gdb: Convert language la_printstr field to a method

This commit changes the language_data::la_printstr function pointer
member variable into a member function of language_defn.

There should be no user visible changes after this commit.

gdb/ChangeLog:

	* ada-lang.c (ada_language_data): Delete la_printstr initializer.
	(ada_language::printstr): New member function.
	* c-lang.c (c_language_data): Delete la_printstr initializer.
	(cplus_language_data): Likewise.
	(asm_language_data): Likewise.
	(minimal_language_data): Likewise.
	* d-lang.c (d_language_data): Likewise.
	* f-lang.c (f_printstr): Rename to f_language::printstr.
	(f_language_data): Delete la_printstr initializer.
	(f_language::printstr): New member function, implementation from
	f_printstr.
	* go-lang.c (go_language_data): Delete la_printstr initializer.
	* language.c (language_defn::printstr): Define new member
	function.
	(unk_lang_printstr): Delete.
	(unknown_language_data): Delete la_printstr initializer.
	(unknown_language::printstr): New member function.
	(auto_language_data): Delete la_printstr initializer.
	(auto_language::printstr): New member function.
	* language.h (language_data): Delete la_printstr field.
	(language_defn::printstr): Declare new member function.
	(LA_PRINT_STRING): Update call to printstr.
	* m2-lang.c (m2_printstr): Rename to m2_language::printstr.
	(m2_language_data): Delete la_printstr initializer.
	(m2_language::printstr): New member function, implementation from
	m2_printstr.
	* objc-lang.c (objc_language_data): Delete la_printstr
	initializer.
	* opencl-lang.c (opencl_language_data): Likewise.
	* p-lang.c (pascal_printstr): Rename to pascal_language::printstr.
	(pascal_language_data): Delete la_printstr initializer.
	(pascal_language::printstr): New member function, implementation
	from pascal_printstr.
	* p-lang.h (pascal_printstr): Delete declaration.
	* rust-lang.c (rust_printstr): Update header comment.
	(rust_language_data): Delete la_printstr initializer.
	(rust_language::printstr): New member function.

gdb/ChangeLog

@@ -1,3 +1,43 @@
+2020-06-23  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* ada-lang.c (ada_language_data): Delete la_printstr initializer.
+	(ada_language::printstr): New member function.
+	* c-lang.c (c_language_data): Delete la_printstr initializer.
+	(cplus_language_data): Likewise.
+	(asm_language_data): Likewise.
+	(minimal_language_data): Likewise.
+	* d-lang.c (d_language_data): Likewise.
+	* f-lang.c (f_printstr): Rename to f_language::printstr.
+	(f_language_data): Delete la_printstr initializer.
+	(f_language::printstr): New member function, implementation from
+	f_printstr.
+	* go-lang.c (go_language_data): Delete la_printstr initializer.
+	* language.c (language_defn::printstr): Define new member
+	function.
+	(unk_lang_printstr): Delete.
+	(unknown_language_data): Delete la_printstr initializer.
+	(unknown_language::printstr): New member function.
+	(auto_language_data): Delete la_printstr initializer.
+	(auto_language::printstr): New member function.
+	* language.h (language_data): Delete la_printstr field.
+	(language_defn::printstr): Declare new member function.
+	(LA_PRINT_STRING): Update call to printstr.
+	* m2-lang.c (m2_printstr): Rename to m2_language::printstr.
+	(m2_language_data): Delete la_printstr initializer.
+	(m2_language::printstr): New member function, implementation from
+	m2_printstr.
+	* objc-lang.c (objc_language_data): Delete la_printstr
+	initializer.
+	* opencl-lang.c (opencl_language_data): Likewise.
+	* p-lang.c (pascal_printstr): Rename to pascal_language::printstr.
+	(pascal_language_data): Delete la_printstr initializer.
+	(pascal_language::printstr): New member function, implementation
+	from pascal_printstr.
+	* p-lang.h (pascal_printstr): Delete declaration.
+	* rust-lang.c (rust_printstr): Update header comment.
+	(rust_language_data): Delete la_printstr initializer.
+	(rust_language::printstr): New member function.
+
 2020-06-23  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* ada-lang.c (ada_language_data): Delete la_printchar initializer.

