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, size_t 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 relies too heavily on C string
 * functions to allow reliable manipulations of these strings, other than simple appends, etc.
 **/
class SString {
public:
	/** Type of string lengths (sizes) and positions (indexes). */
	typedef size_t 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_) {
				memcpy(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) {
		// note: expects the "last" argument to point one beyond the range end (a la STL iterators)
		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 substr(lenpos_t subPos, lenpos_t subLen=measure_length) const {
		if (subPos >= sLen) {
			return SString();					// return a null string if start index is out of bounds
		}
		if ((subLen == measure_length) || (subPos + subLen > sLen)) {
			subLen = sLen - subPos;		// can't substr past end of source string
		}
		return SString(s, subPos, subPos + subLen);
	}
	SString &lowercase(lenpos_t subPos = 0, lenpos_t subLen=measure_length) {
		if ((subLen == measure_length) || (subPos + subLen > sLen)) {
			subLen = sLen - subPos;		// don't apply past end of string
		}
		for (lenpos_t i = subPos; i < subPos + subLen; i++) {
			if (s[i] < 'A' || s[i] > 'Z')
				continue;
			else
				s[i] = static_cast<char>(s[i] - 'A' + 'a');
		}
		return *this;
	}
	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++;
			}
			memcpy(&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.sLen);
	}
	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;
		}
	}
	SString &change(lenpos_t pos, char ch) {
		if (pos >= sLen) {					// character changed must be in string bounds
			return *this;
		}
		*(s + pos) = ch;
		return *this;
	}
	/** 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) const {
		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) {
			memcpy(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
	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
	11	// These functions are implemented because each platform calls them something different.
	12	int CompareCaseInsensitive(const char a, const char b);
	13	int CompareNCaseInsensitive(const char a, const char b, size_t 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
	20	/**
	21	* @brief A simple string class.
	22	*
	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 relies too heavily on C string
	26	* functions to allow reliable manipulations of these strings, other than simple appends, etc.
	27	**/
	28	class SString {
	29	public:
	30	/** Type of string lengths (sizes) and positions (indexes). */
	31	typedef size_t 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
	40	enum { sizeGrowthDefault = 64 };
	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	}
	57
	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	memcpy(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	}
	82
	83	public:
	84	SString() : s(0), sSize(0), sLen(0), sizeGrowth(sizeGrowthDefault) {
	85	}
	86	SString(const SString &source) : sizeGrowth(sizeGrowthDefault) {
	87	s = StringAllocate(source.s);
	88	sSize = sLen = (s) ? strlen(s) : 0;
	89	}
	90	SString(const char *s_) : sizeGrowth(sizeGrowthDefault) {
	91	s = StringAllocate(s_);
	92	sSize = sLen = (s) ? strlen(s) : 0;
	93	}
	94	SString(const char *s_, lenpos_t first, lenpos_t last) : sizeGrowth(sizeGrowthDefault) {
	95	// note: expects the "last" argument to point one beyond the range end (a la STL iterators)
	96	s = StringAllocate(s_ + first, last - first);
	97	sSize = sLen = (s) ? strlen(s) : 0;
	98	}
	99	SString(int i) : sizeGrowth(sizeGrowthDefault) {
	100	char number[32];
	101	sprintf(number, "%0d", i);
	102	s = StringAllocate(number);
	103	sSize = sLen = (s) ? strlen(s) : 0;
	104	}
	105	SString(double d, int precision) : sizeGrowth(sizeGrowthDefault) {
	106	char number[32];
	107	sprintf(number, "%.*f", precision, d);
	108	s = StringAllocate(number);
	109	sSize = sLen = (s) ? strlen(s) : 0;
	110	}
	111	~SString() {
	112	delete []s;
	113	s = 0;
	114	sSize = 0;
	115	sLen = 0;
	116	}
	117	void clear() {
	118	if (s) {
	119	*s = '\0';
	120	}
	121	sLen = 0;
	122	}
	123	/** Size of buffer. */
	124	lenpos_t size() const {
	125	if (s)
	126	return sSize;
