string.h revision e4598941c38029d9ab7a390de1f6fc125c44c79e
/** @file
* innotek Portable Runtime - String Manipluation.
*/
/*
* Copyright (C) 2006-2007 innotek GmbH
*
* 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 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.
*/
#ifndef ___iprt_string_h
#define ___iprt_string_h
#include <iprt/cdefs.h>
#include <iprt/types.h>
#include <iprt/stdarg.h>
#include <iprt/err.h> /* for VINF_SUCCESS */
#if defined(RT_OS_LINUX) && defined(__KERNEL__)
# include <linux/string.h>
#elif defined(RT_OS_FREEBSD) && defined(_KERNEL)
/*
* Kludge for the FreeBSD kernel:
* Some of the string.h stuff clashes with sys/libkern.h, so just wrap
* it up while including string.h to keep things quiet. It's nothing
* important that's clashing, after all.
*/
# define strdup strdup_string_h
# include <string.h>
# undef strdup
#elif defined(RT_OS_SOLARIS) && defined(_KERNEL)
/*
* Same case as with FreeBSD kernel:
* The string.h stuff clashes with sys/systm.h
* ffs = find first set bit.
*/
# define ffs ffs_string_h
# include <string.h>
# undef ffs
# undef strpbrk
#else
# include <string.h>
#endif
/*
* Supply prototypes for standard string functions provided by
* IPRT instead of the operating environment.
*/
#if defined(RT_OS_DARWIN) && defined(KERNEL)
__BEGIN_DECLS
void *memchr(const void *pv, int ch, size_t cb);
char *strpbrk(const char *pszStr, const char *pszChars);
__END_DECLS
#endif
/** @defgroup grp_rt_str RTStr - String Manipulation
* Mostly UTF-8 related helpers where the standard string functions won't do.
* @ingroup grp_rt
* @{
*/
__BEGIN_DECLS
/**
* The maximum string length.
*/
#define RTSTR_MAX (~(size_t)0)
#ifdef IN_RING3
/**
* Allocates tmp buffer, translates pszString from UTF8 to current codepage.
*
* @returns iprt status code.
* @param ppszString Receives pointer of allocated native CP string.
* The returned pointer must be freed using RTStrFree().
* @param pszString UTF-8 string to convert.
*/
RTR3DECL(int) RTStrUtf8ToCurrentCP(char **ppszString, const char *pszString);
/**
* Allocates tmp buffer, translates pszString from current codepage to UTF-8.
*
* @returns iprt status code.
* @param ppszString Receives pointer of allocated UTF-8 string.
* The returned pointer must be freed using RTStrFree().
* @param pszString Native string to convert.
*/
RTR3DECL(int) RTStrCurrentCPToUtf8(char **ppszString, const char *pszString);
#endif
/**
* Free string allocated by any of the non-UCS-2 string functions.
*
* @returns iprt status code.
* @param pszString Pointer to buffer with string to free.
* NULL is accepted.
*/
RTDECL(void) RTStrFree(char *pszString);
/**
* Allocates a new copy of the given UTF-8 string.
*
* @returns Pointer to the allocated UTF-8 string.
* @param pszString UTF-8 string to duplicate.
*/
RTDECL(char *) RTStrDup(const char *pszString);
/**
* Allocates a new copy of the given UTF-8 string.
*
* @returns iprt status code.
* @param ppszString Receives pointer of the allocated UTF-8 string.
* The returned pointer must be freed using RTStrFree().
* @param pszString UTF-8 string to duplicate.
*/
RTDECL(int) RTStrDupEx(char **ppszString, const char *pszString);
/**
* Gets the number of code points the string is made up of, excluding
* the terminator.
*
*
* @returns Number of code points (RTUNICP).
* @returns 0 if the string was incorrectly encoded.
* @param psz The string.
*/
RTDECL(size_t) RTStrUniLen(const char *psz);
/**
* Gets the number of code points the string is made up of, excluding
* the terminator.
*
* This function will validate the string, and incorrectly encoded UTF-8
* strings will be rejected.
*
* @returns iprt status code.
* @param psz The string.
* @param cch The max string length. Use RTSTR_MAX to process the entire string.
* @param pcuc Where to store the code point count.
* This is undefined on failure.
*/
RTDECL(int) RTStrUniLenEx(const char *psz, size_t cch, size_t *pcuc);
/**
* Translate a UTF-8 string into an unicode string (i.e. RTUNICPs), allocating the string buffer.
*
* @returns iprt status code.
* @param pszString UTF-8 string to convert.
* @param ppUniString Receives pointer to the allocated unicode string.
* The returned string must be freed using RTUniFree().
*/
RTDECL(int) RTStrToUni(const char *pszString, PRTUNICP *ppUniString);
/**
* Translates pszString from UTF-8 to an array of code points, allocating the result
* array if requested.