gdb/ada-lang.c

@@ -13681,7 +13681,6 @@ extern const struct language_data ada_language_data =
   macro_expansion_no,
   ada_extensions,
   &ada_exp_descriptor,
-  ada_printstr,                 /* Function to print string constant */
   ada_print_typedef,            /* Print a typedef using appropriate syntax */
   NULL,                         /* name_of_this */
   true,                         /* la_store_sym_names_in_linkage_form_p */
@@ -14122,6 +14121,17 @@ public:
     ada_printchar (ch, chtype, stream);
   }
 
+  /* See language.h.  */
+
+  void printstr (struct ui_file *stream, struct type *elttype,
+		 const gdb_byte *string, unsigned int length,
+		 const char *encoding, int force_ellipses,
+		 const struct value_print_options *options) const override
+  {
+    ada_printstr (stream, elttype, string, length, encoding,
+		  force_ellipses, options);
+  }
+
 protected:
   /* See language.h.  */
 

gdb/c-lang.c

@@ -889,7 +889,6 @@ extern const struct language_data c_language_data =
   macro_expansion_c,
   c_extensions,
   &exp_descriptor_c,
-  c_printstr,			/* Function to print string constant */
   c_print_typedef,		/* Print a typedef using appropriate syntax */
   NULL,				/* name_of_this */
   true,				/* la_store_sym_names_in_linkage_form_p */
@@ -993,7 +992,6 @@ extern const struct language_data cplus_language_data =
   macro_expansion_c,
   cplus_extensions,
   &exp_descriptor_c,
-  c_printstr,			/* Function to print string constant */
   c_print_typedef,		/* Print a typedef using appropriate syntax */
   "this",                       /* name_of_this */
   false,			/* la_store_sym_names_in_linkage_form_p */
@@ -1194,7 +1192,6 @@ extern const struct language_data asm_language_data =
   macro_expansion_c,
   asm_extensions,
   &exp_descriptor_c,
-  c_printstr,			/* Function to print string constant */
   c_print_typedef,		/* Print a typedef using appropriate syntax */
   NULL,				/* name_of_this */
   true,				/* la_store_sym_names_in_linkage_form_p */
@@ -1253,7 +1250,6 @@ extern const struct language_data minimal_language_data =
   macro_expansion_c,
   NULL,
   &exp_descriptor_c,
-  c_printstr,			/* Function to print string constant */
   c_print_typedef,		/* Print a typedef using appropriate syntax */
   NULL,				/* name_of_this */
   true,				/* la_store_sym_names_in_linkage_form_p */

gdb/d-lang.c

@@ -142,7 +142,6 @@ extern const struct language_data d_language_data =
   macro_expansion_no,
   d_extensions,
   &exp_descriptor_c,
-  c_printstr,			/* Function to print string constant.  */
   c_print_typedef,		/* Print a typedef using appropriate
 				   syntax.  */
   "this",

gdb/f-lang.c

@@ -68,29 +68,6 @@ f_get_encoding (struct type *type)
   return encoding;
 }
 
-/* Print the character string STRING, printing at most LENGTH characters.
-   Printing stops early if the number hits print_max; repeat counts
-   are printed as appropriate.  Print ellipses at the end if we
-   had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
-   FIXME:  This is a copy of the same function from c-exp.y.  It should
-   be replaced with a true F77 version.  */
-
-static void
-f_printstr (struct ui_file *stream, struct type *type, const gdb_byte *string,
-	    unsigned int length, const char *encoding, int force_ellipses,
-	    const struct value_print_options *options)
-{
-  const char *type_encoding = f_get_encoding (type);
-
-  if (TYPE_LENGTH (type) == 4)
-    fputs_filtered ("4_", stream);
-
-  if (!encoding || !*encoding)
-    encoding = type_encoding;
-
-  generic_printstr (stream, type, string, length, encoding,
-		    force_ellipses, '\'', 0, options);
-}
 
 
 /* Table of operators and their precedences for printing expressions.  */
@@ -536,7 +513,6 @@ extern const struct language_data f_language_data =
   macro_expansion_no,
   f_extensions,
   &exp_descriptor_f,
-  f_printstr,			/* function to print string constant */
   f_print_typedef,		/* Print a typedef using appropriate syntax */
   NULL,                    	/* name_of_this */
   false,			/* la_store_sym_names_in_linkage_form_p */
@@ -707,6 +683,25 @@ public:
     fputs_filtered ("'", stream);
   }
 
