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Copy pathutil.c
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186 lines (167 loc) · 4.8 KB
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/*
* util.c - useful functions
*
* Copyright © 2007-2008 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"
/** Print error and exit with EXIT_FAILURE code
*/
void
_eprint(int line, const char *fct, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "E: awesome: %s:%d: ", fct, line);
vfprintf(stderr, fmt, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
/** Print error message on stderr
*/
void
_warn(int line, const char *fct, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "W: awesome: %s:%d: ", fct, line);
vfprintf(stderr, fmt, ap);
va_end(ap);
}
/** Compute a value from a string containing
* an absolute or a relative number. If relative,
* add it to current_value.
* \param arg the string with the number
* \param current_value value to add the number if it's relative
* \return new value
*/
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 name_func_link_t list
* \param funcname Function name
* \param list Function and name link list
* \return function pointer
*/
void *
name_func_lookup(const char *funcname, const name_func_link_t *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;
}
Position
position_get_from_str(const char *pos)
{
if(!a_strncmp(pos, "top", 3))
return Top;
else if(!a_strncmp(pos, "bottom", 6))
return Bottom;
else if(!a_strncmp(pos, "right", 5))
return Right;
else if(!a_strncmp(pos, "left", 4))
return Left;
else if(!a_strncmp(pos, "auto", 4))
return Auto;
return Off;
}
/** \brief safe limited strdup.
*
* Copies at most min(<tt>n-1</tt>, \c l) characters from \c src into a newly
* allocated buffer, always adding a final \c \\0, and returns that buffer.
*
* \param[in] src source string.
* \param[in] l maximum number of chars to copy.
*
* \return a newly allocated buffer containing the first \c l chars of \c src.
*/
char* a_strndup(const char* src, ssize_t l)
{
char* _tmpStr = p_new(char, l + 1);
if (_tmpStr)
{
a_strncpy(_tmpStr, l + 1, src, l);
_tmpStr[l] = 0;
}
return _tmpStr;
}
/** \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