[wxWidgets.git] / src / stc / scintilla / include / SString.h

// SciTE - Scintilla based Text Editor
/** @file SString.h
 ** A simple string class.
 **/
// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

#ifndef SSTRING_H
#define SSTRING_H

// These functions are implemented because each platform calls them something different.
int CompareCaseInsensitive(const char *a, const char *b);
int CompareNCaseInsensitive(const char *a, const char *b, int len);
bool EqualCaseInsensitive(const char *a, const char *b);

// Define another string class.
// While it would be 'better' to use std::string, that doubles the executable size.
// An SString may contain embedded nul characters.

/**
 * @brief A simple string class.
 *
 * Hold the length of the string for quick operations,
 * can have a buffer bigger than the string to avoid too many memory allocations and copies.
 * May have embedded zeroes as a result of @a substitute, but rely too heavily on C string
 * functions to allow reliable manipulations of these strings.
 **/
class SString {
public:
	/** Type of string lengths (sizes) and positions (indexes). */
	typedef unsigned int lenpos_t;
	/** Out of bounds value indicating that the string argument should be measured. */
	enum { measure_length=0xffffffffU};

private:
	char *s;				///< The C string
	lenpos_t sSize;			///< The size of the buffer, less 1: ie. the maximum size of the string
	lenpos_t sLen;			///< The size of the string in s
	lenpos_t sizeGrowth;	///< Minimum growth size when appending strings
	enum { sizeGrowthDefault = 64 };
	bool grow(lenpos_t lenNew) {
		while (sizeGrowth * 6 < lenNew) {
			sizeGrowth *= 2;
		}
		char *sNew = new char[lenNew + sizeGrowth + 1];
		if (sNew) {
			if (s) {
				memcpy(sNew, s, sLen);
				delete []s;
			}
			s = sNew;
			s[sLen] = '\0';
			sSize = lenNew + sizeGrowth;
		}
		return sNew != 0;
	}

	SString &assign(const char *sOther, lenpos_t sSize_=measure_length) {
		if (!sOther) {
			sSize_ = 0;
		} else if (sSize_ == measure_length) {
			sSize_ = strlen(sOther);
		}
		if (sSize > 0 && sSize_ <= sSize) {	// Does not allocate new buffer if the current is big enough
			if (s && sSize_) {
				strncpy(s, sOther, sSize_);
			}
			s[sSize_] = '\0';
			sLen = sSize_;
		} else {
			delete []s;
			s = StringAllocate(sOther, sSize_);
			if (s) {
				sSize = sSize_;	// Allow buffer bigger than real string, thus providing space to grow
				sLen = strlen(s);
			} else {
				sSize = sLen = 0;
			}
		}
		return *this;
	}

public:
	SString() : s(0), sSize(0), sLen(0), sizeGrowth(sizeGrowthDefault) {
	}
	SString(const SString &source) : sizeGrowth(sizeGrowthDefault) {
		s = StringAllocate(source.s);
		sSize = sLen = (s) ? strlen(s) : 0;
	}
	SString(const char *s_) : sizeGrowth(sizeGrowthDefault) {
		s = StringAllocate(s_);
		sSize = sLen = (s) ? strlen(s) : 0;
	}
	SString(const char *s_, lenpos_t first, lenpos_t last) : sizeGrowth(sizeGrowthDefault) {
		s = StringAllocate(s_ + first, last - first);
		sSize = sLen = (s) ? strlen(s) : 0;
	}
	SString(int i) : sizeGrowth(sizeGrowthDefault) {
		char number[32];
		sprintf(number, "%0d", i);
		s = StringAllocate(number);
		sSize = sLen = (s) ? strlen(s) : 0;
	}
	SString(double d, int precision) : sizeGrowth(sizeGrowthDefault) {
		char number[32];
		sprintf(number, "%.*f", precision, d);
		s = StringAllocate(number);
		sSize = sLen = (s) ? strlen(s) : 0;
	}
	~SString() {
