/*
- * encoding.c: Convert UTF-8 to UTF-16LE strings and vice versa
+ * encoding.c
*/
/*
- * Copyright (C) 2012 Eric Biggers
+ * Copyright (C) 2012, 2013 Eric Biggers
*
- * This file is part of wimlib, a library for working with WIM files.
+ * This file is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option) any
+ * later version.
*
- * wimlib is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 3 of the License, or (at your option)
- * any later version.
- *
- * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- * A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * This file is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
- * You should have received a copy of the GNU General Public License
- * along with wimlib; if not, see http://www.gnu.org/licenses/.
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this file; if not, see http://www.gnu.org/licenses/.
*/
-#include "wimlib.h"
-#include "util.h"
-#include "endianness.h"
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
#include <errno.h>
-
-#ifdef WITH_NTFS_3G
-#include <ntfs-3g/volume.h>
-#include <ntfs-3g/unistr.h>
-#else
#include <iconv.h>
-#endif
+#include <pthread.h>
+#include <string.h>
-/*
- * NOTE:
- *
- * utf16_to_utf8_size() and utf8_to_utf16_size() were taken from
- * libntfs-3g/unistr.c in the NTFS-3g sources. (Modified slightly to remove
- * unneeded functionality.)
- */
-#ifndef WITH_NTFS_3G
-/*
- * Return the amount of 8-bit elements in UTF-8 needed (without the terminating
- * null) to store a given UTF-16LE string.
- *
- * Return -1 with errno set if string has invalid byte sequence or too long.
- */
-static int utf16_to_utf8_size(const u16 *ins, const int ins_len)
-{
- int i, ret = -1;
- int count = 0;
- bool surrog;
-
- surrog = false;
- for (i = 0; i < ins_len && ins[i]; i++) {
- unsigned short c = le16_to_cpu(ins[i]);
- if (surrog) {
- if ((c >= 0xdc00) && (c < 0xe000)) {
- surrog = false;
- count += 4;
- } else
- goto fail;
- } else
- if (c < 0x80)
- count++;
- else if (c < 0x800)
- count += 2;
- else if (c < 0xd800)
- count += 3;
- else if (c < 0xdc00)
- surrog = true;
-#if NOREVBOM
- else if ((c >= 0xe000) && (c < 0xfffe))
-#else
- else if (c >= 0xe000)
-#endif
- count += 3;
- else
- goto fail;
- }
- if (surrog)
- goto fail;
-
- ret = count;
-out:
- return ret;
-fail:
- errno = EILSEQ;
- goto out;
+#include "wimlib.h"
+#include "wimlib/alloca.h"
+#include "wimlib/assert.h"
+#include "wimlib/encoding.h"
+#include "wimlib/endianness.h"
+#include "wimlib/error.h"
+#include "wimlib/list.h"
+#include "wimlib/util.h"
+
+
+bool wimlib_mbs_is_utf8 = !TCHAR_IS_UTF16LE;
+
+/* List of iconv_t conversion descriptors for a specific character conversion.
+ * The idea is that it is not thread-safe to have just one conversion
+ * descriptor, but it also is inefficient to open a new conversion descriptor to
+ * convert every string. Both these problems can be solved by maintaining a
+ * list of conversion descriptors; then, a thread can use an existing conversion
+ * descriptor if available. */
+struct iconv_list_head {
+ const char *from_encoding;
+ const char *to_encoding;
+ struct list_head list;
+ pthread_mutex_t mutex;
+};
+
+struct iconv_node {
+ iconv_t cd;
+ struct list_head list;
+ struct iconv_list_head *head;
+};
+
+#define ICONV_LIST(name, from, to) \
+struct iconv_list_head name = { \
+ .from_encoding = from, \
+ .to_encoding = to, \
}
-/*
- * Return the amount of 16-bit elements in UTF-16LE needed
- * (without the terminating null) to store given UTF-8 string.
- *
- * Return -1 with errno set if it's longer than PATH_MAX or string is invalid.
- *
- * Note: This does not check whether the input sequence is a valid utf8 string,
- * and should be used only in context where such check is made!
