Annotation of parser3/src/include/pa_string.h, revision 1.144.2.6
1.41 paf 1: /** @file
1.43 paf 2: Parser: string class decl.
3:
1.144 paf 4: Copyright (c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com)
1.124 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6: */
7:
8: #ifndef PA_STRING_H
9: #define PA_STRING_H
1.140 paf 10:
1.144.2.6! paf 11: static const char* IDENT_STRING_H="$Date: 2003/01/24 11:33:02 $";
1.1 paf 12:
1.15 paf 13: #include "pa_pool.h"
1.4 paf 14: #include "pa_types.h"
1.144.2.2 paf 15: #include "pa_array.h"
1.4 paf 16:
1.144.2.5 paf 17: // forwards
18:
19: class String;
20:
21: typedef object_ptr<String> StringPtr;
22: typedef object_ptr<const String> ConstStringPtr;
23: const ConstStringPtr ConstStringPtrZero(0);
24:
25: class Table;
26: typedef object_ptr<Table> TablePtr;
27: class SQL_Connection;
28: class Dictionary;
29:
30: // helpers
31:
1.9 paf 32: #ifndef NO_STRING_ORIGIN
1.33 paf 33: # define STRING_APPEND_PARAMS \
34: const char *src, size_t size, \
1.119 paf 35: uchar lang, \
1.33 paf 36: const char *file, uint line
1.54 paf 37: /// appends piece to String @see String::real_append
38: # define APPEND(src, size, lang, file, line) \
39: real_append(src, size, lang, file, line)
1.9 paf 40: #else
1.33 paf 41: # define STRING_APPEND_PARAMS \
42: const char *src, \
43: size_t size, \
1.119 paf 44: uchar lang
1.54 paf 45: /// appends piece to String @see String::real_append
46: # define APPEND(src, size, lang, file, line) \
47: real_append(src, size, lang)
48: #endif
1.83 paf 49: /// appends clean piece to String @see String::real_append
1.54 paf 50: #define APPEND_CLEAN(src, size, file, line) \
1.62 paf 51: APPEND(src, size, String::UL_CLEAN, file, line)
1.83 paf 52: /// appends piece to String as-is @see String::real_append
53: #define APPEND_AS_IS(src, size, file, line) \
54: APPEND(src, size, String::UL_AS_IS, file, line)
1.48 paf 55: /// appends tainted piece to String @see String::real_append
1.54 paf 56: #define APPEND_TAINTED(src, size, file, line) \
1.62 paf 57: APPEND(src, size, String::UL_TAINTED, file, line)
1.48 paf 58: /// handy: appends const char* piece to String @see String::real_append
1.83 paf 59: #define APPEND_CONST(src) APPEND_AS_IS(src, 0, 0, 0)
1.9 paf 60:
1.144.2.2 paf 61: struct String_fragment {
1.144.2.5 paf 62: uchar/*Untaint_lang*/ lang; ///< untaint flag, later untaint language
1.144.2.2 paf 63: const char *ptr; ///< pointer to the start
64: size_t size; ///< length
1.41 paf 65:
1.144.2.2 paf 66: #ifndef NO_STRING_ORIGIN
67: /// all String pieces hold information of where they come from
68: struct Origin {
69: const char *file; ///< macros file name | load file name | sql query text
70: uint line; ///< file line no | record no
71: } origin; ///< origin
72: #endif
73: };
74:
75: /**
76: String which knows the language of all it's fragments.
1.41 paf 77:
78: All pieces remember
79: - the file and its line they are from [can be turned off by NO_STRING_ORIGIN]
80: - whether they are tainted or not,
81: and the language which should be used to detaint them
82: */
1.48 paf 83:
1.144.2.2 paf 84: class String: public Array<String_fragment> {
85: size_t fsize;
1.144.2.5 paf 86: int count() const; // hiding fro accidental use instead of size()
1.144.2.2 paf 87: public:
1.1 paf 88:
1.106 parser 89: /** piece is tainted or not. the language to use when detaint
90: remember to change String_Untaint_lang_name @ untaint.C along
91: */
1.27 paf 92: enum Untaint_lang {
1.72 paf 93: UL_UNSPECIFIED=0, ///< zero value handy for hash lookup @see untaint_lang_name2enum
1.122 paf 94: // these two must go before others, there are checks for >UL_AS_IS
1.62 paf 95: UL_CLEAN, ///< clean
1.122 paf 96: UL_AS_IS, ///< leave all characters intact
97:
1.48 paf 98: UL_PASS_APPENDED,
1.41 paf 99: /**<
100: leave language built into string being appended.
