const c = @import("c.zig");
const Encoding = @import("types.zig").Encoding;

/// Maximum error message length.
pub const MAX_ERROR_LEN = c.ONIG_MAX_ERROR_MESSAGE_LEN;

/// Convert an Oniguruma error to an error.
pub fn convertError(code: c_int) !c_int {
    if (code >= 0) return code;
    switch (code) {
        else => return error.OnigurumaError,
    }
}

/// Convert an error code to a string. buf must be at least
/// MAX_ERROR_LEN bytes long.
pub fn errorString(buf: []u8, code: c_int) ![]u8 {
    const len = c.onig_error_code_to_str(buf.ptr, code);
    return buf[0..@intCast(len)];
}

/// The Oniguruma error info type, matching the C type exactly.
pub const ErrorInfo = extern struct {
    encoding: *Encoding,
    par: [*]u8,
    par_end: [*]u8,
};