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78 lines
1.2 KiB
78 lines
1.2 KiB
#define _POSIX_C_SOURCE 200809l
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <err.h>
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#include <errno.h>
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#include <stdarg.h>
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#include "xalloc.h"
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#define GUESS 240U
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void *xmalloc(size_t n)
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{
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void *p = malloc(n);
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if (!p)
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err(errno, NULL);
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return p;
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}
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void *xcalloc(size_t n, size_t s)
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{
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if (!n || !s)
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err(EXIT_FAILURE, "calloc: invalid argument");
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void *p = calloc(n, s);
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if (!p)
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err(errno, NULL);
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return p;
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}
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void *xrealloc(void *p, size_t n)
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{
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void *r = realloc(p, n);
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if (!r && n)
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err(errno, NULL);
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return r;
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}
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char *xstrdup(const char *s)
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{
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char *r = strdup(s);
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if (!r)
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err(errno, NULL);
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return r;
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}
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int xasprintf(char **s, const char *fmt, ...)
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{
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int ret;
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va_list ap;
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va_start(ap, fmt);
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ret = xvasprintf(s, fmt, ap);
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va_end(ap);
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return ret;
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}
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int xvasprintf(char **s, const char *fmt, va_list ap)
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{
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va_list ap2;
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char *a;
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unsigned int l=GUESS;
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if (!(a=malloc(GUESS))) return -1;
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va_copy(ap2, ap);
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l=vsnprintf(a, GUESS, fmt, ap2);
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va_end(ap2);
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if (l<GUESS) {
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char *b = xrealloc(a, l+1U);
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*s = b ? b : a;
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return l;
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}
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free(a);
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if (!(*s=xmalloc(l+1U))) return -1;
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return vsnprintf(*s, l+1U, fmt, ap);
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}
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