/** * unistr.c - Unicode string handling. Part of the Linux-NTFS project. * * Copyright (c) 2000-2006 Anton Altaparmakov * Copyright (c) 2005-2007 Yura Pakhuchiy * * This program/include file 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 2 of the License, or * (at your option) any later version. * * This program/include 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program (in the main directory of the Linux-NTFS * distribution in the file COPYING); if not, write to the Free Software * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #ifdef HAVE_STDIO_H #include #endif #ifdef HAVE_STDLIB_H #include #endif #ifdef HAVE_WCHAR_H #include #endif #ifdef HAVE_STRING_H #include #endif #ifdef HAVE_ERRNO_H #include #endif #include "attrib.h" #include "endians.h" #include "types.h" #include "unistr.h" #include "debug.h" #include "logging.h" /* * IMPORTANT * ========= * * All these routines assume that the Unicode characters are in little endian * encoding inside the strings!!! */ /* * This is used by the name collation functions to quickly determine what * characters are (in)valid. */ #if 0 static const u8 legal_ansi_char_array[0x40] = { 0x00, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x17, 0x07, 0x18, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x18, 0x16, 0x16, 0x17, 0x07, 0x00, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x04, 0x16, 0x18, 0x16, 0x18, 0x18, }; #endif /** * ntfs_names_are_equal - compare two Unicode names for equality * @s1: name to compare to @s2 * @s1_len: length in Unicode characters of @s1 * @s2: name to compare to @s1 * @s2_len: length in Unicode characters of @s2 * @ic: ignore case bool * @upcase: upcase table (only if @ic == IGNORE_CASE) * @upcase_size: length in Unicode characters of @upcase (if present) * * Compare the names @s1 and @s2 and return TRUE (1) if the names are * identical, or FALSE (0) if they are not identical. If @ic is IGNORE_CASE, * the @upcase table is used to perform a case insensitive comparison. */ BOOL ntfs_names_are_equal(const ntfschar *s1, size_t s1_len, const ntfschar *s2, size_t s2_len, const IGNORE_CASE_BOOL ic, const ntfschar *upcase, const u32 upcase_size) { if (s1_len != s2_len) return FALSE; if (!s1_len) return TRUE; if (ic == CASE_SENSITIVE) return ntfs_ucsncmp(s1, s2, s1_len) ? FALSE: TRUE; return ntfs_ucsncasecmp(s1, s2, s1_len, upcase, upcase_size) ? FALSE: TRUE; } /** * ntfs_names_collate - collate two Unicode names * @name1: first Unicode name to compare * @name1_len: length of first Unicode name to compare * @name2: second Unicode name to compare * @name2_len: length of second Unicode name to compare * @err_val: if @name1 contains an invalid character return this value * @ic: either CASE_SENSITIVE or IGNORE_CASE * @upcase: upcase table (ignored if @ic is CASE_SENSITIVE) * @upcase_len: upcase table size (ignored if @ic is CASE_SENSITIVE) * * ntfs_names_collate() collates two Unicode names and returns: * * -1 if the first name collates before the second one, * 0 if the names match, * 1 if the second name collates before the first one, or * @err_val if an invalid character is found in @name1 during the comparison. * * The following characters are considered invalid: '"', '*', '<', '>' and '?'. */ int ntfs_names_collate(const ntfschar *name1, const u32 name1_len, const ntfschar *name2, const u32 name2_len, const int err_val __attribute__((unused)), const IGNORE_CASE_BOOL ic, const ntfschar *upcase, const u32 upcase_len) { u32 cnt; u16 c1, c2; #ifdef DEBUG if (!name1 || !name2 || (ic && (!upcase || !upcase_len))) { ntfs_log_debug("ntfs_names_collate received NULL pointer!