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1
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2 /* vim:set shiftwidth=4 ts=8: */
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3
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4 /**********************************************************
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5 * This software is part of the graphviz package *
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6 * http://www.graphviz.org/ *
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7 * *
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8 * Copyright (c) 1994-2004 AT&T Corp. *
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9 * and is licensed under the *
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10 * Common Public License, Version 1.0 *
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11 * by AT&T Corp. *
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12 * *
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13 * Information and Software Systems Research *
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14 * AT&T Research, Florham Park NJ *
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15 **********************************************************/
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16
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17 /* Common header used by both clients and plugins */
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18
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19 #ifndef GVCEXT_H
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20 #define GVCEXT_H
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21
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22 #ifdef __cplusplus
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23 extern "C" {
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24 #endif
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25
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26 /*
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27 * Define an apis array of name strings using an enumerated api_t as index.
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28 * The enumerated type is defined here. The apis array is
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29 * inititialized in gvplugin.c by redefining ELEM and reinvoking APIS.
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30 */
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31 #define APIS ELEM(render) ELEM(layout) ELEM(textlayout) ELEM(device) ELEM(loadimage)
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32
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33 /*
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34 * Define api_t using names based on the plugin names with API_ prefixed.
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35 */
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36 #define ELEM(x) API_##x,
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37 typedef enum { APIS _DUMMY_ELEM_=0 } api_t; /* API_render, API_layout, ... */
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38 /* Stupid but true: The sole purpose of "_DUMMY_ELEM_=0"
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39 * is to avoid a "," after the last element of the enum
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40 * because some compilers when using "-pedantic"
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41 * generate an error for about the dangling ","
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42 * but only if this header is used from a .cpp file!
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43 * Setting it to 0 makes sure that the enumeration
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44 * does not define an extra value. (It does however
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45 * define _DUMMY_ELEM_ as an enumeration symbol,
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46 * but its value duplicates that of the first
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47 * symbol in the enumeration - in this case "render".)
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48 */
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49
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50 /* One could wonder why trailing "," in:
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51 * int nums[]={1,2,3,};
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52 * is OK, but in:
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53 * typedef enum {a,b,c,} abc_t;
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54 * is not!!!
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55 */
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56 #undef ELEM
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57
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58 typedef struct GVJ_s GVJ_t;
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59 typedef struct GVC_s GVC_t;
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60
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61 typedef struct {
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62 const char *name;
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63 void* address;
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64 } lt_symlist_t;
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65
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66 typedef struct gvplugin_available_s gvplugin_available_t;
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67
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68 /*visual studio*/
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69 #ifdef WIN32_DLL
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70 #ifndef GVC_EXPORTS
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71 __declspec(dllimport) lt_symlist_t lt_preloaded_symbols[];
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72 #else
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73 __declspec(dllexport) lt_symlist_t lt_preloaded_symbols[];
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74 #endif
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75 #endif
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76 /*end visual studio*/
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77
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78
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79 #ifndef WIN32_DLL
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80 #if defined(GVDLL)
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81 __declspec(dllexport) lt_symlist_t lt_preloaded_symbols[];
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82 #else
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83 extern lt_symlist_t lt_preloaded_symbols[];
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84 #endif
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85 #endif
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86
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87
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88 #ifdef __cplusplus
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89 }
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90 #endif
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91
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92
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93
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94 #endif
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