Jeremy Baxter
669eb3fd28
When I figure out how to make clang-format ignore struct array initialisers, I'll get rid of this.
69 lines
1.1 KiB
C
69 lines
1.1 KiB
C
/*
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* Callisto - standalone scripting platform for Lua 5.4
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* Copyright (c) 2023-2024 Jeremy Baxter.
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*/
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/***
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* Extra functions that don't fit into any other category.
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*
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* This module does not provide its own table;
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* all functions here are found in the global table.
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*
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* @module extra
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*/
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#include <time.h>
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#include <lua/lauxlib.h>
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#include <lua/lua.h>
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/***
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* Waits the specified amount of seconds.
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*
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* @function sleep
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* @usage
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local minutes = 5
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sleep(minutes * 60) -- 5 minutes
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* @tparam number seconds The amount of seconds to wait.
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*/
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static int
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extra_sleep(lua_State *L)
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{
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/* Implementation from luasocket */
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double n;
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struct timespec t, r;
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n = luaL_checknumber(L, 1);
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if (n < 0.0)
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n = 0.0;
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if (n > INT_MAX)
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n = INT_MAX;
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t.tv_sec = (int)n;
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n -= t.tv_sec;
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t.tv_nsec = (int)(n * 1000000000);
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if (t.tv_nsec >= 1000000000)
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t.tv_nsec = 999999999;
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while (nanosleep(&t, &r) != 0) {
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t.tv_sec = r.tv_sec;
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t.tv_nsec = r.tv_nsec;
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}
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return 0;
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}
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/* clang-format off */
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static const luaL_Reg extlib[] = {
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{"sleep", extra_sleep},
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{NULL, NULL}
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};
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int
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luaopen_extra(lua_State *L)
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{
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luaL_newlib(L, extlib);
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return 1;
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}
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