/** @file * IPRT - String Manipulation, UTF-16 encoding. */ /* * Copyright (C) 2006-2016 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ #ifndef ___iprt_utf16_h #define ___iprt_utf16_h #include RT_C_DECLS_BEGIN /** @defgroup rt_str_utf16 UTF-16 String Manipulation * @ingroup grp_rt_str * @{ */ /** * Allocates memory for UTF-16 string storage (default tag). * * You should normally not use this function, except if there is some very * custom string handling you need doing that isn't covered by any of the other * APIs. * * @returns Pointer to the allocated UTF-16 string. The first wide char is * always set to the string terminator char, the contents of the * remainder of the memory is undefined. The string must be freed by * calling RTUtf16Free. * * NULL is returned if the allocation failed. Please translate this to * VERR_NO_UTF16_MEMORY and not VERR_NO_MEMORY. Also consider * RTUtf16AllocEx if an IPRT status code is required. * * @param cb How many bytes to allocate, will be rounded up * to a multiple of two. If this is zero, we will * allocate a terminator wide char anyway. */ #define RTUtf16Alloc(cb) RTUtf16AllocTag((cb), RTSTR_TAG) /** * Allocates memory for UTF-16 string storage (custom tag). * * You should normally not use this function, except if there is some very * custom string handling you need doing that isn't covered by any of the other * APIs. * * @returns Pointer to the allocated UTF-16 string. The first wide char is * always set to the string terminator char, the contents of the * remainder of the memory is undefined. The string must be freed by * calling RTUtf16Free. * * NULL is returned if the allocation failed. Please translate this to * VERR_NO_UTF16_MEMORY and not VERR_NO_MEMORY. Also consider * RTUtf16AllocExTag if an IPRT status code is required. * * @param cb How many bytes to allocate, will be rounded up * to a multiple of two. If this is zero, we will * allocate a terminator wide char anyway. * @param pszTag Allocation tag used for statistics and such. */ RTDECL(PRTUTF16) RTUtf16AllocTag(size_t cb, const char *pszTag); /** * Reallocates the specified UTF-16 string (default tag). * * You should normally not use this function, except if there is some very * custom string handling you need doing that isn't covered by any of the other * APIs. * * @returns VINF_SUCCESS. * @retval VERR_NO_UTF16_MEMORY if we failed to reallocate the string, @a * *ppwsz remains unchanged. * * @param ppwsz Pointer to the string variable containing the * input and output string. * * When not freeing the string, the result will * always have the last RTUTF16 set to the * terminator character so that when used for * string truncation the result will be a valid * C-style string (your job to keep it a valid * UTF-16 string). * * When the input string is NULL and we're supposed * to reallocate, the returned string will also * have the first RTUTF16 set to the terminator * char so it will be a valid C-style string. * * @param cbNew When @a cbNew is zero, we'll behave like * RTUtf16Free and @a *ppwsz will be set to NULL. * * When not zero, this will be rounded up to a * multiple of two, and used as the new size of the * memory backing the string, i.e. it includes the * terminator (RTUTF16) char. */ #define RTUtf16Realloc(ppwsz, cbNew) RTUtf16ReallocTag((ppwsz), (cbNew), RTSTR_TAG) /** * Reallocates the specified UTF-16 string (custom tag). * * You should normally not use this function, except if there is some very * custom string handling you need doing that isn't covered by any of the other * APIs. * * @returns VINF_SUCCESS. * @retval VERR_NO_UTF16_MEMORY if we failed to reallocate the string, @a * *ppwsz remains unchanged. * * @param ppwsz Pointer to the string variable containing the * input and output string. * * When not freeing the string, the result will * always have the last RTUTF16 set to the * terminator character so that when used for * string truncation the result will be a valid * C-style string (your job to keep it a valid * UTF-16 string). * * When the input string is NULL and we're supposed * to reallocate, the returned string will also * have the first RTUTF16 set to the terminator * char so it will be a valid C-style string. * * @param cbNew When @a cbNew is zero, we'll behave like * RTUtf16Free and @a *ppwsz will