gclib/gclib/GStr.h

//---------------------------------------------------------------------------
#ifndef GSTR_H
#define GSTR_H
//---------------------------------------------------------------------------
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "GBase.h"

// This class uses reference counting and copy-on-write semantics

// All indexes are zero-based.  For all functions that accept an index, a
// negative index specifies an index from the right of the string.  Also,
// for all functions that accept a length, a length of -1 specifies the rest
// of the string.
enum enTokenizeMode {
 tkFullString,
 tkCharSet
 };

class GStr {
        friend GStr operator+(const char* s1, const GStr& s2);
        friend bool operator==(const char* s1, const GStr& s2);
        friend bool operator<(const char* s1, const GStr& s2);
        friend bool operator<=(const char* s1, const GStr& s2);
        friend bool operator>(const char* s1, const GStr& s2);
        friend bool operator>=(const char* s1, const GStr& s2);
        friend bool operator!=(const char* s1, const GStr& s2);
        friend void swap(GStr& s1, GStr& s2);
    public:
        GStr();
        GStr(const GStr& s);
        GStr(const char* s);
        GStr(const int i);
        GStr(const double f);
        GStr(char c, int n = 1);
        ~GStr();
        operator const char* () const { return my_data->chars;} //inline here
        char& operator[](int index);
        char operator[](int index) const;
        GStr& operator=(const GStr& s);
        GStr& operator=(const char* s);
        GStr& operator=(const int i);
        GStr& operator=(const double f);
        GStr operator+(const GStr& s) const;
        GStr operator+(const char* s) const;
        GStr operator+(const char c) const;
        GStr operator+(const int i) const;
        GStr operator+(const double f) const;
        bool operator==(const GStr& s) const;
        bool operator==(const char* s) const;
        bool operator<(const GStr& s) const;
        bool operator<(const char* s) const;
        bool operator<=(const GStr& s) const;
        bool operator<=(const char* s) const;
        bool operator>(const GStr& s) const;
        bool operator>(const char* s) const;
        bool operator>=(const GStr& s) const;
        bool operator>=(const char* s) const;
        bool operator!=(const GStr& s) const;
        bool operator!=(const char* s) const;
        GStr& operator+=(const GStr& s);
        GStr& operator+=(const char* s);
        GStr& operator+=(const char c);
        GStr& operator+=(const int i);
        GStr& operator+=(const double f);
      //interface:
      public:
        int length() const;
        bool is_empty() const;
        bool is_space() const;
        GStr substr(int index = 0, int len = -1) const;
        GStr to(char c); //return the first part up to first occurence of c
                           //or whole string if c not found
        GStr from(char c); //same as to, but starting from the right side
        GStr copy() const;
        GStr& format(const char *fmt,...);
        GStr& appendfmt(const char *fmt,...);
        GStr& cut(int index = 0, int len = -1); //delete a specified length
        GStr& remove(int from, int to) {
            return cut(from, to-from+1);
            }

        //paste a string at the specified position
        GStr& paste(const GStr& s, int index = 0, int len=-1);
        GStr& paste(const char* s, int index = 0, int len = -1);
        GStr& replace(const char* from, const char* to=NULL);
        GStr& insert(const GStr& s, int index = 0);
        GStr& insert(const char* s, int index = 0);
        GStr& append(const char* s);
        GStr& append(const GStr& s);
        GStr& upper();
        GStr& lower();
        GStr& clear();//make empty
        //character translation or removal:
        GStr& tr(const char* from, const char* to=NULL);
        //number of occurences of a char in the string:
        int count(char c);
        void startTokenize(const char* delimiter, enTokenizeMode tokenizemode=tkCharSet);
        bool nextToken(GStr& token);
        int asInt(int base=10);
        double asReal();
        double asDouble() { return asReal(); }
        bool asReal(double& r);
        bool asDouble(double& r) { return asReal(r); }
        bool asInt(int& r, int base=10);
        int index(const GStr& s, int start_index = 0) const;
        int index(const char* s, int start_index = 0) const;
        int index(char c, int start_index = 0) const;
        int rindex(char c) const;
        int rindex(const char* str) const;
        bool contains(const GStr& s) const;
        bool contains(const char* s) const;
        bool contains(char c) const;
        bool startsWith(const char* s) const;
        GStr split(const char* delim);
        GStr split(char c);
           /* splits "this" in two parts, at the first (leftmost)
                 encounter of delim:
                 1st would stay in "this"
                 (which this way is truncated)
                 2nd will go to the returned string
           */
        GStr splitr(const char* delim);
        GStr splitr(char c);
           /* splits "this" in two parts, at the last (rightmost)
                 encounter of delim:
                 1st would stay in "this"
                 2nd will be returned
           */

