[RFA v2 3/8] Make print_command_trace varargs

Tom Tromey
2018-04-25T15:41:40Z

I noticed some code in execute_control_command_1 that could be
simplified by making print_command_trace a printf-like function. This
patch makes this change.

gdb/ChangeLog
2018-04-25 Tom Tromey <tom@tromey.com>

* top.c (execute_command): Update.
* cli/cli-script.h (print_command_lines): Now varargs.
* cli/cli-script.c (print_command_lines): Now varargs.
(execute_control_command_1) <case while_control, case if_control>:
Update.
---
gdb/ChangeLog | 8 ++++++++
gdb/cli/cli-script.c | 22 ++++++++++------------
gdb/cli/cli-script.h | 3 ++-
gdb/top.c | 2 +-
4 files changed, 21 insertions(+), 14 deletions(-)

diff --git a/gdb/cli/cli-script.c b/gdb/cli/cli-script.c
index b066da7d60..c7d405c0d0 100644
--- a/gdb/cli/cli-script.c
+++ b/gdb/cli/cli-script.c
@@ -426,8 +426,9 @@ reset_command_nest_depth (void)
via while_command or if_command. Inner levels of 'if' and 'while'
are dealt with directly. Therefore we can use these functions
to determine whether the command has been printed already or not. */
+ATTRIBUTE_PRINTF (1, 2)
void
-print_command_trace (const char *cmd)
+print_command_trace (const char *fmt, ...)
{
int i;

@@ -443,7 +444,12 @@ print_command_trace (const char *cmd)
for (i=0; i < command_nest_depth; i++)
printf_filtered ("+");

- printf_filtered ("%s\n", cmd);
+ va_list args;
+
+ va_start (args, fmt);
+ vprintf_filtered (fmt, args);
+ va_end (args);
+ puts_filtered ("\n");
}

/* Helper for execute_control_command. */
@@ -490,11 +496,7 @@ execute_control_command_1 (struct command_line *cmd)

case while_control:
{
- int len = strlen (cmd->line) + 7;
- char *buffer = (char *) alloca (len);
-
- xsnprintf (buffer, len, "while %s", cmd->line);
- print_command_trace (buffer);
+ print_command_trace ("while %s", cmd->line);

/* Parse the loop control expression for the while statement. */
std::string new_line = insert_user_defined_cmd_args (cmd->line);
@@ -555,11 +557,7 @@ execute_control_command_1 (struct command_line *cmd)

case if_control:
{
- int len = strlen (cmd->line) + 4;
- char *buffer = (char *) alloca (len);
-
- xsnprintf (buffer, len, "if %s", cmd->line);
- print_command_trace (buffer);
+ print_command_trace ("if %s", cmd->line);

/* Parse the conditional for the if statement. */
std::string new_line = insert_user_defined_cmd_args (cmd->line);
diff --git a/gdb/cli/cli-script.h b/gdb/cli/cli-script.h
index 58dede2342..10b6c17789 100644
--- a/gdb/cli/cli-script.h
+++ b/gdb/cli/cli-script.h
@@ -148,7 +148,8 @@ extern std::string insert_user_defined_cmd_args (const char *line);

/* Exported to top.c */

-extern void print_command_trace (const char *cmd);
+extern void print_command_trace (const char *cmd, ...)
+ ATTRIBUTE_PRINTF (1, 2);

/* Exported to event-top.c */

diff --git a/gdb/top.c b/gdb/top.c
index 8903a92983..6f5abd5a3d 100644
--- a/gdb/top.c
+++ b/gdb/top.c
@@ -571,7 +571,7 @@ execute_command (const char *p, int from_tty)
line = p;

/* If trace-commands is set then this will print this command. */
- print_command_trace (p);
+ print_command_trace ("%s", p);

c = lookup_cmd (&cmd, cmdlist, "", 0, 1);
p = cmd;
--
2.13.6