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/*
* Copyright (c) 2011, Chris Johnsen <chris_johnsen@pobox.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <string.h> /* strlen, strcpy, strerror */
#include <stdarg.h> /* va_... */
#include <stdio.h> /* vfprintf */
#include <stdlib.h> /* malloc, exit, free */
#include <sys/errno.h> /* errno */
#include "msg.h"
void vfmsg(FILE *f,
const char *pre, const char *suf, const char *fmt,
va_list ap) {
int prelen = 0, fmtlen = 0, suflen = 0;
if (pre) prelen = strlen(pre);
if (fmt) fmtlen = strlen(fmt);
if (suf) suflen = strlen(suf);
char *newfmt = malloc(
prelen*2 + /* %-doubled pre */
fmtlen +
2 + /* ':' and SP */
suflen*2 + /* %-doubled suf */
2 /* NL and NUL */
);
if (!newfmt)
goto finish;
char *newfmt_end = newfmt;
if (prelen)
while(*pre)
if ((*newfmt_end++ = *pre++) == '%')
*newfmt_end++ = '%';
if (fmtlen) {
strcpy(newfmt_end, fmt);
newfmt_end += fmtlen;
}
if (suflen) {
*newfmt_end++ = ':';
*newfmt_end++ = ' ';
while (*suf)
if ((*newfmt_end++ = *suf++) == '%')
*newfmt_end++ = '%';
}
*newfmt_end++ = '\n';
*newfmt_end++ = '\0';
fmt = newfmt;
finish:
vfprintf(f, fmt, ap);
fflush(f);
if (newfmt)
free(newfmt);
}
FILE *msgout = NULL;
void vmsg(const char *pre, const char *suf, const char *fmt, va_list ap) {
vfmsg(msgout ? msgout : stderr, pre, suf, fmt, ap);
}
void msg(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vmsg(NULL, NULL, fmt, ap);
va_end(ap);
}
void warn(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vmsg("warning: ", NULL, fmt, ap);
va_end(ap);
}
void warn_errno(const char *fmt, ...) {
int err = errno; /* just in case it gets clobbered */
va_list ap;
va_start(ap, fmt);
vmsg("warning: ", strerror(err), fmt, ap);
va_end(ap);
errno = err;
}
void die(int ev, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vmsg("fatal: ", NULL, fmt, ap);
va_end(ap);
exit(ev);
}
void die_errno(int ev, const char *fmt, ...) {
int err = errno; /* just in case it gets clobbered */
va_list ap;
va_start(ap, fmt);
vmsg("fatal: ", strerror(err), fmt, ap);
va_end(ap);
exit(ev);
}
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