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/* $Id: agerror.c,v 1.3 2009/06/03 01:10:51 ellson Exp $ $Revision: 1.3 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2004 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
#include <stdio.h>
#include <cghdr.h>
agerrlevel_t agerrno; /* Last error */
static agerrlevel_t agerrlevel = AGWARN; /* Report errors >= agerrlevel */
static int agerrcnt;
static long aglast; /* Last message */
static FILE *agerrout; /* Message file */
void agseterr(agerrlevel_t lvl)
{
agerrlevel = lvl;
}
char *aglasterr()
{
long endpos;
long len;
char *buf;
if (!agerrout)
return 0;
fflush(agerrout);
endpos = ftell(agerrout);
len = endpos - aglast;
buf = malloc(len + 1);
fseek(agerrout, aglast, SEEK_SET);
fread(buf, sizeof(char), len, agerrout);
buf[len] = '\0';
fseek(agerrout, endpos, SEEK_SET);
return buf;
}
static int agerr_va(agerrlevel_t level, char *fmt, va_list args)
{
agerrlevel_t lvl;
lvl = (level == AGPREV ? agerrno : (level == AGMAX) ? AGERR : level);
agerrcnt++;
agerrno = lvl;
if (lvl >= agerrlevel) {
if (level != AGPREV)
fprintf(stderr, "%s: ",
(level == AGERR) ? "Error" : "Warning");
vfprintf(stderr, fmt, args);
va_end(args);
return 0;
}
if (!agerrout) {
agerrout = tmpfile();
if (!agerrout)
return 1;
}
if (level != AGPREV)
aglast = ftell(agerrout);
vfprintf(agerrout, fmt, args);
va_end(args);
return 0;
}
int agerr(agerrlevel_t level, char *fmt, ...)
{
va_list args;
va_start(args, fmt);
return agerr_va(level, fmt, args);
}
void agerrorf(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
agerr_va(AGERR, fmt, args);
}
void agwarningf(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
agerr_va(AGWARN, fmt, args);
}
int agerrors() { return agerrcnt; }
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