+++ /dev/null
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License (the "License").
- * You may not use this file except in compliance with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
- */
-
-
-
-/*
- * Unicode encoding conversion functions among UTF-8, UTF-16, and UTF-32.
- * (PSARC/2005/446, PSARC/2007/038, PSARC/2007/517)
- * Man pages: uconv_u16tou32(9F), uconv_u16tou8(9F), uconv_u32tou16(9F),
- * uconv_u32tou8(9F), uconv_u8tou16(9F), and uconv_u8tou32(9F). See also
- * the section 3C man pages.
- * Interface stability: Committed
- */
-
-#include <sys/types.h>
-#ifdef _KERNEL
-#include <sys/param.h>
-#include <sys/sysmacros.h>
-#include <sys/systm.h>
-#include <sys/debug.h>
-#include <sys/kmem.h>
-#include <sys/sunddi.h>
-#else
-#include <sys/u8_textprep.h>
-#endif /* _KERNEL */
-#include <sys/byteorder.h>
-#include <sys/errno.h>
-
-
-/*
- * The max and min values of high and low surrogate pairs of UTF-16,
- * UTF-16 bit shift value, bit mask, and starting value outside of BMP.
- */
-#define UCONV_U16_HI_MIN (0xd800U)
-#define UCONV_U16_HI_MAX (0xdbffU)
-#define UCONV_U16_LO_MIN (0xdc00U)
-#define UCONV_U16_LO_MAX (0xdfffU)
-#define UCONV_U16_BIT_SHIFT (0x0400U)
-#define UCONV_U16_BIT_MASK (0x0fffffU)
-#define UCONV_U16_START (0x010000U)
-
-/* The maximum value of Unicode coding space and ASCII coding space. */
-#define UCONV_UNICODE_MAX (0x10ffffU)
-#define UCONV_ASCII_MAX (0x7fU)
-
-/* The mask values for input and output endians. */
-#define UCONV_IN_ENDIAN_MASKS (UCONV_IN_BIG_ENDIAN | UCONV_IN_LITTLE_ENDIAN)
-#define UCONV_OUT_ENDIAN_MASKS (UCONV_OUT_BIG_ENDIAN | UCONV_OUT_LITTLE_ENDIAN)
-
-/* Native and reversed endian macros. */
-#ifdef _BIG_ENDIAN
-#define UCONV_IN_NAT_ENDIAN UCONV_IN_BIG_ENDIAN
-#define UCONV_IN_REV_ENDIAN UCONV_IN_LITTLE_ENDIAN
-#define UCONV_OUT_NAT_ENDIAN UCONV_OUT_BIG_ENDIAN
-#define UCONV_OUT_REV_ENDIAN UCONV_OUT_LITTLE_ENDIAN
-#else
-#define UCONV_IN_NAT_ENDIAN UCONV_IN_LITTLE_ENDIAN
-#define UCONV_IN_REV_ENDIAN UCONV_IN_BIG_ENDIAN
-#define UCONV_OUT_NAT_ENDIAN UCONV_OUT_LITTLE_ENDIAN
-#define UCONV_OUT_REV_ENDIAN UCONV_OUT_BIG_ENDIAN
-#endif /* _BIG_ENDIAN */
-
-/* The Byte Order Mark (BOM) character in normal and reversed byte orderings. */
-#define UCONV_BOM_NORMAL (0xfeffU)
-#define UCONV_BOM_SWAPPED (0xfffeU)
-#define UCONV_BOM_SWAPPED_32 (0xfffe0000U)
-
-/* UTF-32 boundaries based on UTF-8 character byte lengths. */
-#define UCONV_U8_ONE_BYTE (0x7fU)
-#define UCONV_U8_TWO_BYTES (0x7ffU)
-#define UCONV_U8_THREE_BYTES (0xffffU)
-#define UCONV_U8_FOUR_BYTES (0x10ffffU)
-
-/* The common minimum and maximum values at the UTF-8 character bytes. */
-#define UCONV_U8_BYTE_MIN (0x80U)
-#define UCONV_U8_BYTE_MAX (0xbfU)
-
-/*
- * The following "6" and "0x3f" came from "10xx xxxx" bit representation of
- * UTF-8 character bytes.
