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Improve constiness.

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This commit is contained in:
Thomas Harte 2024-12-07 11:50:18 -06:00
parent b15a083a15
commit 0d52cf5f97
2 changed files with 7 additions and 7 deletions
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12
Storage/Disk/Encodings/CommodoreGCR.cpp
View File

@ -11,12 +11,12 @@
using namespace Storage; using namespace Storage;
Time Storage::Encodings::CommodoreGCR::length_of_a_bit_in_time_zone(unsigned int time_zone) { Time Storage::Encodings::CommodoreGCR::length_of_a_bit_in_time_zone(const unsigned int time_zone) {
// the speed zone divides a 4Mhz clock by 13, 14, 15 or 16, with higher-numbered zones being faster (i.e. each bit taking less time) // the speed zone divides a 4Mhz clock by 13, 14, 15 or 16, with higher-numbered zones being faster (i.e. each bit taking less time)
return Time(16 - time_zone, 4000000u); return Time(16 - time_zone, 4000000u);
} }
unsigned int Storage::Encodings::CommodoreGCR::encoding_for_nibble(uint8_t nibble) { unsigned int Storage::Encodings::CommodoreGCR::encoding_for_nibble(const uint8_t nibble) {
switch(nibble & 0xf) { switch(nibble & 0xf) {
case 0x0: return 0x0a; case 0x1: return 0x0b; case 0x0: return 0x0a; case 0x1: return 0x0b;
case 0x2: return 0x12; case 0x3: return 0x13; case 0x2: return 0x12; case 0x3: return 0x13;
@ -32,7 +32,7 @@ unsigned int Storage::Encodings::CommodoreGCR::encoding_for_nibble(uint8_t nibbl
} }
} }
unsigned int Storage::Encodings::CommodoreGCR::decoding_from_quintet(unsigned int quintet) { unsigned int Storage::Encodings::CommodoreGCR::decoding_from_quintet(const unsigned int quintet) {
switch(quintet & 0x1f) { switch(quintet & 0x1f) {
case 0x0a: return 0x0; case 0x0b: return 0x1; case 0x0a: return 0x0; case 0x0b: return 0x1;
case 0x12: return 0x2; case 0x13: return 0x3; case 0x12: return 0x2; case 0x13: return 0x3;
@ -47,15 +47,15 @@ unsigned int Storage::Encodings::CommodoreGCR::decoding_from_quintet(unsigned in
} }
} }
unsigned int Storage::Encodings::CommodoreGCR::encoding_for_byte(uint8_t byte) { unsigned int Storage::Encodings::CommodoreGCR::encoding_for_byte(const uint8_t byte) {
return encoding_for_nibble(byte) | (encoding_for_nibble(byte >> 4) << 5); return encoding_for_nibble(byte) | (encoding_for_nibble(byte >> 4) << 5);
} }
unsigned int Storage::Encodings::CommodoreGCR::decoding_from_dectet(unsigned int dectet) { unsigned int Storage::Encodings::CommodoreGCR::decoding_from_dectet(const unsigned int dectet) {
return decoding_from_quintet(dectet) | (decoding_from_quintet(dectet >> 5) << 4); return decoding_from_quintet(dectet) | (decoding_from_quintet(dectet >> 5) << 4);
} }
void Storage::Encodings::CommodoreGCR::encode_block(uint8_t *destination, uint8_t *source) { void Storage::Encodings::CommodoreGCR::encode_block(uint8_t *const destination, const uint8_t *const source) {
unsigned int encoded_bytes[4] = { unsigned int encoded_bytes[4] = {
encoding_for_byte(source[0]), encoding_for_byte(source[0]),
encoding_for_byte(source[1]), encoding_for_byte(source[1]),

2
Storage/Disk/Encodings/CommodoreGCR.hpp
View File

@ -33,7 +33,7 @@ namespace CommodoreGCR {
/*! /*!
A block is defined to be four source bytes, which encodes to five GCR bytes. A block is defined to be four source bytes, which encodes to five GCR bytes.
*/ */
void encode_block(uint8_t *destination, uint8_t *source); void encode_block(uint8_t *destination, const uint8_t *source);
/*! /*!
@returns the four bit nibble for the five-bit GCR @c quintet if a valid GCR value; INT_MAX otherwise. @returns the four bit nibble for the five-bit GCR @c quintet if a valid GCR value; INT_MAX otherwise.