- */
-static int utf8_to_utf16_size(const char *s)
+static iconv_t *
+get_iconv(struct iconv_list_head *head)
{
- unsigned int byte;
- size_t count = 0;
- while ((byte = *((const unsigned char *)s++))) {
- count++;
- if (byte >= 0xc0) {
- if (byte >= 0xF5) {
- errno = EILSEQ;
- return -1;
- }
- if (!*s)
- break;
- if (byte >= 0xC0)
- s++;
- if (!*s)
- break;
- if (byte >= 0xE0)
- s++;
- if (!*s)
- break;
- if (byte >= 0xF0) {
- s++;
- count++;
+ iconv_t cd;
+ iconv_t *cd_p;
+ struct iconv_node *i;
+
+ pthread_mutex_lock(&head->mutex);
+ if (list_empty(&head->list)) {
+ cd = iconv_open(head->to_encoding, head->from_encoding);
+ if (cd == (iconv_t)-1) {
+ ERROR_WITH_ERRNO("Failed to open iconv from %s to %s",
+ head->from_encoding, head->to_encoding);
+ cd_p = NULL;
+ } else {
+ i = MALLOC(sizeof(struct iconv_node));
+ if (i) {
+ i->head = head;
+ i->cd = cd;
+ cd_p = &i->cd;
+ } else {
+ iconv_close(cd);
+ cd_p = NULL;
}
}
+ } else {
+ i = container_of(head->list.next, struct iconv_node, list);
+ list_del(head->list.next);
+ cd_p = &i->cd;
}
- return count;
+ pthread_mutex_unlock(&head->mutex);
+ return cd_p;
}
-#endif /* !WITH_NTFS_3G */
-#ifndef WITH_NTFS_3G
-static iconv_t cd_utf8_to_utf16 = (iconv_t)(-1);
-static iconv_t cd_utf16_to_utf8 = (iconv_t)(-1);
+static void
+put_iconv(iconv_t *cd)
+{
+ int errno_save = errno;
+ struct iconv_node *i = container_of(cd, struct iconv_node, cd);
+ struct iconv_list_head *head = i->head;
+
+ pthread_mutex_lock(&head->mutex);
+ list_add(&i->list, &head->list);
+ pthread_mutex_unlock(&head->mutex);
+ errno = errno_save;
+}
+
+#define DEFINE_CHAR_CONVERSION_FUNCTIONS(varname1, longname1, chartype1,\
+ varname2, longname2, chartype2,\
+ earlyreturn_on_utf8_locale, \
+ earlyreturn_expr, \
+ worst_case_len_expr, \
+ err_return, \
+ err_msg, \
+ modifier) \
+static ICONV_LIST(iconv_##varname1##_to_##varname2, \
+ longname1, longname2); \
+ \
+modifier int \
+varname1##_to_##varname2##_nbytes(const chartype1 *in, size_t in_nbytes,\
+ size_t *out_nbytes_ret) \
+{ \
+ iconv_t *cd = get_iconv(&iconv_##varname1##_to_##varname2); \
+ if (cd == NULL) \
+ return WIMLIB_ERR_ICONV_NOT_AVAILABLE; \
+ \
+ chartype2 *buf; \
+ size_t bufsize; \
+ bool buf_onheap; \
+ bufsize = (worst_case_len_expr) * sizeof(chartype2); \
+ /* Worst case length */ \
+ if (bufsize <= STACK_MAX) { \
+ buf = alloca(bufsize); \
+ buf_onheap = false; \
+ } else { \
+ buf = MALLOC(bufsize); \
+ if (!buf) \
+ return WIMLIB_ERR_NOMEM; \
+ buf_onheap = true; \
+ } \
+ \
+ char *inbuf = (char*)in; \
+ size_t inbytesleft = in_nbytes; \
+ char *outbuf = (char*)buf; \
+ size_t outbytesleft = bufsize; \
+ size_t len; \
+ int ret; \
+ \
+ len = iconv(*cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft); \
+ if (len == (size_t)-1) { \
+ err_msg; \
+ ret = err_return; \
+ } else { \
+ *out_nbytes_ret = bufsize - outbytesleft; \
+ ret = 0; \
+ } \
+ put_iconv(cd); \
+ if (buf_onheap) \
+ FREE(buf); \
+ return ret; \
+} \
+ \
+modifier int \
+varname1##_to_##varname2##_buf(const chartype1 *in, size_t in_nbytes, \
+ chartype2 *out) \
+{ \
+ iconv_t *cd = get_iconv(&iconv_##varname1##_to_##varname2); \
+ if (cd == NULL) \
+ return WIMLIB_ERR_ICONV_NOT_AVAILABLE; \
+ \
+ char *inbuf = (char*)in; \
