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| version 1.14, 2001/01/29 22:34:57 | version 1.53, 2001/03/25 10:14:38 |
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| Line 1 | Line 1 |
| /* | /** @file |
| $Id$ | Parser: string class decl. |
| */ | |
| /* | Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) |
| String Chunk0 | Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf) |
| ====== ======== | |
| head--------->[ptr, size] | |
| append_here-------->[ptr, size] | |
| link_row ........ | |
| . . | |
| . [ptr, size] | |
| ...........>[link to the next chunk] | |
| $Id$ | |
| */ | */ |
| #ifndef PA_STRING_H | #ifndef PA_STRING_H |
| #define PA_STRING_H | #define PA_STRING_H |
| #ifdef HAVE_CONFIG_H | #include "pa_config_includes.h" |
| #include "pa_config.h" | |
| #endif | |
| #include <stddef.h> | #include <stddef.h> |
| #include "pa_pool.h" | |
| #include "pa_types.h" | #include "pa_types.h" |
| class Pool; | /** |
| $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 const char *src, char *file, uint line | # define STRING_APPEND_PARAMS \ |
| # define APPEND(src, file, line) real_append(src, file, line) | const char *src, size_t size, \ |
| String::Untaint_lang lang, \ | |
| const char *file, uint line | |
| /// appends clean piece to String @see String::real_append | |
| # define APPEND(src, size, file, line) \ | |
| real_append(src, size, String::UL_NO, file, line) | |
| /// appends tainted piece to String @see String::real_append | |
| # define APPEND_TAINTED(src, size, file, line) \ | |
| real_append(src, size, String::UL_YES, file, line) | |
| #else | #else |
| # define STRING_APPEND_PARAMS const char *src | # define STRING_APPEND_PARAMS \ |
| # define APPEND(src, file, line) real_append(src) | const char *src, \ |
| size_t size, \ | |
| String::Untaint_lang lang | |
| /// appends clean piece to String @see String::real_append | |
| # define APPEND(src, size, file, line) \ | |
| real_append(src, size, String::UL_NO) | |
| /// appends tainted piece to String @see String::real_append | |
| # define APPEND_TAINTED(src, size, file, line) \ | |
| real_append(src, size, String::UL_YES) | |
| #endif | #endif |
| /// handy: appends const char* piece to String @see String::real_append | |
| #define APPEND_CONST(src) APPEND(src, 0, 0, 0) | |
| /** | |
| Pooled string. | |
| class String { | 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 | |
| - the file and its line they are from [can be turned off by NO_STRING_ORIGIN] | |
| - whether they are tainted or not, | |
| and the language which should be used to detaint them | |
| */ | |
| class String : public Pooled { | |
| public: | public: |
| enum { | enum { |
| CR_PREALLOCATED_COUNT=5, | CR_PREALLOCATED_COUNT=5, ///< default preallocated item count |
| CR_GROW_PERCENT=60 | CR_GROW_PERCENT=60 ///< each time the Array chunk_is_full() array expanded() |
| }; | |
| /// piece is tainted or not. the language to use when detaint | |
| enum Untaint_lang { | |
| UL_UNKNOWN=0, ///< when get by name fails | |
| UL_NO, ///< clean | |
| UL_YES, ///< tainted, untaint language as assigned later | |
| // untaint languages. assigned by ^untaint[lang]{...} | |
| UL_PASS_APPENDED, | |
| /**< | |
| leave language built into string being appended. | |
| just a flag, that value not stored | |
| */ | |
| UL_AS_IS, ///< leave all characters intact | |
| UL_FILE_NAME, ///< filename | |
| UL_HEADER, ///< text in response header | |
| UL_URI, ///< text in uri | |
| UL_TABLE, ///< ^table:set body | |
| UL_SQL, ///< ^table:sql body | |
| UL_JS, ///< JavaScript code | |
| UL_HTML, ///< HTML code (for editing) | |
| UL_HTML_TYPO ///< HTML code with TYPOgraphic replacements (for showing) | |
| }; | }; |
| public: | public: |
| void *operator new(size_t size, Pool& apool); | String(Pool& apool, const char *src=0, bool tainted=false); |
