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annotate runtime/object.c @ 318:4c669942c30d

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Add bindings for SDL_CreateTexture, SDL_LockTexture, SDL_SetBlendMode and SDL_GetBlendMode in SDL module
author Michael Pavone <pavone@retrodev.com>
date Thu, 19 Mar 2015 22:40:43 -0700
parents d2b70cba661e
children
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1 #include "object.h"
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2 #include <stdarg.h>
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3 #include <stdlib.h>
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4 #include <stddef.h>
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5 #include <gc/gc.h>
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7 void * make_object(obj_meta * meta, void * parent, int num_props, ...)
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8 {
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9 va_list args;
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10 object * newobj = GC_MALLOC(meta->size);
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11 newobj->meta = meta;
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12 newobj->parent = parent;
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14 va_start(args, num_props);
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15 object ** curprop = ((object **)(newobj + 1));
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16 for (; num_props > 0; num_props--)
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17 {
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18 *curprop = va_arg(args, object *);
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19 curprop++;
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20 }
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21 va_end(args);
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22 return newobj;
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23 }
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25 object * mcall(uint32_t method_id, uint32_t num_args, object * self, ...)
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26 {
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27 va_list args;
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28 va_start(args, self);
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29 object * ret = self->meta->meth_lookup[method_id & 0xF](method_id, num_args, self, args);
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30 va_end(args);
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31 return ret;
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32 }
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34 int object_understands(object * obj, uint32_t method_id)
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35 {
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36 uint32_t slot = method_id & 0xF;
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37 uint32_t *cur;
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38 if (!obj->meta->methods[slot]) {
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39 return 0;
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40 }
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41 for (cur = obj->meta->methods[slot]; *cur != LAST_METHOD; cur++) {
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42 if (*cur == method_id) {
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43 return 1;
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44 }
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45 }
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46 return 0;
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47 }