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Private external symbols experiment #248

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Private external symbols experiment #248

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20 changes: 20 additions & 0 deletions sxbp/sxbp_internal.h
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,26 @@
extern "C" {
#endif

// these concatenation macros are needed to properly concatenate other macros
#define CAT(prefix, major, minor, patch, symbol) CAT_(prefix, major, minor, patch, symbol)
#define CAT_(prefix, major, minor, patch, symbol) prefix ## _ ## major ## minor ## patch ## _ ## symbol
// a cheap "private" symbol generator, which uses version number as a prefix
#define SXBP_PRIVATE(symbol) CAT(SXBP_PRIVATE, SXBP_VERSION_MAJOR, SXBP_VERSION_MINOR, SXBP_VERSION_PATCH, symbol)

// the following symbols need to be external, but "private"
#define SXBP_VECTOR_DIRECTIONS SXBP_PRIVATE(VECTOR_DIRECTIONS)
#define sxbp_update_bounds SXBP_PRIVATE(update_bounds)
#define sxbp_move_location SXBP_PRIVATE(move_location)
#define sxbp_move_location_along_line SXBP_PRIVATE(move_location_along_line)
#define sxbp_get_bounds SXBP_PRIVATE(get_bounds)
#define sxbp_get_origin_from_bounds SXBP_PRIVATE(get_origin_from_bounds)
#define sxbp_walk_figure SXBP_PRIVATE(walk_figure)
#define sxbp_get_size_from_bounds SXBP_PRIVATE(get_size_from_bounds)
#define sxbp_dimension_to_string SXBP_PRIVATE(dimension_to_string)
#define sxbp_make_bitmap_for_bounds SXBP_PRIVATE(make_bitmap_for_bounds)
#define sxbp_print_bitmap SXBP_PRIVATE(print_bitmap)
#define sxbp_refine_figure_shrink_from_end SXBP_PRIVATE(refine_figure_shrink_from_end)

// private type for storing one of the items of a tuple
typedef int32_t sxbp_tuple_item_t;

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