Annotation of parser3/src/include/pa_string.h, revision 1.118
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)
1.115 paf 5: Author: Alexander Petrosyan <paf@design.ru> (http://paf.design.ru)
1.29 paf 6:
1.118 ! paf 7: $Id: pa_string.h,v 1.117 2001/11/16 13:51:14 paf Exp $
1.1 paf 8: */
9:
10: #ifndef PA_STRING_H
11: #define PA_STRING_H
12:
1.49 paf 13: #include "pa_config_includes.h"
1.15 paf 14: #include "pa_pool.h"
1.4 paf 15: #include "pa_types.h"
16:
1.63 paf 17: class Table;
18:
1.9 paf 19: #ifndef NO_STRING_ORIGIN
1.33 paf 20: # define STRING_APPEND_PARAMS \
21: const char *src, size_t size, \
1.52 paf 22: String::Untaint_lang lang, \
1.33 paf 23: const char *file, uint line
1.54 paf 24: /// appends piece to String @see String::real_append
25: # define APPEND(src, size, lang, file, line) \
26: real_append(src, size, lang, file, line)
1.9 paf 27: #else
1.33 paf 28: # define STRING_APPEND_PARAMS \
29: const char *src, \
30: size_t size, \
1.52 paf 31: String::Untaint_lang lang
1.54 paf 32: /// appends piece to String @see String::real_append
33: # define APPEND(src, size, lang, file, line) \
34: real_append(src, size, lang)
35: #endif
1.83 paf 36: /// appends clean piece to String @see String::real_append
1.54 paf 37: #define APPEND_CLEAN(src, size, file, line) \
1.62 paf 38: APPEND(src, size, String::UL_CLEAN, file, line)
1.83 paf 39: /// appends piece to String as-is @see String::real_append
40: #define APPEND_AS_IS(src, size, file, line) \
41: APPEND(src, size, String::UL_AS_IS, file, line)
1.48 paf 42: /// appends tainted piece to String @see String::real_append
1.54 paf 43: #define APPEND_TAINTED(src, size, file, line) \
1.62 paf 44: APPEND(src, size, String::UL_TAINTED, file, line)
1.48 paf 45: /// handy: appends const char* piece to String @see String::real_append
1.83 paf 46: #define APPEND_CONST(src) APPEND_AS_IS(src, 0, 0, 0)
1.9 paf 47:
1.62 paf 48: class Array;
1.71 paf 49: class SQL_Connection;
1.101 parser 50: class Dictionary;
1.62 paf 51:
1.42 paf 52: /**
1.41 paf 53: Pooled string.
54:
1.47 paf 55: Internal structure:
56: @verbatim
57: String Chunk0
58: ====== ========
59: head--------------->[ptr, size, ...]
60: append_here-------->[ptr, size, ...]
61: .
62: .
63: [ptr, size, ...]
64: link_row----------->[link to the next chunk]
1.41 paf 65: @endverbatim
66:
67: All pieces remember
68: - the file and its line they are from [can be turned off by NO_STRING_ORIGIN]
69: - whether they are tainted or not,
70: and the language which should be used to detaint them
71: */
1.114 paf 72: #include "pa_pragma_pack_begin.h"
1.15 paf 73: class String : public Pooled {
1.1 paf 74: public:
1.48 paf 75:
1.1 paf 76: enum {
1.89 parser 77: CR_PREALLOCATED_COUNT=2, ///< default preallocated item count
1.91 parser 78: CR_GROW_COUNT=2 ///< each time the String chunk_is_full() string expanded()
1.1 paf 79: };
80:
1.106 parser 81: /** piece is tainted or not. the language to use when detaint
82: remember to change String_Untaint_lang_name @ untaint.C along
83: */
1.27 paf 84: enum Untaint_lang {
1.72 paf 85: UL_UNSPECIFIED=0, ///< zero value handy for hash lookup @see untaint_lang_name2enum
1.62 paf 86: UL_CLEAN, ///< clean
87: UL_TAINTED, ///< tainted, untaint language as assigned later
1.27 paf 88: // untaint languages. assigned by ^untaint[lang]{...}
1.48 paf 89: UL_PASS_APPENDED,
1.41 paf 90: /**<
91: leave language built into string being appended.
