From bc85f5bebfdc3637f971d8dac2927940c7f83877 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <thinkyhead@users.noreply.github.com>
Date: Sun, 6 Apr 2025 13:48:01 -0500
Subject: [PATCH] =?UTF-8?q?=F0=9F=A7=91=E2=80=8D=F0=9F=92=BB=20Add=20Parse?=
 =?UTF-8?q?r::has=5Fstring?=
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---
 Marlin/src/gcode/config/M550.cpp                     | 2 +-
 Marlin/src/gcode/control/T.cpp                       | 2 +-
 Marlin/src/gcode/lcd/M117.cpp                        | 2 +-
 Marlin/src/gcode/parser.h                            | 2 ++
 Marlin/src/gcode/stats/M75-M78.cpp                   | 2 +-
 Marlin/src/lcd/extui/ia_creality/ia_creality_rts.cpp | 2 +-
 6 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/Marlin/src/gcode/config/M550.cpp b/Marlin/src/gcode/config/M550.cpp
index 6ff0c506de..88712786da 100644
--- a/Marlin/src/gcode/config/M550.cpp
+++ b/Marlin/src/gcode/config/M550.cpp
@@ -42,7 +42,7 @@ void GcodeSuite::M550() {
     machine_name = parser.value_string();
   else if (TERN(GCODE_QUOTED_STRINGS, false, parser.seen('P')))
     machine_name = parser.string_arg[0] == 'P' ? &parser.string_arg[1] : parser.string_arg;
-  else if (parser.string_arg && parser.string_arg[0])
+  else if (parser.has_string())
     machine_name = parser.string_arg;
   else
     did_set = false;
diff --git a/Marlin/src/gcode/control/T.cpp b/Marlin/src/gcode/control/T.cpp
index 9f6fb2bb00..ce6428950e 100644
--- a/Marlin/src/gcode/control/T.cpp
+++ b/Marlin/src/gcode/control/T.cpp
@@ -69,7 +69,7 @@ void GcodeSuite::T(const int8_t tool_index) {
   reset_stepper_timeout();
 
   #if HAS_PRUSA_MMU3
-    if (parser.string_arg) {
+    if (parser.has_string()) {
       mmu3.tool_change(parser.string_arg[0], uint8_t(tool_index));   // Special commands T?/Tx/Tc
       return;
     }
diff --git a/Marlin/src/gcode/lcd/M117.cpp b/Marlin/src/gcode/lcd/M117.cpp
index 57a26851fd..e8b9cc46f6 100644
--- a/Marlin/src/gcode/lcd/M117.cpp
+++ b/Marlin/src/gcode/lcd/M117.cpp
@@ -32,7 +32,7 @@
  */
 void GcodeSuite::M117() {
 
-  if (parser.string_arg && parser.string_arg[0])
+  if (parser.has_string())
     ui.set_status_no_expire(parser.string_arg);
   else
     ui.reset_status();
diff --git a/Marlin/src/gcode/parser.h b/Marlin/src/gcode/parser.h
index 401548b309..e56a723087 100644
--- a/Marlin/src/gcode/parser.h
+++ b/Marlin/src/gcode/parser.h
@@ -97,6 +97,8 @@ public:
     FORCE_INLINE static void cancel_motion_mode() { motion_mode_codenum = -1; }
   #endif
 
+  FORCE_INLINE static bool has_string() { return string_arg && string_arg[0]; }
+
   #if ENABLED(DEBUG_GCODE_PARSER)
     static void debug();
   #endif
diff --git a/Marlin/src/gcode/stats/M75-M78.cpp b/Marlin/src/gcode/stats/M75-M78.cpp
index 03e76d531d..8ab94577ef 100644
--- a/Marlin/src/gcode/stats/M75-M78.cpp
+++ b/Marlin/src/gcode/stats/M75-M78.cpp
@@ -43,7 +43,7 @@ void GcodeSuite::M75() {
   startOrResumeJob(); // ... ExtUI::onPrintTimerStarted()
   #if ENABLED(DWIN_LCD_PROUI)
     // TODO: Remove if M75 <string> is never used
-    if (!IS_SD_PRINTING()) dwinPrintHeader(parser.string_arg && parser.string_arg[0] ? parser.string_arg : GET_TEXT(MSG_HOST_START_PRINT));
+    if (!IS_SD_PRINTING()) dwinPrintHeader(parser.has_string() ? parser.string_arg : GET_TEXT(MSG_HOST_START_PRINT));
   #endif
 }
 
diff --git a/Marlin/src/lcd/extui/ia_creality/ia_creality_rts.cpp b/Marlin/src/lcd/extui/ia_creality/ia_creality_rts.cpp
index 660d7faed7..8fb672931d 100644
--- a/Marlin/src/lcd/extui/ia_creality/ia_creality_rts.cpp
+++ b/Marlin/src/lcd/extui/ia_creality/ia_creality_rts.cpp
@@ -100,7 +100,7 @@ void RTS::onStartup() {
   delay_ms(400); // Delay to allow screen to configure
 
   #if ENABLED(CONFIGURABLE_MACHINE_NAME)
-    const MString<32> ready(message_string, " Ready");
+    const MString<32> ready(machine_name, " Ready");
     onStatusChanged(ready);
   #else
     onStatusChanged(F(MACHINE_NAME " Ready"));