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package format
import "codeberg.org/gruf/go-xunsafe"
// iterSliceType returns a FormatFunc capable of iterating
// and formatting the given slice type currently in TypeIter{}.
// note this will fetch a sub-FormatFunc for the slice element
// type, and also handle special cases of []byte, []rune slices.
func (fmt *Formatter) iterSliceType(t xunsafe.TypeIter) FormatFunc {
// Get nested element type.
elem := t.Type.Elem()
esz := elem.Size()
// Get nested elem TypeIter{} with flags.
flags := xunsafe.ReflectSliceElemFlags(elem)
et := t.Child(elem, flags)
// Get elem format func.
fn := fmt.loadOrGet(et)
if fn == nil {
panic("unreachable")
}
if !needs_typestr(t) {
return func(s *State) {
ptr := s.P
// Get data as unsafe slice header.
hdr := (*xunsafe.Unsafeheader_Slice)(ptr)
if hdr == nil || hdr.Data == nil {
// Append nil.
appendNil(s)
return
}
// Prepend array brace.
s.B = append(s.B, '[')
if hdr.Len > 0 {
for i := 0; i < hdr.Len; i++ {
// Format at array index.
offset := esz * uintptr(i)
s.P = add(hdr.Data, offset)
fn(s)
// Append separator.
s.B = append(s.B, ',')
}
// Drop final comma.
s.B = s.B[:len(s.B)-1]
}
// Append array brace.
s.B = append(s.B, ']')
}
}
// Slice type string with ptrs / refs.
typestrPtrs := typestr_with_ptrs(t)
typestrRefs := typestr_with_refs(t)
return func(s *State) {
ptr := s.P
// Get data as unsafe slice header.
hdr := (*xunsafe.Unsafeheader_Slice)(ptr)
if hdr == nil || hdr.Data == nil {
// Append nil value with type.
appendNilType(s, typestrPtrs)
return
}
// Open / close braces.
var open, close uint8
open, close = '[', ']'
// Include type info.
if s.A.WithType() {
s.B = append(s.B, typestrRefs...)
open, close = '{', '}'
}
// Prepend array brace.
s.B = append(s.B, open)
if hdr.Len > 0 {
for i := 0; i < hdr.Len; i++ {
// Format at array index.
offset := esz * uintptr(i)
s.P = add(hdr.Data, offset)
fn(s)
// Append separator.
s.B = append(s.B, ',')
}
// Drop final comma.
s.B = s.B[:len(s.B)-1]
}
// Append array brace.
s.B = append(s.B, close)
}
}
func wrapByteSlice(t xunsafe.TypeIter, fn FormatFunc) FormatFunc {
if !needs_typestr(t) {
return func(s *State) {
if s.A.AsText() || s.A.AsQuotedText() || s.A.AsQuotedASCII() {
appendString(s, *(*string)(s.P))
} else {
fn(s)
}
}
}
typestr := typestr_with_ptrs(t)
return func(s *State) {
if s.A.AsText() || s.A.AsQuotedText() || s.A.AsQuotedASCII() {
if s.A.WithType() {
s.B = append(s.B, "("+typestr+")("...)
appendString(s, *(*string)(s.P))
s.B = append(s.B, ")"...)
} else {
appendString(s, *(*string)(s.P))
}
} else {
fn(s)
}
}
}
func wrapRuneSlice(t xunsafe.TypeIter, fn FormatFunc) FormatFunc {
if !needs_typestr(t) {
return func(s *State) {
if s.A.AsText() || s.A.AsQuotedText() || s.A.AsQuotedASCII() {
appendString(s, string(*(*[]rune)(s.P)))
} else {
fn(s)
}
}
}
typestr := typestr_with_ptrs(t)
return func(s *State) {
if s.A.AsText() || s.A.AsQuotedText() || s.A.AsQuotedASCII() {
if s.A.WithType() {
s.B = append(s.B, "("+typestr+")("...)
appendString(s, string(*(*[]rune)(s.P)))
s.B = append(s.B, ")"...)
} else {
appendString(s, string(*(*[]rune)(s.P)))
}
} else {
fn(s)
}
}
}
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