From f453054affd7b85f8c751c4f62b21788ae9d8ceb Mon Sep 17 00:00:00 2001
From: Feoramund <161657516+Feoramund@users.noreply.github.com>
Date: Tue, 27 Aug 2024 18:45:13 -0400
Subject: Return `0, nil` in all `io` cases where an empty slice is provided

---
 core/bytes/buffer.odin | 6 ++++++
 core/bytes/reader.odin | 6 ++++++
 2 files changed, 12 insertions(+)

(limited to 'core/bytes')

diff --git a/core/bytes/buffer.odin b/core/bytes/buffer.odin
index a61f8f00d..f4d883353 100644
--- a/core/bytes/buffer.odin
+++ b/core/bytes/buffer.odin
@@ -144,6 +144,9 @@ buffer_grow :: proc(b: ^Buffer, n: int, loc := #caller_location) {
 }
 
 buffer_write_at :: proc(b: ^Buffer, p: []byte, offset: int, loc := #caller_location) -> (n: int, err: io.Error) {
+	if len(p) == 0 {
+		return 0, nil
+	}
 	b.last_read = .Invalid
 	if offset < 0 {
 		err = .Invalid_Offset
@@ -246,6 +249,9 @@ buffer_read_ptr :: proc(b: ^Buffer, ptr: rawptr, size: int) -> (n: int, err: io.
 }
 
 buffer_read_at :: proc(b: ^Buffer, p: []byte, offset: int) -> (n: int, err: io.Error) {
+	if len(p) == 0 {
+		return 0, nil
+	}
 	b.last_read = .Invalid
 
 	if uint(offset) >= len(b.buf) {
diff --git a/core/bytes/reader.odin b/core/bytes/reader.odin
index d85e4fe13..2e1c5ed42 100644
--- a/core/bytes/reader.odin
+++ b/core/bytes/reader.odin
@@ -34,6 +34,9 @@ reader_size :: proc(r: ^Reader) -> i64 {
 }
 
 reader_read :: proc(r: ^Reader, p: []byte) -> (n: int, err: io.Error) {
+	if len(p) == 0 {
+		return 0, nil
+	}
 	if r.i >= i64(len(r.s)) {
 		return 0, .EOF
 	}
@@ -43,6 +46,9 @@ reader_read :: proc(r: ^Reader, p: []byte) -> (n: int, err: io.Error) {
 	return
 }
 reader_read_at :: proc(r: ^Reader, p: []byte, off: i64) -> (n: int, err: io.Error) {
+	if len(p) == 0 {
+		return 0, nil
+	}
 	if off < 0 {
 		return 0, .Invalid_Offset
 	}
-- 
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