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

diff --git a/contrib/src/stc/scintilla/include/SString.h b/contrib/src/stc/scintilla/include/SString.h
index aeb5940502e7c8df95efdcd8b5024e002be56e39..38a206ccf2240224ce1dbdd3236c727ab54babc9 100644 (file)
--- a/contrib/src/stc/scintilla/include/SString.h
+++ b/contrib/src/stc/scintilla/include/SString.h
@@ -2,15 +2,15 @@
 /** @file SString.h
  ** A simple string class.
  **/
 /** @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
 #define SSTRING_H
 
 // 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
+// These functions are implemented because each platform calls them something different.

 int CompareCaseInsensitive(const char *a, const char *b);
 int CompareCaseInsensitive(const char *a, const char *b);

-int CompareNCaseInsensitive(const char *a, const char *b, int len);
+int CompareNCaseInsensitive(const char *a, const char *b, size_t len);

 bool EqualCaseInsensitive(const char *a, const char *b);
 
 // Define another string class.
 bool EqualCaseInsensitive(const char *a, const char *b);
 
 // Define another string class.


@@ -18,158 +18,193 @@ bool EqualCaseInsensitive(const char *a, const char *b);
 // An SString may contain embedded nul characters.
 
 /**
 // An SString may contain embedded nul characters.
 
 /**

- * 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
+ * Base class from which the two other classes (SBuffer & SString)
+ * are derived.

  */
  */

-inline char *StringDup(
-       const char *s,  ///< The string to duplicate
-       int len=-1)             ///< The length of memory to allocate. Optional.
-{
-       if (!s)
-               return 0;
-       if (len == -1)
-               len = strlen(s);
-       char *sNew = new char[len + 1];
-       if (sNew) {
-               strncpy(sNew, s, len);
-               sNew[len] = '\0';
-       }
-       return sNew;
-}
+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};
+
+protected:
+       char *s;                                ///< The C string
+       lenpos_t sSize;                 ///< The size of the buffer, less 1: ie. the maximum size of the string
+
+       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;
+               }
+       }
+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.
+};
+
+
+/**
+ * @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(source.s, source.sSize);
+                       sSize = (s) ? source.sSize : 0;
+               }
+               return *this;
+       }
+public:
+       /** Provide direct read/write access to buffer. */
+       char *ptr() {
+           return s;
+       }
+       /** 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.
 
 /**
  * @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.
  * 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 {
-       char *s;                        ///< The C string
-       int sSize;      ///< The size of the buffer, less 1: ie. the maximum size of the string
-       int sLen;       ///< The size of the string in s
-       int sizeGrowth; ///< Minimum growth size when appending strings
+ * 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 };
 
        enum { sizeGrowthDefault = 64 };
 

-public:
-       typedef int size_type;
+       bool grow(lenpos_t lenNew);
+       SString &assign(const char *sOther, lenpos_t sSize_=measure_length);

 
 

-       SString() : s(0), sSize(0), sLen(0), sizeGrowth(sizeGrowthDefault) {
-       }
-       SString(const SString &source) : sizeGrowth(sizeGrowthDefault) {
-               s = StringDup(source.s);
-               sSize = sLen = (s) ? strlen(s) : 0;
+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) {
        }
        SString(const char *s_) : sizeGrowth(sizeGrowthDefault) {

-               s = StringDup(s_);
+               s = StringAllocate(s_);

                sSize = sLen = (s) ? strlen(s) : 0;
        }
                sSize = sLen = (s) ? strlen(s) : 0;
        }

-       SString(const char *s_, int first, int last) : sizeGrowth(sizeGrowthDefault) {
-               s = StringDup(s_ + first, last - first);
-               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(int i) : sizeGrowth(sizeGrowthDefault) {
-               char number[32];
-               sprintf(number, "%0d", i);
-               s = StringDup(number);
-               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) ? last - first : 0;

        }
        }

+       SString(int i);
+       SString(double d, int precision);

        ~SString() {
        ~SString() {

-               delete []s;
-               s = 0;
-               sSize = 0;

                sLen = 0;
        }
                sLen = 0;
        }

-       void clear(void) {
+       void clear() {

                if (s) {
                        *s = '\0';
                }
                sLen = 0;
        }
        /** Size of buffer. */
                if (s) {
                        *s = '\0';
                }
                sLen = 0;
        }
        /** Size of buffer. */