be set to NULL. * * When not zero, this will be rounded up to a * multiple of two, and used as the new size of the * memory backing the string, i.e. it includes the * terminator (RTUTF16) char. * @param pszTag Allocation tag used for statistics and such. */ RTDECL(int) RTUtf16ReallocTag(PRTUTF16 *ppwsz, size_t cbNew, const char *pszTag); /** * Free a UTF-16 string allocated by RTStrToUtf16(), RTStrToUtf16Ex(), * RTLatin1ToUtf16(), RTLatin1ToUtf16Ex(), RTUtf16Dup() or RTUtf16DupEx(). * * @returns iprt status code. * @param pwszString The UTF-16 string to free. NULL is accepted. */ RTDECL(void) RTUtf16Free(PRTUTF16 pwszString); /** * Allocates a new copy of the specified UTF-16 string (default tag). * * @returns Pointer to the allocated string copy. Use RTUtf16Free() to free it. * @returns NULL when out of memory. * @param pwszString UTF-16 string to duplicate. * @remark This function will not make any attempt to validate the encoding. */ #define RTUtf16Dup(pwszString) RTUtf16DupTag((pwszString), RTSTR_TAG) /** * Allocates a new copy of the specified UTF-16 string (custom tag). * * @returns Pointer to the allocated string copy. Use RTUtf16Free() to free it. * @returns NULL when out of memory. * @param pwszString UTF-16 string to duplicate. * @param pszTag Allocation tag used for statistics and such. * @remark This function will not make any attempt to validate the encoding. */ RTDECL(PRTUTF16) RTUtf16DupTag(PCRTUTF16 pwszString, const char *pszTag); /** * Allocates a new copy of the specified UTF-16 string (default tag). * * @returns iprt status code. * @param ppwszString Receives pointer of the allocated UTF-16 string. * The returned pointer must be freed using RTUtf16Free(). * @param pwszString UTF-16 string to duplicate. * @param cwcExtra Number of extra RTUTF16 items to allocate. * @remark This function will not make any attempt to validate the encoding. */ #define RTUtf16DupEx(ppwszString, pwszString, cwcExtra) \ RTUtf16DupExTag((ppwszString), (pwszString), (cwcExtra), RTSTR_TAG) /** * Allocates a new copy of the specified UTF-16 string (custom tag). * * @returns iprt status code. * @param ppwszString Receives pointer of the allocated UTF-16 string. * The returned pointer must be freed using RTUtf16Free(). * @param pwszString UTF-16 string to duplicate. * @param cwcExtra Number of extra RTUTF16 items to allocate. * @param pszTag Allocation tag used for statistics and such. * @remark This function will not make any attempt to validate the encoding. */ RTDECL(int) RTUtf16DupExTag(PRTUTF16 *ppwszString, PCRTUTF16 pwszString, size_t cwcExtra, const char *pszTag); /** * Returns the length of a UTF-16 string in UTF-16 characters * without trailing '\\0'. * * Surrogate pairs counts as two UTF-16 characters here. Use RTUtf16CpCnt() * to get the exact number of code points in the string. * * @returns The number of RTUTF16 items in the string. * @param pwszString Pointer the UTF-16 string. * @remark This function will not make any attempt to validate the encoding. */ RTDECL(size_t) RTUtf16Len(PCRTUTF16 pwszString); /** * Find the length of a zero-terminated byte string, given a max string length. * * @returns The string length or cbMax. The returned length does not include * the zero terminator if it was found. * * @param pwszString The string. * @param cwcMax The max string length in RTUTF16s. * @sa RTUtf16NLenEx, RTStrNLen. */ RTDECL(size_t) RTUtf16NLen(PCRTUTF16 pwszString, size_t cwcMax); /** * Find the length of a zero-terminated byte string, given * a max string length. * * @returns IPRT status code. * @retval VINF_SUCCESS if the string has a length less than cchMax. * @retval VERR_BUFFER_OVERFLOW if the end of the string wasn't found * before cwcMax was reached. * * @param pwszString The string. * @param cwcMax The max string length in RTUTF16s. * @param pcwc Where to store the string length excluding the * terminator. This is set to cwcMax if the terminator * isn't found. * @sa RTUtf16NLen, RTStrNLenEx. */ RTDECL(int) RTUtf16NLenEx(PCRTUTF16 pwszString, size_t cwcMax, size_t *pcwc); /** * Find the zero terminator in a string with a limited length. * * @returns Pointer to the zero terminator. * @returns NULL if the zero terminator was not found. * * @param pwszString The string. * @param cwcMax The max string length. RTSTR_MAX