34,12 → 34,10 |
* @file |
* @brief Memory string operations. |
* |
* This file provides architecture independent functions |
* to manipulate blocks of memory. These functions |
* are optimized as much as generic functions of |
* this type can be. However, architectures are |
* free to provide even more optimized versions of these |
* functions. |
* This file provides architecture independent functions to manipulate blocks of |
* memory. These functions are optimized as much as generic functions of this |
* type can be. However, architectures are free to provide even more optimized |
* versions of these functions. |
*/ |
|
#include <memstr.h> |
46,16 → 44,17 |
#include <arch/types.h> |
#include <align.h> |
|
/** Copy block of memory |
/** Copy block of memory. |
* |
* Copy cnt bytes from src address to dst address. |
* The copying is done word-by-word and then byte-by-byte. |
* The source and destination memory areas cannot overlap. |
* Copy cnt bytes from src address to dst address. The copying is done |
* word-by-word and then byte-by-byte. The source and destination memory areas |
* cannot overlap. |
* |
* @param src Origin address to copy from. |
* @param dst Origin address to copy to. |
* @param src Source address to copy from. |
* @param dst Destination address to copy to. |
* @param cnt Number of bytes to copy. |
* |
* @return Destination address. |
*/ |
void *_memcpy(void * dst, const void *src, size_t cnt) |
{ |
66,23 → 65,23 |
for (i = 0; i < cnt; i++) |
((uint8_t *) dst)[i] = ((uint8_t *) src)[i]; |
} else { |
|
for (i = 0; i < cnt / sizeof(unative_t); i++) |
((unative_t *) dst)[i] = ((unative_t *) src)[i]; |
|
for (j = 0; j < cnt % sizeof(unative_t); j++) |
((uint8_t *)(((unative_t *) dst) + i))[j] = ((uint8_t *)(((unative_t *) src) + i))[j]; |
((uint8_t *)(((unative_t *) dst) + i))[j] = |
((uint8_t *)(((unative_t *) src) + i))[j]; |
} |
|
return (char *) src; |
return (char *) dst; |
} |
|
/** Fill block of memory |
* |
* Fill cnt bytes at dst address with the value x. |
* The filling is done byte-by-byte. |
* Fill cnt bytes at dst address with the value x. The filling is done |
* byte-by-byte. |
* |
* @param dst Origin address to fill. |
* @param dst Destination address to fill. |
* @param cnt Number of bytes to fill. |
* @param x Value to fill. |
* |
96,12 → 95,12 |
p[i] = x; |
} |
|
/** Fill block of memory |
/** Fill block of memory. |
* |
* Fill cnt words at dst address with the value x. |
* The filling is done word-by-word. |
* Fill cnt words at dst address with the value x. The filling is done |
* word-by-word. |
* |
* @param dst Origin address to fill. |
* @param dst Destination address to fill. |
* @param cnt Number of words to fill. |
* @param x Value to fill. |
* |
115,16 → 114,16 |
p[i] = x; |
} |
|
/** Copy string |
/** Copy string. |
* |
* Copy string from src address to dst address. |
* The copying is done char-by-char until the null |
* character. The source and destination memory areas |
* cannot overlap. |
* Copy string from src address to dst address. The copying is done |
* char-by-char until the null character. The source and destination memory |
* areas cannot overlap. |
* |
* @param src Origin string to copy from. |
* @param dst Origin string to copy to. |
* @param src Source string to copy from. |
* @param dst Destination string to copy to. |
* |
* @return Address of the destination string. |
*/ |
char *strcpy(char *dest, const char *src) |
{ |