71393027f7de3214af23515fcf2c9695501a79fb
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
);
177 /* See documentation in common-utils.h. */
180 string_vprintf (const char* fmt
, va_list args
)
186 size
= vsnprintf (NULL
, 0, fmt
, vp
);
189 std::string
str (size
, '\0');
191 /* C++11 and later guarantee std::string uses contiguous memory and
192 always includes the terminating '\0'. */
193 vsprintf (&str
[0], fmt
, args
);
199 /* See documentation in common-utils.h. */
202 string_appendf (std::string
&str
, const char *fmt
, ...)
207 string_vappendf (str
, fmt
, vp
);
212 /* See documentation in common-utils.h. */
215 string_vappendf (std::string
&str
, const char *fmt
, va_list args
)
221 grow_size
= vsnprintf (NULL
, 0, fmt
, vp
);
224 size_t curr_size
= str
.size ();
225 str
.resize (curr_size
+ grow_size
);
227 /* C++11 and later guarantee std::string uses contiguous memory and
228 always includes the terminating '\0'. */
229 vsprintf (&str
[curr_size
], fmt
, args
);
233 savestring (const char *ptr
, size_t len
)
235 char *p
= (char *) xmalloc (len
+ 1);
237 memcpy (p
, ptr
, len
);
242 /* The bit offset of the highest byte in a ULONGEST, for overflow
245 #define HIGH_BYTE_POSN ((sizeof (ULONGEST) - 1) * HOST_CHAR_BIT)
247 /* True (non-zero) iff DIGIT is a valid digit in radix BASE,
248 where 2 <= BASE <= 36. */
251 is_digit_in_base (unsigned char digit
, int base
)
253 if (!isalnum (digit
))
256 return (isdigit (digit
) && digit
< base
+ '0');
258 return (isdigit (digit
) || tolower (digit
) < base
- 10 + 'a');
262 digit_to_int (unsigned char c
)
267 return tolower (c
) - 'a' + 10;
270 /* As for strtoul, but for ULONGEST results. */
273 strtoulst (const char *num
, const char **trailer
, int base
)
275 unsigned int high_part
;
280 /* Skip leading whitespace. */
281 while (isspace (num
[i
]))
284 /* Handle prefixes. */
287 else if (num
[i
] == '-')
293 if (base
== 0 || base
== 16)
295 if (num
[i
] == '0' && (num
[i
+ 1] == 'x' || num
[i
+ 1] == 'X'))
303 if (base
== 0 && num
[i
] == '0')
309 if (base
< 2 || base
> 36)
315 result
= high_part
= 0;
316 for (; is_digit_in_base (num
[i
], base
); i
+= 1)
318 result
= result
* base
+ digit_to_int (num
[i
]);
319 high_part
= high_part
* base
+ (unsigned int) (result
>> HIGH_BYTE_POSN
);
320 result
&= ((ULONGEST
) 1 << HIGH_BYTE_POSN
) - 1;
321 if (high_part
> 0xff)
324 result
= ~ (ULONGEST
) 0;
334 result
= result
+ ((ULONGEST
) high_part
<< HIGH_BYTE_POSN
);
341 /* See documentation in common-utils.h. */
344 skip_spaces (char *chp
)
348 while (*chp
&& isspace (*chp
))
353 /* A const-correct version of the above. */
356 skip_spaces (const char *chp
)
360 while (*chp
&& isspace (*chp
))
365 /* See documentation in common-utils.h. */
368 skip_to_space (const char *chp
)
372 while (*chp
&& !isspace (*chp
))
377 /* See documentation in common-utils.h. */
380 skip_to_space (char *chp
)
382 return (char *) skip_to_space ((const char *) chp
);
385 /* See common/common-utils.h. */
388 free_vector_argv (std::vector
<char *> &v
)
396 /* See common/common-utils.h. */
399 stringify_argv (const std::vector
<char *> &args
)
403 if (!args
.empty () && args
[0] != NULL
)
412 /* Erase the last whitespace. */
413 ret
.erase (ret
.end () - 1);
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