+  /* See language.h.  */
+
+  void printstr (struct ui_file *stream, struct type *elttype,
+		 const gdb_byte *string, unsigned int length,
+		 const char *encoding, int force_ellipses,
+		 const struct value_print_options *options) const override
+  {
+    const char *type_encoding = f_get_encoding (elttype);
+
+    if (TYPE_LENGTH (elttype) == 4)
+      fputs_filtered ("4_", stream);
+
+    if (!encoding || !*encoding)
+      encoding = type_encoding;
+
+    generic_printstr (stream, elttype, string, length, encoding,
+		      force_ellipses, '\'', 0, options);
+  }
+
 protected:
 
   /* See language.h.  */

gdb/go-lang.c

@@ -527,7 +527,6 @@ extern const struct language_data go_language_data =
   macro_expansion_no,
   NULL,
   &exp_descriptor_c,
-  c_printstr,			/* Function to print string constant.  */
   c_print_typedef,		/* Print a typedef using appropriate
 				   syntax.  */
   NULL,				/* name_of_this */

gdb/language.c

@@ -669,6 +669,18 @@ language_defn::printchar (int ch, struct type *chtype,
   c_printchar (ch, chtype, stream);
 }
 
+/* See language.h.  */
+
+void
+language_defn::printstr (struct ui_file *stream, struct type *elttype,
+			 const gdb_byte *string, unsigned int length,
+			 const char *encoding, int force_ellipses,
+			 const struct value_print_options *options) const
+{
+  c_printstr (stream, elttype, string, length, encoding, force_ellipses,
+	      options);
+}
+
 /* The default implementation of the get_symbol_name_matcher_inner method
    from the language_defn class.  Matches with strncmp_iw.  */
 
@@ -734,16 +746,6 @@ default_is_string_type_p (struct type *type)
   return (type->code ()  == TYPE_CODE_STRING);
 }
 
-static void
-unk_lang_printstr (struct ui_file *stream, struct type *type,
-		   const gdb_byte *string, unsigned int length,
-		   const char *encoding, int force_ellipses,
-		   const struct value_print_options *options)
-{
-  error (_("internal error - unimplemented "
-	   "function unk_lang_printstr called."));
-}
-
 static const struct op_print unk_op_print_tab[] =
 {
   {NULL, OP_NULL, PREC_NULL, 0}
@@ -772,7 +774,6 @@ extern const struct language_data unknown_language_data =
   macro_expansion_no,
   NULL,
   &exp_descriptor_standard,
-  unk_lang_printstr,
   default_print_typedef,	/* Print a typedef using appropriate syntax */
   "this",        	    	/* name_of_this */
   true,				/* store_sym_names_in_linkage_form_p */
@@ -857,6 +858,16 @@ public:
   {
     error (_("unimplemented unknown_language::printchar called"));
   }
+
+  /* See language.h.  */
+
+  void printstr (struct ui_file *stream, struct type *elttype,
+		 const gdb_byte *string, unsigned int length,
+		 const char *encoding, int force_ellipses,
+		 const struct value_print_options *options) const override
+  {
+    error (_("unimplemented unknown_language::printstr called"));
+  }
 };
 
 /* Single instance of the unknown language class.  */
@@ -876,7 +887,6 @@ extern const struct language_data auto_language_data =
   macro_expansion_no,
   NULL,
   &exp_descriptor_standard,
-  unk_lang_printstr,
   default_print_typedef,	/* Print a typedef using appropriate syntax */
   "this",		        /* name_of_this */
   false,			/* store_sym_names_in_linkage_form_p */
@@ -961,6 +971,16 @@ public:
   {
     error (_("unimplemented auto_language::printchar called"));
   }
+
+  /* See language.h.  */
+
+  void printstr (struct ui_file *stream, struct type *elttype,
+		 const gdb_byte *string, unsigned int length,
+		 const char *encoding, int force_ellipses,
+		 const struct value_print_options *options) const override
+  {
+    error (_("unimplemented auto_language::printstr called"));
+  }
 };
 