- */
-#define UCONV_U8_BIT_SHIFT 6
-#define UCONV_U8_BIT_MASK 0x3f
-
-/*
- * The following vector shows remaining bytes in a UTF-8 character.
- * Index will be the first byte of the character.
- */
-static const uchar_t remaining_bytes_tbl[0x100] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-
-/* C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF */
- 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-
-/* D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-
-/* E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF */
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-
-/* F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF */
- 3, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-/*
- * The following is a vector of bit-masks to get used bits in
- * the first byte of a UTF-8 character. Index is remaining bytes at above of
- * the character.
- */
-#ifdef _KERNEL
-const uchar_t u8_masks_tbl[6] = { 0x00, 0x1f, 0x0f, 0x07, 0x03, 0x01 };
-#else
-static const uchar_t u8_masks_tbl[6] = { 0x00, 0x1f, 0x0f, 0x07, 0x03, 0x01 };
-#endif /* _KERNEL */
-
-/*
- * The following two vectors are to provide valid minimum and
- * maximum values for the 2'nd byte of a multibyte UTF-8 character for
- * better illegal sequence checking. The index value must be the value of
- * the first byte of the UTF-8 character.
- */
-static const uchar_t valid_min_2nd_byte[0x100] = {
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
-
-/* C0 C1 C2 C3 C4 C5 C6 C7 */
- 0, 0, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
-
-/* C8 C9 CA CB CC CD CE CF */
- 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
-
-/* D0 D1 D2 D3 D4 D5 D6 D7 */
- 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
-
-/* D8 D9 DA DB DC DD DE DF */
- 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
-
-/* E0 E1 E2 E3 E4 E5 E6 E7 */
- 0xa0, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
-
-/* E8 E9 EA EB EC ED EE EF */
- 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
-
-/* F0 F1 F2 F3 F4 F5 F6 F7 */
- 0x90, 0x80, 0x80, 0x80, 0x80, 0, 0, 0,
-
- 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-static const uchar_t valid_max_2nd_byte[0x100] = {
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
-
-/* C0 C1 C2 C3 C4 C5 C6 C7 */
- 0, 0, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
-
-/* C8 C9 CA CB CC CD CE CF */
- 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
-
-/* D0 D1 D2 D3 D4 D5 D6 D7 */
- 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
-
-/* D8 D9 DA DB DC DD DE DF */
- 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
-
-/* E0 E1 E2 E3 E4 E5 E6 E7 */
- 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf,
-
-/* E8 E9 EA EB EC ED EE EF */
- 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0x9f, 0xbf, 0xbf,
-
-/* F0 F1 F2 F3 F4 F5 F6 F7 */
- 0xbf, 0xbf, 0xbf, 0xbf, 0x8f, 0, 0, 0,
-
- 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-
-static int
-check_endian(int flag, int *in, int *out)
-{
- *in = flag & UCONV_IN_ENDIAN_MASKS;
-
- /* You cannot have both. */
- if (*in == UCONV_IN_ENDIAN_MASKS)
- return (EBADF);
-
- if (*in == 0)
- *in = UCONV_IN_NAT_ENDIAN;
-
- *out = flag & UCONV_OUT_ENDIAN_MASKS;
-
- /* You cannot have both. */
- if (*out == UCONV_OUT_ENDIAN_MASKS)
- return (EBADF);
-
- if (*out == 0)
- *out = UCONV_OUT_NAT_ENDIAN;
-
- return (0);
-}
-
-static boolean_t
-check_bom16(const uint16_t *u16s, size_t u16l, int *in)
-{
- if (u16l > 0) {
- if (*u16s == UCONV_BOM_NORMAL) {
- *in = UCONV_IN_NAT_ENDIAN;
- return (B_TRUE);
- }
- if (*u16s == UCONV_BOM_SWAPPED) {
- *in = UCONV_IN_REV_ENDIAN;
- return (B_TRUE);
- }
- }
-
- return (B_FALSE);
-}
-
-static boolean_t
-check_bom32(const uint32_t *u32s, size_t u32l, int *in)
-{
- if (u32l > 0) {
- if (*u32s == UCONV_BOM_NORMAL) {
- *in = UCONV_IN_NAT_ENDIAN;
- return (B_TRUE);
- }
- if (*u32s == UCONV_BOM_SWAPPED_32) {
- *in = UCONV_IN_REV_ENDIAN;
- return (B_TRUE);
- }
- }
-
- return (B_FALSE);
-}
-
-int
-uconv_u16tou32(const uint16_t *u16s, size_t *utf16len,
- uint32_t *u32s, size_t *utf32len, int flag)
-{
- int inendian;
- int outendian;
- size_t u16l;
- size_t u32l;
- uint32_t hi;
- uint32_t lo;
- boolean_t do_not_ignore_null;
-
- /*
- * Do preliminary validity checks on parameters and collect info on
- * endians.
