/*
- * encoding.c: Convert UTF-8 to UTF-16LE strings and vice versa
+ * encoding.c
*/
/*
- * Copyright (C) 2012, 2013 Biggers
+ * Copyright (C) 2012, 2013 Eric Biggers
*
* This file is part of wimlib, a library for working with WIM files.
*
* along with wimlib; if not, see http://www.gnu.org/licenses/.
*/
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
#include "wimlib.h"
-#include "util.h"
-#include "endianness.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"
#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 <stdlib.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)
+#ifdef HAVE_ALLOCA_H
+# include <alloca.h>
#endif
- count += 3;
- else
- goto fail;
- }
- if (surrog)
- goto fail;
- ret = count;
-out:
- return ret;
-fail:
- errno = EILSEQ;
- goto out;
+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, \
+ .list = LIST_HEAD_INIT(name.list), \
+ .mutex = PTHREAD_MUTEX_INITIALIZER, \
}
-/*
- * 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;
+}
+
+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;
+}
+
+/* Prevent printing an error message if a character conversion error occurs
+ * while printing an error message. (This variable is not per-thread but it
+ * doesn't matter too much since it's just the error messages.) */
+static bool error_message_being_printed = false;
+
+#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) { \
+ if (!error_message_being_printed) { \
+ error_message_being_printed = true; \
+ err_msg; \
+ error_message_being_printed = false; \
+ } \
+ 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) { \
+ if (!error_message_being_printed) { \
+ error_message_being_printed = true; \
+ err_msg; \
+ error_message_being_printed = false; \
+ } \
+ 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; \
}
-#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);
+#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)
+
+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."),
+ )
-int iconv_global_init()
+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;
- }
- }
- return 0;
+int
+utf8_to_tstr_simple(const char *utf8str, tchar **out)
+{
+ size_t out_nbytes;
+ return utf8_to_tstr(utf8str, strlen(utf8str), out, &out_nbytes);
}
-void iconv_global_cleanup()
+static void
+iconv_cleanup(struct iconv_list_head *head)
{
- 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);
+ 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);
+ }
}
+
+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.
+/* 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.
+ */
+static u16 upcase[65536];
+
+/*
+ * Initialize the 'upcase' table.
*
- * If available, do so by calling a similar function from libntfs-3g.
- * Otherwise, use iconv() along with the helper function utf16_to_utf8_size().
+ * Code modified from NTFS-3g, original copyright notices below:
+ *
+ * Copyright (c) 2000-2004 Anton Altaparmakov
+ * Copyright (c) 2002-2009 Szabolcs Szakacsits
+ * Copyright (c) 2008-2011 Jean-Pierre Andre
+ * Copyright (c) 2008 Bernhard Kaindl
+ *
+ * License GPLv2 or later.
+ *
+ * The expanded table itself is the same as that used by Windows Vista for
+ * NTFS case insensitivity.
*/
-int utf16_to_utf8(const char *utf16_str, size_t utf16_nbytes,
- char **utf8_str_ret, size_t *utf8_nbytes_ret)
+void
+init_upcase(void)
{
- int ret;
+ /*
+ * This is the table as defined by Vista
+ */
+ /*
+ * "Start" is inclusive and "End" is exclusive, every value has the
+ * value of "Add" added to it.
