Commit 9befdf1d authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

New utility function to reverse a buffer, either by copying or in-place.

parent 75d44c04

crypto/buffer/buffer.c

+23 −0
Original line number Diff line number Diff line
@@ -219,3 +219,26 @@ size_t BUF_strlcat(char *dst, const char *src, size_t size) 
		l++;

	return l + BUF_strlcpy(dst, src, size);

	}



void BUF_reverse(unsigned char *out, unsigned char *in, size_t size)

	{

	size_t i;

	if (in)

		{

		out += size - 1;

		for (i = 0; i < size; i++)

			*in++ = *out--;

		}

	else

		{

		unsigned char *q;

		char c;

		q = out + size - 1;

		for (i = 0; i < size/2; i++)

			{

			c = *q;

			*q-- = *out;

			*out++ = c;

			}

		}

	}

crypto/buffer/buffer.h

+1 −0
Original line number Diff line number Diff line
@@ -88,6 +88,7 @@ int BUF_MEM_grow_clean(BUF_MEM *str, int len); 
char *	BUF_strdup(const char *str);

char *	BUF_strndup(const char *str, size_t siz);

void *	BUF_memdup(const void *data, size_t siz);

void	BUF_reverse(unsigned char *out, unsigned char *in, size_t siz);



/* safe string functions */

size_t BUF_strlcpy(char *dst,const char *src,size_t siz);