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/* Ratpoison.
* Copyright (C) 2000, 2001, 2002, 2003, 2004 Shawn Betts <sabetts@vcn.bc.ca>
*
* This file is part of ratpoison.
*
* ratpoison 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, or (at your option)
* any later version.
*
* ratpoison 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 software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*/
#include "ratpoison.h"
#include <ctype.h>
void
fatal (const char *msg)
{
fprintf (stderr, "ratpoison: %s", msg);
abort ();
}
void *
xmalloc (size_t size)
{
void *value;
value = malloc (size);
if (value == NULL)
fatal ("Virtual memory exhausted");
return value;
}
void *
xrealloc (void *ptr, size_t size)
{
void *value;
value = realloc (ptr, size);
if (value == NULL)
fatal ("Virtual memory exhausted");
return value;
}
char *
xstrdup (const char *s)
{
char *value;
value = strdup (s);
if (value == NULL)
fatal ("Virtual memory exhausted");
return value;
}
/* Return a new string based on fmt. */
char *
xvsprintf (char *fmt, va_list ap)
{
int size, nchars;
char *buffer;
va_list ap_copy;
/* A reasonable starting value. */
size = strlen (fmt) + 1;
buffer = xmalloc (size);
while (1)
{
#if defined(va_copy)
va_copy (ap_copy, ap);
#elif defined(__va_copy)
__va_copy (ap_copy, ap);
#else
/* If there is no copy macro then this MAY work. On some systems
this could fail because va_list is a pointer so assigning one
to the other as below wouldn't make a copy of the data, but
just the pointer to the data. */
ap_copy = ap;
#endif
nchars = vsnprintf (buffer, size, fmt, ap_copy);
#if defined(va_copy) || defined(__va_copy)
va_end (ap_copy);
#endif
if (nchars > -1 && nchars < size)
return buffer;
else if (nchars > -1)
size = nchars + 1;
/* c99 says -1 is an error other than truncation,
* which thus will not go away with a larger buffer.
* To support older system but not making errors fatal
* (ratpoison will abort when trying to get too much memory otherwise),
* try to increase a bit but not too much: */
else if (size < MAX_LEGACY_SNPRINTF_SIZE)
size *= 2;
else
{
free(buffer);
break;
}
/* Resize the buffer and try again. */
buffer = xrealloc (buffer, size);
}
return xstrdup("<FAILURE>");
}
/* Return a new string based on fmt. */
char *
xsprintf (char *fmt, ...)
{
char *buffer;
va_list ap;
va_start (ap, fmt);
buffer = xvsprintf (fmt, ap);
va_end (ap);
return buffer;
}
/* strtok but do it for whitespace and be locale compliant. */
char *
strtok_ws (char *s)
{
char *nonws;
static char *last = NULL;
if (s != NULL)
last = s;
else if (last == NULL)
{
PRINT_ERROR (("strtok_ws() called but not initalized, this is a *BUG*\n"));
abort();
}
/* skip to first non-whitespace char. */
while (*last && isspace ((unsigned char)*last))
last++;
/* If we reached the end of the string here then there is no more
data. */
if (*last == '\0')
return NULL;
/* Now skip to the end of the data. */
nonws = last;
while (*last && !isspace ((unsigned char)*last))
last++;
if (*last)
{
*last = '\0';
last++;
}
return nonws;
}
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