*
* @returns iprt status code.
* @param pszString UTF-8 string to convert.
* @param cchString The maximum size in chars (the type) to convert. The conversion stop
* when it reaches cchString or the string terminator ('\\0').
* Use RTSTR_MAX to translate the entire string.
* @param ppaCps If cCps is non-zero, this must either be pointing to pointer to
* a buffer of the specified size, or pointer to a NULL pointer.
* If *ppusz is NULL or cCps is zero a buffer of at least cCps items
* will be allocated to hold the translated string.
* If a buffer was requirest it must be freed using RTUtf16Free().
* @param cCps The number of code points in the unicode string. This includes the terminator.
* @param pcCps Where to store the length of the translated string. (Optional)
* This field will be updated even on failure, however the value is only
* specified for the following two error codes. On VERR_BUFFER_OVERFLOW
* and VERR_NO_STR_MEMORY it contains the required buffer space.
*/
RTDECL(int) RTStrToUniEx(const char *pszString, size_t cchString, PRTUNICP *ppaCps, size_t cCps, size_t *pcCps);
/**
* Calculates the length of the string in RTUTF16 items.
*
* This function will validate the string, and incorrectly encoded UTF-8
* strings will be rejected. The primary purpose of this function is to
* help allocate buffers for RTStrToUtf16Ex of the correct size. For most
* other puroses RTStrCalcUtf16LenEx() should be used.
*
* @returns Number of RTUTF16 items.
* @returns 0 if the string was incorrectly encoded.
* @param psz The string.
*/
RTDECL(size_t) RTStrCalcUtf16Len(const char *psz);
/**
* Calculates the length of the string in RTUTF16 items.
*
* This function will validate the string, and incorrectly encoded UTF-8
* strings will be rejected.
*
* @returns iprt status code.
* @param psz The string.
* @param cch The max string length. Use RTSTR_MAX to process the entire string.
* @param pcwc Where to store the string length. Optional.
* This is undefined on failure.
*/
RTDECL(int) RTStrCalcUtf16LenEx(const char *psz, size_t cch, size_t *pcwc);
/**
* Translate a UTF-8 string into a UTF-16 allocating the result buffer.
*
* @returns iprt status code.
* @param pszString UTF-8 string to convert.
* @param ppwszString Receives pointer to the allocated UTF-16 string.
* The returned string must be freed using RTUtf16Free().
*/
RTDECL(int) RTStrToUtf16(const char *pszString, PRTUTF16 *ppwszString);
/**
* Translates pszString from UTF-8 to UTF-16, allocating the result buffer if requested.
*
* @returns iprt status code.
* @param pszString UTF-8 string to convert.
* @param cchString The maximum size in chars (the type) to convert. The conversion stop
* when it reaches cchString or the string terminator ('\\0').
* Use RTSTR_MAX to translate the entire string.
* @param ppwsz If cwc is non-zero, this must either be pointing to pointer to
* a buffer of the specified size, or pointer to a NULL pointer.
* If *ppwsz is NULL or cwc is zero a buffer of at least cwc items
* will be allocated to hold the translated string.
* If a buffer was requirest it must be freed using RTUtf16Free().
* @param cwc The buffer size in RTUTF16s. This includes the terminator.
* @param pcwc Where to store the length of the translated string. (Optional)
* This field will be updated even on failure, however the value is only
* specified for the following two error codes. On VERR_BUFFER_OVERFLOW
* and VERR_NO_STR_MEMORY it contains the required buffer space.
*/
RTDECL(int) RTStrToUtf16Ex(const char *pszString, size_t cchString, PRTUTF16 *ppwsz, size_t cwc, size_t *pcwc);
/**
* Allocates tmp buffer, translates pszString from UTF8 to UCS-2.
*
* @returns iprt status code.
* @param ppwszString Receives pointer of allocated UCS-2 string.
* The returned pointer must be freed using RTStrUcs2Free().
* @param pszString UTF-8 string to convert.
* @deprecated Use RTStrToUtf16().
*/
DECLINLINE(int) RTStrUtf8ToUcs2(PRTUCS2 *ppwszString, const char *pszString)
{
return RTStrToUtf16(pszString, ppwszString);
}
/**
* Translates pszString from UTF8 to backwater UCS-2, can allocate a temp buffer.
*
* @returns iprt status code.
* @param ppwszString Receives pointer of allocated UCS-2 string.
* The returned pointer must be freed using RTStrUcs2Free().
* @param cwc Length of target buffer in RTUCS2s including the trailing '\\0'.
* If 0 a temporary buffer is allocated.
* @param pszString UTF-8 string to convert.
* @deprecated Use RTStrToUtf16Ex().