        int peelInt() const; //extract an integer, (left to right), from a
                //mixed alphanumeric string, e.g. 'T24HC1234b'=> 2
        int peelIntR() const; //same as above, but starts from the right side
        //e.g. 'T2HC1234b'=> 1234
        GStr& trim(char c);
        GStr& trim(const char* c=" \t\n\r"); //trim both ends of characters in given set
        GStr& trimR(const char* c=" \t\n\r"); //trim only right end
        GStr& trimR(char c=' ');
        GStr& chomp(char c='\n') { return trimR(c); }
        GStr& chomp(const char* cstr); //like trimR, but given string is taken as a whole
        GStr& trimL(const char* c=" \t\n\r"); //trim only left end
        GStr& trimL(char c=' ');
        GStr& padR(int len, char c=' '); //align it in len spaces to the right
        GStr& padL(int len, char c=' '); //align it in len spaces to the left
        GStr& padC(int len, char c=' '); //center it
        size_t read(FILE* stream, const char* delimiter="\n", size_t bufsize=4096);
          //read next token from stream, using the given string as
          //a marker where the block should stop

        static const int max_token_size = 200;
        static const int max_line_size = 600;
        const char* chars() const;
        const char* text() const;
    protected:
        char* fTokenDelimiter;
        int fLastTokenStart;
        enTokenizeMode fTokenizeMode;
        void* readbuf; //file read buffer for the read() function
        size_t readbufsize; //last setting for the readbuf
        static void invalid_args_error(const char* fname);
        static void invalid_index_error(const char* fname);
        struct Data {//structure holding actual
                     //string data and reference count information
               Data() { ref_count=0; length=0; chars[0] = '\0'; }
               unsigned int ref_count;
               int length;
               char chars[1];
              };
        static Data* new_data(int length); //alloc a specified length string's Data
        static Data* new_data(const char* str); //alloc a copy of a specified string
        void replace_data(int length);
        void replace_data(Data* data);
        void make_unique();
        char* chrs(); // this is dangerous, length should not be affected
        static Data null_data; //a null (empty) string Data is available here
        Data* my_data; //pointer to a Data object holding actual string data
};

/***************************************************************************/

inline int GStr::length() const {
 return my_data->length;
 }


inline const char *GStr::chars() const {
 return my_data->chars;
 }

inline char *GStr::chrs() { //protected version, allows modification of the chars
 return my_data->chars;
 }

inline const char *GStr::text() const {
 return my_data->chars;
 }


inline bool operator>=(const char *s1, const GStr& s2) {
 return (strcmp(s1, s2.chars()) >= 0);
 }

inline bool operator!=(const char *s1, const GStr& s2) {
 return (strcmp(s1, s2.chars()) != 0);
 }

inline void swap(GStr& s1, GStr& s2) {
 GStr::Data *tmp = s1.my_data; s1.my_data = s2.my_data;
 s2.my_data = tmp;
 }