- */
- if (u16s == NULL || utf16len == NULL)
- return (EILSEQ);
-
- if (u32s == NULL || utf32len == NULL)
- return (E2BIG);
-
- if (check_endian(flag, &inendian, &outendian) != 0)
- return (EBADF);
-
- /*
- * Initialize input and output parameter buffer indices and
- * temporary variables.
- */
- u16l = u32l = 0;
- hi = 0;
- do_not_ignore_null = ((flag & UCONV_IGNORE_NULL) == 0);
-
- /*
- * Check on the BOM at the beginning of the input buffer if required
- * and if there is indeed one, process it.
- */
- if ((flag & UCONV_IN_ACCEPT_BOM) &&
- check_bom16(u16s, *utf16len, &inendian))
- u16l++;
-
- /*
- * Reset inendian and outendian so that after this point, those can be
- * used as condition values.
- */
- inendian &= UCONV_IN_NAT_ENDIAN;
- outendian &= UCONV_OUT_NAT_ENDIAN;
-
- /*
- * If there is something in the input buffer and if necessary and
- * requested, save the BOM at the output buffer.
- */
- if (*utf16len > 0 && *utf32len > 0 && (flag & UCONV_OUT_EMIT_BOM))
- u32s[u32l++] = (outendian) ? UCONV_BOM_NORMAL :
- UCONV_BOM_SWAPPED_32;
-
- /*
- * Do conversion; if encounter a surrogate pair, assemble high and
- * low pair values to form a UTF-32 character. If a half of a pair
- * exists alone, then, either it is an illegal (EILSEQ) or
- * invalid (EINVAL) value.
- */
- for (; u16l < *utf16len; u16l++) {
- if (u16s[u16l] == 0 && do_not_ignore_null)
- break;
-
- lo = (uint32_t)((inendian) ? u16s[u16l] : BSWAP_16(u16s[u16l]));
-
- if (lo >= UCONV_U16_HI_MIN && lo <= UCONV_U16_HI_MAX) {
- if (hi)
- return (EILSEQ);
- hi = lo;
- continue;
- } else if (lo >= UCONV_U16_LO_MIN && lo <= UCONV_U16_LO_MAX) {
- if (! hi)
- return (EILSEQ);
- lo = (((hi - UCONV_U16_HI_MIN) * UCONV_U16_BIT_SHIFT +
- lo - UCONV_U16_LO_MIN) & UCONV_U16_BIT_MASK)
- + UCONV_U16_START;
- hi = 0;
- } else if (hi) {
- return (EILSEQ);
- }
-
- if (u32l >= *utf32len)
- return (E2BIG);
-
- u32s[u32l++] = (outendian) ? lo : BSWAP_32(lo);
- }
-
- /*
- * If high half didn't see low half, then, it's most likely the input
- * parameter is incomplete.
- */
- if (hi)
- return (EINVAL);
-
- /*
- * Save the number of consumed and saved characters. They do not
- * include terminating NULL character (U+0000) at the end of
- * the input buffer (even when UCONV_IGNORE_NULL isn't specified and
- * the input buffer length is big enough to include the terminating
- * NULL character).
