URL https://opencores.org/ocsvn/or1k_old/or1k_old/trunk

Subversion Repositories or1k_old

[/] [or1k_old/] [trunk/] [newlib/] [newlib/] [libc/] [string/] [strlen.c] - Diff between revs 39 and 56

Rev 39	Rev 56
Line 55...	Line 55...

`size_t`	`size_t`
`_DEFUN (strlen, (str),`	`_DEFUN (strlen, (str),`
`_CONST char *str)`	`_CONST char *str)`
`{`	`{`
`#ifdef PREFER_SIZE_OVER_SPEED`	`#if defined(PREFER_SIZE_OVER_SPEED) \|\| defined(__OPTIMIZE_SIZE__)`
`_CONST char *start = str;`	`_CONST char *start = str;`

`while (*str)`	`while (*str)`
`str++;`	`str++;`

`return str - start;`	`return str - start;`
`#else`	`#else`
`_CONST char *start = str;`	`_CONST char *start = str;`
`unsigned long *aligned_addr;`	`unsigned long *aligned_addr;`

`if (UNALIGNED (str))`	`if (!UNALIGNED (str))`
`{`	`{`
`while (*str)`
`str++;`
`return str - start;`
`}`

`/* If the string is word-aligned, we can check for the presence of`	`/* If the string is word-aligned, we can check for the presence of`
`a null in each word-sized block. */`	`a null in each word-sized block. */`
`aligned_addr = (unsigned long*)str;`	`aligned_addr = (unsigned long*)str;`
`while (!DETECTNULL (*aligned_addr))`	`while (!DETECTNULL (*aligned_addr))`
`aligned_addr++;`	`aligned_addr++;`

`/* Once a null is detected, we check each byte in that block for a`	`/* Once a null is detected, we check each byte in that block for a`
`precise position of the null. */`	`precise position of the null. */`
`str = (char*)aligned_addr;`	`str = (char*)aligned_addr;`
	`}`

`while (*str)`	`while (*str)`
`str++;`	`str++;`
`return str - start;`	`return str - start;`
`#endif /* not PREFER_SIZE_OVER_SPEED */`	`#endif /* not PREFER_SIZE_OVER_SPEED */`
`}`	`}`