porting more supporting qrcode files

src/qrcode/decoder/FormatInformation.java

@@ -1,157 +0,0 @@
-/*
- * Copyright 2007 ZXing authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.zxing.qrcode.decoder;
-
-/**
- * <p>Encapsulates a QR Code's format information, including the data mask used and
- * error correction level.</p>
- *
- * @author Sean Owen
- * @see DataMask
- * @see ErrorCorrectionLevel
- */
-final class FormatInformation {
-
-  private static final int FORMAT_INFO_MASK_QR = 0x5412;
-
-  /**
-   * See ISO 18004:2006, Annex C, Table C.1
-   */
-  private static final int[][] FORMAT_INFO_DECODE_LOOKUP = {
-      {0x5412, 0x00},
-      {0x5125, 0x01},
-      {0x5E7C, 0x02},
-      {0x5B4B, 0x03},
-      {0x45F9, 0x04},
-      {0x40CE, 0x05},
-      {0x4F97, 0x06},
-      {0x4AA0, 0x07},
-      {0x77C4, 0x08},
-      {0x72F3, 0x09},
-      {0x7DAA, 0x0A},
-      {0x789D, 0x0B},
-      {0x662F, 0x0C},
-      {0x6318, 0x0D},
-      {0x6C41, 0x0E},
-      {0x6976, 0x0F},
-      {0x1689, 0x10},
-      {0x13BE, 0x11},
-      {0x1CE7, 0x12},
-      {0x19D0, 0x13},
-      {0x0762, 0x14},
-      {0x0255, 0x15},
-      {0x0D0C, 0x16},
-      {0x083B, 0x17},
-      {0x355F, 0x18},
-      {0x3068, 0x19},
-      {0x3F31, 0x1A},
-      {0x3A06, 0x1B},
-      {0x24B4, 0x1C},
-      {0x2183, 0x1D},
-      {0x2EDA, 0x1E},
-      {0x2BED, 0x1F},
-  };
-
-  private final ErrorCorrectionLevel errorCorrectionLevel;
-  private final byte dataMask;
-
-  private FormatInformation(int formatInfo) {
-    // Bits 3,4
-    errorCorrectionLevel = ErrorCorrectionLevel.forBits((formatInfo >> 3) & 0x03);
-    // Bottom 3 bits
-    dataMask = (byte) (formatInfo & 0x07);
-  }
-
-  static int numBitsDiffering(int a, int b) {
-    return Integer.bitCount(a ^ b);
-  }
-
-  /**
-   * @param maskedFormatInfo1 format info indicator, with mask still applied
-   * @param maskedFormatInfo2 second copy of same info; both are checked at the same time
-   *  to establish best match
-   * @return information about the format it specifies, or {@code null}
-   *  if doesn't seem to match any known pattern
-   */
-  static FormatInformation decodeFormatInformation(int maskedFormatInfo1, int maskedFormatInfo2) {
-    FormatInformation formatInfo = doDecodeFormatInformation(maskedFormatInfo1, maskedFormatInfo2);
-    if (formatInfo != null) {
-      return formatInfo;
-    }
-    // Should return null, but, some QR codes apparently
-    // do not mask this info. Try again by actually masking the pattern
-    // first
-    return doDecodeFormatInformation(maskedFormatInfo1 ^ FORMAT_INFO_MASK_QR,
-                                     maskedFormatInfo2 ^ FORMAT_INFO_MASK_QR);
-  }
-
-  private static FormatInformation doDecodeFormatInformation(int maskedFormatInfo1, int maskedFormatInfo2) {
-    // Find the int in FORMAT_INFO_DECODE_LOOKUP with fewest bits differing
-    int bestDifference = Integer.MAX_VALUE;
-    int bestFormatInfo = 0;
-    for (int[] decodeInfo : FORMAT_INFO_DECODE_LOOKUP) {
-      int targetInfo = decodeInfo[0];
-      if (targetInfo == maskedFormatInfo1 || targetInfo == maskedFormatInfo2) {
-        // Found an exact match
-        return new FormatInformation(decodeInfo[1]);
-      }
-      int bitsDifference = numBitsDiffering(maskedFormatInfo1, targetInfo);
-      if (bitsDifference < bestDifference) {
-        bestFormatInfo = decodeInfo[1];
-        bestDifference = bitsDifference;
-      }
-      if (maskedFormatInfo1 != maskedFormatInfo2) {
-        // also try the other option
-        bitsDifference = numBitsDiffering(maskedFormatInfo2, targetInfo);
-        if (bitsDifference < bestDifference) {
-          bestFormatInfo = decodeInfo[1];
-          bestDifference = bitsDifference;
-        }
-      }
-    }
-    // Hamming distance of the 32 masked codes is 7, by construction, so <= 3 bits
-    // differing means we found a match
-    if (bestDifference <= 3) {
-      return new FormatInformation(bestFormatInfo);
-    }
-    return null;
-  }
-
-  ErrorCorrectionLevel getErrorCorrectionLevel() {
-    return errorCorrectionLevel;
-  }
-
-  byte getDataMask() {
-    return dataMask;
-  }
-
-  @Override
-  public int hashCode() {
-    return (errorCorrectionLevel.ordinal() << 3) | dataMask;
-  }
-
-  @Override
-  public boolean equals(Object o) {
-    if (!(o instanceof FormatInformation)) {
-      return false;
-    }
-    FormatInformation other = (FormatInformation) o;
-    return this.errorCorrectionLevel == other.errorCorrectionLevel &&
-        this.dataMask == other.dataMask;
-  }
-
-}

