Revert "Upgrade to go 1.19 and update dependencies (#3069)" (#3085)

This reverts commit bba7c23957.
This commit is contained in:
WithoutPants
2022-11-07 12:33:15 +11:00
committed by GitHub
parent bba7c23957
commit 2609095c7a
939 changed files with 43785 additions and 101302 deletions

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@@ -14,19 +14,19 @@ package cases
//
// The per-rune values have the following format:
//
// if (exception) {
// 15..4 unsigned exception index
// } else {
// 15..8 XOR pattern or index to XOR pattern for case mapping
// Only 13..8 are used for XOR patterns.
// 7 inverseFold (fold to upper, not to lower)
// 6 index: interpret the XOR pattern as an index
// or isMid if case mode is cIgnorableUncased.
// 5..4 CCC: zero (normal or break), above or other
// }
// 3 exception: interpret this value as an exception index
// (TODO: is this bit necessary? Probably implied from case mode.)
// 2..0 case mode
// if (exception) {
// 15..4 unsigned exception index
// } else {
// 15..8 XOR pattern or index to XOR pattern for case mapping
// Only 13..8 are used for XOR patterns.
// 7 inverseFold (fold to upper, not to lower)
// 6 index: interpret the XOR pattern as an index
// or isMid if case mode is cIgnorableUncased.
// 5..4 CCC: zero (normal or break), above or other
// }
// 3 exception: interpret this value as an exception index
// (TODO: is this bit necessary? Probably implied from case mode.)
// 2..0 case mode
//
// For the non-exceptional cases, a rune must be either uncased, lowercase or
// uppercase. If the rune is cased, the XOR pattern maps either a lowercase
@@ -128,40 +128,37 @@ const (
// The entry is pointed to by the exception index in an entry. It has the
// following format:
//
// Header:
// Header
// byte 0:
// 7..6 unused
// 5..4 CCC type (same bits as entry)
// 3 unused
// 2..0 length of fold
//
// byte 0:
// 7..6 unused
// 5..4 CCC type (same bits as entry)
// 3 unused
// 2..0 length of fold
// byte 1:
// 7..6 unused
// 5..3 length of 1st mapping of case type
// 2..0 length of 2nd mapping of case type
//
// byte 1:
// 7..6 unused
// 5..3 length of 1st mapping of case type
// 2..0 length of 2nd mapping of case type
//
// case 1st 2nd
// lower -> upper, title
// upper -> lower, title
// title -> lower, upper
// case 1st 2nd
// lower -> upper, title
// upper -> lower, title
// title -> lower, upper
//
// Lengths with the value 0x7 indicate no value and implies no change.
// A length of 0 indicates a mapping to zero-length string.
//
// Body bytes:
//
// case folding bytes
// lowercase mapping bytes
// uppercase mapping bytes
// titlecase mapping bytes
// closure mapping bytes (for NFKC_Casefold). (TODO)
// case folding bytes
// lowercase mapping bytes
// uppercase mapping bytes
// titlecase mapping bytes
// closure mapping bytes (for NFKC_Casefold). (TODO)
//
// Fallbacks:
//
// missing fold -> lower
// missing title -> upper
// all missing -> original rune
// missing fold -> lower
// missing title -> upper
// all missing -> original rune
//
// exceptions starts with a dummy byte to enforce that there is no zero index
// value.