Return to xmalloc.c CVS log

Up to [local] / src / usr.bin / ssh

Annotation of src/usr.bin/ssh/xmalloc.c, Revision 1.25

1.25    ! stevesk     1: /* $OpenBSD: xmalloc.c,v 1.24 2006/07/26 02:35:17 stevesk Exp $ */
1.1       deraadt     2: /*
1.5       deraadt     3:  * Author: Tatu Ylonen <ylo@cs.hut.fi>
                      4:  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
                      5:  *                    All rights reserved
                      6:  * Versions of malloc and friends that check their results, and never return
                      7:  * failure (they call fatal if they encounter an error).
1.11      stevesk     8:  *
1.8       deraadt     9:  * As far as I am concerned, the code I have written for this software
                     10:  * can be used freely for any purpose.  Any derived versions of this
                     11:  * software must be clearly marked as such, and if the derived work is
                     12:  * incompatible with the protocol description in the RFC file, it must be
                     13:  * called by a name other than "ssh" or "Secure Shell".
1.5       deraadt    14:  */
1.1       deraadt    15:
                     16: #include "includes.h"
1.24      stevesk    17:
                     18: #include <sys/param.h>
1.22      stevesk    19:
                     20: #include <stdarg.h>
1.25    ! stevesk    21: #include <stdlib.h>
1.23      stevesk    22: #include <string.h>
1.1       deraadt    23:
1.9       markus     24: #include "xmalloc.h"
                     25: #include "log.h"
1.1       deraadt    26:
1.4       markus     27: void *
                     28: xmalloc(size_t size)
1.1       deraadt    29: {
1.12      deraadt    30:        void *ptr;
                     31:
                     32:        if (size == 0)
                     33:                fatal("xmalloc: zero size");
                     34:        ptr = malloc(size);
1.4       markus     35:        if (ptr == NULL)
1.14      itojun     36:                fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size);
1.4       markus     37:        return ptr;
1.1       deraadt    38: }
                     39:
1.4       markus     40: void *
1.18      djm        41: xcalloc(size_t nmemb, size_t size)
                     42: {
                     43:        void *ptr;
                     44:
                     45:        if (size == 0 || nmemb == 0)
                     46:                fatal("xcalloc: zero size");
1.21      deraadt    47:        if (SIZE_T_MAX / nmemb < size)
                     48:                fatal("xcalloc: nmemb * size > SIZE_T_MAX");
1.18      djm        49:        ptr = calloc(nmemb, size);
                     50:        if (ptr == NULL)
                     51:                fatal("xcalloc: out of memory (allocating %lu bytes)",
                     52:                    (u_long)(size * nmemb));
                     53:        return ptr;
                     54: }
                     55:
                     56: void *
1.19      djm        57: xrealloc(void *ptr, size_t nmemb, size_t size)
1.1       deraadt    58: {
1.4       markus     59:        void *new_ptr;
1.19      djm        60:        size_t new_size = nmemb * size;
1.1       deraadt    61:
1.12      deraadt    62:        if (new_size == 0)
1.13      markus     63:                fatal("xrealloc: zero size");
1.21      deraadt    64:        if (SIZE_T_MAX / nmemb < size)
                     65:                fatal("xrealloc: nmemb * size > SIZE_T_MAX");
1.4       markus     66:        if (ptr == NULL)
1.15      deraadt    67:                new_ptr = malloc(new_size);
                     68:        else
                     69:                new_ptr = realloc(ptr, new_size);
1.4       markus     70:        if (new_ptr == NULL)
1.19      djm        71:                fatal("xrealloc: out of memory (new_size %lu bytes)",
                     72:                    (u_long) new_size);
1.4       markus     73:        return new_ptr;
1.1       deraadt    74: }
                     75:
1.6       markus     76: void
1.4       markus     77: xfree(void *ptr)
1.1       deraadt    78: {
1.4       markus     79:        if (ptr == NULL)
                     80:                fatal("xfree: NULL pointer given as argument");
                     81:        free(ptr);
1.1       deraadt    82: }
                     83:
1.4       markus     84: char *
                     85: xstrdup(const char *str)
1.1       deraadt    86: {
1.16      stevesk    87:        size_t len;
1.12      deraadt    88:        char *cp;
1.2       deraadt    89:
1.16      stevesk    90:        len = strlen(str) + 1;
1.12      deraadt    91:        cp = xmalloc(len);
1.4       markus     92:        strlcpy(cp, str, len);
                     93:        return cp;
1.18      djm        94: }
                     95:
                     96: int
                     97: xasprintf(char **ret, const char *fmt, ...)
                     98: {
                     99:        va_list ap;
                    100:        int i;
                    101:
                    102:        va_start(ap, fmt);
                    103:        i = vasprintf(ret, fmt, ap);
                    104:        va_end(ap);
                    105:
                    106:        if (i < 0 || *ret == NULL)
                    107:                fatal("xasprintf: could not allocate memory");
                    108:
                    109:        return (i);
1.1       deraadt   110: }