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#include <assert.h>
#include <stdio.h>
#include <emscripten.h>
int main() {
FILE *file;
int res;
char buffer[512];
// write something locally with node
EM_ASM(
var fs = require('fs');
fs.writeFileSync('foobar.txt', 'yeehaw');
);
// mount the current folder as a NODEFS instance
// inside of emscripten
EM_ASM(
FS.mkdir('/working');
FS.mount(NODEFS, { root: '.' }, '/working');
);
// read and validate the contents of the file
file = fopen("/working/foobar.txt", "r");
assert(file);
res = fread(buffer, sizeof(char), 6, file);
assert(res == 6);
fclose(file);
assert(!strcmp(buffer, "yeehaw"));
// write out something new
file = fopen("/working/foobar.txt", "w");
assert(file);
res = fwrite("cheez", sizeof(char), 5, file);
assert(res == 5);
fclose(file);
// validate the changes were persisted to the underlying fs
EM_ASM(
var fs = require('fs');
var contents = fs.readFileSync('foobar.txt', { encoding: 'utf8' });
assert(contents === 'cheez');
);
puts("success");
return 0;
}
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