1 /* Shared general utility routines for GDB, the GNU debugger.
3 Copyright (C) 1986-2022 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 "common-utils.h"
22 #include "host-defs.h"
23 #include "safe-ctype.h"
24 #include "gdbsupport/gdb-xfree.h"
29 return xcalloc (1, size);
32 /* Like asprintf/vasprintf but get an internal_error if the call
35 gdb::unique_xmalloc_ptr<char>
36 xstrprintf (const char *format, ...)
40 va_start (args, format);
41 gdb::unique_xmalloc_ptr<char> ret = xstrvprintf (format, args);
46 gdb::unique_xmalloc_ptr<char>
47 xstrvprintf (const char *format, va_list ap)
50 int status = vasprintf (&ret, format, ap);
52 /* NULL is returned when there was a memory allocation problem, or
53 any other error (for instance, a bad format string). A negative
54 status (the printed length) with a non-NULL buffer should never
55 happen, but just to be sure. */
56 if (ret == NULL || status < 0)
57 internal_error (_("vasprintf call failed"));
58 return gdb::unique_xmalloc_ptr<char> (ret);
62 xsnprintf (char *str, size_t size, const char *format, ...)
67 va_start (args, format);
68 ret = vsnprintf (str, size, format, args);
69 gdb_assert (ret < size);
75 /* See documentation in common-utils.h. */
78 string_printf (const char* fmt, ...)
84 size = vsnprintf (NULL, 0, fmt, vp);
87 std::string str (size, '\0');
89 /* C++11 and later guarantee std::string uses contiguous memory and
90 always includes the terminating '\0'. */
92 vsprintf (&str[0], fmt, vp); /* ARI: vsprintf */
98 /* See documentation in common-utils.h. */
101 string_vprintf (const char* fmt, va_list args)
107 size = vsnprintf (NULL, 0, fmt, vp);
110 std::string str (size, '\0');
112 /* C++11 and later guarantee std::string uses contiguous memory and
113 always includes the terminating '\0'. */
114 vsprintf (&str[0], fmt, args); /* ARI: vsprintf */
120 /* See documentation in common-utils.h. */
123 string_appendf (std::string &str, const char *fmt, ...)
128 string_vappendf (str, fmt, vp);
135 /* See documentation in common-utils.h. */
138 string_vappendf (std::string &str, const char *fmt, va_list args)
144 grow_size = vsnprintf (NULL, 0, fmt, vp);
147 size_t curr_size = str.size ();
148 str.resize (curr_size + grow_size);
150 /* C++11 and later guarantee std::string uses contiguous memory and
151 always includes the terminating '\0'. */
152 vsprintf (&str[curr_size], fmt, args); /* ARI: vsprintf */
158 savestring (const char *ptr, size_t len)
160 char *p = (char *) xmalloc (len + 1);
162 memcpy (p, ptr, len);
167 /* See documentation in common-utils.h. */
170 extract_string_maybe_quoted (const char **arg)
174 bool bsquote = false;
176 const char *p = *arg;
178 /* Find the start of the argument. */
181 /* Parse p similarly to gdb_argv buildargv function. */
184 if (ISSPACE (*p) && !squote && !dquote && !bsquote)
226 /* The bit offset of the highest byte in a ULONGEST, for overflow
229 #define HIGH_BYTE_POSN ((sizeof (ULONGEST) - 1) * HOST_CHAR_BIT)
231 /* True (non-zero) iff DIGIT is a valid digit in radix BASE,
232 where 2 <= BASE <= 36. */
235 is_digit_in_base (unsigned char digit, int base)
237 if (!ISALNUM (digit))
240 return (ISDIGIT (digit) && digit < base + '0');
242 return (ISDIGIT (digit) || TOLOWER (digit) < base - 10 + 'a');
246 digit_to_int (unsigned char c)
251 return TOLOWER (c) - 'a' + 10;
254 /* As for strtoul, but for ULONGEST results. */
257 strtoulst (const char *num, const char **trailer, int base)
259 unsigned int high_part;
264 /* Skip leading whitespace. */
265 while (ISSPACE (num[i]))
268 /* Handle prefixes. */
271 else if (num[i] == '-')
277 if (base == 0 || base == 16)
279 if (num[i] == '0' && (num[i + 1] == 'x' || num[i + 1] == 'X'))
287 if (base == 0 && num[i] == '0')
293 if (base < 2 || base > 36)
299 result = high_part = 0;
300 for (; is_digit_in_base (num[i], base); i += 1)
302 result = result * base + digit_to_int (num[i]);
303 high_part = high_part * base + (unsigned int) (result >> HIGH_BYTE_POSN);
304 result &= ((ULONGEST) 1 << HIGH_BYTE_POSN) - 1;
305 if (high_part > 0xff)
308 result = ~ (ULONGEST) 0;
318 result = result + ((ULONGEST) high_part << HIGH_BYTE_POSN);
325 /* See documentation in common-utils.h. */
328 skip_spaces (char *chp)
332 while (*chp && ISSPACE (*chp))
337 /* A const-correct version of the above. */
340 skip_spaces (const char *chp)
344 while (*chp && ISSPACE (*chp))
349 /* See documentation in common-utils.h. */
352 skip_to_space (const char *chp)
356 while (*chp && !ISSPACE (*chp))
361 /* See documentation in common-utils.h. */
364 skip_to_space (char *chp)
366 return (char *) skip_to_space ((const char *) chp);
369 /* See gdbsupport/common-utils.h. */
372 free_vector_argv (std::vector<char *> &v)
380 /* See gdbsupport/common-utils.h. */
383 align_up (ULONGEST v, int n)
385 /* Check that N is really a power of two. */
386 gdb_assert (n && (n & (n-1)) == 0);
387 return (v + n - 1) & -n;
390 /* See gdbsupport/common-utils.h. */
393 align_down (ULONGEST v, int n)
395 /* Check that N is really a power of two. */
396 gdb_assert (n && (n & (n-1)) == 0);
400 /* See gdbsupport/common-utils.h. */
405 if (a >= '0' && a <= '9')
407 else if (a >= 'a' && a <= 'f')
409 else if (a >= 'A' && a <= 'F')
412 error (_("Invalid hex digit %d"), a);
415 /* See gdbsupport/common-utils.h. */
418 hex2bin (const char *hex, gdb_byte *bin, int count)
422 for (i = 0; i < count; i++)
424 if (hex[0] == 0 || hex[1] == 0)
426 /* Hex string is short, or of uneven length.
427 Return the count that has been converted so far. */
430 *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
436 /* See gdbsupport/common-utils.h. */
439 hex2bin (const char *hex)
441 size_t bin_len = strlen (hex) / 2;
442 gdb::byte_vector bin (bin_len);
444 hex2bin (hex, bin.data (), bin_len);