cosmopolitan/examples/hellojs.c

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2020-06-15 14:18:57 +00:00
#if 0
/*─────────────────────────────────────────────────────────────────╗
To the extent possible under law, Justine Tunney has waived
all copyright and related or neighboring rights to this file,
as it is written in the following disclaimers:
http://unlicense.org/ │
http://creativecommons.org/publicdomain/zero/1.0/ │
*/
#endif
#include "libc/calls/calls.h"
#include "libc/calls/struct/stat.h"
#include "libc/log/check.h"
#include "libc/mem/mem.h"
#include "libc/runtime/gc.h"
#include "libc/sysv/consts/o.h"
#include "third_party/duktape/duktape.h"
STATIC_YOINK("zip_uri_support");
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static duk_ret_t NativePrint(duk_context *ctx) {
duk_push_string(ctx, " ");
duk_insert(ctx, 0);
duk_join(ctx, duk_get_top(ctx) - 1);
fputs(duk_safe_to_string(ctx, -1), stdout);
return 0;
}
static duk_ret_t NativeAdd(duk_context *ctx) {
int i, n;
double r;
n = duk_get_top(ctx);
for (r = i = 0; i < n; i++) r += duk_to_number(ctx, i);
duk_push_number(ctx, r);
return 1;
}
int main(int argc, char *argv[]) {
int fd;
struct stat st;
const char *code;
duk_context *ctx;
ctx = duk_create_heap_default();
duk_push_c_function(ctx, NativePrint, DUK_VARARGS);
duk_put_global_string(ctx, "NativePrint");
duk_push_c_function(ctx, NativeAdd, DUK_VARARGS);
duk_put_global_string(ctx, "NativeAdd");
CHECK_NE(-1, (fd = open("zip:examples/hello.js", O_RDONLY)));
CHECK_NE(-1, fstat(fd, &st));
CHECK_NOTNULL((code = gc(malloc(st.st_size))));
CHECK_EQ(st.st_size, read(fd, code, st.st_size));
CHECK_NE(-1, close(fd));
duk_eval_string(ctx, code);
duk_pop(ctx);
duk_destroy_heap(ctx);
return 0;
}