Annotation of parser3/src/include/pa_string.h, revision 1.29
1.1 paf 1: /*
1.29 ! paf 2: Parser
! 3: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
! 4: Author: Alexander Petrosyan <paf@design.ru>
! 5:
! 6: $Id: pa_string.C,v 1.35 2001/03/10 12:12:51 paf Exp $
1.1 paf 7: */
8:
9: /*
10:
11: String Chunk0
12: ====== ========
1.16 paf 13: head--------------->[ptr, size, ...]
14: append_here-------->[ptr, size, ...]
15: .
16: .
17: [ptr, size, ...]
18: link_row----------->[link to the next chunk]
1.1 paf 19:
20: */
21:
22: #ifndef PA_STRING_H
23: #define PA_STRING_H
24:
1.9 paf 25: #ifdef HAVE_CONFIG_H
26: #include "pa_config.h"
27: #endif
28:
1.1 paf 29: #include <stddef.h>
30:
1.15 paf 31: #include "pa_pool.h"
1.4 paf 32: #include "pa_types.h"
33:
1.9 paf 34: #ifndef NO_STRING_ORIGIN
1.27 paf 35: # define STRING_APPEND_PARAMS const char *src, size_t size, bool tainted, char *file, uint line
36: # define APPEND(src, size, file, line) real_append(src, size, false, file, line)
37: # define APPEND_TAINTED(src, size, file, line) real_append(src, size, true, file, line)
1.9 paf 38: #else
1.27 paf 39: # define STRING_APPEND_PARAMS const char *src, size_t size, bool tainted
40: # define APPEND(src, size, file, line) real_append(src, size, false)
41: # define APPEND_TAINTED(src, size, file, line) real_append(src, size, true)
1.9 paf 42: #endif
1.23 paf 43: #define APPEND_CONST(src) APPEND(src, 0, 0, 0)
1.9 paf 44:
1.15 paf 45: class String : public Pooled {
1.1 paf 46: public:
47: enum {
48: CR_PREALLOCATED_COUNT=5,
49: CR_GROW_PERCENT=60
50: };
51:
1.27 paf 52: enum Untaint_lang {
53: NO, // clean
54: YES, // tainted, untaint language as assigned later
55: // untaint languages. assigned by ^untaint[lang]{...}
1.28 paf 56: PASS_APPENDED,
57: // leave language built into string being appended
58: // just a flag, that value not stored
1.27 paf 59: AS_IS,
60: SQL,
61: JS,
62: TABLE,
63: HTML,
64: HTML_TYPO
65: };
66:
1.8 paf 67: public:
68:
1.11 paf 69: String(Pool& apool);
1.14 paf 70: String(const String& src);
71: size_t size() const { return fsize; }
72: int used_rows() const { return fused_rows; }
73: char *cstr() const;
1.9 paf 74: String& real_append(STRING_APPEND_PARAMS);
1.26 paf 75: int cmp (const String& src) const;
76: bool operator < (const String& src) const { return cmp(src)<0; }
77: bool operator > (const String& src) const { return cmp(src)>0; }
78: bool operator <= (const String& src) const { return cmp(src)<=0; }
79: bool operator >= (const String& src) const { return cmp(src)>=0; }
80: bool operator == (const String& src) const {
81: if(size()!=src.size()) // can speed up in trivial case
82: return false;
83: return cmp(src)==0;
84: }
85: bool operator != (const String& src) const { return cmp(src)!=0; }
86:
1.24 paf 87: bool operator == (char* src) const;
1.27 paf 88: String& append(const String& src, Untaint_lang lang);
1.8 paf 89:
1.14 paf 90: uint hash_code() const;
1.13 paf 91:
92: const Origin& origin() const { return head.rows[0].item.origin; }
1.8 paf 93:
1.10 paf 94: private:
95:
1.1 paf 96: struct Chunk {
1.6 paf 97: // the number of rows in chunk
1.1 paf 98: int count;
99: union Row {
1.27 paf 100: // fragment
101: struct {
102: const char *ptr; // pointer to the start
103: size_t size; // length
104: Untaint_lang lang; // untaint flag, later untaint language
105: #ifndef NO_STRING_ORIGIN
106: Origin origin; // origin
107: #endif
1.1 paf 108: } item;
109: Chunk *link; // link to the next chunk in chain
1.2 paf 110: } rows[CR_PREALLOCATED_COUNT];
1.1 paf 111: // next rows are here
112: Chunk *preallocated_link;
113: }
114: head; // the head chunk of the chunk chain
115:
116: // next append would write to this record
117: Chunk::Row *append_here;
118:
119: // the address of place where lies address
120: // of the link to the next chunk to allocate
121: Chunk::Row *link_row;
122:
1.5 paf 123: private:
1.25 paf 124: // last chunk
125: Chunk *last_chunk;
1.5 paf 126:
127: // string size
128: size_t fsize;
129:
130: // used rows in all chunks
131: int fused_rows;
132:
133: private:
1.1 paf 134:
135: bool chunk_is_full() {
136: return append_here == link_row;
137: }
138: void expand();
1.27 paf 139: void set_lang(Chunk::Row *row, Untaint_lang lang, size_t size);
1.7 paf 140:
141: private: //disabled
142:
1.12 paf 143: String& operator = (const String&) { return *this; }
1.7 paf 144:
1.1 paf 145: };
146:
147: #endif
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