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/*
* Copyright (C) 2015 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 OWNER 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 <error.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
unsigned int error_message_count = 0;
void (*error_print_progname)(void) = NULL;
int error_one_per_line = 0;
static void __error_head() {
++error_message_count;
if (error_print_progname != NULL) {
error_print_progname();
} else {
fflush(stdout);
fprintf(stderr, "%s:", getprogname());
}
}
static void __error_tail(int status, int error) {
if (error != 0) {
fprintf(stderr, ": %s", strerror(error));
}
putc('\n', stderr);
fflush(stderr);
if (status != 0) {
exit(status);
}
}
void error(int status, int error, const char* fmt, ...) {
__error_head();
putc(' ', stderr);
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
__error_tail(status, error);
}
void error_at_line(int status, int error, const char* file, unsigned int line, const char* fmt, ...) {
if (error_one_per_line) {
static const char* last_file;
static unsigned int last_line;
if (last_line == line && last_file != NULL && strcmp(last_file, file) == 0) {
return;
}
last_file = file;
last_line = line;
}
__error_head();
fprintf(stderr, "%s:%d: ", file, line);
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
__error_tail(status, error);
}
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