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| version 1.65, 2001/04/03 14:39:02 | version 1.144.2.19, 2003/02/03 14:40:07 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: string class decl. | Parser: string class decl. |
| Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | |
| Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf) | |
| $Id$ | |
| */ | */ |
| #ifndef PA_STRING_H | #ifndef PA_STRING_H |
| #define PA_STRING_H | #define PA_STRING_H |
| #include "pa_config_includes.h" | static const char* IDENT_STRING_H="$Date$"; |
| #include <stddef.h> | // includes |
| #include "pa_pool.h" | #include "pa_pool.h" |
| #include "pa_types.h" | #include "pa_types.h" |
| #include "pa_array.h" | |
| // forwards | |
| class Table; | class Table; |
| typedef object_ptr<Table> TablePtr; | |
| class SQL_Connection; | |
| class Dictionary; | |
| class Request_charsets; | |
| /** | // helpers |
| $MAIN:html-typo table elements must enlarge string not more that that | |
| that's a tradeoff - otherwise we'd have to scan string twice: | |
| - first for buffer length | |
| - second for replacements themselves | |
| */ | |
| #define UNTAINT_TIMES_BIGGER 10 | |
| #ifndef NO_STRING_ORIGIN | #ifndef NO_STRING_ORIGIN |
| # define STRING_APPEND_PARAMS \ | # define STRING_APPEND_PARAMS \ |
| const char *src, size_t size, \ | const char* src, size_t size, \ |
| String::Untaint_lang lang, \ | String_UL lang, \ |
| const char *file, uint line | const char* file, uint line |
| /// appends piece to String @see String::real_append | /// appends piece to String @see String::real_append |
| # define APPEND(src, size, lang, file, line) \ | # define APPEND(src, size, lang, file, line) \ |
| real_append(src, size, lang, file, line) | real_append(src, size, lang, file, line) |
| #else | #else |
| # define STRING_APPEND_PARAMS \ | # define STRING_APPEND_PARAMS \ |
| const char *src, \ | const char* src, \ |
| size_t size, \ | size_t size, \ |
| String::Untaint_lang lang | String_UL lang |
| /// appends piece to String @see String::real_append | /// appends piece to String @see String::real_append |
| # define APPEND(src, size, lang, file, line) \ | # define APPEND(src, size, lang, file, line) \ |
| real_append(src, size, lang) | real_append(src, size, lang) |
| #endif | #endif |
| /// appends clean piece to String @see String::real_append | /// appends clean piece to String @see String::real_append |
| #define APPEND_CLEAN(src, size, file, line) \ | #define APPEND_CLEAN(src, size, file, line) \ |
| APPEND(src, size, String::UL_CLEAN, file, line) | APPEND(src, size, String::UL_CLEAN, file, line) |
| /// appends piece to String as-is @see String::real_append | |
| #define APPEND_AS_IS(src, size, file, line) \ | |
| APPEND(src, size, String::UL_AS_IS, file, line) | |
| /// appends tainted piece to String @see String::real_append | /// appends tainted piece to String @see String::real_append |
| #define APPEND_TAINTED(src, size, file, line) \ | #define APPEND_TAINTED(src, size, file, line) \ |
| APPEND(src, size, String::UL_TAINTED, file, line) | APPEND(src, size, String::UL_TAINTED, file, line) |
| /// handy: appends const char* piece to String @see String::real_append | /// handy: appends const char* piece to String @see String::real_append |
| #define APPEND_CONST(src) APPEND_CLEAN(src, 0, 0, 0) | #define APPEND_CONST(src) APPEND_AS_IS(src, 0, 0, 0) |
| class Array; | typedef uint String_UL; |
| /** | struct String_fragment { |
| Pooled string. | String_UL/*Untaint_lang*/ lang; ///< untaint flag, later untaint language |
| const char* ptr; ///< pointer to the start | |
| size_t size; ///< length | |
| #ifndef NO_STRING_ORIGIN | |
| /// all String pieces hold information of where they come from | |
| struct Origin { | |
| const char* file; ///< macros file name | load file name | sql query text | |
| uint line; ///< file line no | record no | |
| } origin; ///< origin | |
| #endif | |
| }; | |
| Internal structure: | /** |
| @verbatim | String which knows the language of all it's fragments. |
| String Chunk0 | |
| ====== ======== | |
| head--------------->[ptr, size, ...] | |
| append_here-------->[ptr, size, ...] | |
| . | |
| . | |
| [ptr, size, ...] | |
