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Annotation of src/usr.bin/rcs/xmalloc.c, Revision 1.2

1.2     ! ray         1: /* $OpenBSD: xmalloc.c,v 1.1 2006/04/26 02:55:13 joris 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:
                     16: #include "includes.h"
                     17:
                     18: #include "xmalloc.h"
                     19:
                     20: void *
                     21: xmalloc(size_t size)
                     22: {
                     23:        void *ptr;
                     24:
                     25:        if (size == 0)
                     26:                errx(1, "xmalloc: zero size");
                     27:        ptr = malloc(size);
                     28:        if (ptr == NULL)
                     29:                errx(1,
                     30:                    "xmalloc: out of memory (allocating %lu bytes)",
                     31:                    (u_long) size);
                     32:        return ptr;
                     33: }
                     34:
                     35: void *
                     36: xcalloc(size_t nmemb, size_t size)
                     37: {
                     38:        void *ptr;
                     39:
                     40:        if (size == 0 || nmemb == 0)
                     41:                errx(1, "xcalloc: zero size");
                     42:        if (SIZE_T_MAX / nmemb < size)
                     43:                errx(1, "xcalloc: nmemb * size > SIZE_T_MAX");
                     44:        ptr = calloc(nmemb, size);
                     45:        if (ptr == NULL)
                     46:                errx(1, "xcalloc: out of memory (allocating %lu bytes)",
                     47:                    (u_long)(size * nmemb));
                     48:        return ptr;
                     49: }
                     50:
                     51: void *
                     52: xrealloc(void *ptr, size_t nmemb, size_t size)
                     53: {
                     54:        void *new_ptr;
                     55:        size_t new_size = nmemb * size;
                     56:
                     57:        if (new_size == 0)
                     58:                errx(1, "xrealloc: zero size");
                     59:        if (SIZE_T_MAX / nmemb < size)
                     60:                errx(1, "xrealloc: nmemb * size > SIZE_T_MAX");
                     61:        if (ptr == NULL)
                     62:                new_ptr = malloc(new_size);
                     63:        else
                     64:                new_ptr = realloc(ptr, new_size);
                     65:        if (new_ptr == NULL)
                     66:                errx(1, "xrealloc: out of memory (new_size %lu bytes)",
                     67:                    (u_long) new_size);
                     68:        return new_ptr;
                     69: }
                     70:
                     71: void
                     72: xfree(void *ptr)
                     73: {
                     74:        if (ptr == NULL)
                     75:                errx(1, "xfree: NULL pointer given as argument");
                     76:        free(ptr);
                     77: }
                     78:
                     79: char *
                     80: xstrdup(const char *str)
                     81: {
                     82:        size_t len;
                     83:        char *cp;
                     84:
                     85:        len = strlen(str) + 1;
                     86:        cp = xmalloc(len);
1.2     ! ray        87:        if (strlcpy(cp, str, len) >= len)
        !            88:                errx(1, "xstrdup: string truncated");
1.1       joris      89:        return cp;
                     90: }
                     91:
                     92: int
                     93: xasprintf(char **ret, const char *fmt, ...)
                     94: {
                     95:        va_list ap;
                     96:        int i;
                     97:
                     98:        va_start(ap, fmt);
                     99:        i = vasprintf(ret, fmt, ap);
                    100:        va_end(ap);
                    101:
                    102:        if (i < 0 || *ret == NULL)
                    103:                errx(1, "xasprintf: could not allocate memory");
                    104:
                    105:        return (i);
                    106: }