Tweaked BitBuffer.appendBits() comment in several language versions.

c/qrcodegen.c

@@ -177,6 +177,7 @@ bool qrcodegen_encodeBinary(uint8_t dataAndTemp[], size_t dataLen, uint8_t qrcod
 
 
 // Appends the given sequence of bits to the given byte-based bit buffer, increasing the bit length.
+// Requires 0 <= numBits <= 16 and 0 <= val < 2^numBits.
 testable void appendBitsToBuffer(unsigned int val, int numBits, uint8_t buffer[], int *bitLen) {
 	assert(0 <= numBits && numBits <= 16 && (unsigned long)val >> numBits == 0);
 	for (int i = numBits - 1; i >= 0; i--, (*bitLen)++)

cpp/BitBuffer.hpp

@@ -49,7 +49,7 @@ class BitBuffer final : public std::vector<bool> {
 	
 	
 	// Appends the given number of low bits of the given value
-	// to this sequence. Requires 0 <= val < 2^len.
+	// to this sequence. Requires 0 <= len <= 31 and 0 <= val < 2^len.
 	public: void appendBits(std::uint32_t val, int len);
 	
 };

rust/src/lib.rs

@@ -1065,7 +1065,7 @@ pub struct BitBuffer(pub Vec<bool>);
 
 impl BitBuffer {
 	// Appends the given number of low bits of the given value
-	// to this sequence. Requires 0 <= val < 2^len.
+	// to this sequence. Requires 0 <= len <= 31 and 0 <= val < 2^len.
 	pub fn append_bits(&mut self, val: u32, len: u8) {
 		assert!(len < 32 && (val >> len) == 0 || len == 32, "Value out of range");
 		self.0.extend((0 .. len as i32).rev().map(|i| get_bit(val, i)));  // Append bit by bit