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authorWilliam R. Otte <wotte@dre.vanderbilt.edu>2006-07-24 15:50:30 +0000
committerWilliam R. Otte <wotte@dre.vanderbilt.edu>2006-07-24 15:50:30 +0000
commitc44379cc7d9c7aa113989237ab0f56db12aa5219 (patch)
tree66a84b20d47f2269d8bdc6e0323f338763424d3a /ACE/ace/SString.h
parent3aff90f4a822fcf5d902bbfbcc9fa931d6191a8c (diff)
downloadATCD-c44379cc7d9c7aa113989237ab0f56db12aa5219.tar.gz
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+// -*- C++ -*-
+
+//=============================================================================
+/**
+ * @file SString.h
+ *
+ * $Id$
+ *
+ * @author Douglas C. Schmidt (schmidt@cs.wustl.edu)
+ */
+//=============================================================================
+
+#ifndef ACE_SSTRING_H
+#define ACE_SSTRING_H
+#include /**/ "ace/pre.h"
+
+#include "ace/SStringfwd.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#include "ace/String_Base.h"
+
+#if !defined (ACE_DEFAULT_GROWSIZE)
+#define ACE_DEFAULT_GROWSIZE 32
+#endif /* ACE_DEFAULT_GROWSIZE */
+
+#if !defined (ACE_LACKS_IOSTREAM_TOTALLY)
+#include "ace/iosfwd.h"
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+ACE_Export ACE_OSTREAM_TYPE &operator << (ACE_OSTREAM_TYPE &, const ACE_CString &);
+ACE_Export ACE_OSTREAM_TYPE &operator << (ACE_OSTREAM_TYPE &, const ACE_WString &);
+ACE_END_VERSIONED_NAMESPACE_DECL
+#endif /* ! ACE_LACKS_IOSTREAM_TOTALLY */
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+#if defined ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION_EXPORT
+template class ACE_Export ACE_String_Base<char>;
+template class ACE_Export ACE_String_Base<ACE_WSTRING_TYPE>;
+#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION_EXPORT */
+
+/**
+ * @class ACE_NS_WString
+ *
+ * @brief This class retain the backward compatibility for
+ * ACE_Naming_Context and related classes. The only addition to
+ * ACE_WString is a very naive "wchar" to "char" conversion
+ * function.
+ */
+class ACE_Export ACE_NS_WString : public ACE_WString
+{
+public:
+
+ using ACE_WString::size_type;
+
+ /// Default constructor.
+ ACE_NS_WString (ACE_Allocator *alloc = 0);
+
+ /// Constructor that copies @a s into dynamically allocated memory.
+ ACE_NS_WString (const char *s,
+ ACE_Allocator *alloc = 0);
+
+ /// Constructor that copies @a s into dynamically allocated memory.
+ ACE_NS_WString (const ACE_WSTRING_TYPE *s,
+ ACE_Allocator *alloc = 0);
+
+#if defined (ACE_WSTRING_HAS_USHORT_SUPPORT)
+ /// Constructor that takes in a ushort16 string (mainly used by the
+ /// ACE Name_Space classes)
+ ACE_NS_WString (const ACE_USHORT16 *s,
+ size_type len,
+ ACE_Allocator *alloc = 0);
+#endif /* ACE_WSTRING_HAS_USHORT_SUPPORT */
+
+ /// Constructor that copies @a len ACE_WSTRING_TYPE's of @a s into dynamically
+ /// allocated memory (will NUL terminate the result).
+ ACE_NS_WString (const ACE_WSTRING_TYPE *s,
+ size_type len,
+ ACE_Allocator *alloc = 0);
+
+ /// Constructor that dynamically allocates memory for @a len + 1
+ /// ACE_WSTRING_TYPE characters. The newly created memory is set memset to 0.
+ ACE_NS_WString (size_type len, ACE_Allocator *alloc = 0);
+
+ /// Copy constructor.
+ ACE_NS_WString (const ACE_NS_WString &s);
+
+ /// Constructor that copies @a c into dynamically allocated memory.
+ ACE_NS_WString (ACE_WSTRING_TYPE c, ACE_Allocator *alloc = 0);
+
+ /// Transform into a copy of the ASCII character representation.
+ /// (caller must delete)
+ char *char_rep (void) const;
+
+ /// Transform into a copy of a USHORT16 representation (caller must
+ /// delete). Note, behavior is undefined when sizeof (wchar_t) != 2.