		delete []s;
		s = 0;
		sSize = 0;
		sLen = 0;
	}
	void clear() {
		if (s) {
			*s = '\0';
		}
		sLen = 0;
	}
	/** Size of buffer. */
	lenpos_t size() const {
		if (s)
			return sSize;
		else
			return 0;
	}
	/** Size of string in buffer. */
	lenpos_t length() const {
		return sLen;
	}
	SString &operator=(const char *source) {
		return assign(source);
	}
	SString &operator=(const SString &source) {
		if (this != &source) {
			assign(source.c_str());
		}
		return *this;
	}
	bool operator==(const SString &sOther) const {
		if ((s == 0) && (sOther.s == 0))
			return true;
		if ((s == 0) || (sOther.s == 0))
			return false;
		return strcmp(s, sOther.s) == 0;
	}
	bool operator!=(const SString &sOther) const {
		return !operator==(sOther);
	}
	bool operator==(const char *sOther) const {
		if ((s == 0) && (sOther == 0))
			return true;
		if ((s == 0) || (sOther == 0))
			return false;
		return strcmp(s, sOther) == 0;
	}
	bool operator!=(const char *sOther) const {
		return !operator==(sOther);
	}
	bool contains(char ch) {
		if (s && *s)
			return strchr(s, ch) != 0;
		else
			return false;
	}
	void setsizegrowth(lenpos_t sizeGrowth_) {
		sizeGrowth = sizeGrowth_;
	}
	const char *c_str() const {
		if (s)
			return s;
		else
			return "";
	}
	/** Give ownership of buffer to caller which must use delete[] to free buffer. */
	char *detach() {
		char *sRet = s;
		s = 0;
		sSize = 0;
		sLen = 0;
		return sRet;
	}
	char operator[](lenpos_t i) const {
		if (s && i < sSize)	// Or < sLen? Depends on the use, both are OK
			return s[i];
		else
			return '\0';
	}
	SString &append(const char *sOther, lenpos_t sLenOther=measure_length, char sep = '\0') {
		if (!sOther) {
			return *this;
		}
		if (sLenOther == measure_length) {
			sLenOther = strlen(sOther);
		}
		int lenSep = 0;
		if (sLen && sep) {	// Only add a separator if not empty
			lenSep = 1;
		}
		lenpos_t lenNew = sLen + sLenOther + lenSep;
		// Conservative about growing the buffer: don't do it, unless really needed
		if ((lenNew + 1 < sSize) || (grow(lenNew))) {
			if (lenSep) {
				s[sLen] = sep;
				sLen++;
			}
			strncpy(&s[sLen], sOther, sLenOther);
			sLen += sLenOther;
			s[sLen] = '\0';
		}
		return *this;
	}
	SString &operator+=(const char *sOther) {
		return append(sOther, static_cast<lenpos_t>(measure_length));
	}
	SString &operator+=(const SString &sOther) {
		return append(sOther.s, sOther.sSize);
	}
	SString &operator+=(char ch) {
		return append(&ch, 1);
	}
	SString &appendwithseparator(const char *sOther, char sep) {
		return append(sOther, strlen(sOther), sep);
	}
	SString &insert(lenpos_t pos, const char *sOther, lenpos_t sLenOther=measure_length) {
		if (!sOther) {
			return *this;
		}
		if (sLenOther == measure_length) {
			sLenOther = strlen(sOther);
		}
		lenpos_t lenNew = sLen + sLenOther;
		// Conservative about growing the buffer: don't do it, unless really needed
		if ((lenNew + 1 < sSize) || grow(lenNew)) {
			lenpos_t moveChars = sLen - pos + 1;
			for (lenpos_t i = moveChars; i > 0; i--) {
				s[pos + sLenOther + i - 1] = s[pos + i - 1];
			}
			memcpy(s + pos, sOther, sLenOther);
			sLen = lenNew;
		}
		return *this;
	}
	/** Remove @a len characters from the @a pos position, included.
	 * Characters at pos + len and beyond replace characters at pos.
	 * If @a len is 0, or greater than the length of the string
	 * starting at @a pos, the string is just truncated at @a pos.
