X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/9e730a78765d0e70ca5b77512569c94585070fe2..80a779275ae04443c568dca919adb26cf6f5002c:/src/stc/scintilla/include/SString.h?ds=sidebyside

diff --git a/src/stc/scintilla/include/SString.h b/src/stc/scintilla/include/SString.h
index 01602df781..38a206ccf2 100644
--- a/src/stc/scintilla/include/SString.h
+++ b/src/stc/scintilla/include/SString.h
@@ -2,7 +2,7 @@
 /** @file SString.h
  ** A simple string class.
  **/
-// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
+// Copyright 1998-2004 by Neil Hodgson <neilh@scintilla.org>
 // The License.txt file describes the conditions under which this software may be distributed.
 
 #ifndef SSTRING_H
@@ -18,100 +18,148 @@ bool EqualCaseInsensitive(const char *a, const char *b);
 // 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 {
+ * Base class from which the two other classes (SBuffer & SString)
+ * are derived.
+ */
+class SContainer {
 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:
+protected:
 	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;
+
+	SContainer() : s(0), sSize(0) {}
+	~SContainer() {
+		delete []s;	// Suppose it was allocated using StringAllocate
+		s = 0;
+		sSize = 0;
+	}
+	/** Size of buffer. */
+	lenpos_t size() const {
+		if (s) {
+			return sSize;
+		} else {
+			return 0;
 		}
-		return sNew != 0;
 	}
+public:
+	/**
+	 * Allocate uninitialized memory big enough to fit a string of the given length.
+	 * @return the pointer to the new string
+	 */
+	static char *StringAllocate(lenpos_t len);
+	/**
+	 * Duplicate a buffer/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.
+};
 
