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| version 1.45, 2002/08/01 11:26:48 | version 1.48.2.11.2.9, 2003/04/14 11:23:41 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: table class decl. | Parser: table 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) |
| */ | */ |
| #ifndef PA_TABLE_H | #ifndef PA_TABLE_H |
| #define PA_TABLE_H | #define PA_TABLE_H |
| static const char* IDENT_TABLE_H="$Id$"; | static const char* IDENT_TABLE_H="$Date$"; |
| #include "pa_types.h" | #include "pa_types.h" |
| #include "pa_array.h" | |
| #include "pa_hash.h" | #include "pa_hash.h" |
| #include "pa_string.h" | #include "pa_string.h" |
| Line 29 static const char* IDENT_TABLE_H="$Id$"; | Line 28 static const char* IDENT_TABLE_H="$Id$"; |
| rows and strings stored are read-only. once stored they can be removed, | rows and strings stored are read-only. once stored they can be removed, |
| but not altered. that's handy for quick copying & co. see table:join | but not altered. that's handy for quick copying & co. see table:join |
| */ | */ |
| class Table : public Array { | class Table: public Array<ArrayString*> { |
| public: | public: |
| typedef ArrayString* columns_type; | |
| Table(Pool& apool, | struct Action_options { |
| const String *aorigin, | size_t offset; |
| const Array *acolumns, | size_t limit; //< negative limit means 'all'. zero limit means 'nothing' |
| int initial_rows=CR_INITIAL_ROWS_DEFAULT); | bool reverse; |
| Table(const Table& source); | bool defined; |
| Table(Pool& apool, const Table& source, int offset=0); | |
| Action_options(): | |
| /// where this table came from, may be NULL | offset(0), limit(ARRAY_OPTION_LIMIT_ALL), reverse(false), |
| const String *origin_string() { return forigin_string; } | defined(false) {} |
| }; | |
| Table( | |
| columns_type acolumns, | |
| size_t initial_rows=3); | |
| Table(const Table& src, Action_options& options); | |
| /// gets column names | /// gets column names |
| const Array *columns() { return fcolumns; } | columns_type columns() { return fcolumns; } |
| /// assignes column names | |
| void set_columns(const Array *acolumns) { fcolumns=acolumns; } | |
| /// moves @a current pointer | /// moves @a current pointer |
| void set_current(int acurrent) { fcurrent=acurrent; } | void set_current(size_t acurrent) { |
| assert(acurrent<count()); | |
| fcurrent=acurrent; | |
| } | |
| /// @return current pointer | /// @return current pointer |
| int current() { return fcurrent; } | size_t current() const { return fcurrent; } |
| void offset(bool absolute, int offset); | void offset(bool absolute, int offset); |
| /** @return column index from @a column_name. '<0' if no such column | /** @return column index from @a column_name. '<0' if no such column |
| if no such colum conditionally 'bark' | if no such - 'bark' |
| */ | */ |
| int column_name2index(const String& column, bool bark) const; | int column_name2index(const String& column, bool bark) const; |
| /// @return item from @a column | /// @return item from @a column |
| const String *item(int column) const; | const String* item(size_t column); |
| /// @return item from @a column. '0' if no such column | /// @return item from @a column. '0' if no such column |
| const String *item(const String& column) const { | const String* item(const String& column) { |
| int index=column_name2index(column, false); | int index=column_name2index(column, false); |
| return index>=0?item(index):0; | return index>=0?item(index):0; |
| } | } |
| Line 71 public: | Line 78 public: |
| /// saves to text file | /// saves to text file |
| void save(bool nameless_save, const String& file_spec); | void save(bool nameless_save, const String& file_spec); |
| bool locate(int column, const String& value); | template<typename I> |
| bool locate(const String& column, const String& value); | bool locate(bool (*func)(Table& self, I* info), void* info, Action_options& o) { |
| size_t count=this->count(); | |
| if(!count || !o.limit) | |
| return false; | |
| size_t row=o.offset; | |
| if(row>=count) | |
| return false; | |
| // max(limit) | |
| size_t m=o.reverse? | |
| o.offset | |
| :count-o.offset; | |
| if(!m) | |
| return false; | |
| // fix limit | |
| if(o.limit==ARRAY_OPTION_LIMIT_ALL || o.limit>m) | |
| o.limit=m; | |
| size_t saved_current=current(); | |
| if(o.reverse) { // reverse | |
| for(size_t to=row-o.limit; row>=to; --row) { | |
| set_current(row); | |
| if(func(*this, info)) | |
| return true; | |
| } | |
| } else { // forward | |
| for(size_t to=row+o.limit; row<to; row++) { | |
| set_current(row); | |
| if(func(*this, info)) | |
| return true; | |
| } | |
| } | |
| set_current(saved_current); | |
| const Array& at(int index) const { | return false; |
| // force @c const result | |
| return *const_cast<const Array *>(static_cast<Array *>(get(index))); | |
| } | } |
| bool locate(int column, const String& value, Action_options& options); | |
| bool locate(const String& column, const String& value, Action_options& options); | |
| private: | private: |
| // where this table came from, may be NULL | |
| const String *forigin_string; | |
| // column name->number lookup table | |
| Hash& name2number; | |
| // current row | // current row |
| int fcurrent; | size_t fcurrent; |
| // columns | // columns |
| const Array *fcolumns; | columns_type fcolumns; |
| // column names are already referenced in fcolumns, no need to doublecheck references here | |
| // column name->number lookup table | |
| typedef Hash<const StringBody, int> name2number_hash_class; | |
| name2number_hash_class* name2number; | |
| // we own columns? | |
| bool valid(int index) const { return index>=0 && index<size(); } | bool valid(size_t index) const { return index>=0 && index<count(); } |
| }; | }; |