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#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
#include "gis.h"
/*
* Eric G. Miller egm2@jps.net
* Thu, 2 May 2002 17:51:54 -0700
*
*
* I've got a sort of cheat for asprintf. We can't use vsnprintf for the
* same reason we can't use snprintf ;-) Comments welcome (I'm not too
* sure tmpfile() is safe. It's apparently an anonymous file on my
* machine, as nothing shows up in /tmp or the current directory...)
*/
/* Make sure the macro doesn't impact our function, if it is defined */
#undef G_asprintf
/* We cheat by printing to a tempfile via vfprintf and then reading it
* * back in. Not the most efficient way, probably and tmpfile() is
* * not safe?
* */
int
G_asprintf (char **out, const char *fmt, ...)
{
va_list ap;
int ret_status = EOF;
int count = 0;
FILE *fp = NULL;
char *work = NULL;
assert (out != NULL && fmt != NULL);
va_start (ap, fmt);
if ((fp = tmpfile()))
{
count = vfprintf (fp, fmt, ap);
if (count >= 0)
{
work = calloc (count + 1, 1);
if (work != NULL)
{
rewind (fp);
ret_status = fread (work, 1, count, fp);
if (ret_status != count)
{
ret_status = EOF;
free (work);
work = NULL;
}
}
}
fclose (fp);
}
va_end (ap);
*out = work;
return ret_status;
}
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