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#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <error.h>
unsigned int error_message_count = 0;
int error_one_per_line = 0;
void (*error_print_progname)(void) = NULL;
void error(int status, int errnum, const char *format, ...) {
va_list args;
va_start(args, format);
error_message_count++;
fflush(stdout);
if(error_print_progname) {
error_print_progname();
} else {
fprintf(stderr, "%s: ", program_invocation_name);
}
vfprintf(stderr, format, args);
va_end(args);
if(errnum) {
fprintf(stderr, ": %s\n", strerror(errnum));
}
if(status) {
exit(status);
}
}
void error_at_line(int status, int errnum, const char *filename, unsigned int linenum, const char *format, ...) {
va_list args;
va_start(args, format);
static bool first_call = true;
static unsigned int last_line = 0;
if(!(last_line == linenum && error_one_per_line && !first_call)) {
first_call = false;
last_line = linenum;
error_message_count++;
fflush(stdout);
if(error_print_progname) {
error_print_progname();
} else {
fprintf(stderr, "%s:", program_invocation_name);
}
fprintf(stderr, "%s:%u: ", filename, linenum);
vfprintf(stderr, format, args);
if(errnum) {
fprintf(stderr, ": %s\n", strerror(errnum));
}
}
va_end(args);
if(status) {
exit(status);
}
}
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