* ada-lang.c (ada_read_renaming_var_value): Pass const

pointer to expression string to parse_exp_1.
	(create_excep_cond_exprs): Likewise.
	* ax-gdb.c (agent_eval_command_one): Likewise.
	(maint_agent_printf_command): Likewise.
	Constify much of the string handling/parsing.
	* breakpoint.c (set_breakpoint_condition): Pass const
	pointer to expression string to parse_exp_1.
	(update_watchpoint): Likewise.
	(parse_cmd_to_aexpr): Constify string handling.
	Pass const pointer to parse_exp_1.
	(init_breakpoint_sal): Pass const pointer to parse_exp_1.
	(find_condition_and_thread): Likewise.
	Make TOK const.
	(watch_command_1): Make "arg" const.
	Constify string handling.
	Copy the expression string instead of changing the input
	string.
	(update_breakpoint_location): Pass const pointer to
	parse_exp_1.
	* eval.c (parse_and_eval_address): Make "exp" const.
	(parse_to_comma_and_eval): Make "expp" const.
	(parse_and_eval): Make "exp" const.
	* expression.h (parse_expression): Make argument const.
	(parse_exp_1): Make first argument const.
	* findcmd.c (parse_find_args): Treat "args" as const.
	* linespec.c (parse_linespec): Pass const pointer to
	linespec_expression_to_pc.
	(linespec_expression_to_pc): Make "exp_ptr" const.
	* parse.c (parse_exp_1): Make "stringptr" const.
	Make a copy of the expression to pass to parse_exp_in_context until
	this whole interface can be constified.
	(parse_expression): Make "string" const.
	* printcmd.c (ui_printf): Treat "arg" as const.
	Handle const strings.
	* tracepoint.c (validate_actionline): Pass const pointer to
	all calls to parse_exp_1.
	(encode_actions_1): Likewise.
	* value.h (parse_to_comma_and_eval): Make argument const.
	(parse_and_eval_address): Likewise.
	(parse_and_eval): Likewise.
	* varobj.c (varobj_create): Pass const pointer to parse_exp_1.
	(varobj_set_value): Likewise.
	* cli/cli-cmds.c (disassemble_command): Treat "arg" as const and
	constify string handling.
	Pass const pointers to parse_and_eval_address and
	parse_to_comman_and_eval.
	* cli/cli-utils.c (skip_to_space): Rename to ...
	(skip_to_space_const): ... this. Handle const strings.
	* cli/cli-utils.h (skip_to_space): Turn into macro which invokes
	skip_to_space_const.
	(skip_to_space_const): Declare.
	* common/format.c (parse_format_string): Make "arg" const.
	Handle const strings.
	* common/format.h (parse_format_string): Make "arg" const.
	* gdbserver/ax.c (ax_printf): Make "format" const.
	* python/python.c (gdbpy_parse_and_eval): Do not make a copy
	of the expression string.

gdb/findcmd.c

@@ -69,7 +69,7 @@ parse_find_args (char *args, ULONGEST *max_countp,
   ULONGEST pattern_len;
   CORE_ADDR start_addr;
   ULONGEST search_space_len;
-  char *s = args;
+  const char *s = args;
   struct cleanup *old_cleanups;
   struct value *v;
 
@@ -110,7 +110,7 @@ parse_find_args (char *args, ULONGEST *max_countp,
 	    }
 	}
 
-      s = skip_spaces (s);
+      s = skip_spaces_const (s);
     }
 
   /* Get the search range.  */
@@ -120,7 +120,7 @@ parse_find_args (char *args, ULONGEST *max_countp,
 
   if (*s == ',')
     ++s;
-  s = skip_spaces (s);
+  s = skip_spaces_const (s);
 
   if (*s == '+')
     {
@@ -171,7 +171,7 @@ parse_find_args (char *args, ULONGEST *max_countp,
       struct type *t;
       ULONGEST pattern_buf_size_need;
 
-      s = skip_spaces (s);
+      s = skip_spaces_const (s);
 
       v = parse_to_comma_and_eval (&s);
       t = value_type (v);
@@ -219,7 +219,7 @@ parse_find_args (char *args, ULONGEST *max_countp,
 
       if (*s == ',')
 	++s;
-      s = skip_spaces (s);
+      s = skip_spaces_const (s);
     }
 
   if (pattern_buf_end == pattern_buf)