| link_row----------->[link to the next chunk] | |
| @endverbatim | |
| All pieces remember | All pieces remember |
| - the file and its line they are from [can be turned off by NO_STRING_ORIGIN] | - the file and its line they are from [can be turned off by NO_STRING_ORIGIN] |
| - whether they are tainted or not, | - whether they are tainted or not, |
| and the language which should be used to detaint them | and the language which should be used to detaint them |
| */ | */ |
| class String : public Pooled { | |
| public: | |
| enum { | class String: public Array<String_fragment> { |
| CR_PREALLOCATED_COUNT=5, ///< default preallocated item count | size_t fsize; |
| CR_GROW_PERCENT=60 ///< each time the Array chunk_is_full() array expanded() | int count() const; // hiding fro accidental use instead of size() |
| }; | public: |
| /// piece is tainted or not. the language to use when detaint | /** piece is tainted or not. the language to use when detaint |
| remember to change String_Untaint_lang_name @ untaint.C along | |
| */ | |
| enum Untaint_lang { | enum Untaint_lang { |
| UL_UNKNOWN=0, ///< zero value handy for hash lookup @see untaint_lang_name2enum | UL_UNSPECIFIED=0, ///< zero value handy for hash lookup @see untaint_lang_name2enum |
| // these two must go before others, there are checks for >UL_AS_IS | |
| UL_CLEAN, ///< clean | UL_CLEAN, ///< clean |
| UL_TAINTED, ///< tainted, untaint language as assigned later | UL_AS_IS, ///< leave all characters intact |
| // untaint languages. assigned by ^untaint[lang]{...} | |
| UL_PASS_APPENDED, | UL_PASS_APPENDED, |
| /**< | /**< |
| leave language built into string being appended. | leave language built into string being appended. |
| just a flag, that value not stored | just a flag, that value not stored |
| */ | */ |
| UL_AS_IS, ///< leave all characters intact | UL_TAINTED, ///< tainted, untaint language as assigned later |
| UL_FILE_NAME, ///< filename | // untaint languages. assigned by ^untaint[lang]{...} |
| UL_HEADER, ///< text in response header | UL_FILE_SPEC, ///< file specification |
| UL_HTTP_HEADER, ///< text in HTTP response header | |
| UL_MAIL_HEADER, ///< text in mail header | |
| UL_URI, ///< text in uri | UL_URI, ///< text in uri |
| UL_TABLE, ///< ^table:set body | UL_TABLE, ///< ^table:set body |
| UL_SQL, ///< ^table:sql body | UL_SQL, ///< ^table:sql body |
| UL_JS, ///< JavaScript code | UL_JS, ///< JavaScript code |
| UL_XML, ///< ^dom:set xml | |
| UL_HTML, ///< HTML code (for editing) | UL_HTML, ///< HTML code (for editing) |
| UL_HTML_TYPO ///< HTML code with TYPOgraphic replacements (for showing) | UL_OPTIMIZE_BIT = 0x8000 ///< flag, requiring cstr whitespace optimization |
| }; | }; |
| public: | public: |
| String(Pool& apool, const char *src=0, bool tainted=false); | explicit String(const char* src=0, size_t src_size=0, bool tainted=false); |
| String(const String& src); | String(const String& src); |
| bool is_empty() const { return !size(); } | |
| size_t size() const { return fsize; } | size_t size() const { return fsize; } |
| /// convert to C string | /// convert to C string. if 'lang' known, forcing 'lang' to it |
| char *cstr() const { | CharPtr cstr(Untaint_lang lang=UL_AS_IS, |
| char *result=(char *)malloc(size()*UNTAINT_TIMES_BIGGER+1); | SQL_Connection *connection=0, |
| char *eol=store_to(result); | const Request_charsets *charsets=0) const { |
| CharPtr result(new char[cstr_bufsize(lang, connection, charsets)]); | |
| char *eol=store_to(result.get(), lang, connection, charsets); | |
| *eol=0; | |
| return result; | |
| } | |
| char *cstr(Pool& pool, Untaint_lang lang=UL_AS_IS, | |
| SQL_Connection *connection=0, | |
| const Request_charsets *charsets=0) const { | |
| #ifdef HERE1 | |
| #error | |
| #else | |
| #error | |
| #endif | |
| char *result=new(pool) char[cstr_bufsize(lang, connection, charsets)]; | |
| char *eol=store_to(result, lang, connection, charsets); | |
| *eol=0; | *eol=0; |
| return result; | return result; |
| } | } |
| char *cstr_debug_origins(Pool& pool) const; | |
| /// puts pieces to buf | |
| void serialize(Pool& pool, size_t prolog_size, char *& buf, size_t& buf_size) const; | |
| /// appends pieces from buf to self | |
