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Diffstat (limited to 'include/iprt/string.h')
| -rw-r--r-- | include/iprt/string.h | 3725 |
1 files changed, 3725 insertions, 0 deletions
diff --git a/include/iprt/string.h b/include/iprt/string.h new file mode 100644 index 00000000..d7b78bf3 --- /dev/null +++ b/include/iprt/string.h @@ -0,0 +1,3725 @@ +/** @file + * IPRT - String Manipulation. + */ + +/* + * Copyright (C) 2006-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program 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 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox 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. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + +#ifndef IPRT_INCLUDED_string_h +#define IPRT_INCLUDED_string_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <iprt/cdefs.h> +#include <iprt/types.h> +#include <iprt/assert.h> +#include <iprt/stdarg.h> +#include <iprt/errcore.h> /* for VINF_SUCCESS */ +#if defined(RT_OS_LINUX) && defined(__KERNEL__) + /* no C++ hacks ('new' etc) here anymore! */ +# include <linux/string.h> + +#elif defined(IN_XF86_MODULE) && !defined(NO_ANSIC) + RT_C_DECLS_BEGIN +# include "xf86_ansic.h" + RT_C_DECLS_END + +#elif defined(RT_OS_FREEBSD) && defined(_KERNEL) + RT_C_DECLS_BEGIN +# include <sys/libkern.h> + RT_C_DECLS_END + +#elif defined(RT_OS_NETBSD) && defined(_KERNEL) + RT_C_DECLS_BEGIN +# include <lib/libkern/libkern.h> + RT_C_DECLS_END + +#elif defined(RT_OS_SOLARIS) && defined(_KERNEL) + /* + * Same case as with FreeBSD kernel: + * The string.h stuff clashes with sys/system.h + * ffs = find first set bit. + */ +# define ffs ffs_string_h +# define fls fls_string_h +# include <string.h> +# undef fls +# 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) +RT_C_DECLS_BEGIN +void *memchr(const void *pv, int ch, size_t cb); +char *strpbrk(const char *pszStr, const char *pszChars); +RT_C_DECLS_END +#endif + +#if defined(RT_OS_FREEBSD) && defined(_KERNEL) +RT_C_DECLS_BEGIN +char *strpbrk(const char *pszStr, const char *pszChars); +RT_C_DECLS_END +#endif + +#if defined(RT_OS_NETBSD) && defined(_KERNEL) +RT_C_DECLS_BEGIN +char *strpbrk(const char *pszStr, const char *pszChars); +RT_C_DECLS_END +#endif + +#if (defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_WINDOWS)) && !defined(IPRT_NO_CRT) +RT_C_DECLS_BEGIN +# if !defined(RT_OS_DARWIN) || RT_CLANG_PREREQ(7 /* whatever post gcc-4.2 */, 0) +RTDECL(void *) mempcpy(void *pvDst, const void *pvSrc, size_t cb); +# else +void *mempcpy(void *pvDst, const void *pvSrc, size_t cb); +# endif +RT_C_DECLS_END +#endif + +#if (!defined(RT_OS_LINUX) || !defined(_GNU_SOURCE)) \ + && (!defined(RT_OS_OS2) || !defined(_GNU_SOURCE)) \ + && !defined(RT_OS_FREEBSD) \ + && !defined(RT_OS_NETBSD) +RT_C_DECLS_BEGIN +void *memrchr(const void *pv, int ch, size_t cb); +RT_C_DECLS_END +#endif + + +/** @def RT_USE_RTC_3629 + * When defined the UTF-8 range will stop at 0x10ffff. If not defined, the + * range stops at 0x7fffffff. + * @remarks Must be defined both when building and using the IPRT. */ +#ifdef DOXYGEN_RUNNING +# define RT_USE_RTC_3629 +#endif + + +/** + * Byte zero the specified object. + * + * This will use sizeof(Obj) to figure the size and will call memset, bzero + * or some compiler intrinsic to perform the actual zeroing. + * + * @param Obj The object to zero. Make sure to dereference pointers. + * + * @remarks Because the macro may use memset it has been placed in string.h + * instead of cdefs.h to avoid build issues because someone forgot + * to include this header. + * + * @ingroup grp_rt_cdefs + */ +#define RT_ZERO(Obj) RT_BZERO(&(Obj), sizeof(Obj)) + +/** + * Byte zero the specified memory area. + * + * This will call memset, bzero or some compiler intrinsic to clear the + * specified bytes of memory. + * + * @param pv Pointer to the memory. + * @param cb The number of bytes to clear. Please, don't pass 0. + * + * @remarks Because the macro may use memset it has been placed in string.h + * instead of cdefs.h to avoid build issues because someone forgot + * to include this header. + * + * @ingroup grp_rt_cdefs + */ +#define RT_BZERO(pv, cb) do { memset((pv), 0, cb); } while (0) + + +/** + * For copying a volatile variable to a non-volatile one. + * @param a_Dst The non-volatile destination variable. + * @param a_VolatileSrc The volatile source variable / dereferenced pointer. + */ +#define RT_COPY_VOLATILE(a_Dst, a_VolatileSrc) \ + do { \ + void const volatile *a_pvVolatileSrc_BCopy_Volatile = &(a_VolatileSrc); \ + AssertCompile(sizeof(a_Dst) == sizeof(a_VolatileSrc)); \ + memcpy(&(a_Dst), (void const *)a_pvVolatileSrc_BCopy_Volatile, sizeof(a_Dst)); \ + } while (0) + +/** + * For copy a number of bytes from a volatile buffer to a non-volatile one. + * + * @param a_pDst Pointer to the destination buffer. + * @param a_pVolatileSrc Pointer to the volatile source buffer. + * @param a_cbToCopy Number of bytes to copy. + */ +#define RT_BCOPY_VOLATILE(a_pDst, a_pVolatileSrc, a_cbToCopy) \ + do { \ + void const volatile *a_pvVolatileSrc_BCopy_Volatile = (a_pVolatileSrc); \ + memcpy((a_pDst), (void const *)a_pvVolatileSrc_BCopy_Volatile, (a_cbToCopy)); \ + } while (0) + + +/** @defgroup grp_rt_str RTStr - String Manipulation + * Mostly UTF-8 related helpers where the standard string functions won't do. + * @ingroup grp_rt + * @{ + */ + +RT_C_DECLS_BEGIN + + +/** + * The maximum string length. + */ +#define RTSTR_MAX (~(size_t)0) + + +/** @def RTSTR_TAG + * The default allocation tag used by the RTStr allocation APIs. + * + * When not defined before the inclusion of iprt/string.h, this will default to + * the pointer to the current file name. The string API will make of use of + * this as pointer to a volatile but read-only string. + */ +#if !defined(RTSTR_TAG) || defined(DOXYGEN_RUNNING) +# define RTSTR_TAG (__FILE__) +#endif + + +#ifdef IN_RING3 + +/** + * Allocates tmp buffer with default tag, 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. + */ +#define RTStrUtf8ToCurrentCP(ppszString, pszString) RTStrUtf8ToCurrentCPTag((ppszString), (pszString), RTSTR_TAG) + +/** + * Allocates tmp buffer with custom tag, translates pszString from UTF-8 to + * current codepage. + * + * @returns iprt status code. + * @param ppszString Receives pointer of allocated native CP string. + * The returned pointer must be freed using + * RTStrFree()., const char *pszTag + * @param pszString UTF-8 string to convert. + * @param pszTag Allocation tag used for statistics and such. + */ +RTR3DECL(int) RTStrUtf8ToCurrentCPTag(char **ppszString, const char *pszString, const char *pszTag); + +/** + * Allocates tmp buffer with default tag, translates pszString from UTF-8 to + * current codepage, extended version. + * + * @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. + * @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. + */ +#define RTStrUtf8ToCurrentCPEx(ppszString, pszString, cchString) \ + RTStrUtf8ToCurrentCPExTag((ppszString), (pszString), (cchString), RTSTR_TAG) + +/** + * Allocates tmp buffer with custom tag, 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()., const char *pszTag + * @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 pszTag Allocation tag used for statistics and such. + */ +RTR3DECL(int) RTStrUtf8ToCurrentCPExTag(char **ppszString, const char *pszString, size_t cchString, const char *pszTag); + +/** + * 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. + */ +#define RTStrCurrentCPToUtf8(ppszString, pszString) RTStrCurrentCPToUtf8Tag((ppszString), (pszString), RTSTR_TAG) + +/** + * 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. + * @param pszTag Allocation tag used for statistics and such. + */ +RTR3DECL(int) RTStrCurrentCPToUtf8Tag(char **ppszString, const char *pszString, const char *pszTag); + +/** + * Allocates tmp buffer, translates pszString from console 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. + */ +#define RTStrConsoleCPToUtf8(ppszString, pszString) RTStrConsoleCPToUtf8Tag((ppszString), (pszString), RTSTR_TAG) + +/** + * Allocates tmp buffer, translates pszString from console 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. + * @param pszTag Allocation tag used for statistics and such. + */ +RTR3DECL(int) RTStrConsoleCPToUtf8Tag(char **ppszString, const char *pszString, const char *pszTag); + +#endif /* IN_RING3 */ + +/** + * 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 (default tag). + * + * @returns Pointer to the allocated UTF-8 string. + * @param pszString UTF-8 string to duplicate. + */ +#define RTStrDup(pszString) RTStrDupTag((pszString), RTSTR_TAG) + +/** + * Allocates a new copy of the given UTF-8 string (custom tag). + * + * @returns Pointer to the allocated UTF-8 string. + * @param pszString UTF-8 string to duplicate. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(char *) RTStrDupTag(const char *pszString, const char *pszTag); + +/** + * Allocates a new copy of the given UTF-8 string (default tag). + * + * @returns iprt status code. + * @param ppszCopy Receives pointer of the allocated UTF-8 string. + * The returned pointer must be freed using RTStrFree(). + * @param pszString UTF-8 string to duplicate. + */ +#define RTStrDupEx(ppszCopy, pszString) RTStrDupExTag((ppszCopy), (pszString), RTSTR_TAG) + +/** + * Allocates a new copy of the given UTF-8 string (custom tag). + * + * @returns iprt status code. + * @param ppszCopy Receives pointer of the allocated UTF-8 string. + * The returned pointer must be freed using RTStrFree(). + * @param pszString UTF-8 string to duplicate. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrDupExTag(char **ppszCopy, const char *pszString, const char *pszTag); + +/** + * Allocates a new copy of the given UTF-8 substring (default tag). + * + * @returns Pointer to the allocated UTF-8 substring. + * @param pszString UTF-8 string to duplicate. + * @param cchMax The max number of chars to duplicate, not counting + * the terminator. + */ +#define RTStrDupN(pszString, cchMax) RTStrDupNTag((pszString), (cchMax), RTSTR_TAG) + +/** + * Allocates a new copy of the given UTF-8 substring (custom tag). + * + * @returns Pointer to the allocated UTF-8 substring. + * @param pszString UTF-8 string to duplicate. + * @param cchMax The max number of chars to duplicate, not counting + * the terminator. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(char *) RTStrDupNTag(const char *pszString, size_t cchMax, const char *pszTag); + +/** + * Allocates a new copy of the given UTF-8 substring (default tag). + * + * @returns iprt status code (VINF_SUCCESS or VERR_NO_STR_MEMORY). + * @param ppszCopy Receives pointer of the allocated UTF-8 substring. + * The returned pointer must be freed using RTStrFree(). + * @param pszString UTF-8 string to duplicate. + * @param cchMax The max number of chars to duplicate, not counting + * the terminator. + */ +#define RTStrDupNEx(ppszCopy, pszString, cchMax) RTStrDupNExTag((ppszCopy), (pszString), (cchMax), RTSTR_TAG) + +/** + * Allocates a new copy of the given UTF-8 substring (custom tag). + * + * @returns iprt status code (VINF_SUCCESS or VERR_NO_STR_MEMORY). + * @param ppszCopy Receives pointer of the allocated UTF-8 substring. + * The returned pointer must be freed using RTStrFree(). + * @param pszString UTF-8 string to duplicate. + * @param cchMax The max number of chars to duplicate, not counting + * the terminator. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrDupNExTag(char **ppszCopy, const char *pszString, size_t cchMax, const char *pszTag); + +/** + * Appends a string onto an existing IPRT allocated string (default tag). + * + * @retval VINF_SUCCESS + * @retval VERR_NO_STR_MEMORY if we failed to reallocate the string, @a *ppsz + * remains unchanged. + * + * @param ppsz Pointer to the string pointer. The string + * pointer must either be NULL or point to a string + * returned by an IPRT string API. (In/Out) + * @param pszAppend The string to append. NULL and empty strings + * are quietly ignored. + */ +#define RTStrAAppend(ppsz, pszAppend) RTStrAAppendTag((ppsz), (pszAppend), RTSTR_TAG) + +/** + * Appends a string onto an existing IPRT allocated string (custom tag). + * + * @retval VINF_SUCCESS + * @retval VERR_NO_STR_MEMORY if we failed to reallocate the string, @a *ppsz + * remains unchanged. + * + * @param ppsz Pointer to the string pointer. The string + * pointer must either be NULL or point to a string + * returned by an IPRT string API. (In/Out) + * @param pszAppend The string to append. NULL and empty strings + * are quietly ignored. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrAAppendTag(char **ppsz, const char *pszAppend, const char *pszTag); + +/** + * Appends N bytes from a strings onto an existing IPRT allocated string + * (default tag). + * + * @retval VINF_SUCCESS + * @retval VERR_NO_STR_MEMORY if we failed to reallocate the string, @a *ppsz + * remains unchanged. + * + * @param ppsz Pointer to the string pointer. The string + * pointer must either be NULL or point to a string + * returned by an IPRT string API. (In/Out) + * @param pszAppend The string to append. Can be NULL if cchAppend + * is NULL. + * @param cchAppend The number of chars (not code points) to append + * from pszAppend. Must not be more than + * @a pszAppend contains, except for the special + * value RTSTR_MAX that can be used to indicate all + * of @a pszAppend without having to strlen it. + */ +#define RTStrAAppendN(ppsz, pszAppend, cchAppend) RTStrAAppendNTag((ppsz), (pszAppend), (cchAppend), RTSTR_TAG) + +/** + * Appends N bytes from a strings onto an existing IPRT allocated string (custom + * tag). + * + * @retval VINF_SUCCESS + * @retval VERR_NO_STR_MEMORY if we failed to reallocate the string, @a *ppsz + * remains unchanged. + * + * @param ppsz Pointer to the string pointer. The string + * pointer must either be NULL or point to a string + * returned by an IPRT string API. (In/Out) + * @param pszAppend The string to append. Can be NULL if cchAppend + * is NULL. + * @param cchAppend The number of chars (not code points) to append + * from pszAppend. Must not be more than + * @a pszAppend contains, except for the special + * value RTSTR_MAX that can be used to indicate all + * of @a pszAppend without having to strlen it. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrAAppendNTag(char **ppsz, const char *pszAppend, size_t cchAppend, const char *pszTag); + +/** + * Appends one or more strings onto an existing IPRT allocated string. + * + * This is a very flexible and efficient alternative to using RTStrAPrintf to + * combine several strings together. + * + * @retval VINF_SUCCESS + * @retval VERR_NO_STR_MEMORY if we failed to reallocate the string, @a *ppsz + * remains unchanged. + * + * @param ppsz Pointer to the string pointer. The string + * pointer must either be NULL or point to a string + * returned by an IPRT string API. (In/Out) + * @param cPairs The number of string / length pairs in the + * @a va. + * @param va List of string (const char *) and length + * (size_t) pairs. The strings will be appended to + * the string in the first argument. + */ +#define RTStrAAppendExNV(ppsz, cPairs, va) RTStrAAppendExNVTag((ppsz), (cPairs), (va), RTSTR_TAG) + +/** + * Appends one or more strings onto an existing IPRT allocated string. + * + * This is a very flexible and efficient alternative to using RTStrAPrintf to + * combine several strings together. + * + * @retval VINF_SUCCESS + * @retval VERR_NO_STR_MEMORY if we failed to reallocate the string, @a *ppsz + * remains unchanged. + * + * @param ppsz Pointer to the string pointer. The string + * pointer must either be NULL or point to a string + * returned by an IPRT string API. (In/Out) + * @param cPairs The number of string / length pairs in the + * @a va. + * @param va List of string (const char *) and length + * (size_t) pairs. The strings will be appended to + * the string in the first argument. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrAAppendExNVTag(char **ppsz, size_t cPairs, va_list va, const char *pszTag); + +/** + * Appends one or more strings onto an existing IPRT allocated string + * (untagged). + * + * This is a very flexible and efficient alternative to using RTStrAPrintf to + * combine several strings together. + * + * @retval VINF_SUCCESS + * @retval VERR_NO_STR_MEMORY if we failed to reallocate the string, @a *ppsz + * remains unchanged. + * + * @param ppsz Pointer to the string pointer. The string + * pointer must either be NULL or point to a string + * returned by an IPRT string API. (In/Out) + * @param cPairs The number of string / length pairs in the + * ellipsis. + * @param ... List of string (const char *) and length + * (size_t) pairs. The strings will be appended to + * the string in the first argument. + */ +DECLINLINE(int) RTStrAAppendExN(char **ppsz, size_t cPairs, ...) +{ + int rc; + va_list va; + va_start(va, cPairs); + rc = RTStrAAppendExNVTag(ppsz, cPairs, va, RTSTR_TAG); + va_end(va); + return rc; +} + +/** + * Appends one or more strings onto an existing IPRT allocated string (custom + * tag). + * + * This is a very flexible and efficient alternative to using RTStrAPrintf to + * combine several strings together. + * + * @retval VINF_SUCCESS + * @retval VERR_NO_STR_MEMORY if we failed to reallocate the string, @a *ppsz + * remains unchanged. + * + * @param ppsz Pointer to the string pointer. The string + * pointer must either be NULL or point to a string + * returned by an IPRT string API. (In/Out) + * @param pszTag Allocation tag used for statistics and such. + * @param cPairs The number of string / length pairs in the + * ellipsis. + * @param ... List of string (const char *) and length + * (size_t) pairs. The strings will be appended to + * the string in the first argument. + */ +DECLINLINE(int) RTStrAAppendExNTag(char **ppsz, const char *pszTag, size_t cPairs, ...) +{ + int rc; + va_list va; + va_start(va, cPairs); + rc = RTStrAAppendExNVTag(ppsz, cPairs, va, pszTag); + va_end(va); + return rc; +} + +/** + * Truncates an IPRT allocated string (default tag). + * + * @retval VINF_SUCCESS. + * @retval VERR_OUT_OF_RANGE if cchNew is too long. Nothing is done. + * + * @param ppsz Pointer to the string pointer. The string + * pointer can be NULL if @a cchNew is 0, no change + * is made then. If we actually reallocate the + * string, the string pointer might be changed by + * this call. (In/Out) + * @param cchNew The new string length (excluding the + * terminator). The string must be at least this + * long or we'll return VERR_OUT_OF_RANGE and + * assert on you. + */ +#define RTStrATruncate(ppsz, cchNew) RTStrATruncateTag((ppsz), (cchNew), RTSTR_TAG) + +/** + * Truncates an IPRT allocated string. + * + * @retval VINF_SUCCESS. + * @retval VERR_OUT_OF_RANGE if cchNew is too long. Nothing is done. + * + * @param ppsz Pointer to the string pointer. The string + * pointer can be NULL if @a cchNew is 0, no change + * is made then. If we actually reallocate the + * string, the string pointer might be changed by + * this call. (In/Out) + * @param cchNew The new string length (excluding the + * terminator). The string must be at least this + * long or we'll return VERR_OUT_OF_RANGE and + * assert on you. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrATruncateTag(char **ppsz, size_t cchNew, const char *pszTag); + +/** + * Allocates memory for 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 string. The first byte 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 RTStrFree. + * + * NULL is returned if the allocation failed. Please translate this to + * VERR_NO_STR_MEMORY and not VERR_NO_MEMORY. Also consider + * RTStrAllocEx if an IPRT status code is required. + * + * @param cb How many bytes to allocate. If this is zero, we + * will allocate a terminator byte anyway. + */ +#define RTStrAlloc(cb) RTStrAllocTag((cb), RTSTR_TAG) + +/** + * Allocates memory for 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 string. The first byte 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 RTStrFree. + * + * NULL is returned if the allocation failed. Please translate this to + * VERR_NO_STR_MEMORY and not VERR_NO_MEMORY. Also consider + * RTStrAllocEx if an IPRT status code is required. + * + * @param cb How many bytes to allocate. If this is zero, we + * will allocate a terminator byte anyway. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(char *) RTStrAllocTag(size_t cb, const char *pszTag); + +/** + * Allocates memory for string storage, with status code (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. + * + * @retval VINF_SUCCESS + * @retval VERR_NO_STR_MEMORY + * + * @param ppsz Where to return the allocated string. This will + * be set to NULL on failure. On success, the + * returned memory will always start with a + * terminator char so that it is considered a valid + * C string, the contents of rest of the memory is + * undefined. + * @param cb How many bytes to allocate. If this is zero, we + * will allocate a terminator byte anyway. + */ +#define RTStrAllocEx(ppsz, cb) RTStrAllocExTag((ppsz), (cb), RTSTR_TAG) + +/** + * Allocates memory for string storage, with status code (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. + * + * @retval VINF_SUCCESS + * @retval VERR_NO_STR_MEMORY + * + * @param ppsz Where to return the allocated string. This will + * be set to NULL on failure. On success, the + * returned memory will always start with a + * terminator char so that it is considered a valid + * C string, the contents of rest of the memory is + * undefined. + * @param cb How many bytes to allocate. If this is zero, we + * will allocate a terminator byte anyway. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrAllocExTag(char **ppsz, size_t cb, const char *pszTag); + +/** + * Reallocates the specified string (default tag). + * + * You should normally not have use this function, except perhaps to truncate a + * really long string you've got from some IPRT string API, but then you should + * use RTStrATruncate. + * + * @returns VINF_SUCCESS. + * @retval VERR_NO_STR_MEMORY if we failed to reallocate the string, @a *ppsz + * remains unchanged. + * + * @param ppsz Pointer to the string variable containing the + * input and output string. + * + * When not freeing the string, the result will + * always have the last byte set to the terminator + * character so that when used for string + * truncation the result will be a valid C string + * (your job to keep it a valid UTF-8 string). + * + * When the input string is NULL and we're supposed + * to reallocate, the returned string will also + * have the first byte set to the terminator char + * so it will be a valid C string. + * + * @param cbNew When @a cbNew is zero, we'll behave like + * RTStrFree and @a *ppsz will be set to NULL. + * + * When not zero, this will be the new size of the + * memory backing the string, i.e. it includes the + * terminator char. + */ +#define RTStrRealloc(ppsz, cbNew) RTStrReallocTag((ppsz), (cbNew), RTSTR_TAG) + +/** + * Reallocates the specified string (custom tag). + * + * You should normally not have use this function, except perhaps to truncate a + * really long string you've got from some IPRT string API, but then you should + * use RTStrATruncate. + * + * @returns VINF_SUCCESS. + * @retval VERR_NO_STR_MEMORY if we failed to reallocate the string, @a *ppsz + * remains unchanged. + * + * @param ppsz Pointer to the string variable containing the + * input and output string. + * + * When not freeing the string, the result will + * always have the last byte set to the terminator + * character so that when used for string + * truncation the result will be a valid C string + * (your job to keep it a valid UTF-8 string). + * + * When the input string is NULL and we're supposed + * to reallocate, the returned string will also + * have the first byte set to the terminator char + * so it will be a valid C string. + * + * @param cbNew When @a cbNew is zero, we'll behave like + * RTStrFree and @a *ppsz will be set to NULL. + * + * When not zero, this will be the new size of the + * memory backing the string, i.e. it includes the + * terminator char. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrReallocTag(char **ppsz, size_t cbNew, const char *pszTag); + +/** + * Validates the UTF-8 encoding of the string. + * + * @returns iprt status code. + * @param psz The string. + */ +RTDECL(int) RTStrValidateEncoding(const char *psz); + +/** @name Flags for RTStrValidateEncodingEx and RTUtf16ValidateEncodingEx + * @{ + */ +/** Check that the string is zero terminated within the given size. + * VERR_BUFFER_OVERFLOW will be returned if the check fails. */ +#define RTSTR_VALIDATE_ENCODING_ZERO_TERMINATED RT_BIT_32(0) +/** Check that the string is exactly the given length. + * If it terminates early, VERR_BUFFER_UNDERFLOW will be returned. When used + * together with RTSTR_VALIDATE_ENCODING_ZERO_TERMINATED, the given length must + * include the terminator or VERR_BUFFER_OVERFLOW will be returned. */ +#define RTSTR_VALIDATE_ENCODING_EXACT_LENGTH RT_BIT_32(1) +/** @} */ + +/** + * Validates the UTF-8 encoding of the string. + * + * @returns iprt status code. + * @param psz The string. + * @param cch The max string length (/ size). Use RTSTR_MAX to + * process the entire string. + * @param fFlags Combination of RTSTR_VALIDATE_ENCODING_XXX flags. + */ +RTDECL(int) RTStrValidateEncodingEx(const char *psz, size_t cch, uint32_t fFlags); + +/** + * Checks if the UTF-8 encoding is valid. + * + * @returns true / false. + * @param psz The string. + */ +RTDECL(bool) RTStrIsValidEncoding(const char *psz); + +/** + * Purge all bad UTF-8 encoding in the string, replacing it with '?'