101: just a flag, that value not stored
102: */
1.122 paf 103: UL_TAINTED, ///< tainted, untaint language as assigned later
104: // untaint languages. assigned by ^untaint[lang]{...}
1.103 parser 105: UL_FILE_SPEC, ///< file specification
1.74 paf 106: UL_HTTP_HEADER, ///< text in HTTP response header
107: UL_MAIL_HEADER, ///< text in mail header
1.48 paf 108: UL_URI, ///< text in uri
109: UL_TABLE, ///< ^table:set body
110: UL_SQL, ///< ^table:sql body
111: UL_JS, ///< JavaScript code
1.102 parser 112: UL_XML, ///< ^dom:set xml
1.48 paf 113: UL_HTML, ///< HTML code (for editing)
1.119 paf 114: UL_OPTIMIZE_BIT = 0x80 ///< flag, requiring cstr whitespace optimization
1.27 paf 115: };
116:
1.8 paf 117: public:
1.144.2.5 paf 118: static const ConstStringPtr undefined_origin;
1.8 paf 119:
1.144.2.1 paf 120: //static String& OnPool(Pool& apool, const char *local_src=0, size_t src_size=0, bool tainted=false);
1.144.2.6! paf 121: explicit String(const char *src=0, size_t src_size=0, bool tainted=false);
1.14 paf 122: String(const String& src);
1.144.2.2 paf 123: bool is_empty() const { return !size(); }
124: size_t size() const { return fsize; }
1.69 paf 125: /// convert to C string. if 'lang' known, forcing 'lang' to it
1.144.2.5 paf 126: CharPtr cstr(Untaint_lang lang=UL_AS_IS,
1.82 paf 127: SQL_Connection *connection=0,
1.133 paf 128: Charset *cstr_charset=0, const char *cstr_charset_name=0) const {
1.88 parser 129:
1.144.2.5 paf 130: CharPtr result(new char[cstr_bufsize(lang, connection, cstr_charset)]);
131: char *eol=store_to(result.get(), lang, connection, cstr_charset, cstr_charset_name);
1.50 paf 132: *eol=0;
133: return result;
134: }
1.117 paf 135: char *cstr_debug_origins() const;
1.108 parser 136: /// puts pieces to buf
1.144.2.5 paf 137: void serialize(Pool& pool, size_t prolog_size, char *& buf, size_t& buf_size) const;
1.108 parser 138: /// appends pieces from buf to self
1.132 paf 139: bool deserialize(size_t prolog_size, void *buf, size_t buf_size, const char *file);
1.46 paf 140: /** append fragment
1.83 paf 141: @see APPEND_AS_IS, APPEND_CLEAN, APPEND_TAINTED, APPEND_CONST
1.46 paf 142: */
1.9 paf 143: String& real_append(STRING_APPEND_PARAMS);
1.44 paf 144: /// @return <0 ==0 or >0 depending on comparison result
1.62 paf 145: int cmp (int& partial, const String& src,
1.72 paf 146: size_t this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const;
1.56 paf 147: bool operator < (const String& src) const { int p; return cmp(p, src)<0; }
148: bool operator > (const String& src) const { int p; return cmp(p, src)>0; }
149: bool operator <= (const String& src) const { int p; return cmp(p, src)<=0; }
150: bool operator >= (const String& src) const { int p; return cmp(p, src)>=0; }
1.26 paf 151: bool operator == (const String& src) const {
152: if(size()!=src.size()) // can speed up in trivial case
153: return false;
1.56 paf 154: int p; return cmp(p, src)==0;
1.26 paf 155: }
1.56 paf 156: bool operator != (const String& src) const { int p; return cmp(p, src)!=0; }
1.26 paf 157:
1.50 paf 158: /**
159: @param partial
160: returns partial match status.
