Annotation of parser3/src/include/pa_string.h, revision 1.47
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 ! paf 8: $Id: pa_string.h,v 1.46 2001/03/19 23:12:48 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
1.46 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)
1.46 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
1.46 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)
1.46 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
1.46 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:
69: enum {
1.41 paf 70: CR_PREALLOCATED_COUNT=5, ///< default preallocated item count
71: CR_GROW_PERCENT=60 ///< each time the Array chunk_is_full() array expanded()
1.1 paf 72: };
73:
1.41 paf 74: /// piece is tainted or not. the language to use when detaint
1.27 paf 75: enum Untaint_lang {
1.41 paf 76: UNKNOWN=0, ///< when get by name fails
77: NO, ///< clean
78: YES, ///< tainted, untaint language as assigned later
1.27 paf 79: // untaint languages. assigned by ^untaint[lang]{...}
1.40 paf 80: PASS_APPENDED,
1.41 paf 81: /**<
82: leave language built into string being appended.
83: just a flag, that value not stored
84: */
1.47 ! paf 85: AS_IS, ///< leave all characters intact
! 86: FILE_NAME, ///< filename
! 87: HEADER, ///< text in response header
! 88: URI, ///< text in uri
! 89: TABLE, ///< ^table:set body
! 90: SQL, ///< ^table:sql body
! 91: JS, ///< JavaScript code
! 92: HTML, ///< HTML code (for editing)
! 93: HTML_TYPO ///< HTML code with TYPOgraphic replacements (for showing)
1.27 paf 94: };
95:
1.8 paf 96: public:
97:
1.37 paf 98: String(Pool& apool, const char *src=0, bool tainted=false);
1.14 paf 99: String(const String& src);
100: size_t size() const { return fsize; }
1.41 paf 101: /// convert to C string
1.14 paf 102: char *cstr() const;
1.46 paf 103: /** append fragment
104: @see APPEND, APPEND_TAINTED, APPEND_CONST
105: */
1.9 paf 106: String& real_append(STRING_APPEND_PARAMS);
1.44 paf 107: /// @return <0 ==0 or >0 depending on comparison result
1.26 paf 108: int cmp (const String& src) const;
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 { return cmp(src)>=0; }
113: bool operator == (const String& src) const {
114: if(size()!=src.size()) // can speed up in trivial case
115: return false;
116: return cmp(src)==0;
117: }
118: bool operator != (const String& src) const { return cmp(src)!=0; }
119:
1.34 paf 120: bool operator == (const char* b_ptr) const;
1.42 paf 121: /**
122: appends other String.
1.41 paf 123:
1.47 ! paf 124: marking all tainted pieces of it with @a lang.
! 125: or marking ALL pieces of it with a @a lang when @a forced to.
1.41 paf 126: */
1.39 paf 127: String& append(const String& src, Untaint_lang lang, bool forced=false);
1.8 paf 128:
1.41 paf 129: /// simple hash code of string. used by Hash
1.14 paf 130: uint hash_code() const;
1.13 paf 131:
1.41 paf 132: #ifndef NO_STRING_ORIGIN
133: /// origin of string. calculated by first row
1.43 paf 134: const Origin& origin() const;
1.41 paf 135: #endif
1.8 paf 136:
1.10 paf 137: private:
138:
1.1 paf 139: struct Chunk {
1.6 paf 140: // the number of rows in chunk
1.1 paf 141: int count;
142: union Row {
1.27 paf 143: // fragment
144: struct {
145: const char *ptr; // pointer to the start
146: size_t size; // length
147: Untaint_lang lang; // untaint flag, later untaint language
148: #ifndef NO_STRING_ORIGIN
149: Origin origin; // origin
150: #endif
1.1 paf 151: } item;
152: Chunk *link; // link to the next chunk in chain
1.2 paf 153: } rows[CR_PREALLOCATED_COUNT];
1.1 paf 154: // next rows are here
155: Chunk *preallocated_link;
156: }
157: head; // the head chunk of the chunk chain
158:
159: // next append would write to this record
160: Chunk::Row *append_here;
161:
162: // the address of place where lies address
163: // of the link to the next chunk to allocate
164: Chunk::Row *link_row;
165:
1.5 paf 166: private:
1.25 paf 167: // last chunk
168: Chunk *last_chunk;
1.5 paf 169:
170: // string size
171: size_t fsize;
172:
173: // used rows in all chunks
174: int fused_rows;
175:
176: private:
1.1 paf 177:
178: bool chunk_is_full() {
179: return append_here == link_row;
180: }
181: void expand();
1.39 paf 182: void set_lang(Chunk::Row *row, Untaint_lang lang, bool forced, size_t size);
1.7 paf 183:
184: private: //disabled
185:
1.12 paf 186: String& operator = (const String&) { return *this; }
1.7 paf 187:
1.1 paf 188: };
189:
190: #endif
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to pa_string.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / include