mirror of
https://github.com/letic/terraform-provider-google.git
synced 2024-09-07 01:26:43 +00:00
133 lines
3.8 KiB
Ragel
133 lines
3.8 KiB
Ragel
package textseg
|
|
|
|
import (
|
|
"errors"
|
|
"unicode/utf8"
|
|
)
|
|
|
|
// Generated from grapheme_clusters.rl. DO NOT EDIT
|
|
%%{
|
|
# (except you are actually in grapheme_clusters.rl here, so edit away!)
|
|
|
|
machine graphclust;
|
|
write data;
|
|
}%%
|
|
|
|
var Error = errors.New("invalid UTF8 text")
|
|
|
|
// ScanGraphemeClusters is a split function for bufio.Scanner that splits
|
|
// on grapheme cluster boundaries.
|
|
func ScanGraphemeClusters(data []byte, atEOF bool) (int, []byte, error) {
|
|
if len(data) == 0 {
|
|
return 0, nil, nil
|
|
}
|
|
|
|
// Ragel state
|
|
cs := 0 // Current State
|
|
p := 0 // "Pointer" into data
|
|
pe := len(data) // End-of-data "pointer"
|
|
ts := 0
|
|
te := 0
|
|
act := 0
|
|
eof := pe
|
|
|
|
// Make Go compiler happy
|
|
_ = ts
|
|
_ = te
|
|
_ = act
|
|
_ = eof
|
|
|
|
startPos := 0
|
|
endPos := 0
|
|
|
|
%%{
|
|
include GraphemeCluster "grapheme_clusters_table.rl";
|
|
|
|
action start {
|
|
startPos = p
|
|
}
|
|
|
|
action end {
|
|
endPos = p
|
|
}
|
|
|
|
action emit {
|
|
return endPos+1, data[startPos:endPos+1], nil
|
|
}
|
|
|
|
ZWJGlue = ZWJ (Glue_After_Zwj | E_Base_GAZ Extend* E_Modifier?)?;
|
|
AnyExtender = Extend | ZWJGlue | SpacingMark;
|
|
Extension = AnyExtender*;
|
|
ReplacementChar = (0xEF 0xBF 0xBD);
|
|
|
|
CRLFSeq = CR LF;
|
|
ControlSeq = Control | ReplacementChar;
|
|
HangulSeq = (
|
|
L+ (((LV? V+ | LVT) T*)?|LV?) |
|
|
LV V* T* |
|
|
V+ T* |
|
|
LVT T* |
|
|
T+
|
|
) Extension;
|
|
EmojiSeq = (E_Base | E_Base_GAZ) Extend* E_Modifier? Extension;
|
|
ZWJSeq = ZWJGlue Extension;
|
|
EmojiFlagSeq = Regional_Indicator Regional_Indicator? Extension;
|
|
|
|
UTF8Cont = 0x80 .. 0xBF;
|
|
AnyUTF8 = (
|
|
0x00..0x7F |
|
|
0xC0..0xDF . UTF8Cont |
|
|
0xE0..0xEF . UTF8Cont . UTF8Cont |
|
|
0xF0..0xF7 . UTF8Cont . UTF8Cont . UTF8Cont
|
|
);
|
|
|
|
# OtherSeq is any character that isn't at the start of one of the extended sequences above, followed by extension
|
|
OtherSeq = (AnyUTF8 - (CR|LF|Control|ReplacementChar|L|LV|V|LVT|T|E_Base|E_Base_GAZ|ZWJ|Regional_Indicator|Prepend)) Extension;
|
|
|
|
# PrependSeq is prepend followed by any of the other patterns above, except control characters which explicitly break
|
|
PrependSeq = Prepend+ (HangulSeq|EmojiSeq|ZWJSeq|EmojiFlagSeq|OtherSeq)?;
|
|
|
|
CRLFTok = CRLFSeq >start @end;
|
|
ControlTok = ControlSeq >start @end;
|
|
HangulTok = HangulSeq >start @end;
|
|
EmojiTok = EmojiSeq >start @end;
|
|
ZWJTok = ZWJSeq >start @end;
|
|
EmojiFlagTok = EmojiFlagSeq >start @end;
|
|
OtherTok = OtherSeq >start @end;
|
|
PrependTok = PrependSeq >start @end;
|
|
|
|
main := |*
|
|
CRLFTok => emit;
|
|
ControlTok => emit;
|
|
HangulTok => emit;
|
|
EmojiTok => emit;
|
|
ZWJTok => emit;
|
|
EmojiFlagTok => emit;
|
|
PrependTok => emit;
|
|
OtherTok => emit;
|
|
|
|
# any single valid UTF-8 character would also be valid per spec,
|
|
# but we'll handle that separately after the loop so we can deal
|
|
# with requesting more bytes if we're not at EOF.
|
|
*|;
|
|
|
|
write init;
|
|
write exec;
|
|
}%%
|
|
|
|
// If we fall out here then we were unable to complete a sequence.
|
|
// If we weren't able to complete a sequence then either we've
|
|
// reached the end of a partial buffer (so there's more data to come)
|
|
// or we have an isolated symbol that would normally be part of a
|
|
// grapheme cluster but has appeared in isolation here.
|
|
|
|
if !atEOF {
|
|
// Request more
|
|
return 0, nil, nil
|
|
}
|
|
|
|
// Just take the first UTF-8 sequence and return that.
|
|
_, seqLen := utf8.DecodeRune(data)
|
|
return seqLen, data[:seqLen], nil
|
|
}
|