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#include <stdlib.h>

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#include <stdio.h>

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#include <stdarg.h>

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#include <string.h>

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#include <errno.h>

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#include "log.h"

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static void _generic_err_vargs (int use_stderr, const char *func, int perr, const char *fmt, va_list va) {

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    FILE *stream = use_stderr ? stderr : stdout;

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    if (func)

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        fprintf(stream, "%s: ", func);

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    vfprintf(stream, fmt, va);

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    if (perr)

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        fprintf(stream, ": %s\n", strerror(perr > 0 ? errno : -perr));

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    fprintf(stream, "\n");

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}

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void _generic_err (int use_stderr, const char *func, int perr, const char *fmt, ...) {

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    va_list va;

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    va_start(va, fmt);

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    _generic_err_vargs(use_stderr, func, perr, fmt, va);

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    va_end(va);

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}

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void _generic_err_exit (int use_stderr, const char *func, int perr, const char *fmt, ...) {

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    va_list va;

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    va_start(va, fmt);

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    _generic_err_vargs(use_stderr, func, perr, fmt, va);

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    va_end(va);

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    exit(EXIT_FAILURE);

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}

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