This file contains miscellaneous functions that are generally useful for Qt-based applications. More...

#include <QString>

Macros
#define	MUTILS_API

#define	MUTILS_MAKE_STRING_HELPER(X) #X

#define	MUTILS_MAKE_STRING(X) MUTILS_MAKE_STRING_HELPER(X)

#define	MUTILS_COMPILER_WARNING(TXT) __pragma(message(__FILE__ "(" MUTILS_MAKE_STRING(__LINE__) ") : warning: " TXT))

#define	MUTILS_DEBUG (1)

#define	MUTILS_DELETE(PTR) do { if((PTR)) { delete (PTR); (PTR) = NULL; } } while(0)

#define	MUTILS_DELETE_ARRAY(PTR) do { if((PTR)) { delete [] (PTR); (PTR) = NULL; } } while(0)

#define	MUTILS_ZERO_MEMORY(PTR) memset(&(PTR), 0, sizeof((PTR)))

#define	MUTILS_WCHR(STR) (reinterpret_cast<const wchar_t*>((STR).utf16()))

#define	MUTILS_UTF8(STR) ((STR).toUtf8().constData())

#define	MUTILS_QSTR(STR) (QString::fromUtf16(reinterpret_cast<const unsigned short*>((STR))))

#define	MUTILS_BOOL2STR(X) ((X) ? "1" : "0")

Functions
const QString &	MUtils::temp_folder (void)
	Rerieves the full path of the application's Temp folder. More...

void	MUtils::init_process (QProcess &process, const QString &wokringDir, const bool bReplaceTempDir=true, const QStringList *const extraPaths=NULL)

quint32	MUtils::next_rand_u32 (void)
	Generates a random unsigned 32-Bit value. More...

quint64	MUtils::next_rand_u64 (void)
	Generates a random unsigned 64-Bit value. More...

QString	MUtils::next_rand_str (const bool &bLong=false)
	Generates a random string. More...

QString	MUtils::make_temp_file (const QString &basePath, const QString &extension, const bool placeholder=false)
	Generates a temporary file name. More...

QString	MUtils::make_unique_file (const QString &basePath, const QString &baseName, const QString &extension, const bool fancy=false)
	Generates a unique file name. More...

bool	MUtils::parity (quint32 value)
	Computes the parity of the given unsigned 32-Bit value. More...

bool	MUtils::remove_file (const QString &fileName)
	Deletes the specified file. More...

bool	MUtils::remove_directory (const QString &folderPath, const bool &recursive)
	Recursively deletes the specified directory. More...

QString &	MUtils::trim_right (QString &str)
	Remove trailing white-space characters. More...

QString &	MUtils::trim_left (QString &str)
	Remove leading white-space characters. More...

QString	MUtils::trim_right (const QString &str)
	Remove trailing white-space characters. More...

QString	MUtils::trim_left (const QString &str)
	Remove trailing white-space characters. More...

void	MUtils::natural_string_sort (QStringList &list, const bool bIgnoreCase)
	Sort a list of strings using "natural ordering" algorithm. More...

QString	MUtils::clean_file_name (const QString &name)

QString	MUtils::clean_file_path (const QString &path)

bool	MUtils::regexp_parse_uint32 (const QRegExp &regexp, quint32 &value)
	Parse regular expression results. More...

bool	MUtils::regexp_parse_uint32 (const QRegExp &regexp, quint32 *values, const size_t &count)
	Parse regular expression results. More...

QStringList	MUtils::available_codepages (const bool &noAliases=true)
	Retrieve a list of all available codepages. More...

Detailed Description

This file contains miscellaneous functions that are generally useful for Qt-based applications.

Function Documentation

§ available_codepages()

QStringList MUtils::available_codepages ( const bool & noAliases = true )

Retrieve a list of all available codepages.

The function generates a list of all codepages that are available on the system. Each codepage name returned by this function may be passed to the QTextCodec::codecForName() function in order to obtain a corresponding QTextCodec object.

Parameters

noAliases If set to true, only distinct codepages are returned, i.e. any codepage aliases are discarded from the list; if set to false, the returned list may (and usually will) also contain codepage aliases.

Returns: If the function succeeds, it returns a QStringList holding the names of all codepages available on the system; otherwise it returns a default-constructed QStringList.

§ make_temp_file()

QString MUtils::make_temp_file	(	const QString &	basePath,
		const QString &	extension,
		const bool	placeholder = `false`
	)

Generates a temporary file name.

The function generates a file name that contains a random component and that is guaranteed to not exist yet. The generated file name follows a "<basedir>/<random>.<ext>" pattern. This is useful (not only) for creating temporary files.

Parameters

basePath	Specifies the "base" directory where the temporary file is supposed to be created. This must be a valid existing directory.
extension	Specifies the desired file extensions of the temporary file. Do not include a leading dot (`.`) character.
placeholder	If set to `true`, the function creates an empty "placeholder" file under the returned file name; if set to `false`, it does not.