*/
DECLINLINE(int) RTStrUtf8ToUcs2Ex(PRTUCS2 *ppwszString, unsigned cwc, const char *pszString)
{
return RTStrToUtf16Ex(pszString, RTSTR_MAX, ppwszString, cwc, NULL);
}
/**
* Get the unicode code point at the given string position.
*
* @returns unicode code point.
* @returns RTUNICP_INVALID if the encoding is invalid.
* @param psz The string.
*/
RTDECL(RTUNICP) RTStrGetCpInternal(const char *psz);
/**
* Get the unicode code point at the given string position.
*
* @returns unicode code point.
* @returns RTUNICP_INVALID if the encoding is invalid.
* @param ppsz The string.
* @param pCp Where to store the unicode code point.
*/
RTDECL(int) RTStrGetCpExInternal(const char **ppsz, 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 the
* buffer area pointed to by psz. 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 psz The string.
* @param CodePoint The code point to write.
* This sould not be RTUNICP_INVALID or any other charater
* out of the UTF-8 range.
*
* @remark This is a worker function for RTStrPutCp().
*
*/
RTDECL(char *) RTStrPutCpInternal(char *psz, 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 psz The string.
*
* @remark We optimize this operation by using an inline function for
* the most frequent and simplest sequence, the rest is
* handled by RTStrGetCpInternal().
*/
DECLINLINE(RTUNICP) RTStrGetCp(const char *psz)
{
const unsigned char uch = *(const unsigned char *)psz;
if (!(uch & RT_BIT(7)))
return uch;
return RTStrGetCpInternal(psz);
}
/**
* Get the unicode code point at the given string position.
*
* @returns iprt status code.
* @param ppsz 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
* the most frequent and simplest sequence, the rest is
* handled by RTStrGetCpExInternal().
*/
DECLINLINE(int) RTStrGetCpEx(const char **ppsz, PRTUNICP pCp)
{
const unsigned char uch = **(const unsigned char **)ppsz;
if (!(uch & RT_BIT(7)))
{
(*ppsz)++;
*pCp = uch;
return VINF_SUCCESS;
}
return RTStrGetCpExInternal(ppsz, 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 the
* buffer area pointed to by psz. 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 psz The string.
* @param CodePoint The code point to write.
* This sould not be RTUNICP_INVALID or any other charater
* out of the UTF-8 range.
*
* @remark We optimize this operation by using an inline function for
* the most frequent and simplest sequence, the rest is
* handled by RTStrPutCpInternal().
*/
DECLINLINE(char *) RTStrPutCp(char *psz, RTUNICP CodePoint)
{
if (CodePoint < 0x80)
{
*psz++ = (unsigned char)CodePoint;
return psz;
}
return RTStrPutCpInternal(psz, CodePoint);
}
/**
* Skips ahead, past the current code point.
*
* @returns Pointer to the char after the current code point.
* @param psz Pointer to the current code point.
* @remark This will not move the next valid code point, only past the current one.
*/
DECLINLINE(char *) RTStrNextCp(const char *psz)
{
RTUNICP Cp;
RTStrGetCpEx(&psz, &Cp);
return (char *)psz;
}
/**
* Skips back to the previous code point.
*
* @returns Pointer to the char before the current code point.
* @returns pszStart on failure.
* @param pszStart Pointer to the start of the string.
* @param psz Pointer to the current code point.
*/
RTDECL(char *) RTStrPrevCp(const char *pszStart, const char *psz);
#ifndef DECLARED_FNRTSTROUTPUT /* duplicated in iprt/log.h */
#define DECLARED_FNRTSTROUTPUT
/**
* Output callback.
*
* @returns number of bytes written.
* @param pvArg User argument.
* @param pachChars Pointer to an array of utf-8 characters.
* @param cbChars Number of bytes in the character array pointed to by pachChars.
*/
typedef DECLCALLBACK(size_t) FNRTSTROUTPUT(void *pvArg, const char *pachChars, size_t cbChars);
/** Pointer to callback function. */
typedef FNRTSTROUTPUT *PFNRTSTROUTPUT;
#endif
/** Format flag.
* These are used by RTStrFormat extensions and RTStrFormatNumber, mind
* that not all flags makes sense to both of the functions.
* @{ */
#define RTSTR_F_CAPITAL 0x0001
#define RTSTR_F_LEFT 0x0002
#define RTSTR_F_ZEROPAD 0x0004
#define RTSTR_F_SPECIAL 0x0008
#define RTSTR_F_VALSIGNED 0x0010
#define RTSTR_F_PLUS 0x0020
#define RTSTR_F_BLANK 0x0040
#define RTSTR_F_WIDTH 0x0080
#define RTSTR_F_PRECISION 0x0100
#define RTSTR_F_BIT_MASK 0xf800
#define RTSTR_F_8BIT 0x0800
#define RTSTR_F_16BIT 0x1000
#define RTSTR_F_32BIT 0x2000
#define RTSTR_F_64BIT 0x4000
#define RTSTR_F_128BIT 0x8000
/** @} */
/** @def RTSTR_GET_BIT_FLAG
* Gets the bit flag for the specified type.