 /* Single instance of the fake "auto" language.  */

gdb/language.h

@@ -225,11 +225,6 @@ struct language_data
 
     const struct exp_descriptor *la_exp_desc;
 
-    void (*la_printstr) (struct ui_file * stream, struct type *elttype,
-			 const gdb_byte *string, unsigned int length,
-			 const char *encoding, int force_ellipses,
-			 const struct value_print_options *);
-
     /* Print a typedef using syntax appropriate for this language.
        TYPE is the underlying type.  NEW_SYMBOL is the symbol naming
        the type.  STREAM is the output stream on which to print.  */
@@ -547,6 +542,16 @@ struct language_defn : language_data
   virtual void printchar (int ch, struct type *chtype,
 			  struct ui_file * stream) const;
 
+/* Print the character string STRING, printing at most LENGTH characters.
+   Printing stops early if the number hits print_max; repeat counts
+   are printed as appropriate.  Print ellipses at the end if we
+   had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.  */
+
+  virtual void printstr (struct ui_file *stream, struct type *elttype,
+			 const gdb_byte *string, unsigned int length,
+			 const char *encoding, int force_ellipses,
+			 const struct value_print_options *options) const;
+
 protected:
 
   /* This is the overridable part of the GET_SYMBOL_NAME_MATCHER method.
@@ -651,8 +656,8 @@ extern enum language set_language (enum language);
 #define LA_PRINT_CHAR(ch, type, stream) \
   (current_language->printchar (ch, type, stream))
 #define LA_PRINT_STRING(stream, elttype, string, length, encoding, force_ellipses, options) \
-  (current_language->la_printstr(stream, elttype, string, length, \
+  (current_language->printstr (stream, elttype, string, length, \
-				 encoding, force_ellipses,options))
+			       encoding, force_ellipses,options))
 #define LA_EMIT_CHAR(ch, type, stream, quoter) \
   (current_language->emitchar (ch, type, stream, quoter))
 

gdb/m2-lang.c

@@ -42,86 +42,6 @@ m2_printchar (int c, struct type *type, struct ui_file *stream)
   fputs_filtered ("'", stream);
 }
 
-/* Print the character string STRING, printing at most LENGTH characters.
-   Printing stops early if the number hits print_max; repeat counts
-   are printed as appropriate.  Print ellipses at the end if we
-   had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
-   FIXME:  This is a copy of the same function from c-exp.y.  It should
-   be replaced with a true Modula version.  */
-
-static void
-m2_printstr (struct ui_file *stream, struct type *type, const gdb_byte *string,
-	     unsigned int length, const char *encoding, int force_ellipses,
-	     const struct value_print_options *options)
-{
-  unsigned int i;
-  unsigned int things_printed = 0;
-  int in_quotes = 0;
-  int need_comma = 0;
-
-  if (length == 0)
-    {
-      fputs_filtered ("\"\"", gdb_stdout);
-      return;
-    }
-
-  for (i = 0; i < length && things_printed < options->print_max; ++i)
-    {
-      /* Position of the character we are examining
-         to see whether it is repeated.  */
-      unsigned int rep1;
-      /* Number of repetitions we have detected so far.  */
-      unsigned int reps;
-
-      QUIT;
-
-      if (need_comma)
-	{
-	  fputs_filtered (", ", stream);
-	  need_comma = 0;
-	}
-
-      rep1 = i + 1;
-      reps = 1;
-      while (rep1 < length && string[rep1] == string[i])
-	{
-	  ++rep1;
-	  ++reps;
-	}
-
-      if (reps > options->repeat_count_threshold)
-	{
-	  if (in_quotes)
-	    {
-	      fputs_filtered ("\", ", stream);
-	      in_quotes = 0;
-	    }
-	  m2_printchar (string[i], type, stream);
-	  fprintf_filtered (stream, " <repeats %u times>", reps);
-	  i = rep1 - 1;
-	  things_printed += options->repeat_count_threshold;
-	  need_comma = 1;
-	}
-      else
-	{
-	  if (!in_quotes)
-	    {
-	      fputs_filtered ("\"", stream);
-	      in_quotes = 1;
-	    }
-	  LA_EMIT_CHAR (string[i], type, stream, '"');
-	  ++things_printed;
-	}
-    }
-
-  /* Terminate the quotes if necessary.  */
-  if (in_quotes)
-    fputs_filtered ("\"", stream);
-
-  if (force_ellipses || i < length)
-    fputs_filtered ("...", stream);
-}
-
 /* Return true if TYPE is a string.  */
 
