Annotation of parser3/src/include/pa_string.h, revision 1.49
1.41 paf 1: /** @file
1.43 paf 2: Parser: string class decl.
3:
1.29 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.43 paf 5:
1.30 paf 6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.29 paf 7:
1.49 ! paf 8: $Id: pa_string.h,v 1.48 2001/03/21 14:06:44 paf Exp $
1.1 paf 9: */
10:
11: #ifndef PA_STRING_H
12: #define PA_STRING_H
13:
1.49 ! paf 14: #include "pa_config_includes.h"
1.9 paf 15:
1.1 paf 16: #include <stddef.h>
17:
1.15 paf 18: #include "pa_pool.h"
1.4 paf 19: #include "pa_types.h"
20:
1.31 paf 21: #define UNTAINT_TIMES_BIGGER 10
22:
1.9 paf 23: #ifndef NO_STRING_ORIGIN
1.33 paf 24: # define STRING_APPEND_PARAMS \
25: const char *src, size_t size, \
26: bool tainted, \
27: const char *file, uint line
1.48 paf 28: /// appends clean piece to String @see String::real_append
1.27 paf 29: # define APPEND(src, size, file, line) real_append(src, size, false, file, line)
1.48 paf 30: /// appends tainted piece to String @see String::real_append
1.27 paf 31: # define APPEND_TAINTED(src, size, file, line) real_append(src, size, true, file, line)
1.9 paf 32: #else
1.33 paf 33: # define STRING_APPEND_PARAMS \
34: const char *src, \
35: size_t size, \
36: bool tainted
1.48 paf 37: /// appends clean piece to String @see String::real_append
1.27 paf 38: # define APPEND(src, size, file, line) real_append(src, size, false)
1.48 paf 39: /// appends tainted piece to String @see String::real_append
1.27 paf 40: # define APPEND_TAINTED(src, size, file, line) real_append(src, size, true)
1.9 paf 41: #endif
1.48 paf 42: /// handy: appends const char* piece to String @see String::real_append
1.23 paf 43: #define APPEND_CONST(src) APPEND(src, 0, 0, 0)
1.9 paf 44:
1.42 paf 45: /**
1.41 paf 46: Pooled string.
47:
1.47 paf 48: Internal structure:
49: @verbatim
50: String Chunk0
51: ====== ========
52: head--------------->[ptr, size, ...]
53: append_here-------->[ptr, size, ...]
54: .
55: .
56: [ptr, size, ...]
57: link_row----------->[link to the next chunk]
1.41 paf 58: @endverbatim
59:
60: All pieces remember
61: - the file and its line they are from [can be turned off by NO_STRING_ORIGIN]
62: - whether they are tainted or not,
63: and the language which should be used to detaint them
64: */
1.15 paf 65: class String : public Pooled {
1.1 paf 66: public:
1.48 paf 67:
1.1 paf 68: enum {
1.41 paf 69: CR_PREALLOCATED_COUNT=5, ///< default preallocated item count
70: CR_GROW_PERCENT=60 ///< each time the Array chunk_is_full() array expanded()
1.1 paf 71: };
72:
1.41 paf 73: /// piece is tainted or not. the language to use when detaint
1.27 paf 74: enum Untaint_lang {
1.48 paf 75: UL_UNKNOWN=0, ///< when get by name fails
76: UL_NO, ///< clean
77: UL_YES, ///< tainted, untaint language as assigned later
1.27 paf 78: // untaint languages. assigned by ^untaint[lang]{...}
1.48 paf 79: UL_PASS_APPENDED,
1.41 paf 80: /**<
81: leave language built into string being appended.
