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annotate molko-js/src/js-clock.c @ 205:6b29e487da13

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js: enable Molko.Music API
author David Demelier <markand@malikania.fr>
date Tue, 10 Nov 2020 10:10:56 +0100
parents dd77bfb38df2
children
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189
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1 /*
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2 * js-clock.c -- track elapsed time (Javascript bindings)
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3 *
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <assert.h>
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20 #include <stdlib.h>
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21
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22 #include <duktape.h>
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23
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24 #include <core/alloc.h>
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25 #include <core/clock.h>
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26
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27 #include "js.h"
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28 #include "js-window.h"
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29
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30 #define SYMBOL DUK_HIDDEN_SYMBOL("molko::clock")
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31
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32 static struct clock *
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33 js_clock_this(duk_context *ctx)
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34 {
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35 struct clock *clock;
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36
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37 duk_push_this(ctx);
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38 duk_get_prop_string(ctx, -1, SYMBOL);
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39 clock = duk_to_pointer(ctx, -1);
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40 duk_pop_n(ctx, 2);
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41
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42 if (!clock)
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43 duk_error(ctx, DUK_ERR_TYPE_ERROR, "Not a Clock object");
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44
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45 return clock;
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46 }
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47
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48 static duk_ret_t
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49 js_clock_getElapsed(duk_context *ctx)
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50 {
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51 duk_push_uint(ctx, clock_elapsed(js_clock_this(ctx)));
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52
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53 return 1;
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54 }
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55
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56 static duk_ret_t
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57 js_clock_new(duk_context *ctx)
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58 {
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59 if (!duk_is_constructor_call(ctx))
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60 duk_error(ctx, DUK_ERR_TYPE_ERROR, "Clock must be new-constructed");
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61
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62 duk_push_this(ctx);
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63 duk_push_pointer(ctx, alloc_zero(1, sizeof (struct clock)));
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64 duk_put_prop_string(ctx, -2, SYMBOL);
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65 duk_push_string(ctx, "elapsed");
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66 duk_push_c_function(ctx, js_clock_getElapsed, 0);
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67 duk_def_prop(ctx, -3, DUK_DEFPROP_HAVE_GETTER);
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68 duk_pop(ctx);
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69
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70 return 0;
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71 }
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72
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73 static duk_ret_t
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74 js_clock_start(duk_context *ctx)
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75 {
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76 clock_start(js_clock_this(ctx));
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77
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78 return 0;
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79 }
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80
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81 static duk_ret_t
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82 js_clock_finish(duk_context *ctx)
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83 {
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84 duk_get_prop_string(ctx, 0, SYMBOL);
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85 free(duk_to_pointer(ctx, -1));
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86 duk_pop(ctx);
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87 duk_del_prop_string(ctx, 0, SYMBOL);
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88
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89 return 0;
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90 }
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91
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92 static const duk_function_list_entry methods[] = {
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93 { "start", js_clock_start, 0 },
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94 { NULL, NULL, 0 }
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95 };
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96
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97 void
200
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98 js_clock_load(duk_context *ctx)
189
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99 {
200
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100 assert(ctx);
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101
200
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102 duk_push_global_object(ctx);
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103 duk_get_prop_string(ctx, -1, "Molko");
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104 duk_push_c_function(ctx, js_clock_new, 0);
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105 duk_push_object(ctx);
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106 duk_put_function_list(ctx, -1, methods);
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107 duk_push_c_function(ctx, js_clock_finish, 1);
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108 duk_set_finalizer(ctx, -2);
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109 duk_put_prop_string(ctx, -2, "prototype");
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110 duk_put_prop_string(ctx, -2, "Clock");
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111 duk_pop_n(ctx, 2);
189
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112 }