err.c

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/*
 
  Copyright (C) 2010 Alex Andreotti <alex.andreotti@gmail.com>
 
  This file is part of chmc.
 
  chmc 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.
 
  chmc 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 chmc.  If not, see <http://www.gnu.org/licenses/>.
 
*/
#include "err.h"
 
#include <stdarg.h>
#include <assert.h>
 
struct chmcErr
{
    int code;
    char msg[CHMC_ERRMAXLEN+1];
};
 
static struct chmcErr chmc_err = {
    CHMC_NOERR,
    '\0',
};
 
void chmcerr_clean(void) {
    chmc_err.code = CHMC_NOERR;
    chmc_err.msg[0] = '\0';
}
 
int chmcerr_code(void) {
    return chmc_err.code;
}
 
const char *chmcerr_message( void ) {
    return chmc_err.msg;
}
 
void chmcerr_set(int code, const char *fmt, ...)
{
    int len;
    va_list ap;
 
    chmc_err.code = code;
 
    va_start(ap, fmt);
 
    len = vsnprintf(chmc_err.msg, CHMC_ERRMAXLEN, fmt, ap);
    if (len == CHMC_ERRMAXLEN)
        chmc_err.msg[CHMC_ERRMAXLEN] = '\0';
 
    assert(len <= CHMC_ERRMAXLEN);
 
    va_end(ap);
}