128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/*
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* util.c - useful functions header
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*
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* Copyright © 2007 Julien Danjou <julien@danjou.info>
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* Copyright © 2006 Pierre Habouzit <madcoder@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef AWESOME_MEM_H
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#define AWESOME_MEM_H
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#include <string.h>
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#include <stdlib.h>
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#include "config.h"
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#define ssizeof(foo) (ssize_t)sizeof(foo)
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#define countof(foo) (ssizeof(foo) / ssizeof(foo[0]))
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#define p_new(type, count) ((type *)xmalloc(sizeof(type) * (count)))
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#define p_clear(p, count) ((void)memset((p), 0, sizeof(*(p)) * (count)))
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#define p_realloc(pp, count) xrealloc((void*)(pp) sizeof(**(pp) * (count)))
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#define p_dup(p, count) xmemdup((p), sizeof(*(p)) * (count))
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#ifdef __GNUC__
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#define p_delete(mem_pp) \
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do { \
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typeof(**(mem_pp)) **__ptr = (mem_pp); \
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free(*__ptr); \
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*__ptr = NULL; \
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} while(0)
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#else
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#define p_delete(mem_p) \
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do { \
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void *__ptr = (mem_p); \
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free(*__ptr); \
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*(void **)__ptr = NULL; \
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} while (0)
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#endif
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static inline void * __attribute__ ((malloc)) xmalloc(ssize_t size)
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{
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void *ptr;
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if(size <= 0)
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return NULL;
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ptr = calloc(1, size);
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if(!ptr)
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abort();
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return ptr;
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}
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static inline void
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xrealloc(void **ptr, ssize_t newsize)
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{
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if(newsize <= 0)
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p_delete(ptr);
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else
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{
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*ptr = realloc(*ptr, newsize);
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if(!*ptr)
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abort();
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}
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}
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static inline void *xmemdup(const void *src, ssize_t size)
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{
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return memcpy(xmalloc(size), src, size);
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}
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/** \brief \c NULL resistant strlen.
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*
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* Unlinke it's libc sibling, a_strlen returns a ssize_t, and supports its
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* argument beeing NULL.
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*
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* \param[in] s the string.
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* \return the string length (or 0 if \c s is \c NULL).
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*/
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static inline ssize_t a_strlen(const char *s)
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{
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return s ? strlen(s) : 0;
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}
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/** \brief \c NULL resistant strdup.
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*
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* the a_strdup() function returns a pointer to a new string, which is a
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* duplicate of \c s. Memory should be freed using p_delete().
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*
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* \warning when s is \c "", it returns NULL !
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*
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* \param[in] s the string to duplicate.
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* \return a pointer to the duplicated string.
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*/
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static inline char *a_strdup(const char *s)
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{
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ssize_t len = a_strlen(s);
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return len ? p_dup(s, len + 1) : NULL;
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}
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void die(const char *, ...) __attribute__ ((noreturn)) __attribute__ ((format(printf, 1, 2)));
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void eprint(const char *, ...) __attribute__ ((noreturn)) __attribute__ ((format(printf, 1, 2)));
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void uicb_spawn(Display *, int, DC *, awesome_config *, const char *);
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Bool xgettextprop(Display *, Window, Atom, char *, unsigned int);
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double compute_new_value_from_arg(const char *, double);
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#endif
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