/*
- * encoding.c: Convert "multibyte" strings (the locale-default encoding---
- * generally, UTF-8 or something like ISO-8859-1) to UTF-16LE strings, and vice
- * versa. Also, convert UTF-8 strings to multibyte strings.
+ * encoding.c - UTF-8 and UTF-16LE codecs and utility functions
+ *
+ * Copyright (C) 2012-2016 Eric Biggers
+ *
+ * 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.
+ *
+ * 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 Lesser General Public License
+ * along with this file; if not, see http://www.gnu.org/licenses/.
*/
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <errno.h>
+#include <string.h>
+
+#include "wimlib/encoding.h"
+#include "wimlib/endianness.h"
+#include "wimlib/error.h"
+#include "wimlib/unaligned.h"
+#include "wimlib/util.h"
+
/*
- * Copyright (C) 2012, 2013 Eric Biggers
+ * Allow unpaired surrogates, such as might exist in Windows-style filenames ---
+ * which are normally valid UTF-16LE, but are actually treated as opaque
+ * sequences of 16-bit WCHARs by Windows. When decoding "UTF-16LE", unpaired
+ * surrogates will be decoded as their surrogate codepoints; and when encoding
+ * to and from "UTF-8", the encoding will actually be WTF-8 ("Wobbly
+ * Transformation Format - 8-bit"), a superset of UTF-8 which permits the
+ * surrogate codepoints.
*
- * This file is part of wimlib, a library for working with WIM files.
+ * In combination with also allowing the "non-character" codepoints U+FFFE and
+ * U+FFFF, the result is that every Windows-style filename can be translated to
+ * a UNIX-style filename.
*
- * 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.
+ * Unfortunately, the converse is not true: not every UNIX filename can be
+ * translated to a Windows filename. Only UNIX filenames that are valid "WTF-8"
+ * can be translated. I considered ways to define a bijective mapping, but
+ * there did not seem to be a straightforward way. The "UTF-8b" scheme, for
+ * example, would map each invalid byte 'b' to a surrogate "escape code" 'U+DC00
+ * + b'. The problem with this was that surrogate escape codes can be combined
+ * to create a valid UTF-8 sequence, thus breaking the bijection by mapping
+ * multiple Windows filenames to a single UNIX filename.
+ */
+#define ALLOW_UNPAIRED_SURROGATES 1
+
+#define INVALID_CODEPOINT 0xFFFFFFFF
+#define VALIDATE(expr) if (validate && unlikely(!(expr))) goto invalid
+#define IS_SURROGATE(c) ((c) >= 0xD800 && (c) < 0xE000)
+#define IS_HIGH_SURROGATE(c) ((c) >= 0xD800 && (c) < 0xDC00)
+#define IS_LOW_SURROGATE(c) ((c) >= 0xDC00 && (c) < 0xE000)
+#define IS_UTF8_TAIL(c) (((c) & 0xC0) == 0x80)
+
+/*
+ * Decode the next Unicode codepoint from the string at @in, which has
+ * @remaining >= 1 bytes remaining. Return the number of bytes consumed and
+ * write the decoded codepoint to *c_ret.
*
- * 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
- * details.
+ * If the input might not be a valid string in the source encoding, then
+ * @validate must be specified as %true, and then on invalid input the function
+ * consumes at least one byte and sets *c_ret to INVALID_CODEPOINT. If the
+ * input is guaranteed to be valid, then @validate may be specified as %false.
