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Annotation of src/usr.bin/ssh/xmalloc.c, Revision 1.17

1.1       deraadt     1: /*
1.5       deraadt     2:  * Author: Tatu Ylonen <ylo@cs.hut.fi>
                      3:  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
                      4:  *                    All rights reserved
                      5:  * Versions of malloc and friends that check their results, and never return
                      6:  * failure (they call fatal if they encounter an error).
1.11      stevesk     7:  *
1.8       deraadt     8:  * As far as I am concerned, the code I have written for this software
                      9:  * can be used freely for any purpose.  Any derived versions of this
                     10:  * software must be clearly marked as such, and if the derived work is
                     11:  * incompatible with the protocol description in the RFC file, it must be
                     12:  * called by a name other than "ssh" or "Secure Shell".
1.5       deraadt    13:  */
1.1       deraadt    14:
                     15: #include "includes.h"
                     16:
1.9       markus     17: #include "xmalloc.h"
                     18: #include "log.h"
1.1       deraadt    19:
1.4       markus     20: void *
                     21: xmalloc(size_t size)
1.1       deraadt    22: {
1.12      deraadt    23:        void *ptr;
                     24:
                     25:        if (size == 0)
                     26:                fatal("xmalloc: zero size");
                     27:        ptr = malloc(size);
1.4       markus     28:        if (ptr == NULL)
1.14      itojun     29:                fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size);
1.4       markus     30:        return ptr;
1.1       deraadt    31: }
                     32:
1.4       markus     33: void *
                     34: xrealloc(void *ptr, size_t new_size)
1.1       deraadt    35: {
1.4       markus     36:        void *new_ptr;
1.1       deraadt    37:
1.12      deraadt    38:        if (new_size == 0)
1.13      markus     39:                fatal("xrealloc: zero size");
1.4       markus     40:        if (ptr == NULL)
1.15      deraadt    41:                new_ptr = malloc(new_size);
                     42:        else
                     43:                new_ptr = realloc(ptr, new_size);
1.4       markus     44:        if (new_ptr == NULL)
1.14      itojun     45:                fatal("xrealloc: out of memory (new_size %lu bytes)", (u_long) new_size);
1.4       markus     46:        return new_ptr;
1.1       deraadt    47: }
                     48:
1.6       markus     49: void
1.4       markus     50: xfree(void *ptr)
1.1       deraadt    51: {
1.4       markus     52:        if (ptr == NULL)
                     53:                fatal("xfree: NULL pointer given as argument");
                     54:        free(ptr);
1.1       deraadt    55: }
                     56:
1.4       markus     57: char *
                     58: xstrdup(const char *str)
1.1       deraadt    59: {
1.16      stevesk    60:        size_t len;
1.12      deraadt    61:        char *cp;
1.2       deraadt    62:
1.16      stevesk    63:        len = strlen(str) + 1;
1.12      deraadt    64:        cp = xmalloc(len);
1.4       markus     65:        strlcpy(cp, str, len);
                     66:        return cp;
1.1       deraadt    67: }