| 1 | #include "cll1.h" |
| 2 | |
| 3 | /* This is example of advanced C<<1 object oriented features... */ |
| 4 | |
| 5 | def_type(Shape); |
| 6 | |
| 7 | def_mem(Interface) |
| 8 | { |
| 9 | void method(draw) (Shape self); |
| 10 | void method(move) (Shape self, int x, int y); |
| 11 | str method(desc) (Shape self); |
| 12 | void method(rename) (Shape self, str name); |
| 13 | void method(reset) (Shape self, int x1, int y1, int x2, int y2, int x3, int y3); |
| 14 | float method(area) (Shape self); |
| 15 | int count; |
| 16 | }; |
| 17 | |
| 18 | /* We intentionaly define heterogenous objects, which share only the interface |
| 19 | binding. Not only we can use different order of variables, and different |
| 20 | names - but we can even store these data on remote systems, etc. */ |
| 21 | |
| 22 | def_mem(Tri) |
| 23 | { |
| 24 | interface(Interface); |
| 25 | int x1, y1, x2, y2, x3, y3; |
| 26 | str name; |
| 27 | }; |
| 28 | |
| 29 | def_mem(Rect) |
| 30 | { |
| 31 | interface(Interface); |
| 32 | str desc; |
| 33 | int x1, y1, x2, y2; |
| 34 | }; |
| 35 | |
| 36 | def_mem(Circ) |
| 37 | { |
| 38 | interface(Interface); |
| 39 | int x1, y1; |
| 40 | str comment; |
| 41 | int r; |
| 42 | }; |
| 43 | |
| 44 | def_community(Shape, Interface); |
| 45 | |
| 46 | /* Note: interface(Interface); has to be at first position in all objects asociated in community */ |
| 47 | |
| 48 | def_mem(Object_list) |
| 49 | { |
| 50 | Shape object; |
| 51 | list(Object_list); |
| 52 | }; |
| 53 | |
| 54 | |
| 55 | /* implementation of methods */ |
| 56 | |
| 57 | void drawTri(Shape community) |
| 58 | { |
| 59 | I_am(Tri); |
| 60 | |
| 61 | printf("Drawing %s: %d,%d - %d,%d - %d,%d .\n", |
| 62 | self->name, self->x1, self->y1, self->x2, self->y2, self->x3, self->y3); |
| 63 | }; |
| 64 | |
| 65 | void drawRect(Shape community) |
| 66 | { |
| 67 | I_am(Rect); |
| 68 | |
| 69 | printf("Drawing %s: %d,%d - %d,%d .\n", |
| 70 | self->desc, self->x1, self->y1, self->x2, self->y2); |
| 71 | }; |
| 72 | |
| 73 | void drawCirc(Shape community) |
| 74 | { |
| 75 | I_am(Circ); |
| 76 | |
| 77 | printf("Drawing %s: %d,%d - r=%d .\n", |
| 78 | self->comment, self->x1, self->y1, self->r); |
| 79 | }; |
| 80 | |
| 81 | void moveTri(Shape community, int x, int y) |
| 82 | { |
| 83 | I_am(Tri); |
| 84 | |
| 85 | self->x1 += x; |
| 86 | self->y1 += y; |
| 87 | self->x2 += x; |
| 88 | self->y2 += y; |
| 89 | self->x3 += x; |
| 90 | self->y3 += y; |
| 91 | }; |
| 92 | |
| 93 | void moveRect(Shape community, int x, int y) |
| 94 | { |
| 95 | I_am(Rect); |
| 96 | |
| 97 | self->x1 += x; |
| 98 | self->y1 += y; |
| 99 | self->x2 += x; |
| 100 | self->y2 += y; |
| 101 | }; |
| 102 | |
| 103 | void moveCirc(Shape community, int x, int y) |
| 104 | { |
| 105 | I_am(Circ); |
| 106 | |
| 107 | self->x1 += x; |
| 108 | self->y1 += y; |
| 109 | }; |
| 110 | |
| 111 | str descTri(Shape community) |
| 112 | { |
| 113 | I_am(Tri); |
| 114 | |
| 115 | return self->name; |
| 116 | } |
| 117 | |
| 118 | str descRect(Shape community) |
| 119 | { |
| 120 | I_am(Rect); |
| 121 | |
| 122 | return self->desc; |
| 123 | } |
| 124 | |
| 125 | str descCirc(Shape community) |
| 126 | { |
| 127 | I_am(Circ); |
| 128 | |
| 129 | return self->comment; |
| 130 | } |
| 131 | |
| 132 | float calcAreaTri(Shape community) |
| 133 | { |
| 134 | I_am(Tri); |
| 135 | |
| 136 | return 0; |
| 137 | } |
| 138 | |
| 139 | float calcAreaRect(Shape community) |
| 140 | { |
| 141 | I_am(Rect); |
| 142 | |
| 143 | return (self->x2-self->x1)*(self->y2-self->y1); |
| 144 | } |
| 145 | |
| 146 | float calcAreaCirc(Shape community) |
| 147 | { |
| 148 | I_am(Circ); |
| 149 | |
| 150 | return 3.14159*self->r*self->r; |
| 151 | } |
| 152 | |
| 153 | void setTri(Shape community, int x1, int y1, int x2, int y2, int x3, int y3) |
| 154 | { |
| 155 | I_am(Tri); |
| 156 | |
| 157 | self->x1 = x1; |
| 158 | self->y1 = y1; |
| 159 | self->x2 = x2; |
| 160 | self->y2 = y2; |
| 161 | self->x3 = x3; |
| 162 | self->y3 = y3; |
| 163 | } |
| 164 | |
| 165 | void setRect(Shape community, int x1, int y1, int x2, int y2, int dummy1, int dummy2) |
| 166 | { |
| 167 | I_am(Rect); |
| 168 | |
| 169 | self->x1 = x1; |
| 170 | self->y1 = y1; |
| 171 | self->x2 = x2; |
| 172 | self->y2 = y2; |
| 173 | } |
| 174 | |
