Add utility function for processing a string buffer by line

src/console_cmds.cpp

@@ -39,6 +39,7 @@
 #include "game/game.hpp"
 #include "table/strings.h"
 #include <time.h>
+#include "string_func.h"
 
 #include "safeguards.h"
 
@@ -1080,15 +1081,9 @@ DEF_CONSOLE_CMD(ConRestart)
  */
 static void PrintLineByLine(char *buf)
 {
-	char *p = buf;
-	/* Print output line by line */
-	for (char *p2 = buf; *p2 != '\0'; p2++) {
-		if (*p2 == '\n') {
-			*p2 = '\0';
-			IConsolePrintF(CC_DEFAULT, "%s", p);
-			p = p2 + 1;
-		}
-	}
+	ProcessLineByLine(buf, [&](const char *line) {
+		IConsolePrintF(CC_DEFAULT, "%s", line);
+	});
 }
 
 DEF_CONSOLE_CMD(ConListAILibs)

src/string_func.h

@@ -268,4 +268,20 @@ char *strcasestr(const char *haystack, const char *needle);
 
 int strnatcmp(const char *s1, const char *s2, bool ignore_garbage_at_front = false);
 
+template <typename F>
+inline void ProcessLineByLine(char *buf, F line_functor)
+{
+	char *p = buf;
+	char *p2 = buf;
+	/* Print output line by line */
+	for (; *p2 != '\0'; p2++) {
+		if (*p2 == '\n') {
+			*p2 = '\0';
+			line_functor(p);
+			p = p2 + 1;
+		}
+	}
+	if (p < p2) line_functor(p);
+}
+
 #endif /* STRING_FUNC_H */