Searching.c revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
/** @file
Search Functions for <wchar.h>.
Unless explicitly stated otherwise, the functions defined in this file order
two wide characters the same way as two integers of the underlying integer
type designated by wchar_t.
Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Uefi.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <LibConfig.h>
#include <wchar.h>
/* Data initialized by the library constructor */
extern UINT8 *__wchar_bitmap;
extern UINTN __wchar_bitmap_size;
extern UINTN __wchar_bitmap_64;
/** The wcschr function locates the first occurrence of c in the wide string
pointed to by s. The terminating null wide character is considered to be
part of the wide string.
@return The wcschr function returns a pointer to the located wide
character, or a null pointer if the wide character does not occur
in the wide string.
**/
{
do {
if( *s == c) {
return (wchar_t *)s;
}
} while(*s++ != 0);
return NULL;
}
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80
};
#define WHICH8(c) ((unsigned short)(c) >> 3)
static
void
{
//// Initialize bitmap. Bit 0 is always 1 which corresponds to '\0'
//for (BITMAP64[0] = index = 1; index < n; index++)
// BITMAP64[index] = 0;
bitmap[0] = 1;
// Set bits in bitmap corresponding to the characters in s2
}
}
/** The wcscspn function computes the length of the maximum initial segment of
the wide string pointed to by s1 which consists entirely of wide characters
not from the wide string pointed to by s2.
@return The wcscspn function returns the length of the segment.
**/
{
int index;
if(*s1 == 0) return 0;
break;
}
}
/** The wcspbrk function locates the first occurrence in the wide string
pointed to by s1 of any wide character from the wide string
pointed to by s2.
@return The wcspbrk function returns a pointer to the wide character
in s1, or a null pointer if no wide character from s2 occurs
in s1.
**/
{
int index;
}
}
return NULL;
}
/** The wcsrchr function locates the last occurrence of c in the wide string
pointed to by s. The terminating null wide character is considered to be
part of the wide string.
@return The wcsrchr function returns a pointer to the wide character,
or a null pointer if c does not occur in the wide string.
**/
{
do {
} while( *s++ != 0);
return found;
}
/** The wcsspn function computes the length of the maximum initial segment of
the wide string pointed to by s1 which consists entirely of wide characters
from the wide string pointed to by s2.
@return The wcsspn function returns the length of the segment.
**/
{
int index;
++length;
}
return length;
}
/** The wcsstr function locates the first occurrence in the wide string pointed
to by s1 of the sequence of wide characters (excluding the terminating null
wide character) in the wide string pointed to by s2.
@return The wcsstr function returns a pointer to the located wide string,
or a null pointer if the wide string is not found. If s2 points
to a wide string with zero length, the function returns s1.
**/
{
}
/** A sequence of calls to the wcstok function breaks the wide string pointed
to by s1 into a sequence of tokens, each of which is delimited by a wide
character from the wide string pointed to by s2. The third argument points
to a caller-provided wchar_t pointer into which the wcstok function stores
information necessary for it to continue scanning the same wide string.
The first call in a sequence has a non-null first argument and stores an
initial value in the object pointed to by ptr. Subsequent calls in the
sequence have a null first argument and the object pointed to by ptr is
required to have the value stored by the previous call in the sequence,
which is then updated. The separator wide string pointed to by s2 may be
different from call to call.
The first call in the sequence searches the wide string pointed to by s1
for the first wide character that is not contained in the current separator
wide string pointed to by s2. If no such wide character is found, then
there are no tokens in the wide string pointed to by s1 and the wcstok
function returns a null pointer. If such a wide character is found, it is
the start of the first token.
The wcstok function then searches from there for a wide character that is
contained in the current separator wide string. If no such wide character
is found, the current token extends to the end of the wide string pointed
to by s1, and subsequent searches in the same wide string for a token
return a null pointer. If such a wide character is found, it is overwritten
by a null wide character, which terminates the current token.
In all cases, the wcstok function stores sufficient information in the
pointer pointed to by ptr so that subsequent calls, with a null pointer for
s1 and the unmodified pointer value for ptr, shall start searching just
past the element overwritten by a null wide character (if any).
@return The wcstok function returns a pointer to the first wide character
of a token, or a null pointer if there is no token.
**/
{
int index;
{
return NULL;
}
// s2 can be different on each call, so build the bitmap each time.
// skip leading delimiters: all chars in s2
}
if( *s1 != 0)
{
// Remember this point, it is the start of the token
// find the next delimiter and replace it with a '\0'
*s1++ = 0;
return Token;
}
}
}
return Token;
}
/** The wmemchr function locates the first occurrence of c in the initial n
wide characters of the object pointed to by s.
@return The wmemchr function returns a pointer to the located wide
character, or a null pointer if the wide character does not occur
in the object.
**/
{
}