+ size_t inbytesleft = in_nbytes; \
+ char *outbuf = (char*)out; \
+ const size_t LARGE_NUMBER = 1000000000; \
+ size_t outbytesleft = LARGE_NUMBER; \
+ size_t len; \
+ int ret; \
+ \
+ len = iconv(*cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft); \
+ if (len == (size_t)-1) { \
+ err_msg; \
+ ret = err_return; \
+ } else { \
+ out[(LARGE_NUMBER-outbytesleft)/sizeof(chartype2)] = 0; \
+ ret = 0; \
+ } \
+ put_iconv(cd); \
+ return ret; \
+} \
+ \
+modifier int \
+varname1##_to_##varname2(const chartype1 *in, size_t in_nbytes, \
+ chartype2 **out_ret, \
+ size_t *out_nbytes_ret) \
+{ \
+ int ret; \
+ chartype2 *out; \
+ size_t out_nbytes; \
+ \
+ if (earlyreturn_on_utf8_locale && wimlib_mbs_is_utf8) { \
+ earlyreturn_expr; \
+ /* Out same as in */ \
+ out = MALLOC(in_nbytes + sizeof(chartype2)); \
+ if (!out) \
+ return WIMLIB_ERR_NOMEM; \
+ memcpy(out, in, in_nbytes); \
+ out[in_nbytes / sizeof(chartype2)] = 0; \
+ *out_ret = out; \
+ *out_nbytes_ret = in_nbytes; \
+ return 0; \
+ } \
+ \
+ ret = varname1##_to_##varname2##_nbytes(in, in_nbytes, \
+ &out_nbytes); \
+ if (ret) \
+ return ret; \
+ \
+ out = MALLOC(out_nbytes + sizeof(chartype2)); \
+ if (!out) \
+ return WIMLIB_ERR_NOMEM; \
+ \
+ ret = varname1##_to_##varname2##_buf(in, in_nbytes, out); \
+ if (ret) { \
+ FREE(out); \
+ } else { \
+ *out_ret = out; \
+ *out_nbytes_ret = out_nbytes; \
+ } \
+ return ret; \
+}
+
+#if !TCHAR_IS_UTF16LE
+
+/* UNIX */
+
+DEFINE_CHAR_CONVERSION_FUNCTIONS(utf8, "UTF-8", tchar,
+ utf16le, "UTF-16LE", utf16lechar,
+ false,
+ ,
+ in_nbytes * 2,
+ WIMLIB_ERR_INVALID_UTF8_STRING,
+ ERROR_WITH_ERRNO("Failed to convert UTF-8 string "
+ "to UTF-16LE string!"),
+ static)
+
+DEFINE_CHAR_CONVERSION_FUNCTIONS(utf16le, "UTF-16LE", utf16lechar,
+ utf8, "UTF-8", tchar,
+ false,
+ ,
+ in_nbytes * 2,
+ WIMLIB_ERR_INVALID_UTF16_STRING,
+ ERROR_WITH_ERRNO("Failed to convert UTF-16LE string "
+ "to UTF-8 string!"),
+ static)
-int iconv_global_init()
+DEFINE_CHAR_CONVERSION_FUNCTIONS(tstr, "", tchar,
+ utf16le, "UTF-16LE", utf16lechar,
+ true,
+ return utf8_to_utf16le(in, in_nbytes, out_ret, out_nbytes_ret),
+ in_nbytes * 2,
+ WIMLIB_ERR_INVALID_MULTIBYTE_STRING,
+ ERROR_WITH_ERRNO("Failed to convert multibyte "
+ "string \"%"TS"\" to UTF-16LE string!", in);
+ ERROR("If the data you provided was UTF-8, please make sure "
+ "the character encoding\n"
+ " of your current locale is UTF-8."),
+ )
+
+DEFINE_CHAR_CONVERSION_FUNCTIONS(utf16le, "UTF-16LE", utf16lechar,
+ tstr, "", tchar,
+ true,
+ return utf16le_to_utf8(in, in_nbytes, out_ret, out_nbytes_ret),
+ in_nbytes * 2,
+ WIMLIB_ERR_UNICODE_STRING_NOT_REPRESENTABLE,
+ ERROR("Failed to convert UTF-16LE string to "
+ "multibyte string!");
+ ERROR("This may be because the UTF-16LE string "
+ "could not be represented\n"
+ " in your locale's character encoding."),
+ )
+#endif
+
+/* tchar to UTF-8 and back */
+#if TCHAR_IS_UTF16LE
+
+/* Windows */
+DEFINE_CHAR_CONVERSION_FUNCTIONS(tstr, "UTF-16LE", tchar,
+ utf8, "UTF-8", char,
+ false,
+ ,
+ in_nbytes * 2,
+ WIMLIB_ERR_INVALID_UTF16_STRING,
+ ERROR_WITH_ERRNO("Failed to convert UTF-16LE "
+ "string \"%"TS"\" to UTF-8 string!", in),
+ )
+
+DEFINE_CHAR_CONVERSION_FUNCTIONS(utf8, "UTF-8", char,
+ tstr, "UTF-16LE", tchar,
+ false,
+ ,
+ in_nbytes * 2,
