Last change
on this file since 865 was
850,
checked in by cfuguet, 10 years ago
|
reconf: introducing a softs directory in the reconfiguration branch
- This softs directory contains a minimalistic (giet-like) library
of drivers and some utility functions.
- Introducing a simple unit test in the vci_cc_vcache_wrapper
component to test the newly introduced watchdog timer mechanism.
This unit test uses the minimalistic library.
|
File size:
1.1 KB
|
Rev | Line | |
---|
[850] | 1 | /** |
---|
| 2 | * \file string.c |
---|
| 3 | * \date July 8, 2014 |
---|
| 4 | * \author Cesar Fuguet |
---|
| 5 | * |
---|
| 6 | * \brief string utility functions |
---|
| 7 | */ |
---|
| 8 | #include <string.h> |
---|
| 9 | |
---|
| 10 | void *memset(void *_dst, int c, size_t len) |
---|
| 11 | { |
---|
| 12 | const char val = (char)c; |
---|
| 13 | |
---|
| 14 | /* |
---|
| 15 | * Write 12 bytes when destination buffer is aligned to 4 bytes and length |
---|
| 16 | * is greater or equal to 12 |
---|
| 17 | */ |
---|
| 18 | int *dst = _dst; |
---|
| 19 | if (!((int)dst & 0x3)) { |
---|
| 20 | const int word = (val << 24) | (val << 16) | (val << 8) | val; |
---|
| 21 | while (len > 11) { |
---|
| 22 | dst[0] = word; |
---|
| 23 | dst[1] = word; |
---|
| 24 | dst[2] = word; |
---|
| 25 | len -= 12; |
---|
| 26 | dst += 3; |
---|
| 27 | } |
---|
| 28 | } |
---|
| 29 | |
---|
| 30 | /* |
---|
| 31 | * Write 1 byte when destination buffer is not aligned to 4 bytes or length |
---|
| 32 | * is smaller than 4 |
---|
| 33 | */ |
---|
| 34 | char *cdst = (char *)dst; |
---|
| 35 | while (len--) { |
---|
| 36 | *cdst++ = val; |
---|
| 37 | } |
---|
| 38 | |
---|
| 39 | return _dst; |
---|
| 40 | } |
---|
| 41 | |
---|
| 42 | void *memcpy(void *_dst, const void *_src, size_t n) |
---|
| 43 | { |
---|
| 44 | uint8_t *cdst = (uint8_t *)_dst; |
---|
| 45 | uint8_t *csrc = (uint8_t *)_src; |
---|
| 46 | while (n--) { |
---|
| 47 | *cdst++ = *csrc++; |
---|
| 48 | } |
---|
| 49 | return _dst; |
---|
| 50 | }; |
---|
| 51 | |
---|
| 52 | /* |
---|
| 53 | * vim: tabstop=4 : softtabstop=4 : shiftwidth=4 : expandtab |
---|
| 54 | */ |
---|
Note: See
TracBrowser
for help on using the repository browser.