is fine. */ RTDECL(PCRTUTF16) RTUtf16End(PCRTUTF16 pwszString, size_t cwcMax); /** * Strips blankspaces from both ends of the string. * * @returns Pointer to first non-blank char in the string. * @param pwsz The string to strip. */ RTDECL(PRTUTF16) RTUtf16Strip(PRTUTF16 pwsz); /** * Strips blankspaces from the start of the string. * * @returns Pointer to first non-blank char in the string. * @param pwsz The string to strip. */ RTDECL(PRTUTF16) RTUtf16StripL(PCRTUTF16 pwsz); /** * Strips blankspaces from the end of the string. * * @returns pwsz. * @param pwsz The string to strip. */ RTDECL(PRTUTF16) RTUtf16StripR(PRTUTF16 pwsz); /** * String copy with overflow handling. * * @retval VINF_SUCCESS on success. * @retval VERR_BUFFER_OVERFLOW if the destination buffer is too small. The * buffer will contain as much of the string as it can hold, fully * terminated. * * @param pwszDst The destination buffer. * @param cwcDst The size of the destination buffer in RTUTF16s. * @param pwszSrc The source string. NULL is not OK. */ RTDECL(int) RTUtf16Copy(PRTUTF16 pwszDst, size_t cwcDst, PCRTUTF16 pwszSrc); /** * String copy with overflow handling, ASCII source. * * @retval VINF_SUCCESS on success. * @retval VERR_BUFFER_OVERFLOW if the destination buffer is too small. The * buffer will contain as much of the string as it can hold, fully * terminated. * * @param pwszDst The destination buffer. * @param cwcDst The size of the destination buffer in RTUTF16s. * @param pszSrc The source string, pure ASCII. NULL is not OK. */ RTDECL(int) RTUtf16CopyAscii(PRTUTF16 pwszDst, size_t cwcDst, const char *pszSrc); /** * String copy with overflow handling. * * @retval VINF_SUCCESS on success. * @retval VERR_BUFFER_OVERFLOW if the destination buffer is too small. The * buffer will contain as much of the string as it can hold, fully * terminated. * * @param pwszDst The destination buffer. * @param cwcDst The size of the destination buffer in RTUTF16s. * @param pwszSrc The source string. NULL is not OK. * @param cwcSrcMax The maximum number of chars (not code points) to * copy from the source string, not counting the * terminator as usual. */ RTDECL(int) RTUtf16CopyEx(PRTUTF16 pwszDst, size_t cwcDst, PCRTUTF16 pwszSrc, size_t cwcSrcMax); /** * String concatenation with overflow handling. * * @retval VINF_SUCCESS on success. * @retval VERR_BUFFER_OVERFLOW if the destination buffer is too small. The * buffer will contain as much of the string as it can hold, fully * terminated. * * @param pwszDst The destination buffer. * @param cwcDst The size of the destination buffer in RTUTF16s. * @param pwszSrc The source string. NULL is not OK. */ RTDECL(int) RTUtf16Cat(PRTUTF16 pwszDst, size_t cwcDst, PCRTUTF16 pwszSrc); /** * String concatenation with overflow handling, ASCII source. * * @retval VINF_SUCCESS on success. * @retval VERR_BUFFER_OVERFLOW if the destination buffer is too small. The * buffer will contain as much of the string as it can hold, fully * terminated. * * @param pwszDst The destination buffer. * @param cwcDst The size of the destination buffer in RTUTF16s. * @param pszSrc The source string, pure ASCII. NULL is not OK. */ RTDECL(int) RTUtf16CatAscii(PRTUTF16 pwszDst, size_t cwcDst, const char *pszSrc); /** * String concatenation with overflow handling. * * @retval VINF_SUCCESS on success. * @retval VERR_BUFFER_OVERFLOW if the destination buffer is too small. The * buffer will contain as much of the string as it can hold, fully * terminated. * * @param pwszDst The destination buffer. * @param cwcDst The size of the destination buffer in RTUTF16s. * @param pwszSrc The source string. NULL is not OK. * @param cwcSrcMax The maximum number of UTF-16 chars (not code * points) to copy from the source string, not * counting the terminator as usual. */ RTDECL(int) RTUtf16CatEx(PRTUTF16 pwszDst, size_t cwcDst, PCRTUTF16 pwszSrc, size_t cwcSrcMax); /** * Performs a case sensitive string compare between two UTF-16 strings. * * @returns < 0 if the first string less than the second string.s * @returns 0 if the first string identical to the second string. * @returns > 0 if the first string greater than the second string. * @param pwsz1 First UTF-16 string. Null is allowed. * @param pwsz2 Second UTF-16 string. Null is allowed. * @remark This function will not make any