+ WIMLIB_ERR_INVALID_UTF8_STRING,
+ ERROR_WITH_ERRNO("Failed to convert UTF-8 string "
+ "to UTF-16LE string!"),
+ )
+#else
+
+/* UNIX */
+
+DEFINE_CHAR_CONVERSION_FUNCTIONS(tstr, "", tchar,
+ utf8, "UTF-8", char,
+ true,
+ ,
+ in_nbytes * 4,
+ WIMLIB_ERR_INVALID_MULTIBYTE_STRING,
+ ERROR_WITH_ERRNO("Failed to convert multibyte "
+ "string \"%"TS"\" to UTF-8 string!", in);
+ ERROR("If the data you provided was UTF-8, please make sure "
+ "the character\n"
+ " encoding of your current locale is UTF-8."),
+ )
+
+DEFINE_CHAR_CONVERSION_FUNCTIONS(utf8, "UTF-8", char,
+ tstr, "", tchar,
+ true,
+ ,
+ in_nbytes * 4,
+ WIMLIB_ERR_UNICODE_STRING_NOT_REPRESENTABLE,
+ ERROR("Failed to convert UTF-8 string to "
+ "multibyte string!");
+ ERROR("This may be because the UTF-8 data "
+ "could not be represented\n"
+ " in your locale's character encoding."),
+ )
+#endif
+
+int
+tstr_to_utf8_simple(const tchar *tstr, char **out)
{
- if (cd_utf16_to_utf8 == (iconv_t)(-1)) {
- cd_utf16_to_utf8 = iconv_open("UTF-8", "UTF-16LE");
- if (cd_utf16_to_utf8 == (iconv_t)-1) {
- ERROR_WITH_ERRNO("Failed to get conversion descriptor "
- "for converting UTF-16LE to UTF-8");
- if (errno == ENOMEM)
- return WIMLIB_ERR_NOMEM;
- else
- return WIMLIB_ERR_ICONV_NOT_AVAILABLE;
- }
- }
+ size_t out_nbytes;
+ return tstr_to_utf8(tstr, tstrlen(tstr) * sizeof(tchar),
+ out, &out_nbytes);
+}
- if (cd_utf8_to_utf16 == (iconv_t)(-1)) {
- cd_utf8_to_utf16 = iconv_open("UTF-16LE", "UTF-8");
- if (cd_utf8_to_utf16 == (iconv_t)-1) {
- ERROR_WITH_ERRNO("Failed to get conversion descriptor "
- "for converting UTF-8 to UTF-16LE");
- if (errno == ENOMEM)
- return WIMLIB_ERR_NOMEM;
- else
- return WIMLIB_ERR_ICONV_NOT_AVAILABLE;
- }
+int
+utf8_to_tstr_simple(const char *utf8str, tchar **out)
+{
+ size_t out_nbytes;
+ return utf8_to_tstr(utf8str, strlen(utf8str), out, &out_nbytes);
+}
+
+static void
+iconv_init(struct iconv_list_head *head)
+{
+ pthread_mutex_init(&head->mutex, NULL);
+ INIT_LIST_HEAD(&head->list);
+}
+
+static void
+iconv_cleanup(struct iconv_list_head *head)
+{
+ pthread_mutex_destroy(&head->mutex);
+ while (!list_empty(&head->list)) {
+ struct iconv_node *i;
+
+ i = container_of(head->list.next, struct iconv_node, list);
+ list_del(&i->list);
+ iconv_close(i->cd);
+ FREE(i);
}
- return 0;
}
-void iconv_global_cleanup()
+void
+iconv_global_init(void)
{
- if (cd_utf8_to_utf16 != (iconv_t)(-1))
- iconv_close(cd_utf8_to_utf16);
- if (cd_utf16_to_utf8 != (iconv_t)(-1))
- iconv_close(cd_utf16_to_utf8);
+ iconv_init(&iconv_utf8_to_tstr);
+ iconv_init(&iconv_tstr_to_utf8);
+#if !TCHAR_IS_UTF16LE
+ iconv_init(&iconv_utf16le_to_tstr);
+ iconv_init(&iconv_tstr_to_utf16le);
+ iconv_init(&iconv_utf16le_to_utf8);
+ iconv_init(&iconv_utf8_to_utf16le);
+#endif
}
+
+void
+iconv_global_cleanup(void)
+{
+ iconv_cleanup(&iconv_utf8_to_tstr);
+ iconv_cleanup(&iconv_tstr_to_utf8);
+#if !TCHAR_IS_UTF16LE
+ iconv_cleanup(&iconv_utf16le_to_tstr);
+ iconv_cleanup(&iconv_tstr_to_utf16le);
+ iconv_cleanup(&iconv_utf16le_to_utf8);
+ iconv_cleanup(&iconv_utf8_to_utf16le);
#endif
+}
-/* Converts a string in the UTF-16LE encoding to a newly allocated string in the
- * UTF-8 encoding.
- *
- * If available, do so by calling a similar function from libntfs-3g.
