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Convert bitfields to integers in a safe way.

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This is commit eb391c52ee redone, but without the
non-standard anonymous union.
This commit is contained in:
Guus Sliepen 2009-09-09 12:04:08 +02:00
parent 9b394bc887
commit 81afa26e4a
4 changed files with 11 additions and 2 deletions
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7
lib/utils.c
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@ -100,3 +100,10 @@ const char *winerror(int err) {
}
#endif
unsigned int bitfield_to_int(void *bitfield, size_t size) {
unsigned int value = 0;
if(size > sizeof value)
size = sizeof value;
memcpy(&value, bitfield, size);
return value;
}

2
lib/utils.h
View file

@ -43,4 +43,6 @@ extern const char *winerror(int);
#define strerror(x) ((x)>0?strerror(x):winerror(GetLastError()))
#endif
extern unsigned int bitfield_to_int(void *bitfield, size_t size);
#endif /* __TINC_UTILS_H__ */