Returns: If the function succeeds, it returns a QString holding the full path of the temporary file; otherwise it returns a default-constructed QString.

§ make_unique_file()

QString MUtils::make_unique_file	(	const QString &	basePath,
		const QString &	baseName,
		const QString &	extension,
		const bool	fancy = `false`
	)

Generates a unique file name.

The function generates a unique file name in the specified directory. The function guarantees that the returned file name does not exist yet. If necessary, a counter will be included in the file name in order to ensure its uniqueness.

Parameters

basePath	Specifies the "base" directory where the unique file is supposed to be created. This must be a valid existing directory.
baseName	Specifies the desired "base" file name of the unique file. Do not include a file extension.
extension	Specifies the desired file extensions of the unique file. Do not include a leading dot (`.`) character.
fancy	If set to `true`, the unique file name is generated according to the `"<basedir>/<basename> (N).<ext>"` pattern; if set to `false`, it is generated according to the `"<basedir>/<basename>.XXXX.<ext>"` pattern. Also, if set to `true`, a counter is only included in the file name, if the file name without counter already exists; if set to `false`, a counter is always included. Finally, if set to `true`, the counter starts at 2 and is printed in decimal format; if set to `false`, the counter starts at 0 and is printed in zero-padded hexadecimal format.

Returns: If the function succeeds, it returns a QString holding the full path of the unique file; otherwise it returns a default-constructed QString.

§ natural_string_sort()

void MUtils::natural_string_sort	(	QStringList &	list,
		const bool	bIgnoreCase
	)

Sort a list of strings using "natural ordering" algorithm.

This function implements a sort algorithm that orders alphanumeric strings in the way a human being would. See Natural Order String Comparison for details!

Parameters

list	A reference to the QStringList object to be sorted. The list will be sorted "in place".
bIgnoreCase	If set to `true`, the list will be sorted disregarding the character case, i.e. upper-case and lower-case characters (of the same letter) are treated the same; if set to `false`, the character case is taken into account.

§ next_rand_str()

QString MUtils::next_rand_str ( const bool & bLong = false )

Generates a random string.

The random string is generated using the same PRNG as the next_rand_u64() function. The random bytes are converted to a hexadecimal string and, if necessary, zero-padded to a toal length of 16 or 32 characters. There is no 0x-prefix included in the result.

Parameters

bLong If set to true, a "long" random string (32 characters) will be generated; if set to false, a "short" random string (16 characters) is generated.

Returns: The function returns a QString holding a random hexadecimal string

§ next_rand_u32()

quint32 MUtils::next_rand_u32 ( void )

Generates a random unsigned 32-Bit value.

The random value is created using a "strong" PRNG of the underlying system, if possible. Otherwise a fallback PRNG is used. It is not required or useful to call srand() or qsrand() prior to using this function. If necessary, the seeding of the PRNG happen automatically on the first call.

Returns: The function returns a random unsigned 32-Bit value.

§ next_rand_u64()

quint64 MUtils::next_rand_u64 ( void )

Generates a random unsigned 64-Bit value.

The random value is created using a "strong" PRNG of the underlying system, if possible. Otherwise a fallback PRNG is used. It is not required or useful to call srand() or qsrand() prior to using this function. If necessary, the seeding of the PRNG happen automatically on the first call.

Returns: The function returns a random unsigned 64-Bit value.

§ parity()

bool MUtils::parity ( quint32 value )

Computes the parity of the given unsigned 32-Bit value.

Parameters

value The 32-Bit unsigned value from which the parity is to be computed.

Returns: The function returns true, if the number of 1 bits in the given value is odd; it returns false, if the number of 1 bits in the given value is even.

§ regexp_parse_uint32() [1/2]

bool MUtils::regexp_parse_uint32	(	const QRegExp &	regexp,
		quint32 &	value
	)

Parse regular expression results.

This function tries to parses the result (capture) of a regular expression as an unsigned 32-Bit value. The given regular expression must contain at least one capture. Only the first capture is considered, additional captures are ignored.

Parameters

regexp	A read-only reference to the QRegExp object whose result (capture) will be parsed. This QRegExp must already have been successfully matched against the respective input string, e.g. via `QRegExp::indexIn()`, prior to calling this function.
value	A reference to a variable of type `quint32`, where the unsigned 32-Bit representation of the result will be stored. The contents of this variable are undefined, if the function failed.

Returns: The function returns true, if the regular expression's capture could be parsed successfully; it returns false, if the capture contains an invalid string or if there are insufficient captures in given the QRegExp object.

§ regexp_parse_uint32() [2/2]

bool MUtils::regexp_parse_uint32	(	const QRegExp &	regexp,
		quint32 *	values,
		const size_t &	count
	)

Parse regular expression results.

This function tries to parses the results (captures) of a regular expression as unsigned 32-Bit values. The given regular expression must contain at least count captures. Only the first count captures are considered, additional captures are ignored.