- * Otherwise, use iconv() along with the helper function utf16_to_utf8_size().
+/* A table that maps from UCS-2 characters to their upper case equivalents.
+ * Index and array values are both CPU endian.
+ * Note: this is only an *approximation* of real UTF-16 case folding.
*/
-int utf16_to_utf8(const char *utf16_str, size_t utf16_nbytes,
- char **utf8_str_ret, size_t *utf8_nbytes_ret)
+static u16 upcase[65536];
+
+void
+init_upcase(void)
{
- int ret;
+ /* This is the table used in NTFS volumes formatted by Windows 10.
+ * It was compressed by tools/compress_upcase_table.c. */
+ static const u16 upcase_compressed[] = {
+ 0x0000, 0x0000, 0x0060, 0x0000, 0x0000, 0xffe0, 0x0019, 0x0061,
+ 0x0061, 0x0000, 0x001b, 0x005d, 0x0008, 0x0060, 0x0000, 0x0079,
+ 0x0000, 0x0000, 0x0000, 0xffff, 0x002f, 0x0100, 0x0002, 0x0000,
+ 0x0007, 0x012b, 0x0011, 0x0121, 0x002f, 0x0103, 0x0006, 0x0101,
+ 0x0000, 0x00c3, 0x0006, 0x0131, 0x0007, 0x012e, 0x0004, 0x0000,
+ 0x0003, 0x012f, 0x0000, 0x0061, 0x0004, 0x0130, 0x0000, 0x00a3,
+ 0x0003, 0x0000, 0x0000, 0x0082, 0x000b, 0x0131, 0x0006, 0x0189,
+ 0x0008, 0x012f, 0x0007, 0x012e, 0x0000, 0x0038, 0x0006, 0x0000,
+ 0x0000, 0xfffe, 0x0007, 0x01c4, 0x000f, 0x0101, 0x0000, 0xffb1,
+ 0x0015, 0x011e, 0x0004, 0x01cc, 0x002a, 0x0149, 0x0014, 0x0149,
+ 0x0007, 0x0000, 0x0009, 0x018c, 0x000b, 0x0138, 0x0000, 0x2a1f,
+ 0x0000, 0x2a1c, 0x0000, 0x0000, 0x0000, 0xff2e, 0x0000, 0xff32,
+ 0x0000, 0x0000, 0x0000, 0xff33, 0x0000, 0xff33, 0x0000, 0x0000,
+ 0x0000, 0xff36, 0x0000, 0x0000, 0x0000, 0xff35, 0x0004, 0x0000,
+ 0x0002, 0x0257, 0x0000, 0x0000, 0x0000, 0xff31, 0x0004, 0x0000,
+ 0x0000, 0xff2f, 0x0000, 0xff2d, 0x0000, 0x0000, 0x0000, 0x29f7,
+ 0x0003, 0x0000, 0x0002, 0x0269, 0x0000, 0x29fd, 0x0000, 0xff2b,
+ 0x0002, 0x0000, 0x0000, 0xff2a, 0x0007, 0x0000, 0x0000, 0x29e7,
+ 0x0002, 0x0000, 0x0000, 0xff26, 0x0005, 0x027e, 0x0003, 0x027e,
+ 0x0000, 0xffbb, 0x0000, 0xff27, 0x0000, 0xff27, 0x0000, 0xffb9,
+ 0x0005, 0x0000, 0x0000, 0xff25, 0x0065, 0x007b, 0x0079, 0x0293,
+ 0x0008, 0x012d, 0x0003, 0x019c, 0x0002, 0x037b, 0x002e, 0x0000,
+ 0x0000, 0xffda, 0x0000, 0xffdb, 0x0002, 0x03ad, 0x0012, 0x0060,
+ 0x000a, 0x0060, 0x0000, 0xffc0, 0x0000, 0xffc1, 0x0000, 0xffc1,
+ 0x0008, 0x0000, 0x0000, 0xfff8, 0x001a, 0x0118, 0x0000, 0x0007,
+ 0x0008, 0x018d, 0x0009, 0x0233, 0x0046, 0x0035, 0x0006, 0x0061,
+ 0x0000, 0xffb0, 0x000f, 0x0450, 0x0025, 0x010e, 0x000a, 0x036b,
+ 0x0032, 0x048b, 0x000e, 0x0100, 0x0000, 0xfff1, 0x0037, 0x048a,
+ 0x0026, 0x0465, 0x0034, 0x0000, 0x0000, 0xffd0, 0x0025, 0x0561,
+ 0x00de, 0x0293, 0x1714, 0x0587, 0x0000, 0x8a04, 0x0003, 0x0000,
+ 0x0000, 0x0ee6, 0x0087, 0x02ee, 0x0092, 0x1e01, 0x0069, 0x1df7,
+ 0x0000, 0x0008, 0x0007, 0x1f00, 0x0008, 0x0000, 0x000e, 0x1f02,
+ 0x0008, 0x1f0e, 0x0010, 0x1f06, 0x001a, 0x1f06, 0x0002, 0x1f0f,
+ 0x0007, 0x1f50, 0x0017, 0x1f19, 0x0000, 0x004a, 0x0000, 0x004a,
+ 0x0000, 0x0056, 0x0003, 0x1f72, 0x0000, 0x0064, 0x0000, 0x0064,
+ 0x0000, 0x0080, 0x0000, 0x0080, 0x0000, 0x0070, 0x0000, 0x0070,
