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From: Tom Tromey <tom@tromey.com>
To: gdb-patches@sourceware.org
Cc: Tom Tromey <tom@tromey.com>
Subject: [PATCH 04/20] Change tui_make_status_line to return std::string
Date: Tue, 10 Sep 2019 19:09:00 -0000	[thread overview]
Message-ID: <20190910190857.6562-5-tom@tromey.com> (raw)
In-Reply-To: <20190910190857.6562-1-tom@tromey.com>

This changes tui_make_status_line to return std::string.  This cleans
it up a bit, and removes some explicit memory management.

gdb/ChangeLog
2019-09-10  Tom Tromey  <tom@tromey.com>

	* tui/tui-stack.c (tui_make_status_line): Return std::string.
	(tui_locator_window::rerender): Update.
---
 gdb/ChangeLog       |  5 ++++
 gdb/tui/tui-stack.c | 69 ++++++++++++++++-----------------------------
 2 files changed, 30 insertions(+), 44 deletions(-)

diff --git a/gdb/tui/tui-stack.c b/gdb/tui/tui-stack.c
index 36208d0cac0..a2e4a161bb7 100644
--- a/gdb/tui/tui-stack.c
+++ b/gdb/tui/tui-stack.c
@@ -66,14 +66,12 @@ tui_locator_win_info_ptr (void)
 /* Create the status line to display as much information as we can on
    this single line: target name, process number, current function,
    current line, current PC, SingleKey mode.  */
-static char *
+static std::string
 tui_make_status_line (struct tui_locator_window *loc)
 {
-  char *string;
   char line_buf[50], *pname;
-  char *buf;
   int status_size;
-  int i, proc_width;
+  int proc_width;
   const char *pid_name;
   int target_width;
   int pid_width;
@@ -97,8 +95,6 @@ tui_make_status_line (struct tui_locator_window *loc)
     pid_width = MAX_PID_WIDTH;
 
   status_size = tui_term_width ();
-  string = (char *) xmalloc (status_size + 1);
-  buf = (char*) alloca (status_size + 1);
 
   /* Translate line number and obtain its size.  */
   if (loc->line_no > 0)
@@ -158,61 +154,47 @@ tui_make_status_line (struct tui_locator_window *loc)
   pname = loc->proc_name;
 
   /* Now create the locator line from the string version of the
-     elements.  We could use sprintf() here but that wouldn't ensure
-     that we don't overrun the size of the allocated buffer.
-     strcat_to_buf() will.  */
-  *string = (char) 0;
+     elements.  */
+  string_file string;
 
   if (target_width > 0)
-    {
-      sprintf (buf, "%*.*s ",
-               -target_width, target_width, target_shortname);
-      strcat_to_buf (string, status_size, buf);
-    }
+    string.printf ("%*.*s ", -target_width, target_width, target_shortname);
   if (pid_width > 0)
-    {
-      sprintf (buf, "%*.*s ",
-               -pid_width, pid_width, pid_name);
-      strcat_to_buf (string, status_size, buf);
-    }
-  
+    string.printf ("%*.*s ", -pid_width, pid_width, pid_name);
+
   /* Show whether we are in SingleKey mode.  */
   if (tui_current_key_mode == TUI_SINGLE_KEY_MODE)
     {
-      strcat_to_buf (string, status_size, SINGLE_KEY);
-      strcat_to_buf (string, status_size, " ");
+      string.puts (SINGLE_KEY);
+      string.puts (" ");
     }
 
   /* Procedure/class name.  */
   if (proc_width > 0)
     {
       if (strlen (pname) > proc_width)
-        sprintf (buf, "%s%*.*s* ", PROC_PREFIX,
-                 1 - proc_width, proc_width - 1, pname);
+        string.printf ("%s%*.*s* ", PROC_PREFIX,
+		       1 - proc_width, proc_width - 1, pname);
       else
-        sprintf (buf, "%s%*.*s ", PROC_PREFIX,
-                 -proc_width, proc_width, pname);
-      strcat_to_buf (string, status_size, buf);
+        string.printf ("%s%*.*s ", PROC_PREFIX,
+		       -proc_width, proc_width, pname);
     }
 
   if (line_width > 0)
-    {
-      sprintf (buf, "%s%*.*s ", LINE_PREFIX,
-               -line_width, line_width, line_buf);
-      strcat_to_buf (string, status_size, buf);
-    }
+    string.printf ("%s%*.*s ", LINE_PREFIX,
+		   -line_width, line_width, line_buf);
   if (pc_width > 0)
     {
-      strcat_to_buf (string, status_size, PC_PREFIX);
-      strcat_to_buf (string, status_size, pc_buf);
+      string.puts (PC_PREFIX);
+      string.puts (pc_buf);
     }
-  
-  
-  for (i = strlen (string); i < status_size; i++)
-    string[i] = ' ';
-  string[status_size] = (char) 0;
 
