mirror of
https://github.com/superseriousbusiness/gotosocial.git
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7ec1e1332e* rewrite cache library as codeberg.org/gruf/go-structr, implement in gotosocial
* use actual go-structr release version (not just commit hash)
* revert go toolchain changes (damn you go for auto changing this)
* fix go mod woes
* ensure %w is used in calls to errs.Appendf()
* fix error checking
* fix possible panic
* remove unnecessary start/stop functions, move to main Cache{} struct, add note regarding which caches require start/stop
* fix copy-paste artifact... 😇
* fix all comment copy-paste artifacts
* remove dropID() function, now we can just use slices.DeleteFunc()
* use util.Deduplicate() instead of collate(), move collate to util
* move orderByIDs() to util package and "generify"
* add a util.DeleteIf() function, use this to delete entries on failed population
* use slices.DeleteFunc() instead of util.DeleteIf() (i had the logic mixed up in my head somehow lol)
* add note about how collate differs from deduplicate
118 lines
2.5 KiB
Go
118 lines
2.5 KiB
Go
package structr
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import (
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"fmt"
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"reflect"
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"sync"
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"unicode"
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"unicode/utf8"
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"codeberg.org/gruf/go-byteutil"
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"codeberg.org/gruf/go-mangler"
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)
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// findField will search for a struct field with given set of names, where names is a len > 0 slice of names account for nesting.
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func findField(t reflect.Type, names []string, allowZero bool) (sfield structfield, ok bool) {
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var (
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// isExported returns whether name is exported
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// from a package; can be func or struct field.
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isExported = func(name string) bool {
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r, _ := utf8.DecodeRuneInString(name)
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return unicode.IsUpper(r)
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}
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// popName pops the next name from
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// the provided slice of field names.
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popName = func() string {
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// Pop next name.
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name := names[0]
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names = names[1:]
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// Ensure valid name.
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if !isExported(name) {
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panicf("field is not exported: %s", name)
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}
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return name
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}
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// field is the iteratively searched-for
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// struct field value in below loop.
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field reflect.StructField
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)
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for len(names) > 0 {
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// Pop next name.
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name := popName()
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// Follow any ptrs leading to field.
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for t.Kind() == reflect.Pointer {
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t = t.Elem()
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}
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if t.Kind() != reflect.Struct {
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// The end type after following ptrs must be struct.
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panicf("field %s is not struct (ptr): %s", t, name)
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}
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// Look for next field by name.
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field, ok = t.FieldByName(name)
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if !ok {
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return
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}
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// Append next set of indices required to reach field.
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sfield.index = append(sfield.index, field.Index...)
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// Set the next type.
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t = field.Type
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}
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// Get final type mangler func.
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sfield.mangler = mangler.Get(t)
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if allowZero {
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var buf []byte
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// Allocate field instance.
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v := reflect.New(field.Type)
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v = v.Elem()
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// Serialize this zero value into buf.
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buf = sfield.mangler(buf, v.Interface())
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// Set zero value str.
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sfield.zero = string(buf)
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}
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return
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}
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// panicf provides a panic with string formatting.
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func panicf(format string, args ...any) {
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panic(fmt.Sprintf(format, args...))
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}
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// bufpool provides a memory pool of byte
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// buffers used when encoding key types.
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var bufPool sync.Pool
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// getBuf fetches buffer from memory pool.
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func getBuf() *byteutil.Buffer {
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v := bufPool.Get()
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if v == nil {
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buf := new(byteutil.Buffer)
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buf.B = make([]byte, 0, 512)
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v = buf
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}
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return v.(*byteutil.Buffer)
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}
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// putBuf replaces buffer in memory pool.
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func putBuf(buf *byteutil.Buffer) {
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if buf.Cap() > int(^uint16(0)) {
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return // drop large bufs
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}
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buf.Reset()
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bufPool.Put(buf)
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}
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