X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Fencoding.c;h=fec6e06a5997eb82ca7591046ce2edacd366eacd;hb=1dbfb8e36f81ced8474ce048c2d0e18ac07de60d;hp=de0435811c9279d4d751d6f24ad8fdab09274c5e;hpb=14baa6ae892debbaa18dba8119931580efd0e517;p=wimlib diff --git a/src/encoding.c b/src/encoding.c index de043581..fec6e06a 100644 --- a/src/encoding.c +++ b/src/encoding.c @@ -1,7 +1,5 @@ /* - * 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. + * encoding.c */ /* @@ -23,16 +21,31 @@ * along with wimlib; if not, see http://www.gnu.org/licenses/. */ -#include "config.h" -#include "wimlib_internal.h" -#include -#include "list.h" +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "wimlib.h" +#include "wimlib/encoding.h" +#include "wimlib/endianness.h" +#include "wimlib/error.h" +#include "wimlib/list.h" +#include "wimlib/util.h" +#include #include +#include #include +#include -bool wimlib_mbs_is_utf8 = false; +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; @@ -54,226 +67,464 @@ struct iconv_list_head name = { \ .mutex = PTHREAD_MUTEX_INITIALIZER, \ } -static ICONV_LIST(iconv_mbs_to_utf16le, "", "UTF-16LE"); -static ICONV_LIST(iconv_utf16le_to_mbs, "UTF-16LE", ""); - static iconv_t * get_iconv(struct iconv_list_head *head) { 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) { - goto out_unlock; + 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) { + if (i) { + i->head = head; + i->cd = cd; + cd_p = &i->cd; + } else { iconv_close(cd); - cd = (iconv_t)-1; - goto out_unlock; + cd_p = NULL; } - i->head = head; } } else { i = container_of(head->list.next, struct iconv_node, list); list_del(head->list.next); + cd_p = &i->cd; } - cd = i->cd; -out_unlock: pthread_mutex_unlock(&head->mutex); - return cd; + 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; } -int -mbs_to_utf16le_nbytes(const mbchar *mbs, size_t mbs_nbytes, - size_t *utf16le_nbytes_ret) -{ - iconv_t *cd = get_iconv(&iconv_mbs_to_utf16le); - if (*cd == (iconv_t)-1) - return WIMLIB_ERR_ICONV_NOT_AVAILABLE; - - /* Worst case length */ - utf16lechar buf[mbs_nbytes * 2]; - char *inbuf = (char*)mbs; - char *outbuf = (char*)buf; - size_t outbytesleft = sizeof(buf); - size_t inbytesleft = mbs_nbytes; - size_t len; - int ret; - - len = iconv(*cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft); - if (len == (size_t)-1) { - ret = WIMLIB_ERR_INVALID_MULTIBYTE_STRING; - } else { - *utf16le_nbytes_ret = sizeof(buf) - outbytesleft; - ret = 0; - } - put_iconv(cd); - return ret; +/* 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; \ + \ + /* 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; \ +} \ + \ +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; \ } +#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."), + ) + +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 -utf16le_to_mbs_nbytes(const utf16lechar *utf16le_str, size_t utf16le_nbytes, - size_t *mbs_nbytes_ret) +tstr_to_utf8_simple(const tchar *tstr, char **out) { - iconv_t *cd = get_iconv(&iconv_utf16le_to_mbs); - if (*cd == (iconv_t)-1) - return WIMLIB_ERR_ICONV_NOT_AVAILABLE; - - /* Worst case length */ - mbchar buf[utf16le_nbytes / 2 * MB_CUR_MAX]; - char *inbuf = (char*)utf16le_str; - char *outbuf = (char*)buf; - size_t outbytesleft = sizeof(buf); - size_t inbytesleft = utf16le_nbytes; - size_t len; - int ret; - - len = iconv(*cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft); - if (len == (size_t)-1) { - ERROR("Could not convert \"%W\" to encoding of current locale", - utf16le_str); - /* EILSEQ is supposed to mean that the *input* is