1.51 paf 161: - -1: strings too different
162: - 0: full match
163: - 1: means @c this starts @c src
164: - 2: means @src starts @this
1.50 paf 165: */
1.61 paf 166: int cmp(int& partial, const char* src_ptr, size_t src_size=0,
1.72 paf 167: size_t this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const;
1.139 paf 168: /// this starts with src
169: bool starts_with(const char* src_ptr, size_t src_size=0) const {
170: int p; cmp(p, src_ptr, src_size);
171: return p==0 || p==2;
172: }
1.50 paf 173: bool operator == (const char* src_ptr) const {
174: size_t src_size=src_ptr?strlen(src_ptr):0;
175: if(size() != src_size)
176: return false;
177: int partial; // unused
1.56 paf 178: return cmp(partial, src_ptr, src_size)==0;
1.50 paf 179: }
1.80 paf 180: bool operator != (const char* src_ptr) const {
181: int partial; // unused
182: return cmp(partial, src_ptr, 0)!=0;
183: }
184:
1.119 paf 185: String& append(const String& src, uchar lang, bool forced=false);
1.76 paf 186: String& operator << (const String& src) { return append(src, UL_PASS_APPENDED); }
187: String& operator << (const char *src) { return APPEND_CONST(src); }
1.8 paf 188:
1.41 paf 189: /// simple hash code of string. used by Hash
1.14 paf 190: uint hash_code() const;
1.100 parser 191:
1.142 paf 192: /// extracts first char of a string, if any
193: char first_char() const {
1.144.2.2 paf 194: return is_empty()?0:*felements[0].ptr;
1.142 paf 195: }
1.54 paf 196:
197: /// extracts [start, finish) piece of string
1.144.2.4 paf 198: StringPtr mid(size_t start, size_t finish) const;
1.55 paf 199:
1.59 paf 200: /// @return position of substr in string, -1 means "not found" [String version]
1.62 paf 201: int pos(const String& substr,
1.112 paf 202: int this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const;
1.59 paf 203: /// @return position of substr in string, -1 means "not found" [const char* version]
1.97 parser 204: int pos(const char *substr, size_t substr_size=0,
1.112 paf 205: int this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const;
1.62 paf 206:
1.144.2.5 paf 207: void split(Array<ConstStringPtr>& result,
1.62 paf 208: size_t *pos_after_ref,
209: const char *delim, size_t delim_size,
1.86 paf 210: Untaint_lang lang=UL_UNSPECIFIED, int limit=-1) const;
1.144.2.5 paf 211: void split(Array<ConstStringPtr>& result,
1.62 paf 212: size_t *pos_after_ref,
213: const String& delim,
1.86 paf 214: Untaint_lang lang=UL_UNSPECIFIED, int limit=-1) const;
1.62 paf 215:
1.144.2.5 paf 216: typedef void (*Row_action)(Table& table, Array<ConstStringPtr> *row,
1.136 paf 217: int prestart, int prefinish,
218: int poststart, int postfinish,
1.68 paf 219: void *info);
1.87 parser 220: /**
1.144.2.5 paf 221: @return table of found items, if any.
1.87 parser 222: table format is defined and fixed[can be used by others]:
223: @verbatim
224: prematch/match/postmatch/1/2/3/...
225: @endverbatim
226: */
1.144.2.5 paf 227: TablePtr match(Charset& source_charset,
228: ConstStringPtr aorigin,
1.64 paf 229: const String& regexp,
1.144.2.5 paf 230: ConstStringPtr options,
1.99 parser 231: Row_action row_action, void *info,
232: bool *was_global=0) const;
1.87 parser 233: enum Change_case_kind {
234: CC_UPPER,
235: CC_LOWER
236: };
1.144.2.5 paf 237: StringPtr change_case(Pool& pool, Charset& source_charset,
1.87 parser 238: Change_case_kind kind) const;
1.144.2.5 paf 239: StringPtr replace(Pool& pool, Dictionary& dict) const;
1.96 parser 240: double as_double() const;
241: int as_int() const;
1.137 paf 242:
1.144.2.5 paf 243: StringPtr join_chains(Pool& pool) const;
1.13 paf 244:
1.41 paf 245: #ifndef NO_STRING_ORIGIN
246: /// origin of string. calculated by first row
1.144.2.2 paf 247: const String_fragment::Origin& origin() const;
1.41 paf 248: #endif
1.8 paf 249:
1.129 paf 250: private:
1.10 paf 251:
1.125 paf 252: Untaint_lang lang_of(size_t offset) const;
1.79 paf 253:
1.144.2.5 paf 254: size_t cstr_bufsize(Untaint_lang lang=UL_UNSPECIFIED,
255: SQL_Connection *connection=0,
256: Charset *buf_charset=0) const;
1.79 paf 257: /// convert to C string, store to 'dest' which must be big enough for proper untaint
1.82 paf 258: char *store_to(char *dest, Untaint_lang lang=UL_UNSPECIFIED,
259: SQL_Connection *connection=0,
1.133 paf 260: Charset *store_to_charset=0,
261: const char *store_to_charset_name=0) const;
1.144.2.2 paf 262: /*
1.144.2.1 paf 263: void join_chain(
1.130 paf 264: const Chunk*& achunk, const Chunk::Row*& arow, uint& acountdown,
1.119 paf 265: uchar& joined_lang, const char *& joined_ptr, size_t& joined_size) const;
1.144.2.2 paf 266: */
1.7 paf 267: private: //disabled
268:
1.12 paf 269: String& operator = (const String&) { return *this; }
1.7 paf 270:
1.1 paf 271: };
1.144.2.5 paf 272:
273: // statics
274:
275: const ConstStringPtr String::undefined_origin=ConstStringPtr(0);
276:
277: // helpers
278:
279: #define STRING_PREPARED_FOREACH_FRAGMENT(code) \
280: for(; fragment<last; fragment++) { \
281: code; \
282: }
283:
284: #define STRING_FOREACH_FRAGMENT(code) \
285: { \
286: element_type *last = felements+fused; \
287: element_type *fragment = felements; \
288: STRING_PREPARED_FOREACH_FRAGMENT(code) \
289: }
1.1 paf 290:
291: #endif
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