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// SPDX-License-Identifier: BSD-2-Clause-Patent
/*
* ucs2.h - UCS-2 string functions
* Copyright Red Hat, Inc
* Copyright Peter Jones <pjones@redhat.com>
*/
#ifndef SHIM_UCS2_H
#define SHIM_UCS2_H
#include <stdbool.h>
static inline INTN
__attribute__((unused))
StrCaseCmp(CHAR16 *s0, CHAR16 *s1)
{
CHAR16 c0, c1;
while (1) {
if (*s0 == L'\0' || *s1 == L'\0')
return *s1 - *s0;
c0 = (*s0 >= L'a' && *s0 <= L'z') ? *s0 - 32 : *s0;
c1 = (*s1 >= L'a' && *s1 <= L'z') ? *s1 - 32 : *s1;
if (c0 != c1)
return c1 - c0;
s0++;
s1++;
}
return 0;
}
static inline INTN
__attribute__((unused))
StrnCaseCmp(CHAR16 *s0, CHAR16 *s1, int n)
{
CHAR16 c0, c1;
int x = 0;
while (n > x++) {
if (*s0 == L'\0' || *s1 == L'\0')
return *s1 - *s0;
c0 = (*s0 >= L'a' && *s0 <= L'z') ? *s0 - 32 : *s0;
c1 = (*s1 >= L'a' && *s1 <= L'z') ? *s1 - 32 : *s1;
if (c0 != c1)
return c1 - c0;
s0++;
s1++;
}
return 0;
}
static inline UINTN
__attribute__((unused))
StrCSpn(const CHAR16 *s, const CHAR16 *reject)
{
UINTN ret;
for (ret = 0; s[ret] != L'\0'; ret++) {
int i;
for (i = 0; reject[i] != L'\0'; i++) {
if (reject[i] == s[ret])
return ret;
}
}
return ret;
}
/*
* Test if an entire buffer is nothing but NUL characters. This
* implementation "gracefully" ignores the difference between the
* UTF-8/ASCII 1-byte NUL and the UCS-2 2-byte NUL.
*/
static inline bool
__attribute__((__unused__))
is_all_nuls(UINT8 *data, UINTN data_size)
{
UINTN i;
for (i = 0; i < data_size; i++) {
if (data[i] != 0)
return false;
}
return true;
}
#endif /* SHIM_UCS2_H */
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