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#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "eprintf.h"
char *pname;
/* eprintf: print error and exit, a trailing : in fmt prints strerror(errno) */
void eprintf(const char *fmt, ...)
{
int errnum = errno;
va_list va;
assert(fmt);
if (progname() != NULL)
fprintf(stderr, "%s: ", progname());
va_start(va, fmt);
vfprintf(stderr, fmt, va);
va_end(va);
if (fmt[0] != '\0' && fmt[strlen(fmt) - 1] == ':')
fprintf(stderr, " %s", strerror(errnum));
fputc('\n', stderr);
exit(EXIT_FAILURE);
}
/* weprintf: print warning, a trailing : in fmt prints strerror(errno) */
void weprintf(const char *fmt, ...)
{
int errnum = errno;
va_list va;
assert(fmt);
if (progname() != NULL)
fprintf(stderr, "%s: ", progname());
va_start(va, fmt);
vfprintf(stderr, fmt, va);
va_end(va);
if (fmt[0] != '\0' && fmt[strlen(fmt) - 1] == ':')
fprintf(stderr, " %s", strerror(errnum));
fputc('\n', stderr);
}
/* estrdup: attempt to strdup a string or exit on error */
char *estrdup(const char *s)
{
size_t len;
char *dup;
assert(s);
len = strlen(s);
if (len == SIZE_MAX)
eprintf("estrdup(\"%.20s\") failed: Too long", s);
dup = malloc(len + 1);
if (dup == NULL)
eprintf("estrdup(\"%.20s\") failed:", s);
strcpy(dup, s);
return dup;
}
/* emalloc: attempt to allocate memory or exit on error */
void *emalloc(size_t n)
{
void *p;
p = malloc(n);
if (p == NULL)
eprintf("emalloc(%zu) failed:", n);
return p;
}
/* ecalloc: attempt to allocate memory or exit on error */
void *ecalloc(size_t nmemb, size_t size)
{
void *p;
p = calloc(nmemb, size);
if (p == NULL)
eprintf("ecalloc(%zu, %zu) failed:", nmemb, size);
return p;
}
/* erealloc: attempt to reallocate memory or exit on error */
void *erealloc(void *p, size_t n)
{
void *r;
r = realloc(p, n);
if (r == NULL)
eprintf("erealloc(%p, %zu) failed:", p, n);
return r;
}
/* progname: retrieve stored name of program */
char *progname(void)
{
return pname;
}
/* setprogname: set stored name of program */
void setprogname(const char *s)
{
if (pname != NULL) {
weprintf("setprogname(\"%.20s\") called more than once", s);
return;
}
pname = estrdup(s);
}
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