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authorLibravatar kim <grufwub@gmail.com>2025-08-21 16:41:50 +0200
committerLibravatar kim <gruf@noreply.codeberg.org>2025-08-21 16:41:50 +0200
commita79f83cbded3fb1165b338ce316dc9f2217467ff (patch)
tree4b4a2b7084aced51c0a691cee6352b4ecae90df8 /vendor/codeberg.org/gruf/go-structr/runtime.go
parent[chore] bump golangci-lint version in CI, disable var-naming package name che... (diff)
downloadgotosocial-a79f83cbded3fb1165b338ce316dc9f2217467ff.tar.xz
[chore] update dependencies (#4386)
- codeberg.org/gruf/go-bytesize v1.0.3 -> v1.0.4 - codeberg.org/gruf/go-kv/v2 v2.0.6 -> v2.0.7 - codeberg.org/gruf/go-mutexes v1.5.2 -> v1.5.3 - codeberg.org/gruf/go-structr v0.9.7 -> v0.9.8 - codeberg.org/gruf/go-ffmpreg v0.6.8 -> v0.6.9 - github.com/tomnomnom/linkheader HEAD@2018 -> HEAD@2025 all of the above codeberg.org/gruf updates are in preparation for Go1.25, except for bytesize, and also ffmpreg which is a rebuild with the latest version of ffmpeg (v5.1.7) Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4386 Co-authored-by: kim <grufwub@gmail.com> Co-committed-by: kim <grufwub@gmail.com>
Diffstat (limited to 'vendor/codeberg.org/gruf/go-structr/runtime.go')
-rw-r--r--vendor/codeberg.org/gruf/go-structr/runtime.go169
1 files changed, 77 insertions, 92 deletions
diff --git a/vendor/codeberg.org/gruf/go-structr/runtime.go b/vendor/codeberg.org/gruf/go-structr/runtime.go
index 1d379b70d..c1a883462 100644
--- a/vendor/codeberg.org/gruf/go-structr/runtime.go
+++ b/vendor/codeberg.org/gruf/go-structr/runtime.go
@@ -1,5 +1,3 @@
-//go:build go1.22 && !go1.25
-
package structr
import (
@@ -11,17 +9,16 @@ import (
"unicode/utf8"
"unsafe"
- "codeberg.org/gruf/go-mangler"
+ "codeberg.org/gruf/go-mangler/v2"
+ "codeberg.org/gruf/go-xunsafe"
)
// struct_field contains pre-prepared type
// information about a struct's field member,
// including memory offset and hash function.
type struct_field struct {
- rtype reflect.Type
- // struct field type mangling
- // (i.e. fast serializing) fn.
+ // mangle ...
mangle mangler.Mangler
// zero value data, used when
@@ -30,18 +27,13 @@ type struct_field struct {
zero unsafe.Pointer
// mangled zero value string,
- // if set this indicates zero
- // values of field not allowed
+ // to check zero value keys.
zerostr string
// offsets defines whereabouts in
- // memory this field is located.
+ // memory this field is located,
+ // and after how many dereferences.
offsets []next_offset
-
- // determines whether field type
- // is ptr-like in-memory, and so
- // requires a further dereference.
- likeptr bool
}
// next_offset defines a next offset location
@@ -49,13 +41,22 @@ type struct_field struct {
// derefences required, then by offset from
// that final memory location.
type next_offset struct {
- derefs uint
+ derefs int
offset uintptr
}
+// get_type_iter returns a prepared xunsafe.TypeIter{} for generic parameter type,
+// with flagIndir specifically set as we always take a reference to value type.
+func get_type_iter[T any]() xunsafe.TypeIter {
+ rtype := reflect.TypeOf((*T)(nil)).Elem()
+ flags := xunsafe.Reflect_flag(xunsafe.Abi_Type_Kind(rtype))
+ flags |= xunsafe.Reflect_flagIndir // always comes from unsafe ptr
+ return xunsafe.ToTypeIter(rtype, flags)
+}
+
// find_field will search for a struct field with given set of names,
// where names is a len > 0 slice of names account for struct nesting.
-func find_field(t reflect.Type, names []string) (sfield struct_field) {
+func find_field(t xunsafe.TypeIter, names []string) (sfield struct_field, ftype reflect.Type) {
var (
// is_exported returns whether name is exported
// from a package; can be func or struct field.
@@ -84,23 +85,42 @@ func find_field(t reflect.Type, names []string) (sfield struct_field) {
// Pop next name.
name := pop_name()
- var off next_offset
+ var n int
+ rtype := t.Type
+ flags := t.Flag
+
+ // Iteratively dereference pointer types.
+ for rtype.Kind() == reflect.Pointer {
+
+ // If this actual indirect memory,
+ // increase dereferences counter.
+ if flags&xunsafe.Reflect_flagIndir != 0 {
+ n++
+ }
- // Dereference any ptrs to struct.
- for t.Kind() == reflect.Pointer {
- t = t.Elem()
- off.derefs++
+ // Get next elem type.
+ rtype = rtype.Elem()
+
+ // Get next set of dereferenced element type flags.
+ flags = xunsafe.ReflectPointerElemFlags(flags, rtype)
+
+ // Update type iter info.
+ t = t.Child(rtype, flags)
}
// Check for valid struct type.
- if t.Kind() != reflect.Struct {
- panic(fmt.Sprintf("field %s is not struct (or ptr-to): %s", t, name))
+ if rtype.Kind() != reflect.Struct {
+ panic(fmt.Sprintf("field %s is not struct (or ptr-to): %s", rtype, name))
}
+ // Set offset info.