attempt to validate the encoding. */ RTDECL(int) RTUtf16Cmp(PCRTUTF16 pwsz1, PCRTUTF16 pwsz2); /** * Performs a case sensitive string compare between an UTF-16 string and a pure * ASCII string. * * @returns < 0 if the first string less than the second string.s * @returns 0 if the first string identical to the second string. * @returns > 0 if the first string greater than the second string. * @param pwsz1 First UTF-16 string. Null is allowed. * @param psz2 Second string, pure ASCII. Null is allowed. * @remark This function will not make any attempt to validate the encoding. */ RTDECL(int) RTUtf16CmpAscii(PCRTUTF16 pwsz1, const char *psz2); /** * Performs a case sensitive string compare between an UTF-16 string and a UTF-8 * string. * * @returns < 0 if the first string less than the second string.s * @returns 0 if the first string identical to the second string. * @returns > 0 if the first string greater than the second string. * @param pwsz1 First UTF-16 string. Null is allowed. * @param psz2 Second string, UTF-8. Null is allowed. * @remarks NULL and empty strings are treated equally. */ RTDECL(int) RTUtf16CmpUtf8(PCRTUTF16 pwsz1, const char *psz2); /** * Performs a case insensitive string compare between two UTF-16 strings. * * This is a simplified compare, as only the simplified lower/upper case folding * specified by the unicode specs are used. It does not consider character pairs * as they are used in some languages, just simple upper & lower case compares. * * @returns < 0 if the first string less than the second string. * @returns 0 if the first string identical to the second string. * @returns > 0 if the first string greater than the second string. * @param pwsz1 First UTF-16 string. Null is allowed. * @param pwsz2 Second UTF-16 string. Null is allowed. */ RTDECL(int) RTUtf16ICmp(PCRTUTF16 pwsz1, PCRTUTF16 pwsz2); /** * Performs a case insensitive string compare between an UTF-16 string and a * UTF-8 string. * * @returns < 0 if the first string less than the second string.s * @returns 0 if the first string identical to the second string. * @returns > 0 if the first string greater than the second string. * @param pwsz1 First UTF-16 string. Null is allowed. * @param psz2 Second string, UTF-8. Null is allowed. * @remarks NULL and empty strings are treated equally. */ RTDECL(int) RTUtf16ICmpUtf8(PCRTUTF16 pwsz1, const char *psz2); /** * Performs a case insensitive string compare between an UTF-16 string and an * pure ASCII string. * * Since this compare only takes cares about the first 128 codepoints in * unicode, no tables are needed and there aren't any real complications. * * @returns < 0 if the first string less than the second string. * @returns 0 if the first string identical to the second string. * @returns > 0 if the first string greater than the second string. * @param pwsz1 First UTF-16 string. Null is allowed. * @param psz2 Second string, pure ASCII. Null is allowed. */ RTDECL(int) RTUtf16ICmpAscii(PCRTUTF16 pwsz1, const char *psz2); /** * Performs a case insensitive string compare between two UTF-16 strings * using the current locale of the process (if applicable). * * This differs from RTUtf16ICmp() in that it will try, if a locale with the * required data is available, to do a correct case-insensitive compare. It * follows that it is more complex and thereby likely to be more expensive. * * @returns < 0 if the first string less than the second string. * @returns 0 if the first string identical to the second string. * @returns > 0 if the first string greater than the second string. * @param pwsz1 First UTF-16 string. Null is allowed. * @param pwsz2 Second UTF-16 string. Null is allowed. */ RTDECL(int) RTUtf16LocaleICmp(PCRTUTF16 pwsz1, PCRTUTF16 pwsz2); /** * Folds a UTF-16 string to lowercase. * * This is a very simple folding; is uses the simple lowercase * code point, it is not related to any locale just the most common * lowercase codepoint setup by the unicode specs, and it will not * create new surrogate pairs or remove existing ones. * * @returns Pointer to the passed in string. * @param pwsz The string to fold. */ RTDECL(PRTUTF16) RTUtf16ToLower(PRTUTF16 pwsz); /** * Folds a UTF-16 string to uppercase. * * This is a very simple folding; is uses the simple uppercase * code point, it is not related to any