	 */
	void remove(lenpos_t pos, lenpos_t len) {
		if (len < 1 || pos + len >= sLen) {
			s[pos] = '\0';
			sLen = pos;
		} else {
			for (lenpos_t i = pos; i < sLen - len + 1; i++) {
				s[i] = s[i+len];
			}
			sLen -= len;
		}
	}
	/** Read an integral numeric value from the string. */
	int value() const {
		if (s)
			return atoi(s);
		else
			return 0;
	}
	int search(const char *sFind, lenpos_t start=0) {
		if (start < sLen) {
			const char *sFound = strstr(s + start, sFind);
			if (sFound) {
				return sFound - s;
			}
		}
		return -1;
	}
	bool contains(const char *sFind) {
		return search(sFind) >= 0;
	}
	int substitute(char chFind, char chReplace) {
		int c = 0;
		char *t = s;
		while (t) {
			t = strchr(t, chFind);
			if (t) {
				*t = chReplace;
				t++;
				c++;
			}
		}
		return c;
	}
	int substitute(const char *sFind, const char *sReplace) {
		int c = 0;
		lenpos_t lenFind = strlen(sFind);
		lenpos_t lenReplace = strlen(sReplace);
		int posFound = search(sFind);
		while (posFound >= 0) {
			remove(posFound, lenFind);
			insert(posFound, sReplace, lenReplace);
			posFound = search(sFind, posFound + lenReplace);
			c++;
		}
		return c;
	}
	int remove(const char *sFind) {
		return substitute(sFind, "");
	}
	/**
	 * Duplicate a C string.
	 * Allocate memory of the given size, or big enough to fit the string if length isn't given;
	 * then copy the given string in the allocated memory.
	 * @return the pointer to the new string
	 */
	static char *StringAllocate(
		const char *s,			///< The string to duplicate
		lenpos_t len=measure_length)	///< The length of memory to allocate. Optional.
	{
		if (s == 0) {
			return 0;
		}
		if (len == measure_length) {
			len = strlen(s);
		}
		char *sNew = new char[len + 1];
		if (sNew) {
			strncpy(sNew, s, len);
			sNew[len] = '\0';
		}
		return sNew;
	}
};

/**
 * Duplicate a C string.
 * Allocate memory of the given size, or big enough to fit the string if length isn't given;
 * then copy the given string in the allocated memory.
 * @return the pointer to the new string
 */
inline char *StringDup(
	const char *s,			///< The string to duplicate
	SString::lenpos_t len=SString::measure_length)	///< The length of memory to allocate. Optional.
{
	return SString::StringAllocate(s, len);
}

#endif
Commit	Line	Data
65ec6247 RD	1	// SciTE - Scintilla based Text Editor
	2	/** @file SString.h
	3	** A simple string class.
	4	**/
	5	// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
	6	// The License.txt file describes the conditions under which this software may be distributed.
	7
	8	#ifndef SSTRING_H
	9	#define SSTRING_H
	10
1a2fb4cd	11	// These functions are implemented because each platform calls them something different.
65ec6247 RD	12	int CompareCaseInsensitive(const char a, const char b);
	13	int CompareNCaseInsensitive(const char a, const char b, int len);
	14	bool EqualCaseInsensitive(const char a, const char b);
	15
	16	// Define another string class.
	17	// While it would be 'better' to use std::string, that doubles the executable size.
	18	// An SString may contain embedded nul characters.
	19
65ec6247 RD	20	/**
65ec6247 RD	21	* @brief A simple string class.
1a2fb4cd	22	*
65ec6247 RD	23	* Hold the length of the string for quick operations,
	24	* can have a buffer bigger than the string to avoid too many memory allocations and copies.
	25	* May have embedded zeroes as a result of @a substitute, but rely too heavily on C string
	26	* functions to allow reliable manipulations of these strings.