+ ACE_USHORT16 *ushort_rep (void) const;
+};
+
+ACE_INLINE ACE_Export
+ACE_NS_WString operator + (const ACE_NS_WString &,
+ const ACE_NS_WString &);
+
+// -----------------------------------------------------------------
+
+/**
+ * @class ACE_SString
+ *
+ * @brief A very Simple String ACE_SString class. This is not a
+ * general-purpose string class, and you should probably consider
+ * using ACE_CString is you don't understand why this class
+ * exists...
+ *
+ * This class is optimized for efficiency, so it doesn't provide
+ * any internal locking.
+ * CAUTION: This class is only intended for use with applications
+ * that understand how it works. In particular, its destructor
+ * does not deallocate its memory when it is destroyed... We need
+ * this class since the ACE_Map_Manager requires an object that
+ * supports the operator == and operator !=. This class uses an
+ * ACE_Allocator to allocate memory. The user can make this a
+ * persistant class by providing an ACE_Allocator with a
+ * persistable memory pool.
+ */
+class ACE_Export ACE_SString
+{
+public:
+
+ typedef ACE_Allocator::size_type size_type;
+
+ /// No position constant
+ static const size_type npos;
+
+ /// Default constructor.
+ ACE_SString (ACE_Allocator *alloc = 0);
+
+ /// Constructor that copies @a s into dynamically allocated memory.
+ ACE_SString (const char *s, ACE_Allocator *alloc = 0);
+
+ /// Constructor that copies @a len chars of @s into dynamically
+ /// allocated memory (will NUL terminate the result).
+ ACE_SString (const char *s, size_type len, ACE_Allocator *alloc = 0);
+
+ /// Copy constructor.
+ ACE_SString (const ACE_SString &);
+
+ /// Constructor that copies @a c into dynamically allocated memory.
+ ACE_SString (char c, ACE_Allocator *alloc = 0);
+
+ /// Default destructor.
+ ~ACE_SString (void);
+
+ /// Return the <slot'th> character in the string (doesn't perform
+ /// bounds checking).
+ char operator [] (size_type slot) const;
+
+ /// Return the <slot'th> character by reference in the string
+ /// (doesn't perform bounds checking).
+ char &operator [] (size_type slot);
+
+ /// Assignment operator (does copy memory).
+ ACE_SString &operator = (const ACE_SString &);
+
+ /**
+ * Return a substring given an offset and length, if length == npos
+ * use rest of str return empty substring if offset or offset/length
+ * are invalid
+ */
+ ACE_SString substring (size_type offset, size_type length = npos) const;
+
+ /// Same as substring
+ ACE_SString substr (size_type offset, size_type length = npos) const;
+
+ /// Returns a hash value for this string.
+ u_long hash (void) const;
+
+ /// Return the length of the string.
+ size_type length (void) const;
+
+ /// Set the underlying pointer. Since this does not copy memory or
+ /// delete existing memory use with extreme caution!!!
+ void rep (char *s);
+
+ /// Get the underlying pointer.
+ const char *rep (void) const;
+
+ /// Get the underlying pointer.
+ const char *fast_rep (void) const;
+
+ /// Same as STL String's <c_str> and <fast_rep>.
+ const char *c_str (void) const;
+
+ /// Comparison operator that will match substrings. Returns the
+ /// slot of the first location that matches, else @c npos.
+ size_type strstr (const ACE_SString &s) const;
+
+ /// Find <str> starting at pos. Returns the slot of the first
+ /// location that matches (will be >= pos), else npos.
+ size_type find (const ACE_SString &str, size_type pos = 0) const;
+
+ /// Find <s> starting at pos. Returns the slot of the first
+ /// location that matches (will be >= pos), else npos.
+ size_type find (const char *s, size_type pos = 0) const;
+
+ /// Find <c> starting at pos. Returns the slot of the first
+ /// location that matches (will be >= pos), else npos.
+ size_type find (char c, size_type pos = 0) const;
+
+ /// Find <c> starting at pos (counting from the end). Returns the
+ /// slot of the first location that matches, else npos.
+ size_type rfind (char c, size_type pos = npos) const;
+
+ /// Equality comparison operator (must match entire string).
+ bool operator == (const ACE_SString &s) const;
+
+ /// Less than comparison operator.
+ bool operator < (const ACE_SString &s) const;
+
+ /// Greater than comparison operator.
+ bool operator > (const ACE_SString &s) const;
+
+ /// Inequality comparison operator.