locale just the most common * uppercase codepoint setup by the unicode specs, and it will not * create new surrogate pairs or remove existing ones. * * @returns Pointer to the passed in string. * @param pwsz The string to fold. */ RTDECL(PRTUTF16) RTUtf16ToUpper(PRTUTF16 pwsz); /** * Validates the UTF-16 encoding of the string. * * @returns iprt status code. * @param pwsz The string. */ RTDECL(int) RTUtf16ValidateEncoding(PCRTUTF16 pwsz); /** * Validates the UTF-16 encoding of the string. * * @returns iprt status code. * @param pwsz The string. * @param cwc The max string length (/ size) in UTF-16 units. Use * RTSTR_MAX to process the entire string. * @param fFlags Combination of RTSTR_VALIDATE_ENCODING_XXX flags. */ RTDECL(int) RTUtf16ValidateEncodingEx(PCRTUTF16 pwsz, size_t cwc, uint32_t fFlags); /** * Checks if the UTF-16 encoding is valid. * * @returns true / false. * @param pwsz The string. */ RTDECL(bool) RTUtf16IsValidEncoding(PCRTUTF16 pwsz); /** * Sanitise a (valid) UTF-16 string by replacing all characters outside a white * list in-place by an ASCII replacement character. * * Surrogate paris will be replaced by two chars. * * @returns The number of code points replaced. In the case of an incorrectly * encoded string -1 will be returned, and the string is not completely * processed. In the case of puszValidPairs having an odd number of * code points, -1 will be also return but without any modification to * the string. * @param pwsz The string to sanitise. * @param puszValidPairs A zero-terminated array of pairs of Unicode points. * Each pair is the start and end point of a range, * and the union of these ranges forms the white list. * @param chReplacement The ASCII replacement character. * @sa RTStrPurgeComplementSet */ RTDECL(ssize_t) RTUtf16PurgeComplementSet(PRTUTF16 pwsz, PCRTUNICP puszValidPairs, char chReplacement); /** * Translate a UTF-16 string into a UTF-8 allocating the result buffer (default * tag). * * @returns iprt status code. * @param pwszString UTF-16 string to convert. * @param ppszString Receives pointer of allocated UTF-8 string on * success, and is always set to NULL on failure. * The returned pointer must be freed using RTStrFree(). */ #define RTUtf16ToUtf8(pwszString, ppszString) RTUtf16ToUtf8Tag((pwszString), (ppszString), RTSTR_TAG) /** * Translate a UTF-16 string into a UTF-8 allocating the result buffer. * * @returns iprt status code. * @param pwszString UTF-16 string to convert. * @param ppszString Receives pointer of allocated UTF-8 string on * success, and is always set to NULL on failure. * The returned pointer must be freed using RTStrFree(). * @param pszTag Allocation tag used for statistics and such. */ RTDECL(int) RTUtf16ToUtf8Tag(PCRTUTF16 pwszString, char **ppszString, const char *pszTag); /** * Translates UTF-16 to UTF-8 using buffer provided by the caller or a fittingly * sized buffer allocated by the function (default tag). * * @returns iprt status code. * @param pwszString The UTF-16 string to convert. * @param cwcString The number of RTUTF16 items to translate from pwszString. * The translation will stop when reaching cwcString or the terminator ('\\0'). * Use RTSTR_MAX to translate the entire string. * @param ppsz If cch is non-zero, this must either be pointing to a pointer to * a buffer of the specified size, or pointer to a NULL pointer. * If *ppsz is NULL or cch is zero a buffer of at least cch chars * will be allocated to hold the translated string. * If a buffer was requested it must be freed using RTStrFree(). * @param cch The buffer size in chars (the type). This includes the terminator. * @param pcch Where to store the length of the translated string, * excluding the terminator. (Optional) * * This may be set under some error conditions, * however, only for VERR_BUFFER_OVERFLOW and * VERR_NO_STR_MEMORY will it contain a valid string * length that can be used to resize the buffer. */ #define RTUtf16ToUtf8Ex(pwszString, cwcString, ppsz, cch, pcch) \ RTUtf16ToUtf8ExTag((pwszString), (cwcString), (ppsz), (cch), (pcch), RTSTR_TAG) /** * Translates UTF-16 to UTF-8 using buffer provided by the caller or a fittingly * sized buffer allocated by the function (custom tag). * * @returns iprt status code. * @param pwszString The UTF-16 string to convert. * @param cwcString The