*/
#define RTSTR_GET_BIT_FLAG(type) \
( sizeof(type) == 32 ? RTSTR_F_32BIT \
: sizeof(type) == 64 ? RTSTR_F_64BIT \
: sizeof(type) == 16 ? RTSTR_F_16BIT \
: sizeof(type) == 8 ? RTSTR_F_8BIT \
: sizeof(type) == 128? RTSTR_F_128BIT \
: 0)
/**
* Callback to format non-standard format specifiers.
*
* @returns The number of bytes formatted.
* @param pvArg Formatter argument.
* @param pfnOutput Pointer to output function.
* @param pvArgOutput Argument for the output function.
* @param ppszFormat Pointer to the format string pointer. Advance this till the char
* after the format specifier.
* @param pArgs Pointer to the argument list. Use this to fetch the arguments.
* @param cchWidth Format Width. -1 if not specified.
* @param cchPrecision Format Precision. -1 if not specified.
* @param fFlags Flags (RTSTR_NTFS_*).
* @param chArgSize The argument size specifier, 'l' or 'L'.
*/
typedef DECLCALLBACK(size_t) FNSTRFORMAT(void *pvArg, PFNRTSTROUTPUT pfnOutput, void *pvArgOutput,
const char **ppszFormat, va_list *pArgs, int cchWidth,
int cchPrecision, unsigned fFlags, char chArgSize);
/** Pointer to a FNSTRFORMAT() function. */
typedef FNSTRFORMAT *PFNSTRFORMAT;
/**
* Partial implementation of a printf like formatter.
* It doesn't do everything correct, and there is no floating point support.
* However, it supports custom formats by the means of a format callback.
*
* @returns number of bytes formatted.
* @param pfnOutput Output worker.
* Called in two ways. Normally with a string and its length.
* For termination, it's called with NULL for string, 0 for length.
* @param pvArgOutput Argument to the output worker.
* @param pfnFormat Custom format worker.
* @param pvArgFormat Argument to the format worker.
* @param pszFormat Format string pointer.
* @param args Argument list.
*/
RTDECL(size_t) RTStrFormatV(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput, PFNSTRFORMAT pfnFormat, void *pvArgFormat, const char *pszFormat, va_list args);
/**
* Partial implementation of a printf like formatter.
* It doesn't do everything correct, and there is no floating point support.
* However, it supports custom formats by the means of a format callback.
*
* @returns number of bytes formatted.
* @param pfnOutput Output worker.
* Called in two ways. Normally with a string and its length.
* For termination, it's called with NULL for string, 0 for length.
* @param pvArgOutput Argument to the output worker.
* @param pfnFormat Custom format worker.
* @param pvArgFormat Argument to the format worker.
* @param pszFormat Format string.
* @param ... Argument list.
*/
RTDECL(size_t) RTStrFormat(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput, PFNSTRFORMAT pfnFormat, void *pvArgFormat, const char *pszFormat, ...);
/**
* Formats an integer number according to the parameters.
*
* @returns Length of the formatted number.
* @param psz Pointer to output string buffer of sufficient size.
* @param u64Value Value to format.
* @param uiBase Number representation base.
* @param cchWidth Width.
* @param cchPrecision Precision.
* @param fFlags Flags (NTFS_*).
*/
RTDECL(int) RTStrFormatNumber(char *psz, uint64_t u64Value, unsigned int uiBase, signed int cchWidth, signed int cchPrecision, unsigned int fFlags);
/**
* String printf.
*
* @returns The length of the returned string (in pszBuffer).
* @param pszBuffer Output buffer.
* @param cchBuffer Size of the output buffer.
* @param pszFormat The format string.
* @param args The format argument.
*/
RTDECL(size_t) RTStrPrintfV(char *pszBuffer, size_t cchBuffer, const char *pszFormat, va_list args);
/**
* String printf.
*
* @returns The length of the returned string (in pszBuffer).
* @param pszBuffer Output buffer.
* @param cchBuffer Size of the output buffer.
* @param pszFormat The format string.
* @param ... The format argument.
*/
RTDECL(size_t) RTStrPrintf(char *pszBuffer, size_t cchBuffer, const char *pszFormat, ...);
/**
* String printf with custom formatting.
*
* @returns The length of the returned string (in pszBuffer).
* @param pfnFormat Pointer to handler function for the custom formats.
* @param pvArg Argument to the pfnFormat function.
* @param pszBuffer Output buffer.
* @param cchBuffer Size of the output buffer.
* @param pszFormat The format string.
* @param args The format argument.