. + * + * @returns The number of bad characters (0 if nothing was done). + * @param psz The string to purge. + */ +RTDECL(size_t) RTStrPurgeEncoding(char *psz); + +/** + * Sanitizes a (valid) UTF-8 string by replacing all characters outside a white + * list in-place by an ASCII replacedment character. + * + * Multi-byte characters will be replaced byte by byte. + * + * @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 psz 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. + */ +RTDECL(ssize_t) RTStrPurgeComplementSet(char *psz, PCRTUNICP puszValidPairs, char chReplacement); + +/** + * 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 requested 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, + * 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. + */ +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 purposes 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 (default + * tag). + * + * @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(). + */ +#define RTStrToUtf16(pszString, ppwszString) RTStrToUtf16Tag((pszString), (ppwszString), RTSTR_TAG) + +/** + * Translate a UTF-8 string into a UTF-16 allocating the result buffer (custom + * tag). + * + * This differs from RTStrToUtf16 in that it always produces a + * big-endian string. + * + * @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(). + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrToUtf16Tag(const char *pszString, PRTUTF16 *ppwszString, const char *pszTag); + +/** + * Translate a UTF-8 string into a UTF-16BE allocating the result buffer + * (default tag). + * + * This differs from RTStrToUtf16Tag in that it always produces a + * big-endian string. + * + * @returns iprt status code. + * @param pszString UTF-8 string to convert. + * @param ppwszString Receives pointer to the allocated UTF-16BE string. + * The returned string must be freed using RTUtf16Free(). + */ +#define RTStrToUtf16Big(pszString, ppwszString) RTStrToUtf16BigTag((pszString), (ppwszString), RTSTR_TAG) + +/** + * Translate a UTF-8 string into a UTF-16BE allocating the result buffer (custom + * tag). + * + * @returns iprt status code. + * @param pszString UTF-8 string to convert. + * @param ppwszString Receives pointer to the allocated UTF-16BE string. + * The returned string must be freed using RTUtf16Free(). + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrToUtf16BigTag(const char *pszString, PRTUTF16 *ppwszString, const char *pszTag); + +/** + * 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 requested 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, + * 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 RTStrToUtf16Ex(pszString, cchString, ppwsz, cwc, pcwc) \ + RTStrToUtf16ExTag((pszString), (cchString), (ppwsz), (cwc), (pcwc), RTSTR_TAG) + +/** + * Translates pszString from UTF-8 to UTF-16, allocating the result buffer if + * requested (custom tag). + * + * @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 requested 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, + * 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) RTStrToUtf16ExTag(const char *pszString, size_t cchString, + PRTUTF16 *ppwsz, size_t cwc, size_t *pcwc, const char *pszTag); + + +/** + * Translates pszString from UTF-8 to UTF-16BE, allocating the result buffer if requested. + * + * This differs from RTStrToUtf16Ex in that it always produces a + * big-endian string. + * + * @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 requested 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, + * 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 RTStrToUtf16BigEx(pszString, cchString, ppwsz, cwc, pcwc) \ + RTStrToUtf16BigExTag((pszString), (cchString), (ppwsz), (cwc), (pcwc), RTSTR_TAG) + +/** + * Translates pszString from UTF-8 to UTF-16BE, allocating the result buffer if + * requested (custom tag). + * + * This differs from RTStrToUtf16ExTag in that it always produces a + * big-endian string. + * + * @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 requested 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, + * 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) RTStrToUtf16BigExTag(const char *pszString, size_t cchString, + PRTUTF16 *ppwsz, size_t cwc, size_t *pcwc, const char *pszTag); + + +/** + * Calculates the length of the string in Latin-1 characters. + * + * This function will validate the string, and incorrectly encoded UTF-8 + * strings as well as string with codepoints outside the latin-1 range will be + * rejected. The primary purpose of this function is to help allocate buffers + * for RTStrToLatin1Ex of the correct size. For most other purposes + * RTStrCalcLatin1LenEx() should be used. + * + * @returns Number of Latin-1 characters. + * @returns 0 if the string was incorrectly encoded. + * @param psz The string. + */ +RTDECL(size_t) RTStrCalcLatin1Len(const char *psz); + +/** + * Calculates the length of the string in Latin-1 characters. + * + * This function will validate the string, and incorrectly encoded UTF-8 + * strings as well as string with codepoints outside the latin-1 range 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 pcch Where to store the string length. Optional. + * This is undefined on failure. + */ +RTDECL(int) RTStrCalcLatin1LenEx(const char *psz, size_t cch, size_t *pcch); + +/** + * Translate a UTF-8 string into a Latin-1 allocating the result buffer (default + * tag). + * + * @returns iprt status code. + * @param pszString UTF-8 string to convert. + * @param ppszString Receives pointer to the allocated Latin-1 string. + * The returned string must be freed using RTStrFree(). + */ +#define RTStrToLatin1(pszString, ppszString) RTStrToLatin1Tag((pszString), (ppszString), RTSTR_TAG) + +/** + * Translate a UTF-8 string into a Latin-1 allocating the result buffer (custom + * tag). + * + * @returns iprt status code. + * @param pszString UTF-8 string to convert. + * @param ppszString Receives pointer to the allocated Latin-1 string. + * The returned string must be freed using RTStrFree(). + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrToLatin1Tag(const char *pszString, char **ppszString, const char *pszTag); + +/** + * Translates pszString from UTF-8 to Latin-1, 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 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 items 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 bytes. 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 RTStrToLatin1Ex(pszString, cchString, ppsz, cch, pcch) \ + RTStrToLatin1ExTag((pszString), (cchString), (ppsz), (cch), (pcch), RTSTR_TAG) + +/** + * Translates pszString from UTF-8 to Latin1, allocating the result buffer if + * requested (custom tag). + * + * @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 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 items 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 bytes. 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) RTStrToLatin1ExTag(const char *pszString, size_t cchString, char **ppsz, size_t cch, size_t *pcch, const char *pszTag); + +/** + * 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 iprt status code + * @returns VERR_INVALID_UTF8_ENCODING if the encoding is invalid. + * @param ppsz The string cursor. + * This is advanced one character forward on failure. + * @param pCp Where to store the unicode code point. + * Stores RTUNICP_INVALID if the encoding is invalid. + */ +RTDECL(int) RTStrGetCpExInternal(const char **ppsz, PRTUNICP pCp); + +/** + * Get the unicode code point at the given string position for a string of a + * given length. + * + * @returns iprt status code + * @retval VERR_INVALID_UTF8_ENCODING if the encoding is invalid. + * @retval VERR_END_OF_STRING if *pcch is 0. *pCp is set to RTUNICP_INVALID. + * + * @param ppsz The string. + * @param pcch Pointer to the length of the string. This will be + * decremented by the size of the code point. + * @param pCp Where to store the unicode code point. + * Stores RTUNICP_INVALID if the encoding is invalid. + */ +RTDECL(int) RTStrGetCpNExInternal(const char **ppsz, size_t *pcch, 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 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 should not be RTUNICP_INVALID or any other + * character 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. + * This is advanced one character forward on failure. + * @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); +} + +/** + * Get the unicode code point at the given string position for a string of a + * given maximum length. + * + * @returns iprt status code. + * @retval VERR_INVALID_UTF8_ENCODING if the encoding is invalid. + * @retval VERR_END_OF_STRING if *pcch is 0. *pCp is set to RTUNICP_INVALID. + * + * @param ppsz Pointer to the string pointer. This will be updated to + * point to the char following the current code point. + * @param pcch Pointer to the maximum string length. This will be + * decremented by the size of the code point found. + * @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 RTStrGetCpNExInternal(). + */ +DECLINLINE(int) RTStrGetCpNEx(const char **ppsz, size_t *pcch, PRTUNICP pCp) +{ + if (RT_LIKELY(*pcch != 0)) + { + const unsigned char uch = **(const unsigned char **)ppsz; + if (!(uch & RT_BIT(7))) + { + (*ppsz)++; + (*pcch)--; + *pCp = uch; + return VINF_SUCCESS; + } + } + return RTStrGetCpNExInternal(ppsz, pcch, pCp); +} + +/** + * Get the UTF-8 size in characters of a given Unicode code point. + * + * The code point is expected to be a valid Unicode one, but not necessarily in + * the range supported by UTF-8. + * + * @returns The number of chars (bytes) required to encode the code point, or + * zero if there is no UTF-8 encoding. + * @param CodePoint The unicode code point. + */ +DECLINLINE(size_t) RTStrCpSize(RTUNICP CodePoint) +{ + if (CodePoint < 0x00000080) + return 1; + if (CodePoint < 0x00000800) + return 2; + if (CodePoint < 0x00010000) + return 3; +#ifdef RT_USE_RTC_3629 + if (CodePoint < 0x00011000) + return 4; +#else + if (CodePoint < 0x00200000) + return 4; + if (CodePoint < 0x04000000) + return 5; + if (CodePoint < 0x7fffffff) + return 6; +#endif + return 0; +} + +/** + * 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 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 should not be RTUNICP_INVALID or any other + * character 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++ = (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); + + +/** @page pg_rt_str_format The IPRT Format Strings + * + * IPRT implements most of the commonly used format types and flags with the + * exception of floating point which is completely missing. In addition IPRT + * provides a number of IPRT specific format types for the IPRT typedefs and + * other useful things. Note that several of these extensions are similar to + * \%p and doesn't care much if you try add formating flags/width/precision. + * + * + * Group 0a, The commonly used format types: + * - \%s - Takes a pointer to a zero terminated string (UTF-8) and + * prints it with the optionally adjustment (width, -) and + * length restriction (precision). + * - \%ls - Same as \%s except that the input is UTF-16 (output UTF-8). + * - \%Ls - Same as \%s except that the input is UCS-32 (output UTF-8). + * - \%S - Same as \%s, used to convert to current codeset but this is + * now done by the streams code. Deprecated, use \%s. + * - \%lS - Ditto. Deprecated, use \%ls. + * - \%LS - Ditto. Deprecated, use \%Ls. + * - \%c - Takes a char and prints it. + * - \%d - Takes a signed integer and prints it as decimal. Thousand + * separator (\'), zero padding (0), adjustment (-+), width, + * precision + * - \%i - Same as \%d. + * - \%u - Takes an unsigned integer and prints it as decimal. Thousand + * separator (\'), zero padding (0), adjustment (-+), width, + * precision + * - \%x - Takes an unsigned integer and prints it as lowercased + * hexadecimal. The special hash (\#) flag causes a '0x' + * prefixed to be printed. Zero padding (0), adjustment (-+), + * width, precision. + * - \%X - Same as \%x except that it is uppercased. + * - \%o - Takes an unsigned (?) integer and prints it as octal. Zero + * padding (0), adjustment (-+), width, precision. + * - \%p - Takes a pointer (void technically) and prints it. Zero + * padding (0), adjustment (-+), width, precision. + * + * The \%d, \%i, \%u, \%x, \%X and \%o format types support the following + * argument type specifiers: + * - \%ll - long long (uint64_t). + * - \%L - long long (uint64_t). + * - \%l - long (uint32_t, uint64_t) + * - \%h - short (int16_t). + * - \%hh - char (int8_t). + * - \%H - char (int8_t). + * - \%z - size_t. + * - \%j - intmax_t (int64_t). + * - \%t - ptrdiff_t. + * The type in parentheses is typical sizes, however when printing those types + * you are better off using the special group 2 format types below (\%RX32 and + * such). + * + * + * Group 0b, IPRT format tricks: + * - %M - Replaces the format string, takes a string pointer. + * - %N - Nested formatting, takes a pointer to a format string + * followed by the pointer to a va_list variable. The va_list + * variable will not be modified and the caller must do va_end() + * on it. Make sure the va_list variable is NOT in a parameter + * list or some gcc versions/targets may get it all wrong. + * + * + * Group 1, the basic runtime typedefs (excluding those which obviously are + * pointer): + * - \%RTbool - Takes a bool value and prints 'true', 'false', or '!%d!'