/**
* slibc — Yet another C library
* Copyright © 2015 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <slibc-error.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
/**
* Print a description of an error, and where the error occurred.
* This function is capable of printed the full call-stack.
*
* It is not recommended to used this function direction.
* Use the macros in <slibc-error.h> instead.
*
* This is a slibc extension.
*
* @param progname The name of the program, `NULL` to use `program_invocation_name`.
* @param filename The source code file where the error occurred.
* @param linenum The line in the source code where the error occurred.
* @param function The function in the source code where the error occurred.
* @param error_code Pointer the variable that stores the error code, will zeroed.
* @param error_string Textual description of the error code, `NULL` if `strerror` should be used.
* This parameter is unused if `error_code` is zero.
* @param format Formatting-string for a description of the action that failed. `NULL` if
* no description other than the location and `error_string` should be printed.
* @param ... Formatting-arguments for `format`.
*/
void slibc_perror(const char* progname, const char* filename, int linenum, const char* function,
int* error_code, const char* error_string, const char* format, ...)
{
int tty = isatty(STDERR_FILENO);
va_list args;
if (progname == NULL)
progname = program_invocation_name;
if (*error_code)
{
if (error_string == NULL)
error_string = strerror(*error_code);
fflush(stdout);
fprintf(stderr, "%(\033[0;1;31m%)%s%(\033[21m%): %s%(\033[0m%)\n",
tty, progname, tty, error_string, tty);
}
fprintf(stderr, " at \033[1;34m%s\033[0m (\033[35m%s\033[0m:\033[32m%i\033[0m)",
function, filename, linenum);
if (format != NULL)
{
fprintf(stderr, "\n ");
va_start(args, format);
vfprintf(stderr, format, args);
va_end(args);
}
fprintf(stderr, "\n");
*error_code = 0;
}