	27	**/
	28	class SString {
1a2fb4cd RD	29	public:
	30	/** Type of string lengths (sizes) and positions (indexes). */
	31	typedef unsigned int lenpos_t;
	32	/** Out of bounds value indicating that the string argument should be measured. */
	33	enum { measure_length=0xffffffffU};
	34
	35	private:
	36	char *s; ///< The C string
	37	lenpos_t sSize; ///< The size of the buffer, less 1: ie. the maximum size of the string
	38	lenpos_t sLen; ///< The size of the string in s
	39	lenpos_t sizeGrowth; ///< Minimum growth size when appending strings
65ec6247	40	enum { sizeGrowthDefault = 64 };
1a2fb4cd RD	41	bool grow(lenpos_t lenNew) {
	42	while (sizeGrowth * 6 < lenNew) {
	43	sizeGrowth *= 2;
	44	}
	45	char *sNew = new char[lenNew + sizeGrowth + 1];
	46	if (sNew) {
	47	if (s) {
	48	memcpy(sNew, s, sLen);
	49	delete []s;
	50	}
	51	s = sNew;
	52	s[sLen] = '\0';
	53	sSize = lenNew + sizeGrowth;
	54	}
	55	return sNew != 0;
	56	}
65ec6247	57
1a2fb4cd RD	58	SString &assign(const char *sOther, lenpos_t sSize_=measure_length) {
	59	if (!sOther) {
	60	sSize_ = 0;
	61	} else if (sSize_ == measure_length) {
	62	sSize_ = strlen(sOther);
	63	}
	64	if (sSize > 0 && sSize_ <= sSize) { // Does not allocate new buffer if the current is big enough
	65	if (s && sSize_) {
	66	strncpy(s, sOther, sSize_);
	67	}
	68	s[sSize_] = '\0';
	69	sLen = sSize_;
	70	} else {
	71	delete []s;
	72	s = StringAllocate(sOther, sSize_);
	73	if (s) {
	74	sSize = sSize_; // Allow buffer bigger than real string, thus providing space to grow
	75	sLen = strlen(s);
	76	} else {
	77	sSize = sLen = 0;
	78	}
	79	}
	80	return *this;
	81	}
65ec6247	82
1a2fb4cd	83	public:
65ec6247 RD	84	SString() : s(0), sSize(0), sLen(0), sizeGrowth(sizeGrowthDefault) {
	85	}
	86	SString(const SString &source) : sizeGrowth(sizeGrowthDefault) {
1a2fb4cd	87	s = StringAllocate(source.s);
65ec6247 RD	88	sSize = sLen = (s) ? strlen(s) : 0;
	89	}
	90	SString(const char *s_) : sizeGrowth(sizeGrowthDefault) {
1a2fb4cd	91	s = StringAllocate(s_);
65ec6247 RD	92	sSize = sLen = (s) ? strlen(s) : 0;
65ec6247 RD	93	}
1a2fb4cd RD	94	SString(const char *s_, lenpos_t first, lenpos_t last) : sizeGrowth(sizeGrowthDefault) {
1a2fb4cd RD	95	s = StringAllocate(s_ + first, last - first);
65ec6247 RD	96	sSize = sLen = (s) ? strlen(s) : 0;
	97	}
	98	SString(int i) : sizeGrowth(sizeGrowthDefault) {
	99	char number[32];
	100	sprintf(number, "%0d", i);
1a2fb4cd RD	101	s = StringAllocate(number);
	102	sSize = sLen = (s) ? strlen(s) : 0;
	103	}
	104	SString(double d, int precision) : sizeGrowth(sizeGrowthDefault) {
	105	char number[32];
	106	sprintf(number, "%.*f", precision, d);
	107	s = StringAllocate(number);
65ec6247 RD	108	sSize = sLen = (s) ? strlen(s) : 0;
	109	}
	110	~SString() {
	111	delete []s;
	112	s = 0;
	113	sSize = 0;
	114	sLen = 0;
	115	}
1a2fb4cd	116	void clear() {
65ec6247 RD	117	if (s) {
	118	*s = '\0';
	119	}
	120	sLen = 0;
	121	}
	122	/** Size of buffer. */
1a2fb4cd	123	lenpos_t size() const {
65ec6247 RD	124	if (s)
	125	return sSize;
	126	else
	127	return 0;
	128	}
	129	/** Size of string in buffer. */
1a2fb4cd	130	lenpos_t length() const {
65ec6247 RD	131	return sLen;
65ec6247 RD	132	}
65ec6247 RD	133	SString &operator=(const char *source) {
	134	return assign(source);
	135	}
	136	SString &operator=(const SString &source) {
	137	if (this != &source) {
	138	assign(source.c_str());