. + * - \%RTeic - Takes a #PCRTERRINFO value outputting 'rc: msg', + * or 'rc - msg' with the \# flag. + * - \%RTeim - Takes a #PCRTERRINFO value outputting ': msg', or + * ' - msg' with the \# flag. + * - \%RTfile - Takes a #RTFILE value. + * - \%RTfmode - Takes a #RTFMODE value. + * - \%RTfoff - Takes a #RTFOFF value. + * - \%RTfp16 - Takes a #RTFAR16 value. + * - \%RTfp32 - Takes a #RTFAR32 value. + * - \%RTfp64 - Takes a #RTFAR64 value. + * - \%RTgid - Takes a #RTGID value. + * - \%RTino - Takes a #RTINODE value. + * - \%RTint - Takes a #RTINT value. + * - \%RTiop - Takes a #RTIOPORT value. + * - \%RTldrm - Takes a #RTLDRMOD value. + * - \%RTmac - Takes a #PCRTMAC pointer. + * - \%RTnaddr - Takes a #PCRTNETADDR value. + * - \%RTnaipv4 - Takes a #RTNETADDRIPV4 value. + * - \%RTnaipv6 - Takes a #PCRTNETADDRIPV6 value. + * - \%RTnthrd - Takes a #RTNATIVETHREAD value. + * - \%RTnthrd - Takes a #RTNATIVETHREAD value. + * - \%RTproc - Takes a #RTPROCESS value. + * - \%RTptr - Takes a #RTINTPTR or #RTUINTPTR value (but not void *). + * - \%RTreg - Takes a #RTCCUINTREG value. + * - \%RTsel - Takes a #RTSEL value. + * - \%RTsem - Takes a #RTSEMEVENT, #RTSEMEVENTMULTI, #RTSEMMUTEX, #RTSEMFASTMUTEX, or #RTSEMRW value. + * - \%RTsock - Takes a #RTSOCKET value. + * - \%RTthrd - Takes a #RTTHREAD value. + * - \%RTuid - Takes a #RTUID value. + * - \%RTuint - Takes a #RTUINT value. + * - \%RTunicp - Takes a #RTUNICP value. + * - \%RTutf16 - Takes a #RTUTF16 value. + * - \%RTuuid - Takes a #PCRTUUID and will print the UUID as a string. + * - \%RTxuint - Takes a #RTUINT or #RTINT value, formatting it as hex. + * - \%RGi - Takes a #RTGCINT value. + * - \%RGp - Takes a #RTGCPHYS value. + * - \%RGr - Takes a #RTGCUINTREG value. + * - \%RGu - Takes a #RTGCUINT value. + * - \%RGv - Takes a #RTGCPTR, #RTGCINTPTR or #RTGCUINTPTR value. + * - \%RGx - Takes a #RTGCUINT or #RTGCINT value, formatting it as hex. + * - \%RHi - Takes a #RTHCINT value. + * - \%RHp - Takes a #RTHCPHYS value. + * - \%RHr - Takes a #RTHCUINTREG value. + * - \%RHu - Takes a #RTHCUINT value. + * - \%RHv - Takes a #RTHCPTR, #RTHCINTPTR or #RTHCUINTPTR value. + * - \%RHx - Takes a #RTHCUINT or #RTHCINT value, formatting it as hex. + * - \%RRv - Takes a #RTRCPTR, #RTRCINTPTR or #RTRCUINTPTR value. + * - \%RCi - Takes a #RTINT value. + * - \%RCp - Takes a #RTCCPHYS value. + * - \%RCr - Takes a #RTCCUINTREG value. + * - \%RCu - Takes a #RTUINT value. + * - \%RCv - Takes a #uintptr_t, #intptr_t, void * value. + * - \%RCx - Takes a #RTUINT or #RTINT value, formatting it as hex. + * + * + * Group 2, the generic integer types which are prefered over relying on what + * bit-count a 'long', 'short', or 'long long' has on a platform. This are + * highly prefered for the [u]intXX_t kind of types: + * - \%RI[8|16|32|64] - Signed integer value of the specifed bit count. + * - \%RU[8|16|32|64] - Unsigned integer value of the specifed bit count. + * - \%RX[8|16|32|64] - Hexadecimal integer value of the specifed bit count. + * + * + * Group 3, hex dumpers and other complex stuff which requires more than simple + * formatting: + * - \%Rhxd - Takes a pointer to the memory which is to be dumped in typical + * hex format. Use the precision to specify the length, and the width to + * set the number of bytes per line. Default width and precision is 16. + * - \%RhxD - Same as \%Rhxd, except that it skips duplicate lines. + * - \%Rhxs - Takes a pointer to the memory to be displayed as a hex string, + * i.e. a series of space separated bytes formatted as two digit hex value. + * Use the precision to specify the length. Default length is 16 bytes. + * The width, if specified, is ignored. + * The space separtor can get change to a colon by + * using the ' flag, and removed entirely using \#. + * - \%RhXd - Same as \%Rhxd, but takes an additional uint64_t + * value with the memory start address/offset after + * the memory pointer. + * - \%RhXD - Same as \%RhxD, but takes an additional uint64_t + * value with the memory start address/offset after + * the memory pointer. + * - \%RhXs - Same as \%Rhxs, but takes an additional uint64_t + * value with the memory start address/offset after + * the memory pointer. + * + * - \%Rhcb - Human readable byte size formatting, using + * binary unit prefixes (GiB, MiB and such). Takes a + * 64-bit unsigned integer as input. Does one + * decimal point by default, can do 0-3 via precision + * field. No rounding when calculating fraction. + * The space flag add a space between the value and + * unit. + * - \%RhcB - Same a \%Rhcb only the 'i' is skipped in the unit. + * - \%Rhci - SI variant of \%Rhcb, fraction is rounded. + * - \%Rhub - Human readable number formatting, using + * binary unit prefixes. Takes a 64-bit unsigned + * integer as input. Does one decimal point by + * default, can do 0-3 via precision field. No + * rounding when calculating fraction. The space + * flag add a space between the value and unit. + * - \%RhuB - Same a \%Rhub only the 'i' is skipped in the unit. + * - \%Rhui - SI variant of \%Rhub, fraction is rounded. + * + * - \%Rrc - Takes an integer iprt status code as argument. Will insert the + * status code define corresponding to the iprt status code. + * - \%Rrs - Takes an integer iprt status code as argument. Will insert the + * short description of the specified status code. + * - \%Rrf - Takes an integer iprt status code as argument. Will insert the + * full description of the specified status code. + * Note! Works like \%Rrs when IN_RT_STATIC is defined (so please avoid). + * - \%Rra - Takes an integer iprt status code as argument. Will insert the + * status code define + full description. + * Note! Reduced output when IN_RT_STATIC is defined (so please avoid). + * - \%Rwc - Takes a long Windows error code as argument. Will insert the status + * code define corresponding to the Windows error code. + * - \%Rwf - Takes a long Windows error code as argument. Will insert the + * full description of the specified status code. + * Note! Works like \%Rwc when IN_RT_STATIC is defined. + * - \%Rwa - Takes a long Windows error code as argument. Will insert the + * error code define + full description. + * Note! Reduced output when IN_RT_STATIC is defined (so please avoid). + * + * - \%Rhrc - Takes a COM/XPCOM status code as argument. Will insert the status + * code define corresponding to the Windows error code. + * - \%Rhrf - Takes a COM/XPCOM status code as argument. Will insert the + * full description of the specified status code. + * Note! Works like \%Rhrc when IN_RT_STATIC is + * defined on Windows (so please avoid). + * - \%Rhra - Takes a COM/XPCOM error code as argument. Will insert the + * error code define + full description. + * Note! Reduced output when IN_RT_STATIC is defined on Windows (so please avoid). + * + * - \%Rfn - Pretty printing of a function or method. It drops the + * return code and parameter list. + * - \%Rbn - Prints the base name. For dropping the path in + * order to save space when printing a path name. + * + * - \%lRbs - Same as \%ls except inlut is big endian UTF-16. + * + * On other platforms, \%Rw? simply prints the argument in a form of 0xXXXXXXXX. + * + * + * Group 4, structure dumpers: + * - \%RDtimespec - Takes a PCRTTIMESPEC. + * + * + * Group 5, XML / HTML, JSON and URI escapers: + * - \%RMas - Takes a string pointer (const char *) and outputs + * it as an attribute value with the proper escaping. + * This typically ends up in double quotes. + * + * - \%RMes - Takes a string pointer (const char *) and outputs + * it as an element with the necessary escaping. + * + * - \%RMjs - Takes a string pointer (const char *) and outputs + * it in quotes with proper JSON escaping. + * + * - \%RMpa - Takes a string pointer (const char *) and outputs + * it percent-encoded (RFC-3986). All reserved characters + * are encoded. + * + * - \%RMpf - Takes a string pointer (const char *) and outputs + * it percent-encoded (RFC-3986), form style. This + * means '+' is used to escape space (' ') and '%2B' + * is used to escape '+'. + * + * - \%RMpp - Takes a string pointer (const char *) and outputs + * it percent-encoded (RFC-3986), path style. This + * means '/' will not be escaped. + * + * - \%RMpq - Takes a string pointer (const char *) and outputs + * it percent-encoded (RFC-3986), query style. This + * means '+' will not be escaped. + * + * + * Group 6, CPU Architecture Register dumpers: + * - \%RAx86[reg] - Takes a 64-bit register value if the register is + * 64-bit or smaller. Check the code wrt which + * registers are implemented. + * + */ + +#ifndef DECLARED_FNRTSTROUTPUT /* duplicated in iprt/log.h & errcore.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 DECLCALLBACKTYPE(size_t, FNRTSTROUTPUT,(void *pvArg, const char *pachChars, size_t cbChars)); +/** Pointer to callback function. */ +typedef FNRTSTROUTPUT *PFNRTSTROUTPUT; +#endif + +/** @name 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_THOUSAND_SEP 0x0200 +#define RTSTR_F_OBFUSCATE_PTR 0x0400 + +#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) * 8 == 32 ? RTSTR_F_32BIT \ + : sizeof(type) * 8 == 64 ? RTSTR_F_64BIT \ + : sizeof(type) * 8 == 16 ? RTSTR_F_16BIT \ + : sizeof(type) * 8 == 8 ? RTSTR_F_8BIT \ + : sizeof(type) * 8 == 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 DECLCALLBACKTYPE(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 Pointer to the format string, @see pg_rt_str_format. + * @param InArgs Argument list. + */ +RTDECL(size_t) RTStrFormatV(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput, PFNSTRFORMAT pfnFormat, void *pvArgFormat, + const char *pszFormat, va_list InArgs) RT_IPRT_FORMAT_ATTR(5, 0); + +/** + * 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 Pointer to the format string, @see pg_rt_str_format. + * @param ... Argument list. + */ +RTDECL(size_t) RTStrFormat(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput, PFNSTRFORMAT pfnFormat, void *pvArgFormat, + const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(5, 6); + +/** + * 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, RTSTR_F_XXX. + */ +RTDECL(int) RTStrFormatNumber(char *psz, uint64_t u64Value, unsigned int uiBase, signed int cchWidth, signed int cchPrecision, + unsigned int fFlags); + +/** + * Formats an unsigned 8-bit number. + * + * @returns The length of the formatted number or VERR_BUFFER_OVERFLOW. + * @param pszBuf The output buffer. + * @param cbBuf The size of the output buffer. + * @param u8Value The value to format. + * @param uiBase Number representation base. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags, RTSTR_F_XXX. + */ +RTDECL(ssize_t) RTStrFormatU8(char *pszBuf, size_t cbBuf, uint8_t u8Value, unsigned int uiBase, + signed int cchWidth, signed int cchPrecision, uint32_t fFlags); + +/** + * Formats an unsigned 16-bit number. + * + * @returns The length of the formatted number or VERR_BUFFER_OVERFLOW. + * @param pszBuf The output buffer. + * @param cbBuf The size of the output buffer. + * @param u16Value The value to format. + * @param uiBase Number representation base. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags, RTSTR_F_XXX. + */ +RTDECL(ssize_t) RTStrFormatU16(char *pszBuf, size_t cbBuf, uint16_t u16Value, unsigned int uiBase, + signed int cchWidth, signed int cchPrecision, uint32_t fFlags); + +/** + * Formats an unsigned 32-bit number. + * + * @returns The length of the formatted number or VERR_BUFFER_OVERFLOW. + * @param pszBuf The output buffer. + * @param cbBuf The size of the output buffer. + * @param u32Value The value to format. + * @param uiBase Number representation base. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags, RTSTR_F_XXX. + */ +RTDECL(ssize_t) RTStrFormatU32(char *pszBuf, size_t cbBuf, uint32_t u32Value, unsigned int uiBase, + signed int cchWidth, signed int cchPrecision, uint32_t fFlags); + +/** + * Formats an unsigned 64-bit number. + * + * @returns The length of the formatted number or VERR_BUFFER_OVERFLOW. + * @param pszBuf The output buffer. + * @param cbBuf The size of the output buffer. + * @param u64Value The value to format. + * @param uiBase Number representation base. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags, RTSTR_F_XXX. + */ +RTDECL(ssize_t) RTStrFormatU64(char *pszBuf, size_t cbBuf, uint64_t u64Value, unsigned int uiBase, + signed int cchWidth, signed int cchPrecision, uint32_t fFlags); + +/** + * Formats an unsigned 128-bit number. + * + * @returns The length of the formatted number or VERR_BUFFER_OVERFLOW. + * @param pszBuf The output buffer. + * @param cbBuf The size of the output buffer. + * @param pu128Value The value to format. + * @param uiBase Number representation base. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags, RTSTR_F_XXX. + * @remarks The current implementation is limited to base 16 and doesn't do + * width or precision and probably ignores few flags too. + */ +RTDECL(ssize_t) RTStrFormatU128(char *pszBuf, size_t cbBuf, PCRTUINT128U pu128Value, unsigned int uiBase, + signed int cchWidth, signed int cchPrecision, uint32_t fFlags); + +/** + * Formats an unsigned 256-bit number. + * + * @returns The length of the formatted number or VERR_BUFFER_OVERFLOW. + * @param pszBuf The output buffer. + * @param cbBuf The size of the output buffer. + * @param pu256Value The value to format. + * @param uiBase Number representation base. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags, RTSTR_F_XXX. + * @remarks The current implementation is limited to base 16 and doesn't do + * width or precision and probably ignores few flags too. + */ +RTDECL(ssize_t) RTStrFormatU256(char *pszBuf, size_t cbBuf, PCRTUINT256U pu256Value, unsigned int uiBase, + signed int cchWidth, signed int cchPrecision, uint32_t fFlags); + +/** + * Formats an unsigned 512-bit number. + * + * @returns The length of the formatted number or VERR_BUFFER_OVERFLOW. + * @param pszBuf The output buffer. + * @param cbBuf The size of the output buffer. + * @param pu512Value The value to format. + * @param uiBase Number representation base. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags, RTSTR_F_XXX. + * @remarks The current implementation is limited to base 16 and doesn't do + * width or precision and probably ignores few flags too. + */ +RTDECL(ssize_t) RTStrFormatU512(char *pszBuf, size_t cbBuf, PCRTUINT512U pu512Value, unsigned int uiBase, + signed int cchWidth, signed int cchPrecision, uint32_t fFlags); + +/** + * Formats an 32-bit extended floating point number. + * + * @returns The length of the formatted number or VERR_BUFFER_OVERFLOW. + * @param pszBuf The output buffer. + * @param cbBuf The size of the output buffer. + * @param pr32Value The value to format. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags, RTSTR_F_XXX. + */ +RTDECL(ssize_t) RTStrFormatR32(char *pszBuf, size_t cbBuf, PCRTFLOAT32U pr32Value, signed int cchWidth, + signed int cchPrecision, uint32_t fFlags); + +/** + * Formats an 64-bit extended floating point number. + * + * @returns The length of the formatted number or VERR_BUFFER_OVERFLOW. + * @param pszBuf The output buffer. + * @param cbBuf The size of the output buffer. + * @param pr64Value The value to format. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags, RTSTR_F_XXX. + */ +RTDECL(ssize_t) RTStrFormatR64(char *pszBuf, size_t cbBuf, PCRTFLOAT64U pr64Value, signed int cchWidth, + signed int cchPrecision, uint32_t fFlags); + +#if !defined(__IBMCPP__) && !defined(__IBMC__) + +/** + * Formats an 80-bit extended floating point number. + * + * @returns The length of the formatted number or VERR_BUFFER_OVERFLOW. + * @param pszBuf The output buffer. + * @param cbBuf The size of the output buffer. + * @param pr80Value The value to format. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags, RTSTR_F_XXX. + */ +RTDECL(ssize_t) RTStrFormatR80(char *pszBuf, size_t cbBuf, PCRTFLOAT80U pr80Value, signed int cchWidth, + signed int cchPrecision, uint32_t fFlags); + +/** + * Formats an 80-bit extended floating point number, version 2. + * + * @returns The length of the formatted number or VERR_BUFFER_OVERFLOW. + * @param pszBuf The output buffer. + * @param cbBuf The size of the output buffer. + * @param pr80Value The value to format. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags, RTSTR_F_XXX. + */ +RTDECL(ssize_t) RTStrFormatR80u2(char *pszBuf, size_t cbBuf, PCRTFLOAT80U2 pr80Value, signed int cchWidth, + signed int cchPrecision, uint32_t fFlags); + +#endif /* uint16_t bitfields doesn't work */ + + +/** + * Callback for formatting a type. + * + * This is registered using the RTStrFormatTypeRegister function and will + * be called during string formatting to handle the specified %R[type]. + * The argument for this format type is assumed to be a pointer and it's + * passed in the @a pvValue argument. + * + * @returns Length of the formatted output. + * @param pfnOutput Output worker. + * @param pvArgOutput Argument to the output worker. + * @param pszType The type name. + * @param pvValue The argument value. + * @param cchWidth Width. + * @param cchPrecision Precision. + * @param fFlags Flags (NTFS_*). + * @param pvUser The user argument. + */ +typedef DECLCALLBACKTYPE(size_t, FNRTSTRFORMATTYPE,(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput, + const char *pszType, void const *pvValue, + int cchWidth, int cchPrecision, unsigned fFlags, + void *pvUser)); +/** Pointer to a FNRTSTRFORMATTYPE. */ +typedef FNRTSTRFORMATTYPE *PFNRTSTRFORMATTYPE; + + +/** + * Register a format handler for a type. + * + * The format handler is used to handle '%R[type]' format types, where the argument + * in the vector is a pointer value (a bit restrictive, but keeps it simple). + * + * The caller must ensure that no other thread will be making use of any of + * the dynamic formatting type facilities simultaneously with this call. + * + * @returns IPRT status code. + * @retval VINF_SUCCESS on success. + * @retval VERR_ALREADY_EXISTS if the type has already been registered. + * @retval VERR_TOO_MANY_OPEN_FILES if all the type slots has been allocated already. + * + * @param pszType The type name. + * @param pfnHandler The handler address. See FNRTSTRFORMATTYPE for details. + * @param pvUser The user argument to pass to the handler. See RTStrFormatTypeSetUser + * for how to update this later. + */ +RTDECL(int) RTStrFormatTypeRegister(const char *pszType, PFNRTSTRFORMATTYPE pfnHandler, void *pvUser); + +/** + * Deregisters a format type. + * + * The caller must ensure that no other thread will be making use of any of + * the dynamic formatting type facilities simultaneously with this call. + * + * @returns IPRT status code. + * @retval VINF_SUCCESS on success. + * @retval VERR_FILE_NOT_FOUND if not found. + * + * @param pszType The type to deregister. + */ +RTDECL(int) RTStrFormatTypeDeregister(const char *pszType); + +/** + * Sets the user argument for a type. + * + * This can be used if a user argument needs relocating in GC. + * + * @returns IPRT status code. + * @retval VINF_SUCCESS on success. + * @retval VERR_FILE_NOT_FOUND if not found. + * + * @param pszType The type to update. + * @param pvUser The new user argument value. + */ +RTDECL(int) RTStrFormatTypeSetUser(const char *pszType, void *pvUser); + + +/** + * String printf. + * + * @returns The length of the returned string (in pszBuffer) excluding the + * terminator. + * @param pszBuffer Output buffer. + * @param cchBuffer Size of the output buffer. + * @param pszFormat Pointer to the format string, @see pg_rt_str_format. + * @param args The format argument. + * + * @deprecated Use RTStrPrintf2V! Problematic return value on overflow. + */ +RTDECL(size_t) RTStrPrintfV(char *pszBuffer, size_t cchBuffer, const char *pszFormat, va_list args) RT_IPRT_FORMAT_ATTR(3, 0); + +/** + * String printf. + * + * @returns The length of the returned string (in pszBuffer) excluding the + * terminator. + * @param pszBuffer Output buffer. + * @param cchBuffer Size of the output buffer. + * @param pszFormat Pointer to the format string, @see pg_rt_str_format. + * @param ... The format argument. + * + * @deprecated Use RTStrPrintf2! Problematic return value on overflow. + */ +RTDECL(size_t) RTStrPrintf(char *pszBuffer, size_t cchBuffer, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(3, 4); + +/** + * String printf with custom formatting. + * + * @returns The length of the returned string (in pszBuffer) excluding the + * terminator. + * @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 Pointer to the format string, @see pg_rt_str_format. + * @param args The format argument. + * + * @deprecated Use RTStrPrintf2ExV! Problematic return value on overflow. + */ +RTDECL(size_t) RTStrPrintfExV(PFNSTRFORMAT pfnFormat, void *pvArg, char *pszBuffer, size_t cchBuffer, + const char *pszFormat, va_list args) RT_IPRT_FORMAT_ATTR(5, 0); + +/** + * String printf with custom formatting. + * + * @returns The length of the returned string (in pszBuffer) excluding the + * terminator. + * @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 Pointer to the format string, @see pg_rt_str_format. + * @param ... The format argument. + * + * @deprecated Use RTStrPrintf2Ex! Problematic return value on overflow. + */ +RTDECL(size_t) RTStrPrintfEx(PFNSTRFORMAT pfnFormat, void *pvArg, char *pszBuffer, size_t cchBuffer, + const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(5, 6); + +/** + * String printf, version 2. + * + * @returns On success, positive count of formatted character excluding the + * terminator. On buffer overflow, negative number giving the required + * buffer size (including terminator char). + * + * @param pszBuffer Output buffer. + * @param cbBuffer Size of the output buffer. + * @param pszFormat Pointer to the format string, @see pg_rt_str_format. + * @param args The format argument. + */ +RTDECL(ssize_t) RTStrPrintf2V(char *pszBuffer, size_t cbBuffer, const char *pszFormat, va_list args) RT_IPRT_FORMAT_ATTR(3, 0); + +/** + * String printf, version 2. + * + * @returns On success, positive count of formatted character excluding the + * terminator. On buffer overflow, negative number giving the required + * buffer size (including terminator char). + * + * @param pszBuffer Output buffer. + * @param cbBuffer Size of the output buffer. + * @param pszFormat Pointer to the format string, @see pg_rt_str_format. + * @param ... The format argument. + */ +RTDECL(ssize_t) RTStrPrintf2(char *pszBuffer, size_t cbBuffer, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(3, 4); + +/** + * String printf with custom formatting, version 2. + * + * @returns On success, positive count of formatted character excluding the + * terminator. On buffer overflow, negative number giving the required + * buffer size (including terminator char). + * + * @param pfnFormat Pointer to handler function for the custom formats. + * @param pvArg Argument to the pfnFormat function. + * @param pszBuffer Output buffer. + * @param cbBuffer Size of the output buffer. + * @param pszFormat Pointer to the format string, @see pg_rt_str_format. + * @param args The format argument. + */ +RTDECL(ssize_t) RTStrPrintf2ExV(PFNSTRFORMAT pfnFormat, void *pvArg, char *pszBuffer, size_t cbBuffer, + const char *pszFormat, va_list args) RT_IPRT_FORMAT_ATTR(5, 0); + +/** + * String printf with custom formatting, version 2. + * + * @returns On success, positive count of formatted character excluding the + * terminator. On buffer overflow, negative number giving the required + * buffer size (including terminator char). + * + * @param pfnFormat Pointer to handler function for the custom formats. + * @param pvArg Argument to the pfnFormat function. + * @param pszBuffer Output buffer. + * @param cbBuffer Size of the output buffer. + * @param pszFormat Pointer to the format string, @see pg_rt_str_format. + * @param ... The format argument. + */ +RTDECL(ssize_t) RTStrPrintf2Ex(PFNSTRFORMAT pfnFormat, void *pvArg, char *pszBuffer, size_t cbBuffer, + const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(5, 6); + +/** + * Allocating string printf (default tag). + * + * @returns The length of the string in the returned *ppszBuffer excluding the + * terminator. + * @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 Pointer to the format string, @see pg_rt_str_format. + * @param args The format argument. + */ +#define RTStrAPrintfV(ppszBuffer, pszFormat, args) RTStrAPrintfVTag((ppszBuffer), (pszFormat), (args), RTSTR_TAG) + +/** + * Allocating string printf (custom tag). + * + * @returns The length of the string in the returned *ppszBuffer excluding the + * terminator. + * @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 Pointer to the format string, @see pg_rt_str_format. + * @param args The format argument. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(int) RTStrAPrintfVTag(char **ppszBuffer, const char *pszFormat, va_list args, const char *pszTag) RT_IPRT_FORMAT_ATTR(2, 0); + +/** + * Allocating string printf. + * + * @returns The length of the string in the returned *ppszBuffer excluding the + * terminator. + * @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 Pointer to the format string, @see pg_rt_str_format. + * @param ... The format argument. + */ +DECLINLINE(int) RT_IPRT_FORMAT_ATTR(2, 3) RTStrAPrintf(char **ppszBuffer, const char *pszFormat, ...) +{ + int cbRet; + va_list va; + va_start(va, pszFormat); + cbRet = RTStrAPrintfVTag(ppszBuffer, pszFormat, va, RTSTR_TAG); + va_end(va); + return cbRet; +} + +/** + * Allocating string printf (custom tag). + * + * @returns The length of the string in the returned *ppszBuffer excluding the + * terminator. + * @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 pszTag Allocation tag used for statistics and such. + * @param pszFormat Pointer to the format string, @see pg_rt_str_format. + * @param ... The format argument. + */ +DECLINLINE(int) RT_IPRT_FORMAT_ATTR(3, 4) RTStrAPrintfTag(char **ppszBuffer, const char *pszTag, const char *pszFormat, ...) +{ + int cbRet; + va_list va; + va_start(va, pszFormat); + cbRet = RTStrAPrintfVTag(ppszBuffer, pszFormat, va, pszTag); + va_end(va); + return cbRet; +} + +/** + * Allocating string printf, version 2. + * + * @returns Formatted string. Use RTStrFree() to free it. NULL when out of + * memory. + * @param pszFormat Pointer to the format string, @see pg_rt_str_format. + * @param args The format argument. + */ +#define RTStrAPrintf2V(pszFormat, args) RTStrAPrintf2VTag((pszFormat), (args), RTSTR_TAG) + +/** + * Allocating string printf, version 2. + * + * @returns Formatted string. Use RTStrFree() to free it. NULL when out of + * memory. + * @param pszFormat Pointer to the format string, @see pg_rt_str_format. + * @param args The format argument. + * @param pszTag Allocation tag used for statistics and such. + */ +RTDECL(char *) RTStrAPrintf2VTag(const char *pszFormat, va_list args, const char *pszTag) RT_IPRT_FORMAT_ATTR(1, 0); + +/** + * Allocating string printf, version 2 (default tag). + * + * @returns Formatted string. Use RTStrFree() to free it. NULL when out of + * memory. + * @param pszFormat Pointer to the format string, @see pg_rt_str_format. + * @param ... The format argument. + */ +DECLINLINE(char *) RT_IPRT_FORMAT_ATTR(1, 2) RTStrAPrintf2(const char *pszFormat, ...) +{ + char *pszRet; + va_list va; + va_start(va, pszFormat); + pszRet = RTStrAPrintf2VTag(pszFormat, va, RTSTR_TAG); + va_end(va); + return pszRet; +} + +/** + * Allocating string printf, version 2 (custom tag). + * + * @returns Formatted string. Use RTStrFree() to free it. NULL when out of + * memory. + * @param pszTag Allocation tag used for statistics and such. + * @param pszFormat Pointer to the format string, @see pg_rt_str_format. + * @param ... The format argument. + */ +DECLINLINE(char *) RT_IPRT_FORMAT_ATTR(2, 3) RTStrAPrintf2Tag(const char *pszTag, const char *pszFormat, ...) +{ + char *pszRet; + va_list va; + va_start(va, pszFormat); + pszRet = RTStrAPrintf2VTag(pszFormat, va, pszTag); + va_end(va); + return pszRet; +} + +/** + * 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); + +/** + * 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 pszDst The destination buffer. + * @param cbDst The size of the destination buffer (in bytes). + * @param pszSrc The source string. NULL is not OK. + */ +RTDECL(int) RTStrCopy(char *pszDst, size_t cbDst, 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 pszDst The destination buffer. + * @param cbDst The size of the destination buffer (in bytes). + * @param pszSrc The source string. NULL is not OK. + * @param cchSrcMax The maximum number of chars (not code points) to + * copy from the source string, not counting the + * terminator as usual. + */ +RTDECL(int) RTStrCopyEx(char *pszDst, size_t cbDst, const char *pszSrc, size_t cchSrcMax); + +/** + * String copy with overflow handling and buffer advancing. + * + * @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 ppszDst Pointer to the destination buffer pointer. + * This will be advanced to the end of the copied + * bytes (points at the terminator). This is also + * updated on overflow. + * @param pcbDst Pointer to the destination buffer size + * variable. This will be updated in accord with + * the buffer pointer. + * @param pszSrc The source string. NULL is not OK. + */ +RTDECL(int) RTStrCopyP(char **ppszDst, size_t *pcbDst, 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 ppszDst Pointer to the destination buffer pointer. + * This will be advanced to the end of the copied + * bytes (points at the terminator). This is also + * updated on overflow. + * @param pcbDst Pointer to the destination buffer size + * variable. This will be updated in accord with + * the buffer pointer. + * @param pszSrc The source string. NULL is not OK. + * @param cchSrcMax The maximum number of chars (not code points) to + * copy from the source string, not counting the + * terminator as usual. + */ +RTDECL(int) RTStrCopyPEx(char **ppszDst, size_t *pcbDst, const char *pszSrc, size_t cchSrcMax); + +/** + * 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 pszDst The destination buffer. + * @param cbDst The size of the destination buffer (in bytes). + * @param pszSrc The source string. NULL is not OK. + */ +RTDECL(int) RTStrCat(char *pszDst, size_t cbDst, 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 pszDst The destination buffer. + * @param cbDst The size of the destination buffer (in bytes). + * @param pszSrc The source string. NULL is not OK. + * @param cchSrcMax The maximum number of chars (not code points) to + * copy from the source string, not counting the + * terminator as usual. + */ +RTDECL(int) RTStrCatEx(char *pszDst, size_t cbDst, const char *pszSrc, size_t cchSrcMax); + +/** + * 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 ppszDst Pointer to the destination buffer pointer. + * This will be advanced to the end of the copied + * bytes (points at the terminator). This is also + * updated on overflow. + * @param pcbDst Pointer to the destination buffer size + * variable. This will be updated in accord with + * the buffer pointer. + * @param pszSrc The source string. NULL is not OK. + */ +RTDECL(int) RTStrCatP(char **ppszDst, size_t *pcbDst, const char *pszSrc); + +/** + * String concatenation with overflow handling and buffer advancing. + * + * @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 ppszDst Pointer to the destination buffer pointer. + * This will be advanced to the end of the copied + * bytes (points at the terminator). This is also + * updated on overflow. + * @param pcbDst Pointer to the destination buffer size + * variable. This will be updated in accord with + * the buffer pointer. + * @param pszSrc The source string. NULL is not OK. + * @param cchSrcMax The maximum number of chars (not code points) to + * copy from the source string, not counting the + * terminator as usual. + */ +RTDECL(int) RTStrCatPEx(char **ppszDst, size_t *pcbDst, const char *pszSrc, size_t cchSrcMax); + +/** + * Performs a case sensitive string compare between two UTF-8 strings. + * + * Encoding errors are ignored by the current implementation. So, the only + * difference between this and the CRT strcmp function is the handling of + * NULL arguments. + * + * @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. Null is allowed. + * @param psz2 Second UTF-8 string. Null is allowed. + */ +RTDECL(int) RTStrCmp(const char *psz1, const char *psz2); + +/** + * Performs a case sensitive string compare between two UTF-8 strings, given + * a maximum string length. + * + * Encoding errors are ignored by the current implementation. So, the only + * difference between this and the CRT strncmp function is the handling of + * NULL arguments. + * + * @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. Null is allowed. + * @param psz2 Second UTF-8 string. Null is allowed. + * @param cchMax The maximum string length + */ +RTDECL(int) RTStrNCmp(const char *psz1, const char *psz2, size_t cchMax); + +/** + * 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. + * + * The result is the difference between the mismatching codepoints after they + * both have been lower cased. + * + * If the string encoding is invalid the function will assert (strict builds) + * and use RTStrCmp for the remainder of the string. + * + * @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. Null is allowed. + * @param psz2 Second UTF-8 string. Null is allowed. + */ +RTDECL(int) RTStrICmp(const char *psz1, const char *psz2); + +/** + * Performs a case insensitive string compare between two UTF-8 strings, given a + * maximum string length. + * + * 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. + * + * The result is the difference between the mismatching codepoints after they + * both have been lower cased. + * + * If the string encoding is invalid the function will assert (strict builds) + * and use RTStrNCmp for the remainder of the string. + * + * @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. Null is allowed. + * @param psz2 Second UTF-8 string. Null is allowed. + * @param cchMax Maximum string length + */ +RTDECL(int) RTStrNICmp(const char *psz1, const char *psz2, size_t cchMax); + +/** + * Performs a case insensitive string compare between a UTF-8 string and a 7-bit + * ASCII string. + * + * This is potentially faster than RTStrICmp and drags in less dependencies. It + * is really handy for hardcoded inputs. + * + * If the string encoding is invalid the function will assert (strict builds) + * and use RTStrCmp for the remainder of the string. + * + * @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. Null is allowed. + * @param psz2 Second string, 7-bit ASCII. Null is allowed. + * @sa RTStrICmp, RTUtf16ICmpAscii + */ +RTDECL(int) RTStrICmpAscii(const char *psz1, const char *psz2); + +/** + * Performs a case insensitive string compare between a UTF-8 string and a 7-bit + * ASCII string, given a maximum string length. + * + * This is potentially faster than RTStrNICmp and drags in less dependencies. + * It is really handy for hardcoded inputs. + * + * If the string encoding is invalid the function will assert (strict builds) + * and use RTStrNCmp for the remainder of the string. + * + * @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. Null is allowed. + * @param psz2 Second string, 7-bit ASCII. Null is allowed. + * @param cchMax Maximum string length + * @sa RTStrNICmp, RTUtf16NICmpAscii + */ +RTDECL(int) RTStrNICmpAscii(const char *psz1, const char *psz2, size_t cchMax); + +/** + * Checks whether @a pszString starts with @a pszStart. + * + * @returns true / false. + * @param pszString The string to check. + * @param pszStart The start string to check for. + */ +RTDECL(bool) RTStrStartsWith(const char *pszString, const char *pszStart); + +/** + * Checks whether @a pszString starts with @a pszStart, case insensitive. + * + * @returns true / false. + * @param pszString The string to check. + * @param pszStart The start string to check for. + */ +RTDECL(bool) RTStrIStartsWith(const char *pszString, const char *pszStart); + +/** + * Splits a string buffer with a given separator into separate strings. + * If no separators are found, no strings are returned. Consequtive separators will be skipped. + * + * @returns iprt status code. + * @param pcszStrings String buffer to split. + * @param cbStrings Size (in bytes) of string buffer to split, including terminator. + * @param pcszSeparator Separator to use / find for splitting strings. + * @param ppapszStrings Where to return the allocated string array on success. Needs to be free'd by the caller. + * @param pcStrings Where to return the number of split strings in \a ppapszStrings. + */ +RTDECL(int) RTStrSplit(const char *pcszStrings, size_t cbStrings, + const char *pcszSeparator, char ***ppapszStrings, size_t *pcStrings); + +/** + * Locates a case sensitive substring. + * + * If any of the two strings are NULL, then NULL is returned. If the needle is + * an empty string, then the haystack is returned (i.e. matches anything). + * + * @returns Pointer to the first occurrence of the substring if found, NULL if + * not. + * + * @param pszHaystack The string to search. + * @param pszNeedle The substring to search for. + * + * @remarks The difference between this and strstr is the handling of NULL + * pointers. + */ +RTDECL(char *) RTStrStr(const char *pszHaystack, const char *pszNeedle); + +/** + * Locates a case insensitive substring. + * + * If any of the two strings are NULL, then NULL is returned. If the needle is + * an empty string, then the haystack is returned (i.e. matches anything). + * + * @returns Pointer to the first occurrence of the substring if found, NULL if + * not. + * + * @param pszHaystack The string to search. + * @param pszNeedle The substring to search for. + * + */ +RTDECL(char *) RTStrIStr(const char *pszHaystack, const char *pszNeedle); + +/** + * Converts the string to lower case. + * + * @returns Pointer to the converted string. + * @param psz The string to convert. + */ +RTDECL(char *) RTStrToLower(char *psz); + +/** + * Converts the string to upper case. + * + * @returns Pointer to the converted string. + * @param psz The string to convert. + */ +RTDECL(char *) RTStrToUpper(char *psz); + +/** + * Checks if the string is case foldable, i.e. whether it would change if + * subject to RTStrToLower or RTStrToUpper. + * + * @returns true / false + * @param psz The string in question. + */ +RTDECL(bool) RTStrIsCaseFoldable(const char *psz); + +/** + * Checks if the string is upper cased (no lower case chars in it). + * + * @returns true / false + * @param psz The string in question. + */ +RTDECL(bool) RTStrIsUpperCased(const char *psz); + +/** + * Checks if the string is lower cased (no upper case chars in it). + * + * @returns true / false + * @param psz The string in question. + */ +RTDECL(bool) RTStrIsLowerCased(const char *psz); + +/** + * Find the length of a zero-terminated byte string, given + * a max string length. + * + * See also RTStrNLenEx. + * + * @returns The string length or cbMax. The returned length does not include + * the zero terminator if it was found. + * + * @param pszString The string. + * @param cchMax The max string length. + */ +RTDECL(size_t) RTStrNLen(const char *pszString, size_t