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root/gclib/gclib/GStr.h
Revision: 16
Committed: Mon Jul 18 20:56:02 2011 UTC (8 years, 4 months ago) by gpertea
File size: 8597 byte(s)
Log Message:
sync with local source

Line File contents
1 //---------------------------------------------------------------------------
2 #ifndef GSTR_H
3 #define GSTR_H
4 //---------------------------------------------------------------------------
5 #include "GBase.h"
6 #include <string.h>
7 #include <stdio.h>
8 #include <stdlib.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, int end_index = -1) const;
111 int rindex(const char* str, int end_index = -1) 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 bool startsWith(const GStr& s) const;
117 bool endsWith(const char* s) const;
118 bool endsWith(const GStr& s) const;
119 GStr split(const char* delim);
120 GStr split(char c);
121 /* splits "this" in two parts, at the first (leftmost)
122 encounter of delim:
123 1st would stay in "this"
124 (which this way is truncated)
125 2nd will go to the returned string
126 */
127 GStr splitr(const char* delim);
128 GStr splitr(char c);
129 /* splits "this" in two parts, at the last (rightmost)
130 encounter of delim:
131 1st would stay in "this"
132 2nd will be returned
133 */
134
135 int peelInt() const; //extract an integer, (left to right), from a
136 //mixed alphanumeric string, e.g. 'T24HC1234b'=> 2
137 int peelIntR() const; //same as above, but starts from the right side
138 //e.g. 'T2HC1234b'=> 1234
139 GStr& trim(char c);
140 GStr& trim(const char* c=" \t\n\r"); //trim both ends of characters in given set
141 GStr& trimR(const char* c=" \t\n\r"); //trim only right end
142 GStr& trimR(char c=' ');
143 GStr& chomp(char c='\n') { return trimR(c); }
144 GStr& chomp(const char* cstr); //like trimR, but given string is taken as a whole
145 GStr& trimL(const char* c=" \t\n\r"); //trim only left end
146 GStr& trimL(char c=' ');
147 GStr& padR(int len, char c=' '); //align it in len spaces to the right
148 GStr& padL(int len, char c=' '); //align it in len spaces to the left
149 GStr& padC(int len, char c=' '); //center it
150 size_t read(FILE* stream, const char* delimiter="\n", size_t bufsize=4096);
151 //read next token from stream, using the given string as
152 //a marker where the block should stop
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