+ */
+typedef unsigned (*decode_codepoint_fn)(const u8 *in, size_t remaining,
+ bool validate, u32 *c_ret);
+
+/* Encode the Unicode codepoint @c and return the number of bytes used. */
+typedef unsigned (*encode_codepoint_fn)(u32 c, u8 *out);
+
+static forceinline unsigned
+utf8_decode_codepoint(const u8 *in, size_t remaining, bool validate, u32 *c_ret)
+{
+ if (likely(in[0] < 0x80)) { /* U+0...U+7F */
+ *c_ret = in[0];
+ return 1;
+ }
+
+ if (in[0] < 0xE0) { /* U+80...U+7FF */
+ VALIDATE(in[0] >= 0xC2 && remaining >= 2 &&
+ IS_UTF8_TAIL(in[1]));
+ *c_ret = ((u32)(in[0] & 0x1F) << 6) |
+ ((u32)(in[1] & 0x3F) << 0);
+ return 2;
+ }
+
+ if (in[0] < 0xF0) { /* U+800...U+FFFF, possibly excluding surrogates */
+ VALIDATE(remaining >= 3 &&
+ IS_UTF8_TAIL(in[1]) &&
+ IS_UTF8_TAIL(in[2]));
+ *c_ret = ((u32)(in[0] & 0x0F) << 12) |
+ ((u32)(in[1] & 0x3F) << 6) |
+ ((u32)(in[2] & 0x3F) << 0);
+ VALIDATE(*c_ret >= 0x800);
+ #if !ALLOW_UNPAIRED_SURROGATES
+ VALIDATE(!IS_SURROGATE(*c_ret));
+ #endif
+ return 3;
+ }
+
+ /* U+10000...U+10FFFF */
+ VALIDATE(in[0] < 0xF8 && remaining >= 4 &&
+ IS_UTF8_TAIL(in[1]) &&
+ IS_UTF8_TAIL(in[2]) &&
+ IS_UTF8_TAIL(in[3]));
+ *c_ret = ((u32)(in[0] & 0x07) << 18) |
+ ((u32)(in[1] & 0x3F) << 12) |
+ ((u32)(in[2] & 0x3F) << 6) |
+ ((u32)(in[3] & 0x3F) << 0);
+ VALIDATE(*c_ret >= 0x10000 && *c_ret <= 0x10FFFF);
+ return 4;
+
+invalid:
+ *c_ret = INVALID_CODEPOINT;
+ return 1;
+}
+
+static forceinline unsigned
+utf8_encode_codepoint(u32 c, u8 *out)
+{
+ if (likely(c < 0x80)) {
+ out[0] = c;
+ return 1;
+ }
+
+ if (c < 0x800) {
+ out[0] = 0xC0 | (c >> 6);
+ out[1] = 0x80 | (c & 0x3F);
+ return 2;
+ }
+
+ if (c < 0x10000) {
+ out[0] = 0xE0 | (c >> 12);
+ out[1] = 0x80 | ((c >> 6) & 0x3F);
+ out[2] = 0x80 | (c & 0x3F);
+ return 3;
+ }
+
+ out[0] = 0xF0 | (c >> 18);
+ out[1] = 0x80 | ((c >> 12) & 0x3F);
+ out[2] = 0x80 | ((c >> 6) & 0x3F);
+ out[3] = 0x80 | (c & 0x3F);
+ return 4;
+}
+
+static forceinline unsigned
+utf16le_decode_codepoint(const u8 *in, size_t remaining, bool validate,
+ u32 *c_ret)
+{
+ u32 h, l;
+
+ VALIDATE(remaining >= 2);
+ h = get_unaligned_le16(in);
+ if (unlikely(IS_SURROGATE(h))) {
+ /* Surrogate pairs are U+10000...U+10FFFF.
+ * Unpaired surrogates are U+D800...U+DFFF. */
+ #if ALLOW_UNPAIRED_SURROGATES
+ if (unlikely(!IS_HIGH_SURROGATE(h) || remaining < 4))
+ goto unpaired;
+ l = get_unaligned_le16(in + 2);
+ if (unlikely(!IS_LOW_SURROGATE(l)))
+ goto unpaired;
+ #else
+ VALIDATE(IS_HIGH_SURROGATE(h) && remaining >= 4);
+ l = get_unaligned_le16(in + 2);
+ VALIDATE(IS_LOW_SURROGATE(l));
+ #endif
+ *c_ret = 0x10000 + ((h - 0xD800) << 10) + (l - 0xDC00);
+ return 4;
+ }
+#if ALLOW_UNPAIRED_SURROGATES
+unpaired:
+#endif
+ *c_ret = h;
+ return 2;
+
+invalid:
+ *c_ret = INVALID_CODEPOINT;
+ return min(remaining, 2);
+}
+
+static forceinline unsigned
+utf16le_encode_codepoint(u32 c, u8 *out)
+{
+ if (likely(c < 0x10000)) {
+ put_unaligned_le16(c, out);
+ return 2;
+ }
+ c -= 0x10000;
+ put_unaligned_le16(0xD800 + (c >> 10), out);
+ put_unaligned_le16(0xDC00 + (c & 0x3FF), out + 2);
+ return 4;
+}
+
+/*
+ * Convert the string @in of size @in_nbytes from the encoding given by the
+ * @decode_codepoint function to the encoding given by the @encode_codepoint
+ * function. @in does not need to be null-terminated, but a null terminator
+ * will be added to the output string.
