-/* GDB CLI utility library.
- Copyright (c) 2001, 2007 Free Software Foundation, Inc.
+/* 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
#include "defs.h"
#include "cli/cli-utils.h"
+#include "gdb_string.h"
+#include "value.h"
+#include "gdb_assert.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 (char **pp, int trailer)
+{
+ int retval = 0; /* default */
+ 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."));
+ 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;
+ 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. */
+
+void
+init_number_or_range (struct get_number_or_range_state *state,
+ 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 == '-')
+ {
+ 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 (state->string + 1);
+ state->end_value = get_number (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 (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;
+}
+
+/* See documentation in cli-utils.h. */
+char *
+skip_to_space (char *chp)
+{
+ if (chp == NULL)
+ return NULL;
+ while (*chp && !isspace (*chp))
+ chp++;
+ return chp;
+}
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