- */
- *utf16len = u16l;
- *utf32len = u32l;
-
- return (0);
-}
-
-int
-uconv_u16tou8(const uint16_t *u16s, size_t *utf16len,
- uchar_t *u8s, size_t *utf8len, int flag)
-{
- int inendian;
- int outendian;
- size_t u16l;
- size_t u8l;
- uint32_t hi;
- uint32_t lo;
- boolean_t do_not_ignore_null;
-
- if (u16s == NULL || utf16len == NULL)
- return (EILSEQ);
-
- if (u8s == NULL || utf8len == NULL)
- return (E2BIG);
-
- if (check_endian(flag, &inendian, &outendian) != 0)
- return (EBADF);
-
- u16l = u8l = 0;
- hi = 0;
- do_not_ignore_null = ((flag & UCONV_IGNORE_NULL) == 0);
-
- if ((flag & UCONV_IN_ACCEPT_BOM) &&
- check_bom16(u16s, *utf16len, &inendian))
- u16l++;
-
- inendian &= UCONV_IN_NAT_ENDIAN;
-
- for (; u16l < *utf16len; u16l++) {
- if (u16s[u16l] == 0 && do_not_ignore_null)
- break;
-
- lo = (uint32_t)((inendian) ? u16s[u16l] : BSWAP_16(u16s[u16l]));
-
- if (lo >= UCONV_U16_HI_MIN && lo <= UCONV_U16_HI_MAX) {
- if (hi)
- return (EILSEQ);
- hi = lo;
- continue;
- } else if (lo >= UCONV_U16_LO_MIN && lo <= UCONV_U16_LO_MAX) {
- if (! hi)
- return (EILSEQ);
- lo = (((hi - UCONV_U16_HI_MIN) * UCONV_U16_BIT_SHIFT +
- lo - UCONV_U16_LO_MIN) & UCONV_U16_BIT_MASK)
- + UCONV_U16_START;
- hi = 0;
- } else if (hi) {
- return (EILSEQ);
- }
-
- /*
- * Now we convert a UTF-32 character into a UTF-8 character.
- * Unicode coding space is between U+0000 and U+10FFFF;
- * anything bigger is an illegal character.
- */
- if (lo <= UCONV_U8_ONE_BYTE) {
- if (u8l >= *utf8len)
- return (E2BIG);
- u8s[u8l++] = (uchar_t)lo;
- } else if (lo <= UCONV_U8_TWO_BYTES) {
- if ((u8l + 1) >= *utf8len)
- return (E2BIG);
- u8s[u8l++] = (uchar_t)(0xc0 | ((lo & 0x07c0) >> 6));
- u8s[u8l++] = (uchar_t)(0x80 | (lo & 0x003f));
- } else if (lo <= UCONV_U8_THREE_BYTES) {
- if ((u8l + 2) >= *utf8len)
- return (E2BIG);
- u8s[u8l++] = (uchar_t)(0xe0 | ((lo & 0x0f000) >> 12));
- u8s[u8l++] = (uchar_t)(0x80 | ((lo & 0x00fc0) >> 6));
- u8s[u8l++] = (uchar_t)(0x80 | (lo & 0x0003f));
- } else if (lo <= UCONV_U8_FOUR_BYTES) {
- if ((u8l + 3) >= *utf8len)
- return (E2BIG);
- u8s[u8l++] = (uchar_t)(0xf0 | ((lo & 0x01c0000) >> 18));
- u8s[u8l++] = (uchar_t)(0x80 | ((lo & 0x003f000) >> 12));
- u8s[u8l++] = (uchar_t)(0x80 | ((lo & 0x0000fc0) >> 6));
- u8s[u8l++] = (uchar_t)(0x80 | (lo & 0x000003f));
- } else {
- return (EILSEQ);
- }
- }
-
- if (hi)
- return (EINVAL);
-
- *utf16len = u16l;
- *utf8len = u8l;
-
- return (0);
-}
-
-int
-uconv_u32tou16(const uint32_t *u32s, size_t *utf32len,
- uint16_t *u16s, size_t *utf16len, int flag)
