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SDL_stdinc.h: Add an SDL_clamp() function
Add a function to clamp a value to a range. SDL_clamp(x, a, b) is equivalent to SDL_min(a, SDL_max(x, b)): it ensures that x is not smaller than a, nor larger than b. While, as best I can tell, this isn't actually standardised anywhere, it's a very useful function/macro to have.
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@ -444,6 +444,7 @@ extern DECLSPEC int SDLCALL SDL_abs(int x);
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/* NOTE: these double-evaluate their arguments, so you should never have side effects in the parameters */
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#define SDL_min(x, y) (((x) < (y)) ? (x) : (y))
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#define SDL_max(x, y) (((x) > (y)) ? (x) : (y))
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#define SDL_clamp(x, a, b) ((x) < (a)) ? (a) : (((x) > (b)) ? (b) : (x))
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extern DECLSPEC int SDLCALL SDL_isalpha(int x);
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extern DECLSPEC int SDLCALL SDL_isalnum(int x);
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