+ *
+ * On success, write the allocated output string to @out_ret (must not be NULL)
+ * and its size excluding the null terminator to @out_nbytes_ret (may be NULL).
*
- * You should have received a copy of the GNU General Public License
- * along with wimlib; if not, see http://www.gnu.org/licenses/.
+ * If the input string is malformed, return @ilseq_err with errno set to EILSEQ.
+ * If out of memory, return WIMLIB_ERR_NOMEM with errno set to ENOMEM.
*/
+static forceinline int
+convert_string(const u8 * const in, const size_t in_nbytes,
+ u8 **out_ret, size_t *out_nbytes_ret,
+ int ilseq_err,
+ decode_codepoint_fn decode_codepoint,
+ encode_codepoint_fn encode_codepoint)
+{
+ const u8 * const in_end = in + in_nbytes;
+ const u8 *p_in;
+ u8 *p_out;
+ size_t out_nbytes = 0;
+ u8 *out;
+ u8 tmp[8]; /* assuming no codepoint requires > 8 bytes to encode */
+ u32 c;
-#include "wimlib_internal.h"
+ /* Validate the input string and compute the output size. */
+ for (p_in = in; p_in != in_end; ) {
+ p_in += (*decode_codepoint)(p_in, in_end - p_in, true, &c);
+ if (unlikely(c == INVALID_CODEPOINT)) {
+ errno = EILSEQ;
+ return ilseq_err;
+ }
+ out_nbytes += (*encode_codepoint)(c, tmp);
+ }
-#include <errno.h>
-#include <iconv.h>
-#include <pthread.h>
-#include <stdlib.h>
-
-bool wimlib_mbs_is_utf8 = true;
-
-/* 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, \
+ /* Allocate the output string, including space for a null terminator. */
+ out = MALLOC(out_nbytes + (*encode_codepoint)(0, tmp));
+ if (unlikely(!out))
+ return WIMLIB_ERR_NOMEM;
+
+ /* Do the conversion. */
+ for (p_in = in, p_out = out; p_in != in_end; ) {
+ p_in += (*decode_codepoint)(p_in, in_end - p_in, false, &c);
+ p_out += (*encode_codepoint)(c, p_out);
+ }
+
+ /* Add a null terminator. */
+ (*encode_codepoint)(0, p_out);
+
+ /* Return the output string and its size (by reference). */
+ *out_ret = out;
+ if (out_nbytes_ret)
+ *out_nbytes_ret = out_nbytes;
+ return 0;
+}
+
+int
+utf8_to_utf16le(const char *in, size_t in_nbytes,
+ utf16lechar **out_ret, size_t *out_nbytes_ret)
+{
+ return convert_string((const u8 *)in, in_nbytes,
+ (u8 **)out_ret, out_nbytes_ret,
+ WIMLIB_ERR_INVALID_UTF8_STRING,
+ utf8_decode_codepoint, utf16le_encode_codepoint);
}
-static iconv_t *
-get_iconv(struct iconv_list_head *head)
+int
+utf16le_to_utf8(const utf16lechar *in, size_t in_nbytes,
+ char **out_ret, size_t *out_nbytes_ret)
+{
+ return convert_string((const u8 *)in, in_nbytes,
+ (u8 **)out_ret, out_nbytes_ret,
+ WIMLIB_ERR_INVALID_UTF16_STRING,
+ utf16le_decode_codepoint, utf8_encode_codepoint);
+}
+
+/*
+ * 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.