| bool deserialize(size_t prolog_size, void *buf, size_t buf_size, const char* file); | |
| /** append fragment | /** append fragment |
| @see APPEND_CLEAN, APPEND_TAINTED, APPEND_CONST | @see APPEND_AS_IS, APPEND_CLEAN, APPEND_TAINTED, APPEND_CONST |
| */ | */ |
| String& real_append(STRING_APPEND_PARAMS); | String& real_append(STRING_APPEND_PARAMS); |
| /// @return <0 ==0 or >0 depending on comparison result | /// @return <0 ==0 or >0 depending on comparison result |
| int cmp (int& partial, const String& src, | int cmp (int& partial, const String& src, |
| size_t this_offset=0, Untaint_lang lang=UL_UNKNOWN) const; | size_t this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const; |
| bool operator < (const String& src) const { int p; return cmp(p, src)<0; } | bool operator < (const String& src) const { int p; return cmp(p, src)<0; } |
| bool operator > (const String& src) const { int p; return cmp(p, src)>0; } | bool operator > (const String& src) const { int p; return cmp(p, src)>0; } |
| bool operator <= (const String& src) const { int p; return cmp(p, src)<=0; } | bool operator <= (const String& src) const { int p; return cmp(p, src)<=0; } |
| Line 145 public: | Line 177 public: |
| - 2: means @src starts @this | - 2: means @src starts @this |
| */ | */ |
| int cmp(int& partial, const char* src_ptr, size_t src_size=0, | int cmp(int& partial, const char* src_ptr, size_t src_size=0, |
| size_t this_offset=0, Untaint_lang lang=UL_UNKNOWN) const; | size_t this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const; |
| /// this starts with src | |
| bool starts_with(const char* src_ptr, size_t src_size=0) const { | |
| int p; cmp(p, src_ptr, src_size); | |
| return p==0 || p==2; | |
| } | |
| bool operator == (const char* src_ptr) const { | bool operator == (const char* src_ptr) const { |
| size_t src_size=src_ptr?strlen(src_ptr):0; | size_t src_size=src_ptr?strlen(src_ptr):0; |
| if(size() != src_size) | if(size() != src_size) |
| Line 153 public: | Line 190 public: |
| int partial; // unused | int partial; // unused |
| return cmp(partial, src_ptr, src_size)==0; | return cmp(partial, src_ptr, src_size)==0; |
| } | } |
| bool operator != (const char* src_ptr) const { | |
| int partial; // unused | |
| return cmp(partial, src_ptr, 0)!=0; | |
| } | |
| /** | String& append_to(String& dest, uchar lang, bool forced) const; |
| appends other String. | String& append(const String& src, uchar lang, bool forced=false) { |
| return src.append_to(*this, lang, forced); | |
| marking all tainted pieces of it with @a lang. | } |
| or marking ALL pieces of it with a @a lang when @a forced to. | String& operator << (const String& src) { return append(src, UL_PASS_APPENDED); } |
| */ | String& operator << (StringPtr src) { return append(*src, UL_PASS_APPENDED); } |
| String& append(const String& src, Untaint_lang lang, bool forced=false); | String& operator << (const char* src) { return APPEND_CONST(src); } |
| /// simple hash code of string. used by Hash | /// simple hash code of string |
| uint hash_code() const; | uint hash_code() const; |
| /// extracts first char of a string, if any | |
| char first_char() const { | |
| return is_empty()?0:*felements[0].ptr; | |
| } | |
| /// extracts [start, finish) piece of string | /// extracts [start, finish) piece of string |
| String& piece(size_t start, size_t finish) const; | StringPtr mid(size_t start, size_t finish) const; |
| /// @return position of substr in string, -1 means "not found" [String version] | /// @return position of substr in string, -1 means "not found" [String version] |
| int pos(const String& substr, | int pos(const String& substr, |
| size_t this_offset=0, Untaint_lang lang=UL_UNKNOWN) const; | int this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const; |
| /// @return position of substr in string, -1 means "not found" [const char* version] | /// @return position of substr in string, -1 means "not found" [const char* version] |
| int pos(const char *substr, size_t substr_size, | int pos(const char* substr, size_t substr_size=0, |
| size_t this_offset=0, Untaint_lang lang=UL_UNKNOWN) const; | int this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const; |
| void split(Array& result, | void split(Array<StringPtr>& result, |