number of RTUTF16 items to translate from pwszString. * The translation will stop when reaching cwcString or the terminator ('\\0'). * Use RTSTR_MAX to translate the entire string. * @param ppsz If cch is non-zero, this must either be pointing to a pointer to * a buffer of the specified size, or pointer to a NULL pointer. * If *ppsz is NULL or cch is zero a buffer of at least cch chars * will be allocated to hold the translated string. * If a buffer was requested it must be freed using RTStrFree(). * @param cch The buffer size in chars (the type). This includes the terminator. * @param pcch Where to store the length of the translated string, * excluding the terminator. (Optional) * * This may be set under some error conditions, * however, only for VERR_BUFFER_OVERFLOW and * VERR_NO_STR_MEMORY will it contain a valid string * length that can be used to resize the buffer. * @param pszTag Allocation tag used for statistics and such. */ RTDECL(int) RTUtf16ToUtf8ExTag(PCRTUTF16 pwszString, size_t cwcString, char **ppsz, size_t cch, size_t *pcch, const char *pszTag); /** * Calculates the length of the UTF-16 string in UTF-8 chars (bytes). * * This function will validate the string, and incorrectly encoded UTF-16 * strings will be rejected. The primary purpose of this function is to * help allocate buffers for RTUtf16ToUtf8() of the correct size. For most * other purposes RTUtf16ToUtf8Ex() should be used. * * @returns Number of char (bytes). * @returns 0 if the string was incorrectly encoded. * @param pwsz The UTF-16 string. */ RTDECL(size_t) RTUtf16CalcUtf8Len(PCRTUTF16 pwsz); /** * Calculates the length of the UTF-16 string in UTF-8 chars (bytes). * * This function will validate the string, and incorrectly encoded UTF-16 * strings will be rejected. * * @returns iprt status code. * @param pwsz The string. * @param cwc The max string length. Use RTSTR_MAX to process the entire string. * @param pcch Where to store the string length (in bytes). Optional. * This is undefined on failure. */ RTDECL(int) RTUtf16CalcUtf8LenEx(PCRTUTF16 pwsz, size_t cwc, size_t *pcch); /** * Translate a UTF-16 string into a Latin-1 (ISO-8859-1) allocating the result * buffer (default tag). * * @returns iprt status code. * @param pwszString UTF-16 string to convert. * @param ppszString Receives pointer of allocated Latin1 string on * success, and is always set to NULL on failure. * The returned pointer must be freed using RTStrFree(). */ #define RTUtf16ToLatin1(pwszString, ppszString) RTUtf16ToLatin1Tag((pwszString), (ppszString), RTSTR_TAG) /** * Translate a UTF-16 string into a Latin-1 (ISO-8859-1) allocating the result * buffer (custom tag). * * @returns iprt status code. * @param pwszString UTF-16 string to convert. * @param ppszString Receives pointer of allocated Latin1 string on * success, and is always set to NULL on failure. * The returned pointer must be freed using RTStrFree(). * @param pszTag Allocation tag used for statistics and such. */ RTDECL(int) RTUtf16ToLatin1Tag(PCRTUTF16 pwszString, char **ppszString, const char *pszTag); /** * Translates UTF-16 to Latin-1 (ISO-8859-1) using buffer provided by the caller * or a fittingly sized buffer allocated by the function (default tag). * * @returns iprt status code. * @param pwszString The UTF-16 string to convert. * @param cwcString The number of RTUTF16 items to translate from * pwszString. The translation will stop when reaching * cwcString or the terminator ('\\0'). Use RTSTR_MAX * to translate the entire string. * @param ppsz Pointer to the pointer to the Latin-1 string. The * buffer can optionally be preallocated by the caller. * * If cch is zero, *ppsz is undefined. * * If cch is non-zero and *ppsz is not NULL, then this * will be used as the output buffer. * VERR_BUFFER_OVERFLOW will be returned if this is * insufficient. * * If cch is zero or *ppsz is NULL, then a buffer of * sufficient size is allocated. cch can be used to * specify a minimum size of this buffer. Use * RTUtf16Free() to free the result. * * @param cch The buffer size in chars (the type). This includes * the terminator. * @param pcch Where to store the length of the translated string, * excluding the terminator. (Optional) * * This may be set under some error conditions, * however, only for VERR_BUFFER_OVERFLOW and * VERR_NO_STR_MEMORY