Macro yaml_strdup

macro_rules! yaml_strdup {
    ($str:expr) => { ... };
}

Duplicates a string using the system’s malloc function and manual copy.

This macro wraps the yaml_strdup function, providing a more Rust-like interface.

Arguments

• str - A pointer to the null-terminated string to duplicate.

Returns

Returns a *mut yaml_char_t pointer to the newly allocated string, or None if the allocation failed or the input was null.

Safety

While this macro provides a safer interface than direct use of yaml_strdup, it is still unsafe because:

• It involves memory allocation and raw pointer manipulation.
• The caller must ensure that str is a valid, null-terminated string.
• The caller is responsible for freeing the returned pointer using yaml_free!.

Examples

use libyml::yaml::yaml_char_t;
use libyml::{yaml_strdup, yaml_free};

unsafe {
    let original = b"Hello, world!\0".as_ptr() as *const yaml_char_t;
    if let Some(copy) = yaml_strdup!(original) {
        // Use the duplicated string
        // ...
        yaml_free!(copy);
    }
}