src/qrcode/decoder/error_correction_level.rs

@@ -22,7 +22,7 @@ use crate::Exceptions;
  *
  * @author Sean Owen
  */
-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[derive(Debug, PartialEq, Eq, Clone, Copy, Hash)]
 pub enum ErrorCorrectionLevel {
     /** L = ~7% correction */
     L, //0x01

src/qrcode/decoder/format_information.rs

@@ -0,0 +1,174 @@
+/*
+ * Copyright 2007 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+use super::ErrorCorrectionLevel;
+
+const FORMAT_INFO_MASK_QR: u32 = 0x5412;
+
+/**
+ * See ISO 18004:2006, Annex C, Table C.1
+ */
+const FORMAT_INFO_DECODE_LOOKUP: [[u32; 2]; 32] = [
+    [0x5412, 0x00],
+    [0x5125, 0x01],
+    [0x5E7C, 0x02],
+    [0x5B4B, 0x03],
+    [0x45F9, 0x04],
+    [0x40CE, 0x05],
+    [0x4F97, 0x06],
+    [0x4AA0, 0x07],
+    [0x77C4, 0x08],
+    [0x72F3, 0x09],
+    [0x7DAA, 0x0A],
+    [0x789D, 0x0B],
+    [0x662F, 0x0C],
+    [0x6318, 0x0D],
+    [0x6C41, 0x0E],
+    [0x6976, 0x0F],
+    [0x1689, 0x10],
+    [0x13BE, 0x11],
+    [0x1CE7, 0x12],
+    [0x19D0, 0x13],
+    [0x0762, 0x14],
+    [0x0255, 0x15],
+    [0x0D0C, 0x16],
+    [0x083B, 0x17],
+    [0x355F, 0x18],
+    [0x3068, 0x19],
+    [0x3F31, 0x1A],
+    [0x3A06, 0x1B],
+    [0x24B4, 0x1C],
+    [0x2183, 0x1D],
+    [0x2EDA, 0x1E],
+    [0x2BED, 0x1F],
+];
+
+/**
+ * <p>Encapsulates a QR Code's format information, including the data mask used and
+ * error correction level.</p>
+ *
+ * @author Sean Owen
+ * @see DataMask
+ * @see ErrorCorrectionLevel
+ */
+#[derive(Hash, Eq, PartialEq)]
+pub struct FormatInformation {
+    error_correction_level: ErrorCorrectionLevel,
+    data_mask: u8,
+}
+
+impl FormatInformation {
+    fn new(format_info: u8) -> Self {
+        // Bits 3,4
+        let errorCorrectionLevel =
+            ErrorCorrectionLevel::forBits((format_info >> 3) & 0x03).expect("pass in valid bits");
+        // Bottom 3 bits
+        let dataMask = format_info & 0x07;
+        Self {
+            error_correction_level: errorCorrectionLevel,
+            data_mask: dataMask,
+        }
+    }
+
+    pub fn numBitsDiffering(a: u32, b: u32) -> u32 {
+        (a ^ b).count_ones()
+        // return Integer.bitCount(a ^ b);
+    }
+
+    /**
+     * @param maskedFormatInfo1 format info indicator, with mask still applied
+     * @param maskedFormatInfo2 second copy of same info; both are checked at the same time
+     *  to establish best match
+     * @return information about the format it specifies, or {@code null}
+     *  if doesn't seem to match any known pattern
+     */
+    fn decodeFormatInformation(
+        maskedFormatInfo1: u32,
+        maskedFormatInfo2: u32,
+    ) -> FormatInformation {
+        let formatInfo = Self::doDecodeFormatInformation(maskedFormatInfo1, maskedFormatInfo2);
+        if formatInfo.is_some() {
+            return formatInfo.unwrap();
+        }
+        // Should return null, but, some QR codes apparently
+        // do not mask this info. Try again by actually masking the pattern
+        // first
+        return Self::doDecodeFormatInformation(
