| 1 | #include "cll1.h" |
| 2 | |
| 3 | /* This is example of advanced C<<1 object oriented features... */ |
| 4 | |
| 5 | def_interface(Shape, Interface) |
| 6 | { |
| 7 | void method(draw) (Shape self); |
| 8 | void method(move) (Shape self, int x, int y); |
| 9 | str method(desc) (Shape self); |
| 10 | void method(rename) (Shape self, str name); |
| 11 | void method(reset) (Shape self, int x1, int y1, int x2, int y2, int x3, int y3); |
| 12 | float method(area) (Shape self); |
| 13 | int count; |
| 14 | }; |
| 15 | |
| 16 | /* We intentionaly define heterogenous objects, which share only the interface |
| 17 | binding. Not only we can use different order of variables, and different |
| 18 | names - but we can even store these data on remote systems, etc. */ |
| 19 | |
| 20 | def_mem(Tri) |
| 21 | { |
| 22 | interface(Interface); |
| 23 | int x1, y1, x2, y2, x3, y3; |
| 24 | str name; |
| 25 | }; |
| 26 | |
| 27 | def_mem(Rect) |
| 28 | { |
| 29 | interface(Interface); |
| 30 | str desc; |
| 31 | int x1, y1, x2, y2; |
| 32 | }; |
| 33 | |
| 34 | def_mem(Circ) |
| 35 | { |
| 36 | interface(Interface); |
| 37 | int x1, y1; |
| 38 | str comment; |
| 39 | int r; |
| 40 | }; |
| 41 | |
| 42 | def_community(Shape, Interface); |
| 43 | |
| 44 | /* Note: interface(Interface); has to be at first position in all objects asociated in community */ |
| 45 | |
| 46 | def_mem(Object_list) |
| 47 | { |
| 48 | Shape object; |
| 49 | list(Object_list); |
| 50 | }; |
| 51 | |
| 52 | |
| 53 | /* implementation of methods */ |
| 54 | |
| 55 | void drawTri(Shape community) |
| 56 | { |
| 57 | I_am(self, Tri); |
| 58 | |
| 59 | printf("Drawing %s: %d,%d - %d,%d - %d,%d .\n", |
| 60 | self->name, self->x1, self->y1, self->x2, self->y2, self->x3, self->y3); |
| 61 | }; |
| 62 | |
| 63 | void drawRect(Shape community) |
| 64 | { |
| 65 | I_am(self, Rect); |
| 66 | |
| 67 | printf("Drawing %s: %d,%d - %d,%d .\n", |
| 68 | self->desc, self->x1, self->y1, self->x2, self->y2); |
| 69 | }; |
| 70 | |
| 71 | void drawCirc(Shape community) |
| 72 | { |
| 73 | I_am(self, Circ); |
| 74 | |
| 75 | printf("Drawing %s: %d,%d - r=%d .\n", |
| 76 | self->comment, self->x1, self->y1, self->r); |
| 77 | }; |
| 78 | |
| 79 | void moveTri(Shape community, int x, int y) |
| 80 | { |
| 81 | I_am(self, Tri); |
| 82 | |
| 83 | self->x1 += x; |
| 84 | self->y1 += y; |
| 85 | self->x2 += x; |
| 86 | self->y2 += y; |
| 87 | self->x3 += x; |
| 88 | self->y3 += y; |
| 89 | }; |
| 90 | |
| 91 | void moveRect(Shape community, int x, int y) |
| 92 | { |
| 93 | I_am(self, Rect); |
| 94 | |
| 95 | self->x1 += x; |
| 96 | self->y1 += y; |
| 97 | self->x2 += x; |
| 98 | self->y2 += y; |
| 99 | }; |
| 100 | |
| 101 | void moveCirc(Shape community, int x, int y) |
| 102 | { |
| 103 | I_am(self, Circ); |
| 104 | |
| 105 | self->x1 += x; |
| 106 | self->y1 += y; |
| 107 | }; |
| 108 | |
| 109 | str descTri(Shape community) |
| 110 | { |
| 111 | I_am(self, Tri); |
| 112 | |
| 113 | return self->name; |
| 114 | } |
| 115 | |
| 116 | str descRect(Shape community) |
| 117 | { |
| 118 | I_am(self, Rect); |
| 119 | |
| 120 | return self->desc; |
| 121 | } |
| 122 | |
| 123 | str descCirc(Shape community) |
| 124 | { |
| 125 | I_am(self, Circ); |
| 126 | |
| 127 | return self->comment; |
| 128 | } |
| 129 | |
| 130 | float calcAreaTri(Shape community) |
| 131 | { |
| 132 | I_am(self, Tri); |
| 133 | |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | float calcAreaRect(Shape community) |
| 138 | { |
| 139 | I_am(self, Rect); |
| 140 | |
| 141 | return (self->x2 - self->x1)*(self->y2 - self->y1); |
| 142 | } |
| 143 | |
| 144 | float calcAreaCirc(Shape community) |
| 145 | { |
| 146 | I_am(self, Circ); |
| 147 | |
| 148 | return PI * self->r * self->r; |
| 149 | } |
| 150 | |
| 151 | void setTri(Shape community, int x1, int y1, int x2, int y2, int x3, int y3) |
| 152 | { |
| 153 | I_am(self, Tri); |
| 154 | |
| 155 | self->x1 = x1; |
| 156 | self->y1 = y1; |
| 157 | self->x2 = x2; |
| 158 | self->y2 = y2; |
| 159 | self->x3 = x3; |
| 160 | self->y3 = y3; |
| 161 | } |
| 162 | |
| 163 | void setRect(Shape community, int x1, int y1, int x2, int y2, int dummy1, int dummy2) |
| 164 | { |
| 165 | I_am(self, Rect); |
| 166 | |
| 167 | self->x1 = x1; |
| 168 | self->y1 = y1; |
| 169 | self->x2 = x2; |
| 170 | self->y2 = y2; |
| 171 | } |
| 172 | |