-	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_;
+
+/**
+ * @brief A string buffer class.
+ *
+ * Main use is to ask an API the length of a string it can provide,
+ * then to allocate a buffer of the given size, and to provide this buffer
+ * to the API to put the string.
+ * This class is intended to be shortlived, to be transformed as SString
+ * as soon as it holds the string, so it has little members.
+ * Note: we assume the buffer is filled by the API. If the length can be shorter,
+ * we should set sLen to strlen(sb.ptr()) in related SString constructor and assignment.
+ */
+class SBuffer : protected SContainer {
+public:
+	SBuffer(lenpos_t len) {
+		s = StringAllocate(len);
+		if (s) {
+			*s = '\0';
+		sSize = len;
 		} else {
+			sSize = 0;
+		}
+	}
+private:
+	/// Copy constructor
+	// Here only to be on the safe size, user should avoid returning SBuffer values.
+	SBuffer(const SBuffer &source) : SContainer() {
+		s = StringAllocate(source.s, source.sSize);
+		sSize = (s) ? source.sSize : 0;
+	}
+	/// Default assignment operator
+	// Same here, shouldn't be used
+	SBuffer &operator=(const SBuffer &source) {
+		if (this != &source) {
 			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;
-			}
+			s = StringAllocate(source.s, source.sSize);
+			sSize = (s) ? source.sSize : 0;
 		}
 		return *this;
 	}
-
 public:
-	SString() : s(0), sSize(0), sLen(0), sizeGrowth(sizeGrowthDefault) {
+	/** Provide direct read/write access to buffer. */
+	char *ptr() {
+	    return s;
 	}
-	SString(const SString &source) : sizeGrowth(sizeGrowthDefault) {
-		s = StringAllocate(source.s);
-		sSize = sLen = (s) ? strlen(s) : 0;
+	/** Ownership of the buffer have been taken, so release it. */
+	void reset() {
+		s = 0;
+		sSize = 0;
+	}
+	/** Size of buffer. */
+	lenpos_t size() const {
+		return SContainer::size();
+	}
+};
+
+
+/**
+ * @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 : protected SContainer {
+	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);
+	SString &assign(const char *sOther, lenpos_t sSize_=measure_length);
+
+public:
+	SString() : sLen(0), sizeGrowth(sizeGrowthDefault) {}
+	SString(const SString &source) : SContainer(), sizeGrowth(sizeGrowthDefault) {
+		s = StringAllocate(source.s, source.sLen);
+		sSize = sLen = (s) ? source.sLen : 0;
 	}
 	SString(const char *s_) : sizeGrowth(sizeGrowthDefault) {
 		s = StringAllocate(s_);
 		sSize = sLen = (s) ? strlen(s) : 0;
 	}
+	SString(SBuffer &buf) : sizeGrowth(sizeGrowthDefault) {
+		s = buf.ptr();
+		sSize = sLen = buf.size();
+		// Consumes the given buffer!
+		buf.reset();
+	}
 	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;
+		sSize = sLen = (s) ? last - first : 0;
 	}
+	SString(int i);
+	SString(double d, int precision);
 	~SString() {
-		delete []s;
-		s = 0;
-		sSize = 0;
 		sLen = 0;
 	}
 	void clear() {
@@ -122,58 +170,41 @@ public:
 	}
 	/** Size of buffer. */
 	lenpos_t size() const {
-		if (s)
-			return sSize;
-		else
-			return 0;
+		return SContainer::size();
 	}
 	/** Size of string in buffer. */
 	lenpos_t length() const {
 		return sLen;
 	}
+	/** Read access to a character of the string. */
+	char operator[](lenpos_t i) const {
+		return (s && i < sSize) ? s[i] : '\0';
+	}
 	SString &operator=(const char *source) {
 		return assign(source);
 	}
 	SString &operator=(const SString &source) {
 		if (this != &source) {
-			assign(source.c_str());
+			assign(source.s, source.sLen);
 		}
 		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;
 	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;
 	bool operator!=(const char *sOther) const {
 		return !operator==(sOther);
 	}
-	bool contains(char ch) {
-		if (s && *s)
-			return strchr(s, ch) != 0;
-		else
-			return false;
+	bool contains(char ch) const {
+		return (s && *s) ? strchr(s, ch) != 0 : false;
 	}
 	void setsizegrowth(lenpos_t sizeGrowth_) {
 		sizeGrowth = sizeGrowth_;
 	}
 	const char *c_str() const {
-		if (s)
-			return s;
-		else
-			return "";
+		return s ? s : "";
 	}
 	/** Give ownership of buffer to caller which must use delete[] to free buffer. */
 	char *detach() {
@@ -183,57 +214,10 @@ public:
 		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 substr(lenpos_t subPos, lenpos_t subLen=measure_length) const;
+	SString &lowercase(lenpos_t subPos = 0, lenpos_t subLen=measure_length);
+	SString &uppercase(lenpos_t subPos = 0, lenpos_t subLen=measure_length);
+	SString &append(const char *sOther, lenpos_t sLenOther=measure_length, char sep = '\0');
 	SString &operator+=(const char *sOther) {
 		return append(sOther, static_cast<lenpos_t>(measure_length));
 	}
@@ -246,121 +230,40 @@ public:
 	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.
+	SString &insert(lenpos_t pos, const char *sOther, lenpos_t sLenOther=measure_length);
+
+	/**
+	 * 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;
-		}
-	}
+	void remove(lenpos_t pos, lenpos_t len);
+
 	SString &change(lenpos_t pos, char ch) {
-		if (pos >= sLen) {					// character changed must be in string bounds
-			return *this;
+		if (pos < sLen) {					// character changed must be in string bounds
+			*(s + pos) = ch;
 		}
-		*(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;
+		return s ? atoi(s) : 0;
 	}
-	bool contains(const char *sFind) {
+	bool startswith(const char *prefix);
+	bool endswith(const char *suffix);
+	int search(const char *sFind, lenpos_t start=0) const;
+	bool contains(const char *sFind) const {
 		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 substitute(char chFind, char chReplace);
+	int substitute(const char *sFind, const char *sReplace);
 	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;
@@ -369,9 +272,9 @@ public:
  */
 inline char *StringDup(
 	const char *s,			///< The string to duplicate
-	SString::lenpos_t len=SString::measure_length)	///< The length of memory to allocate. Optional.
+	SContainer::lenpos_t len=SContainer::measure_length)	///< The length of memory to allocate. Optional.
 {
-	return SString::StringAllocate(s, len);
+	return SContainer::StringAllocate(s, len);
 }
 
 #endif