	139	}
	140	return *this;
	141	}
	142	bool operator==(const SString &sOther) const {
	143	if ((s == 0) && (sOther.s == 0))
	144	return true;
	145	if ((s == 0) \|\| (sOther.s == 0))
	146	return false;
	147	return strcmp(s, sOther.s) == 0;
	148	}
	149	bool operator!=(const SString &sOther) const {
	150	return !operator==(sOther);
	151	}
	152	bool operator==(const char *sOther) const {
	153	if ((s == 0) && (sOther == 0))
	154	return true;
	155	if ((s == 0) \|\| (sOther == 0))
	156	return false;
	157	return strcmp(s, sOther) == 0;
	158	}
	159	bool operator!=(const char *sOther) const {
	160	return !operator==(sOther);
	161	}
	162	bool contains(char ch) {
	163	if (s && *s)
	164	return strchr(s, ch) != 0;
	165	else
	166	return false;
	167	}
1a2fb4cd	168	void setsizegrowth(lenpos_t sizeGrowth_) {
65ec6247 RD	169	sizeGrowth = sizeGrowth_;
	170	}
	171	const char *c_str() const {
	172	if (s)
	173	return s;
	174	else
	175	return "";
	176	}
	177	/** Give ownership of buffer to caller which must use delete[] to free buffer. */
	178	char *detach() {
	179	char *sRet = s;
	180	s = 0;
	181	sSize = 0;
	182	sLen = 0;
	183	return sRet;
	184	}
1a2fb4cd	185	char operator[](lenpos_t i) const {
65ec6247 RD	186	if (s && i < sSize) // Or < sLen? Depends on the use, both are OK
	187	return s[i];
	188	else
	189	return '\0';
	190	}
1a2fb4cd RD	191	SString &append(const char *sOther, lenpos_t sLenOther=measure_length, char sep = '\0') {
	192	if (!sOther) {
	193	return *this;
	194	}
	195	if (sLenOther == measure_length) {
65ec6247	196	sLenOther = strlen(sOther);
1a2fb4cd	197	}
65ec6247	198	int lenSep = 0;
1a2fb4cd	199	if (sLen && sep) { // Only add a separator if not empty
65ec6247	200	lenSep = 1;
1a2fb4cd RD	201	}
	202	lenpos_t lenNew = sLen + sLenOther + lenSep;
	203	// Conservative about growing the buffer: don't do it, unless really needed
	204	if ((lenNew + 1 < sSize) \|\| (grow(lenNew))) {
65ec6247 RD	205	if (lenSep) {
	206	s[sLen] = sep;
	207	sLen++;
	208	}
	209	strncpy(&s[sLen], sOther, sLenOther);
65ec6247	210	sLen += sLenOther;
1a2fb4cd	211	s[sLen] = '\0';
65ec6247 RD	212	}
	213	return *this;
	214	}
1a2fb4cd RD	215	SString &operator+=(const char *sOther) {
1a2fb4cd RD	216	return append(sOther, static_cast<lenpos_t>(measure_length));
65ec6247	217	}
1a2fb4cd	218	SString &operator+=(const SString &sOther) {
65ec6247 RD	219	return append(sOther.s, sOther.sSize);
65ec6247 RD	220	}
1a2fb4cd	221	SString &operator+=(char ch) {
65ec6247 RD	222	return append(&ch, 1);
65ec6247 RD	223	}
1a2fb4cd	224	SString &appendwithseparator(const char *sOther, char sep) {
65ec6247 RD	225	return append(sOther, strlen(sOther), sep);
65ec6247 RD	226	}
1a2fb4cd RD	227	SString &insert(lenpos_t pos, const char *sOther, lenpos_t sLenOther=measure_length) {
	228	if (!sOther) {
	229	return *this;
	230	}
	231	if (sLenOther == measure_length) {
	232	sLenOther = strlen(sOther);
	233	}
	234	lenpos_t lenNew = sLen + sLenOther;
	235	// Conservative about growing the buffer: don't do it, unless really needed
	236	if ((lenNew + 1 < sSize) \|\| grow(lenNew)) {
	237	lenpos_t moveChars = sLen - pos + 1;
	238	for (lenpos_t i = moveChars; i > 0; i--) {
	239	s[pos + sLenOther + i - 1] = s[pos + i - 1];
	240	}
	241	memcpy(s + pos, sOther, sLenOther);
	242	sLen = lenNew;
	243	}
	244	return *this;
	245	}
	246	/** Remove @a len characters from the @a pos position, included.
