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8d83727429
* split sys_math, sys_math3d, z_lib from global.h * suggestions * forgot this * more math stuff * nit fix * re-add ichain.h * resolve tharo's comments
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
#include "ultra64.h"
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/**
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* memcpy: copies `len` bytes from memory starting at `src` to memory starting at `dest`. Expects the memory
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* specified by `src` and `dest` to not overlap.
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*
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* @see libultra also has a memcpy().
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*
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* @param dest address of start of buffer writing to
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* @param src address of start of buffer to read from
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* @param len number of bytes to copy. (`s32` rather than the standard `size_t`)
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*
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* @return dest
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*/
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void* MemCpy(void* dest, const void* src, s32 len) {
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u8* d = dest;
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const u8* s = src;
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while (len > 0) {
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*d++ = *s++;
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len--;
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}
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return dest;
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}
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/**
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* memset: sets `len` bytes to `val` starting at address `dest`.
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*
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* @see There are two other memsets in this codebase, Lib_MemSet(), __osMemset().
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* This one is unused.
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*
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* @param dest address to start at
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* @param val value to write (`s32`, but interpreted as `u8`)
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* @param len number of bytes to write. (`s32` rather than the standard `size_t`)
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*
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* @return dest
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*/
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void* MemSet(void* dest, s32 val, s32 len) {
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u8* d = dest;
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s32 s = len;
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while (s > 0) {
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*d++ = val;
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s--;
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}
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return dest;
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}
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