Replace last occurrences of 'ERR_EXPLAIN' with 'ERR_FAIL_*_MSG'

The last remaining ERR_EXPLAIN call is in FreeType code and makes sense as is
(conditionally defines the error message).

There are a few ERR_EXPLAINC calls for C-strings where String is not included
which can stay as is to avoid adding additional _MSGC macros just for that.

Part of #31244.

8 files changed, 34 insertions, 44 deletions

diff --git a/modules/etc/texture_loader_pkm.cpp b/modules/etc/texture_loader_pkm.cpp
index 3337460dfc..dd61d816d4 100644
--- a/modules/etc/texture_loader_pkm.cpp
+++ b/modules/etc/texture_loader_pkm.cpp
@@ -62,10 +62,8 @@ RES ResourceFormatPKM::load(const String &p_path, const String &p_original_path,
 	f->set_endian_swap(true);
 
 	ETC1Header h;
-	ERR_EXPLAIN("Invalid or Unsupported PKM texture file: " + p_path);
 	f->get_buffer((uint8_t *)&h.tag, sizeof(h.tag));
-	if (strncmp(h.tag, "PKM 10", sizeof(h.tag)))
-		ERR_FAIL_V(RES());
+	ERR_FAIL_COND_V_MSG(strncmp(h.tag, "PKM 10", sizeof(h.tag)), RES(), "Invalid or unsupported PKM texture file: " + p_path + ".");
 
 	h.format = f->get_16();
 	h.texWidth = f->get_16();
diff --git a/modules/gdscript/gdscript_editor.cpp b/modules/gdscript/gdscript_editor.cpp
index 9f65a9fff1..7c01e85ff7 100644
--- a/modules/gdscript/gdscript_editor.cpp
+++ b/modules/gdscript/gdscript_editor.cpp
@@ -634,7 +634,7 @@ static GDScriptCompletionIdentifier _type_from_gdtype(const GDScriptDataType &p_
 
 	switch (p_gdtype.kind) {
 		case GDScriptDataType::UNINITIALIZED: {
-			ERR_EXPLAIN("Uninitialized completion. Please report a bug.");
+			ERR_PRINT("Uninitialized completion. Please report a bug.");
 		} break;
 		case GDScriptDataType::BUILTIN: {
 			ci.type.kind = GDScriptParser::DataType::BUILTIN;
diff --git a/modules/gdscript/gdscript_parser.cpp b/modules/gdscript/gdscript_parser.cpp
index 9a25e788c7..764f57aaa1 100644
--- a/modules/gdscript/gdscript_parser.cpp
+++ b/modules/gdscript/gdscript_parser.cpp
@@ -5761,7 +5761,7 @@ GDScriptParser::DataType GDScriptParser::_type_from_gdtype(const GDScriptDataTyp
 
 	switch (p_gdtype.kind) {
 		case GDScriptDataType::UNINITIALIZED: {
-			ERR_EXPLAIN("Uninitialized datatype. Please report a bug.");
+			ERR_PRINT("Uninitialized datatype. Please report a bug.");
 		} break;
 		case GDScriptDataType::BUILTIN: {
 			result.kind = DataType::BUILTIN;
diff --git a/modules/hdr/image_loader_hdr.cpp b/modules/hdr/image_loader_hdr.cpp
index e610619b54..1abf26bfee 100644
--- a/modules/hdr/image_loader_hdr.cpp
+++ b/modules/hdr/image_loader_hdr.cpp
@@ -37,7 +37,7 @@ Error ImageLoaderHDR::load_image(Ref<Image> p_image, FileAccess *f, bool p_force
 
 	String header = f->get_token();
 
-	ERR_FAIL_COND_V(header != "#?RADIANCE" && header != "#?RGBE", ERR_FILE_UNRECOGNIZED);
+	ERR_FAIL_COND_V_MSG(header != "#?RADIANCE" && header != "#?RGBE", ERR_FILE_UNRECOGNIZED, "Unsupported header information in HDR: " + header + ".");
 
 	while (true) {
 		String line = f->get_line();
@@ -45,12 +45,9 @@ Error ImageLoaderHDR::load_image(Ref<Image> p_image, FileAccess *f, bool p_force
 		if (line == "") // empty line indicates end of header
 			break;
 		if (line.begins_with("FORMAT=")) { // leave option to implement other commands
-			if (line != "FORMAT=32-bit_rle_rgbe") {
-				ERR_EXPLAIN("Only 32-bit_rle_rgbe is supported for HDR files.");
-				return ERR_FILE_UNRECOGNIZED;
-			}
+			ERR_FAIL_COND_V_MSG(line != "FORMAT=32-bit_rle_rgbe", ERR_FILE_UNRECOGNIZED, "Only 32-bit_rle_rgbe is supported for HDR files.");
 		} else if (!line.begins_with("#")) { // not comment
-			WARN_PRINTS("Ignoring unsupported header information in HDR : " + line);
+			WARN_PRINTS("Ignoring unsupported header information in HDR: " + line + ".");
 		}
 	}
 