cchMax); + +/** + * Find the length of a zero-terminated byte string, given + * a max string length. + * + * See also RTStrNLen. + * + * @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 cchMax was reached. + * + * @param pszString The string. + * @param cchMax The max string length. + * @param pcch Where to store the string length excluding the + * terminator. This is set to cchMax if the terminator + * isn't found. + */ +RTDECL(int) RTStrNLenEx(const char *pszString, size_t cchMax, size_t *pcch); + +/** The maximum size argument of a memchr call. */ +#define RTSTR_MEMCHR_MAX ((~(size_t)0 >> 1) - 15) + +/** + * 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 pszString The string. + * @param cchMax The max string length. RTSTR_MAX is fine. + */ +RTDECL(char *) RTStrEnd(char const *pszString, size_t cchMax); + +/** + * Finds the offset at which a simple character first occurs in a string. + * + * @returns The offset of the first occurence or the terminator offset. + * @param pszHaystack The string to search. + * @param chNeedle The character to search for. + */ +DECLINLINE(size_t) RTStrOffCharOrTerm(const char *pszHaystack, char chNeedle) +{ + const char *psz = pszHaystack; + char ch; + while ( (ch = *psz) != chNeedle + && ch != '\0') + psz++; + return (size_t)(psz - pszHaystack); +} + +/** + * Matches a simple string pattern. + * + * @returns true if the string matches the pattern, otherwise false. + * + * @param pszPattern The pattern. Special chars are '*' and '?', where the + * asterisk matches zero or more characters and question + * mark matches exactly one character. + * @param pszString The string to match against the pattern. + */ +RTDECL(bool) RTStrSimplePatternMatch(const char *pszPattern, const char *pszString); + +/** + * Matches a simple string pattern, neither which needs to be zero terminated. + * + * This is identical to RTStrSimplePatternMatch except that you can optionally + * specify the length of both the pattern and the string. The function will + * stop when it hits a string terminator or either of the lengths. + * + * @returns true if the string matches the pattern, otherwise false. + * + * @param pszPattern The pattern. Special chars are '*' and '?', where the + * asterisk matches zero or more characters and question + * mark matches exactly one character. + * @param cchPattern The pattern length. Pass RTSTR_MAX if you don't know the + * length and wish to stop at the string terminator. + * @param pszString The string to match against the pattern. + * @param cchString The string length. Pass RTSTR_MAX if you don't know the + * length and wish to match up to the string terminator. + */ +RTDECL(bool) RTStrSimplePatternNMatch(const char *pszPattern, size_t cchPattern, + const char *pszString, size_t cchString); + +/** + * Matches multiple patterns against a string. + * + * The patterns are separated by the pipe character (|). + * + * @returns true if the string matches the pattern, otherwise false. + * + * @param pszPatterns The patterns. + * @param cchPatterns The lengths of the patterns to use. Pass RTSTR_MAX to + * stop at the terminator. + * @param pszString The string to match against the pattern. + * @param cchString The string length. Pass RTSTR_MAX stop stop at the + * terminator. + * @param poffPattern Offset into the patterns string of the patttern that + * matched. If no match, this will be set to RTSTR_MAX. + * This is optional, NULL is fine. + */ +RTDECL(bool) RTStrSimplePatternMultiMatch(const char *pszPatterns, size_t cchPatterns, + const char *pszString, size_t cchString, + size_t *poffPattern); + +/** + * Compares two version strings RTStrICmp fashion. + * + * The version string is split up into sections at punctuation, spaces, + * underscores, dashes and plus signs. The sections are then split up into + * numeric and string sub-sections. Finally, the sub-sections are compared + * in a numeric or case insesntivie fashion depending on what they are. + * + * The following strings are considered to be equal: "1.0.0", "1.00.0", "1.0", + * "1". These aren't: "1.0.0r993", "1.0", "1.0r993", "1.0_Beta3", "1.1" + * + * @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 pszVer1 First version string to compare. + * @param pszVer2 Second version string to compare first version with. + */ +RTDECL(int) RTStrVersionCompare(const char *pszVer1, const char *pszVer2); + + +/** @defgroup rt_str_conv String To/From Number Conversions + * @{ */ + +/** + * Converts a string representation of a number to a 64-bit unsigned number. + * + * @returns iprt status code. + * Warnings are used to indicate conversion problems. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_NEGATIVE_UNSIGNED + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param ppszNext Where to store the pointer to the first char + * following the number. (Optional) + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pu64 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToUInt64Ex(const char *pszValue, char **ppszNext, unsigned uBaseAndMaxLen, uint64_t *pu64); + +/** + * Converts a string representation of a number to a 64-bit unsigned number, + * making sure the full string is converted. + * + * @returns iprt status code. + * Warnings are used to indicate conversion problems. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_NEGATIVE_UNSIGNED + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * @retval VERR_TRAILING_SPACES + * @retval VERR_TRAILING_CHARS + * + * @param pszValue Pointer to the string value. + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pu64 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToUInt64Full(const char *pszValue, unsigned uBaseAndMaxLen, 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. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_NEGATIVE_UNSIGNED + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param ppszNext Where to store the pointer to the first char + * following the number. (Optional) + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pu32 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToUInt32Ex(const char *pszValue, char **ppszNext, unsigned uBaseAndMaxLen, uint32_t *pu32); + +/** + * Converts a string representation of a number to a 32-bit unsigned number, + * making sure the full string is converted. + * + * @returns iprt status code. + * Warnings are used to indicate conversion problems. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_NEGATIVE_UNSIGNED + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * @retval VERR_TRAILING_SPACES + * @retval VERR_TRAILING_CHARS + * + * @param pszValue Pointer to the string value. + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pu32 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToUInt32Full(const char *pszValue, unsigned uBaseAndMaxLen, uint32_t *pu32); + +/** + * Converts a string representation of a number to a 32-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. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_NEGATIVE_UNSIGNED + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param ppszNext Where to store the pointer to the first char + * following the number. (Optional) + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pu16 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToUInt16Ex(const char *pszValue, char **ppszNext, unsigned uBaseAndMaxLen, uint16_t *pu16); + +/** + * Converts a string representation of a number to a 16-bit unsigned number, + * making sure the full string is converted. + * + * @returns iprt status code. + * Warnings are used to indicate conversion problems. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_NEGATIVE_UNSIGNED + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * @retval VERR_TRAILING_SPACES + * @retval VERR_TRAILING_CHARS + * + * @param pszValue Pointer to the string value. + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pu16 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToUInt16Full(const char *pszValue, unsigned uBaseAndMaxLen, 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. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_NEGATIVE_UNSIGNED + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param ppszNext Where to store the pointer to the first char + * following the number. (Optional) + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pu8 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToUInt8Ex(const char *pszValue, char **ppszNext, unsigned uBaseAndMaxLen, uint8_t *pu8); + +/** + * Converts a string representation of a number to a 8-bit unsigned number, + * making sure the full string is converted. + * + * @returns iprt status code. + * Warnings are used to indicate conversion problems. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_NEGATIVE_UNSIGNED + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * @retval VERR_TRAILING_SPACES + * @retval VERR_TRAILING_CHARS + * + * @param pszValue Pointer to the string value. + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pu8 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToUInt8Full(const char *pszValue, unsigned uBaseAndMaxLen, 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. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param ppszNext Where to store the pointer to the first char + * following the number. (Optional) + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pi64 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToInt64Ex(const char *pszValue, char **ppszNext, unsigned uBaseAndMaxLen, int64_t *pi64); + +/** + * Converts a string representation of a number to a 64-bit signed number, + * making sure the full string is converted. + * + * @returns iprt status code. + * Warnings are used to indicate conversion problems. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VINF_SUCCESS + * @retval VERR_TRAILING_CHARS + * @retval VERR_TRAILING_SPACES + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pi64 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToInt64Full(const char *pszValue, unsigned uBaseAndMaxLen, 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. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param ppszNext Where to store the pointer to the first char + * following the number. (Optional) + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pi32 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToInt32Ex(const char *pszValue, char **ppszNext, unsigned uBaseAndMaxLen, int32_t *pi32); + +/** + * Converts a string representation of a number to a 32-bit signed number, + * making sure the full string is converted. + * + * @returns iprt status code. + * Warnings are used to indicate conversion problems. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VINF_SUCCESS + * @retval VERR_TRAILING_CHARS + * @retval VERR_TRAILING_SPACES + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pi32 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToInt32Full(const char *pszValue, unsigned uBaseAndMaxLen, 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. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param ppszNext Where to store the pointer to the first char + * following the number. (Optional) + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pi16 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToInt16Ex(const char *pszValue, char **ppszNext, unsigned uBaseAndMaxLen, int16_t *pi16); + +/** + * Converts a string representation of a number to a 16-bit signed number, + * making sure the full string is converted. + * + * @returns iprt status code. + * Warnings are used to indicate conversion problems. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VINF_SUCCESS + * @retval VERR_TRAILING_CHARS + * @retval VERR_TRAILING_SPACES + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pi16 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToInt16Full(const char *pszValue, unsigned uBaseAndMaxLen, 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. