalNumberValue = 1 << num_bits_;
if (next_num_ >= kMaxNaturalNumberValue)
return kInvalidVal;
int n = next_num_;
while (next_num_ < kMaxNaturalNumberValue) {
n = GetBinaryReversedInteger(next_num_++);
if (n < N_) break;
}
return (next_num_ > kMaxNaturalNumberValue) ? kInvalidVal : n;
}

## Member Data Documentation

int QRSequenceGenerator::N_
| protected

Definition at line 73 of file qrsequence.h.

int QRSequenceGenerator::next_num_
| protected

Definition at line 75 of file qrsequence.h.

int QRSequenceGenerator::num_bits_
| protected

Definition at line 77 of file qrsequence.h.

The documentation for this class was generated from the following file:

- /mnt/data/src/tesseract-ocr/ccutil/qrsequence.h