+ */
+ static const u16 uc_run_table[][3] = { /* Start, End, Add */
+ {0x0061, 0x007b, -32}, {0x00e0, 0x00f7, -32}, {0x00f8, 0x00ff, -32},
+ {0x0256, 0x0258, -205}, {0x028a, 0x028c, -217}, {0x037b, 0x037e, 130},
+ {0x03ac, 0x03ad, -38}, {0x03ad, 0x03b0, -37}, {0x03b1, 0x03c2, -32},
+ {0x03c2, 0x03c3, -31}, {0x03c3, 0x03cc, -32}, {0x03cc, 0x03cd, -64},
+ {0x03cd, 0x03cf, -63}, {0x0430, 0x0450, -32}, {0x0450, 0x0460, -80},
+ {0x0561, 0x0587, -48}, {0x1f00, 0x1f08, 8}, {0x1f10, 0x1f16, 8},
+ {0x1f20, 0x1f28, 8}, {0x1f30, 0x1f38, 8}, {0x1f40, 0x1f46, 8},
+ {0x1f51, 0x1f52, 8}, {0x1f53, 0x1f54, 8}, {0x1f55, 0x1f56, 8},
+ {0x1f57, 0x1f58, 8}, {0x1f60, 0x1f68, 8}, {0x1f70, 0x1f72, 74},
+ {0x1f72, 0x1f76, 86}, {0x1f76, 0x1f78, 100}, {0x1f78, 0x1f7a, 128},
+ {0x1f7a, 0x1f7c, 112}, {0x1f7c, 0x1f7e, 126}, {0x1f80, 0x1f88, 8},
+ {0x1f90, 0x1f98, 8}, {0x1fa0, 0x1fa8, 8}, {0x1fb0, 0x1fb2, 8},
+ {0x1fb3, 0x1fb4, 9}, {0x1fcc, 0x1fcd, -9}, {0x1fd0, 0x1fd2, 8},
+ {0x1fe0, 0x1fe2, 8}, {0x1fe5, 0x1fe6, 7}, {0x1ffc, 0x1ffd, -9},
+ {0x2170, 0x2180, -16}, {0x24d0, 0x24ea, -26}, {0x2c30, 0x2c5f, -48},
+ {0x2d00, 0x2d26, -7264}, {0xff41, 0xff5b, -32},
+ };
+ /*
+ * "Start" is exclusive and "End" is inclusive, every second value is
+ * decremented by one.
+ */
+ static const u16 uc_dup_table[][2] = { /* Start, End */
+ {0x0100, 0x012f}, {0x0132, 0x0137}, {0x0139, 0x0149}, {0x014a, 0x0178},
+ {0x0179, 0x017e}, {0x01a0, 0x01a6}, {0x01b3, 0x01b7}, {0x01cd, 0x01dd},
+ {0x01de, 0x01ef}, {0x01f4, 0x01f5}, {0x01f8, 0x01f9}, {0x01fa, 0x0220},
+ {0x0222, 0x0234}, {0x023b, 0x023c}, {0x0241, 0x0242}, {0x0246, 0x024f},
+ {0x03d8, 0x03ef}, {0x03f7, 0x03f8}, {0x03fa, 0x03fb}, {0x0460, 0x0481},
+ {0x048a, 0x04bf}, {0x04c1, 0x04c4}, {0x04c5, 0x04c8}, {0x04c9, 0x04ce},
+ {0x04ec, 0x04ed}, {0x04d0, 0x04eb}, {0x04ee, 0x04f5}, {0x04f6, 0x0513},
+ {0x1e00, 0x1e95}, {0x1ea0, 0x1ef9}, {0x2183, 0x2184}, {0x2c60, 0x2c61},
+ {0x2c67, 0x2c6c}, {0x2c75, 0x2c76}, {0x2c80, 0x2ce3},
+ };
+ /*
+ * Set the Unicode character at offset "Offset" to "Value". Note,
+ * "Value" is host endian.
