Last change
on this file since 972 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 | |
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[850] | 1 | /** |
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| 2 | * \file string.c |
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| 3 | * \date July 8, 2014 |
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| 4 | * \author Cesar Fuguet |
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| 5 | * |
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| 6 | * \brief string utility functions |
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| 7 | */ |
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| 8 | #include <string.h> |
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| 9 | |
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| 10 | void *memset(void *_dst, int c, size_t len) |
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| 11 | { |
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| 12 | const char val = (char)c; |
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| 13 | |
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| 14 | /* |
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| 15 | * Write 12 bytes when destination buffer is aligned to 4 bytes and length |
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| 16 | * is greater or equal to 12 |
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| 17 | */ |
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| 18 | int *dst = _dst; |
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| 19 | if (!((int)dst & 0x3)) { |
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| 20 | const int word = (val << 24) | (val << 16) | (val << 8) | val; |
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| 21 | while (len > 11) { |
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| 22 | dst[0] = word; |
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| 23 | dst[1] = word; |
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| 24 | dst[2] = word; |
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| 25 | len -= 12; |
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| 26 | dst += 3; |
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| 27 | } |
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| 28 | } |
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| 29 | |
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| 30 | /* |
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| 31 | * Write 1 byte when destination buffer is not aligned to 4 bytes or length |
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| 32 | * is smaller than 4 |
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| 33 | */ |
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| 34 | char *cdst = (char *)dst; |
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| 35 | while (len--) { |
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| 36 | *cdst++ = val; |
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| 37 | } |
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| 38 | |
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| 39 | return _dst; |
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| 40 | } |
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| 41 | |
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| 42 | void *memcpy(void *_dst, const void *_src, size_t n) |
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| 43 | { |
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| 44 | uint8_t *cdst = (uint8_t *)_dst; |
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| 45 | uint8_t *csrc = (uint8_t *)_src; |
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| 46 | while (n--) { |
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| 47 | *cdst++ = *csrc++; |
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| 48 | } |
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| 49 | return _dst; |
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| 50 | }; |
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| 51 | |
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| 52 | /* |
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| 53 | * vim: tabstop=4 : softtabstop=4 : shiftwidth=4 : expandtab |
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| 54 | */ |
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