mirror of
https://github.com/ccxvii/mujs.git
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f6c5c56b44
Create script (global/eval code) functions without a scope (they're not closures) and run them with js_eval so they can execute with the current scope chain. Normal functions still have a scope and are run with js_call.
102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
#include "js.h"
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#include "jsobject.h"
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js_Value jsR_toprimitive(js_State *J, const js_Value *v, int preferred)
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{
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js_Object *obj;
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if (v->type != JS_TOBJECT)
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return *v;
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obj = v->u.object;
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if (preferred == JS_HNONE)
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preferred = obj->type == JS_CDATE ? JS_HSTRING : JS_HNUMBER;
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if (preferred == JS_HSTRING) {
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// try "toString"
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// if result is primitive, return result
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// try "valueOf"
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// if result is primitive, return result
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} else {
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// try "toString"
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// if result is primitive, return result
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// try "valueOf"
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// if result is primitive, return result
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}
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jsR_error(J, "TypeError (ToPrimitive)");
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}
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int jsR_toboolean(js_State *J, const js_Value *v)
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{
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switch (v->type) {
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case JS_TUNDEFINED: return 0;
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case JS_TNULL: return 0;
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case JS_TBOOLEAN: return v->u.boolean;
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case JS_TNUMBER: return v->u.number != 0 && !isnan(v->u.number);
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case JS_TSTRING: return v->u.string[0] != 0;
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case JS_TOBJECT: return 0;
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}
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return 0;
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}
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double jsR_tonumber(js_State *J, const js_Value *v)
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{
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switch (v->type) {
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case JS_TUNDEFINED: return NAN;
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case JS_TNULL: return 0;
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case JS_TBOOLEAN: return v->u.boolean;
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case JS_TNUMBER: return v->u.number;
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case JS_TSTRING:
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{
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/* TODO: use lexer to parse string grammar */
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return strtod(v->u.string, NULL);
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}
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case JS_TOBJECT:
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{
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js_Value vv = jsR_toprimitive(J, v, JS_HNUMBER);
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return jsR_tonumber(J, &vv);
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}
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}
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return 0;
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}
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const char *jsR_tostring(js_State *J, const js_Value *v)
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{
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switch (v->type) {
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case JS_TUNDEFINED: return "undefined";
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case JS_TNULL: return "null";
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case JS_TBOOLEAN: return v->u.boolean ? "true" : "false";
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case JS_TNUMBER:
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{
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char buf[32];
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double n = v->u.number;
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if (isnan(n)) return "NaN";
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if (isinf(n)) return n < 0 ? "-Infinity" : "Infinity";
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if (n == 0) return "0";
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sprintf(buf, "%.17g", n); /* DBL_DECIMAL_DIG == 17 */
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return js_intern(J, buf);
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}
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case JS_TSTRING: return v->u.string;
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case JS_TOBJECT:
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{
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js_Value vv = jsR_toprimitive(J, v, JS_HSTRING);
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return jsR_tostring(J, &vv);
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}
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}
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return "undefined";
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}
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js_Object *jsR_toobject(js_State *J, const js_Value *v)
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{
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switch (v->type) {
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case JS_TUNDEFINED: jsR_error(J, "TypeError (ToObject(undefined))");
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case JS_TNULL: jsR_error(J, "TypeError (ToObject(null))");
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case JS_TBOOLEAN: return jsR_newboolean(J, v->u.boolean);
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case JS_TNUMBER: return jsR_newnumber(J, v->u.number);
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case JS_TSTRING: return jsR_newstring(J, v->u.string);
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case JS_TOBJECT: return v->u.object;
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}
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jsR_error(J, "TypeError (ToObject)");
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}
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