-  return string;
+  if (string.size () < status_size)
+    string.puts (n_spaces (status_size - string.size ()));
+  else if (string.size () > status_size)
+    string.string ().erase (status_size, string.size ());
+
+  return std::move (string.string ());
 }
 
 /* Get a printable name for the function at the address.  The symbol
@@ -252,7 +234,7 @@ tui_locator_window::rerender ()
 {
   if (handle != NULL)
     {
-      char *string = tui_make_status_line (this);
+      std::string string = tui_make_status_line (this);
       wmove (handle, 0, 0);
       /* We ignore the return value from wstandout and wstandend, casting
 	 them to void in order to avoid a compiler warning.  The warning
@@ -260,12 +242,11 @@ tui_locator_window::rerender ()
 	 changing these macro to expand to code that causes the compiler
 	 to generate an unused-value warning.  */
       (void) wstandout (handle);
-      waddstr (handle, string);
+      waddstr (handle, string.c_str ());
       wclrtoeol (handle);
       (void) wstandend (handle);
       refresh_window ();
       wmove (handle, 0, 0);
-      xfree (string);
     }
 }
 
-- 
2.17.2

  parent reply	other threads:[~2019-09-10 19:09 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-10 19:09 [PATCH 00/20] Final round of TUI refactorings Tom Tromey
2019-09-10 19:09 ` [PATCH 14/20] Change members of tui_locator_window to std::string Tom Tromey
2019-09-10 19:09 ` [PATCH 09/20] Use "bool" in tui_data_window::show_register_group Tom Tromey
2019-09-10 19:09 ` [PATCH 19/20] Use make_unique_xstrdup in TUI Tom Tromey
2019-09-10 19:09 ` Tom Tromey [this message]
2019-09-10 19:09 ` [PATCH 02/20] Change tui_source_element::line to be a unique_xmalloc_ptr Tom Tromey
2019-09-10 19:09 ` [PATCH 15/20] Rename private data members of tui_data_window Tom Tromey
2019-09-10 19:09 ` [PATCH 17/20] Remove strcat_to_buf Tom Tromey
2019-09-10 19:09 ` [PATCH 10/20] Change "win_resized" to bool Tom Tromey
2019-09-10 19:09 ` [PATCH 18/20] Remove separator comments from TUI Tom Tromey
2019-09-10 19:09 ` [PATCH 13/20] Remove a call to tui_locator_win_info_ptr Tom Tromey
2019-09-10 19:09 ` [PATCH 07/20] Simplify tui_source_window_base::show_source_content Tom Tromey
2019-09-10 19:09 ` [PATCH 03/20] Move "fullname" to tui_source_window Tom Tromey
2019-09-10 19:09 ` [PATCH 08/20] Simplify TUI disassembly Tom Tromey
2019-09-10 19:09 ` [PATCH 11/20] Set TUI locator height to 1 Tom Tromey
2019-09-10 19:09 ` [PATCH 06/20] Remove some explicit re-rendering from the TUI Tom Tromey
2019-09-10 19:09 ` [PATCH 05/20] Change tui_make_status_line to be a method Tom Tromey
2019-09-10 19:09 ` [PATCH 20/20] Change TUI window commands to be case-sensitive Tom Tromey
2019-09-11  2:34   ` Eli Zaretskii
2019-09-11 21:57     ` Tom Tromey
2019-09-12  3:29       ` Eli Zaretskii
2019-09-10 19:09 ` [PATCH 16/20] Rename a private data member in tui_source_window Tom Tromey
2019-09-10 19:09 ` [PATCH 01/20] Remove tui_clear_source_windows_detail Tom Tromey
2019-09-10 19:09 ` [PATCH 12/20] Don't call refresh in tui_resize_all Tom Tromey
2019-09-20 19:29 ` [PATCH 00/20] Final round of TUI refactorings Tom Tromey

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