+ */
+u16 upcase[65536];
+
+void
+init_upcase(void)
{
- 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;
+ /* 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,
+ };
+
+ /* 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 {
- 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;
- }
+ /* Match */
+ do {
+ upcase[i++] = upcase[src_pos++];
+ } while (--length);
}
- } else {
- i = container_of(head->list.next, struct iconv_node, list);
- list_del(head->list.next);
- cd_p = &i->cd;
}
- pthread_mutex_unlock(&head->mutex);
- return cd_p;
+
+ /* Delta filter */
+ for (u32 i = 0; i < ARRAY_LEN(upcase); i++)
+ upcase[i] += i;
}
-static void
-put_iconv(iconv_t *cd)
+/*
+ * 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)
{
- 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;
+ 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;
+ }
+ }
+ if (n1 == n2)
+ return 0;
+ return (n1 < n2) ? -1 : 1;
}
-/* 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,\
- worst_case_len_expr, \
- err_return, \
- err_msg) \
-static ICONV_LIST(iconv_##varname1##_to_##varname2, \
- longname1, longname2); \
- \
-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; \
- \
- /* Worst case length */ \
- chartype2 buf[worst_case_len_expr]; \
- char *inbuf = (char*)in; \
- size_t inbytesleft = in_nbytes; \
- char *outbuf = (char*)buf; \
- size_t outbytesleft = sizeof(buf); \
- 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 = sizeof(buf) - outbytesleft; \
- ret = 0; \
- } \
- put_iconv(cd); \
- return ret; \
-} \
- \
-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; \
-} \
- \
-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; \
- \
- 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) { \
- int errno_save = errno; \
- FREE(out); \
- errno = errno_save; \
- } else { \
- *out_ret = out; \
- *out_nbytes_ret = out_nbytes; \
- } \
- return ret; \
+/* 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 {
+ while (*s1 && *s1 == *s2)
+ s1++, s2++;
+ if (*s1 == *s2)
+ return 0;
+ return (le16_to_cpu(*s1) < le16_to_cpu(*s2)) ? -1 : 1;
+ }
}
-DEFINE_CHAR_CONVERSION_FUNCTIONS(utf16le, "UTF-16LE", utf16lechar,
- mbs, "", mbchar,
- in_nbytes / 2 * MB_CUR_MAX,
- WIMLIB_ERR_UNICODE_STRING_NOT_REPRESENTABLE,
- ERROR("Failed to convert UTF-16LE string "
- "to multibyte string!");
- ERROR("This may be because the UTF-16LE data "
- "could not be represented in your "
- "locale's character encoding."))
-
-DEFINE_CHAR_CONVERSION_FUNCTIONS(mbs, "", mbchar,
- utf16le, "UTF-16LE", utf16lechar,
- in_nbytes * 2,
- WIMLIB_ERR_INVALID_MULTIBYTE_STRING,
- ERROR_WITH_ERRNO("Failed to convert multibyte "
- "string \"%s\" to UTF-16LE string!", in);
- ERROR("If the data you provided was UTF-8, please make sure "
- "the character encoding of your current locale is UTF-8."))
-
-DEFINE_CHAR_CONVERSION_FUNCTIONS(utf8, "UTF-8", utf8char,
- mbs, "", mbchar,
- in_nbytes,
- 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 "
- "in your locale's character encoding."))
-
-static void
-iconv_cleanup(struct iconv_list_head *head)
+/* Duplicate a UTF-16 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 *s, size_t size)
{
- 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);
+ utf16lechar *dup = MALLOC(size + sizeof(utf16lechar));
+ if (dup) {
+ memcpy(dup, s, size);
+ dup[size / sizeof(utf16lechar)] = 0;
}
+ return dup;
}
-void
-iconv_global_cleanup()
+/* Duplicate a null-terminated UTF-16 string. */
+utf16lechar *
+utf16le_dup(const utf16lechar *s)
+{
+ return memdup(s, utf16le_len_bytes(s) + sizeof(utf16lechar));
+}
+
+/* Return the length, in bytes, of a null terminated UTF-16 string, excluding
+ * the null terminator. */
+size_t
+utf16le_len_bytes(const utf16lechar *s)
{
- iconv_cleanup(&iconv_utf16le_to_mbs);
- iconv_cleanup(&iconv_mbs_to_utf16le);
- iconv_cleanup(&iconv_utf8_to_mbs);
+ const utf16lechar *p = s;
+ while (*p)
+ p++;
+ return (p - s) * sizeof(utf16lechar);
}
-bool
-utf8_str_contains_nonascii_chars(const utf8char *utf8_str)
+/* Return the length, in UTF-16 coding units, of a null terminated UTF-16
+ * string, excluding the null terminator. */
+size_t
+utf16le_len_chars(const utf16lechar *s)
{
- do {
- if ((unsigned char)*utf8_str > 127)
- return true;
- } while (*++utf8_str);
- return false;
+ return utf16le_len_bytes(s) / sizeof(utf16lechar);
}
git://wimlib.net / wimlib / blobdiff