\n"); exit(1); } #endif for (cnt = 0; cnt < min(name1_len, name2_len); ++cnt) { c1 = le16_to_cpu(*name1); name1++; c2 = le16_to_cpu(*name2); name2++; if (ic) { if (c1 < upcase_len) c1 = le16_to_cpu(upcase[c1]); if (c2 < upcase_len) c2 = le16_to_cpu(upcase[c2]); } #if 0 if (c1 < 64 && legal_ansi_char_array[c1] & 8) return err_val; #endif if (c1 < c2) return -1; if (c1 > c2) return 1; } if (name1_len < name2_len) return -1; if (name1_len == name2_len) return 0; /* name1_len > name2_len */ #if 0 c1 = le16_to_cpu(*name1); if (c1 < 64 && legal_ansi_char_array[c1] & 8) return err_val; #endif return 1; } /** * ntfs_ucsncmp - compare two little endian Unicode strings * @s1: first string * @s2: second string * @n: maximum unicode characters to compare * * Compare the first @n characters of the Unicode strings @s1 and @s2, * The strings in little endian format and appropriate le16_to_cpu() * conversion is performed on non-little endian machines. * * The function returns an integer less than, equal to, or greater than zero * if @s1 (or the first @n Unicode characters thereof) is found, respectively, * to be less than, to match, or be greater than @s2. */ int ntfs_ucsncmp(const ntfschar *s1, const ntfschar *s2, size_t n) { u16 c1, c2; size_t i; #ifdef DEBUG if (!s1 || !s2) { ntfs_log_debug("ntfs_wcsncmp() received NULL pointer!\n"); exit(1); } #endif for (i = 0; i < n; ++i) { c1 = le16_to_cpu(s1[i]); c2 = le16_to_cpu(s2[i]); if (c1 < c2) return -1; if (c1 > c2) return 1; if (!c1) break; } return 0; } /** * ntfs_ucsncasecmp - compare two little endian Unicode strings, ignoring case * @s1: first string * @s2: second string * @n: maximum unicode characters to compare * @upcase: upcase table * @upcase_size: upcase table size in Unicode characters * * Compare the first @n characters of the Unicode strings @s1 and @s2, * ignoring case. The strings in little endian format and appropriate * le16_to_cpu() conversion is performed on non-little endian machines. * * Each character is uppercased using the @upcase table before the comparison. * * The function returns an integer less than, equal to, or greater than zero * if @s1 (or the first @n Unicode characters thereof) is found, respectively, * to be less than, to match, or be greater than @s2. */ int ntfs_ucsncasecmp(const ntfschar *s1, const ntfschar *s2, size_t n, const ntfschar *upcase, const u32 upcase_size) { u16 c1, c2; size_t i; #ifdef DEBUG if (!s1 || !s2 || !upcase) { ntfs_log_debug("ntfs_wcsncasecmp() received NULL pointer!\n"); exit(1); } #endif for (i = 0; i < n; ++i) { if ((c1 = le16_to_cpu(s1[i])) < upcase_size) c1 = le16_to_cpu(upcase[c1]); if ((c2 = le16_to_cpu(s2[i])) < upcase_size) c2 = le16_to_cpu(upcase[c2]); if (c1 < c2) return -1; if (c1 > c2) return 1; if (!c1) break; } return 0; } /** * ntfs_ucsnlen - determine the length of a little endian Unicode string * @s: pointer to Unicode string * @maxlen: maximum length of string @s * * Return the number of Unicode characters in the little endian Unicode * string @s up to a maximum of maxlen Unicode characters, not including * the terminating (ntfschar)'\0'. If there is no (ntfschar)'\0' between @s * and @s + @maxlen, @maxlen is returned. * * This function never looks beyond @s + @maxlen. */ u32 ntfs_ucsnlen(const ntfschar *s, u32 maxlen) { u32 i; for (i = 0; i < maxlen; i++) { if (!le16_to_cpu(s[i])) break; } return i; } /** * ntfs_ucsndup - duplicate little endian Unicode string * @s: pointer to Unicode string * @maxlen: maximum length of string @s * * Return a pointer to a new little endian Unicode string which is a duplicate * of the string s. Memory for the new string is obtained with malloc(3), and * can be freed with free(3). * * A maximum of @maxlen Unicode characters are copied and a terminating * (ntfschar)'\0' little endian Unicode character is added. * * This function never looks beyond @s + @maxlen. * * Return a pointer to the new little endian Unicode string on success and NULL * on failure with errno set to the error code. */ ntfschar *ntfs_ucsndup(const ntfschar *s, u32 maxlen) { ntfschar *dst; u32 len; len = ntfs_ucsnlen(s, maxlen); dst = ntfs_malloc((len + 1) * sizeof(ntfschar)); if (dst) { memcpy(dst, s, len * sizeof(ntfschar)); dst[len] = 0; } return dst; } /** * ntfs_name_upcase - Map an Unicode name to its uppercase equivalent * @name: * @name_len: * @upcase: * @upcase_len: * * Description... * * Returns: */ void ntfs_name_upcase(ntfschar *name, u32 name_len, const ntfschar *upcase, const u32 upcase_len) { u32 i; u16 u; for (i = 0; i < name_len; i++) if ((u = le16_to_cpu(name[i])) < upcase_len) name[i] = upcase[u]; } /** * ntfs_file_value_upcase - Convert a filename to upper case * @file_name_attr: * @upcase: * @upcase_len: * * Description... * * Returns: */ void ntfs_file_value_upcase(FILE_NAME_ATTR *file_name_attr, const ntfschar *upcase, const u32 upcase_len) { ntfs_name_upcase((ntfschar*)&file_name_attr->file_name, file_name_attr->file_name_length, upcase, upcase_len); } /** * ntfs_file_values_compare - Which of two filenames should be listed first * @file_name_attr1: * @file_name_attr2: * @err_val: * @ic: * @upcase: * @upcase_len: * * Description... * * Returns: */ int ntfs_file_values_compare(const FILE_NAME_ATTR *file_name_attr1, const FILE_NAME_ATTR *file_name_attr2, const int err_val, const IGNORE_CASE_BOOL ic, const ntfschar *upcase, const u32 upcase_len) { return ntfs_names_collate((ntfschar*)&file_name_attr1->file_name, file_name_attr1->file_name_length, (ntfschar*)&file_name_attr2->file_name, file_name_attr2->file_name_length, err_val, ic, upcase, upcase_len); } /** * ntfs_ucstombs - convert a little endian Unicode string to a multibyte string * @ins: input Unicode string buffer * @ins_len: length of input string in Unicode characters * @outs: on return contains the (allocated) output multibyte string * @outs_len: length of output buffer in bytes * * Convert the input little endian, 2-byte Unicode string @ins, of length * @ins_len into the multibyte string format dictated by the current locale. * * If *@outs is NULL, the function allocates the string and the caller is * responsible for calling free(*@outs); when finished with it. * * On success the function returns the number of bytes written to the output * string *@outs (>= 0), not counting the terminating NULL byte. If the output * string buffer was allocated, *@outs is set to it. * * On error, -1 is returned, and errno is set to the error code. The following * error codes can be expected: * EINVAL Invalid arguments (e.g. @ins or @outs is NULL). * EILSEQ The input string cannot be represented as a multibyte * sequence according to the current locale. * ENAMETOOLONG Destination buffer is too small for input string. * ENOMEM Not enough memory to allocate destination buffer. */ int ntfs_ucstombs(const ntfschar *ins, const int ins_len, char **outs, int outs_len) { char *mbs; wchar_t wc; int i, o, mbs_len; int cnt = 0; #ifdef HAVE_MBSINIT mbstate_t mbstate; #endif if (!ins || !outs) { errno = EINVAL; return -1; } mbs = *outs; mbs_len = outs_len; if (mbs && !mbs_len) { errno = ENAMETOOLONG; return -1; } if (!mbs) { mbs_len = (ins_len + 1) * MB_CUR_MAX; mbs = (char*)ntfs_malloc(mbs_len); if (!mbs) return -1; } #ifdef HAVE_MBSINIT memset(&mbstate, 0, sizeof(mbstate)); #else wctomb(NULL, 0); #endif for (i = o = 0; i < ins_len; i++) { /* Reallocate memory if necessary or abort. */ if ((int)(o + MB_CUR_MAX) > mbs_len) { char *tc; if (mbs == *outs) { errno = ENAMETOOLONG; return -1; } tc = (char*)ntfs_malloc((mbs_len + 64) & ~63); if (!tc) goto err_out; memcpy(tc, mbs, mbs_len); mbs_len = (mbs_len + 64) & ~63; free(mbs); mbs = tc; } /* Convert the LE Unicode character to a CPU wide character. */ wc = (wchar_t)le16_to_cpu(ins[i]); if (!wc) break; /* Convert the CPU endian wide character to multibyte. */ #ifdef HAVE_MBSINIT cnt = wcrtomb(mbs + o, wc, &mbstate); #else cnt = wctomb(mbs + o, wc); #endif if (cnt == -1) goto err_out; if (cnt <= 0) { ntfs_log_debug("Eeek. cnt <= 0, cnt = %i\n", cnt); errno = EINVAL; goto err_out; } o += cnt; } #ifdef HAVE_MBSINIT /* Make sure we are back in the initial state. */ if (!mbsinit(&mbstate)) { ntfs_log_debug("Eeek. mbstate not in initial state!\n"); errno = EILSEQ; goto err_out; } #endif /* Now write the NULL character. */ mbs[o] = 0; if (*outs != mbs) *outs = mbs; return o; err_out: if (mbs != *outs) free(mbs); return -1; } /** * ntfs_mbstoucs - convert a multibyte string to a little endian Unicode string * @ins: input multibyte string buffer * @outs: on return contains the (allocated) output Unicode string * @outs_len: length of output buffer in Unicode characters * * Convert the input multibyte string @ins, from the current locale into the * corresponding little endian, 2-byte Unicode string. * * If *@outs is NULL, the function allocates the string and the caller is * responsible for calling free(*@outs); when finished with it. * * On success the function returns the number of Unicode characters written to * the output string *@outs (>= 0), not counting the terminating Unicode NULL * character. If the output string buffer was allocated, *@outs is set to it. * * On error, -1 is returned, and errno is set to the error code. The following * error codes can be expected: * EINVAL Invalid arguments (e.g. @ins or @outs is NULL). * EILSEQ The input string cannot be represented as a Unicode * string according to the current locale. * ENAMETOOLONG Destination buffer is too small for input string. * ENOMEM Not enough memory to allocate destination buffer. */ int ntfs_mbstoucs(const char *ins, ntfschar **outs, int outs_len) { ntfschar *ucs; const char *s; wchar_t wc; int i, o, cnt, ins_len, ucs_len, ins_size; #ifdef HAVE_MBSINIT mbstate_t mbstate; #endif if (!ins || !outs) { errno = EINVAL; return -1; } ucs = *outs; ucs_len = outs_len; if (ucs && !ucs_len) { errno = ENAMETOOLONG; return -1; } /* Determine the size of the multi-byte string in bytes. */ ins_size = strlen(ins); /* Determine the length of the multi-byte string. */ s = ins; #if defined(HAVE_MBSINIT) memset(&mbstate, 0, sizeof(mbstate)); ins_len = mbsrtowcs(NULL, (const char **)&s, 0, &mbstate); #ifdef __CYGWIN32__ if (!ins_len && *ins) { /* Older Cygwin had broken mbsrtowcs() implementation. */ ins_len = strlen(ins); } #endif #elif !defined(DJGPP) ins_len = mbstowcs(NULL, s, 0); #else /* Eeek!!! DJGPP has broken mbstowcs() implementation!!! */ ins_len = strlen(ins); #endif if (ins_len == -1) return ins_len; #ifdef HAVE_MBSINIT if ((s != ins) || !mbsinit(&mbstate)) { #else if (s != ins) { #endif errno = EILSEQ; return -1; } /* Add the NULL terminator. */ ins_len++; if (!ucs) { ucs_len = ins_len; ucs = (ntfschar*)ntfs_malloc(ucs_len * sizeof(ntfschar)); if (!ucs) return -1; } #ifdef HAVE_MBSINIT memset(&mbstate, 0, sizeof(mbstate)); #else mbtowc(NULL, NULL, 0); #endif for (i = o = cnt = 0; i < ins_size; i += cnt, o++) { /* Reallocate memory if necessary or abort. */ if (o >= ucs_len) { ntfschar *tc; if (ucs == *outs) { errno = ENAMETOOLONG; return -1; } /* * We will never get here but hey, it's only a bit of * extra code... */ ucs_len = (ucs_len * sizeof(ntfschar) + 64) & ~63; tc = (ntfschar*)realloc(ucs, ucs_len); if (!tc) goto err_out; ucs = tc; ucs_len /= sizeof(ntfschar); } /* Convert the multibyte character to a wide character. */ #ifdef HAVE_MBSINIT cnt = mbrtowc(&wc, ins + i, ins_size - i, &mbstate); #else cnt = mbtowc(&wc, ins + i, ins_size - i); #endif if (!cnt) break; if (cnt == -1) goto err_out; if (cnt < -1) { ntfs_log_trace("Eeek. cnt = %i\n", cnt); errno = EINVAL; goto err_out; } /* Make sure we are not overflowing the NTFS Unicode set. */ if ((unsigned long)wc >= (unsigned long)(1 << (8 * sizeof(ntfschar)))) { errno = EILSEQ; goto err_out; } /* Convert the CPU wide character to a LE Unicode character. */ ucs[o] = cpu_to_le16(wc); } #ifdef HAVE_MBSINIT /* Make sure we are back in the initial state. */ if (!mbsinit(&mbstate)) { ntfs_log_trace("Eeek. mbstate not in initial state!\n"); errno = EILSEQ; goto err_out; } #endif /* Now write the NULL character. */ ucs[o] = 0; if (*outs != ucs) *outs = ucs; return o; err_out: if (ucs != *outs) free(ucs); return -1; } /** * ntfs_upcase_table_build - build the default upcase table for NTFS * @uc: destination buffer where to store the built table * @uc_len: size of destination buffer in bytes * * ntfs_upcase_table_build() builds the default upcase table for NTFS and * stores it in the caller supplied buffer @uc of size @uc_len. * * The generated $UpCase table is the one used by Windows Vista. * * Note, @uc_len must be at least 128kiB in size or bad things will happen! */ void ntfs_upcase_table_build(ntfschar *uc, u32 uc_len) { /* * "Start" is inclusive and "End" is exclusive, every value has the * value of "Add" added to it. */ static int add[][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}, {0} }; /* * "Start" is exclusive and "End" is inclusive, every second value is * decremented by one. */ static int skip_dec[][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}, {0} }; /* * Set the Unicode character at offset "Offset" to "Value". Note, * "Value" is host endian. */ static int set[][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}, {0} }; unsigned i, r; memset(uc, 0, uc_len); uc_len /= 2; /* Start with a one-to-one mapping, i.e. no upcasing happens at all. */ for (i = 0; i < uc_len; i++) uc[i] = cpu_to_le16(i); /* Adjust specified runs by the specified amount. */ for (r = 0; add[r][0]; r++) for (i = add[r][0]; i < add[r][1]; i++) uc[i] = cpu_to_le16(le16_to_cpu(uc[i]) + add[r][2]); /* Decrement every second value in specified runs. */ for (r = 0; skip_dec[r][0]; r++) for (i = skip_dec[r][0]; i < skip_dec[r][1]; i += 2) uc[i + 1] = cpu_to_le16(le16_to_cpu(uc[i + 1]) - 1); /* Set specified characters to specified values. */ for (r = 0; set[r][0]; r++) uc[set[r][0]] = cpu_to_le16(set[r][1]); } /** * ntfs_str2ucs - convert a string to a valid NTFS file name * @s: input string * @len: length of output buffer in Unicode characters * * Convert the input @s string into the corresponding little endian, * 2-byte Unicode string. The length of the converted string is less * or equal to the maximum length allowed by the NTFS format (255). * * If @s is NULL then return AT_UNNAMED. * * On success the function returns the Unicode string in an allocated * buffer and the caller is responsible to free it when it's not needed * anymore. * * On error NULL is returned and errno is set to the error code. */ ntfschar *ntfs_str2ucs(const char *s, int *len) { ntfschar *ucs = NULL; if (s && ((*len = ntfs_mbstoucs(s, &ucs, 0)) == -1)) { ntfs_log_perror("Couldn't convert '%s' to Unicode", s); return NULL; } if (*len > NTFS_MAX_NAME_LEN) { free(ucs); errno = ENAMETOOLONG; return NULL; } if (!ucs || !*len) { ucs = AT_UNNAMED; *len = 0; } return ucs; } /** * ntfs_ucsfree - free memory allocated by ntfs_str2ucs() * @ucs: input string to be freed * * Free memory at @ucs and which was allocated by ntfs_str2ucs. * * Return value: none. */ void ntfs_ucsfree(ntfschar *ucs) { if (ucs && (ucs != AT_UNNAMED)) free(ucs); }