| 173 | void setCirc(Shape community, int x1, int y1, int r, int dummy1, int dummy2, int dummy3) |
| 174 | { |
| 175 | I_am(self, Circ); |
| 176 | |
| 177 | self->x1 = x1; |
| 178 | self->y1 = y1; |
| 179 | self->r = r; |
| 180 | } |
| 181 | |
| 182 | void nameRect(Shape community, str name) |
| 183 | { |
| 184 | I_am(self, Rect); |
| 185 | |
| 186 | self->desc = name; |
| 187 | } |
| 188 | |
| 189 | /* Example of using object interface methods from inside constructor methods */ |
| 190 | |
| 191 | construct(Tri,Interface) (Tri self, int x1, int y1, int x2, int y2, int x3, int y3) |
| 192 | { |
| 193 | self->name = "TRIANGLE"; |
| 194 | interface_of(self)->count++; |
| 195 | _(reset, self, x1, y1, x2, y2, x3, y3); |
| 196 | |
| 197 | return self; |
| 198 | } |
| 199 | |
| 200 | construct(Rect,Interface) (Rect self, int x1, int y1, int x2, int y2) |
| 201 | { |
| 202 | self->desc = "rectangle"; |
| 203 | interface_of(self)->count++; |
| 204 | _(reset, self, x1, y1, x2, y2, 0, 0); |
| 205 | |
| 206 | return self; |
| 207 | } |
| 208 | |
| 209 | construct(Circ,Interface) (Circ self, int x1, int y1, int r) |
| 210 | { |
| 211 | self->comment = "Circle"; |
| 212 | interface_of(self)->count++; |
| 213 | _(reset, self, x1, y1, r, 0, 0, 0); |
| 214 | |
| 215 | return self; |
| 216 | } |
| 217 | |
| 218 | /* registration of implemented methods to three interfaces of the same type */ |
| 219 | |
| 220 | Interface triInterface(void) |
| 221 | { |
| 222 | Get_mem(this, Interface); |
| 223 | |
| 224 | this->draw = drawTri; |
| 225 | this->move = moveTri; |
| 226 | this->desc = descTri; |
| 227 | this->rename = NULL; |
| 228 | this->reset = setTri; |
| 229 | this->area = calcAreaTri; |
| 230 | this->count = 0; |
| 231 | |
| 232 | return this; |
| 233 | } |
| 234 | |
| 235 | Interface rectInterface(void) |
| 236 | { |
| 237 | Get_mem(this, Interface); |
| 238 | |
| 239 | this->draw = drawRect; |
| 240 | this->move = moveRect; |
| 241 | this->desc = descRect; |
| 242 | this->rename = nameRect; |
| 243 | this->reset = setRect; |
| 244 | this->area = calcAreaRect; |
| 245 | this->count = 0; |
| 246 | |
| 247 | return this; |
| 248 | } |
| 249 | |
| 250 | Interface circInterface(void) |
| 251 | { |
| 252 | Get_mem(this, Interface); |
| 253 | |
| 254 | this->draw = drawCirc; |
| 255 | this->move = moveCirc; |
| 256 | this->desc = descCirc; |
| 257 | this->rename = NULL; |
| 258 | this->reset = setCirc; |
| 259 | this->area = calcAreaCirc; |
| 260 | this->count = 0; |
| 261 | |
| 262 | return this; |
| 263 | } |
| 264 | |
| 265 | /* usage of objects inside C<<1 program */ |
| 266 | |
| 267 | program |
| 268 | { |
| 269 | Interface triangles = triInterface(); |
| 270 | Interface rectangles = rectInterface(); |
| 271 | Interface circles = circInterface(); |
| 272 | Object_list all = NULL, one; |
| 273 | |
| 274 | one = get_mem(Object_list); |
| 275 | one->object = get_obj_as(Shape, Rect, rectangles, 0, 10, 1, 11); |
| 276 | append(one, all); |
| 277 | |
| 278 | one = get_mem(Object_list); |
| 279 | one->object = get_obj_as(Shape, Tri, triangles, 0, 0, 0, 4, 3, 0); |
| 280 | append(one, all); |
| 281 | |
| 282 | one = get_mem(Object_list); |
| 283 | one->object = get_obj_as(Shape, Rect, rectangles, 10, 0, 11, 1); |
| 284 | append(one, all); |
| 285 | |
| 286 | one = get_mem(Object_list); |
| 287 | one->object = get_obj_as(Shape, Circ, circles, 0, 10, 1); |
| 288 | append(one, all); |
| 289 | |
| 290 | printf("We have created %d triangles, %d rectangles and %d circles:\n", |
| 291 | triangles->count, rectangles->count, circles->count); |
| 292 | |
| 293 | for_each(one, all) |
| 294 | { |
| 295 | _(draw, one->object); |
| 296 | printf("Area of this %s is %f (square pixels).\n", _(desc, one->object), _(area, one->object)); |
| 297 | printf("We have created %d instances of this type of object.\n", interface_of(one->object)->count); |
| 298 | |
| 299 | if(interface_of(one->object) == rectangles) |
| 300 | { |
| 301 | _(reset, one->object, 0, 0, 1, 1, 0, 0); |
| 302 | _(rename, one->object, "Renamed rectangle"); |
| 303 | } |
| 304 | else |
| 305 | { |
| 306 | _(move, one->object, 10, 10); |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | print("Rectangles were reset to new size and renamed, other objects were moved:"); |
| 311 | for_each(one, all) |
| 312 | { |
| 313 | _(draw, one->object); |
| 314 | } |
| 315 | } |