 static bool
@@ -309,7 +229,6 @@ extern const struct language_data m2_language_data =
   macro_expansion_no,
   NULL,
   &exp_descriptor_modula2,
-  m2_printstr,			/* function to print string constant */
   m2_print_typedef,		/* Print a typedef using appropriate syntax */
   NULL,		                /* name_of_this */
   false,			/* la_store_sym_names_in_linkage_form_p */
@@ -433,6 +352,81 @@ public:
   {
     m2_printchar (ch, chtype, stream);
   }
+
+  /* See language.h.  */
+
+  void printstr (struct ui_file *stream, struct type *elttype,
+		 const gdb_byte *string, unsigned int length,
+		 const char *encoding, int force_ellipses,
+		 const struct value_print_options *options) const override
+  {
+    unsigned int i;
+    unsigned int things_printed = 0;
+    int in_quotes = 0;
+    int need_comma = 0;
+
+    if (length == 0)
+      {
+	fputs_filtered ("\"\"", gdb_stdout);
+	return;
+      }
+
+    for (i = 0; i < length && things_printed < options->print_max; ++i)
+      {
+	/* Position of the character we are examining
+	   to see whether it is repeated.  */
+	unsigned int rep1;
+	/* Number of repetitions we have detected so far.  */
+	unsigned int reps;
+
+	QUIT;
+
+	if (need_comma)
+	  {
+	    fputs_filtered (", ", stream);
+	    need_comma = 0;
+	  }
+
+	rep1 = i + 1;
+	reps = 1;
+	while (rep1 < length && string[rep1] == string[i])
+	  {
+	    ++rep1;
+	    ++reps;
+	  }
+
+	if (reps > options->repeat_count_threshold)
+	  {
+	    if (in_quotes)
+	      {
+		fputs_filtered ("\", ", stream);
+		in_quotes = 0;
+	      }
+	    m2_printchar (string[i], elttype, stream);
+	    fprintf_filtered (stream, " <repeats %u times>", reps);
+	    i = rep1 - 1;
+	    things_printed += options->repeat_count_threshold;
+	    need_comma = 1;
+	  }
+	else
+	  {
+	    if (!in_quotes)
+	      {
+		fputs_filtered ("\"", stream);
+		in_quotes = 1;
+	      }
+	    LA_EMIT_CHAR (string[i], elttype, stream, '"');
+	    ++things_printed;
+	  }
+      }
+
+    /* Terminate the quotes if necessary.  */
+    if (in_quotes)
+      fputs_filtered ("\"", stream);
+
+    if (force_ellipses || i < length)
+      fputs_filtered ("...", stream);
+  }
 };
 
 /* Single instance of the M2 language.  */

gdb/objc-lang.c

@@ -337,7 +337,6 @@ extern const struct language_data objc_language_data =
   macro_expansion_c,
   objc_extensions,
   &exp_descriptor_standard,
-  c_printstr,		       /* Function to print string constant */
   c_print_typedef,		/* Print a typedef using appropriate syntax */
   "self",		        /* name_of_this */
   false,			/* la_store_sym_names_in_linkage_form_p */

gdb/opencl-lang.c

@@ -1016,7 +1016,6 @@ extern const struct language_data opencl_language_data =
   macro_expansion_c,
   NULL,
   &exp_descriptor_opencl,
-  c_printstr,			/* Function to print string constant */
   c_print_typedef,		/* Print a typedef using appropriate syntax */
   NULL,                         /* name_of_this */
   false,			/* la_store_sym_names_in_linkage_form_p */

gdb/p-lang.c

@@ -202,106 +202,6 @@ pascal_printchar (int c, struct type *type, struct ui_file *stream)
     fputs_filtered ("'", stream);
 }
 