| size_t *pos_after_ref, | size_t *pos_after_ref, |
| const char *delim, size_t delim_size, | const char* delim, size_t delim_size, |
| Untaint_lang lang, int limit=-1) const; | Untaint_lang lang=UL_UNSPECIFIED, int limit=-1); |
| void split(Array& result, | void split(Array<StringPtr>& result, |
| size_t *pos_after_ref, | size_t *pos_after_ref, |
| const String& delim, | const String& delim, |
| Untaint_lang lang, int limit=-1) const; | Untaint_lang lang=UL_UNSPECIFIED, int limit=-1); |
| bool match(const String *aorigin, | typedef void (*Row_action)(Table& table, Array<StringPtr> *row, |
| int prestart, int prefinish, | |
| int poststart, int postfinish, | |
| void *info); | |
| /** | |
| @return table of found items, if any. | |
| table format is defined and fixed[can be used by others]: | |
| @verbatim | |
| prematch/match/postmatch/1/2/3/... | |
| @endverbatim | |
| */ | |
| TablePtr match(Charset& source_charset, | |
| StringPtr aorigin, | |
| const String& regexp, | const String& regexp, |
| const String *options, | StringPtr options, |
| Table **table) const; | Row_action row_action, void *info, |
| bool *was_global=0) const; | |
| #ifndef NO_STRING_ORIGIN | enum Change_case_kind { |
| /// origin of string. calculated by first row | CC_UPPER, |
| const Origin& origin() const; | CC_LOWER |
| #endif | }; |
| StringPtr change_case(Pool& pool, Charset& source_charset, | |
| Change_case_kind kind); | |
| StringPtr replace(Pool& pool, Dictionary& dict) const; | |
| double as_double(); | |
| int as_int(); | |
| private: | StringPtr join_chains(Pool& pool) const; |
| struct Chunk { | |
| // the number of rows in chunk | |
| size_t count; | |
| union Row { | |
| // fragment | |
| struct { | |
| const char *ptr; // pointer to the start | |
| size_t size; // length | |
| Untaint_lang lang; // untaint flag, later untaint language | |
| #ifndef NO_STRING_ORIGIN | #ifndef NO_STRING_ORIGIN |
| Origin origin; // origin | /// origin of string. calculated by first row |
| const String_fragment::Origin& origin() const; | |
| #endif | #endif |
| } item; | |
| Chunk *link; // link to the next chunk in chain | |
| } rows[CR_PREALLOCATED_COUNT]; | |
| // next rows are here | |
| Chunk *preallocated_link; | |
| } | |
| head; // the head chunk of the chunk chain | |
| // next append would write to this record | |
| Chunk::Row *append_here; | |
| // the address of place where lies address | |
| // of the link to the next chunk to allocate | |
| Chunk::Row *link_row; | |
| private: | |
| // last chunk | |
| Chunk *last_chunk; | |
| // string size | |
| size_t fsize; | |
| // used rows in all chunks | |
| int fused_rows; | |
| private: | |
| bool chunk_is_full() { | |
| return append_here == link_row; | |
| } | |
| void expand(); | |
| char *String::store_to(char *dest) const; | |
| size_t cstr_bufsize(Untaint_lang lang=UL_UNSPECIFIED, | |
| SQL_Connection *connection=0, | |
| const Request_charsets *charsets=0) const; | |
| /// convert to C string, store to 'dest' which must be big enough for proper untaint | |
| char *store_to(char *dest, Untaint_lang lang=UL_UNSPECIFIED, | |
| SQL_Connection *connection=0, | |
| const Request_charsets *charsets=0) const; | |
| /* | |
| void join_chain( | |
| const Chunk*& achunk, const Chunk::Row*& arow, uint& acountdown, | |
| uchar& joined_lang, const char* & joined_ptr, size_t& joined_size) const; | |
| */ | |
| private: //disabled | private: //disabled |
| String& operator = (const String&) { return *this; } | String& operator = (const String&) { return *this; } |
| }; | }; |
| /// simple hash code of string. used by Hash | |
| inline uint hash_code(const String& self) { | |
| return self.hash_code(); | |
| } | |
| /// simple hash code of string. used by Hash | |
| inline uint hash_code(StringPtr self) { | |
| return self->hash_code(); | |
| } | |
| // helpers | |
| #define STRING_PREPARED_FOREACH_FRAGMENT(code) \ | |
| for(; fragment<last; fragment++) { \ | |
| code; \ | |
| } | |
| #define STRING_FOREACH_FRAGMENT(code) \ | |
| { \ | |
| element_type *last = felements+fused; \ | |
| element_type *fragment = felements; \ | |
| STRING_PREPARED_FOREACH_FRAGMENT(code) \ | |
| } | |
| #endif | #endif |