	127	else
	128	return 0;
	129	}
	130	/** Size of string in buffer. */
	131	lenpos_t length() const {
	132	return sLen;
	133	}
	134	SString &operator=(const char *source) {
	135	return assign(source);
	136	}
	137	SString &operator=(const SString &source) {
	138	if (this != &source) {
	139	assign(source.c_str());
	140	}
	141	return *this;
	142	}
	143	bool operator==(const SString &sOther) const {
	144	if ((s == 0) && (sOther.s == 0))
	145	return true;
	146	if ((s == 0) \|\| (sOther.s == 0))
	147	return false;
	148	return strcmp(s, sOther.s) == 0;
	149	}
	150	bool operator!=(const SString &sOther) const {
	151	return !operator==(sOther);
	152	}
	153	bool operator==(const char *sOther) const {
	154	if ((s == 0) && (sOther == 0))
	155	return true;
	156	if ((s == 0) \|\| (sOther == 0))
	157	return false;
	158	return strcmp(s, sOther) == 0;
	159	}
	160	bool operator!=(const char *sOther) const {
	161	return !operator==(sOther);
	162	}
	163	bool contains(char ch) {
	164	if (s && *s)
	165	return strchr(s, ch) != 0;
	166	else
	167	return false;
	168	}
	169	void setsizegrowth(lenpos_t sizeGrowth_) {
	170	sizeGrowth = sizeGrowth_;
	171	}
	172	const char *c_str() const {
	173	if (s)
	174	return s;
	175	else
	176	return "";
	177	}
	178	/** Give ownership of buffer to caller which must use delete[] to free buffer. */
	179	char *detach() {
	180	char *sRet = s;
	181	s = 0;
	182	sSize = 0;
	183	sLen = 0;
	184	return sRet;
	185	}
	186	char operator[](lenpos_t i) const {
	187	if (s && i < sSize) // Or < sLen? Depends on the use, both are OK
	188	return s[i];
	189	else
	190	return '\0';
	191	}
	192	SString substr(lenpos_t subPos, lenpos_t subLen=measure_length) const {
	193	if (subPos >= sLen) {
	194	return SString(); // return a null string if start index is out of bounds
	195	}
	196	if ((subLen == measure_length) \|\| (subPos + subLen > sLen)) {
	197	subLen = sLen - subPos; // can't substr past end of source string
	198	}
	199	return SString(s, subPos, subPos + subLen);
	200	}
	201	SString &lowercase(lenpos_t subPos = 0, lenpos_t subLen=measure_length) {
	202	if ((subLen == measure_length) \|\| (subPos + subLen > sLen)) {
	203	subLen = sLen - subPos; // don't apply past end of string
	204	}
	205	for (lenpos_t i = subPos; i < subPos + subLen; i++) {
	206	if (s[i] < 'A' \|\| s[i] > 'Z')
	207	continue;
	208	else
	209	s[i] = static_cast<char>(s[i] - 'A' + 'a');
	210	}
	211	return *this;
	212	}
	213	SString &append(const char *sOther, lenpos_t sLenOther=measure_length, char sep = '\0') {
	214	if (!sOther) {
	215	return *this;
	216	}
	217	if (sLenOther == measure_length) {
	218	sLenOther = strlen(sOther);
	219	}
	220	int lenSep = 0;
	221	if (sLen && sep) { // Only add a separator if not empty
	222	lenSep = 1;
	223	}
	224	lenpos_t lenNew = sLen + sLenOther + lenSep;
	225	// Conservative about growing the buffer: don't do it, unless really needed
	226	if ((lenNew + 1 < sSize) \|\| (grow(lenNew))) {
	227	if (lenSep) {
	228	s[sLen] = sep;
	229	sLen++;
	230	}
	231	memcpy(&s[sLen], sOther, sLenOther);
	232	sLen += sLenOther;
	233	s[sLen] = '\0';
	234	}
	235	return *this;
	236	}
	237	SString &operator+=(const char *sOther) {
	238	return append(sOther, static_cast<lenpos_t>(measure_length));
	239	}
	240	SString &operator+=(const SString &sOther) {
	241	return append(sOther.s, sOther.sLen);
	242	}
	243	SString &operator+=(char ch) {
	244	return append(&ch, 1);
	245	}
	246	SString &appendwithseparator(const char *sOther, char sep) {
	247	return append(sOther, strlen(sOther), sep);
	248	}
	249	SString &insert(lenpos_t pos, const char *sOther, lenpos_t sLenOther=measure_length) {
	250	if (!sOther) {
	251	return *this;
	252	}
	253	if (sLenOther == measure_length) {
	254	sLenOther = strlen(sOther);
	255	}
	256	lenpos_t lenNew = sLen + sLenOther;
	257	// Conservative about growing the buffer: don't do it, unless really needed
	258	if ((lenNew + 1 < sSize) \|\| grow(lenNew)) {
	259	lenpos_t moveChars = sLen - pos + 1;
	260	for (lenpos_t i = moveChars; i > 0; i--) {
	261	s[pos + sLenOther + i - 1] = s[pos + i - 1];
	262	}
	263	memcpy(s + pos, sOther, sLenOther);
	264	sLen = lenNew;
	265	}
	266	return *this;
	267	}
	268	/** Remove @a len characters from the @a pos position, included.
