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Annotation of src/usr.bin/rcs/xmalloc.c, Revision 1.6

1.6     ! deraadt     1: /* $OpenBSD: xmalloc.c,v 1.5 2014/09/27 15:16:36 otto Exp $ */
1.1       joris       2: /*
                      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).
                      8:  *
                      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".
                     14:  */
                     15:
1.3       xsa        16: #include <err.h>
                     17: #include <limits.h>
                     18: #include <stdarg.h>
                     19: #include <stdio.h>
                     20: #include <stdlib.h>
                     21: #include <string.h>
1.1       joris      22:
                     23: #include "xmalloc.h"
                     24:
                     25: void *
                     26: xmalloc(size_t size)
                     27: {
                     28:        void *ptr;
                     29:
                     30:        if (size == 0)
                     31:                errx(1, "xmalloc: zero size");
                     32:        ptr = malloc(size);
                     33:        if (ptr == NULL)
                     34:                errx(1,
1.5       otto       35:                    "xmalloc: out of memory (allocating %zu bytes)",
                     36:                    size);
1.1       joris      37:        return ptr;
                     38: }
                     39:
                     40: void *
                     41: xcalloc(size_t nmemb, size_t size)
                     42: {
                     43:        void *ptr;
                     44:
                     45:        if (size == 0 || nmemb == 0)
                     46:                errx(1, "xcalloc: zero size");
1.4       ray        47:        if (SIZE_MAX / nmemb < size)
                     48:                errx(1, "xcalloc: nmemb * size > SIZE_MAX");
1.1       joris      49:        ptr = calloc(nmemb, size);
                     50:        if (ptr == NULL)
1.5       otto       51:                errx(1, "xcalloc: out of memory (allocating %zu bytes)",
                     52:                    (size * nmemb));
1.1       joris      53:        return ptr;
                     54: }
                     55:
                     56: void *
1.6     ! deraadt    57: xreallocarray(void *ptr, size_t nmemb, size_t size)
1.1       joris      58: {
                     59:        void *new_ptr;
                     60:
1.6     ! deraadt    61:        new_ptr = reallocarray(ptr, nmemb, size);
1.1       joris      62:        if (new_ptr == NULL)
1.5       otto       63:                errx(1, "xrealloc: out of memory (new_size %zu bytes)",
1.6     ! deraadt    64:                    nmemb * size);
1.1       joris      65:        return new_ptr;
                     66: }
                     67:
                     68: void
                     69: xfree(void *ptr)
                     70: {
                     71:        if (ptr == NULL)
                     72:                errx(1, "xfree: NULL pointer given as argument");
                     73:        free(ptr);
                     74: }
                     75:
                     76: char *
                     77: xstrdup(const char *str)
                     78: {
                     79:        size_t len;
                     80:        char *cp;
                     81:
                     82:        len = strlen(str) + 1;
                     83:        cp = xmalloc(len);
1.2       ray        84:        if (strlcpy(cp, str, len) >= len)
                     85:                errx(1, "xstrdup: string truncated");
1.1       joris      86:        return cp;
                     87: }
                     88:
                     89: int
                     90: xasprintf(char **ret, const char *fmt, ...)
                     91: {
                     92:        va_list ap;
                     93:        int i;
                     94:
                     95:        va_start(ap, fmt);
                     96:        i = vasprintf(ret, fmt, ap);
                     97:        va_end(ap);
                     98:
                     99:        if (i < 0 || *ret == NULL)
                    100:                errx(1, "xasprintf: could not allocate memory");
                    101:
                    102:        return (i);
                    103: }