* reverse.c: Include cli-utils.h.

* printcmd.c: Include cli-utils.h.
	(string_printf): Use skip_spaces.
	* cli/cli-utils.h: New file.
	* cli/cli-utils.c: New file.
	* cli/cli-dump.h (skip_spaces): Move to cli-utils.h.
	* cli/cli-dump.c (skip_spaces): Move to cli-utils.c.
	* breakpoint.h (get_number, get_number_or_range): Move to
	cli-utils.h.
	* breakpoint.c: Include cli-utils.h.
	(get_number_trailer, get_number, get_number_or_range)
	(ep_skip_leading_whitespace): Move to cli-utils.c.
	(create_breakpoint_sal, find_condition_and_thread)
	(decode_static_tracepoint_spec, watch_command_1)
	(watch_maybe_just_location, ep_parse_optional_if_clause)
	(catch_fork_command_1, catch_exec_command_1)
	(catch_syscall_command_1): Use skip_spaces, skip_to_space.
	* Makefile.in (SUBDIR_CLI_OBS): Add cli-utils.o.
	(SUBDIR_CLI_SRCS): Add cli-utils.c.
	(HFILES_NO_SRCDIR): Add cli-utils.h.
	(cli-utils.o): New target.

gdb/cli/cli-utils.c

@@ -0,0 +1,186 @@
+/* CLI utilities.
+
+   Copyright (c) 2011 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "cli/cli-utils.h"
+#include "gdb_string.h"
+#include "value.h"
+
+#include <ctype.h>
+
+/* *PP is a string denoting a number.  Get the number of the.  Advance
+   *PP after the string and any trailing whitespace.
+
+   Currently the string can either be a number or "$" followed by the
+   name of a convenience variable.
+
+   TRAILER is a character which can be found after the number; most
+   commonly this is `-'.  If you don't want a trailer, use \0.  */
+
+static int
+get_number_trailer (char **pp, int trailer)
+{
+  int retval = 0;	/* default */
+  char *p = *pp;
+
+  if (*p == '$')
+    {
+      /* Make a copy of the name, so we can null-terminate it
+         to pass to lookup_internalvar().  */
+      char *varname;
+      char *start = ++p;
+      LONGEST val;
+
+      while (isalnum (*p) || *p == '_')
+	p++;
+      varname = (char *) alloca (p - start + 1);
+      strncpy (varname, start, p - start);
+      varname[p - start] = '\0';
+      if (get_internalvar_integer (lookup_internalvar (varname), &val))
+	retval = (int) val;
+      else
+	{
+	  printf_filtered (_("Convenience variable must "
+			     "have integer value.\n"));
+	  retval = 0;
+	}
+    }
+  else
+    {
+      if (*p == '-')
+	++p;
+      while (*p >= '0' && *p <= '9')
+	++p;
+      if (p == *pp)
+	/* There is no number here.  (e.g. "cond a == b").  */
+	{
+	  /* Skip non-numeric token.  */
+	  while (*p && !isspace((int) *p))
+	    ++p;
+	  /* Return zero, which caller must interpret as error.  */
+	  retval = 0;
+	}
+      else
+	retval = atoi (*pp);
+    }
+  if (!(isspace (*p) || *p == '\0' || *p == trailer))
+    {
+      /* Trailing junk: return 0 and let caller print error msg.  */
+      while (!(isspace (*p) || *p == '\0' || *p == trailer))
+	++p;
+      retval = 0;
+    }
+  p = skip_spaces (p);
+  *pp = p;
+  return retval;
+}
+
+/* See documentation in cli-utils.h.  */
+
+int
+get_number (char **pp)
+{
+  return get_number_trailer (pp, '\0');
+}
+
+/* See documentation in cli-utils.h.  */
+
+int
+get_number_or_range (char **pp)
+{
+  static int last_retval, end_value;
+  static char *end_ptr;
+  static int in_range = 0;
+
+  if (**pp != '-')
+    {
+      /* Default case: pp is pointing either to a solo number, 
+	 or to the first number of a range.  */
+      last_retval = get_number_trailer (pp, '-');
+      if (**pp == '-')
+	{
+	  char **temp;
+
+	  /* This is the start of a range (<number1> - <number2>).
+	     Skip the '-', parse and remember the second number,
+	     and also remember the end of the final token.  */
+
+	  temp = &end_ptr; 
+	  end_ptr = *pp + 1; 
+	  while (isspace ((int) *end_ptr))
+	    end_ptr++;	/* skip white space */
+	  end_value = get_number (temp);
+	  if (end_value < last_retval) 
+	    {
+	      error (_("inverted range"));
+	    }
+	  else if (end_value == last_retval)
+	    {
+	      /* Degenerate range (number1 == number2).  Advance the
+		 token pointer so that the range will be treated as a
+		 single number.  */ 
+	      *pp = end_ptr;
+	    }
+	  else
+	    in_range = 1;
+	}
+    }
+  else if (! in_range)
+    error (_("negative value"));
+  else
+    {
+      /* pp 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 'pp' until the end of range
+	 is reached.  */
+
+      if (++last_retval == end_value)
+	{
+	  /* End of range reached; advance token pointer.  */
+	  *pp = end_ptr;
+	  in_range = 0;
+	}
+    }
+  return last_retval;
+}
+
+/* See documentation in cli-utils.h.  */
+
+char *
+skip_spaces (char *chp)
+{
+  if (chp == NULL)
+    return NULL;
+  while (*chp && isspace (*chp))
+    chp++;
+  return chp;
+}
+
+/* See documentation in cli-utils.h.  */
+
+char *
+skip_to_space (char *chp)
+{
+  if (chp == NULL)
+    return NULL;
+  while (*chp && !isspace (*chp))
+    chp++;
+  return chp;
+}