+ bool operator != (const ACE_SString &s) const;
+
+ /// Performs a <strcmp>-style comparison.
+ int compare (const ACE_SString &s) const;
+
+ /// Dump the state of an object.
+ void dump (void) const;
+
+ /// Declare the dynamic allocation hooks.
+ ACE_ALLOC_HOOK_DECLARE;
+
+private:
+ /// Pointer to a memory allocator.
+ ACE_Allocator *allocator_;
+
+ /// Length of the ACE_SString (not counting the trailing '\0').
+ size_type len_;
+
+ /// Pointer to data.
+ char *rep_;
+};
+
+#if !defined (ACE_LACKS_IOSTREAM_TOTALLY)
+ACE_Export ACE_OSTREAM_TYPE &operator << (ACE_OSTREAM_TYPE &, const ACE_SString &);
+#endif /* ! ACE_LACKS_IOSTREAM_TOTALLY */
+
+// This allows one to use W or C String based on the Unicode
+// setting
+#if defined (ACE_USES_WCHAR)
+typedef ACE_WString ACE_TString;
+#else /* ACE_USES_WCHAR */
+typedef ACE_CString ACE_TString;
+#endif /* ACE_USES_WCHAR */
+
+
+// ************************************************************
+
+/**
+ * @class ACE_Tokenizer
+ *
+ * @brief Tokenizer
+ *
+ * Tokenizes a buffer. Allows application to set delimiters and
+ * preserve designators. Does not allow special characters, yet
+ * (e.g., printf ("\"like a quoted string\"")).
+ */
+class ACE_Export ACE_Tokenizer
+{
+public:
+ /**
+ * \a buffer will be parsed. Notice that ACE_Tokenizer will modify
+ * \a buffer if you use <code> delimiter_replace </code> or <code>
+ * preserve_designators </code> to do character substitution.
+ * @note You should NOT pass a constant string or string literal
+ * to this constructor, since ACE_Tokenizer will try to modify
+ * the string.
+ * \sa preserve_designators
+ * \sa preserve_designators
+ */
+ ACE_Tokenizer (ACE_TCHAR *buffer);
+
+ /**
+ * \a d is a delimiter.
+ * \return Returns 0 on success, -1 if there is no memory left.
+ *
+ * <B>Example:</B>
+ * \verbatim
+ char buf[30];
+ ACE_OS::strcpy(buf, "William/Joseph/Hagins");
+
+ ACE_Tokenizer tok (buf);
+ tok.delimiter ('/');
+ for (char *p = tok.next (); p; p = tok.next ())
+ cout << p << endl;
+ \endverbatim
+ *
+ * This will print out:
+ * \verbatim
+ William/Joseph/Hagins
+ Joseph/Hagins
+ Hagins \endverbatim
+ */
+ int delimiter (ACE_TCHAR d);
+
+ /**
+ * \a d is a delimiter and, when found, will be replaced by
+ * \a replacement.
+ * \return 0 on success, -1 if there is no memory left.
+ *
+ * <B>Example:</B>
+ * \verbatim
+ char buf[30];
+ ACE_OS::strcpy(buf, "William/Joseph/Hagins");
+
+ ACE_Tokenizer tok (buf);
+ tok.delimiter_replace ('/', 0);
+ for (char *p = tok.next (); p; p = tok.next ())
+ cout << p << endl;
+ \endverbatim
+ *
+ * This will print out:
+ * \verbatim
+ William
+ Joseph
+ Hagins \endverbatim
+ */
+ int delimiter_replace (ACE_TCHAR d, ACE_TCHAR replacement);
+
+ /**
+ * Extract string between a pair of designator characters.
+ * For instance, quotes, or '(' and ')'.
+ * \a start specifies the begin designator.
+ * \a stop specifies the end designator.
+ * \a strip If \a strip == 1, then the preserve
+ * designators will be stripped from the tokens returned by next.
+ * \return 0 on success, -1 if there is no memory left.
