1 /* Shared general utility routines for GDB, the GNU debugger.
3 Copyright (C) 1986-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "common-defs.h"
21 #include "host-defs.h"
24 /* The xmalloc() (libiberty.h) family of memory management routines.
26 These are like the ISO-C malloc() family except that they implement
27 consistent semantics and guard against typical memory management
30 /* NOTE: These are declared using PTR to ensure consistency with
31 "libiberty.h". xfree() is GDB local. */
38 /* See libiberty/xmalloc.c. This function need's to match that's
39 semantics. It never returns NULL. */
43 val = malloc (size); /* ARI: malloc */
45 malloc_failure (size);
51 xrealloc (PTR ptr, size_t size) /* ARI: PTR */
55 /* See libiberty/xmalloc.c. This function need's to match that's
56 semantics. It never returns NULL. */
61 val = realloc (ptr, size); /* ARI: realloc */
63 val = malloc (size); /* ARI: malloc */
65 malloc_failure (size);
71 xcalloc (size_t number, size_t size)
75 /* See libiberty/xmalloc.c. This function need's to match that's
76 semantics. It never returns NULL. */
77 if (number == 0 || size == 0)
83 mem = calloc (number, size); /* ARI: xcalloc */
85 malloc_failure (number * size);
93 return xcalloc (1, size);
100 free (ptr); /* ARI: free */
104 xmalloc_failed (size_t size)
106 malloc_failure (size);
109 /* Like asprintf/vasprintf but get an internal_error if the call
113 xstrprintf (const char *format, ...)
118 va_start (args, format);
119 ret = xstrvprintf (format, args);
125 xstrvprintf (const char *format, va_list ap)
128 int status = vasprintf (&ret, format, ap);
130 /* NULL is returned when there was a memory allocation problem, or
131 any other error (for instance, a bad format string). A negative
132 status (the printed length) with a non-NULL buffer should never
133 happen, but just to be sure. */
134 if (ret == NULL || status < 0)
135 internal_error (__FILE__, __LINE__, _("vasprintf call failed"));
140 xsnprintf (char *str, size_t size, const char *format, ...)
145 va_start (args, format);
146 ret = vsnprintf (str, size, format, args);
147 gdb_assert (ret < size);
153 /* See documentation in common-utils.h. */
156 string_printf (const char* fmt, ...)
162 size = vsnprintf (NULL, 0, fmt, vp);
165 std::string str (size, '\0');
167 /* C++11 and later guarantee std::string uses contiguous memory and
168 always includes the terminating '\0'. */
170 vsprintf (&str[0], fmt, vp);
177 savestring (const char *ptr, size_t len)
179 char *p = (char *) xmalloc (len + 1);
181 memcpy (p, ptr, len);
186 /* The bit offset of the highest byte in a ULONGEST, for overflow
189 #define HIGH_BYTE_POSN ((sizeof (ULONGEST) - 1) * HOST_CHAR_BIT)
191 /* True (non-zero) iff DIGIT is a valid digit in radix BASE,
192 where 2 <= BASE <= 36. */
195 is_digit_in_base (unsigned char digit, int base)
197 if (!isalnum (digit))
200 return (isdigit (digit) && digit < base + '0');
202 return (isdigit (digit) || tolower (digit) < base - 10 + 'a');
206 digit_to_int (unsigned char c)
211 return tolower (c) - 'a' + 10;
214 /* As for strtoul, but for ULONGEST results. */
217 strtoulst (const char *num, const char **trailer, int base)
219 unsigned int high_part;
224 /* Skip leading whitespace. */
225 while (isspace (num[i]))
228 /* Handle prefixes. */
231 else if (num[i] == '-')
237 if (base == 0 || base == 16)
239 if (num[i] == '0' && (num[i + 1] == 'x' || num[i + 1] == 'X'))
247 if (base == 0 && num[i] == '0')
253 if (base < 2 || base > 36)
259 result = high_part = 0;
260 for (; is_digit_in_base (num[i], base); i += 1)
262 result = result * base + digit_to_int (num[i]);
263 high_part = high_part * base + (unsigned int) (result >> HIGH_BYTE_POSN);
264 result &= ((ULONGEST) 1 << HIGH_BYTE_POSN) - 1;
265 if (high_part > 0xff)
268 result = ~ (ULONGEST) 0;
278 result = result + ((ULONGEST) high_part << HIGH_BYTE_POSN);
285 /* See documentation in common-utils.h. */
288 skip_spaces (char *chp)
292 while (*chp && isspace (*chp))
297 /* A const-correct version of the above. */
300 skip_spaces_const (const char *chp)
304 while (*chp && isspace (*chp))
309 /* See documentation in common-utils.h. */
312 skip_to_space_const (const char *chp)
316 while (*chp && !isspace (*chp))