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|
package scanner
import (
"sync"
"github.com/goccy/go-yaml/token"
)
// Context context at scanning
type Context struct {
idx int
size int
notSpaceCharPos int
notSpaceOrgCharPos int
src []rune
buf []rune
obuf []rune
tokens token.Tokens
isRawFolded bool
isLiteral bool
isFolded bool
isSingleLine bool
literalOpt string
}
var (
ctxPool = sync.Pool{
New: func() interface{} {
return createContext()
},
}
)
func createContext() *Context {
return &Context{
idx: 0,
tokens: token.Tokens{},
isSingleLine: true,
}
}
func newContext(src []rune) *Context {
ctx := ctxPool.Get().(*Context)
ctx.reset(src)
return ctx
}
func (c *Context) release() {
ctxPool.Put(c)
}
func (c *Context) reset(src []rune) {
c.idx = 0
c.size = len(src)
c.src = src
c.tokens = c.tokens[:0]
c.resetBuffer()
c.isSingleLine = true
}
func (c *Context) resetBuffer() {
c.buf = c.buf[:0]
c.obuf = c.obuf[:0]
c.notSpaceCharPos = 0
c.notSpaceOrgCharPos = 0
}
func (c *Context) isSaveIndentMode() bool {
return c.isLiteral || c.isFolded || c.isRawFolded
}
func (c *Context) breakLiteral() {
c.isLiteral = false
c.isRawFolded = false
c.isFolded = false
c.literalOpt = ""
}
func (c *Context) addToken(tk *token.Token) {
if tk == nil {
return
}
c.tokens = append(c.tokens, tk)
}
func (c *Context) addBuf(r rune) {
if len(c.buf) == 0 && r == ' ' {
return
}
c.buf = append(c.buf, r)
if r != ' ' && r != '\t' {
c.notSpaceCharPos = len(c.buf)
}
}
func (c *Context) addOriginBuf(r rune) {
c.obuf = append(c.obuf, r)
if r != ' ' && r != '\t' {
c.notSpaceOrgCharPos = len(c.obuf)
}
}
func (c *Context) removeRightSpaceFromBuf() int {
trimmedBuf := c.obuf[:c.notSpaceOrgCharPos]
buflen := len(trimmedBuf)
diff := len(c.obuf) - buflen
if diff > 0 {
c.obuf = c.obuf[:buflen]
c.buf = c.bufferedSrc()
}
return diff
}
func (c *Context) isDocument() bool {
return c.isLiteral || c.isFolded || c.isRawFolded
}
func (c *Context) isEOS() bool {
return len(c.src)-1 <= c.idx
}
func (c *Context) isNextEOS() bool {
return len(c.src)-1 <= c.idx+1
}
func (c *Context) next() bool {
return c.idx < c.size
}
func (c *Context) source(s, e int) string {
return string(c.src[s:e])
}
func (c *Context) previousChar() rune {
if c.idx > 0 {
return c.src[c.idx-1]
}
return rune(0)
}
func (c *Context) currentChar() rune {
return c.src[c.idx]
}
func (c *Context) nextChar() rune {
if c.size > c.idx+1 {
return c.src[c.idx+1]
}
return rune(0)
}
func (c *Context) repeatNum(r rune) int {
cnt := 0
for i := c.idx; i < c.size; i++ {
if c.src[i] == r {
cnt++
} else {
break
}
}
return cnt
}
func (c *Context) progress(num int) {
c.idx += num
}
func (c *Context) nextPos() int {
return c.idx + 1
}
func (c *Context) existsBuffer() bool {
return len(c.bufferedSrc()) != 0
}
func (c *Context) bufferedSrc() []rune {
src := c.buf[:c.notSpaceCharPos]
if len(src) > 0 && src[len(src)-1] == '\n' && c.isDocument() && c.literalOpt == "-" {
// remove end '\n' character
src = src[:len(src)-1]
}
return src
}
func (c *Context) bufferedToken(pos *token.Position) *token.Token {
if c.idx == 0 {
return nil
}
source := c.bufferedSrc()
if len(source) == 0 {
return nil
}
var tk *token.Token
if c.isDocument() {
tk = token.String(string(source), string(c.obuf), pos)
} else {
tk = token.New(string(source), string(c.obuf), pos)
}
c.resetBuffer()
return tk
}
|
