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 "common-utils.h"
22 #include "host-defs.h"
25 /* The xmalloc() (libiberty.h) family of memory management routines.
27 These are like the ISO-C malloc() family except that they implement
28 consistent semantics and guard against typical memory management
31 /* NOTE: These are declared using PTR to ensure consistency with
32 "libiberty.h". xfree() is GDB local. */
39 /* See libiberty/xmalloc.c. This function need's to match that's
40 semantics. It never returns NULL. */
44 val
= malloc (size
); /* ARI: malloc */
46 malloc_failure (size
);
52 xrealloc (PTR ptr
, size_t size
) /* ARI: PTR */
56 /* See libiberty/xmalloc.c. This function need's to match that's
57 semantics. It never returns NULL. */
62 val
= realloc (ptr
, size
); /* ARI: realloc */
64 val
= malloc (size
); /* ARI: malloc */
66 malloc_failure (size
);
72 xcalloc (size_t number
, size_t size
)
76 /* See libiberty/xmalloc.c. This function need's to match that's
77 semantics. It never returns NULL. */
78 if (number
== 0 || size
== 0)
84 mem
= calloc (number
, size
); /* ARI: xcalloc */
86 malloc_failure (number
* size
);
94 return xcalloc (1, size
);
101 free (ptr
); /* ARI: free */
105 xmalloc_failed (size_t size
)
107 malloc_failure (size
);
110 /* Like asprintf/vasprintf but get an internal_error if the call
114 xstrprintf (const char *format
, ...)
119 va_start (args
, format
);
120 ret
= xstrvprintf (format
, args
);
126 xstrvprintf (const char *format
, va_list ap
)
129 int status
= vasprintf (&ret
, format
, ap
);
131 /* NULL is returned when there was a memory allocation problem, or
132 any other error (for instance, a bad format string). A negative
133 status (the printed length) with a non-NULL buffer should never
134 happen, but just to be sure. */
135 if (ret
== NULL
|| status
< 0)
136 internal_error (__FILE__
, __LINE__
, _("vasprintf call failed"));
141 xsnprintf (char *str
, size_t size
, const char *format
, ...)
146 va_start (args
, format
);
147 ret
= vsnprintf (str
, size
, format
, args
);
148 gdb_assert (ret
< size
);
154 /* See documentation in common-utils.h. */
157 string_printf (const char* fmt
, ...)
163 size
= vsnprintf (NULL
, 0, fmt
, vp
);
166 std::string
str (size
, '\0');
168 /* C++11 and later guarantee std::string uses contiguous memory and
169 always includes the terminating '\0'. */
171 vsprintf (&str
[0], fmt
, vp
);
178 savestring (const char *ptr
, size_t len
)
180 char *p
= (char *) xmalloc (len
+ 1);
182 memcpy (p
, ptr
, len
);
187 /* The bit offset of the highest byte in a ULONGEST, for overflow
190 #define HIGH_BYTE_POSN ((sizeof (ULONGEST) - 1) * HOST_CHAR_BIT)
192 /* True (non-zero) iff DIGIT is a valid digit in radix BASE,
193 where 2 <= BASE <= 36. */
196 is_digit_in_base (unsigned char digit
, int base
)
198 if (!isalnum (digit
))
201 return (isdigit (digit
) && digit
< base
+ '0');
203 return (isdigit (digit
) || tolower (digit
) < base
- 10 + 'a');
207 digit_to_int (unsigned char c
)
212 return tolower (c
) - 'a' + 10;
215 /* As for strtoul, but for ULONGEST results. */
218 strtoulst (const char *num
, const char **trailer
, int base
)
220 unsigned int high_part
;
225 /* Skip leading whitespace. */
226 while (isspace (num
[i
]))
229 /* Handle prefixes. */
232 else if (num
[i
] == '-')
238 if (base
== 0 || base
== 16)
240 if (num
[i
] == '0' && (num
[i
+ 1] == 'x' || num
[i
+ 1] == 'X'))
248 if (base
== 0 && num
[i
] == '0')
254 if (base
< 2 || base
> 36)
260 result
= high_part
= 0;
261 for (; is_digit_in_base (num
[i
], base
); i
+= 1)
263 result
= result
* base
+ digit_to_int (num
[i
]);
264 high_part
= high_part
* base
+ (unsigned int) (result
>> HIGH_BYTE_POSN
);
265 result
&= ((ULONGEST
) 1 << HIGH_BYTE_POSN
) - 1;
266 if (high_part
> 0xff)
269 result
= ~ (ULONGEST
) 0;
279 result
= result
+ ((ULONGEST
) high_part
<< HIGH_BYTE_POSN
);
286 /* See documentation in common-utils.h. */
289 skip_spaces (char *chp
)
293 while (*chp
&& isspace (*chp
))
298 /* A const-correct version of the above. */
301 skip_spaces (const char *chp
)
305 while (*chp
&& isspace (*chp
))
310 /* See documentation in common-utils.h. */
313 skip_to_space (const char *chp
)
317 while (*chp
&& !isspace (*chp
))
322 /* See documentation in common-utils.h. */
325 skip_to_space (char *chp
)
327 return (char *) skip_to_space ((const char *) chp
);
330 /* See common/common-utils.h. */
333 free_vector_argv (std::vector
<char *> &v
)
341 /* See common/common-utils.h. */
344 stringify_argv (const std::vector
<char *> &args
)
348 if (!args
.empty () && args
[0] != NULL
)
357 /* Erase the last whitespace. */
358 ret
.erase (ret
.end () - 1);
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