Make check_for_argument skip whitespace after arg itself

Basically every caller of check_for_argument needs to skip space after
the argument.  This patch makes check_for_argument do it itself.

Suggested by Philippe Waroquiers.

gdb/ChangeLog:
2019-06-13  Pedro Alves <palves@redhat.com>

	* ax-gdb.c (agent_command_1): Remove skip_spaces call.
	* breakpoint.c (watch_maybe_just_location): Remove skip_spaces
	call.
	* cli/cli-cmds.c (apropos_command): Remove skip_spaces call.
	* cli/cli-utils.c (extract_info_print_args): Remove skip_spaces
	calls.
	(check_for_argument): Skip spaces after argument.

3 files changed, 4 insertions, 6 deletions

diff --git a/gdb/cli/cli-cmds.c b/gdb/cli/cli-cmds.c
index 5c44ba9..62f4d7f 100644
--- a/gdb/cli/cli-cmds.c
+++ b/gdb/cli/cli-cmds.c
@@ -1381,9 +1381,6 @@ apropos_command (const char *arg, int from_tty)
 {
   bool verbose = arg && check_for_argument (&arg, "-v", 2);
 
-  if (verbose)
-    arg = skip_spaces (arg);
-
   if (arg == NULL || *arg == '\0')
     error (_("REGEXP string is empty"));
 
diff --git a/gdb/cli/cli-utils.c b/gdb/cli/cli-utils.c
index c8b07f0..a24fe92 100644
--- a/gdb/cli/cli-utils.c
+++ b/gdb/cli/cli-utils.c
@@ -139,7 +139,6 @@ extract_info_print_args (const char **args,
   /* Check for NAMEREGEXP or -- NAMEREGEXP.  */
   if (**args != '-' || check_for_argument (args, "--", 2))
     {
-      *args = skip_spaces (*args);
       *regexp = *args;
       *args = NULL;
       return true;
@@ -155,7 +154,6 @@ extract_info_print_args (const char **args,
   if (check_for_argument (args, "-q", 2))
     {
       *quiet = true;
-      *args = skip_spaces (*args);
       return true;
     }
 
@@ -459,6 +457,7 @@ check_for_argument (const char **str, const char *arg, int arg_len)
       && ((*str)[arg_len] == '\0' || isspace ((*str)[arg_len])))
     {
       *str += arg_len;
+      *str = skip_spaces (*str);
       return 1;
     }
   return 0;
diff --git a/gdb/cli/cli-utils.h b/gdb/cli/cli-utils.h
index d0161db..9425fb4 100644
--- a/gdb/cli/cli-utils.h
+++ b/gdb/cli/cli-utils.h
@@ -188,7 +188,9 @@ extern std::string extract_arg (const char **arg);
 /* A helper function that looks for an argument at the start of a
    string.  The argument must also either be at the end of the string,
    or be followed by whitespace.  Returns 1 if it finds the argument,
-   0 otherwise.  If the argument is found, it updates *STR.  */
+   0 otherwise.  If the argument is found, it updates *STR to point
+   past the argument and past any whitespace following the
+   argument.  */
 extern int check_for_argument (const char **str, const char *arg, int arg_len);
 
 /* Same, for non-const STR.  */