+ 0x0000, 0x007e, 0x0000, 0x007e, 0x0028, 0x1f1e, 0x000c, 0x1f06,
+ 0x0000, 0x0000, 0x0000, 0x0009, 0x000f, 0x0000, 0x000d, 0x1fb3,
+ 0x000d, 0x1f44, 0x0008, 0x1fcd, 0x0006, 0x03f2, 0x0015, 0x1fbb,
+ 0x014e, 0x0587, 0x0000, 0xffe4, 0x0021, 0x0000, 0x0000, 0xfff0,
+ 0x000f, 0x2170, 0x000a, 0x0238, 0x0346, 0x0587, 0x0000, 0xffe6,
+ 0x0019, 0x24d0, 0x0746, 0x0587, 0x0026, 0x0561, 0x000b, 0x057e,
+ 0x0004, 0x012f, 0x0000, 0xd5d5, 0x0000, 0xd5d8, 0x000c, 0x022e,
+ 0x000e, 0x03f8, 0x006e, 0x1e33, 0x0011, 0x0000, 0x0000, 0xe3a0,
+ 0x0025, 0x2d00, 0x17f2, 0x0587, 0x6129, 0x2d26, 0x002e, 0x0201,
+ 0x002a, 0x1def, 0x0098, 0xa5b7, 0x0040, 0x1dff, 0x000e, 0x0368,
+ 0x000d, 0x022b, 0x034c, 0x2184, 0x5469, 0x2d26, 0x007f, 0x0061,
+ 0x0040, 0x0000,
+ };
- if (utf16_nbytes == 0) {
- *utf8_str_ret = NULL;
- *utf8_nbytes_ret = 0;
- return 0;
+ /* Simple LZ decoder */
+ const u16 *in_next = upcase_compressed;
+ for (u32 i = 0; i < ARRAY_LEN(upcase); ) {
+ u16 length = *in_next++;
+ u16 src_pos = *in_next++;
+ if (length == 0) {
+ /* Literal */
+ upcase[i++] = src_pos;
+ } else {
+ /* Match */
+ do {
+ upcase[i++] = upcase[src_pos++];
+ } while (--length);
+ }
}
- if (utf16_nbytes & 1) {
- ERROR("UTF-16LE string is invalid (odd number of bytes)!");
- return WIMLIB_ERR_INVALID_UTF16_STRING;
- }
-#ifdef WITH_NTFS_3G
- char *outs = NULL;
- int outs_len = ntfs_ucstombs((const ntfschar*)utf16_str,
- utf16_nbytes / 2, &outs, 0);
- if (outs_len >= 0) {
- *utf8_str_ret = outs;
- *utf8_nbytes_ret = outs_len;
- ret = 0;
- } else {
- if (errno == ENOMEM)
- ret = WIMLIB_ERR_NOMEM;
- else
- ret = WIMLIB_ERR_INVALID_UTF16_STRING;
- }
-#else /* !WITH_NTFS_3G */
-
- ret = iconv_global_init();
- if (ret != 0)
- return ret;
-
- ret = utf16_to_utf8_size((const u16*)utf16_str, utf16_nbytes / 2);
- if (ret >= 0) {
- size_t utf8_expected_nbytes;
- char *utf8_str;
- size_t utf8_bytes_left;
- size_t utf16_bytes_left;
- size_t num_chars_converted;
- char *utf8_str_save;
- const char *utf16_str_save;
-
- utf8_expected_nbytes = ret;
- utf8_str = MALLOC(utf8_expected_nbytes + 1);
- if (utf8_str) {
- utf8_bytes_left = utf8_expected_nbytes;
- utf16_bytes_left = utf16_nbytes;
- utf8_str_save = utf8_str;
- utf16_str_save = utf16_str;
- num_chars_converted = iconv(cd_utf16_to_utf8,
- (char**)&utf16_str,
- &utf16_bytes_left,
- &utf8_str,
- &utf8_bytes_left);
- utf8_str = utf8_str_save;
- utf16_str = utf16_str_save;
- if (utf16_bytes_left == 0 &&
- utf8_bytes_left == 0 &&
- num_chars_converted != (size_t)(-1))
- {
- utf8_str[utf8_expected_nbytes] = '\0';
- *utf8_str_ret = utf8_str;
- *utf8_nbytes_ret = utf8_expected_nbytes;
- ret = 0;
- } else {
- FREE(utf8_str);
- ret = WIMLIB_ERR_INVALID_UTF16_STRING;
- }
- } else
- ret = WIMLIB_ERR_NOMEM;
- } else
- ret = WIMLIB_ERR_INVALID_UTF16_STRING;
-#endif /* WITH_NTFS_3G */
-
-#ifdef ENABLE_ERROR_MESSAGES
- if (ret != 0) {
- ERROR_WITH_ERRNO("Error converting UTF-16LE string to UTF-8");
- ERROR("The failing string was:");
- print_string(utf16_str, utf16_nbytes);
- putchar('\n');
- }