-       size_type size(void) const {    ///<
-               if (s)
-                       return sSize;
-               else
-                       return 0;
+       lenpos_t size() const {
+               return SContainer::size();

        }
        /** Size of string in buffer. */
        }
        /** Size of string in buffer. */

-       int length() const {
+       lenpos_t length() const {

                return sLen;
        }
                return sLen;
        }

-       SString &assign(const char* sOther, int sSize_ = -1) {
-               if (!sOther) {
-                       sSize_ = 0;
-               }
-               if (sSize_ < 0) {
-                       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 = StringDup(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;
-       }
-       SString &assign(const SString& sOther, int sSize_ = -1) {
-               return assign(sOther.s, sSize_);
+       /** 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) {
        }
        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;
        }
                }
                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 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 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(int sizeGrowth_) {
+       void setsizegrowth(lenpos_t sizeGrowth_) {

                sizeGrowth = sizeGrowth_;
        }
        const char *c_str() const {
                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() {
        }
        /** Give ownership of buffer to caller which must use delete[] to free buffer. */
        char *detach() {


@@ -179,77 +214,67 @@ public:
                sLen = 0;
                return sRet;
        }
                sLen = 0;
                return sRet;
        }

-       char operator[](int 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, int sLenOther=-1, char sep=0) {
-               if (sLenOther < 0)
-                       sLenOther = strlen(sOther);
-               int lenSep = 0;
-               if (sLen && sep)        // Only add a separator if not empty
-                       lenSep = 1;
-               int lenNew = sLen + sLenOther + lenSep;
-               if (lenNew + 1 < sSize) {
-                       // Conservative about growing the buffer: don't do it, unless really needed
-                       if (lenSep) {
-                               s[sLen] = sep;
-                               sLen++;
-                       }
-                       strncpy(&s[sLen], sOther, sLenOther);
-                       s[sLen + sLenOther] = '\0';
-                       sLen += sLenOther;
-               } else {
-                       // Grow the buffer bigger than really needed, to have room for other appends
-                       char *sNew = new char[lenNew + sizeGrowth + 1];
-                       if (sNew) {
-                               if (s) {
-                                       memcpy(sNew, s, sLen);
-                                       delete []s;
-                               }
-                               s = sNew;
-                               sSize = lenNew + sizeGrowth;
-                               if (lenSep) {
-                                       s[sLen] = sep;
-                                       sLen++;
-                               }
-                               strncpy(&s[sLen], sOther, sLenOther);
-                               sNew[sLen + sLenOther] = '\0';
-                               sLen += sLenOther;
-                       }
-               }
-               return *this;
-       }
-       SString &operator +=(const char *sOther) {
-               return append(sOther, -1);
+       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));

        }
        }

-       SString &operator +=(const SString &sOther) {
-               return append(sOther.s, sOther.sSize);
+       SString &operator+=(const SString &sOther) {
+               return append(sOther.s, sOther.sLen);

        }
        }

-       SString &operator +=(char ch) {
+       SString &operator+=(char ch) {

                return append(&ch, 1);
        }
                return append(&ch, 1);
        }

-       SString &appendwithseparator(const char* sOther, char sep) {
+       SString &appendwithseparator(const char *sOther, char sep) {

                return append(sOther, strlen(sOther), sep);
        }
                return append(sOther, strlen(sOther), sep);
        }

+       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);
+
+       SString &change(lenpos_t pos, char ch) {
+               if (pos < sLen) {                                       // character changed must be in string bounds
+                       *(s + pos) = ch;
+               }
+               return *this;
+       }
+       /** Read an integral numeric value from the string. */

        int value() const {
        int value() const {

-               if (s)
-                       return atoi(s);
-               else
-                       return 0;
+               return s ? atoi(s) : 0;

        }
        }

-       void substitute(char find, char replace) {
-               char *t = s;
-               while (t) {
-                       t = strchr(t, find);
-                       if (t) {
-                               *t = replace;
-                               t++;
-                       }
-               }
+       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 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
+ */
+inline char *StringDup(
+       const char *s,                  ///< The string to duplicate
+       SContainer::lenpos_t len=SContainer::measure_length)    ///< The length of memory to allocate. Optional.
+{
+       return SContainer::StringAllocate(s, len);
+}
+

 #endif
 #endif