will it contain a valid string * length that can be used to resize the buffer. */ #define RTUtf16ToLatin1Ex(pwszString, cwcString, ppsz, cch, pcch) \ RTUtf16ToLatin1ExTag((pwszString), (cwcString), (ppsz), (cch), (pcch), RTSTR_TAG) /** * Translates UTF-16 to Latin-1 (ISO-8859-1) using buffer provided by the caller * or a fittingly sized buffer allocated by the function (custom tag). * * @returns iprt status code. * @param pwszString The UTF-16 string to convert. * @param cwcString The number of RTUTF16 items to translate from * pwszString. The translation will stop when reaching * cwcString or the terminator ('\\0'). Use RTSTR_MAX * to translate the entire string. * @param ppsz Pointer to the pointer to the Latin-1 string. The * buffer can optionally be preallocated by the caller. * * If cch is zero, *ppsz is undefined. * * If cch is non-zero and *ppsz is not NULL, then this * will be used as the output buffer. * VERR_BUFFER_OVERFLOW will be returned if this is * insufficient. * * If cch is zero or *ppsz is NULL, then a buffer of * sufficient size is allocated. cch can be used to * specify a minimum size of this buffer. Use * RTUtf16Free() to free the result. * * @param cch The buffer size in chars (the type). This includes * the terminator. * @param pcch Where to store the length of the translated string, * excluding the terminator. (Optional) * * This may be set under some error conditions, * however, only for VERR_BUFFER_OVERFLOW and * VERR_NO_STR_MEMORY will it contain a valid string * length that can be used to resize the buffer. * @param pszTag Allocation tag used for statistics and such. */ RTDECL(int) RTUtf16ToLatin1ExTag(PCRTUTF16 pwszString, size_t cwcString, char **ppsz, size_t cch, size_t *pcch, const char *pszTag); /** * Calculates the length of the UTF-16 string in Latin-1 (ISO-8859-1) chars. * * This function will validate the string, and incorrectly encoded UTF-16 * strings will be rejected. The primary purpose of this function is to * help allocate buffers for RTUtf16ToLatin1() of the correct size. For most * other purposes RTUtf16ToLatin1Ex() should be used. * * @returns Number of char (bytes). * @returns 0 if the string was incorrectly encoded. * @param pwsz The UTF-16 string. */ RTDECL(size_t) RTUtf16CalcLatin1Len(PCRTUTF16 pwsz); /** * Calculates the length of the UTF-16 string in Latin-1 (ISO-8859-1) chars. * * This function will validate the string, and incorrectly encoded UTF-16 * strings will be rejected. * * @returns iprt status code. * @param pwsz The string. * @param cwc The max string length. Use RTSTR_MAX to process the * entire string. * @param pcch Where to store the string length (in bytes). Optional. * This is undefined on failure. */ RTDECL(int) RTUtf16CalcLatin1LenEx(PCRTUTF16 pwsz, size_t cwc, size_t *pcch); /** * Get the unicode code point at the given string position. * * @returns unicode code point. * @returns RTUNICP_INVALID if the encoding is invalid. * @param pwsz The string. * * @remark This is an internal worker for RTUtf16GetCp(). */ RTDECL(RTUNICP) RTUtf16GetCpInternal(PCRTUTF16 pwsz); /** * Get the unicode code point at the given string position. * * @returns iprt status code. * @param ppwsz Pointer to the string pointer. This will be updated to * point to the char following the current code point. * @param pCp Where to store the code point. * RTUNICP_INVALID is stored here on failure. * * @remark This is an internal worker for RTUtf16GetCpEx(). */ RTDECL(int) RTUtf16GetCpExInternal(PCRTUTF16 *ppwsz, PRTUNICP pCp); /** * Put the unicode code point at the given string position * and return the pointer to the char following it. * * This function will not consider anything at or following the * buffer area pointed to by pwsz. It is therefore not suitable for * inserting code points into a string, only appending/overwriting. * * @returns pointer to the char following the written code point. * @param pwsz The string. * @param CodePoint The code point to write. * This should not be RTUNICP_INVALID or any other * character out of the UTF-16 range. * * @remark This is an internal worker for RTUtf16GetCpEx(). */ RTDECL(PRTUTF16) RTUtf16PutCpInternal(PRTUTF16 pwsz, RTUNICP CodePoint); /** * Get the unicode code point at the given string position. * * @returns unicode code point. * @returns