-#endif /* ENABLE_ERROR_MESSAGES */
- return ret;
-}
+ /* Delta filter */
+ for (u32 i = 0; i < ARRAY_LEN(upcase); i++)
+ upcase[i] += i;
+#if 0
+ /* Sanity checks */
+ wimlib_assert(upcase['a'] == 'A');
+ wimlib_assert(upcase['A'] == 'A');
+ wimlib_assert(upcase['z'] == 'Z');
+ wimlib_assert(upcase['Z'] == 'Z');
+ wimlib_assert(upcase['1'] == '1');
+ wimlib_assert(upcase[0x00e9] == 0x00c9); /* Latin letter e, with acute accent */
+ wimlib_assert(upcase[0x00c9] == 0x00c9);
+ wimlib_assert(upcase[0x03c1] == 0x03a1); /* Greek letter rho */
+ wimlib_assert(upcase[0x03a1] == 0x03a1);
+ wimlib_assert(upcase[0x0436] == 0x0416); /* Cyrillic letter zhe */
+ wimlib_assert(upcase[0x0416] == 0x0416);
+ wimlib_assert(upcase[0x0567] == 0x0537); /* Armenian letter eh */
+ wimlib_assert(upcase[0x0537] == 0x0537);
+ wimlib_assert(upcase[0x24d0] == 0x24b6); /* Circled Latin letter A
+ (is that a real character???) */
+ wimlib_assert(upcase[0x24b6] == 0x24b6);
+ wimlib_assert(upcase[0x2603] == 0x2603); /* Note to self: Upper case
+ snowman symbol does not
+ exist. */
+#endif
+}
-/* Converts a string in the UTF-8 encoding to a newly allocated string in the
- * UTF-16 encoding.
+/* Compare UTF-16LE strings case-sensitively (%ignore_case == false) or
+ * case-insensitively (%ignore_case == true).
*
- * If available, do so by calling a similar function from libntfs-3g.
- * Otherwise, use iconv() along with the helper function utf8_to_utf16_size().
- */
-int utf8_to_utf16(const char *utf8_str, size_t utf8_nbytes,
- char **utf16_str_ret, size_t *utf16_nbytes_ret)
+ * This is implemented using the default upper-case table used by NTFS. It does
+ * not handle all possible cases allowed by UTF-16LE. For example, different
+ * normalizations of the same sequence of "characters" are not considered equal.
+ * It hopefully does the right thing most of the time though. */
+int
+cmp_utf16le_strings(const utf16lechar *s1, size_t n1,
+ const utf16lechar *s2, size_t n2,
+ bool ignore_case)
{
- int ret;
- if (utf8_nbytes == 0) {
- *utf16_str_ret = NULL;
- *utf16_nbytes_ret = 0;
- return 0;
+ size_t n = min(n1, n2);
+
+ if (ignore_case) {
+ for (size_t i = 0; i < n; i++) {
+ u16 c1 = upcase[le16_to_cpu(s1[i])];
+ u16 c2 = upcase[le16_to_cpu(s2[i])];
+ if (c1 != c2)
+ return (c1 < c2) ? -1 : 1;
+ }
+ } else {
+ for (size_t i = 0; i < n; i++) {
+ u16 c1 = le16_to_cpu(s1[i]);
+ u16 c2 = le16_to_cpu(s2[i]);
+ if (c1 != c2)
+ return (c1 < c2) ? -1 : 1;
+ }
}
-#ifdef WITH_NTFS_3G
- char *outs = NULL;
- int outs_nchars = ntfs_mbstoucs(utf8_str, (ntfschar**)&outs);
- if (outs_nchars >= 0) {
- *utf16_str_ret = outs;
- *utf16_nbytes_ret = (size_t)outs_nchars * 2;
- ret = 0;
+ if (n1 == n2)
+ return 0;
+ return (n1 < n2) ? -1 : 1;
+}
+
+/* Like cmp_utf16le_strings(), but assumes the strings are null terminated. */
+int
+cmp_utf16le_strings_z(const utf16lechar *s1, const utf16lechar *s2,
+ bool ignore_case)
+{
+ if (ignore_case) {
+ for (;;) {
+ u16 c1 = upcase[le16_to_cpu(*s1)];
+ u16 c2 = upcase[le16_to_cpu(*s2)];
