prosperon/source/engine/script.c

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#include "script.h"
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#include "log.h"
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#include "stdio.h"
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#include "ffi.h"
#include "font.h"
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#include "ftw.h"
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#include "stb_ds.h"
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#include "sys/stat.h"
#include "sys/types.h"
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#include "time.h"
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JSContext *js = NULL;
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JSRuntime *rt = NULL;
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#ifdef DBG
#define JS_EVAL_FLAGS JS_EVAL_FLAG_STRICT
#else
#define JS_EVAL_FLAGS JS_EVAL_FLAG_STRICT | JS_EVAL_FLAG_STRIP
#endif
static int load_prefab(const char *fpath, const struct stat *sb, int typeflag) {
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if (typeflag != FTW_F)
return 0;
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if (!strcmp(".prefab", strrchr(fpath, '.')))
script_dofile(fpath);
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return 0;
}
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void script_startup() {
rt = JS_NewRuntime();
JS_SetMaxStackSize(rt, 0);
js = JS_NewContext(rt);
ffi_load();
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}
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JSValue num_cache[100] = {0};
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void script_init() {
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/* Load all prefabs into memory */
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// if (DBG)
// script_dofile("scripts/debug.js");
// else
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script_dofile("scripts/engine.js");
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for (int i = 0; i < 100; i++)
num_cache[i] = int2js(i);
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}
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void script_run(const char *script) {
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JS_FreeValue(js, JS_Eval(js, script, strlen(script), "script", JS_EVAL_FLAGS));
}
void compile_script(const char *file) {
const char *script = slurp_text(file);
JSValue obj = JS_Eval(js, script, strlen(script), file, JS_EVAL_FLAG_COMPILE_ONLY | JS_EVAL_TYPE_GLOBAL | JS_EVAL_FLAGS);
size_t out_len;
uint8_t *out;
out = JS_WriteObject(js, &out_len, obj, JS_WRITE_OBJ_BYTECODE);
FILE *f = fopen("out.jsc", "w");
fwrite(out, sizeof out[0], out_len, f);
fclose(f);
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}
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struct callee stacktrace_callee;
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time_t file_mod_secs(const char *file) {
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struct stat attr;
stat(file, &attr);
return attr.st_mtime;
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}
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void js_stacktrace() {
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#ifdef DBG
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call_callee(&stacktrace_callee);
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#endif
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}
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void js_dump_stack() {
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js_stacktrace();
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}
int js_print_exception(JSValue v) {
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#ifdef DBG
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if (JS_IsException(v)) {
JSValue exception = JS_GetException(js);
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/* TODO: Does it need freed if null? */
if (JS_IsNull(exception))
return 0;
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JSValue val = JS_GetPropertyStr(js, exception, "stack");
const char *name = JS_ToCString(js, JS_GetPropertyStr(js, exception, "name"));
const char *msg = JS_ToCString(js, JS_GetPropertyStr(js, exception, "message"));
const char *stack = JS_ToCString(js, val);
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YughLog(LOG_SCRIPT, LOG_ERROR, "%s :: %s\n%s", name, msg,stack);
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JS_FreeCString(js, name);
JS_FreeCString(js, msg);
JS_FreeCString(js, stack);
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JS_FreeValue(js,val);
JS_FreeValue(js,exception);
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return 1;
}
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#endif
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return 0;
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}
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int script_dofile(const char *file) {
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YughInfo("Doing script %s", file);
const char *script = slurp_text(file);
if (!script) {
YughError("Can't find file %s.", file);
return 0;
}
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JSValue obj = JS_Eval(js, script, strlen(script), file, JS_EVAL_FLAGS);
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js_print_exception(obj);
JS_FreeValue(js, obj);
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return file_mod_secs(file);
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}
/* env is an object in the scripting environment;
s is the function to call on that object
*/
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void script_eval_w_env(const char *s, JSValue env) {
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JSValue v = JS_EvalThis(js, env, s, strlen(s), "internal", JS_EVAL_FLAGS);
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js_print_exception(v);
JS_FreeValue(js, v);
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}
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void script_call_sym(JSValue sym) {
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struct callee c;
c.fn = sym;
c.obj = JS_GetGlobalObject(js);
call_callee(&c);
}
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JSValue js_callee_exec(struct callee *c, int argc, JSValue *argv) {
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JSValue ret = JS_Call(js, c->fn, c->obj, argc, argv);
js_print_exception(ret);
JS_FreeValue(js, ret);
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return JS_NULL;
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}
void call_callee(struct callee *c) {
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js_callee_exec(c, 0, NULL);
}
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void callee_dbl(struct callee c, double d) {
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JSValue v = num2js(d);
js_callee_exec(&c, 1, &v);
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JS_FreeValue(js, v);
}
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void callee_int(struct callee c, int i) {
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JSValue v = int2js(i);
js_callee_exec(&c, 1, &v);
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JS_FreeValue(js, v);
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}
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void callee_vec2(struct callee c, cpVect vec) {
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JSValue v = vec2js(vec);
js_callee_exec(&c, 1, &v);
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JS_FreeValue(js, v);
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}
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void script_callee(struct callee c, int argc, JSValue *argv) {
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js_callee_exec(&c, argc, argv);
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}
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static struct callee update_callee;
void register_update(struct callee c) {
update_callee = c;
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}
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void call_updates(double dt) {
callee_dbl(update_callee, dt);
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}
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static struct callee gui_callee;
void register_gui(struct callee c) { gui_callee = c; }
void call_gui() { js_callee_exec(&gui_callee, 0, NULL); }
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static struct callee nk_gui_callee;
void register_nk_gui(struct callee c) { nk_gui_callee = c; }
void call_nk_gui() { js_callee_exec(&nk_gui_callee, 0, NULL); }
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static struct callee physupdate_callee;
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void register_physics(struct callee c) { physupdate_callee = c; }
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void call_physics(double dt) { callee_dbl(physupdate_callee, dt); }
struct callee debug_callee;
void register_debug(struct callee c) { debug_callee = c; }
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void call_debugs() { call_callee(&debug_callee); }
static struct callee draw_callee;
void register_draw(struct callee c) { draw_callee = c; }
void call_draw() { call_callee(&draw_callee); }