root/libswish3/trunk/src/libswish3/error.c

/*
 * This file is part of libswish3
 * Copyright (C) 2007 Peter Karman
 *
 *  libswish3 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  libswish3 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 libswish3; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

/* error handling based on Swish-e ver2 error.c */

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <err.h>
#include <string.h>
#include <libxml/globals.h>

#include "libswish3.h"

extern int SWISH_DEBUG;
extern int SWISH_WARNINGS;

static FILE *error_handle = NULL;

void
swish_set_error_handle(
    FILE * where
)
{
    error_handle = where;
}

void
swish_croak(
    const char *file,
    int line,
    const char *func,
    char *msgfmt,
    ...
)
{
    va_list args;

    if (!error_handle)
        error_handle = stderr;

    va_start(args, msgfmt);
    fprintf(error_handle, "Swish ERROR %s:%d %s: ", file, line, func);
    vfprintf(error_handle, msgfmt, args);
    fprintf(error_handle, "\n");
    va_end(args);

    if (!errno)
        errno = 1;

    exit(errno);
}

void
swish_warn(
    const char *file,
    int line,
    const char *func,
    char *msgfmt,
    ...
)
{
    va_list args;

    if (!error_handle)
        error_handle = stderr;
        
    if (!SWISH_WARNINGS)
        return;

    va_start(args, msgfmt);
    fprintf(error_handle, "Swish WARNING %s:%d %s: ", file, line, func);
    vfprintf(error_handle, msgfmt, args);
    fprintf(error_handle, "\n");
    va_end(args);
}

void
swish_debug(
    const char *file,
    int line,
    const char *func,
    char *msgfmt,
    ...
)
{
    va_list args;

    if (!error_handle)
        error_handle = stderr;

    va_start(args, msgfmt);
    fprintf(error_handle, "Swish DEBUG %s:%d %s: ", file, line, func);
    vfprintf(error_handle, msgfmt, args);
    fprintf(error_handle, "\n");
    va_end(args);
}