include/cvw/algorithms/detail.hpp

Shared algorithm error codes and input validation helpers. More...

Namespaces

Name
cvw
cvw::detail Internal validation helpers used by algorithm implementations.

Detailed Description

Shared algorithm error codes and input validation helpers.

Author: Charliechen114514

Version: 1.0.0

Since: 1.0.0

Date: 2026-05-15

Defines the AlgorithmError enum used across all algorithm functions and a set of lightweight validators that return expected<void> for composable error reporting.

Source code

#pragma once
#include "../base/expected.hpp"
#include "../image.hpp"
#include "../image_view.hpp"
#include <cstdint>

namespace cvw {

enum class AlgorithmError : uint8_t {
    EmptyInput,        
    InvalidParameter,  
    InternalError,     
    SaveFailed,        
    LoadFailed,        
};

namespace detail {

template <is_pixel_format F> inline auto check_non_empty(const Image<F>& img)
    -> expected<void, AlgorithmError> {
    if (img.empty()) {
        return unexpected(AlgorithmError::EmptyInput);
    }
    return {};
}

template <is_pixel_format F>
inline auto check_non_empty(const ImageView<F>& view)
    -> expected<void, AlgorithmError> {
    if (view.empty()) {
        return unexpected(AlgorithmError::EmptyInput);
    }
    return {};
}

inline auto require_odd(int k) -> expected<void, AlgorithmError> {
    if (k <= 0 || k % 2 == 0) {
        return unexpected(AlgorithmError::InvalidParameter);
    }
    return {};
}

inline auto require_positive_dim(int w, int h)
    -> expected<void, AlgorithmError> {
    if (w <= 0 || h <= 0) {
        return unexpected(AlgorithmError::InvalidParameter);
    }
    return {};
}

} // namespace detail
} // namespace cvw

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Updated on 2026-05-17 at 13:22:38 +0000