1
  
2
  
3
  
4
  
5
  
6
  
7
  
8
  
9
  
10
  
11
  
12
  
13
  
14
  
15
  
16
  
17
  
18
  
19
  
20
  
21
  
22
  
23
  
24
  
25
  
26
  
27
  
28
  
29
  
30
  
31
  
32
  
33
  
34
  
35
  
36
  
37
  
38
  
39
  
40
  
41
  
42
  
43
  
44
  
45
  
46
  
47
  
48
  
49
  
50
  
51
  
52
  
53
  
54
  
55
  
56
  
57
  
58
  
59
  
60
  
61
  
62
  
63
  
64
  
65
  
66
  
67
  
68
  
69
  
70
  
71
  
72
  
73
  
74
  
75
  
76
  
77
  
78
  
79
  
80
  
81
  
82
  
83
  
84
  
85
  
86
  
87
  
88
  
89
  
90
  
91
  
92
  
93
  
94
  
95
  
96
  
97
  
98
  
99
  
100
  
101
  
102
  
103
  
104
  
105
  
106
  
107
  
108
  
109
  
110
  
111
  
112
  
113
  
114
  
115
  
116
  
117
  
118
  
119
  
120
  
121
  
122
  
123
  
124
  
125
  
126
  
127
  
128
  
129
  
130
  
131
  
132
  
133
  
134
  
135
  
136
  
137
  
/* 
|| This file is part of Pike. For copyright information see COPYRIGHT. 
|| Pike is distributed under GPL, LGPL and MPL. See the file COPYING 
|| for more information. 
*/ 
 
#ifndef MACROS_H 
#define MACROS_H 
 
#include "global.h" 
 
#ifdef HAVE_SYS_PARAM_H 
#include <sys/param.h> 
#endif 
 
#include "pike_memory.h" 
 
#define PTR_TO_INT(PTR) ((size_t) ((char *) (PTR) - (char *) NULL)) 
 
#if __GNUC__ >= 4 
#  define OFFSETOF(T,X) __builtin_offsetof(struct T,X) 
#  define ALIGNOF(X) __alignof__(X) 
#else 
#  define OFFSETOF(T, X) PTR_TO_INT(& (((struct T *)NULL)->X)) 
#  define ALIGNOF(X) OFFSETOF({ char ignored_; X fooo_;}, fooo_) 
#endif 
 
#define BASEOF(ptr, str_type, field) \ 
   ((struct str_type *)((char*)ptr - OFFSETOF(str_type, field))) 
 
#define NELEM(a) (sizeof (a) / sizeof ((a)[0])) 
#define ALLOC_STRUCT(X) ( (struct X *)xalloc(sizeof(struct X)) ) 
 
#define MINIMUM(X,Y) ((X)<(Y)?(X):(Y)) 
#define MAXIMUM(X,Y) ((X)>(Y)?(X):(Y)) 
 
 
PMOD_EXPORT extern const char Pike_is8bitalnum_vector[]; 
#define is8bitalnum(X)        (Pike_is8bitalnum_vector[((unsigned)(X))&0xff] == '1') 
   
#define isidchar(X) is8bitalnum(X) 
 
#ifndef HAVE_ISGRAPH 
#define isgraph(X)  (ispunct(X) || isupper(X) || islower(X) || isdigit(X)) 
#endif /* !HAVE_ISGRAPH */ 
 
 
 
#define DO_ALIGN(X,Y) (((size_t)(X)+((Y)-1)) & ~((Y)-1)) 
#define CONSTANT_STRLEN(X) (sizeof(X) - sizeof("")) 
 
#define SET_NEXT_AND_FREE(p,free_item) do{    \ 
  next=p->next;                                 \ 
  while(p->refs == 1 && (next=p->next))         \ 
  {                                             \ 
    add_ref(next);                              \ 
    free_item(p);                               \ 
    p=next;                                     \ 
  }                                             \ 
  free_item(p);                                 \ 
}while(0) 
 
#if __GNUC__ > 2 
/* FIXME: Add real test for this. 
 
   It has been around since 1999 in gcc, but also exists in many other 
   compilers. 
 */ 
#define UNLIKELY(X) __builtin_expect( (X), 0 ) 
#else 
#define UNLIKELY(X) X 
#endif 
 
/* This variant never leaves p pointing at a deallocated block, as the 
 * one above can do. I.e. it frees a ref to the item p points at, and 
 * sets p to the same or next item with references, or sets it to 
 * zero. */ 
/* how can SET_NEXT_AND_FREE leave *next* pointing to a deallocated block? 
 * -Hubbe 
 */ 
/* Afaik it doesn't, but it leaves no value that is usable for the 
 * purposes this macro was made for. /mast */ 
#define FREE_AND_GET_REFERENCED(p, item_type, free_item) do {         \ 
  item_type *next;                                                      \ 
  while (1) {                                                           \ 
    if (p->refs > 1) {                                                  \ 
      free_item(p);                                                     \ 
      break;                                                            \ 
    }                                                                   \ 
    if (!(next = p->next)) {                                            \ 
      free_item(p);                                                     \ 
      p = 0;                                                            \ 
      break;                                                            \ 
    }                                                                   \ 
    add_ref(next);                                                      \ 
    free_item(p);                                                       \ 
    p = next;                                                           \ 
  }                                                                     \ 
} while (0) 
 
#define DOUBLELINK(first_object, o) do {      \ 
  debug_malloc_touch(o);                        \ 
  o->next=first_object;                         \ 
  o->prev=0;                                    \ 
  if(first_object) first_object->prev=o;        \ 
  first_object=o;                               \ 
}while(0) 
 
#define DOUBLEUNLINK(first_object,o) do{      \ 
  debug_malloc_touch(o);                        \ 
  if(o->prev) {                                 \ 
    o->prev->next=o->next;                      \ 
  }else {                                       \ 
    DO_IF_DEBUG(                                \ 
      if(first_object != o) {                   \ 
        describe(o);                            \ 
        Pike_fatal("Linked in wrong list!\n");  \ 
      }                                         \ 
    )                                           \ 
    first_object=o->next;                       \ 
  }                                             \ 
                                                \ 
  if(o->next) o->next->prev=o->prev;            \ 
}while(0) 
 
#define PIKE_XCONCAT(X,Y)     PIKE_CONCAT(X,Y) 
#define PIKE_XCONCAT3(X,Y,Z)        PIKE_CONCAT(X,Y,Z) 
#define PIKE_XCONCAT4(X,Y,Z,Q)      PIKE_CONCAT(X,Y,Z,Q) 
 
/* Useful to get a literal comma in an argument to a macro. */ 
#define COMMA , 
 
/* Necessary to pass an empty argument to a macro for some preprocessors. */ 
#define NOTHING 
#endif