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-rw-r--r--gdb/cli/cli-utils.c186
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diff --git a/gdb/cli/cli-utils.c b/gdb/cli/cli-utils.c
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+/* 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;
+}