diff options
Diffstat (limited to 'vendor/golang.org/x/text/cases/trieval.go')
| -rw-r--r-- | vendor/golang.org/x/text/cases/trieval.go | 73 |
1 files changed, 38 insertions, 35 deletions
diff --git a/vendor/golang.org/x/text/cases/trieval.go b/vendor/golang.org/x/text/cases/trieval.go index 99e039628..4e4d13fe5 100644 --- a/vendor/golang.org/x/text/cases/trieval.go +++ b/vendor/golang.org/x/text/cases/trieval.go @@ -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 @@ -128,37 +128,40 @@ const ( // The entry is pointed to by the exception index in an entry. It has the // following format: // -// Header -// byte 0: -// 7..6 unused -// 5..4 CCC type (same bits as entry) -// 3 unused -// 2..0 length of fold +// Header: // -// byte 1: -// 7..6 unused -// 5..3 length of 1st mapping of case type -// 2..0 length of 2nd mapping of case type +// byte 0: +// 7..6 unused +// 5..4 CCC type (same bits as entry) +// 3 unused +// 2..0 length of fold // -// case 1st 2nd -// lower -> upper, title -// upper -> lower, title -// title -> lower, upper +// 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 // // 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. |