-/* Print the character string STRING, printing at most LENGTH characters.
-   Printing stops early if the number hits print_max; repeat counts
-   are printed as appropriate.  Print ellipses at the end if we
-   had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.  */
-
-void
-pascal_printstr (struct ui_file *stream, struct type *type,
-		 const gdb_byte *string, unsigned int length,
-		 const char *encoding, int force_ellipses,
-		 const struct value_print_options *options)
-{
-  enum bfd_endian byte_order = type_byte_order (type);
-  unsigned int i;
-  unsigned int things_printed = 0;
-  int in_quotes = 0;
-  int need_comma = 0;
-  int width;
-
-  /* Preserve TYPE's original type, just set its LENGTH.  */
-  check_typedef (type);
-  width = TYPE_LENGTH (type);
-
-  /* If the string was not truncated due to `set print elements', and
-     the last byte of it is a null, we don't print that, in traditional C
-     style.  */
-  if ((!force_ellipses) && length > 0
-	&& extract_unsigned_integer (string + (length - 1) * width, width,
-				     byte_order) == 0)
-    length--;
-
-  if (length == 0)
-    {
-      fputs_filtered ("''", stream);
-      return;
-    }
-
-  for (i = 0; i < length && things_printed < options->print_max; ++i)
-    {
-      /* Position of the character we are examining
-         to see whether it is repeated.  */
-      unsigned int rep1;
-      /* Number of repetitions we have detected so far.  */
-      unsigned int reps;
-      unsigned long int current_char;
-
-      QUIT;
-
-      if (need_comma)
-	{
-	  fputs_filtered (", ", stream);
-	  need_comma = 0;
-	}
-
-      current_char = extract_unsigned_integer (string + i * width, width,
-					       byte_order);
-
-      rep1 = i + 1;
-      reps = 1;
-      while (rep1 < length
-	     && extract_unsigned_integer (string + rep1 * width, width,
-					  byte_order) == current_char)
-	{
-	  ++rep1;
-	  ++reps;
-	}
-
-      if (reps > options->repeat_count_threshold)
-	{
-	  if (in_quotes)
-	    {
-	      fputs_filtered ("', ", stream);
-	      in_quotes = 0;
-	    }
-	  pascal_printchar (current_char, type, stream);
-	  fprintf_filtered (stream, " %p[<repeats %u times>%p]",
-			    metadata_style.style ().ptr (),
-			    reps, nullptr);
-	  i = rep1 - 1;
-	  things_printed += options->repeat_count_threshold;
-	  need_comma = 1;
-	}
-      else
-	{
-	  if ((!in_quotes) && (PRINT_LITERAL_FORM (current_char)))
-	    {
-	      fputs_filtered ("'", stream);
-	      in_quotes = 1;
-	    }
-	  pascal_one_char (current_char, stream, &in_quotes);
-	  ++things_printed;
-	}
-    }
-
-  /* Terminate the quotes if necessary.  */
-  if (in_quotes)
-    fputs_filtered ("'", stream);
-
-  if (force_ellipses || i < length)
-    fputs_filtered ("...", stream);
-}
 
 
 /* Table mapping opcodes into strings for printing operators
@@ -376,7 +276,6 @@ extern const struct language_data pascal_language_data =
   macro_expansion_no,
   p_extensions,
   &exp_descriptor_standard,
-  pascal_printstr,		/* Function to print string constant */
   pascal_print_typedef,		/* Print a typedef using appropriate syntax */
   "this",		        /* name_of_this */
   false,			/* la_store_sym_names_in_linkage_form_p */
@@ -499,6 +398,102 @@ public:
     pascal_printchar (ch, chtype, stream);
   }
 
