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#include <assert.h>
#include <stdlib.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "util.h"
/*
* Return an allocated memory area.
*/
void *
xmalloc(size_t size)
{
void *ptr;
assert(size > 0);
if ((ptr = malloc(size)) == NULL)
err(1, NULL);
return ptr;
}
/*
* Resize an allocated memory area.
*/
void *
xrealloc(void *ptr, size_t size)
{
void *newptr;
assert(ptr != NULL);
assert(size > 0);
if ((newptr = realloc(ptr, size)) == NULL)
err(1, NULL);
return newptr;
}
/*
* 4.4BSD err(), warn() functions reimplementation.
*/
void
err(int status, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
verr(status, fmt, ap);
va_end(ap);
}
void
verr(int status, const char *fmt, va_list ap)
{
int olderrno = errno;
fprintf(stderr, "csubst: ");
if (fmt != NULL) {
vfprintf(stderr, fmt, ap);
fprintf(stderr, ": ");
}
fprintf(stderr, "%s\n", strerror(olderrno));
exit(status);
}
void
errx(int status, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
verrx(status, fmt, ap);
va_end(ap);
}
void
verrx(int status, const char *fmt, va_list ap)
{
fprintf(stderr, "csubst: ");
if (fmt != NULL)
vfprintf(stderr, fmt, ap);
fputc('\n', stderr);
exit(status);
}
void
warn(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vwarn(fmt, ap);
va_end(ap);
}
void
vwarn(const char *fmt, va_list ap)
{
int olderrno = errno;
fprintf(stderr, "csubst: ");
if (fmt != NULL) {
vfprintf(stderr, fmt, ap);
fprintf(stderr, ": ");
}
fprintf(stderr, "%s\n", strerror(olderrno));
}
void
warnx(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vwarnx(fmt, ap);
va_end(ap);
}
void
vwarnx(const char *fmt, va_list ap)
{
fprintf(stderr, "csubst: ");
if (fmt != NULL)
vfprintf(stderr, fmt, ap);
fputc('\n', stderr);
}
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