Annotation of parser3/src/include/pa_string.h, revision 1.47.2.1
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:
1.47.2.1! paf 8: $Id: pa_string.h,v 1.47 2001/03/20 06:45:18 paf Exp $
1.1 paf 9: */
10:
11: #ifndef PA_STRING_H
12: #define PA_STRING_H
13:
1.9 paf 14: #ifdef HAVE_CONFIG_H
1.35 paf 15: # include "pa_config.h"
1.9 paf 16: #endif
17:
1.1 paf 18: #include <stddef.h>
19:
1.15 paf 20: #include "pa_pool.h"
1.4 paf 21: #include "pa_types.h"
22:
1.31 paf 23: #define UNTAINT_TIMES_BIGGER 10
24:
1.9 paf 25: #ifndef NO_STRING_ORIGIN
1.33 paf 26: # define STRING_APPEND_PARAMS \
27: const char *src, size_t size, \
28: bool tainted, \
29: const char *file, uint line
1.47.2.1! paf 30: /// appends clean piece to String @see String::real_append
1.27 paf 31: # define APPEND(src, size, file, line) real_append(src, size, false, file, line)
1.47.2.1! paf 32: /// appends tainted piece to String @see String::real_append
1.27 paf 33: # define APPEND_TAINTED(src, size, file, line) real_append(src, size, true, file, line)
1.9 paf 34: #else
1.33 paf 35: # define STRING_APPEND_PARAMS \
36: const char *src, \
37: size_t size, \
38: bool tainted
1.47.2.1! paf 39: /// appends clean piece to String @see String::real_append
1.27 paf 40: # define APPEND(src, size, file, line) real_append(src, size, false)
1.47.2.1! paf 41: /// appends tainted piece to String @see String::real_append
1.27 paf 42: # define APPEND_TAINTED(src, size, file, line) real_append(src, size, true)
1.9 paf 43: #endif
1.47.2.1! paf 44: /// handy: appends const char* piece to String @see String::real_append
1.23 paf 45: #define APPEND_CONST(src) APPEND(src, 0, 0, 0)
1.9 paf 46:
1.42 paf 47: /**
1.41 paf 48: Pooled string.
49:
1.47 paf 50: Internal structure:
51: @verbatim
52: String Chunk0
53: ====== ========
54: head--------------->[ptr, size, ...]
55: append_here-------->[ptr, size, ...]
56: .
57: .
58: [ptr, size, ...]
59: link_row----------->[link to the next chunk]
1.41 paf 60: @endverbatim
61:
62: All pieces remember
63: - the file and its line they are from [can be turned off by NO_STRING_ORIGIN]
64: - whether they are tainted or not,
65: and the language which should be used to detaint them
66: */
1.15 paf 67: class String : public Pooled {
1.1 paf 68: public:
1.47.2.1! paf 69:
1.1 paf 70: enum {
1.41 paf 71: CR_PREALLOCATED_COUNT=5, ///< default preallocated item count
72: CR_GROW_PERCENT=60 ///< each time the Array chunk_is_full() array expanded()
1.1 paf 73: };
74:
1.41 paf 75: /// piece is tainted or not. the language to use when detaint
1.27 paf 76: enum Untaint_lang {
1.47.2.1! paf 77: UL_UNKNOWN=0, ///< when get by name fails
! 78: UL_NO, ///< clean
! 79: UL_YES, ///< tainted, untaint language as assigned later
1.27 paf 80: // untaint languages. assigned by ^untaint[lang]{...}
1.47.2.1! paf 81: UL_PASS_APPENDED,
1.41 paf 82: /**<
83: leave language built into string being appended.
84: just a flag, that value not stored
85: */
1.47.2.1! paf 86: UL_AS_IS, ///< leave all characters intact
! 87: UL_FILE_NAME, ///< filename
! 88: UL_HEADER, ///< text in response header
! 89: UL_URI, ///< text in uri
! 90: UL_TABLE, ///< ^table:set body
! 91: UL_SQL, ///< ^table:sql body
! 92: UL_JS, ///< JavaScript code
! 93: UL_HTML, ///< HTML code (for editing)
! 94: UL_HTML_TYPO ///< HTML code with TYPOgraphic replacements (for showing)
1.27 paf 95: };
96:
1.8 paf 97: public:
98:
1.37 paf 99: String(Pool& apool, const char *src=0, bool tainted=false);
1.14 paf 100: String(const String& src);
101: size_t size() const { return fsize; }
1.41 paf 102: /// convert to C string
1.14 paf 103: char *cstr() const;
1.46 paf 104: /** append fragment
105: @see APPEND, APPEND_TAINTED, APPEND_CONST
106: */
1.9 paf 107: String& real_append(STRING_APPEND_PARAMS);
1.44 paf 108: /// @return <0 ==0 or >0 depending on comparison result
1.26 paf 109: int cmp (const String& src) const;
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 { return cmp(src)<=0; }
113: bool operator >= (const String& src) const { return cmp(src)>=0; }
114: bool operator == (const String& src) const {
115: if(size()!=src.size()) // can speed up in trivial case
116: return false;
117: return cmp(src)==0;
118: }
119: bool operator != (const String& src) const { return cmp(src)!=0; }
120:
1.34 paf 121: bool operator == (const char* b_ptr) const;
1.42 paf 122: /**
123: appends other String.
1.41 paf 124:
1.47 paf 125: marking all tainted pieces of it with @a lang.
126: or marking ALL pieces of it with a @a lang when @a forced to.
1.41 paf 127: */
1.39 paf 128: String& append(const String& src, Untaint_lang lang, bool forced=false);
1.8 paf 129:
1.41 paf 130: /// simple hash code of string. used by Hash
1.14 paf 131: uint hash_code() const;
1.13 paf 132:
1.41 paf 133: #ifndef NO_STRING_ORIGIN
134: /// origin of string. calculated by first row
1.43 paf 135: const Origin& origin() const;
1.41 paf 136: #endif
1.8 paf 137:
1.10 paf 138: private:
139:
1.1 paf 140: struct Chunk {
1.6 paf 141: // the number of rows in chunk
1.1 paf 142: int count;
143: union Row {
1.27 paf 144: // fragment
145: struct {
146: const char *ptr; // pointer to the start
147: size_t size; // length
148: Untaint_lang lang; // untaint flag, later untaint language
149: #ifndef NO_STRING_ORIGIN
150: Origin origin; // origin
151: #endif
1.1 paf 152: } item;
153: Chunk *link; // link to the next chunk in chain
1.2 paf 154: } rows[CR_PREALLOCATED_COUNT];
1.1 paf 155: // next rows are here
156: Chunk *preallocated_link;
157: }
158: head; // the head chunk of the chunk chain
159:
160: // next append would write to this record
161: Chunk::Row *append_here;
162:
163: // the address of place where lies address
164: // of the link to the next chunk to allocate
165: Chunk::Row *link_row;
166:
1.5 paf 167: private:
1.25 paf 168: // last chunk
169: Chunk *last_chunk;
1.5 paf 170:
171: // string size
172: size_t fsize;
173:
174: // used rows in all chunks
175: int fused_rows;
176:
177: private:
1.1 paf 178:
179: bool chunk_is_full() {
180: return append_here == link_row;
181: }
182: void expand();
1.39 paf 183: void set_lang(Chunk::Row *row, Untaint_lang lang, bool forced, size_t size);
1.7 paf 184:
185: private: //disabled
186:
1.12 paf 187: String& operator = (const String&) { return *this; }
1.7 paf 188:
1.1 paf 189: };
190:
191: #endif
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