+  /* See language.h.  */
+
+  void printstr (struct ui_file *stream, struct type *elttype,
+		 const gdb_byte *string, unsigned int length,
+		 const char *encoding, int force_ellipses,
+		 const struct value_print_options *options) const override
+  {
+    enum bfd_endian byte_order = type_byte_order (elttype);
+    unsigned int i;
+    unsigned int things_printed = 0;
+    int in_quotes = 0;
+    int need_comma = 0;
+    int width;
+
+    /* Preserve ELTTYPE's original type, just set its LENGTH.  */
+    check_typedef (elttype);
+    width = TYPE_LENGTH (elttype);
+
+    /* If the string was not truncated due to `set print elements', and
+       the last byte of it is a null, we don't print that, in traditional C
+       style.  */
+    if ((!force_ellipses) && length > 0
+	&& extract_unsigned_integer (string + (length - 1) * width, width,
+				     byte_order) == 0)
+      length--;
+
+    if (length == 0)
+      {
+	fputs_filtered ("''", stream);
+	return;
+      }
+
+    for (i = 0; i < length && things_printed < options->print_max; ++i)
+      {
+	/* Position of the character we are examining
+	   to see whether it is repeated.  */
+	unsigned int rep1;
+	/* Number of repetitions we have detected so far.  */
+	unsigned int reps;
+	unsigned long int current_char;
+
+	QUIT;
+
+	if (need_comma)
+	  {
+	    fputs_filtered (", ", stream);
+	    need_comma = 0;
+	  }
+
+	current_char = extract_unsigned_integer (string + i * width, width,
+						 byte_order);
+
+	rep1 = i + 1;
+	reps = 1;
+	while (rep1 < length
+	       && extract_unsigned_integer (string + rep1 * width, width,
+					    byte_order) == current_char)
+	  {
+	    ++rep1;
+	    ++reps;
+	  }
+
+	if (reps > options->repeat_count_threshold)
+	  {
+	    if (in_quotes)
+	      {
+		fputs_filtered ("', ", stream);
+		in_quotes = 0;
+	      }
+	    pascal_printchar (current_char, elttype, stream);
+	    fprintf_filtered (stream, " %p[<repeats %u times>%p]",
+			      metadata_style.style ().ptr (),
+			      reps, nullptr);
+	    i = rep1 - 1;
+	    things_printed += options->repeat_count_threshold;
+	    need_comma = 1;
+	  }
+	else
+	  {
+	    if ((!in_quotes) && (PRINT_LITERAL_FORM (current_char)))
+	      {
+		fputs_filtered ("'", stream);
+		in_quotes = 1;
+	      }
+	    pascal_one_char (current_char, stream, &in_quotes);
+	    ++things_printed;
+	  }
+      }
+
+    /* Terminate the quotes if necessary.  */
+    if (in_quotes)
+      fputs_filtered ("'", stream);
+
+    if (force_ellipses || i < length)
+      fputs_filtered ("...", stream);
+  }
 };
 
 /* Single instance of the Pascal language class.  */

gdb/p-lang.h

@@ -56,10 +56,6 @@ extern int
 
 extern void pascal_printchar (int, struct type *, struct ui_file *);
 
-extern void pascal_printstr (struct ui_file *, struct type *, const gdb_byte *,
-			     unsigned int, const char *, int,
-			     const struct value_print_options *);
-
 extern struct type **const pascal_builtin_types[];
 
 /* These are in p-typeprint.c: */

gdb/rust-lang.c

@@ -281,7 +281,7 @@ rust_get_trait_object_pointer (struct value *value)
 
 
 
-/* la_printstr implementation for Rust.  */
+/* language_defn::printstr implementation for Rust.  */
 
 static void
 rust_printstr (struct ui_file *stream, struct type *type,
@@ -1953,7 +1953,6 @@ extern const struct language_data rust_language_data =
   macro_expansion_no,
   rust_extensions,
   &exp_descriptor_rust,
-  rust_printstr,		/* Function to print string constant */
   rust_print_typedef,		/* Print a typedef using appropriate syntax */
   NULL,				/* name_of_this */
   false,			/* la_store_sym_names_in_linkage_form_p */
@@ -2145,6 +2144,17 @@ public:
     LA_EMIT_CHAR (ch, chtype, stream, '\'');
     fputs_filtered ("'", stream);
   }
+
+  /* See language.h.  */
+
+  void printstr (struct ui_file *stream, struct type *elttype,
+		 const gdb_byte *string, unsigned int length,
+		 const char *encoding, int force_ellipses,
+		 const struct value_print_options *options) const override
+  {
+    rust_printstr (stream, elttype, string, length, encoding,
+		   force_ellipses, options);
+  }
 };
 
 /* Single instance of the Rust language class.  */