+            maskedFormatInfo1 ^ FORMAT_INFO_MASK_QR,
+            maskedFormatInfo2 ^ FORMAT_INFO_MASK_QR,
+        )
+        .unwrap();
+    }
+
+    fn doDecodeFormatInformation(
+        masked_format_info1: u32,
+        masked_format_info2: u32,
+    ) -> Option<FormatInformation> {
+        // Find the int in FORMAT_INFO_DECODE_LOOKUP with fewest bits differing
+        let best_difference = u32::MAX;
+        let best_format_info = 0;
+        for decodeInfo in FORMAT_INFO_DECODE_LOOKUP {
+            // for (int[] decodeInfo : FORMAT_INFO_DECODE_LOOKUP) {
+            let targetInfo = decodeInfo[0];
+            if targetInfo == masked_format_info1 || targetInfo == masked_format_info2 {
+                // Found an exact match
+                return Some(FormatInformation::new(decodeInfo[1] as u8));
+            }
+            let bits_difference = Self::numBitsDiffering(masked_format_info1, targetInfo);
+            if bits_difference < best_difference {
+                best_format_info = decodeInfo[1] as u8;
+                best_difference = bits_difference;
+            }
+            if masked_format_info1 != masked_format_info2 {
+                // also try the other option
+                bits_difference = Self::numBitsDiffering(masked_format_info2, targetInfo);
+                if (bits_difference < best_difference) {
+                    best_format_info = decodeInfo[1] as u8;
+                    best_difference = bits_difference;
+                }
+            }
+        }
+        // Hamming distance of the 32 masked codes is 7, by construction, so <= 3 bits
+        // differing means we found a match
+        if best_difference <= 3 {
+            return Some(FormatInformation::new(best_format_info));
+        }
+        None
+    }
+
+    pub fn getErrorCorrectionLevel(&self) -> &ErrorCorrectionLevel {
+        &self.error_correction_level
+    }
+
+    pub fn getDataMask(&self) -> u8 {
+        self.data_mask
+    }
+
+    // @Override
+    // public int hashCode() {
+    //   return (errorCorrectionLevel.ordinal() << 3) | dataMask;
+    // }
+
+    // @Override
+    // public boolean equals(Object o) {
+    //   if (!(o instanceof FormatInformation)) {
+    //     return false;
+    //   }
+    //   FormatInformation other = (FormatInformation) o;
+    //   return this.errorCorrectionLevel == other.errorCorrectionLevel &&
+    //       this.dataMask == other.dataMask;
+    // }
+}

src/qrcode/decoder/mod.rs

@@ -1,10 +1,12 @@
 mod version;
 mod mode;
 mod error_correction_level;
+mod format_information;
 
 #[cfg(test)]
 mod ErrorCorrectionLevelTestCase;
 
 pub use version::*;
 pub use mode::*;
-pub use error_correction_level::*;
+pub use error_correction_level::*;
+pub use format_information::*;

src/qrcode/decoder/mode.rs

@@ -16,6 +16,8 @@
 
 use crate::Exceptions;
 
+use super::Version;
+
 /**
  * <p>See ISO 18004:2006, 6.4.1, Tables 2 and 3. This enum encapsulates the various modes in which
  * data can be encoded to bits in the QR code standard.</p>