*/
RTDECL(size_t) RTStrPrintfExV(PFNSTRFORMAT pfnFormat, void *pvArg, char *pszBuffer, size_t cchBuffer, const char *pszFormat, va_list args);
/**
* String printf with custom formatting.
*
* @returns The length of the returned string (in pszBuffer).
* @param pfnFormat Pointer to handler function for the custom formats.
* @param pvArg Argument to the pfnFormat function.
* @param pszBuffer Output buffer.
* @param cchBuffer Size of the output buffer.
* @param pszFormat The format string.
* @param ... The format argument.
*/
RTDECL(size_t) RTStrPrintfEx(PFNSTRFORMAT pfnFormat, void *pvArg, char *pszBuffer, size_t cchBuffer, const char *pszFormat, ...);
/**
* Allocating string printf.
*
* @returns The length of the string in the returned *ppszBuffer.
* @returns -1 on failure.
* @param ppszBuffer Where to store the pointer to the allocated output buffer.
* The buffer should be freed using RTStrFree().
* On failure *ppszBuffer will be set to NULL.
* @param pszFormat The format string.
* @param args The format argument.
*/
RTDECL(int) RTStrAPrintfV(char **ppszBuffer, const char *pszFormat, va_list args);
/**
* Allocating string printf.
*
* @returns The length of the string in the returned *ppszBuffer.
* @returns -1 on failure.
* @param ppszBuffer Where to store the pointer to the allocated output buffer.
* The buffer should be freed using RTStrFree().
* On failure *ppszBuffer will be set to NULL.
* @param pszFormat The format string.
* @param ... The format argument.
*/
RTDECL(int) RTStrAPrintf(char **ppszBuffer, const char *pszFormat, ...);
/**
* Strips blankspaces from both ends of the string.
*
* @returns Pointer to first non-blank char in the string.
* @param psz The string to strip.
*/
RTDECL(char *) RTStrStrip(char *psz);
/**
* Strips blankspaces from the start of the string.
*
* @returns Pointer to first non-blank char in the string.
* @param psz The string to strip.
*/
RTDECL(char *) RTStrStripL(const char *psz);
/**
* Strips blankspaces from the end of the string.
*
* @returns psz.
* @param psz The string to strip.
*/
RTDECL(char *) RTStrStripR(char *psz);
/** @defgroup rt_str_conv String To/From Number Conversions
* @ingroup grp_rt_str
* @{ */
/**
* Converts a string representation of a number to a 64-bit unsigned number.
*
* @returns iprt status code.
* Warnings are used to indicate conversion problems.
* @param pszValue Pointer to the string value.
* @param ppszNext Where to store the pointer to the first char following the number. (Optional)
* @param uBase The base of the representation used.
* If 0 the function will look for known prefixes before defaulting to 10.
* @param pu64 Where to store the converted number. (optional)
*/
RTDECL(int) RTStrToUInt64Ex(const char *pszValue, char **ppszNext, unsigned uBase, uint64_t *pu64);
/**
* Converts a string representation of a number to a 64-bit unsigned number.
* The base is guessed.
*
* @returns 64-bit unsigned number on success.
* @returns 0 on failure.
* @param pszValue Pointer to the string value.
*/
RTDECL(uint64_t) RTStrToUInt64(const char *pszValue);
/**
* Converts a string representation of a number to a 32-bit unsigned number.
*
* @returns iprt status code.
* Warnings are used to indicate conversion problems.
* @param pszValue Pointer to the string value.
* @param ppszNext Where to store the pointer to the first char following the number. (Optional)
* @param uBase The base of the representation used.
* If 0 the function will look for known prefixes before defaulting to 10.
* @param pu32 Where to store the converted number. (optional)
*/
RTDECL(int) RTStrToUInt32Ex(const char *pszValue, char **ppszNext, unsigned uBase, uint32_t *pu32);
/**
* Converts a string representation of a number to a 64-bit unsigned number.
* The base is guessed.
*
* @returns 32-bit unsigned number on success.
* @returns 0 on failure.
* @param pszValue Pointer to the string value.
*/
RTDECL(uint32_t) RTStrToUInt32(const char *pszValue);
/**
* Converts a string representation of a number to a 16-bit unsigned number.
*
* @returns iprt status code.
* Warnings are used to indicate conversion problems.
* @param pszValue Pointer to the string value.
* @param ppszNext Where to store the pointer to the first char following the number. (Optional)
* @param uBase The base of the representation used.
* If 0 the function will look for known prefixes before defaulting to 10.
* @param pu16 Where to store the converted number. (optional)
*/
RTDECL(int) RTStrToUInt16Ex(const char *pszValue, char **ppszNext, unsigned uBase, uint16_t *pu16);
/**
* Converts a string representation of a number to a 16-bit unsigned number.
* The base is guessed.
*
* @returns 16-bit unsigned number on success.
* @returns 0 on failure.
* @param pszValue Pointer to the string value.