| 175 | void setCirc(Shape community, int x1, int y1, int r, int dummy1, int dummy2, int dummy3) |
| 176 | { |
| 177 | I_am(Circ); |
| 178 | |
| 179 | self->x1 = x1; |
| 180 | self->y1 = y1; |
| 181 | self->r = r; |
| 182 | } |
| 183 | |
| 184 | void nameRect(Shape community, str name) |
| 185 | { |
| 186 | I_am(Rect); |
| 187 | |
| 188 | self->desc = name; |
| 189 | } |
| 190 | |
| 191 | /* Example of using object interface methods from inside constructor methods */ |
| 192 | |
| 193 | construct(Tri) (Tri self, int x1, int y1, int x2, int y2, int x3, int y3) |
| 194 | { |
| 195 | self->name = "TRIANGLE"; |
| 196 | interface_of(self)->count++; |
| 197 | _(reset, self, x1, y1, x2, y2, x3, y3); |
| 198 | |
| 199 | return self; |
| 200 | } |
| 201 | |
| 202 | construct(Rect) (Rect self, int x1, int y1, int x2, int y2) |
| 203 | { |
| 204 | self->desc = "rectangle"; |
| 205 | interface_of(self)->count++; |
| 206 | _(reset, self, x1, y1, x2, y2, 0, 0); |
| 207 | |
| 208 | return self; |
| 209 | } |
| 210 | |
| 211 | construct(Circ) (Circ self, int x1, int y1, int r) |
| 212 | { |
| 213 | self->comment = "Circle"; |
| 214 | interface_of(self)->count++; |
| 215 | _(reset, self, x1, y1, r, 0, 0, 0); |
| 216 | |
| 217 | return self; |
| 218 | } |
| 219 | |
| 220 | /* registration of implemented methods to three interfaces of the same type */ |
| 221 | |
| 222 | Interface triInterface(void) |
| 223 | { |
| 224 | Get_mem(this, Interface); |
| 225 | |
| 226 | this->draw = drawTri; |
| 227 | this->move = moveTri; |
| 228 | this->desc = descTri; |
| 229 | this->rename = NULL; |
| 230 | this->reset = setTri; |
| 231 | this->area = calcAreaTri; |
| 232 | this->count = 0; |
| 233 | |
| 234 | return this; |
| 235 | } |
| 236 | |
| 237 | Interface rectInterface(void) |
| 238 | { |
| 239 | Get_mem(this, Interface); |
| 240 | |
| 241 | this->draw = drawRect; |
| 242 | this->move = moveRect; |
| 243 | this->desc = descRect; |
| 244 | this->rename = nameRect; |
| 245 | this->reset = setRect; |
| 246 | this->area = calcAreaRect; |
| 247 | this->count = 0; |
| 248 | |
| 249 | return this; |
| 250 | } |
| 251 | |
| 252 | Interface circInterface(void) |
| 253 | { |
| 254 | Get_mem(this, Interface); |
| 255 | |
| 256 | this->draw = drawCirc; |
| 257 | this->move = moveCirc; |
| 258 | this->desc = descCirc; |
| 259 | this->rename = NULL; |
| 260 | this->reset = setCirc; |
| 261 | this->area = calcAreaCirc; |
| 262 | this->count = 0; |
| 263 | |
| 264 | return this; |
| 265 | } |
| 266 | |
| 267 | /* usage of objects inside C<<1 program */ |
| 268 | |
| 269 | program |
| 270 | { |
| 271 | Interface triangles = triInterface(); |
| 272 | Interface rectangles = rectInterface(); |
| 273 | Interface circles = circInterface(); |
| 274 | Object_list all = NULL, one; |
| 275 | |
| 276 | one = get_mem(Object_list); |
| 277 | one->object = get_obj_as(Shape, Rect, rectangles, 0, 10, 1, 11); |
| 278 | append(one, all); |
| 279 | |
| 280 | one = get_mem(Object_list); |
| 281 | one->object = get_obj_as(Shape, Tri, triangles, 0, 0, 0, 4, 3, 0); |
| 282 | append(one, all); |
| 283 | |
| 284 | one = get_mem(Object_list); |
| 285 | one->object = get_obj_as(Shape, Rect, rectangles, 10, 0, 11, 1); |
| 286 | append(one, all); |
| 287 | |
| 288 | one = get_mem(Object_list); |
| 289 | one->object = get_obj_as(Shape, Circ, circles, 0, 10, 1); |
| 290 | append(one, all); |
| 291 | |
| 292 | printf("We have created %d triangles, %d rectangles and %d circles:\n", |
| 293 | triangles->count, rectangles->count, circles->count); |
| 294 | |
| 295 | for_each(one, all) |
| 296 | { |
| 297 | _(draw, one->object); |
| 298 | printf("Area of this %s is %f (square pixels).\n", _(desc, one->object), _(area, one->object)); |
| 299 | printf("We have created %d instances of this type of object.\n", interface_of(one->object)->count); |
| 300 | |
| 301 | if(interface_of(one->object) == rectangles) |
| 302 | { |
| 303 | _(reset, one->object, 0, 0, 1, 1, 0, 0); |
| 304 | _(rename, one->object, "Renamed rectangle"); |
| 305 | } |
| 306 | else |
| 307 | { |
| 308 | _(move, one->object, 10, 10); |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | print("Rectangles were reset to new size and renamed, other objects were moved:"); |
| 313 | for_each(one, all) |
| 314 | { |
| 315 | _(draw, one->object); |
| 316 | } |
| 317 | } |