Function proc_argv_len

host/sysenv/sys_proc.cpp:37–44

argv_len(idx:i32) -> i32 Returns the byte length of argument[idx] (not including null terminator), or -EINVAL if idx is out of range.

// Returns the byte length of argument[idx] (not including null terminator),
// or -EINVAL if idx is out of range.
static std::vector<Value> proc_argv_len(Stack& stack) {
    Frame& frame = stack.frames.top();
    i32_t idx = std::get<i32_t>(frame.locals[0]);
    if(idx < 0 || (size_t)idx >= wasmvm_args.size()) {
        return {Value(i32_t(-EINVAL))};
    }
    return {Value(i32_t(wasmvm_args[(size_t)idx].size()))};
}

// argv(idx:i32, buf_ptr, buf_len) -> i32
static std::vector<Value> proc_argv(Stack& stack) {