	247	* Characters at pos + len and beyond replace characters at pos.
	248	* If @a len is 0, or greater than the length of the string
	249	* starting at @a pos, the string is just truncated at @a pos.
	250	*/
	251	void remove(lenpos_t pos, lenpos_t len) {
	252	if (len < 1 \|\| pos + len >= sLen) {
	253	s[pos] = '\0';
	254	sLen = pos;
	255	} else {
	256	for (lenpos_t i = pos; i < sLen - len + 1; i++) {
	257	s[i] = s[i+len];
	258	}
	259	sLen -= len;
	260	}
	261	}
	262	/** Read an integral numeric value from the string. */
65ec6247 RD	263	int value() const {
	264	if (s)
	265	return atoi(s);
	266	else
	267	return 0;
	268	}
1a2fb4cd RD	269	int search(const char *sFind, lenpos_t start=0) {
	270	if (start < sLen) {
	271	const char *sFound = strstr(s + start, sFind);
	272	if (sFound) {
	273	return sFound - s;
	274	}
	275	}
	276	return -1;
	277	}
	278	bool contains(const char *sFind) {
	279	return search(sFind) >= 0;
	280	}
	281	int substitute(char chFind, char chReplace) {
	282	int c = 0;
65ec6247 RD	283	char *t = s;
65ec6247 RD	284	while (t) {
1a2fb4cd	285	t = strchr(t, chFind);
65ec6247	286	if (t) {
1a2fb4cd	287	*t = chReplace;
65ec6247	288	t++;
1a2fb4cd	289	c++;
65ec6247 RD	290	}
65ec6247 RD	291	}
1a2fb4cd RD	292	return c;
	293	}
	294	int substitute(const char sFind, const char sReplace) {
	295	int c = 0;
	296	lenpos_t lenFind = strlen(sFind);
	297	lenpos_t lenReplace = strlen(sReplace);
	298	int posFound = search(sFind);
	299	while (posFound >= 0) {
	300	remove(posFound, lenFind);
	301	insert(posFound, sReplace, lenReplace);
	302	posFound = search(sFind, posFound + lenReplace);
	303	c++;
	304	}
	305	return c;
	306	}
	307	int remove(const char *sFind) {
	308	return substitute(sFind, "");
	309	}
	310	/**
	311	* Duplicate a C string.
	312	* Allocate memory of the given size, or big enough to fit the string if length isn't given;
	313	* then copy the given string in the allocated memory.
	314	* @return the pointer to the new string
	315	*/
	316	static char *StringAllocate(
	317	const char *s, ///< The string to duplicate
	318	lenpos_t len=measure_length) ///< The length of memory to allocate. Optional.
	319	{
	320	if (s == 0) {
	321	return 0;
	322	}
	323	if (len == measure_length) {
	324	len = strlen(s);
	325	}
	326	char *sNew = new char[len + 1];
	327	if (sNew) {
	328	strncpy(sNew, s, len);
	329	sNew[len] = '\0';
	330	}
	331	return sNew;
65ec6247 RD	332	}
	333	};
	334
1a2fb4cd RD	335	/**
	336	* Duplicate a C string.
	337	* Allocate memory of the given size, or big enough to fit the string if length isn't given;
	338	* then copy the given string in the allocated memory.
	339	* @return the pointer to the new string
	340	*/
	341	inline char *StringDup(
	342	const char *s, ///< The string to duplicate
	343	SString::lenpos_t len=SString::measure_length) ///< The length of memory to allocate. Optional.
	344	{
	345	return SString::StringAllocate(s, len);
	346	}
	347
65ec6247	348	#endif