Graphviz  2.41.20170921.2350
gvcext.h
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1 
2 /* vim:set shiftwidth=4 ts=8: */
3 
4 /*************************************************************************
5  * Copyright (c) 2011 AT&T Intellectual Property
6  * All rights reserved. This program and the accompanying materials
7  * are made available under the terms of the Eclipse Public License v1.0
8  * which accompanies this distribution, and is available at
9  * http://www.eclipse.org/legal/epl-v10.html
10  *
11  * Contributors: See CVS logs. Details at http://www.graphviz.org/
12  *************************************************************************/
13 
14 /* Common header used by both clients and plugins */
15 
16 #ifndef GVCEXT_H
17 #define GVCEXT_H
18 
19 #ifdef __cplusplus
20 extern "C" {
21 #endif
22 
23 /*
24  * Define an apis array of name strings using an enumerated api_t as index.
25  * The enumerated type is defined here. The apis array is
26  * inititialized in gvplugin.c by redefining ELEM and reinvoking APIS.
27  */
28 #define APIS ELEM(render) ELEM(layout) ELEM(textlayout) ELEM(device) ELEM(loadimage)
29 
30 /*
31  * Define api_t using names based on the plugin names with API_ prefixed.
32  */
33 #define ELEM(x) API_##x,
34  typedef enum { APIS _DUMMY_ELEM_=0 } api_t; /* API_render, API_layout, ... */
35  /* Stupid but true: The sole purpose of "_DUMMY_ELEM_=0"
36  * is to avoid a "," after the last element of the enum
37  * because some compilers when using "-pedantic"
38  * generate an error for about the dangling ","
39  * but only if this header is used from a .cpp file!
40  * Setting it to 0 makes sure that the enumeration
41  * does not define an extra value. (It does however
42  * define _DUMMY_ELEM_ as an enumeration symbol,
43  * but its value duplicates that of the first
44  * symbol in the enumeration - in this case "render".)
45  */
46 
47  /* One could wonder why trailing "," in:
48  * int nums[]={1,2,3,};
49  * is OK, but in:
50  * typedef enum {a,b,c,} abc_t;
51  * is not!!!
52  */
53 #undef ELEM
54 
55  typedef struct GVJ_s GVJ_t;
56  typedef struct GVG_s GVG_t;
57  typedef struct GVC_s GVC_t;
58 
59  typedef struct {
60  const char *name;
61  void* address;
62  } lt_symlist_t;
63 
65 
66 /*visual studio*/
67 #ifdef _WIN32
68 #ifndef GVC_EXPORTS
69 __declspec(dllimport) lt_symlist_t lt_preloaded_symbols[];
70 #else
71 //__declspec(dllexport) lt_symlist_t lt_preloaded_symbols[];
72 #if !defined(LTDL_H)
73 lt_symlist_t lt_preloaded_symbols[];
74 #endif
75 #endif
76 #endif
77 /*end visual studio*/
78 
79 
80 #ifndef _WIN32
81 #if defined(GVDLL)
82  __declspec(dllexport) lt_symlist_t lt_preloaded_symbols[];
83 #else
84 #if !defined(LTDL_H)
85  extern lt_symlist_t lt_preloaded_symbols[];
86 #endif
87 #endif
88 #endif
89 
90 
91 #ifdef __cplusplus
92 }
93 #endif
94 
95 
96 
97 #endif
#define APIS
Definition: gvcext.h:28
const char * name
Definition: gvcext.h:60
api_t
Definition: gvcext.h:34
Definition: gvcjob.h:271
lt_symlist_t lt_preloaded_symbols[]
Definition: dot_builtins.c:36
Definition: gvcint.h:70
Definition: gvcint.h:59
void * address
Definition: gvcext.h:61