106 lines
2.7 KiB
Go
106 lines
2.7 KiB
Go
package kv
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import (
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"codeberg.org/gruf/go-byteutil"
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)
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// bufsize is the default buffer size per field to alloc
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// when calling .AppendFormat() from within .String().
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const bufsize = 64
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// Fields is a typedef for a []Field slice to provide
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// slightly more performant string formatting for multiples.
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type Fields []Field
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// Get will return the field with given 'key'.
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func (f Fields) Get(key string) (*Field, bool) {
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for i := 0; i < len(f); i++ {
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if f[i].K == key {
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return &f[i], true
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}
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}
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return nil, false
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}
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// Set will set an existing field with 'key' to 'value', or append new.
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func (f *Fields) Set(key string, value interface{}) {
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for i := 0; i < len(*f); i++ {
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// Update existing value
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if (*f)[i].K == key {
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(*f)[i].V = value
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return
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}
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}
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// Append new field
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*f = append(*f, Field{
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K: key,
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V: value,
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})
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}
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// AppendFormat appends a string representation of receiving Field(s) to 'b'.
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func (f Fields) AppendFormat(buf *byteutil.Buffer, vbose bool) {
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for i := 0; i < len(f); i++ {
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f[i].AppendFormat(buf, vbose)
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buf.WriteByte(' ')
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}
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if len(f) > 0 {
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buf.Truncate(1)
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}
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}
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// String returns a string representation of receiving Field(s).
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func (f Fields) String() string {
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b := make([]byte, 0, bufsize*len(f))
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buf := byteutil.Buffer{B: b}
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f.AppendFormat(&buf, false)
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return buf.String()
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}
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// GoString performs .String() but with type prefix.
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func (f Fields) GoString() string {
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b := make([]byte, 0, bufsize*len(f))
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buf := byteutil.Buffer{B: b}
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f.AppendFormat(&buf, true)
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return "kv.Fields{" + buf.String() + "}"
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}
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// Field represents an individual key-value field.
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type Field struct {
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K string // Field key
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V interface{} // Field value
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}
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// Key returns the formatted key string of this Field.
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func (f Field) Key() string {
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buf := byteutil.Buffer{B: make([]byte, 0, bufsize/2)}
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AppendQuoteString(&buf, f.K)
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return buf.String()
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}
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// String will return a string representation of this Field
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// of the form `key=value` where `value` is formatted using
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// fmt package's `%+v` directive. If the .X = true (verbose),
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// then it uses '%#v'. Both key and value are escaped and
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// quoted if necessary to fit on single line.
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//
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// If the `kvformat` build tag is provided, the formatting
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// will be performed by the `kv/format` package. In this case
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// the value will be formatted using the `{:v}` directive, or
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// `{:?}` if .X = true (verbose).
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func (f Field) String() string {
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b := make([]byte, 0, bufsize)
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buf := byteutil.Buffer{B: b}
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f.AppendFormat(&buf, false)
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return buf.String()
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}
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// GoString performs .String() but with verbose always enabled.
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func (f Field) GoString() string {
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b := make([]byte, 0, bufsize)
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buf := byteutil.Buffer{B: b}
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f.AppendFormat(&buf, true)
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return buf.String()
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}
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