invalid, but - * it's also returned if any input characters are not - * representable in the output encoding. (The actual behavior - * in this case is undefined for some reason...). Assume it's - * the latter error case. */ - ret = WIMLIB_ERR_UNICODE_STRING_NOT_REPRESENTABLE; - } else { - *mbs_nbytes_ret = sizeof(buf) - outbytesleft; - ret = 0; - } - put_iconv(cd); - return ret; + size_t out_nbytes; + return tstr_to_utf8(tstr, tstrlen(tstr) * sizeof(tchar), + out, &out_nbytes); } int -mbs_to_utf16le_buf(const mbchar *mbs, size_t mbs_nbytes, - utf16lechar *utf16le_str) +utf8_to_tstr_simple(const char *utf8str, tchar **out) { - iconv_t *cd = get_iconv(&iconv_mbs_to_utf16le); - if (*cd == (iconv_t)-1) - return WIMLIB_ERR_ICONV_NOT_AVAILABLE; - - char *inbuf = (char*)mbs; - size_t inbytesleft = mbs_nbytes; - char *outbuf = (char*)utf16le_str; - size_t outbytesleft = SIZE_MAX; - size_t len; - int ret; - - len = iconv(*cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft); - if (len == (size_t)-1) { - ret = WIMLIB_ERR_INVALID_MULTIBYTE_STRING; - } else { - ret = 0; - } - put_iconv(cd); - return ret; + size_t out_nbytes; + return utf8_to_tstr(utf8str, strlen(utf8str), out, &out_nbytes); } -int -utf16le_to_mbs_buf(const utf16lechar *utf16le_str, size_t utf16le_nbytes, - mbchar *mbs) +static void +iconv_cleanup(struct iconv_list_head *head) { - int ret; - iconv_t *cd = get_iconv(&iconv_utf16le_to_mbs); - if (*cd == (iconv_t)-1) - return WIMLIB_ERR_ICONV_NOT_AVAILABLE; - - char *inbuf = (char*)utf16le_str; - size_t inbytesleft; - char *outbuf = (char*)mbs; - size_t outbytesleft = SIZE_MAX; - size_t len; - - len = iconv(*cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft); - if (len == (size_t)-1) { - ret = WIMLIB_ERR_INVALID_UTF16_STRING; - } else { - ret = 0; + 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); } - mbs[SIZE_MAX - inbytesleft] = '\0'; - put_iconv(cd); - return ret; } -int -mbs_to_utf16le(const mbchar *mbs, size_t mbs_nbytes, - utf16lechar **utf16le_ret, size_t *utf16le_nbytes_ret) +void +iconv_global_cleanup(void) { - int ret; - utf16lechar *utf16le_str; - size_t utf16le_nbytes; - - ret = mbs_to_utf16le_nbytes(mbs, mbs_nbytes, - &utf16le_nbytes); - if (ret) - return ret; - - utf16le_str = MALLOC(utf16le_nbytes + 1); - if (!utf16le_str) - return WIMLIB_ERR_NOMEM; - - ret = mbs_to_utf16le_buf(mbs, mbs_nbytes, utf16le_str); - if (ret) { - FREE(utf16le_str); - } else { - *utf16le_ret = utf16le_str; - *utf16le_nbytes_ret = utf16le_nbytes; - } - return ret; + 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 } +/* 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. + */ -int -utf16le_to_mbs(const utf16lechar *utf16le_str, size_t utf16le_nbytes, - mbchar **mbs_ret, size_t *mbs_nbytes_ret) +/** + * 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) { - int ret; - mbchar *mbs; - size_t mbs_nbytes; - - ret = utf16le_to_mbs_nbytes(utf16le_str, utf16le_nbytes, - &mbs_nbytes); - if (ret) - return ret; - - mbs = MALLOC(mbs_nbytes + 1); - if (!mbs) - return WIMLIB_ERR_NOMEM; - - ret = utf16le_to_mbs_buf(utf16le_str, utf16le_nbytes, mbs); - if (ret) { - FREE(mbs); - } else { - *mbs_ret = mbs; - *mbs_nbytes_ret = mbs_nbytes; + /* + * 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); } - return ret; } -bool -utf8_str_contains_nonascii_chars(const utf8char *utf8_str) +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) { - do { - if ((unsigned char)*utf8_str > 127) - return false; - } while (*++utf8_str); - return true; + 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; }