92: just a flag, that value not stored
93: */
1.48 paf 94: UL_AS_IS, ///< leave all characters intact
1.103 parser 95: UL_FILE_SPEC, ///< file specification
1.74 paf 96: UL_HTTP_HEADER, ///< text in HTTP response header
97: UL_MAIL_HEADER, ///< text in mail header
1.48 paf 98: UL_URI, ///< text in uri
99: UL_TABLE, ///< ^table:set body
100: UL_SQL, ///< ^table:sql body
101: UL_JS, ///< JavaScript code
1.102 parser 102: UL_XML, ///< ^dom:set xml
1.48 paf 103: UL_HTML, ///< HTML code (for editing)
1.116 paf 104: UL_OPTIMIZED_HTML ///< optimized HTML code, adjucent whitespaces joined
1.27 paf 105: };
106:
1.8 paf 107: public:
108:
1.77 paf 109: String(Pool& apool, const char *src=0, size_t src_size=0, bool tainted=false);
1.14 paf 110: String(const String& src);
1.117 paf 111: size_t size() const;
1.69 paf 112: /// convert to C string. if 'lang' known, forcing 'lang' to it
1.109 paf 113: char *cstr(Untaint_lang lang=UL_AS_IS,
1.82 paf 114: SQL_Connection *connection=0,
115: const char *charset=0) const {
1.88 parser 116:
1.116 paf 117: char *result=(char *)malloc(cstr_bufsize(lang, connection, charset));
1.82 paf 118: char *eol=store_to(result, lang, connection, charset);
1.50 paf 119: *eol=0;
120: return result;
121: }
1.117 paf 122: char *cstr_debug_origins() const;
1.108 parser 123: /// puts pieces to buf
124: void serialize(size_t prolog_size, void *& buf, size_t& buf_size) const;
125: /// appends pieces from buf to self
126: void deserialize(size_t prolog_size, void *buf, size_t buf_size, const char *file);
1.46 paf 127: /** append fragment
1.83 paf 128: @see APPEND_AS_IS, APPEND_CLEAN, APPEND_TAINTED, APPEND_CONST
1.46 paf 129: */
1.9 paf 130: String& real_append(STRING_APPEND_PARAMS);
1.44 paf 131: /// @return <0 ==0 or >0 depending on comparison result
1.62 paf 132: int cmp (int& partial, const String& src,
1.72 paf 133: size_t this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const;
1.56 paf 134: bool operator < (const String& src) const { int p; return cmp(p, src)<0; }
135: bool operator > (const String& src) const { int p; return cmp(p, src)>0; }
136: bool operator <= (const String& src) const { int p; return cmp(p, src)<=0; }
137: bool operator >= (const String& src) const { int p; return cmp(p, src)>=0; }
1.26 paf 138: bool operator == (const String& src) const {
139: if(size()!=src.size()) // can speed up in trivial case
140: return false;
1.56 paf 141: int p; return cmp(p, src)==0;
1.26 paf 142: }
1.56 paf 143: bool operator != (const String& src) const { int p; return cmp(p, src)!=0; }
1.26 paf 144:
1.50 paf 145: /**
146: @param partial
147: returns partial match status.
1.51 paf 148: - -1: strings too different
149: - 0: full match
150: - 1: means @c this starts @c src
151: - 2: means @src starts @this
1.50 paf 152: */
1.61 paf 153: int cmp(int& partial, const char* src_ptr, size_t src_size=0,
1.72 paf 154: size_t this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const;
1.50 paf 155: bool operator == (const char* src_ptr) const {
156: size_t src_size=src_ptr?strlen(src_ptr):0;
157: if(size() != src_size)
158: return false;
159: int partial; // unused
1.56 paf 160: return cmp(partial, src_ptr, src_size)==0;
1.50 paf 161: }
1.80 paf 162: bool operator != (const char* src_ptr) const {
163: int partial; // unused
164: return cmp(partial, src_ptr, 0)!=0;
165: }
166:
1.42 paf 167: /**
168: appends other String.
1.41 paf 169:
1.47 paf 170: marking all tainted pieces of it with @a lang.
171: or marking ALL pieces of it with a @a lang when @a forced to.
1.41 paf 172: */
1.39 paf 173: String& append(const String& src, Untaint_lang lang, bool forced=false);
1.76 paf 174: String& operator << (const String& src) { return append(src, UL_PASS_APPENDED); }
175: String& operator << (const char *src) { return APPEND_CONST(src); }
1.8 paf 176:
1.41 paf 177: /// simple hash code of string. used by Hash
1.14 paf 178: uint hash_code() const;
1.100 parser 179:
180: /// extracts first char of a string
181: char first_char() const;
1.54 paf 182:
183: /// extracts [start, finish) piece of string
1.70 paf 184: String& mid(size_t start, size_t finish) const;
1.55 paf 185:
1.59 paf 186: /// @return position of substr in string, -1 means "not found" [String version]
1.62 paf 187: int pos(const String& substr,
1.112 paf 188: int this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const;
1.59 paf 189: /// @return position of substr in string, -1 means "not found" [const char* version]
1.97 parser 190: int pos(const char *substr, size_t substr_size=0,
1.112 paf 191: int this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const;
1.62 paf 192:
193: void split(Array& result,
194: size_t *pos_after_ref,
195: const char *delim, size_t delim_size,
1.86 paf 196: Untaint_lang lang=UL_UNSPECIFIED, int limit=-1) const;
1.62 paf 197: void split(Array& result,
198: size_t *pos_after_ref,
199: const String& delim,
1.86 paf 200: Untaint_lang lang=UL_UNSPECIFIED, int limit=-1) const;
1.62 paf 201:
1.68 paf 202: typedef void (*Row_action)(Table& table, Array *row, int start, int finish,
203: void *info);
1.87 parser 204: /**
205: @return true if fills table.