+ if (c1 != c2)
+ return (c1 < c2) ? -1 : 1;
+ if (c1 == 0)
+ return 0;
+ s1++, s2++;
+ }
} else {
- if (errno == ENOMEM)
- ret = WIMLIB_ERR_NOMEM;
- else
- ret = WIMLIB_ERR_INVALID_UTF8_STRING;
+ while (*s1 && *s1 == *s2)
+ s1++, s2++;
+ if (*s1 == *s2)
+ return 0;
+ return (le16_to_cpu(*s1) < le16_to_cpu(*s2)) ? -1 : 1;
}
-#else /* !WITH_NTFS_3G */
-
- ret = iconv_global_init();
- if (ret != 0)
- return ret;
- ret = utf8_to_utf16_size(utf8_str);
- if (ret >= 0) {
- size_t utf16_expected_nbytes;
- char *utf16_str;
- size_t utf16_bytes_left;
- size_t utf8_bytes_left;
- size_t num_chars_converted;
- const char *utf8_str_save;
- char *utf16_str_save;
-
- utf16_expected_nbytes = (size_t)ret * 2;
- utf16_str = MALLOC(utf16_expected_nbytes + 2);
- if (utf16_str) {
- utf16_bytes_left = utf16_expected_nbytes;
- utf8_bytes_left = utf8_nbytes;
- utf8_str_save = utf8_str;
- utf16_str_save = utf16_str;
- num_chars_converted = iconv(cd_utf8_to_utf16,
- (char**)&utf8_str,
- &utf8_bytes_left,
- &utf16_str,
- &utf16_bytes_left);
- utf8_str = utf8_str_save;
- utf16_str = utf16_str_save;
- if (utf16_bytes_left == 0 &&
- utf8_bytes_left == 0 &&
- num_chars_converted != (size_t)(-1))
- {
- utf16_str[utf16_expected_nbytes] = '\0';
- utf16_str[utf16_expected_nbytes + 1] = '\0';
- *utf16_str_ret = utf16_str;
- *utf16_nbytes_ret = utf16_expected_nbytes;
- ret = 0;
- } else {
- FREE(utf16_str);
- ret = WIMLIB_ERR_INVALID_UTF8_STRING;
- }
- } else
- ret = WIMLIB_ERR_NOMEM;
- } else
- ret = WIMLIB_ERR_INVALID_UTF8_STRING;
-#endif /* WITH_NTFS_3G */
-
-#ifdef ENABLE_ERROR_MESSAGES
- if (ret != 0) {
- ERROR_WITH_ERRNO("Error converting UTF-8 string to UTF-16LE");
- ERROR("The failing string was:");
- print_string(utf8_str, utf8_nbytes);
- putchar('\n');
- ERROR("Length: %zu bytes", utf8_nbytes);
+}
+
+/* Duplicate a UTF-16LE string. The input string might not be null terminated
+ * and might be misaligned, but the returned string is guaranteed to be null
+ * terminated and properly aligned. */
+utf16lechar *
+utf16le_dupz(const void *ustr, size_t usize)
+{
+ utf16lechar *dup = MALLOC(usize + sizeof(utf16lechar));
+ if (dup) {
+ memcpy(dup, ustr, usize);
+ dup[usize / sizeof(utf16lechar)] = 0;
}
-#endif /* ENABLE_ERROR_MESSAGES */
- return ret;
+ return dup;
+}
+
+/* Duplicate a null-terminated UTF-16LE string. */
+utf16lechar *
+utf16le_dup(const utf16lechar *ustr)
+{
+ const utf16lechar *p = ustr;
+ while (*p++)
+ ;
+ return memdup(ustr, (const u8 *)p - (const u8 *)ustr);
+}
+
+/* Return the length, in bytes, of a UTF-null terminated UTF-16 string,
+ * excluding the null terminator. */
+size_t
+utf16le_len_bytes(const utf16lechar *s)
+{
+ const utf16lechar *p = s;
+ while (*p)
+ p++;
+ return (p - s) * sizeof(utf16lechar);
+}
+
+/* Return the length, in UTF-16 coding units, of a UTF-null terminated UTF-16
+ * string, excluding the null terminator. */
+size_t
+utf16le_len_chars(const utf16lechar *s)
+{
+ return utf16le_len_bytes(s) / sizeof(utf16lechar);
}
git://wimlib.net / wimlib / blobdiff