*/
RTDECL(uint16_t) RTStrToUInt16(const char *pszValue);
/**
* Converts a string representation of a number to a 8-bit unsigned number.
*
* @returns iprt status code.
* Warnings are used to indicate conversion problems.
* @param pszValue Pointer to the string value.
* @param ppszNext Where to store the pointer to the first char following the number. (Optional)
* @param uBase The base of the representation used.
* If 0 the function will look for known prefixes before defaulting to 10.
* @param pu8 Where to store the converted number. (optional)
*/
RTDECL(int) RTStrToUInt8Ex(const char *pszValue, char **ppszNext, unsigned uBase, uint8_t *pu8);
/**
* Converts a string representation of a number to a 8-bit unsigned number.
* The base is guessed.
*
* @returns 8-bit unsigned number on success.
* @returns 0 on failure.
* @param pszValue Pointer to the string value.
*/
RTDECL(uint8_t) RTStrToUInt8(const char *pszValue);
/**
* Converts a string representation of a number to a 64-bit signed number.
*
* @returns iprt status code.
* Warnings are used to indicate conversion problems.
* @param pszValue Pointer to the string value.
* @param ppszNext Where to store the pointer to the first char following the number. (Optional)
* @param uBase The base of the representation used.
* If 0 the function will look for known prefixes before defaulting to 10.
* @param pi64 Where to store the converted number. (optional)
*/
RTDECL(int) RTStrToInt64Ex(const char *pszValue, char **ppszNext, unsigned uBase, int64_t *pi64);
/**
* Converts a string representation of a number to a 64-bit signed number.
* The base is guessed.
*
* @returns 64-bit signed number on success.
* @returns 0 on failure.
* @param pszValue Pointer to the string value.
*/
RTDECL(int64_t) RTStrToInt64(const char *pszValue);
/**
* Converts a string representation of a number to a 32-bit signed number.
*
* @returns iprt status code.
* Warnings are used to indicate conversion problems.
* @param pszValue Pointer to the string value.
* @param ppszNext Where to store the pointer to the first char following the number. (Optional)
* @param uBase The base of the representation used.
* If 0 the function will look for known prefixes before defaulting to 10.
* @param pi32 Where to store the converted number. (optional)
*/
RTDECL(int) RTStrToInt32Ex(const char *pszValue, char **ppszNext, unsigned uBase, int32_t *pi32);
/**
* Converts a string representation of a number to a 32-bit signed number.
* The base is guessed.
*
* @returns 32-bit signed number on success.
* @returns 0 on failure.
* @param pszValue Pointer to the string value.
*/
RTDECL(int32_t) RTStrToInt32(const char *pszValue);
/**
* Converts a string representation of a number to a 16-bit signed number.
*
* @returns iprt status code.
* Warnings are used to indicate conversion problems.
* @param pszValue Pointer to the string value.
* @param ppszNext Where to store the pointer to the first char following the number. (Optional)
* @param uBase The base of the representation used.
* If 0 the function will look for known prefixes before defaulting to 10.
* @param pi16 Where to store the converted number. (optional)
*/
RTDECL(int) RTStrToInt16Ex(const char *pszValue, char **ppszNext, unsigned uBase, int16_t *pi16);
/**
* Converts a string representation of a number to a 16-bit signed number.
* The base is guessed.
*
* @returns 16-bit signed number on success.
* @returns 0 on failure.
* @param pszValue Pointer to the string value.
*/
RTDECL(int16_t) RTStrToInt16(const char *pszValue);
/**
* Converts a string representation of a number to a 8-bit signed number.
*
* @returns iprt status code.
* Warnings are used to indicate conversion problems.
* @param pszValue Pointer to the string value.
* @param ppszNext Where to store the pointer to the first char following the number. (Optional)
* @param uBase The base of the representation used.
* If 0 the function will look for known prefixes before defaulting to 10.
* @param pi8 Where to store the converted number. (optional)
*/
RTDECL(int) RTStrToInt8Ex(const char *pszValue, char **ppszNext, unsigned uBase, int8_t *pi8);
/**
* Converts a string representation of a number to a 8-bit signed number.
* The base is guessed.
*
* @returns 8-bit signed number on success.
* @returns 0 on failure.
* @param pszValue Pointer to the string value.
*/
RTDECL(int8_t) RTStrToInt8(const char *pszValue);
/**
* Performs a case insensitive string compare between two UTF-8 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 psz1 First UTF-8 string.
* @param psz2 Second UTF-8 string.
*/
RTDECL(int) RTStrICmp(const char *psz1, const char *psz2);
/** @} */
/** @defgroup rt_str_space Unique String Space
* @ingroup grp_rt_str
* @{
*/
/** Pointer to a string name space container node core. */
typedef struct RTSTRSPACECORE *PRTSTRSPACECORE;
/** Pointer to a pointer to a string name space container node core. */
typedef PRTSTRSPACECORE *PPRTSTRSPACECORE;
/**
* String name space container node core.