| String(Pool& apool); | |
| String(const String& src); | String(const String& src); |
| size_t size() const { return fsize; } | size_t size() const { return fsize; } |
| int used_rows() const { return fused_rows; } | /// convert to C string |
| char *cstr() const; | char *cstr() const { |
| char *result=(char *)malloc(size()*UNTAINT_TIMES_BIGGER+1); | |
| char *eol=store_to(result); | |
| *eol=0; | |
| return result; | |
| } | |
| /** append fragment | |
| @see APPEND, APPEND_TAINTED, APPEND_CONST | |
| */ | |
| String& real_append(STRING_APPEND_PARAMS); | String& real_append(STRING_APPEND_PARAMS); |
| bool operator == (const String& src) const; | /// @return <0 ==0 or >0 depending on comparison result |
| int cmp (const String& src) const; | |
| bool operator < (const String& src) const { return cmp(src)<0; } | |
| bool operator > (const String& src) const { return cmp(src)>0; } | |
| bool operator <= (const String& src) const { return cmp(src)<=0; } | |
| bool operator >= (const String& src) const { return cmp(src)>=0; } | |
| bool operator == (const String& src) const { | |
| if(size()!=src.size()) // can speed up in trivial case | |
| return false; | |
| return cmp(src)==0; | |
| } | |
| bool operator != (const String& src) const { return cmp(src)!=0; } | |
| uint hash_code() const; | /** |
| @param partial | |
| returns partial match status. | |
| - -1: strings too different | |
| - 0: full match | |
| - 1: means @c this starts @c src | |
| - 2: means @src starts @this | |
| */ | |
| int cmp(const char* src_ptr, int& partial, size_t src_size=0) const; | |
| bool operator == (const char* src_ptr) const { | |
| size_t src_size=src_ptr?strlen(src_ptr):0; | |
| if(size() != src_size) | |
| return false; | |
| int partial; // unused | |
| return cmp(src_ptr, partial, src_size)==0; | |
| } | |
| const Origin& origin() const { return head.rows[0].item.origin; } | /** |
| appends other String. | |
| protected: | marking all tainted pieces of it with @a lang. |
| or marking ALL pieces of it with a @a lang when @a forced to. | |
| */ | |
| String& append(const String& src, Untaint_lang lang, bool forced=false); | |
| /// simple hash code of string. used by Hash | |
| uint hash_code() const; | |
| // the pool I'm allocated on | #ifndef NO_STRING_ORIGIN |
| Pool& pool; | /// origin of string. calculated by first row |
| const Origin& origin() const; | |
| #endif | |
| private: | private: |
| Line 70 private: | Line 170 private: |
| // the number of rows in chunk | // the number of rows in chunk |
| int count; | int count; |
| union Row { | union Row { |
| // chunk item | // fragment |
| struct { | struct { |
| const char *ptr; // pointer to the start of string fragment | const char *ptr; // pointer to the start |
| size_t size; // length of the fragment | size_t size; // length |
| Origin origin; // origin of this fragment | Untaint_lang lang; // untaint flag, later untaint language |
| #ifndef NO_STRING_ORIGIN | |
| Origin origin; // origin | |
| #endif | |
| } item; | } item; |
| Chunk *link; // link to the next chunk in chain | Chunk *link; // link to the next chunk in chain |
| } rows[CR_PREALLOCATED_COUNT]; | } rows[CR_PREALLOCATED_COUNT]; |
| Line 91 private: | Line 194 private: |
| Chunk::Row *link_row; | Chunk::Row *link_row; |
| private: | private: |
| // last chank allocated count | // last chunk |
| int curr_chunk_rows; | Chunk *last_chunk; |
| // string size | // string size |
| size_t fsize; | size_t fsize; |
| Line 106 private: | Line 209 private: |
| return append_here == link_row; | return append_here == link_row; |
| } | } |
| void expand(); | void expand(); |
| void set_lang(Chunk::Row *row, Untaint_lang lang, bool forced, size_t size); | |
| char *String::store_to(char *dest) const; | |
| private: //disabled | private: //disabled |