7fd680c983
Variable length arrays are supported by C99, but having it denoted as "1" confused the compiler and is not defined. Note that because we don't get the inferred NULL terminator, we have to increase the malloc size by one.
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
|
|
* SPDX-License-Identifier: ISC
|
|
*
|
|
* Copyright (c) 2016-2018 Todd C. Miller <Todd.Miller@sudo.ws>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
/*
|
|
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
|
|
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "sudo_compat.h"
|
|
#include "sudo_debug.h"
|
|
#include "sudo_util.h"
|
|
|
|
/* Trivial reference-counted strings. */
|
|
struct rcstr {
|
|
int refcnt;
|
|
char str[];
|
|
};
|
|
|
|
/*
|
|
* Allocate a reference-counted string and copy src to it.
|
|
* Returns the newly-created string with a refcnt of 1.
|
|
*/
|
|
char *
|
|
sudo_rcstr_dup(const char *src)
|
|
{
|
|
size_t len = strlen(src);
|
|
char *dst;
|
|
debug_decl(sudo_rcstr_dup, SUDO_DEBUG_UTIL);
|
|
|
|
dst = sudo_rcstr_alloc(len);
|
|
if (dst != NULL) {
|
|
memcpy(dst, src, len);
|
|
dst[len] = '\0';
|
|
}
|
|
debug_return_ptr(dst);
|
|
}
|
|
|
|
char *
|
|
sudo_rcstr_alloc(size_t len)
|
|
{
|
|
struct rcstr *rcs;
|
|
debug_decl(sudo_rcstr_dup, SUDO_DEBUG_UTIL);
|
|
|
|
rcs = malloc(sizeof(struct rcstr) + len + 1);
|
|
if (rcs == NULL)
|
|
return NULL;
|
|
|
|
rcs->refcnt = 1;
|
|
rcs->str[0] = '\0';
|
|
/* cppcheck-suppress memleak */
|
|
debug_return_ptr(rcs->str); // -V773
|
|
}
|
|
|
|
char *
|
|
sudo_rcstr_addref(const char *s)
|
|
{
|
|
struct rcstr *rcs;
|
|
debug_decl(sudo_rcstr_dup, SUDO_DEBUG_UTIL);
|
|
|
|
if (s == NULL)
|
|
debug_return_ptr(NULL);
|
|
|
|
rcs = __containerof((const void *)s, struct rcstr, str);
|
|
rcs->refcnt++;
|
|
debug_return_ptr(rcs->str);
|
|
}
|
|
|
|
void
|
|
sudo_rcstr_delref(const char *s)
|
|
{
|
|
struct rcstr *rcs;
|
|
debug_decl(sudo_rcstr_dup, SUDO_DEBUG_UTIL);
|
|
|
|
if (s != NULL) {
|
|
rcs = __containerof((const void *)s, struct rcstr, str);
|
|
if (--rcs->refcnt == 0) {
|
|
rcs->str[0] = '\0';
|
|
free(rcs);
|
|
}
|
|
}
|
|
debug_return;
|
|
}
|