*/
typedef struct RTSTRSPACECORE
{
/** Hash key. Don't touch. */
uint32_t Key;
/** Pointer to the left leaf node. Don't touch. */
PRTSTRSPACECORE pLeft;
/** Pointer to the left rigth node. Don't touch. */
PRTSTRSPACECORE pRight;
/** Pointer to the list of string with the same key. Don't touch. */
PRTSTRSPACECORE pList;
/** Height of this tree: max(heigth(left), heigth(right)) + 1. Don't touch */
unsigned char uchHeight;
/** The string length. Read only! */
size_t cchString;
/** Pointer to the string. Read only! */
const char * pszString;
} RTSTRSPACECORE;
/** String space. (Initialize with NULL.) */
typedef PRTSTRSPACECORE RTSTRSPACE;
/** Pointer to a string space. */
typedef PPRTSTRSPACECORE PRTSTRSPACE;
/**
* Inserts a string into a unique string space.
*
* @returns true on success.
* @returns false if the string collieded with an existing string.
* @param pStrSpace The space to insert it into.
* @param pStr The string node.
*/
RTDECL(bool) RTStrSpaceInsert(PRTSTRSPACE pStrSpace, PRTSTRSPACECORE pStr);
/**
* Removes a string from a unique string space.
*
* @returns Pointer to the removed string node.
* @returns NULL if the string was not found in the string space.
* @param pStrSpace The space to insert it into.
* @param pszString The string to remove.
*/
RTDECL(PRTSTRSPACECORE) RTStrSpaceRemove(PRTSTRSPACE pStrSpace, const char *pszString);
/**
* Gets a string from a unique string space.
*
* @returns Pointer to the string node.
* @returns NULL if the string was not found in the string space.
* @param pStrSpace The space to insert it into.
* @param pszString The string to get.
*/
RTDECL(PRTSTRSPACECORE) RTStrSpaceGet(PRTSTRSPACE pStrSpace, const char *pszString);
/**
* Callback function for RTStrSpaceEnumerate() and RTStrSpaceDestroy().
*
* @returns 0 on continue.
* @returns Non-zero to aborts the operation.
* @param pStr The string node
* @param pvUser The user specified argument.
*/
typedef DECLCALLBACK(int) FNRTSTRSPACECALLBACK(PRTSTRSPACECORE pStr, void *pvUser);
/** Pointer to callback function for RTStrSpaceEnumerate() and RTStrSpaceDestroy(). */
typedef FNRTSTRSPACECALLBACK *PFNRTSTRSPACECALLBACK;
/**
* Destroys the string space.
* The caller supplies a callback which will be called for each of
* the string nodes in for freeing their memory and other resources.
*
* @returns 0 or what ever non-zero return value pfnCallback returned
* when aborting the destruction.
* @param pStrSpace The space to insert it into.
* @param pfnCallback The callback.
* @param pvUser The user argument.
*/
RTDECL(int) RTStrSpaceDestroy(PRTSTRSPACE pStrSpace, PFNRTSTRSPACECALLBACK pfnCallback, void *pvUser);
/**
* Enumerates the string space.
* The caller supplies a callback which will be called for each of
* the string nodes.
*
* @returns 0 or what ever non-zero return value pfnCallback returned
* when aborting the destruction.
* @param pStrSpace The space to insert it into.
* @param pfnCallback The callback.
* @param pvUser The user argument.
*/
RTDECL(int) RTStrSpaceEnumerate(PRTSTRSPACE pStrSpace, PFNRTSTRSPACECALLBACK pfnCallback, void *pvUser);
/** @} */
/** @defgroup rt_str_utf16 UTF-16 String Manipulation
* @ingroup grp_rt_str
* @{
*/
/**
* Free a UTF-16 string allocated by RTStrUtf8ToUtf16(), RTStrUtf8ToUtf16Ex(),
* 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.
*
* @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.
*/
RTDECL(PRTUTF16) RTUtf16Dup(PCRTUTF16 pwszString);
/**
* Allocates a new copy of the specified UTF-16 string.
*
* @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.
*/
RTDECL(int) RTUtf16DupEx(PRTUTF16 *ppwszString, PCRTUTF16 pwszString, size_t cwcExtra);
/**
* 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);
/**
* 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.
* @param pwsz2 Second UTF-16 string.
* @remark This function will not make any attempt to validate the encoding.
*/
RTDECL(int) RTUtf16Cmp(register PCRTUTF16 pwsz1, register PCRTUTF16 pwsz2);
/**
* 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.
* @param pwsz2 Second UTF-16 string.
*/
RTDECL(int) RTUtf16ICmp(PCRTUTF16 pwsz1, PCRTUTF16 pwsz2);
/**
* 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.
