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| version 1.129, 2002/02/20 12:40:24 | version 1.144.2.28.2.3, 2003/03/19 12:22:35 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: string class decl. | Parser: string class decl. |
| Copyright (c) 2001, 2002 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: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| $Id$ | |
| */ | */ |
| #ifndef PA_STRING_H | #ifndef PA_STRING_H |
| #define PA_STRING_H | #define PA_STRING_H |
| #include "pa_pool.h" | static const char* IDENT_STRING_H="$Date$"; |
| // includes | |
| #include "pa_types.h" | #include "pa_types.h" |
| #include "pa_array.h" | |
| #include "cord.h" | |
| // forwards | |
| class Charset; | |
| class Table; DECLARE_OBJECT_PTR(Table); | |
| class SQL_Connection; | |
| class Dictionary; | |
| class Request_charsets; | |
| class String; | |
| typedef Array<const String* > ArrayString; | |
| class Table; | // helpers |
| #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, \ |
| uchar lang, \ | Untaint_lang 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, \ |
| uchar lang | Untaint_lang 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) |
| Line 44 class Table; | Line 58 class Table; |
| /// 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_AS_IS(src, 0, 0, 0) | #define APPEND_CONST(src) APPEND_AS_IS(src, 0, 0, 0) |
| class Array; | |
| class SQL_Connection; | |
| class Dictionary; | |
| /** | /** |
| Pooled string. | String which knows the language of all it's fragments. |
| Internal structure: | |
| @verbatim | |
| 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] | |
| - 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 |
| */ | */ |
| #include "pa_pragma_pack_begin.h" | |
| class String : public Pooled { | |
| public: | |
| enum { | class String: public PA_Object { |
| CR_PREALLOCATED_COUNT=2, ///< default preallocated item count | |
| CR_GROW_COUNT=1 ///< each time the String chunk_is_full() string expanded() | 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 | remember to change String_Untaint_lang_name @ untaint.C along |
| Line 102 public: | Line 95 public: |
| UL_JS, ///< JavaScript code | UL_JS, ///< JavaScript code |
| UL_XML, ///< ^dom:set xml | UL_XML, ///< ^dom:set xml |
| UL_HTML, ///< HTML code (for editing) | UL_HTML, ///< HTML code (for editing) |
| UL_OPTIMIZE_BIT = 0x80 ///< flag, requiring cstr whitespace optimization | UL_OPTIMIZE_BIT = 0x8000 ///< flag, requiring cstr whitespace optimization |
| }; | }; |
| struct Fragment { | |
| Untaint_lang lang; ///< untaint flag, later untaint language | |
| size_t size; ///< size | |
| Fragment(Untaint_lang alang, size_t asize): lang(alang), size(asize) {} | |
| }; | |
| class ArrayFragment: public Array<Fragment> { | |
| void simple_append(element_type src) { | |
| *static_cast<Array<Fragment> *>(this)+=src; | |
| } | |
| public: | |
| ArrayFragment& operator += (element_type src) { | |
| if(count()) { // not empty? | |
| // try to join with last | |
| Fragment& last=get(count()-1); | |
| if(last.lang==src.lang) { | |
| last.size+=src.size; | |
| return *this; | |
| } | |
| } | |
| simple_append(src); | |
| return *this; | |
| } | |
| ArrayFragment& append(const ArrayFragment& src, size_t substr_start, size_t substr_end); | |
| }; | |
| private: | |
| CORD body; ///< all characters of string | |
| ArrayFragment fragments; ///< fragment language+size info | |
| public: | public: |
| String(Pool& apool, const char *src=0, size_t src_size=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 append_here==head.rows; } | operator bool() const { return body!=CORD_EMPTY; } |
| size_t size() const; | size_t size() const { return CORD_len(body); } |
| struct C { | |
| char *str; | |
| size_t size; | |
| operator char *() { return str; } | |
| C(char *astr, size_t asize): str(astr), size(asize) {} | |
| }; | |
| /// convert to C string. if 'lang' known, forcing 'lang' to it | /// convert to C string. if 'lang' known, forcing 'lang' to it |
| char *cstr(Untaint_lang lang=UL_AS_IS, | C cstr(Untaint_lang lang=UL_AS_IS, |
| SQL_Connection *connection=0, | SQL_Connection *connection=0, |
| Charset *cstr_charset=0) const { | const Request_charsets *charsets=0) const { |
| char *result=(char *)malloc(cstr_bufsize(lang, connection, cstr_charset)); | char* cstr=new char[cstr_bufsize(lang, connection, charsets)]; |
| char *eol=store_to(result, lang, connection, cstr_charset); | char* eol=store_to(cstr, lang, connection, charsets); |
| *eol=0; | *eol=0; |
| return result; | return C(cstr, eol-cstr); |
| } | } |
| char *cstr_debug_origins() const; | |
| /// puts pieces to buf | /// puts pieces to buf |
| void serialize(size_t prolog_size, void *& buf, size_t& buf_size) const; | void serialize(size_t prolog_size, char *& buf, size_t& buf_size) const; |
| /// appends pieces from buf to self | /// appends pieces from buf to self |
