stickynotememo
26 lines
722 B
Plaintext
26 lines
722 B
Plaintext
use std::ffi::CStr;
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use std::ffi::c_char;
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#[cfg(target_family = "unix")]
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extern "C" {
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fn _2_c_func() -> *const c_char;
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}
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fn main() -> Result<(), String> {
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let raw_string_pointer: *const c_char = unsafe { _2_c_func() };
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if raw_string_pointer.is_null() {
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return Err(String::from("pointer is null"));
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};
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let c_string = unsafe { CStr::from_ptr(raw_string_pointer) }; // SAFETY: we are assuming the
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// string is null terminated since we created it ourselves in a previous program. However, if
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// it is not, it is UB.
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let Some(string) = c_string.to_str() else {
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return Err(String::from("string should be null terminated"))
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};
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println!("{}", string);
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Ok(())
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}
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