-{
- int inendian;
- int outendian;
- size_t u16l;
- size_t u32l;
- uint32_t hi;
- uint32_t lo;
- boolean_t do_not_ignore_null;
-
- if (u32s == NULL || utf32len == NULL)
- return (EILSEQ);
-
- if (u16s == NULL || utf16len == NULL)
- return (E2BIG);
-
- if (check_endian(flag, &inendian, &outendian) != 0)
- return (EBADF);
-
- u16l = u32l = 0;
- do_not_ignore_null = ((flag & UCONV_IGNORE_NULL) == 0);
-
- if ((flag & UCONV_IN_ACCEPT_BOM) &&
- check_bom32(u32s, *utf32len, &inendian))
- u32l++;
-
- inendian &= UCONV_IN_NAT_ENDIAN;
- outendian &= UCONV_OUT_NAT_ENDIAN;
-
- if (*utf32len > 0 && *utf16len > 0 && (flag & UCONV_OUT_EMIT_BOM))
- u16s[u16l++] = (outendian) ? UCONV_BOM_NORMAL :
- UCONV_BOM_SWAPPED;
-
- for (; u32l < *utf32len; u32l++) {
- if (u32s[u32l] == 0 && do_not_ignore_null)
- break;
-
- hi = (inendian) ? u32s[u32l] : BSWAP_32(u32s[u32l]);
-
- /*
- * Anything bigger than the Unicode coding space, i.e.,
- * Unicode scalar value bigger than U+10FFFF, is an illegal
- * character.
- */
- if (hi > UCONV_UNICODE_MAX)
- return (EILSEQ);
-
- /*
- * Anything bigger than U+FFFF must be converted into
- * a surrogate pair in UTF-16.
- */
- if (hi >= UCONV_U16_START) {
- lo = ((hi - UCONV_U16_START) % UCONV_U16_BIT_SHIFT) +
- UCONV_U16_LO_MIN;
- hi = ((hi - UCONV_U16_START) / UCONV_U16_BIT_SHIFT) +
- UCONV_U16_HI_MIN;
-
- if ((u16l + 1) >= *utf16len)
- return (E2BIG);
-
- if (outendian) {
- u16s[u16l++] = (uint16_t)hi;
- u16s[u16l++] = (uint16_t)lo;
- } else {
- u16s[u16l++] = BSWAP_16(((uint16_t)hi));
- u16s[u16l++] = BSWAP_16(((uint16_t)lo));
- }
- } else {
- if (u16l >= *utf16len)
- return (E2BIG);
- u16s[u16l++] = (outendian) ? (uint16_t)hi :
- BSWAP_16(((uint16_t)hi));
- }
- }
-
- *utf16len = u16l;
- *utf32len = u32l;
-
- return (0);
-}
-
-int
-uconv_u32tou8(const uint32_t *u32s, size_t *utf32len,
- uchar_t *u8s, size_t *utf8len, int flag)
-{
- int inendian;
- int outendian;
- size_t u32l;
- size_t u8l;
- uint32_t lo;
- boolean_t do_not_ignore_null;
-
- if (u32s == NULL || utf32len == NULL)
- return (EILSEQ);
-
- if (u8s == NULL || utf8len == NULL)
- return (E2BIG);
-
- if (check_endian(flag, &inendian, &outendian) != 0)
- return (EBADF);
-
- u32l = u8l = 0;
- do_not_ignore_null = ((flag & UCONV_IGNORE_NULL) == 0);
-
- if ((flag & UCONV_IN_ACCEPT_BOM) &&
- check_bom32(u32s, *utf32len, &inendian))
- u32l++;
-
- inendian &= UCONV_IN_NAT_ENDIAN;
-
- for (; u32l < *utf32len; u32l++) {
- if (u32s[u32l] == 0 && do_not_ignore_null)
- break;
-
- lo = (inendian) ? u32s[u32l] : BSWAP_32(u32s[u32l]);
