1 /* Shared general utility routines for GDB, the GNU debugger.
3 Copyright (C) 1986-2019 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"
28 return xcalloc (1, size);
31 /* Like asprintf/vasprintf but get an internal_error if the call
35 xstrprintf (const char *format, ...)
40 va_start (args, format);
41 ret = xstrvprintf (format, args);
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 (__FILE__, __LINE__, _("vasprintf call failed"));
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);
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);
120 /* See documentation in common-utils.h. */
123 string_appendf (std::string &str, const char *fmt, ...)
128 string_vappendf (str, fmt, vp);
133 /* See documentation in common-utils.h. */
136 string_vappendf (std::string &str, const char *fmt, va_list args)
142 grow_size = vsnprintf (NULL, 0, fmt, vp);
145 size_t curr_size = str.size ();
146 str.resize (curr_size + grow_size);
148 /* C++11 and later guarantee std::string uses contiguous memory and
149 always includes the terminating '\0'. */
150 vsprintf (&str[curr_size], fmt, args);
154 savestring (const char *ptr, size_t len)
156 char *p = (char *) xmalloc (len + 1);
158 memcpy (p, ptr, len);
163 /* The bit offset of the highest byte in a ULONGEST, for overflow
166 #define HIGH_BYTE_POSN ((sizeof (ULONGEST) - 1) * HOST_CHAR_BIT)
168 /* True (non-zero) iff DIGIT is a valid digit in radix BASE,
169 where 2 <= BASE <= 36. */
172 is_digit_in_base (unsigned char digit, int base)
174 if (!isalnum (digit))
177 return (isdigit (digit) && digit < base + '0');
179 return (isdigit (digit) || tolower (digit) < base - 10 + 'a');
183 digit_to_int (unsigned char c)
188 return tolower (c) - 'a' + 10;
191 /* As for strtoul, but for ULONGEST results. */
194 strtoulst (const char *num, const char **trailer, int base)
196 unsigned int high_part;
201 /* Skip leading whitespace. */
202 while (isspace (num[i]))
205 /* Handle prefixes. */
208 else if (num[i] == '-')
214 if (base == 0 || base == 16)
216 if (num[i] == '0' && (num[i + 1] == 'x' || num[i + 1] == 'X'))
224 if (base == 0 && num[i] == '0')
230 if (base < 2 || base > 36)
236 result = high_part = 0;
237 for (; is_digit_in_base (num[i], base); i += 1)
239 result = result * base + digit_to_int (num[i]);
240 high_part = high_part * base + (unsigned int) (result >> HIGH_BYTE_POSN);
241 result &= ((ULONGEST) 1 << HIGH_BYTE_POSN) - 1;
242 if (high_part > 0xff)
245 result = ~ (ULONGEST) 0;
255 result = result + ((ULONGEST) high_part << HIGH_BYTE_POSN);
262 /* See documentation in common-utils.h. */
265 skip_spaces (char *chp)
269 while (*chp && isspace (*chp))
274 /* A const-correct version of the above. */
277 skip_spaces (const char *chp)
281 while (*chp && isspace (*chp))
286 /* See documentation in common-utils.h. */
289 skip_to_space (const char *chp)
293 while (*chp && !isspace (*chp))
298 /* See documentation in common-utils.h. */
301 skip_to_space (char *chp)
303 return (char *) skip_to_space ((const char *) chp);
306 /* See common/common-utils.h. */
309 free_vector_argv (std::vector<char *> &v)
317 /* See common/common-utils.h. */
320 stringify_argv (const std::vector<char *> &args)
324 if (!args.empty () && args[0] != NULL)
333 /* Erase the last whitespace. */
334 ret.erase (ret.end () - 1);
340 /* See common/common-utils.h. */
343 align_up (ULONGEST v, int n)
345 /* Check that N is really a power of two. */
346 gdb_assert (n && (n & (n-1)) == 0);
347 return (v + n - 1) & -n;
350 /* See common/common-utils.h. */
353 align_down (ULONGEST v, int n)
355 /* Check that N is really a power of two. */
356 gdb_assert (n && (n & (n-1)) == 0);