+ var off next_offset
+ off.derefs = n
+
var ok bool
- // Look for next field by name.
- field, ok = t.FieldByName(name)
+ // Look for the next field by name.
+ field, ok = rtype.FieldByName(name)
if !ok {
panic(fmt.Sprintf("unknown field: %s", name))
}
@@ -109,24 +129,29 @@ func find_field(t reflect.Type, names []string) (sfield struct_field) {
off.offset = field.Offset
sfield.offsets = append(sfield.offsets, off)
- // Set the next type.
- t = field.Type
+ // Calculate value flags, and set next nested field type.
+ flags = xunsafe.ReflectStructFieldFlags(t.Flag, field.Type)
+ t = t.Child(field.Type, flags)
}
- // Check if ptr-like in-memory.
- sfield.likeptr = like_ptr(t)
+ // Set final field type.
+ ftype = t.TypeInfo.Type
- // Set final type.
- sfield.rtype = t
-
- // Find mangler for field type.
+ // Get mangler from type info.
sfield.mangle = mangler.Get(t)
- // Get new zero value data ptr.
- v := reflect.New(t).Elem()
- zptr := eface_data(v.Interface())
- zstr := sfield.mangle(nil, zptr)
- sfield.zerostr = string(zstr)
+ // Get field type as zero interface.
+ v := reflect.New(t.Type).Elem()
+ vi := v.Interface()
+
+ // Get argument mangler from iface.
+ ti := xunsafe.TypeIterFrom(vi)
+ mangleArg := mangler.Get(ti)
+
+ // Calculate zero value string.
+ zptr := xunsafe.UnpackEface(vi)
+ zstr := string(mangleArg(nil, zptr))
+ sfield.zerostr = zstr
sfield.zero = zptr
return
@@ -158,11 +183,6 @@ func extract_fields(ptr unsafe.Pointer, fields []struct_field) []unsafe.Pointer
offset.offset)
}
- if field.likeptr && fptr != nil {
- // Further dereference value ptr.
- fptr = *(*unsafe.Pointer)(fptr)
- }
-
if fptr == nil {
// Use zero value.
fptr = field.zero
@@ -179,26 +199,26 @@ func extract_fields(ptr unsafe.Pointer, fields []struct_field) []unsafe.Pointer
// information about a primary key struct's
// field member, including memory offset.
type pkey_field struct {
- rtype reflect.Type
+
+ // zero value data, used when
+ // nil encountered during ptr
+ // offset following.
+ zero unsafe.Pointer
// offsets defines whereabouts in
// memory this field is located.
offsets []next_offset
-
- // determines whether field type
- // is ptr-like in-memory, and so
- // requires a further dereference.
- likeptr bool
}
// extract_pkey will extract a pointer from 'ptr', to
// the primary key struct field defined by 'field'.
func extract_pkey(ptr unsafe.Pointer, field pkey_field) unsafe.Pointer {
for _, offset := range field.offsets {
+
// Dereference any ptrs to offset.
ptr = deref(ptr, offset.derefs)
if ptr == nil {
- return nil
+ break
}
// Jump forward by offset to next ptr.
@@ -206,43 +226,16 @@ func extract_pkey(ptr unsafe.Pointer, field pkey_field) unsafe.Pointer {
offset.offset)
}
- if field.likeptr && ptr != nil {
- // Further dereference value ptr.
- ptr = *(*unsafe.Pointer)(ptr)
+ if ptr == nil {
+ // Use zero value.
+ ptr = field.zero
}
return ptr
}
-// like_ptr returns whether type's kind is ptr-like in-memory,
-// which indicates it may need a final additional dereference.
-func like_ptr(t reflect.Type) bool {
- switch t.Kind() {
- case reflect.Array:
- switch n := t.Len(); n {
- case 1:
- // specifically single elem arrays
- // follow like_ptr for contained type.
- return like_ptr(t.Elem())
- }
- case reflect.Struct:
- switch n := t.NumField(); n {
- case 1:
- // specifically single field structs
- // follow like_ptr for contained type.
- return like_ptr(t.Field(0).Type)
- }
- case reflect.Pointer,
- reflect.Map,
- reflect.Chan,
- reflect.Func:
- return true
- }
- return false
-}
-
// deref will dereference ptr 'n' times (or until nil).
-func deref(p unsafe.Pointer, n uint) unsafe.Pointer {
+func deref(p unsafe.Pointer, n int) unsafe.Pointer {
for ; n > 0; n-- {
if p == nil {
return nil
@@ -252,24 +245,16 @@ func deref(p unsafe.Pointer, n uint) unsafe.Pointer {
return p
}
-// eface_data returns the data ptr from an empty interface.
-func eface_data(a any) unsafe.Pointer {
- type eface struct{ _, data unsafe.Pointer }
- return (*eface)(unsafe.Pointer(&a)).data
-}
-
// assert can be called to indicated a block
// of code should not be able to be reached,
// it returns a BUG report with callsite.
-//
-//go:noinline
func assert(assert string) string {
pcs := make([]uintptr, 1)
_ = runtime.Callers(2, pcs)
- fn := runtime.FuncForPC(pcs[0])
funcname := "go-structr" // by default use just our library name
- if fn != nil {
- funcname = fn.Name()
+ if frames := runtime.CallersFrames(pcs); frames != nil {
+ frame, _ := frames.Next()
+ funcname = frame.Function
if i := strings.LastIndexByte(funcname, '/'); i != -1 {
funcname = funcname[i+1:]
}