+ *
+ * <B>Example with strip = 0:</B>
+ * \verbatim
+ char buf[30];
+ ACE_OS::strcpy(buf, "William(Joseph)Hagins");
+
+ ACE_Tokenizer tok (buf);
+ tok.preserve_designators ('(', ')', 0);
+ for (char *p = tok.next (); p; p = tok.next ())
+ cout << p << endl;
+ \endverbatim
+ *
+ * This will print out:
+ * \verbatim
+ William(Joseph)Hagins
+ (Joseph)Hagins
+ )Hagins \endverbatim
+ *
+ * <B>Example with strip = 1:</B>
+ * \verbatim
+ char buf[30];
+ ACE_OS::strcpy(buf, "William(Joseph)Hagins");
+
+ ACE_Tokenizer tok (buf);
+ tok.preserve_designators ('(', ')', 1);
+ for (char *p = tok.next (); p; p = tok.next ())
+ cout << p << endl;
+ \endverbatim
+ *
+ * This will print out:
+ * \verbatim
+ William
+ Joseph
+ Hagins \endverbatim
+ */
+ int preserve_designators (ACE_TCHAR start, ACE_TCHAR stop, int strip=1);
+
+ /// Returns the next token.
+ ACE_TCHAR *next (void);
+
+ enum {
+ MAX_DELIMITERS=16,
+ MAX_PRESERVES=16
+ };
+
+protected:
+ /// Returns 1 if <d> is a delimiter, 0 otherwise. If <d> should be
+ /// replaced with <r>, <replace> is set to 1, otherwise 0.
+ int is_delimiter (ACE_TCHAR d, int &replace, ACE_TCHAR &r);
+
+ /**
+ * If <start> is a start preserve designator, returns 1 and sets
+ * <stop> to the stop designator. Returns 0 if <start> is not a
+ * preserve designator.
+ */
+ int is_preserve_designator (ACE_TCHAR start, ACE_TCHAR &stop, int &strip);
+
+ ACE_TCHAR *buffer_;
+ int index_;
+
+ /**
+ * @class Preserve_Entry
+ *
+ * @brief Preserve Entry
+ *
+ * Defines a set of characters that designate an area that
+ * should not be parsed, but should be treated as a complete
+ * token. For instance, in: (this is a preserve region), start
+ * would be a left paren -(- and stop would be a right paren
+ * -)-. The strip determines whether the designators should be
+ * removed from the token.
+ */
+ class Preserve_Entry
+ {
+ public:
+ /**
+ * E.g., "(".
+ * E.g., ")".
+ * Whether the designators should be removed from the token.
+ */
+ ACE_TCHAR start_;
+ ACE_TCHAR stop_;
+ int strip_;
+ };
+
+ /// The application can specify MAX_PRESERVES preserve designators.
+ Preserve_Entry preserves_[MAX_PRESERVES];
+
+ /// Pointer to the next free spot in preserves_.
+ int preserves_index_;
+
+ /**
+ * @class Delimiter_Entry
+ *
+ * @brief Delimiter Entry
+ *
+ * Describes a delimiter for the tokenizer.
+ */
+ class Delimiter_Entry
+ {
+ public:
+ /**
+ * Most commonly a space ' '.
+ * What occurrences of delimiter_ should be replaced with.
+ * Whether replacement_ should be used. This should be replaced
+ * with a technique that sets replacement_ = delimiter by
+ * default. I'll do that next iteration.
+ */
+ ACE_TCHAR delimiter_;
+ ACE_TCHAR replacement_;
+ int replace_;
+ };
+
+ /// The tokenizer allows MAX_DELIMITERS number of delimiters.
+ Delimiter_Entry delimiters_[MAX_DELIMITERS];
+
+ /// Pointer to the next free space in delimiters_.
+ int delimiter_index_;
+};
+
+// ****************************************************************
+
+/**
+ * @class ACE_Auto_String_Free
+ *
+ * @brief Simple class to automatically de-allocate strings
+ *
+ * Keeps a pointer to a string and deallocates it (using
+ * <ACE_OS::free>) on its destructor.
+ * If you need to delete using "delete[]" the
+ * ACE_Auto_Array_Ptr<char> is your choice.
+ * The class plays the same role as auto_ptr<>
+ */
+class ACE_Export ACE_Auto_String_Free
+{
+public:
+ explicit ACE_Auto_String_Free (char* p = 0);
+ ACE_Auto_String_Free (ACE_Auto_String_Free &rhs);
+ ACE_Auto_String_Free& operator= (ACE_Auto_String_Free &rhs);
+ ~ACE_Auto_String_Free (void);
+
+ char* operator* () const;
+ char operator[] (size_t i) const;
+ char* get (void) const;
+ char* release (void);
+ void reset (char* p = 0);
+
+private:
+ char* p_;
+};
+
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+#if defined (__ACE_INLINE__)
+#include "ace/SString.inl"
+#endif /* __ACE_INLINE__ */
+
+#include /**/ "ace/post.h"
+#endif /* ACE_SSTRING_H */