| void deserialize(size_t prolog_size, void *buf, size_t buf_size, const char *file); | bool deserialize(size_t prolog_size, void *buf, size_t buf_size, const char* file); |
| /** append fragment | /** append fragment |
| @see APPEND_AS_IS, 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 | |
| int cmp (int& partial, const String& src, | |
| 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 { | |
| if(size()!=src.size()) // can speed up in trivial case | |
| return false; | |
| int p; return cmp(p, src)==0; | |
| } | |
| bool operator != (const String& src) const { int p; return cmp(p, src)!=0; } | |
| /** | /** |
| @param partial | @param partial |
| returns partial match status. | returns partial match status. |
| Line 152 public: | Line 169 public: |
| - 1: means @c this starts @c src | - 1: means @c this starts @c src |
| - 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(CORD substr, size_t this_offset=0) const; |
| size_t this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const; | /// String version of @see cmp(CORD, size_t) |
| bool operator == (const char* src_ptr) const { | //int cmp(const String& src, size_t this_offset=0) const; |
| size_t src_size=src_ptr?strlen(src_ptr):0; | |
| if(size() != src_size) | bool operator < (const String& src) const { return CORD_cmp(body, src.body)<0; } |
| return false; | bool operator > (const String& src) const { return CORD_cmp(body, src.body)>0; } |
| int partial; // unused | bool operator <= (const String& src) const { return CORD_cmp(body, src.body)<=0; } |
| return cmp(partial, src_ptr, src_size)==0; | bool operator >= (const String& src) const { return CORD_cmp(body, src.body)>=0; } |
| } | bool operator == (const String& src) const { return CORD_cmp(body, src.body)==0; } |
| bool operator != (const char* src_ptr) const { | bool operator != (const String& src) const { return CORD_cmp(body, src.body)!=0; } |
| int partial; // unused | |
| return cmp(partial, src_ptr, 0)!=0; | /// this starts with y |
| bool starts_with(CORD y) const { | |
| return CORD_ncmp(body, 0/*x_start*/, y, 0/*y_start*/, CORD_len(y))==0; | |
| } | } |
| bool operator == (CORD y) const { return CORD_cmp(body, y)==0; } | |
| bool operator != (CORD y) const { return CORD_cmp(body, y)!=0; } | |
| String& append(const String& src, uchar lang, bool forced=false); | String& append_to(String& dest, Untaint_lang lang, bool forced) const; |
| String& append(const String& src, Untaint_lang lang, bool forced=false) { | |
| return src.append_to(*this, lang, forced); | |
| } | |
| String& operator << (const String& src) { return append(src, UL_PASS_APPENDED); } | String& operator << (const String& src) { return append(src, UL_PASS_APPENDED); } |
| String& operator << (const char *src) { return APPEND_CONST(src); } | //String& operator << (const String* src) { return append(*src, UL_PASS_APPENDED); } |
| 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 | /// extracts first char of a string, if any |
| char first_char() const; | char first_char() const { |
| return operator bool()?CORD_fetch(body, 0):0; | |
| } | |
| /// extracts [start, finish) piece of string | /// extracts [start, finish) piece of string |
| String& mid(size_t start, size_t finish) const; | const String& mid(size_t substr_start, size_t substr_end) const; |
| /// @return position of substr in string, -1 means "not found" [String version] | /// this is result of pos functions which mean that substr were not found |
| int pos(const String& substr, | static const size_t NOT_FOUND; |
| int this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const; | |
| /// @return position of substr in string, -1 means "not found" [const char* version] | /** |
| int pos(const char *substr, size_t substr_size=0, | ignore lang if it's UL_UNSPECIFIED |
| int this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const; | but when specified: look for substring that lies in ONE fragment in THAT lang |
| @return position of substr in string, -1 means "not found" [const char* version] | |
| void split(Array& result, | */ |
| size_t *pos_after_ref, | size_t pos(CORD substr, |
| const char *delim, size_t delim_size, | size_t this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const; |
| Untaint_lang lang=UL_UNSPECIFIED, int limit=-1) const; | /// String version of @see pos(const char*, int, Untaint_lang) |
| void split(Array& result, | size_t pos(const String& substr, |
| size_t *pos_after_ref, | size_t this_offset=0, Untaint_lang lang=UL_UNSPECIFIED) const; |
| void split(ArrayString& result, | |
| size_t& pos_after_ref, | |
| const char* delim, | |
| Untaint_lang lang=UL_UNSPECIFIED, int limit=-1); | |
| void split(ArrayString& result, | |
| size_t& pos_after_ref, | |
| const String& delim, | const String& delim, |
| Untaint_lang lang=UL_UNSPECIFIED, int limit=-1) const; | Untaint_lang lang=UL_UNSPECIFIED, int limit=-1) const; |
