-/* GDB CLI utility library.
- Copyright (c) 2001, 2007 Free Software Foundation, Inc.
+/* CLI utilities.
+
+ Copyright (C) 2011-2014 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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "cli/cli-utils.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 "$" followed by the
+ name of a convenience variable, or ("$" or "$$") followed by digits.
+
+ 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 (const char **pp, int trailer)
+{
+ int retval = 0; /* default */
+ const char *p = *pp;
+
+ if (*p == '$')
+ {
+ struct value *val = value_from_history_ref (p, &p);
+
+ if (val) /* Value history reference */
+ {
+ if (TYPE_CODE (value_type (val)) == TYPE_CODE_INT)
+ retval = value_as_long (val);
+ else
+ {
+ printf_filtered (_("History value must have integer type.\n"));
+ retval = 0;
+ }
+ }
+ else /* Convenience variable */
+ {
+ /* Internal variable. Make a copy of the name, so we can
+ null-terminate it to pass to lookup_internalvar(). */
+ char *varname;
+ const 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_const (p);
+ *pp = p;
+ return retval;
+}
+
+/* See documentation in cli-utils.h. */
+
+int
+get_number_const (const char **pp)
+{
+ return get_number_trailer (pp, '\0');
+}
+
+/* See documentation in cli-utils.h. */
+
+int
+get_number (char **pp)
+{
+ int result;
+ const char *p = *pp;
+
+ result = get_number_trailer (&p, '\0');
+ *pp = (char *) p;
+ return result;
+}
+
+/* See documentation in cli-utils.h. */
+
+void
+init_number_or_range (struct get_number_or_range_state *state,
+ const char *string)
+{
+ memset (state, 0, sizeof (*state));
+ state->string = string;
+}
+
+/* See documentation in cli-utils.h. */
+
+int
+get_number_or_range (struct get_number_or_range_state *state)
+{
+ if (*state->string != '-')
+ {
+ /* Default case: state->string is pointing either to a solo
+ number, or to the first number of a range. */
+ state->last_retval = get_number_trailer (&state->string, '-');
+ if (*state->string == '-')
+ {
+ const 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 = &state->end_ptr;
+ state->end_ptr = skip_spaces_const (state->string + 1);
+ state->end_value = get_number_const (temp);
+ if (state->end_value < state->last_retval)
+ {
+ error (_("inverted range"));
+ }
+ else if (state->end_value == state->last_retval)
+ {
+ /* Degenerate range (number1 == number2). Advance the
+ token pointer so that the range will be treated as a
+ single number. */
+ state->string = state->end_ptr;
+ }
+ else
+ 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;
+ }
+ }
+ state->finished = *state->string == '\0';
+ return state->last_retval;
+}
+
+/* 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.
+
+ By definition, an empty list includes all numbers. This is to
+ be interpreted as typing a command such as "delete break" with
+ no arguments. */
+
+int
+number_is_in_list (const char *list, int number)
+{
+ struct get_number_or_range_state state;
+
+ if (list == NULL || *list == '\0')
+ return 1;
+
+ init_number_or_range (&state, list);
+ while (!state.finished)
+ {
+ int gotnum = get_number_or_range (&state);
+
+ if (gotnum == 0)
+ error (_("Args must be numbers or '$' variables."));
+ if (gotnum == number)
+ return 1;
+ }
+ return 0;
+}
+
+/* See documentation in cli-utils.h. */
+
+char *
+skip_spaces (char *chp)
+{
+ if (chp == NULL)
+ return NULL;
+ while (*chp && isspace (*chp))
+ chp++;
+ return chp;
+}
+
+/* A const-correct version of the above. */
+
+const char *
+skip_spaces_const (const char *chp)
+{
+ if (chp == NULL)
+ return NULL;
+ while (*chp && isspace (*chp))
+ chp++;
+ return chp;
+}
+
+/* See documentation in cli-utils.h. */
+
+const char *
+skip_to_space_const (const char *chp)
+{
+ if (chp == NULL)
+ return NULL;
+ while (*chp && !isspace (*chp))
+ chp++;
+ return chp;
+}
+
+/* See documentation in cli-utils.h. */
+
+char *
+remove_trailing_whitespace (const char *start, char *s)
+{
+ while (s > start && isspace (*(s - 1)))
+ --s;
+
+ return s;
+}
+
+/* See documentation in cli-utils.h. */
+
+char *
+extract_arg_const (const char **arg)
+{
+ const char *result;
+
+ if (!*arg)
+ return NULL;
+
+ /* Find the start of the argument. */
+ *arg = skip_spaces_const (*arg);
+ if (!**arg)
+ return NULL;
+ result = *arg;
+
+ /* Find the end of the argument. */
+ *arg = skip_to_space_const (*arg + 1);
+
+ if (result == *arg)
+ return NULL;
+
+ return savestring (result, *arg - result);
+}
+
+/* See documentation in cli-utils.h. */
+
+char *
+extract_arg (char **arg)
+{
+ const char *arg_const = *arg;
+ char *result;
+
+ result = extract_arg_const (&arg_const);
+ *arg += arg_const - *arg;
+ return result;
+}
+
+/* See documentation in cli-utils.h. */
+int
+check_for_argument (char **str, char *arg, int arg_len)
+{
+ if (strncmp (*str, arg, arg_len) == 0
+ && ((*str)[arg_len] == '\0' || isspace ((*str)[arg_len])))
+ {
+ *str += arg_len;
+ return 1;
+ }
+ return 0;
+}
projects / platform / upstream / binutils.git / blobdiff