697f42afdb
...by inlining them. Also fix a couple of harmless bugs in passing. I've added tests, but in both cases I don't think it was actually possible to hit the bad behavior: we'd hit another test and fail immediately after in an externally indistinguishable way. Bug: N/A Test: readelf Change-Id: I8466050b0bfe2b7b94c76b383cf10c1d9d28debd
97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
/*
|
|
* Copyright (C) 2014 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <uchar.h>
|
|
#include <wchar.h>
|
|
|
|
#include "private/bionic_mbstate.h"
|
|
|
|
size_t c32rtomb(char* s, char32_t c32, mbstate_t* ps) {
|
|
static mbstate_t __private_state;
|
|
mbstate_t* state = (ps == NULL) ? &__private_state : ps;
|
|
|
|
if (s == NULL) {
|
|
// Equivalent to c32rtomb(buf, U'\0', ps).
|
|
return mbstate_reset_and_return(1, state);
|
|
}
|
|
|
|
// POSIX states that if char32_t is a null wide character, a null byte shall
|
|
// be stored, preceded by any shift sequence needed to restore the initial
|
|
// shift state. Since shift states are not supported, only the null byte is
|
|
// stored.
|
|
if (c32 == U'\0') {
|
|
*s = '\0';
|
|
return mbstate_reset_and_return(1, state);
|
|
}
|
|
|
|
if (!mbsinit(state)) {
|
|
return mbstate_reset_and_return_illegal(EILSEQ, state);
|
|
}
|
|
|
|
if ((c32 & ~0x7f) == 0) {
|
|
// Fast path for plain ASCII characters.
|
|
*s = c32;
|
|
return 1;
|
|
}
|
|
|
|
// Determine the number of octets needed to represent this character.
|
|
// We always output the shortest sequence possible. Also specify the
|
|
// first few bits of the first octet, which contains the information
|
|
// about the sequence length.
|
|
uint8_t lead;
|
|
size_t length;
|
|
if ((c32 & ~0x7f) == 0) {
|
|
lead = 0;
|
|
length = 1;
|
|
} else if ((c32 & ~0x7ff) == 0) {
|
|
lead = 0xc0;
|
|
length = 2;
|
|
} else if ((c32 & ~0xffff) == 0) {
|
|
lead = 0xe0;
|
|
length = 3;
|
|
} else if ((c32 & ~0x1fffff) == 0) {
|
|
lead = 0xf0;
|
|
length = 4;
|
|
} else {
|
|
errno = EILSEQ;
|
|
return __MB_ERR_ILLEGAL_SEQUENCE;
|
|
}
|
|
|
|
// Output the octets representing the character in chunks
|
|
// of 6 bits, least significant last. The first octet is
|
|
// a special case because it contains the sequence length
|
|
// information.
|
|
for (size_t i = length - 1; i > 0; i--) {
|
|
s[i] = (c32 & 0x3f) | 0x80;
|
|
c32 >>= 6;
|
|
}
|
|
*s = (c32 & 0xff) | lead;
|
|
|
|
return length;
|
|
}
|