Star wildcard ranges (e.g., "info thread 2.*")

Add support for specifying "all threads of inferior N", by writing "*"
as thread number/range in thread ID lists.

E.g., "info threads 2.*" or "thread apply 2.* bt".

gdb/ChangeLog:
2016-01-15  Pedro Alves  <palves@redhat.com>

	* NEWS: Mention star wildcard ranges.
	* cli/cli-utils.c (get_number_or_range): Check state->in_range first.
	(number_range_setup_range): New function.
	* cli/cli-utils.h (number_range_setup_range): New declaration.
	* thread.c (thread_apply_command): Support star TID ranges.
	* tid-parse.c (tid_range_parser_finished)
	(tid_range_parser_string, tid_range_parser_skip)
	(get_tid_or_range, get_tid_or_range): Handle
	TID_RANGE_STATE_STAR_RANGE.
	(tid_range_parser_star_range): New function.
	* tid-parse.h (enum tid_range_state) <TID_RANGE_STATE_STAR_RANGE>:
	New value.
	(tid_range_parser_star_range): New declaration.

gdb/doc/ChangeLog:
2016-01-15  Pedro Alves  <palves@redhat.com>

	* gdb.texinfo (Threads) <thread ID lists>: Document star ranges.

gdb/testsuite/ChangeLog:
2016-01-15  Pedro Alves  <palves@redhat.com>

	* gdb.multi/tids.exp: Test star wildcard ranges.

2 files changed, 38 insertions, 17 deletions

diff --git a/gdb/cli/cli-utils.c b/gdb/cli/cli-utils.c
index a68b67d..0946db0 100644
--- a/gdb/cli/cli-utils.c
+++ b/gdb/cli/cli-utils.c
@@ -134,7 +134,21 @@ init_number_or_range (struct get_number_or_range_state *state,
 int
 get_number_or_range (struct get_number_or_range_state *state)
 {
-  if (*state->string != '-')
+  if (state->in_range)
+    {
+      /* All number-parsing has already been done.  Return the next
+	 integer value (one greater than the saved previous value).
+	 Do not advance the token pointer until the end of range is
+	 reached.  */
+
+      if (++state->last_retval == state->end_value)
+	{
+	  /* End of range reached; advance token pointer.  */
+	  state->string = state->end_ptr;
+	  state->in_range = 0;
+	}
+    }
+  else if (*state->string != '-')
     {
       /* Default case: state->string is pointing either to a solo
 	 number, or to the first number of a range.  */
@@ -165,27 +179,26 @@ get_number_or_range (struct get_number_or_range_state *state)
 	    state->in_range = 1;
 	}
     }
-  else if (! state->in_range)
-    error (_("negative value"));
   else
-    {
-      /* state->string points to the '-' that betokens a range.  All
-	 number-parsing has already been done.  Return the next
-	 integer value (one greater than the saved previous value).
-	 Do not advance the token pointer until the end of range
-	 is reached.  */
-
-      if (++state->last_retval == state->end_value)
-	{
-	  /* End of range reached; advance token pointer.  */
-	  state->string = state->end_ptr;
-	  state->in_range = 0;
-	}
-    }
+    error (_("negative value"));
   state->finished = *state->string == '\0';
   return state->last_retval;
 }
 
+/* See documentation in cli-utils.h.  */
+
+void
+number_range_setup_range (struct get_number_or_range_state *state,
+			  int start_value, int end_value, const char *end_ptr)
+{
+  gdb_assert (start_value > 0);
+
+  state->in_range = 1;
+  state->end_ptr = end_ptr;
+  state->last_retval = start_value - 1;
+  state->end_value = end_value;
+}
+
 /* Accept a number and a string-form list of numbers such as is 
    accepted by get_number_or_range.  Return TRUE if the number is
    in the list.
diff --git a/gdb/cli/cli-utils.h b/gdb/cli/cli-utils.h
index ebf11f2..a31fff5 100644
--- a/gdb/cli/cli-utils.h
+++ b/gdb/cli/cli-utils.h
@@ -90,6 +90,14 @@ extern void init_number_or_range (struct get_number_or_range_state *state,
 
 extern int get_number_or_range (struct get_number_or_range_state *state);
 
+/* Setups STATE such that get_number_or_range returns numbers in range
+   START_VALUE to END_VALUE.  When get_number_or_range returns
+   END_VALUE, the STATE string is advanced to END_PTR.  */
+
+extern void number_range_setup_range (struct get_number_or_range_state *state,
+				      int start_value, int end_value,
+				      const char *end_ptr);
+
 /* Accept a number and a string-form list of numbers such as is 
    accepted by get_number_or_range.  Return TRUE if the number is
    in the list.