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/**
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/**
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 * @file
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 * @file
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 * @brief   Memory string operations.
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 * @brief   Memory string operations.
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 *
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 *
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 * This file provides architecture independent functions
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 * This file provides architecture independent functions to manipulate blocks of
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 * to manipulate blocks of memory. These functions
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 * are optimized as much as generic functions of
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 * memory. These functions are optimized as much as generic functions of this
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 * this type can be. However, architectures are
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 * type can be. However, architectures are free to provide even more optimized
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 * free to provide even more optimized versions of these
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 * functions.
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 * versions of these functions.
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 */
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 */
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#include <memstr.h>
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#include <memstr.h>
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#include <arch/types.h>
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#include <arch/types.h>
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#include <align.h>
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#include <align.h>
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/** Copy block of memory
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/** Copy block of memory.
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 *
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 *
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 * Copy cnt bytes from src address to dst address.
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 * Copy cnt bytes from src address to dst address.  The copying is done
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 * The copying is done word-by-word and then byte-by-byte.
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 * word-by-word and then byte-by-byte.  The source and destination memory areas
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 * The source and destination memory areas cannot overlap.
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 * cannot overlap.
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 *
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 *
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 * @param src Origin address to copy from.
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 * @param src       Source address to copy from.
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 * @param dst Origin address to copy to.
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 * @param dst       Destination address to copy to.
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 * @param cnt Number of bytes to copy.
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 * @param cnt       Number of bytes to copy.
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 *
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 *
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 * @return      Destination address.
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 */
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 */
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void *_memcpy(void * dst, const void *src, size_t cnt)
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void *_memcpy(void *dst, const void *src, size_t cnt)
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{
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{
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    unsigned int i, j;
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    unsigned int i, j;
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    if (ALIGN_UP((uintptr_t) src, sizeof(unative_t)) != (uintptr_t) src ||
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    if (ALIGN_UP((uintptr_t) src, sizeof(unative_t)) != (uintptr_t) src ||
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        ALIGN_UP((uintptr_t) dst, sizeof(unative_t)) != (uintptr_t) dst) {
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        ALIGN_UP((uintptr_t) dst, sizeof(unative_t)) != (uintptr_t) dst) {
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        for (i = 0; i < cnt; i++)
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        for (i = 0; i < cnt; i++)
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            ((uint8_t *) dst)[i] = ((uint8_t *) src)[i];
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            ((uint8_t *) dst)[i] = ((uint8_t *) src)[i];
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    } else {
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    } else {
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        for (i = 0; i < cnt / sizeof(unative_t); i++)
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        for (i = 0; i < cnt / sizeof(unative_t); i++)
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            ((unative_t *) dst)[i] = ((unative_t *) src)[i];
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            ((unative_t *) dst)[i] = ((unative_t *) src)[i];
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        for (j = 0; j < cnt % sizeof(unative_t); j++)
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        for (j = 0; j < cnt % sizeof(unative_t); j++)
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            ((uint8_t *)(((unative_t *) dst) + i))[j] =
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            ((uint8_t *)(((unative_t *) dst) + i))[j] = ((uint8_t *)(((unative_t *) src) + i))[j];
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                ((uint8_t *)(((unative_t *) src) + i))[j];
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    }
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    }
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    return (char *) dst;
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    return (char *) dst;
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}
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}
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/** Fill block of memory
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/** Fill block of memory
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 *
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 *
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 * Fill cnt bytes at dst address with the value x.
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 * Fill cnt bytes at dst address with the value x.  The filling is done
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 * The filling is done byte-by-byte.
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 * byte-by-byte.
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 *
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 *
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 * @param dst Origin address to fill.
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 * @param dst       Destination address to fill.
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 * @param cnt Number of bytes to fill.
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 * @param cnt       Number of bytes to fill.
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 * @param x   Value to fill.
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 * @param x     Value to fill.
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 *
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 *
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 */
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 */
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void _memsetb(void *dst, size_t cnt, uint8_t x)
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void _memsetb(void *dst, size_t cnt, uint8_t x)
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{
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{
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    unsigned int i;
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    unsigned int i;
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    for (i = 0; i < cnt; i++)
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    for (i = 0; i < cnt; i++)
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        p[i] = x;
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        p[i] = x;
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}
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}
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/** Fill block of memory
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/** Fill block of memory.
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 *
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 *
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 * Fill cnt words at dst address with the value x.
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 * Fill cnt words at dst address with the value x.  The filling is done
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 * The filling is done word-by-word.
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 * word-by-word.
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 *
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 *
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 * @param dst Origin address to fill.
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 * @param dst       Destination address to fill.
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 * @param cnt Number of words to fill.
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 * @param cnt       Number of words to fill.
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 * @param x   Value to fill.
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 * @param x     Value to fill.
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 *
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 *
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 */
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 */
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void _memsetw(void *dst, size_t cnt, uint16_t x)
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void _memsetw(void *dst, size_t cnt, uint16_t x)
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{
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{
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    unsigned int i;
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    unsigned int i;
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    for (i = 0; i < cnt; i++)
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    for (i = 0; i < cnt; i++)
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        p[i] = x;  
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        p[i] = x;  
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}
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}
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/** Copy string
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/** Copy string.
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 *
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 *
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 * Copy string from src address to dst address.
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 * Copy string from src address to dst address.  The copying is done
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 * The copying is done char-by-char until the null
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 * character. The source and destination memory areas
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 * char-by-char until the null character. The source and destination memory
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 * cannot overlap.
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 * areas cannot overlap.
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 *
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 *
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 * @param src Origin string to copy from.
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 * @param src       Source string to copy from.
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 * @param dst Origin string to copy to.
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 * @param dst       Destination string to copy to.
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 *
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 *
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 * @return      Address of the destination string.
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 */
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 */
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char *strcpy(char *dest, const char *src)
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char *strcpy(char *dest, const char *src)
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{
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{
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    char *orig = dest;
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    char *orig = dest;
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