+ */
+ static const u16 uc_byte_table[][2] = { /* Offset, Value */
+ {0x00ff, 0x0178}, {0x0180, 0x0243}, {0x0183, 0x0182}, {0x0185, 0x0184},
+ {0x0188, 0x0187}, {0x018c, 0x018b}, {0x0192, 0x0191}, {0x0195, 0x01f6},
+ {0x0199, 0x0198}, {0x019a, 0x023d}, {0x019e, 0x0220}, {0x01a8, 0x01a7},
+ {0x01ad, 0x01ac}, {0x01b0, 0x01af}, {0x01b9, 0x01b8}, {0x01bd, 0x01bc},
+ {0x01bf, 0x01f7}, {0x01c6, 0x01c4}, {0x01c9, 0x01c7}, {0x01cc, 0x01ca},
+ {0x01dd, 0x018e}, {0x01f3, 0x01f1}, {0x023a, 0x2c65}, {0x023e, 0x2c66},
+ {0x0253, 0x0181}, {0x0254, 0x0186}, {0x0259, 0x018f}, {0x025b, 0x0190},
+ {0x0260, 0x0193}, {0x0263, 0x0194}, {0x0268, 0x0197}, {0x0269, 0x0196},
+ {0x026b, 0x2c62}, {0x026f, 0x019c}, {0x0272, 0x019d}, {0x0275, 0x019f},
+ {0x027d, 0x2c64}, {0x0280, 0x01a6}, {0x0283, 0x01a9}, {0x0288, 0x01ae},
+ {0x0289, 0x0244}, {0x028c, 0x0245}, {0x0292, 0x01b7}, {0x03f2, 0x03f9},
+ {0x04cf, 0x04c0}, {0x1d7d, 0x2c63}, {0x214e, 0x2132},
+ };
- if (utf16_nbytes == 0) {
- *utf8_str_ret = NULL;
- *utf8_nbytes_ret = 0;
- return 0;
- }
+ for (u32 i = 0; i < 65536; i++)
+ upcase[i] = i;
- 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;
+ for (u32 r = 0; r < ARRAY_LEN(uc_run_table); r++)
+ for (u32 i = uc_run_table[r][0]; i < uc_run_table[r][1]; i++)
+ upcase[i] = i + uc_run_table[r][2];
+
+ for (u32 r = 0; r < ARRAY_LEN(uc_dup_table); r++)
+ for (u32 i = uc_dup_table[r][0]; i < uc_dup_table[r][1]; i += 2)
+ upcase[i + 1] = i;
+
+ for (u32 r = 0; r < ARRAY_LEN(uc_byte_table); r++)
+ upcase[uc_byte_table[r][0]] = uc_byte_table[r][1];
+
+#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
+}
+
+/* Compare UTF-16LE strings case-sensitively (%ignore_case == false) or
+ * case-insensitively (%ignore_case == true).
+ *
+ * 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)
+{
+ 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 {
- 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');
+ 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;
+ }
}
-#endif /* ENABLE_ERROR_MESSAGES */
- return ret;
+ if (n1 == n2)
+ return 0;
+ return (n1 < n2) ? -1 : 1;
}
-
-/* Converts a string in the UTF-8 encoding to a newly allocated string in the
- * UTF-16 encoding.
- *
- * 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)
+/* Duplicates a string of system-dependent encoding into a UTF-16LE string and
+ * returns the string and its length, in bytes, in the pointer arguments. Frees
+ * any existing string at the return location before overwriting it. */
+int
+get_utf16le_string(const tchar *name, utf16lechar **name_utf16le_ret,
+ u16 *name_utf16le_nbytes_ret)
{
+ utf16lechar *name_utf16le;
+ size_t name_utf16le_nbytes;
int ret;
- if (utf8_nbytes == 0) {
- *utf16_str_ret = NULL;
- *utf16_nbytes_ret = 0;
- return 0;
- }
-#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;
- } else {
- if (errno == ENOMEM)
- ret = WIMLIB_ERR_NOMEM;
- else
+#if TCHAR_IS_UTF16LE
+ name_utf16le_nbytes = tstrlen(name) * sizeof(utf16lechar);
+ name_utf16le = MALLOC(name_utf16le_nbytes + sizeof(utf16lechar));
+ if (name_utf16le == NULL)
+ return WIMLIB_ERR_NOMEM;
+ memcpy(name_utf16le, name, name_utf16le_nbytes + sizeof(utf16lechar));
+ ret = 0;
+#else
+
+ ret = tstr_to_utf16le(name, tstrlen(name), &name_utf16le,
+ &name_utf16le_nbytes);
+ if (ret == 0) {
+ if (name_utf16le_nbytes > 0xffff) {
+ FREE(name_utf16le);
+ ERROR("Multibyte string \"%"TS"\" is too long!", name);
ret = WIMLIB_ERR_INVALID_UTF8_STRING;
+ }
}
-#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);
+#endif
+ if (ret == 0) {
+ FREE(*name_utf16le_ret);
+ *name_utf16le_ret = name_utf16le;
+ *name_utf16le_nbytes_ret = name_utf16le_nbytes;
}
-#endif /* ENABLE_ERROR_MESSAGES */
return ret;
}
+
git://wimlib.net / wimlib / blobdiff