diff --git a/modules/webp/image_loader_webp.cpp b/modules/webp/image_loader_webp.cpp
index 8986e49cf0..d1bfa20842 100644
--- a/modules/webp/image_loader_webp.cpp
+++ b/modules/webp/image_loader_webp.cpp
@@ -106,8 +106,7 @@ static Ref<Image> _webp_lossy_unpack(const PoolVector<uint8_t> &p_buffer) {
 		errdec = WebPDecodeRGBInto(&r[4], size, dst_w.ptr(), datasize, 3 * features.width) == NULL;
 	}
 
-	//ERR_EXPLAIN("Error decoding webp! - "+p_file);
-	ERR_FAIL_COND_V(errdec, Ref<Image>());
+	ERR_FAIL_COND_V_MSG(errdec, Ref<Image>(), "Failed decoding WebP image.");
 
 	dst_w.release();
 
@@ -121,7 +120,6 @@ Error webp_load_image_from_buffer(Image *p_image, const uint8_t *p_buffer, int p
 
 	WebPBitstreamFeatures features;
 	if (WebPGetFeatures(p_buffer, p_buffer_len, &features) != VP8_STATUS_OK) {
-		// ERR_EXPLAIN("Error decoding WEBP image");
 		ERR_FAIL_V(ERR_FILE_CORRUPT);
 	}
 
@@ -138,8 +136,7 @@ Error webp_load_image_from_buffer(Image *p_image, const uint8_t *p_buffer, int p
 	}
 	dst_w.release();
 
-	//ERR_EXPLAIN("Error decoding webp!");
-	ERR_FAIL_COND_V(errdec, ERR_FILE_CORRUPT);
+	ERR_FAIL_COND_V_MSG(errdec, ERR_FILE_CORRUPT, "Failed decoding WebP image.");
 
 	p_image->create(features.width, features.height, 0, features.has_alpha ? Image::FORMAT_RGBA8 : Image::FORMAT_RGB8, dst_image);
 
diff --git a/modules/websocket/wsl_client.cpp b/modules/websocket/wsl_client.cpp
index cf2ad55b4a..0006a057e0 100644
--- a/modules/websocket/wsl_client.cpp
+++ b/modules/websocket/wsl_client.cpp
@@ -121,17 +121,17 @@ bool WSLClient::_verify_headers(String &r_protocol) {
 			headers[name] = value;
 	}
 
-#define _WLS_EXPLAIN(NAME, VALUE) \
-	ERR_EXPLAIN("Missing or invalid header '" + String(NAME) + "'. Expected value '" + VALUE + "'");
-#define _WLS_CHECK(NAME, VALUE) \
-	_WLS_EXPLAIN(NAME, VALUE);  \
-	ERR_FAIL_COND_V(!headers.has(NAME) || headers[NAME].to_lower() != VALUE, false);
-#define _WLS_CHECK_NC(NAME, VALUE) \
-	_WLS_EXPLAIN(NAME, VALUE);     \
-	ERR_FAIL_COND_V(!headers.has(NAME) || headers[NAME] != VALUE, false);
-	_WLS_CHECK("connection", "upgrade");
-	_WLS_CHECK("upgrade", "websocket");
-	_WLS_CHECK_NC("sec-websocket-accept", WSLPeer::compute_key_response(_key));
+#define _WSL_CHECK(NAME, VALUE)                                                         \
+	ERR_FAIL_COND_V_MSG(!headers.has(NAME) || headers[NAME].to_lower() != VALUE, false, \
+			"Missing or invalid header '" + String(NAME) + "'. Expected value '" + VALUE + "'.");
+#define _WSL_CHECK_NC(NAME, VALUE)                                           \
+	ERR_FAIL_COND_V_MSG(!headers.has(NAME) || headers[NAME] != VALUE, false, \
+			"Missing or invalid header '" + String(NAME) + "'. Expected value '" + VALUE + "'.");
+	_WSL_CHECK("connection", "upgrade");
+	_WSL_CHECK("upgrade", "websocket");
+	_WSL_CHECK_NC("sec-websocket-accept", WSLPeer::compute_key_response(_key));
+#undef _WSL_CHECK_NC
+#undef _WSL_CHECK
 	if (_protocols.size() == 0) {
 		// We didn't request a custom protocol
 		ERR_FAIL_COND_V(headers.has("sec-websocket-protocol"), false);
@@ -148,10 +148,6 @@ bool WSLClient::_verify_headers(String &r_protocol) {
 		if (!valid)
 			return false;
 	}
-#undef _WLS_CHECK_NC
-#undef _WLS_CHECK
-#undef _WLS_EXPLAIN
-
 	return true;
 }
 
