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      1 /*
      2  * malloc-like functions for system emulation.
      3  *
      4  * Copyright (c) 2006 Fabrice Bellard
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a copy
      7  * of this software and associated documentation files (the "Software"), to deal
      8  * in the Software without restriction, including without limitation the rights
      9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     10  * copies of the Software, and to permit persons to whom the Software is
     11  * furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     22  * THE SOFTWARE.
     23  */
     24 #include "qemu-common.h"
     25 #include <stdlib.h>
     26 
     27 static void *oom_check(void *ptr)
     28 {
     29     if (ptr == NULL) {
     30         abort();
     31     }
     32     return ptr;
     33 }
     34 
     35 void *get_mmap_addr(unsigned long size)
     36 {
     37     return NULL;
     38 }
     39 
     40 void qemu_free(void *ptr)
     41 {
     42     free(ptr);
     43 }
     44 
     45 void *qemu_malloc(size_t size)
     46 {
     47     if (!size) {
     48         abort();
     49     }
     50     return oom_check(malloc(size));
     51 }
     52 
     53 void *qemu_realloc(void *ptr, size_t size)
     54 {
     55     if (size) {
     56         return oom_check(realloc(ptr, size));
     57     } else {
     58         if (ptr) {
     59             return realloc(ptr, size);
     60         }
     61     }
     62     abort();
     63 }
     64 
     65 void *qemu_mallocz(size_t size)
     66 {
     67     void *ptr;
     68     ptr = qemu_malloc(size);
     69     memset(ptr, 0, size);
     70     return ptr;
     71 }
     72 
     73 char *qemu_strdup(const char *str)
     74 {
     75     char *ptr;
     76     size_t len = strlen(str);
     77     ptr = qemu_malloc(len + 1);
     78     memcpy(ptr, str, len + 1);
     79     return ptr;
     80 }
     81 
     82 char *qemu_strndup(const char *str, size_t size)
     83 {
     84     const char *end = memchr(str, 0, size);
     85     char *new;
     86 
     87     if (end) {
     88         size = end - str;
     89     }
     90 
     91     new = qemu_malloc(size + 1);
     92     new[size] = 0;
     93 
     94     return memcpy(new, str, size);
     95 }
     96