206: table format is defined and fixed[can be used by others]:
207: @verbatim
208: prematch/match/postmatch/1/2/3/...
209: @endverbatim
210: */
1.81 paf 211: bool match(const unsigned char *pcre_tables,
212: const String *aorigin,
1.64 paf 213: const String& regexp,
1.65 paf 214: const String *options,
1.66 paf 215: Table **table,
1.99 parser 216: Row_action row_action, void *info,
217: bool *was_global=0) const;
1.87 parser 218: enum Change_case_kind {
219: CC_UPPER,
220: CC_LOWER
221: };
222: String& change_case(Pool& pool, const unsigned char *pcre_tables,
223: Change_case_kind kind) const;
1.101 parser 224: String& replace(Pool& pool, Dictionary& dict) const;
1.96 parser 225: double as_double() const;
226: int as_int() const;
1.13 paf 227:
1.41 paf 228: #ifndef NO_STRING_ORIGIN
229: /// origin of string. calculated by first row
1.43 paf 230: const Origin& origin() const;
1.41 paf 231: #endif
1.8 paf 232:
1.10 paf 233: private:
234:
1.84 paf 235: /// several String fragments
1.1 paf 236: struct Chunk {
1.118 ! paf 237: ushort count; ///< the number of rows in chunk
1.84 paf 238: /// string fragment or a link to next chunk union
1.1 paf 239: union Row {
1.84 paf 240: /// fragment
1.27 paf 241: struct {
1.84 paf 242: const char *ptr; ///< pointer to the start
1.118 ! paf 243: ushort size; ///< length
1.113 paf 244: unsigned char/*Untaint_lang*/ lang; ///< untaint flag, later untaint language
1.27 paf 245: #ifndef NO_STRING_ORIGIN
1.84 paf 246: Origin origin; ///< origin
1.27 paf 247: #endif
1.1 paf 248: } item;
1.84 paf 249: Chunk *link; ///< link to the next chunk in chain
1.2 paf 250: } rows[CR_PREALLOCATED_COUNT];
1.84 paf 251: Chunk *preallocated_link; ///< next rows are here
1.1 paf 252: }
1.84 paf 253: head; ///< the head chunk of the chunk chain
1.1 paf 254:
1.84 paf 255: /// next append would write to this record
1.1 paf 256: Chunk::Row *append_here;
257:
1.84 paf 258: /** the address of place where lies address
259: of the link to the next chunk to allocate
260: */
1.1 paf 261: Chunk::Row *link_row;
262:
1.5 paf 263: private:
1.110 paf 264: /// last chunk
1.25 paf 265: Chunk *last_chunk;
1.5 paf 266:
267: private:
1.1 paf 268:
269: bool chunk_is_full() {
270: return append_here == link_row;
271: }
1.111 paf 272: uint used_rows() const;
1.1 paf 273: void expand();
1.79 paf 274:
1.116 paf 275: size_t cstr_bufsize(Untaint_lang lang,
276: SQL_Connection *connection,
277: const char *charset) const;
1.79 paf 278: /// convert to C string, store to 'dest' which must be big enough for proper untaint
1.82 paf 279: char *store_to(char *dest, Untaint_lang lang=UL_UNSPECIFIED,
280: SQL_Connection *connection=0,
281: const char *charset=0) const;
1.107 parser 282:
283: String& reconstruct(Pool& pool) const;
284: void join_chain(Pool& pool,
1.112 paf 285: uint& ai, const Chunk*& achunk, const Chunk::Row*& arow,
1.107 parser 286: Untaint_lang& joined_lang, const char *& joined_ptr, size_t& joined_size) const;
287: String& replace_in_reconstructed(Pool& pool, Dictionary& dict) const;
1.7 paf 288:
289: private: //disabled
290:
1.12 paf 291: String& operator = (const String&) { return *this; }
1.7 paf 292:
1.1 paf 293: };
1.114 paf 294: #include "pa_pragma_pack_end.h"
1.1 paf 295:
296: #endif
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