diff --git a/modules/websocket/wsl_server.cpp b/modules/websocket/wsl_server.cpp
index 1feae420b9..efb526eed1 100644
--- a/modules/websocket/wsl_server.cpp
+++ b/modules/websocket/wsl_server.cpp
@@ -1,5 +1,5 @@
 /*************************************************************************/
-/*  lws_server.cpp                                                       */
+/*  wsl_server.cpp                                                       */
 /*************************************************************************/
 /*                       This file is part of:                           */
 /*                           GODOT ENGINE                                */
@@ -64,18 +64,17 @@ bool WSLServer::PendingPeer::_parse_request(const PoolStringArray p_protocols) {
 		else
 			headers[name] = value;
 	}
-#define _WLS_CHECK(NAME, VALUE)                                                                      \
-	ERR_EXPLAIN("Missing or invalid header '" + String(NAME) + "'. Expected value '" + VALUE + "'"); \
-	ERR_FAIL_COND_V(!headers.has(NAME) || headers[NAME].to_lower() != VALUE, false);
-#define _WLS_CHECK_EX(NAME)                                \
-	ERR_EXPLAIN("Missing header '" + String(NAME) + "'."); \
-	ERR_FAIL_COND_V(!headers.has(NAME), false);
-	_WLS_CHECK("upgrade", "websocket");
-	_WLS_CHECK("sec-websocket-version", "13");
-	_WLS_CHECK_EX("sec-websocket-key");
-	_WLS_CHECK_EX("connection");
-#undef _WLS_CHECK_EX
-#undef _WLS_CHECK
+#define _WSL_CHECK(NAME, VALUE)                                                         \
+	ERR_FAIL_COND_V_MSG(!headers.has(NAME) || headers[NAME].to_lower() != VALUE, false, \
+			"Missing or invalid header '" + String(NAME) + "'. Expected value '" + VALUE + "'.");
+#define _WSL_CHECK_EX(NAME) \
+	ERR_FAIL_COND_V_MSG(!headers.has(NAME), false, "Missing header '" + String(NAME) + "'.");
+	_WSL_CHECK("upgrade", "websocket");
+	_WSL_CHECK("sec-websocket-version", "13");
+	_WSL_CHECK_EX("sec-websocket-key");
+	_WSL_CHECK_EX("connection");
+#undef _WSL_CHECK_EX
+#undef _WSL_CHECK
 	key = headers["sec-websocket-key"];
 	if (headers.has("sec-websocket-protocol")) {
 		Vector<String> protos = headers["sec-websocket-protocol"].split(",");
diff --git a/modules/xatlas_unwrap/register_types.cpp b/modules/xatlas_unwrap/register_types.cpp
index c18aa04336..04911301ff 100644
--- a/modules/xatlas_unwrap/register_types.cpp
+++ b/modules/xatlas_unwrap/register_types.cpp
@@ -29,11 +29,14 @@
 /*************************************************************************/
 
 #include "register_types.h"
+
 #include "core/error_macros.h"
+
 #include "thirdparty/xatlas/xatlas.h"
 
 #include <stdio.h>
 #include <stdlib.h>
+
 extern bool (*array_mesh_lightmap_unwrap_callback)(float p_texel_size, const float *p_vertices, const float *p_normals, int p_vertex_count, const int *p_indices, const int *p_face_materials, int p_index_count, float **r_uv, int **r_vertex, int *r_vertex_count, int **r_index, int *r_index_count, int *r_size_hint_x, int *r_size_hint_y);
 
 bool xatlas_mesh_lightmap_unwrap_callback(float p_texel_size, const float *p_vertices, const float *p_normals, int p_vertex_count, const int *p_indices, const int *p_face_materials, int p_index_count, float **r_uv, int **r_vertex, int *r_vertex_count, int **r_index, int *r_index_count, int *r_size_hint_x, int *r_size_hint_y) {