	269	* Characters at pos + len and beyond replace characters at pos.
	270	* If @a len is 0, or greater than the length of the string
	271	* starting at @a pos, the string is just truncated at @a pos.
	272	*/
	273	void remove(lenpos_t pos, lenpos_t len) {
	274	if (len < 1 \|\| pos + len >= sLen) {
	275	s[pos] = '\0';
	276	sLen = pos;
	277	} else {
	278	for (lenpos_t i = pos; i < sLen - len + 1; i++) {
	279	s[i] = s[i+len];
	280	}
	281	sLen -= len;
	282	}
	283	}
	284	SString &change(lenpos_t pos, char ch) {
	285	if (pos >= sLen) { // character changed must be in string bounds
	286	return *this;
	287	}
	288	*(s + pos) = ch;
	289	return *this;
	290	}
	291	/** Read an integral numeric value from the string. */
	292	int value() const {
	293	if (s)
	294	return atoi(s);
	295	else
	296	return 0;
	297	}
	298	int search(const char *sFind, lenpos_t start=0) const {
	299	if (start < sLen) {
	300	const char *sFound = strstr(s + start, sFind);
	301	if (sFound) {
	302	return sFound - s;
	303	}
	304	}
	305	return -1;
	306	}
	307	bool contains(const char *sFind) {
	308	return search(sFind) >= 0;
	309	}
	310	int substitute(char chFind, char chReplace) {
	311	int c = 0;
	312	char *t = s;
	313	while (t) {
	314	t = strchr(t, chFind);
	315	if (t) {
	316	*t = chReplace;
	317	t++;
	318	c++;
	319	}
	320	}
	321	return c;
	322	}
	323	int substitute(const char sFind, const char sReplace) {
	324	int c = 0;
	325	lenpos_t lenFind = strlen(sFind);
	326	lenpos_t lenReplace = strlen(sReplace);
	327	int posFound = search(sFind);
	328	while (posFound >= 0) {
	329	remove(posFound, lenFind);
	330	insert(posFound, sReplace, lenReplace);
	331	posFound = search(sFind, posFound + lenReplace);
	332	c++;
	333	}
	334	return c;
	335	}
	336	int remove(const char *sFind) {
	337	return substitute(sFind, "");
	338	}
	339	/**
	340	* Duplicate a C string.
	341	* Allocate memory of the given size, or big enough to fit the string if length isn't given;
	342	* then copy the given string in the allocated memory.
	343	* @return the pointer to the new string
	344	*/
	345	static char *StringAllocate(
	346	const char *s, ///< The string to duplicate
	347	lenpos_t len=measure_length) ///< The length of memory to allocate. Optional.
	348	{
	349	if (s == 0) {
	350	return 0;
	351	}
	352	if (len == measure_length) {
	353	len = strlen(s);
	354	}
	355	char *sNew = new char[len + 1];
	356	if (sNew) {
	357	memcpy(sNew, s, len);
	358	sNew[len] = '\0';
	359	}
	360	return sNew;
	361	}
	362	};
	363
	364	/**
	365	* Duplicate a C string.
	366	* Allocate memory of the given size, or big enough to fit the string if length isn't given;
	367	* then copy the given string in the allocated memory.
	368	* @return the pointer to the new string
	369	*/
	370	inline char *StringDup(
	371	const char *s, ///< The string to duplicate
	372	SString::lenpos_t len=SString::measure_length) ///< The length of memory to allocate. Optional.
	373	{
	374	return SString::StringAllocate(s, len);
	375	}
	376
	377	#endif