#endif
Revision:	2
Committed:	Mon Mar 22 22:03:27 2010 UTC (12 years, 4 months ago) by gpertea
File size:	8517 byte(s)
Log Message:	added my gclib source files
Line	File contents
1	//---------------------------------------------------------------------------
2	#ifndef GSTR_H
3	#define GSTR_H
4	//---------------------------------------------------------------------------
5	#include <string.h>
6	#include <stdio.h>
7	#include <stdlib.h>
8	#include "GBase.h"
9
10	// This class uses reference counting and copy-on-write semantics
11
12	// All indexes are zero-based. For all functions that accept an index, a
13	// negative index specifies an index from the right of the string. Also,
14	// for all functions that accept a length, a length of -1 specifies the rest
15	// of the string.
16	enum enTokenizeMode {
17	tkFullString,
18	tkCharSet
19	};
20
21	class GStr {
22	friend GStr operator+(const char* s1, const GStr& s2);
23	friend bool operator==(const char* s1, const GStr& s2);
24	friend bool operator<(const char* s1, const GStr& s2);
25	friend bool operator<=(const char* s1, const GStr& s2);
26	friend bool operator>(const char* s1, const GStr& s2);
27	friend bool operator>=(const char* s1, const GStr& s2);
28	friend bool operator!=(const char* s1, const GStr& s2);
29	friend void swap(GStr& s1, GStr& s2);
30	public:
31	GStr();
32	GStr(const GStr& s);
33	GStr(const char* s);
34	GStr(const int i);
35	GStr(const double f);
36	GStr(char c, int n = 1);
37	~GStr();
38	operator const char* () const { return my_data->chars;} //inline here
39	char& operator[](int index);
40	char operator[](int index) const;
41	GStr& operator=(const GStr& s);
42	GStr& operator=(const char* s);
43	GStr& operator=(const int i);
44	GStr& operator=(const double f);
45	GStr operator+(const GStr& s) const;
46	GStr operator+(const char* s) const;
47	GStr operator+(const char c) const;
48	GStr operator+(const int i) const;
49	GStr operator+(const double f) const;
50	bool operator==(const GStr& s) const;
51	bool operator==(const char* s) const;
52	bool operator<(const GStr& s) const;
53	bool operator<(const char* s) const;
54	bool operator<=(const GStr& s) const;
55	bool operator<=(const char* s) const;
56	bool operator>(const GStr& s) const;
57	bool operator>(const char* s) const;
58	bool operator>=(const GStr& s) const;
59	bool operator>=(const char* s) const;
60	bool operator!=(const GStr& s) const;
61	bool operator!=(const char* s) const;
62	GStr& operator+=(const GStr& s);
63	GStr& operator+=(const char* s);
64	GStr& operator+=(const char c);
65	GStr& operator+=(const int i);
66	GStr& operator+=(const double f);
67	//interface:
68	public:
69	int length() const;
70	bool is_empty() const;
71	bool is_space() const;
72	GStr substr(int index = 0, int len = -1) const;
73	GStr to(char c); //return the first part up to first occurence of c
74	//or whole string if c not found
75	GStr from(char c); //same as to, but starting from the right side
76	GStr copy() const;
77	GStr& format(const char *fmt,...);
78	GStr& appendfmt(const char *fmt,...);
79	GStr& cut(int index = 0, int len = -1); //delete a specified length
80	GStr& remove(int from, int to) {
81	return cut(from, to-from+1);
82	}
83
84	//paste a string at the specified position
85	GStr& paste(const GStr& s, int index = 0, int len=-1);
86	GStr& paste(const char* s, int index = 0, int len = -1);
87	GStr& replace(const char* from, const char* to=NULL);
88	GStr& insert(const GStr& s, int index = 0);
89	GStr& insert(const char* s, int index = 0);
90	GStr& append(const char* s);
91	GStr& append(const GStr& s);
92	GStr& upper();
93	GStr& lower();
94	GStr& clear();//make empty
95	//character translation or removal:
96	GStr& tr(const char* from, const char* to=NULL);
97	//number of occurences of a char in the string:
98	int count(char c);
99	void startTokenize(const char* delimiter, enTokenizeMode tokenizemode=tkCharSet);
100	bool nextToken(GStr& token);
101	int asInt(int base=10);
102	double asReal();
103	double asDouble() { return asReal(); }
