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/* uppercase.c */
#include <stdio.h>
#include <stdlib.h>
#include "duktape.h"
static int dummy_upper_case(duk_context *ctx) {
size_t sz;
const char *val = duk_require_lstring(ctx, 0, &sz);
size_t i;
/* We're going to need 'sz' additional entries on the stack. */
duk_require_stack(ctx, sz);
for (i = 0; i < sz; i++) {
char ch = val[i];
if (ch >= 'a' && ch <= 'z') {
ch = ch - 'a' + 'A';
}
duk_push_lstring(ctx, (const char *) &ch, 1);
}
duk_concat(ctx, sz);
return 1;
}
int main(int argc, char *argv[]) {
duk_context *ctx;
if (argc < 2) { exit(1); }
ctx = duk_create_heap_default();
if (!ctx) { exit(1); }
duk_push_c_function(ctx, dummy_upper_case, 1);
duk_push_string(ctx, argv[1]);
duk_call(ctx, 1);
printf("%s -> %s\n", argv[1], duk_to_string(ctx, -1));
duk_pop(ctx);
duk_destroy_heap(ctx);
return 0;
}
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