Parameters

regexp	A read-only reference to the QRegExp object whose results (captures) will be parsed. This QRegExp must already have been successfully matched against the respective input string, e.g. via `QRegExp::indexIn()`, prior to calling this function.
value	A pointer to an array of type `quint32`, where the unsigned 32-Bit representations of the results will be stored (the `n`-th result is stored at `value[n-1]`). The array must be at least `count` elements in length. The contents of this array are undefined, if the function failed.
count	Specifies the number of results (captures) in the given QRegExp object. The function tries to parse the first `count` captures and ignores any additional captures that may exist. This parameter also determines the required (minimum) length of the `value` array.

Returns: The function returns true, if all of the regular expression's captures could be parsed successfully; it returns false, if any of the captures contain an invalid string or if there are insufficient captures in given the QRegExp object.

§ remove_directory()

bool MUtils::remove_directory	(	const QString &	folderPath,
		const bool &	recursive
	)

Recursively deletes the specified directory.

The function deletes the specified directory. In recursive mode, the directory will be removed including all of its files and sub-directories. Files are deleted using the remove_file() function.

Parameters

folderPath	The path to the directory to be deleted. This should be a full path.
recursive	If set to `true` the function removes all files and sub-directories in the specified directory; if set to `false`, the function will not try to delete any files or sub-directories, which means that it will fail on non-empty directories.

Returns: The function returns true, if the directory was deleted successfully or if the directory doesn't exist; it returns false, if the directory could not be deleted.

§ remove_file()

bool MUtils::remove_file ( const QString & fileName )

Deletes the specified file.

The function deletes the specified file, even if it has the "read only" flag set. If the file is currently locked (e.g. by another process), the function retries multiple times to delete the file before it fails.

Parameters

fileName The path to the file to be deleted. This should be a full path.

Returns: The function returns true, if the file was deleted successfully or if the file doesn't exist; it returns false, if the file could not be deleted.

§ temp_folder()

const QString& MUtils::temp_folder ( void )

Rerieves the full path of the application's Temp folder.

The application's Temp folder is a unique application-specific folder, intended to store any temporary files that the application may need. It will be created when this function is called for the first time (lazy initialization); subsequent calls are guaranteed to return the same path. Usually the application's Temp folder will be created as a sub-folder of the system's global Temp folder, as indicated by the TMP or TEMP environment variables. However, it may be created at a different place (e.g. in the users Profile directory), if those environment variables don't point to a usable directory. In any case, this function makes sure that the application's Temp folder exists for the whole lifetime of the application and that it is writable. When the application terminates normally, the application's Temp folder and all files or sub-directories thereof will be removed automatically!

Returns: If the function succeeds, it returns a read-only reference to a QString holding the full path of the application's Temp folder; otherwise a read-only reference to a default-constructed QString is returned.

§ trim_left() [1/2]

QString& MUtils::trim_left ( QString & str )

Remove leading white-space characters.

The function removes all leading white-space characters from the specified string. Trailing white-space characters are not removed. White-space characters are defined by the \s character class.

Parameters

str	A reference to the QString object to be trimmed. This QString object will be modified directly.

Returns: A reference to the trimmed QString object. This is the same QString object that was specified in the str parameter.

§ trim_left() [2/2]

QString MUtils::trim_left ( const QString & str )

Remove trailing white-space characters.

The function removes all leading white-space characters from the specified string. Trailing white-space characters are not removed. White-space characters are defined by the \s character class.

Parameters

str	A read-only reference to the QString object to be trimmed. The original QString object is not modified.

Returns: A new QString object that equals the original QString object, except that it has all leading white-space characters removed.

§ trim_right() [1/2]

QString& MUtils::trim_right ( QString & str )

Remove trailing white-space characters.

The function removes all trailing white-space characters from the specified string. Leading white-space characters are not removed. White-space characters are defined by the \s character class.

Parameters

str	A reference to the QString object to be trimmed. This QString object will be modified directly.

Returns: A reference to the trimmed QString object. This is the same QString object that was specified in the str parameter.

§ trim_right() [2/2]

QString MUtils::trim_right ( const QString & str )

Remove trailing white-space characters.

The function removes all trailing white-space characters from the specified string. Leading white-space characters are not removed. White-space characters are defined by the \s character class.

Parameters

str	A read-only reference to the QString object to be trimmed. The original QString object is not modified.

Returns: A new QString object that equals the original QString object, except that it has all trailing white-space characters removed.

Macros

Functions

Detailed Description

Function Documentation

§ available_codepages()

§ make_temp_file()

§ make_unique_file()

§ natural_string_sort()

§ next_rand_str()

§ next_rand_u32()

§ next_rand_u64()

§ parity()

§ regexp_parse_uint32() [1/2]

§ regexp_parse_uint32() [2/2]

§ remove_directory()

§ remove_file()

§ temp_folder()

§ trim_left() [1/2]

§ trim_left() [2/2]

§ trim_right() [1/2]

§ trim_right() [2/2]