104	bool asReal(double& r);
105	bool asDouble(double& r) { return asReal(r); }
106	bool asInt(int& r, int base=10);
107	int index(const GStr& s, int start_index = 0) const;
108	int index(const char* s, int start_index = 0) const;
109	int index(char c, int start_index = 0) const;
110	int rindex(char c) const;
111	int rindex(const char* str) const;
112	bool contains(const GStr& s) const;
113	bool contains(const char* s) const;
114	bool contains(char c) const;
115	bool startsWith(const char* s) const;
116	GStr split(const char* delim);
117	GStr split(char c);
118	/* splits "this" in two parts, at the first (leftmost)
119	encounter of delim:
120	1st would stay in "this"
121	(which this way is truncated)
122	2nd will go to the returned string
123	*/
124	GStr splitr(const char* delim);
125	GStr splitr(char c);
126	/* splits "this" in two parts, at the last (rightmost)
127	encounter of delim:
128	1st would stay in "this"
129	2nd will be returned
130	*/
131
132	int peelInt() const; //extract an integer, (left to right), from a
133	//mixed alphanumeric string, e.g. 'T24HC1234b'=> 2
134	int peelIntR() const; //same as above, but starts from the right side
135	//e.g. 'T2HC1234b'=> 1234
136	GStr& trim(char c);
137	GStr& trim(const char* c=" \t\n\r"); //trim both ends of characters in given set
138	GStr& trimR(const char* c=" \t\n\r"); //trim only right end
139	GStr& trimR(char c=' ');
140	GStr& chomp(char c='\n') { return trimR(c); }
141	GStr& chomp(const char* cstr); //like trimR, but given string is taken as a whole
142	GStr& trimL(const char* c=" \t\n\r"); //trim only left end
143	GStr& trimL(char c=' ');
144	GStr& padR(int len, char c=' '); //align it in len spaces to the right
145	GStr& padL(int len, char c=' '); //align it in len spaces to the left
146	GStr& padC(int len, char c=' '); //center it
147	size_t read(FILE* stream, const char* delimiter="\n", size_t bufsize=4096);
148	//read next token from stream, using the given string as
149	//a marker where the block should stop
150
151	static const int max_token_size = 200;
152	static const int max_line_size = 600;
153	const char* chars() const;
154	const char* text() const;
155	protected:
156	char* fTokenDelimiter;
157	int fLastTokenStart;
158	enTokenizeMode fTokenizeMode;
159	void* readbuf; //file read buffer for the read() function
160	size_t readbufsize; //last setting for the readbuf
161	static void invalid_args_error(const char* fname);
162	static void invalid_index_error(const char* fname);
163	struct Data {//structure holding actual
164	//string data and reference count information
165	Data() { ref_count=0; length=0; chars[0] = '\0'; }
166	unsigned int ref_count;
167	int length;
168	char chars[1];
169	};
170	static Data* new_data(int length); //alloc a specified length string's Data
171	static Data* new_data(const char* str); //alloc a copy of a specified string
172	void replace_data(int length);
173	void replace_data(Data* data);
174	void make_unique();
175	char* chrs(); // this is dangerous, length should not be affected
176	static Data null_data; //a null (empty) string Data is available here
177	Data* my_data; //pointer to a Data object holding actual string data
178	};
179
180	/***************************************************************************/
181
182	inline int GStr::length() const {
183	return my_data->length;
184	}
185
186
187	inline const char *GStr::chars() const {
188	return my_data->chars;
189	}
190
191	inline char *GStr::chrs() { //protected version, allows modification of the chars
192	return my_data->chars;
193	}
194
195	inline const char *GStr::text() const {
196	return my_data->chars;
197	}
198
199
200	inline bool operator>=(const char *s1, const GStr& s2) {
201	return (strcmp(s1, s2.chars()) >= 0);
202	}
203
204	inline bool operator!=(const char *s1, const GStr& s2) {
205	return (strcmp(s1, s2.chars()) != 0);
206	}
207
208	inline void swap(GStr& s1, GStr& s2) {
209	GStr::Data *tmp = s1.my_data; s1.my_data = s2.my_data;
210	s2.my_data = tmp;
211	}
212
213
214	#endif