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package format
import (
"unsafe"
"codeberg.org/gruf/go-xunsafe"
)
// iterArrayType returns a FormatFunc capable of iterating
// and formatting the given array type currently in TypeIter{}.
// note this will fetch a sub-FormatFunc for the array element
// type, and also handle special cases of [n]byte, [n]rune arrays.
func (fmt *Formatter) iterArrayType(t xunsafe.TypeIter) FormatFunc {
// Array element type.
elem := t.Type.Elem()
// Get nested elem TypeIter with appropriate flags.
flags := xunsafe.ReflectArrayElemFlags(t.Flag, elem)
et := t.Child(elem, flags)
// Get elem format func.
fn := fmt.loadOrGet(et)
if fn == nil {
panic("unreachable")
}
// Handle possible sizes.
switch t.Type.Len() {
case 0:
return emptyArrayType(t)
case 1:
return iterSingleArrayType(t, fn)
default:
return iterMultiArrayType(t, fn)
}
}
func emptyArrayType(t xunsafe.TypeIter) FormatFunc {
if !needs_typestr(t) {
// Simply append empty.
return func(s *State) {
s.B = append(s.B, "[]"...)
}
}
// Array type string with refs.
typestr := typestr_with_refs(t)
// Append empty with type.
return func(s *State) {
if s.A.WithType() {
s.B = append(s.B, typestr...)
s.B = append(s.B, "{}"...)
} else {
s.B = append(s.B, "[]"...)
}
}
}
func iterSingleArrayType(t xunsafe.TypeIter, fn FormatFunc) FormatFunc {
if !needs_typestr(t) {
return func(s *State) {
// Wrap 'fn' in braces.
s.B = append(s.B, '[')
fn(s)
s.B = append(s.B, ']')
}
}
// Array type string with refs.
typestr := typestr_with_refs(t)
// Wrap in type+braces.
return func(s *State) {
// Open / close braces.
var open, close uint8
open, close = '[', ']'
// Include type info.
if s.A.WithType() {
s.B = append(s.B, typestr...)
open, close = '{', '}'
}
// Wrap 'fn' in braces.
s.B = append(s.B, open)
fn(s)
s.B = append(s.B, close)
}
}
func iterMultiArrayType(t xunsafe.TypeIter, fn FormatFunc) FormatFunc {
// Array element in-memory size.
esz := t.Type.Elem().Size()
// Number of elements.
n := t.Type.Len()
if !needs_typestr(t) {
// Wrap elems in braces.
return func(s *State) {
ptr := s.P
// Prepend array brace.
s.B = append(s.B, '[')
for i := 0; i < n; i++ {
// Format at array index.
offset := esz * uintptr(i)
s.P = add(ptr, offset)
fn(s)
// Append separator.
s.B = append(s.B, ',')
}
// Drop final space.
s.B = s.B[:len(s.B)-1]
// Prepend array brace.
s.B = append(s.B, ']')
}
}
// Array type string with refs.
typestr := typestr_with_refs(t)
// Wrap in type+braces.
return func(s *State) {
ptr := s.P
// Open / close braces.
var open, close uint8
open, close = '[', ']'
// Include type info.
if s.A.WithType() {
s.B = append(s.B, typestr...)
open, close = '{', '}'
}
// Prepend array brace.
s.B = append(s.B, open)
for i := 0; i < n; i++ {
// Format at array index.
offset := esz * uintptr(i)
s.P = add(ptr, offset)
fn(s)
// Append separator.
s.B = append(s.B, ',')
}
// Drop final comma.
s.B = s.B[:len(s.B)-1]
// Prepend array brace.
s.B = append(s.B, close)
}
}
func wrapByteArray(t xunsafe.TypeIter, fn FormatFunc) FormatFunc {
n := t.Type.Len()
if !needs_typestr(t) {
return func(s *State) {
if s.A.AsText() || s.A.AsQuotedText() || s.A.AsQuotedASCII() {
var v string
p := (*xunsafe.Unsafeheader_String)(unsafe.Pointer(&v))
p.Len = n
p.Data = s.P
appendString(s, v)
} else {
fn(s)
}
}
}
typestr := typestr_with_ptrs(t)
return func(s *State) {
if s.A.AsText() || s.A.AsQuotedText() || s.A.AsQuotedASCII() {
var v string
p := (*xunsafe.Unsafeheader_String)(unsafe.Pointer(&v))
p.Len = n
p.Data = s.P
if s.A.WithType() {
s.B = append(s.B, "("+typestr+")("...)
appendString(s, v)
s.B = append(s.B, ")"...)
} else {
appendString(s, v)
}
} else {
fn(s)
}
}
}
func wrapRuneArray(t xunsafe.TypeIter, fn FormatFunc) FormatFunc {
n := t.Type.Len()
if !needs_typestr(t) {
return func(s *State) {
if s.A.AsText() || s.A.AsQuotedText() || s.A.AsQuotedASCII() {
var v []rune
p := (*xunsafe.Unsafeheader_Slice)(unsafe.Pointer(&v))
p.Cap = n
p.Len = n
p.Data = s.P
appendString(s, string(v))
} else {
fn(s)
}
}
}
typestr := typestr_with_ptrs(t)
return func(s *State) {
if s.A.AsText() || s.A.AsQuotedText() || s.A.AsQuotedASCII() {
var v []rune
p := (*xunsafe.Unsafeheader_Slice)(unsafe.Pointer(&v))
p.Cap = n
p.Len = n
p.Data = s.P
if s.A.WithType() {
s.B = append(s.B, "("+typestr+")("...)
appendString(s, string(v))
s.B = append(s.B, ")"...)
} else {
appendString(s, string(v))
}
} else {
fn(s)
}
}
}
|
