Allow nullptr with zero length in FileAccess get_buffer

fix #47071

7 files changed, 7 insertions, 7 deletions

diff --git a/core/io/file_access_compressed.cpp b/core/io/file_access_compressed.cpp
index ade4b2c1ac..b2440629e3 100644
--- a/core/io/file_access_compressed.cpp
+++ b/core/io/file_access_compressed.cpp
@@ -286,7 +286,7 @@ uint8_t FileAccessCompressed::get_8() const {
 }
 
 int FileAccessCompressed::get_buffer(uint8_t *p_dst, int p_length) const {
-	ERR_FAIL_COND_V(!p_dst, -1);
+	ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
 	ERR_FAIL_COND_V(p_length < 0, -1);
 	ERR_FAIL_COND_V_MSG(!f, -1, "File must be opened before use.");
 	ERR_FAIL_COND_V_MSG(writing, -1, "File has not been opened in read mode.");
diff --git a/core/io/file_access_encrypted.cpp b/core/io/file_access_encrypted.cpp
index 133ec18762..8ace897f18 100644
--- a/core/io/file_access_encrypted.cpp
+++ b/core/io/file_access_encrypted.cpp
@@ -237,7 +237,7 @@ uint8_t FileAccessEncrypted::get_8() const {
 }
 
 int FileAccessEncrypted::get_buffer(uint8_t *p_dst, int p_length) const {
-	ERR_FAIL_COND_V(!p_dst, -1);
+	ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
 	ERR_FAIL_COND_V(p_length < 0, -1);
 	ERR_FAIL_COND_V_MSG(writing, -1, "File has not been opened in read mode.");
 
diff --git a/core/io/file_access_memory.cpp b/core/io/file_access_memory.cpp
index 4bab8c1d3d..58670d5246 100644
--- a/core/io/file_access_memory.cpp
+++ b/core/io/file_access_memory.cpp
@@ -138,7 +138,7 @@ uint8_t FileAccessMemory::get_8() const {
 }
 
 int FileAccessMemory::get_buffer(uint8_t *p_dst, int p_length) const {
-	ERR_FAIL_COND_V(!p_dst, -1);
+	ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
 	ERR_FAIL_COND_V(p_length < 0, -1);
 	ERR_FAIL_COND_V(!data, -1);
 
diff --git a/core/io/file_access_network.cpp b/core/io/file_access_network.cpp
index e09c3552ef..31b7d658d0 100644
--- a/core/io/file_access_network.cpp
+++ b/core/io/file_access_network.cpp
@@ -366,7 +366,7 @@ void FileAccessNetwork::_queue_page(int p_page) const {
 }
 
 int FileAccessNetwork::get_buffer(uint8_t *p_dst, int p_length) const {
-	ERR_FAIL_COND_V(!p_dst, -1);
+	ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
 	ERR_FAIL_COND_V(p_length < 0, -1);
 
 	//bool eof=false;
diff --git a/core/io/file_access_pack.cpp b/core/io/file_access_pack.cpp
index 17d54e5cb6..e24dc40166 100644
--- a/core/io/file_access_pack.cpp
+++ b/core/io/file_access_pack.cpp
@@ -299,7 +299,7 @@ uint8_t FileAccessPack::get_8() const {
 }
 
 int FileAccessPack::get_buffer(uint8_t *p_dst, int p_length) const {
-	ERR_FAIL_COND_V(!p_dst, -1);
+	ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
 	ERR_FAIL_COND_V(p_length < 0, -1);
 
 	if (eof) {
diff --git a/core/io/file_access_zip.cpp b/core/io/file_access_zip.cpp
index 5364125abb..586c988974 100644
--- a/core/io/file_access_zip.cpp
+++ b/core/io/file_access_zip.cpp
@@ -303,7 +303,7 @@ uint8_t FileAccessZip::get_8() const {
 }
 
 int FileAccessZip::get_buffer(uint8_t *p_dst, int p_length) const {
-	ERR_FAIL_COND_V(!p_dst, -1);
+	ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
 	ERR_FAIL_COND_V(p_length < 0, -1);
 	ERR_FAIL_COND_V(!zfile, -1);
 	at_eof = unzeof(zfile);
diff --git a/core/os/file_access.cpp b/core/os/file_access.cpp
index e3a84732dc..ad234c2d49 100644
--- a/core/os/file_access.cpp
+++ b/core/os/file_access.cpp
@@ -368,7 +368,7 @@ Vector<String> FileAccess::get_csv_line(const String &p_delim) const {
 }
 
 int FileAccess::get_buffer(uint8_t *p_dst, int p_length) const {
-	ERR_FAIL_COND_V(!p_dst, -1);
+	ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
 	ERR_FAIL_COND_V(p_length < 0, -1);
 	int i = 0;
 	for (i = 0; i < p_length && !eof_reached(); i++) {