Annotation of parser3/src/classes/hashfile.C, revision 1.24
1.1 parser 1: /** @file
2: Parser: @b hashfile parser class.
3:
1.24 ! paf 4: Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
1.22 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.24 ! paf 6: */
! 7:
1.1 parser 8:
1.24 ! paf 9: static const char* IDENT="$Id: hashfile.C,v 1.22 2002/02/08 08:30:10 paf Exp $";
1.1 parser 10:
1.4 parser 11: #include "classes.h"
1.1 parser 12:
13: #include "pa_request.h"
1.24 ! paf 14: #include "pa_vmethod_frame.h"
1.1 parser 15: #include "pa_vhashfile.h"
16: #include "pa_vhash.h"
17:
18: // class
19:
20: class MHashfile : public Methoded {
21: public: // VStateless_class
1.24 ! paf 22: Value *create_new_value() { return new VHashfile; }
1.1 parser 23:
24: public:
1.24 ! paf 25: MHashfile();
1.1 parser 26: public: // Methoded
27: bool used_directly() { return true; }
28: };
29:
1.24 ! paf 30: // global variable
! 31:
! 32: DECLARE_CLASS_VAR(hashfile, new MHashfile, 0);
! 33:
1.1 parser 34: // methods
35:
1.24 ! paf 36: static void _open(Request& r, MethodParams& params) {
! 37: VHashfile& self=GET_SELF(r, VHashfile);
1.1 parser 38:
1.24 ! paf 39: self.open(r.absolute(params.as_string(0, "filename must be string")));
1.9 paf 40: }
1.1 parser 41:
1.24 ! paf 42: #if LATER
! 43: static void _hash(Request& r, MethodParams& params) {
! 44: VHashfile& self=GET_SELF(r, VHashfile);
1.5 parser 45:
46: // write out result
47: VHash& result=*new(pool) VHash(pool, *self.get_hash(&method_name));
48: result.set_name(method_name);
49: r.write_no_lang(result);
50: }
51:
1.24 ! paf 52: static void _delete(Request& r, MethodParams& params) {
! 53: VHashfile& self=GET_SELF(r, VHashfile);
1.8 parser 54:
1.24 ! paf 55: if(params.size()==0)
1.8 parser 56: self.mark_to_cancel_cache();
57: else {
58: // key
1.24 ! paf 59: const String &key=params.as_string(0, "key must be string");
1.8 parser 60: // remove
1.20 paf 61: self.get_table_ptr(&method_name)->remove(key);
1.8 parser 62: }
63: }
64:
1.24 ! paf 65: #endif
! 66: static void _clear(Request& r, MethodParams&) {
! 67: VHashfile& self=GET_SELF(r, VHashfile);
! 68: self.clear();
1.12 paf 69: }
70:
1.24 ! paf 71: #if LATER
! 72: static void _foreach(Request& r, MethodParams& params) {
! 73: VHashfile& self=GET_SELF(r, VHashfile);
! 74:
! 75: const String& key_var_name=params.as_string(0, "key-var name must be string");
! 76: const String& value_var_name=params.as_string(1, "value-var name must be string");
! 77: Value& body_code=params.as_junction(2, "body must be code");
! 78: Value *delim_maybe_code=params.size()>3?¶ms.get(3):0;
1.14 paf 79:
80: bool need_delim=false;
81: Value& var_context=*body_code.get_junction()->wcontext;
82: VString& vkey=*new(pool) VString(pool);
83: VString& vvalue=*new(pool) VString(pool);
84:
1.20 paf 85: DB_Cursor cursor(*self.get_table_ptr(&method_name), &method_name);
1.14 paf 86: while(true) {
87: String *key;
88: String *data;
89: if(!cursor.get(pool, key, data, DB_NEXT))
90: break;
91:
92: if(!key)
93: continue; // expired
94:
95: vkey.set_string(*key);
96: vvalue.set_string(*data);
97: var_context.put_element(key_var_name, &vkey);
98: var_context.put_element(value_var_name, &vvalue);
99:
100: Value& processed_body=r.process(body_code);
101: if(delim_maybe_code) { // delimiter set?
102: const String *string=processed_body.get_string();
103: if(need_delim && string && string->size()) // need delim & iteration produced string?
104: r.write_pass_lang(r.process(*delim_maybe_code));
105: need_delim=true;
106: }
107: r.write_pass_lang(processed_body);
108: }
109: }
110:
1.24 ! paf 111: #endif
1.1 parser 112: // constructor
113:
1.24 ! paf 114: MHashfile::MHashfile(): Methoded("hashfile") {
1.9 paf 115: // ^hashfile::open[db_home;filename]
1.24 ! paf 116: add_native_method("open", Method::CT_DYNAMIC, _open, 1, 1);
1.5 parser 117: // ^hash[]
1.24 ! paf 118: // add_native_method("hash", Method::CT_DYNAMIC, _hash, 0, 0);
1.8 parser 119: // ^hashfile.delete[key]
1.24 ! paf 120: // add_native_method("delete", Method::CT_DYNAMIC, _delete, 0, 1);
1.12 paf 121: // ^hashfile.clear[]
122: add_native_method("clear", Method::CT_DYNAMIC, _clear, 0, 0);
1.14 paf 123: // ^hashfile.foreach[key;value]{code}[delim]
1.24 ! paf 124: // add_native_method("foreach", Method::CT_DYNAMIC, _foreach, 2+1, 2+1+1);
1.1 parser 125: }
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