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Memstuff (#1164)

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* Un-fake a couple of matches in memory manip functions

* Document fmodf

* Un-fake a couple of matches in memory manip functions

* Document fmodf

* Rename functions and files

* Document memmove, memsets, memcpys

* Format

* Sort out some missing sizeofs

* Name fmodf

* Rename local variables

* size_t

* Use COBRA_SHADOW_TEX_SIZE

* Review

* Tweak the Doxyfile to remove @brief requirement

* Roman's review

* Fix a bug comment

* Change fmodf
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EllipticEllipsis 2022-05-01 23:06:35 +01:00 • committed by GitHub
parent 7334ffa373
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src/code/fmodf.c
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@ -1,12 +1,27 @@
#include "global.h"
/**
* Computes one `x` modulo `y` for floats.
*
* Acts like the standard C fmodf except does not handle Infinity. See https://en.cppreference.com/w/c/numeric/math/fmod
* for the details. It summarizes this function as follows:
* "The floating-point remainder of the division operation x/y calculated by this function is exactly the value x - n*y,
* where n is x/y with its fractional part truncated.
*
* The returned value has the same sign as x and is less or equal to y in magnitude."
*
* @param x dividend
* @param y modulus
*
* @return f32 0.0f if y is 0.0f, or x modulo y otherwise
*/
f32 fmodf(f32 x, f32 y) {
s32 quot;
s32 n;
if (y == 0.0f) {
return 0.0f;
}
quot = x / y;
n = x / y;
return x - (quot * y);
return x - (n * y);
}