X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fencoding.c;h=cf5dd66e04f058205043421062b8908d1403e7e4;hp=42f7e95f6ec378e90cd2e35c543457eab28f675c;hb=913e96c7a1c138973912eb4b133a27796fd59e2e;hpb=d9675dd5814394373d9871c6e9b7b35325b3d21d diff --git a/src/encoding.c b/src/encoding.c index 42f7e95f..cf5dd66e 100644 --- a/src/encoding.c +++ b/src/encoding.c @@ -27,6 +27,7 @@ #include "wimlib.h" #include "wimlib/encoding.h" +#include "wimlib/endianness.h" #include "wimlib/error.h" #include "wimlib/list.h" #include "wimlib/util.h" @@ -381,3 +382,187 @@ iconv_global_cleanup(void) iconv_cleanup(&iconv_utf8_to_utf16le); #endif } + +/* Upper case table --- Borrowed from NTFS-3g + * + * 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 is GPLv2 or later. + */ + +/** + * 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. + * + * Note, @uc_len must be at least 128kiB in size or bad things will happen! + */ +static void +ntfs_upcase_table_build(utf16lechar *uc, u32 uc_len) +{ + /* + * 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 int 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}, {0} + }; + /* + * "Start" is exclusive and "End" is inclusive, every second value is + * decremented by one. + */ + static int 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}, {0} + }; + /* + * Set the Unicode character at offset "Offset" to "Value". Note, + * "Value" is host endian. + */ + static int 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}, {0} + }; + int i, r; + int k, off; + + memset((char*)uc, 0, uc_len); + uc_len >>= 1; + if (uc_len > 65536) + uc_len = 65536; + for (i = 0; (u32)i < uc_len; i++) + uc[i] = cpu_to_le16(i); + for (r = 0; uc_run_table[r][0]; r++) { + off = uc_run_table[r][2]; + for (i = uc_run_table[r][0]; i < uc_run_table[r][1]; i++) + uc[i] = cpu_to_le16(i + off); + } + for (r = 0; uc_dup_table[r][0]; r++) + for (i = uc_dup_table[r][0]; i < uc_dup_table[r][1]; i += 2) + uc[i + 1] = cpu_to_le16(i); + for (r = 0; uc_byte_table[r][0]; r++) { + k = uc_byte_table[r][1]; + uc[uc_byte_table[r][0]] = cpu_to_le16(k); + } +} + +static utf16lechar upcase[65536]; + +void +init_upcase(void) +{ + ntfs_upcase_table_build(upcase, ARRAY_LEN(upcase)); +} + +/* 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 = le16_to_cpu(upcase[le16_to_cpu(s1[i])]); + u16 c2 = le16_to_cpu(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; +} + +/* 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 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; + } + } +#endif + if (ret == 0) { + FREE(*name_utf16le_ret); + *name_utf16le_ret = name_utf16le; + *name_utf16le_nbytes_ret = name_utf16le_nbytes; + } + return ret; +} +