mirror of
https://github.com/awesomeWM/awesome
synced 2024-11-05 20:26:09 +01:00
139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
/*
|
|
* util.c - useful functions
|
|
*
|
|
* Copyright © 2007 Julien Danjou <julien@danjou.info>
|
|
* Copyright © 2006 Pierre Habouzit <madcoder@debian.org>
|
|
*
|
|
* This program 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.
|
|
*
|
|
* This program 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 program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
#include <limits.h>
|
|
|
|
#include "util.h"
|
|
|
|
void
|
|
eprint(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
fprintf(stderr, "awesome: ");
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
void
|
|
warn(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
fprintf(stderr, "awesome: ");
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
double
|
|
compute_new_value_from_arg(const char *arg, double current_value)
|
|
{
|
|
double delta;
|
|
|
|
if(arg && sscanf(arg, "%lf", &delta) == 1)
|
|
{
|
|
if(arg[0] == '+' || arg[0] == '-')
|
|
current_value += delta;
|
|
else
|
|
current_value = delta;
|
|
}
|
|
|
|
return current_value;
|
|
}
|
|
|
|
|
|
/** Lookup for a function pointer from its name
|
|
* in the given NameFuncLink list
|
|
* \param funcname Function name
|
|
* \param list Function and name link list
|
|
* \return function pointer
|
|
*/
|
|
void *
|
|
name_func_lookup(const char *funcname, const NameFuncLink * list)
|
|
{
|
|
int i;
|
|
|
|
if(funcname && list)
|
|
for(i = 0; list[i].name; i++)
|
|
if(!a_strcmp(funcname, list[i].name))
|
|
return list[i].func;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/** \brief safe limited strcpy.
|
|
*
|
|
* Copies at most min(<tt>n-1</tt>, \c l) characters from \c src into \c dst,
|
|
* always adding a final \c \\0 in \c dst.
|
|
*
|
|
* \param[in] dst destination buffer.
|
|
* \param[in] n size of the buffer. Negative sizes are allowed.
|
|
* \param[in] src source string.
|
|
* \param[in] l maximum number of chars to copy.
|
|
*
|
|
* \return minimum of \c src \e length and \c l.
|
|
*/
|
|
ssize_t a_strncpy(char *dst, ssize_t n, const char *src, ssize_t l)
|
|
{
|
|
ssize_t len = MIN(a_strlen(src), l);
|
|
|
|
if (n > 0)
|
|
{
|
|
ssize_t dlen = MIN(n - 1, len);
|
|
memcpy(dst, src, dlen);
|
|
dst[dlen] = '\0';
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
/** \brief safe strcpy.
|
|
*
|
|
* Copies at most <tt>n-1</tt> characters from \c src into \c dst, always
|
|
* adding a final \c \\0 in \c dst.
|
|
*
|
|
* \param[in] dst destination buffer.
|
|
* \param[in] n size of the buffer. Negative sizes are allowed.
|
|
* \param[in] src source string.
|
|
* \return \c src \e length. If this value is \>= \c n then the copy was
|
|
* truncated.
|
|
*/
|
|
ssize_t a_strcpy(char *dst, ssize_t n, const char *src)
|
|
{
|
|
ssize_t len = a_strlen(src);
|
|
|
|
if (n > 0)
|
|
{
|
|
ssize_t dlen = MIN(n - 1, len);
|
|
memcpy(dst, src, dlen);
|
|
dst[dlen] = '\0';
|
|
}
|
|
|
|
return len;
|
|
}
|
|
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
|