-
- if (lo <= UCONV_U8_ONE_BYTE) {
- if (u8l >= *utf8len)
- return (E2BIG);
- u8s[u8l++] = (uchar_t)lo;
- } else if (lo <= UCONV_U8_TWO_BYTES) {
- if ((u8l + 1) >= *utf8len)
- return (E2BIG);
- u8s[u8l++] = (uchar_t)(0xc0 | ((lo & 0x07c0) >> 6));
- u8s[u8l++] = (uchar_t)(0x80 | (lo & 0x003f));
- } else if (lo <= UCONV_U8_THREE_BYTES) {
- if ((u8l + 2) >= *utf8len)
- return (E2BIG);
- u8s[u8l++] = (uchar_t)(0xe0 | ((lo & 0x0f000) >> 12));
- u8s[u8l++] = (uchar_t)(0x80 | ((lo & 0x00fc0) >> 6));
- u8s[u8l++] = (uchar_t)(0x80 | (lo & 0x0003f));
- } else if (lo <= UCONV_U8_FOUR_BYTES) {
- if ((u8l + 3) >= *utf8len)
- return (E2BIG);
- u8s[u8l++] = (uchar_t)(0xf0 | ((lo & 0x01c0000) >> 18));
- u8s[u8l++] = (uchar_t)(0x80 | ((lo & 0x003f000) >> 12));
- u8s[u8l++] = (uchar_t)(0x80 | ((lo & 0x0000fc0) >> 6));
- u8s[u8l++] = (uchar_t)(0x80 | (lo & 0x000003f));
- } else {
- return (EILSEQ);
- }
- }
-
- *utf32len = u32l;
- *utf8len = u8l;
-
- return (0);
-}
-
-int
-uconv_u8tou16(const uchar_t *u8s, size_t *utf8len,
- uint16_t *u16s, size_t *utf16len, int flag)
-{
- int inendian;
- int outendian;
- size_t u16l;
- size_t u8l;
- uint32_t hi;
- uint32_t lo;
- int remaining_bytes;
- int first_b;
- boolean_t do_not_ignore_null;
-
- if (u8s == NULL || utf8len == NULL)
- return (EILSEQ);
-
- if (u16s == NULL || utf16len == NULL)
- return (E2BIG);
-
- if (check_endian(flag, &inendian, &outendian) != 0)
- return (EBADF);
-
- u16l = u8l = 0;
- do_not_ignore_null = ((flag & UCONV_IGNORE_NULL) == 0);
-
- outendian &= UCONV_OUT_NAT_ENDIAN;
-
- if (*utf8len > 0 && *utf16len > 0 && (flag & UCONV_OUT_EMIT_BOM))
- u16s[u16l++] = (outendian) ? UCONV_BOM_NORMAL :
- UCONV_BOM_SWAPPED;
-
- for (; u8l < *utf8len; ) {
- if (u8s[u8l] == 0 && do_not_ignore_null)
- break;
-
- /*
- * Collect a UTF-8 character and convert it to a UTF-32
- * character. In doing so, we screen out illegally formed
- * UTF-8 characters and treat such as illegal characters.
- * The algorithm at below also screens out anything bigger
- * than the U+10FFFF.
- *
- * See Unicode 3.1 UTF-8 Corrigendum and Unicode 3.2 for
- * more details on the illegal values of UTF-8 character
- * bytes.
- */
- hi = (uint32_t)u8s[u8l++];
-
- if (hi > UCONV_ASCII_MAX) {
- if ((remaining_bytes = remaining_bytes_tbl[hi]) == 0)
- return (EILSEQ);
-
- first_b = hi;
- hi = hi & u8_masks_tbl[remaining_bytes];
-
- for (; remaining_bytes > 0; remaining_bytes--) {
- /*
- * If we have no more bytes, the current
- * UTF-8 character is incomplete.