| typedef void (*Row_action)(Table& table, Array *row, int start, int finish, | typedef void (*Row_action)(Table* table, ArrayString* row, |
| int prestart, int prefinish, | |
| int poststart, int postfinish, | |
| void *info); | void *info); |
| /** | /** |
| @return true if fills table. | @return table of found items, if any. |
| table format is defined and fixed[can be used by others]: | table format is defined and fixed[can be used by others]: |
| @verbatim | @verbatim |
| prematch/match/postmatch/1/2/3/... | prematch/match/postmatch/1/2/3/... |
| @endverbatim | @endverbatim |
| */ | */ |
| bool match( | Table* match(Charset& source_charset, |
| const String *aorigin, | |
| const String& regexp, | const String& regexp, |
| const String *options, | const String& options, |
| Table **table, | |
| Row_action row_action, void *info, | Row_action row_action, void *info, |
| bool *was_global=0) const; | bool& just_matched) const; |
| enum Change_case_kind { | enum Change_case_kind { |
| CC_UPPER, | CC_UPPER, |
| CC_LOWER | CC_LOWER |
| }; | }; |
| String& change_case(Pool& pool, | String& change_case(Charset& source_charset, |
| Change_case_kind kind) const; | Change_case_kind kind); |
| String& replace(Pool& pool, Dictionary& dict) const; | const String& replace(const Dictionary& dict) const; |
| double as_double() const; | double as_double(); |
| int as_int() const; | int as_int(); |
| #ifndef NO_STRING_ORIGIN | |
| /// origin of string. calculated by first row | |
| const Origin& origin() const; | |
| #endif | |
| private: | |
| /** several String fragments | |
| 'mutable' because can write after it's end, after it was appended to somebody | |
| @see String::append | |
| */ | |
| mutable struct Chunk { | |
| typedef uchar count_type; | |
| count_type count; ///< the number of rows in chunk | |
| /// string fragment or a link to next chunk union | |
| union Row { | |
| typedef uchar item_size_type; | |
| /// fragment | |
| struct { | |
| const char *ptr; ///< pointer to the start | |
| item_size_type size; ///< length | |
| uchar/*Untaint_lang*/ lang; ///< untaint flag, later untaint language | |
| #ifndef NO_STRING_ORIGIN | |
| Origin origin; ///< origin | |
| #endif | |
| } item; | |
| Chunk *link; ///< link to the next chunk in chain | |
| } rows[CR_PREALLOCATED_COUNT]; | |
| } | |
| head; ///< the head chunk of the chunk chain | |
| Chunk *initial_head_link; ///< next rows initially are here[can shrink! @see String::append]. must go right after 'head' | |
| /// next append would write to this record | |
| Chunk::Row *append_here; | |
| private: | |
| /// last chunk | |
| mutable Chunk *last_chunk; | |
| private: | |
| bool chunk_is_full() { | size_t cstr_bufsize(Untaint_lang lang=UL_UNSPECIFIED, |
| return append_here == last_chunk->rows+last_chunk->count; | SQL_Connection *connection=0, |
| } | const Request_charsets *charsets=0) const; |
| uint used_rows() const; | |
| void expand(); | |
| Untaint_lang lang_of(size_t offset) const; | |
| size_t cstr_bufsize(Untaint_lang lang, | |
| SQL_Connection *connection, | |
| Charset *buf_charset) const; | |
| /// convert to C string, store to 'dest' which must be big enough for proper untaint | /// 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, | char *store_to(char *dest, Untaint_lang lang=UL_UNSPECIFIED, |
| SQL_Connection *connection=0, | SQL_Connection *connection=0, |
| Charset *store_to_charset=0) const; | const Request_charsets *charsets=0) const; |
| /* | |
| String& reconstruct(Pool& pool) const; | void join_chain( |
| void join_chain(Pool& pool, | const Chunk*& achunk, const Chunk::Row*& arow, uint& acountdown, |
| uint& ai, const Chunk*& achunk, const Chunk::Row*& arow, | Untaint_lang& joined_lang, const char* & joined_ptr, size_t& joined_size) const; |
| uchar& joined_lang, const char *& joined_ptr, size_t& joined_size) const; | */ |
| String& replace_in_reconstructed(Pool& pool, Dictionary& dict) const; | |
| private: //disabled | private: //disabled |
| String& operator = (const String&) { return *this; } | String& operator = (const String&) { return *this; } |
| }; | }; |
| #include "pa_pragma_pack_end.h" | |
| #define STRING_PREFIX_FOREACH_ROW(src, body) { \ | const size_t String::NOT_FOUND=(size_t)-1; |
| const Chunk *chunk=&(src).head; \ | |
| do { \ | /// simple hash code of string. used by Hash |
| const Chunk::Row *row=chunk->rows; \ | inline uint hash_code(const String& self) { |
| for(uint i=0; i<chunk->count; i++, row++) { \ | return self.hash_code(); |
| if(row==(src).append_here) \ | |
| goto break2; \ | |
| \ | |
| body \ | |
| } \ | |
| chunk=row->link; \ | |
| } while(chunk); \ | |
| } | } |
| #define STRING_FOREACH_ROW(body) STRING_PREFIX_FOREACH_ROW(*this, body) | // helpers |
| #define STRING_SRC_FOREACH_ROW(body) STRING_PREFIX_FOREACH_ROW(src, body) | |
| /* | |
| #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 |