* @param pwsz2 Second UTF-16 string.
*/
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);
/**
* 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.
* The returned pointer must be freed using RTStrFree().
*/
RTDECL(int) RTUtf16ToUtf8(PCRTUTF16 pwszString, char **ppszString);
/**
* Translates UTF-16 to UTF-8 using buffer provided by the caller or
* a fittingly sized buffer allocated by the function.
*
* @returns iprt status code.
* @param pwszString The UTF-16 string to convert.
* @param cwcString The number of RTUTF16 items to translation from pwszString.
* The translate 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 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 requirest it must be freed using RTUtf16Free().
* @param cch The buffer size in chars (the type). This includes the terminator.
* @param pcch Where to store the length of the translated string. (Optional)
* This field will be updated even on failure, however the value is only
* specified for the following two error codes. On VERR_BUFFER_OVERFLOW
* and VERR_NO_STR_MEMORY it contains the required buffer space.
*/
RTDECL(int) RTUtf16ToUtf8Ex(PCRTUTF16 pwszString, size_t cwcString, char **ppsz, size_t cch, size_t *pcch);
/**
* Allocates tmp buffer, translates pwszString from UCS-2 to UTF8.
*
* @returns iprt status code.
* @param ppszString Receives pointer of allocated UTF8 string.
* The returned pointer must be freed using RTStrFree().
* @param pwszString UCS-2 string to convert.
* @deprecated Use RTUtf16ToUtf8().
*/
DECLINLINE(int) RTStrUcs2ToUtf8(char **ppszString, PCRTUCS2 pwszString)
{
return RTUtf16ToUtf8(pwszString, ppszString);
}
/**
* Translates UCS-2 to UTF-8 using buffer provided by the caller or
* a fittingly sized buffer allocated by the function.
*
* @returns iprt status code.
* @param ppszString If cch is not zero, this points to the pointer to the
* buffer where the converted string shall be resulted.
* If cch is zero, this is where the pointer to the allocated
* buffer with the converted string is stored. The allocated
* buffer must be freed by using RTStrFree().
* @param cch Size of the passed in buffer (*ppszString).
* If 0 a fittingly sized buffer is allocated.
* @param pwszString UCS-2 string to convert.
* @deprecated
*/
DECLINLINE(int) RTStrUcs2ToUtf8Ex(char **ppszString, size_t cch, PCRTUCS2 pwszString)
{
return RTUtf16ToUtf8Ex(pwszString, RTSTR_MAX, ppszString, cch, NULL);
}
/**
* Free a UCS-2 string allocated by RTStrUtf8ToUcs2().
*
* @returns iprt status code.
* @param pwszString Pointer to buffer with unicode string to free.
* NULL is accepted.
* @deprecated
*/
DECLINLINE(void) RTStrUcs2Free(PRTUCS2 pwszString)
{
RTUtf16Free(pwszString);
}
/**
* Allocates a new copy of the given UCS-2 string.
*
* @returns Pointer to the allocated string copy. Use RTStrUcs2Free() to free it.
* @returns NULL when out of memory.
* @param pwszString UCS-2 string to duplicate.
* @deprecated
*/
DECLINLINE(PRTUCS2) RTStrUcs2Dup(PCRTUCS2 pwszString)
{
return RTUtf16Dup(pwszString);
}
/**
* Allocates a new copy of the given UCS-2 string.
*
* @returns iprt status code.
* @param ppwszString Receives pointer of the allocated UCS-2 string.
* The returned pointer must be freed using RTStrUcs2Free().
* @param pwszString UCS-2 string to duplicate.
* @deprecated
*/
DECLINLINE(int) RTStrUcs2DupEx(PRTUCS2 *ppwszString, PCRTUCS2 pwszString)
{
return RTUtf16DupEx(ppwszString, pwszString, 0);
}
/**
* Returns the length of a UCS-2 string in UCS-2 characters
* without trailing '\\0'.
*
* @returns Length of input string in UCS-2 characters.
* @param pwszString Pointer the UCS-2 string.
* @deprecated
*/
DECLINLINE(size_t) RTStrUcs2Len(PCRTUCS2 pwszString)
{
return RTUtf16Len(pwszString);
}
/**
* Performs a case sensitive string compare between two UCS-2 strings.
*
* @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 UCS-2 string.
* @param pwsz2 Second UCS-2 string.
* @deprecated
*/
DECLINLINE(int) RTStrUcs2Cmp(register PCRTUCS2 pwsz1, register PCRTUCS2 pwsz2)
{
return RTUtf16Cmp(pwsz1, pwsz2);
}
/**
* 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 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 sould not be RTUNICP_INVALID or any other charater
* 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 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 sould not be RTUNICP_INVALID or any other charater
* 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);
}
/** @} */
__END_DECLS
/** @} */
#endif