- */
- if (u8l >= *utf8len)
- return (EINVAL);
-
- lo = (uint32_t)u8s[u8l++];
-
- if (first_b) {
- if (lo < valid_min_2nd_byte[first_b] ||
- lo > valid_max_2nd_byte[first_b])
- return (EILSEQ);
- first_b = 0;
- } else if (lo < UCONV_U8_BYTE_MIN ||
- lo > UCONV_U8_BYTE_MAX) {
- return (EILSEQ);
- }
- hi = (hi << UCONV_U8_BIT_SHIFT) |
- (lo & UCONV_U8_BIT_MASK);
- }
- }
-
- if (hi >= UCONV_U16_START) {
- lo = ((hi - UCONV_U16_START) % UCONV_U16_BIT_SHIFT) +
- UCONV_U16_LO_MIN;
- hi = ((hi - UCONV_U16_START) / UCONV_U16_BIT_SHIFT) +
- UCONV_U16_HI_MIN;
-
- if ((u16l + 1) >= *utf16len)
- return (E2BIG);
-
- if (outendian) {
- u16s[u16l++] = (uint16_t)hi;
- u16s[u16l++] = (uint16_t)lo;
- } else {
- u16s[u16l++] = BSWAP_16(((uint16_t)hi));
- u16s[u16l++] = BSWAP_16(((uint16_t)lo));
- }
- } else {
- if (u16l >= *utf16len)
- return (E2BIG);
-
- u16s[u16l++] = (outendian) ? (uint16_t)hi :
- BSWAP_16(((uint16_t)hi));
- }
- }
-
- *utf16len = u16l;
- *utf8len = u8l;
-
- return (0);
-}
-
-int
-uconv_u8tou32(const uchar_t *u8s, size_t *utf8len,
- uint32_t *u32s, size_t *utf32len, int flag)
-{
- int inendian;
- int outendian;
- size_t u32l;
- size_t u8l;
- uint32_t hi;
- uint32_t c;
- int remaining_bytes;
- int first_b;
- boolean_t do_not_ignore_null;
-
- if (u8s == NULL || utf8len == NULL)
- return (EILSEQ);
-
- if (u32s == NULL || utf32len == NULL)
- return (E2BIG);
-
- if (check_endian(flag, &inendian, &outendian) != 0)
- return (EBADF);
-
- u32l = u8l = 0;
- do_not_ignore_null = ((flag & UCONV_IGNORE_NULL) == 0);
-
- outendian &= UCONV_OUT_NAT_ENDIAN;
-
- if (*utf8len > 0 && *utf32len > 0 && (flag & UCONV_OUT_EMIT_BOM))
- u32s[u32l++] = (outendian) ? UCONV_BOM_NORMAL :
- UCONV_BOM_SWAPPED_32;
-
- for (; u8l < *utf8len; ) {
- if (u8s[u8l] == 0 && do_not_ignore_null)
- break;
-
- hi = (uint32_t)u8s[u8l++];
-
- if (hi > UCONV_ASCII_MAX) {
- if ((remaining_bytes = remaining_bytes_tbl[hi]) == 0)
- return (EILSEQ);
-
- first_b = hi;
- hi = hi & u8_masks_tbl[remaining_bytes];
-
- for (; remaining_bytes > 0; remaining_bytes--) {
- if (u8l >= *utf8len)
- return (EINVAL);
-
- c = (uint32_t)u8s[u8l++];
-
- if (first_b) {
- if (c < valid_min_2nd_byte[first_b] ||
- c > valid_max_2nd_byte[first_b])
- return (EILSEQ);
- first_b = 0;
- } else if (c < UCONV_U8_BYTE_MIN ||
- c > UCONV_U8_BYTE_MAX) {
- return (EILSEQ);
- }
- hi = (hi << UCONV_U8_BIT_SHIFT) |
- (c & UCONV_U8_BIT_MASK);
- }
- }
-
- if (u32l >= *utf32len)
- return (E2BIG);
-
- u32s[u32l++] = (outendian) ? hi : BSWAP_32(hi);
- }
-
- *utf32len = u32l;
- *utf8len = u8l;
-
- return (0);
-}
-
-#if defined(_KERNEL) && defined(HAVE_SPL)
-EXPORT_SYMBOL(uconv_u16tou32);
-EXPORT_SYMBOL(uconv_u16tou8);
-EXPORT_SYMBOL(uconv_u32tou16);
-EXPORT_SYMBOL(uconv_u32tou8);
-EXPORT_SYMBOL(uconv_u8tou16);
-EXPORT_SYMBOL(uconv_u8tou32);
-#endif
projects / mirror_ubuntu-bionic-kernel.git / blobdiff