154 lines
3.6 KiB
C
154 lines
3.6 KiB
C
/* Shared general utility routines for GDB, the GNU debugger.
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Copyright (C) 1986-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "common-defs.h"
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/* The xmalloc() (libiberty.h) family of memory management routines.
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These are like the ISO-C malloc() family except that they implement
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consistent semantics and guard against typical memory management
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problems. */
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/* NOTE: These are declared using PTR to ensure consistency with
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"libiberty.h". xfree() is GDB local. */
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PTR /* ARI: PTR */
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xmalloc (size_t size)
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{
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void *val;
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/* See libiberty/xmalloc.c. This function need's to match that's
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semantics. It never returns NULL. */
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if (size == 0)
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size = 1;
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val = malloc (size); /* ARI: malloc */
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if (val == NULL)
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malloc_failure (size);
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return val;
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}
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PTR /* ARI: PTR */
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xrealloc (PTR ptr, size_t size) /* ARI: PTR */
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{
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void *val;
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/* See libiberty/xmalloc.c. This function need's to match that's
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semantics. It never returns NULL. */
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if (size == 0)
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size = 1;
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if (ptr != NULL)
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val = realloc (ptr, size); /* ARI: realloc */
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else
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val = malloc (size); /* ARI: malloc */
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if (val == NULL)
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malloc_failure (size);
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return val;
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}
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PTR /* ARI: PTR */
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xcalloc (size_t number, size_t size)
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{
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void *mem;
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/* See libiberty/xmalloc.c. This function need's to match that's
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semantics. It never returns NULL. */
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if (number == 0 || size == 0)
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{
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number = 1;
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size = 1;
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}
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mem = calloc (number, size); /* ARI: xcalloc */
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if (mem == NULL)
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malloc_failure (number * size);
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return mem;
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}
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void *
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xzalloc (size_t size)
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{
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return xcalloc (1, size);
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}
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void
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xfree (void *ptr)
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{
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if (ptr != NULL)
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free (ptr); /* ARI: free */
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}
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/* Like asprintf/vasprintf but get an internal_error if the call
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fails. */
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char *
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xstrprintf (const char *format, ...)
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{
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char *ret;
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va_list args;
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va_start (args, format);
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ret = xstrvprintf (format, args);
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va_end (args);
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return ret;
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}
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char *
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xstrvprintf (const char *format, va_list ap)
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{
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char *ret = NULL;
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int status = vasprintf (&ret, format, ap);
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/* NULL is returned when there was a memory allocation problem, or
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any other error (for instance, a bad format string). A negative
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status (the printed length) with a non-NULL buffer should never
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happen, but just to be sure. */
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if (ret == NULL || status < 0)
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internal_error (__FILE__, __LINE__, _("vasprintf call failed"));
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return ret;
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}
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int
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xsnprintf (char *str, size_t size, const char *format, ...)
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{
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va_list args;
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int ret;
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va_start (args, format);
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ret = vsnprintf (str, size, format, args);
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gdb_assert (ret < size);
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va_end (args);
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return ret;
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}
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char *
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savestring (const char *ptr, size_t len)
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{
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char *p = (char *) xmalloc (len + 1);
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memcpy (p, ptr, len);
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p[len] = 0;
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return p;
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}
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