RTUNICP_INVALID if the encoding is invalid. * @param pwsz The string. * * @remark We optimize this operation by using an inline function for * everything which isn't a surrogate pair or an endian indicator. */ DECLINLINE(RTUNICP) RTUtf16GetCp(PCRTUTF16 pwsz) { const RTUTF16 wc = *pwsz; if (wc < 0xd800 || (wc > 0xdfff && wc < 0xfffe)) return wc; return RTUtf16GetCpInternal(pwsz); } /** * Get the unicode code point at the given string position. * * @returns iprt status code. * @param ppwsz Pointer to the string pointer. This will be updated to * point to the char following the current code point. * @param pCp Where to store the code point. * RTUNICP_INVALID is stored here on failure. * * @remark We optimize this operation by using an inline function for * everything which isn't a surrogate pair or and endian indicator. */ DECLINLINE(int) RTUtf16GetCpEx(PCRTUTF16 *ppwsz, PRTUNICP pCp) { const RTUTF16 wc = **ppwsz; if (wc < 0xd800 || (wc > 0xdfff && wc < 0xfffe)) { (*ppwsz)++; *pCp = wc; return VINF_SUCCESS; } return RTUtf16GetCpExInternal(ppwsz, pCp); } /** * Put the unicode code point at the given string position * and return the pointer to the char following it. * * This function will not consider anything at or following the * buffer area pointed to by pwsz. It is therefore not suitable for * inserting code points into a string, only appending/overwriting. * * @returns pointer to the char following the written code point. * @param pwsz The string. * @param CodePoint The code point to write. * This should not be RTUNICP_INVALID or any other * character out of the UTF-16 range. * * @remark We optimize this operation by using an inline function for * everything which isn't a surrogate pair or and endian indicator. */ DECLINLINE(PRTUTF16) RTUtf16PutCp(PRTUTF16 pwsz, RTUNICP CodePoint) { if (CodePoint < 0xd800 || (CodePoint > 0xd800 && CodePoint < 0xfffe)) { *pwsz++ = (RTUTF16)CodePoint; return pwsz; } return RTUtf16PutCpInternal(pwsz, CodePoint); } /** * Skips ahead, past the current code point. * * @returns Pointer to the char after the current code point. * @param pwsz Pointer to the current code point. * @remark This will not move the next valid code point, only past the current one. */ DECLINLINE(PRTUTF16) RTUtf16NextCp(PCRTUTF16 pwsz) { RTUNICP Cp; RTUtf16GetCpEx(&pwsz, &Cp); return (PRTUTF16)pwsz; } /** * Skips backwards, to the previous code point. * * @returns Pointer to the char after the current code point. * @param pwszStart Pointer to the start of the string. * @param pwsz Pointer to the current code point. */ RTDECL(PRTUTF16) RTUtf16PrevCp(PCRTUTF16 pwszStart, PCRTUTF16 pwsz); /** * Checks if the UTF-16 char is the high surrogate char (i.e. * the 1st char in the pair). * * @returns true if it is. * @returns false if it isn't. * @param wc The character to investigate. */ DECLINLINE(bool) RTUtf16IsHighSurrogate(RTUTF16 wc) { return wc >= 0xd800 && wc <= 0xdbff; } /** * Checks if the UTF-16 char is the low surrogate char (i.e. * the 2nd char in the pair). * * @returns true if it is. * @returns false if it isn't. * @param wc The character to investigate. */ DECLINLINE(bool) RTUtf16IsLowSurrogate(RTUTF16 wc) { return wc >= 0xdc00 && wc <= 0xdfff; } /** * Checks if the two UTF-16 chars form a valid surrogate pair. * * @returns true if they do. * @returns false if they doesn't. * @param wcHigh The high (1st) character. * @param wcLow The low (2nd) character. */ DECLINLINE(bool) RTUtf16IsSurrogatePair(RTUTF16 wcHigh, RTUTF16 wcLow) { return RTUtf16IsHighSurrogate(wcHigh) && RTUtf16IsLowSurrogate(wcLow); } /** * Formats a buffer stream as hex bytes. * * The default is no separating spaces or line breaks or anything. * * @returns IPRT status code. * @retval VERR_INVALID_POINTER if any of the pointers are wrong. * @retval VERR_BUFFER_OVERFLOW if the buffer is insufficent to hold the bytes. * * @param pwszBuf Output string buffer. * @param cwcBuf The size of the output buffer in RTUTF16 units. * @param pv Pointer to the bytes to stringify. * @param cb The number of bytes to stringify. * @param fFlags Combination of RTSTRPRINTHEXBYTES_F_XXX values. * @sa RTStrPrintHexBytes. */ RTDECL(int) RTUtf16PrintHexBytes(PRTUTF16 pwszBuf, size_t cwcBuf, void const *pv, size_t cb, uint32_t fFlags); /** @} */ RT_C_DECLS_END /** @} */ #endif