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#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include "dat.h"
const char *progname;
void
v()
{
}
static void
vwarnx(const char *err, const char *fmt, va_list args)
{
fprintf(stderr, "%s: ", progname);
if (fmt) {
vfprintf(stderr, fmt, args);
if (err) fprintf(stderr, ": %s", err);
}
fputc('\n', stderr);
}
void
warn(const char *fmt, ...)
{
char *err = strerror(errno); /* must be done first thing */
va_list args;
va_start(args, fmt);
vwarnx(err, fmt, args);
va_end(args);
}
void
warnx(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vwarnx(NULL, fmt, args);
va_end(args);
}
char*
fmtalloc(char *fmt, ...)
{
int n;
char *buf;
va_list ap;
// find out how much space is needed
va_start(ap, fmt);
n = vsnprintf(0, 0, fmt, ap) + 1; // include space for trailing NUL
va_end(ap);
buf = malloc(n);
if (buf) {
va_start(ap, fmt);
vsnprintf(buf, n, fmt, ap);
va_end(ap);
}
return buf;
}
// Zalloc allocates n bytes of zeroed memory and
// returns a pointer to it.
// If insufficient memory is available, zalloc returns 0.
void*
zalloc(int n)
{
void *p;
p = malloc(n);
if (p) {
memset(p, 0, n);
}
return p;
}