libbanshee/engine/util.h

   1 /*
   2  * Copyright (c) 2000-2001
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  */
  30
  31 #ifndef UTIL_H
  32 #define UTIL_H
  33
  34 #include <assert.h>
  35 #include <stdarg.h>
  36 #include <stdlib.h>
  37 #include <regions.h>
  38 #include <ansidecl.h>
  39 #include "compiler.h"
  40 #include "linkage.h"
  41 #include "bool.h"
  42
  43
  44 EXTERN_C_BEGIN
  45
  46 #ifdef HAVE_VARIADIC_MACROS
  47 #define fail(args...) __fail(__FILE__, __LINE__, __FUNCTION__, args)
  48 #else
  49 void fail(const char *fmt, ...);
  50 #endif
  51
  52 void __fail(const char *file, unsigned int line,
  53             const char *func, const char *fmt, ...) __attribute__ ((__noreturn__));
  54
  55
  56 /* insist(action) is like assert(action), but action may have
  57    side-effects */
  58 #ifdef NDEBUG
  59 # define insist(action)  (action)
  60 #else
  61 # define insist assert
  62 #endif
  63
  64 #ifdef NDEBUG
  65 # define insistnot(action)  (action)
  66 #else
  67 # define insistnot(action) assert(!(action))
  68 #endif
  69
  70 void failure(const char *message);
  71
  72 /* Concatenate 2 strings, allocating space in r for the result */
  73 char *rstrcat(region, const char *, const char *);
  74
  75 /* Concatenate n strings, allocating space in r for the result.  The
  76    last argument should be a null pointer. */
  77 char *rstrscat(region, ...);
  78
  79 /* Convert an integer to a string, storing the result in r */
  80 const char *inttostr(region r, int);
  81
  82 /* sprintf a string, allocating space in r for the result */
  83 char *rsprintf(region r, const char *fmt, ...);
  84 char *rvsprintf(region r, const char *fmt, va_list args);
  85
  86 /* Convert a pointer to an ascii string with leading 0x.  Re-uses
  87    internal buffer. */
  88 char *ptr_to_ascii(void *ptr);
  89
  90 /* Convert a pointer to an integer */
  91 long ptr_hash(void *ptr);
  92
  93 /* Return TRUE iff ptr1 == ptr2 */
  94 bool ptr_eq(void *ptr1, void *ptr2);
  95
  96 /* Return TRUE iff s1 == s2 */
  97 bool str_eq(const char *s1, const char *s2);
  98
  99 /* A total ordering on pointers.  Returns 0 if ptr1 = ptr2, a value <0
 100    if ptr1 < ptr2, or a value >0 if ptr1 > ptr2. */
 101 int ptr_cmp(const void *ptr1, const void *ptr2);
 102
 103 static inline int min(int a, int b) { if (a < b) return a; else return b; }
 104 static inline int max(int a, int b) { if (a < b) return b; else return a; }
 105 EXTERN_C_END
 106
 107 #endif