82: just a flag, that value not stored
83: */
1.48 paf 84: UL_AS_IS, ///< leave all characters intact
85: UL_FILE_NAME, ///< filename
86: UL_HEADER, ///< text in response header
87: UL_URI, ///< text in uri
88: UL_TABLE, ///< ^table:set body
89: UL_SQL, ///< ^table:sql body
90: UL_JS, ///< JavaScript code
91: UL_HTML, ///< HTML code (for editing)
92: UL_HTML_TYPO ///< HTML code with TYPOgraphic replacements (for showing)
1.27 paf 93: };
94:
1.8 paf 95: public:
96:
1.37 paf 97: String(Pool& apool, const char *src=0, bool tainted=false);
1.14 paf 98: String(const String& src);
99: size_t size() const { return fsize; }
1.41 paf 100: /// convert to C string
1.14 paf 101: char *cstr() const;
1.46 paf 102: /** append fragment
103: @see APPEND, APPEND_TAINTED, APPEND_CONST
104: */
1.9 paf 105: String& real_append(STRING_APPEND_PARAMS);
1.44 paf 106: /// @return <0 ==0 or >0 depending on comparison result
1.26 paf 107: int cmp (const String& src) const;
108: bool operator < (const String& src) const { return cmp(src)<0; }
109: bool operator > (const String& src) const { return cmp(src)>0; }
110: bool operator <= (const String& src) const { return cmp(src)<=0; }
111: bool operator >= (const String& src) const { return cmp(src)>=0; }
112: bool operator == (const String& src) const {
113: if(size()!=src.size()) // can speed up in trivial case
114: return false;
115: return cmp(src)==0;
116: }
117: bool operator != (const String& src) const { return cmp(src)!=0; }
118:
1.34 paf 119: bool operator == (const char* b_ptr) const;
1.42 paf 120: /**
121: appends other String.
1.41 paf 122:
1.47 paf 123: marking all tainted pieces of it with @a lang.
124: or marking ALL pieces of it with a @a lang when @a forced to.
1.41 paf 125: */
1.39 paf 126: String& append(const String& src, Untaint_lang lang, bool forced=false);
1.8 paf 127:
1.41 paf 128: /// simple hash code of string. used by Hash
1.14 paf 129: uint hash_code() const;
1.13 paf 130:
1.41 paf 131: #ifndef NO_STRING_ORIGIN
132: /// origin of string. calculated by first row
1.43 paf 133: const Origin& origin() const;
1.41 paf 134: #endif
1.8 paf 135:
1.10 paf 136: private:
137:
1.1 paf 138: struct Chunk {
1.6 paf 139: // the number of rows in chunk
1.1 paf 140: int count;
141: union Row {
1.27 paf 142: // fragment
143: struct {
144: const char *ptr; // pointer to the start
145: size_t size; // length
146: Untaint_lang lang; // untaint flag, later untaint language
147: #ifndef NO_STRING_ORIGIN
148: Origin origin; // origin
149: #endif
1.1 paf 150: } item;
151: Chunk *link; // link to the next chunk in chain
1.2 paf 152: } rows[CR_PREALLOCATED_COUNT];
1.1 paf 153: // next rows are here
154: Chunk *preallocated_link;
155: }
156: head; // the head chunk of the chunk chain
157:
158: // next append would write to this record
159: Chunk::Row *append_here;
160:
161: // the address of place where lies address
162: // of the link to the next chunk to allocate
163: Chunk::Row *link_row;
164:
1.5 paf 165: private:
1.25 paf 166: // last chunk
167: Chunk *last_chunk;
1.5 paf 168:
169: // string size
170: size_t fsize;
171:
172: // used rows in all chunks
173: int fused_rows;
174:
175: private:
1.1 paf 176:
177: bool chunk_is_full() {
178: return append_here == link_row;
179: }
180: void expand();
1.39 paf 181: void set_lang(Chunk::Row *row, Untaint_lang lang, bool forced, size_t size);
1.7 paf 182:
183: private: //disabled
184:
1.12 paf 185: String& operator = (const String&) { return *this; }
1.7 paf 186:
1.1 paf 187: };
188:
189: #endif
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