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QR-Code-generator
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Simplified some pieces of Rust code.

This commit is contained in:
Project Nayuki 2019-09-12 17:26:51 +00:00
parent 765527895c
commit 9fdd05e64d
1 changed files with 7 additions and 11 deletions
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18
rust/src/lib.rs
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@ -208,15 +208,13 @@ impl QrCode {
// Find the minimal version number to use
let mut version = minversion;
let datausedbits: usize;
loop {
let datausedbits: usize = loop {
// Number of data bits available
let datacapacitybits: usize = QrCode::get_num_data_codewords(version, ecl) * 8;
let dataused: Option<usize> = QrSegment::get_total_bits(segs, version);
if let Some(n) = dataused {
if n <= datacapacitybits {
datausedbits = n;
break; // This version number is found to be suitable
break n; // This version number is found to be suitable
}
}
if version.value() >= maxversion.value() { // All versions in the range could not fit the given data
@ -228,7 +226,7 @@ impl QrCode {
return Err(DataTooLong(msg));
}
version = Version::new(version.value() + 1);
}
};
// Increase the error correction level while the data still fits in the current version number
for newecl in &[QrCodeEcc::Medium, QrCodeEcc::Quartile, QrCodeEcc::High] { // From low to high
@ -559,8 +557,9 @@ impl QrCode {
let rsdiv: Vec<u8> = QrCode::reed_solomon_compute_divisor(blockecclen);
let mut k: usize = 0;
for i in 0 .. numblocks {
let mut dat = data[k .. k + shortblocklen - blockecclen + usize::from(i >= numshortblocks)].to_vec();
k += dat.len();
let datlen: usize = shortblocklen - blockecclen + usize::from(i >= numshortblocks);
let mut dat = data[k .. k + datlen].to_vec();
k += datlen;
let ecc: Vec<u8> = QrCode::reed_solomon_compute_remainder(&dat, &rsdiv);
if i < numshortblocks {
dat.push(0);
@ -712,10 +711,7 @@ impl QrCode {
}
// Balance of black and white modules
let mut black: i32 = 0;
for color in &self.modules {
black += i32::from(*color);
}
let black: i32 = self.modules.iter().copied().map(i32::from).sum();
let total: i32 = size * size; // Note that size is odd, so black/total != 1/2
// Compute the smallest integer k >= 0 such that (45-5k)% <= black/total <= (55+5k)%
let k: i32 = ((black * 20 - total * 10).abs() + total - 1) / total - 1;