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * @retval VINF_SUCCESS + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param ppszNext Where to store the pointer to the first char + * following the number. (Optional) + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pi8 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToInt8Ex(const char *pszValue, char **ppszNext, unsigned uBaseAndMaxLen, int8_t *pi8); + +/** + * Converts a string representation of a number to a 8-bit signed number, + * making sure the full string is converted. + * + * @returns iprt status code. + * Warnings are used to indicate conversion problems. + * @retval VWRN_NUMBER_TOO_BIG + * @retval VINF_SUCCESS + * @retval VERR_TRAILING_CHARS + * @retval VERR_TRAILING_SPACES + * @retval VERR_NO_DIGITS + * + * @param pszValue Pointer to the string value. + * @param uBaseAndMaxLen The low byte is the base of the representation, the + * upper 24 bits are the max length to parse. If the base + * is zero the function will look for known prefixes before + * defaulting to 10. A max length of zero means no length + * restriction. + * @param pi8 Where to store the converted number. (optional) + */ +RTDECL(int) RTStrToInt8Full(const char *pszValue, unsigned uBaseAndMaxLen, 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); + + +/** + * Converts a string to long double floating point, extended edition. + * + * Please note that long double can be double precision, extended precision, or + * quad precision floating point depending on the platform and architecture. See + * RT_COMPILER_WITH_128BIT_LONG_DOUBLE and RT_COMPILER_WITH_80BIT_LONG_DOUBLE. + * + * @returns IPRT status code. + * @retval VERR_NO_DIGITS if no valid digits found. + * @retval VWRN_FLOAT_UNDERFLOW on underflow with denormal/subnormal return + * value + * @retval VERR_FLOAT_UNDERFLOW on underflow, value set to +/- zero. + * @retval VERR_FLOAT_OVERFLOW on overflow, value set to +/- infinity. + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * + * @param pszValue The string to parse. + * @param ppszNext Where to store the pointer to the first char following + * the number. Optional. + * @param cchMax Max number of character to parse. Zero means unlimited. + * @param plrd Where to return the number. Optional. + * + * @note This code isn't entirely perfect yet. It could exhibit rounding + * differences compared to strtold & the compiler, and extreme value + * may overflow/underflow prematurely depending on the build config. + */ +RTDECL(int) RTStrToLongDoubleEx(const char *pszValue, char **ppszNext, size_t cchMax, long double *plrd); + +/** + * Converts a string to double precision floating point, extended edition. + * + * @returns IPRT status code. + * @retval VERR_NO_DIGITS if no valid digits found. + * @retval VWRN_FLOAT_UNDERFLOW on underflow with denormal/subnormal return + * value + * @retval VERR_FLOAT_UNDERFLOW on underflow, value set to +/- zero. + * @retval VERR_FLOAT_OVERFLOW on overflow, value set to +/- infinity. + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * + * @param pszValue The string to parse. + * @param ppszNext Where to store the pointer to the first char following + * the number. Optional. + * @param cchMax Max number of character to parse. Zero means unlimited. + * @param prd Where to return the number. Optional. + * + * @note This code isn't entirely perfect yet. It could exhibit rounding + * differences compared to strtold & the compiler, and extreme value + * may overflow/underflow prematurely depending on the build config. + */ +RTDECL(int) RTStrToDoubleEx(const char *pszValue, char **ppszNext, size_t cchMax, double *prd); + +/** + * Converts a string to single precision floating point, extended edition. + * + * @returns IPRT status code. + * @retval VERR_NO_DIGITS if no valid digits found. + * @retval VWRN_FLOAT_UNDERFLOW on underflow with denormal/subnormal return + * value + * @retval VERR_FLOAT_UNDERFLOW on underflow, value set to +/- zero. + * @retval VERR_FLOAT_OVERFLOW on overflow, value set to +/- infinity. + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * + * @param pszValue The string to parse. + * @param ppszNext Where to store the pointer to the first char following + * the number. Optional. + * @param cchMax Max number of character to parse. Zero means unlimited. + * @param pr Where to return the number. Optional. + * + * @note This code isn't entirely perfect yet. It could exhibit rounding + * differences compared to strtold & the compiler, and extreme value + * may overflow/underflow prematurely depending on the build config. + */ +RTDECL(int) RTStrToFloatEx(const char *pszValue, char **ppszNext, size_t cchMax, float *pr); + + +/** + * Gets a long double NaN. + * + * @returns NaN value. + * @param pszTag Optional NaN tag for modifying the NaN value. We + * recognizes a string of hex digits for inserting into the + * fraction part. This may be followed 'quiet' or + * 'signaling', ignoring case and requiring at only the + * first character. The two components may be separated by + * zero or more '_' characters. Any other stuff in the tag + * will be ignored. + * + * If the tag is empty or we cannot grok any of it, we'll + * return a default quiet NaN. + * @param fPositive Whether the NaN value should be positive or negative + * (for what that's worth). + */ +RTDECL(long double) RTStrNanLongDouble(const char *pszTag, bool fPositive); + +/** + * Gets a double NaN. + * + * @returns NaN value. + * @param pszTag Optional NaN tag for modifying the NaN value. We + * recognizes a string of hex digits for inserting into the + * fraction part. This may be followed 'quiet' or + * 'signaling', ignoring case and requiring at only the + * first character. The two components may be separated by + * zero or more '_' characters. Any other stuff in the tag + * will be ignored. + * + * If the tag is empty or we cannot grok any of it, we'll + * return a default quiet NaN. + * @param fPositive Whether the NaN value should be positive or negative + * (for what that's worth). + */ +RTDECL(double) RTStrNanDouble(const char *pszTag, bool fPositive); + +/** + * Gets a float NaN. + * + * @returns NaN value. + * @param pszTag Optional NaN tag for modifying the NaN value. We + * recognizes a string of hex digits for inserting into the + * fraction part. This may be followed 'quiet' or + * 'signaling', ignoring case and requiring at only the + * first character. The two components may be separated by + * zero or more '_' characters. Any other stuff in the tag + * will be ignored. + * + * If the tag is empty or we cannot grok any of it, we'll + * return a default quiet NaN. + * @param fPositive Whether the NaN value should be positive or negative + * (for what that's worth). + */ +RTDECL(float) RTStrNanFloat(const char *pszTag, bool fPositive); + +/** + * 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 pszBuf Output string buffer. + * @param cbBuf The size of the output buffer. + * @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 RTUtf16PrintHexBytes. + */ +RTDECL(int) RTStrPrintHexBytes(char *pszBuf, size_t cbBuf, void const *pv, size_t cb, uint32_t fFlags); +/** @name RTSTRPRINTHEXBYTES_F_XXX - flags for RTStrPrintHexBytes and RTUtf16PritnHexBytes. + * @{ */ +/** Upper case hex digits, the default is lower case. */ +#define RTSTRPRINTHEXBYTES_F_UPPER RT_BIT(0) +/** Add a space between each group. */ +#define RTSTRPRINTHEXBYTES_F_SEP_SPACE RT_BIT(1) +/** Add a colon between each group. */ +#define RTSTRPRINTHEXBYTES_F_SEP_COLON RT_BIT(2) +/** @} */ + +/** + * Converts a string of hex bytes back into binary data. + * + * @returns IPRT status code. + * @retval VERR_INVALID_POINTER if any of the pointers are wrong. + * @retval VERR_BUFFER_OVERFLOW if the string contains too many hex bytes. + * @retval VERR_BUFFER_UNDERFLOW if there aren't enough hex bytes to fill up + * the output buffer. + * @retval VERR_UNEVEN_INPUT if the input contains a half byte. + * @retval VERR_NO_DIGITS + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * + * @param pszHex The string containing the hex bytes. + * @param pv Output buffer. + * @param cb The size of the output buffer. + * @param fFlags RTSTRCONVERTHEXBYTES_F_XXX. + */ +RTDECL(int) RTStrConvertHexBytes(char const *pszHex, void *pv, size_t cb, uint32_t fFlags); + +/** @name RTSTRCONVERTHEXBYTES_F_XXX - Flags for RTStrConvertHexBytes() and RTStrConvertHexBytesEx(). + * @{ */ +/** Accept colon as a byte separator. */ +#define RTSTRCONVERTHEXBYTES_F_SEP_COLON RT_BIT(0) +/** @} */ + +/** + * Converts a string of hex bytes back into binary data, extended version. + * + * @returns IPRT status code. + * @retval VERR_INVALID_POINTER if any of the pointers are wrong. + * @retval VERR_BUFFER_OVERFLOW if the string contains too many hex bytes. + * @retval VERR_BUFFER_UNDERFLOW if there aren't enough hex bytes to fill up + * the output buffer and *pcbReturned is NULL. + * @retval VINF_BUFFER_UNDERFLOW if there aren't enough hex bytes to fill up + * the output buffer and *pcbReturned is not NULL, *pcbReturned holds + * the actual number of bytes. + * @retval VERR_UNEVEN_INPUT if the input contains a half byte. + * @retval VERR_NO_DIGITS + * @retval VWRN_TRAILING_CHARS + * @retval VWRN_TRAILING_SPACES + * + * @param pszHex The string containing the hex bytes. + * @param pv Output buffer. + * @param cb The size of the output buffer. + * @param fFlags RTSTRCONVERTHEXBYTES_F_XXX. + * @param ppszNext Set to point at where we stopped decoding hex bytes. + * Optional. + * @param pcbReturned Where to return the number of bytes found. Optional. + */ +RTDECL(int) RTStrConvertHexBytesEx(char const *pszHex, void *pv, size_t cb, uint32_t fFlags, + const char **ppszNext, size_t *pcbReturned); + +/** @} */ + + +/** @defgroup rt_str_space Unique String Space + * @{ + */ + +/** 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 +{ + /** Pointer to the left leaf node. Don't touch. */ + PRTSTRSPACECORE pLeft; + /** Pointer to the left right node. Don't touch. */ + PRTSTRSPACECORE pRight; + /** Pointer to the list of string with the same hash key value. Don't touch. */ + PRTSTRSPACECORE pList; + /** Hash key. Don't touch. */ + uint32_t Key; + /** 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 collided 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 remove it from. + * @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 get it from. + * @param pszString The string to get. + */ +RTDECL(PRTSTRSPACECORE) RTStrSpaceGet(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 get it from. + * @param pszString The string to get. + * @param cchMax The max string length to evaluate. Passing + * RTSTR_MAX is ok and makes it behave just like + * RTStrSpaceGet. + */ +RTDECL(PRTSTRSPACECORE) RTStrSpaceGetN(PRTSTRSPACE pStrSpace, const char *pszString, size_t cchMax); + +/** + * 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 DECLCALLBACKTYPE(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 destroy. + * @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 enumerate. + * @param pfnCallback The callback. + * @param pvUser The user argument. + */ +RTDECL(int) RTStrSpaceEnumerate(PRTSTRSPACE pStrSpace, PFNRTSTRSPACECALLBACK pfnCallback, void *pvUser); + +/** @} */ + + +/** @defgroup rt_str_hash Sting hashing + * @{ */ + +/** + * Hashes the given string using algorithm \#1. + * + * @returns String hash. + * @param pszString The string to hash. + */ +RTDECL(uint32_t) RTStrHash1(const char *pszString); + +/** + * Hashes the given string using algorithm \#1. + * + * @returns String hash. + * @param pszString The string to hash. + * @param cchString The max length to hash. Hashing will stop if the + * terminator character is encountered first. Passing + * RTSTR_MAX is fine. + */ +RTDECL(uint32_t) RTStrHash1N(const char *pszString, size_t cchString); + +/** + * Hashes the given strings as if they were concatenated using algorithm \#1. + * + * @returns String hash. + * @param cPairs The number of string / length pairs in the + * ellipsis. + * @param ... List of string (const char *) and length + * (size_t) pairs. Passing RTSTR_MAX as the size is + * fine. + */ +RTDECL(uint32_t) RTStrHash1ExN(size_t cPairs, ...); + +/** + * Hashes the given strings as if they were concatenated using algorithm \#1. + * + * @returns String hash. + * @param cPairs The number of string / length pairs in the @a va. + * @param va List of string (const char *) and length + * (size_t) pairs. Passing RTSTR_MAX as the size is + * fine. + */ +RTDECL(uint32_t) RTStrHash1ExNV(size_t cPairs, va_list va); + +/** @} */ + + +/** @defgroup rt_str_mem Raw memory operations. + * + * @note Following the memchr/memcpy/memcmp/memset tradition and putting these + * in the string.h header rather than in the mem.h one. + * + * @{ */ + +/** + * Searches @a pvHaystack for a 16-bit sized and aligned @a uNeedle. + * + * @returns Pointer to the first hit if found, NULL if not found. + * @param pvHaystack The memory to search. + * @param uNeedle The 16-bit value to find. + * @param cbHaystack Size of the memory to search. + * @sa memchr, RTStrMemFind32, RTStrMemFind64 + */ +RTDECL(uint16_t *) RTStrMemFind16(const void *pvHaystack, uint16_t uNeedle, size_t cbHaystack); + +/** + * Searches @a pvHaystack for a 32-bit sized and aligned @a uNeedle. + * + * @returns Pointer to the first hit if found, NULL if not found. + * @param pvHaystack The memory to search. + * @param uNeedle The 32-bit value to find. + * @param cbHaystack Size of the memory to search. + * @sa memchr, RTStrMemFind16, RTStrMemFind64 + */ +RTDECL(uint32_t *) RTStrMemFind32(const void *pvHaystack, uint32_t uNeedle, size_t cbHaystack); + +/** + * Searches @a pvHaystack for a 64-bit sized and aligned @a uNeedle. + * + * @returns Pointer to the first hit if found, NULL if not found. + * @param pvHaystack The memory to search. + * @param uNeedle The 64-bit value to find. + * @param cbHaystack Size of the memory to search. + * @sa memchr, RTStrMemFind16, RTStrMemFind32 + */ +RTDECL(uint64_t *) RTStrMemFind64(const void *pvHaystack, uint64_t uNeedle, size_t cbHaystack); + +/** @} */ + + +/** @} */ + +RT_C_DECLS_END + +#endif /* !IPRT_INCLUDED_string_h */ |