Annotation of parser3/src/classes/void.C, revision 1.38
1.1 parser 1: /** @file
2: Parser: @b VOID parser class.
3:
1.35 paf 4: Copyright (c) 2001-2005 ArtLebedev Group (http://www.artlebedev.com)
1.16 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.20 paf 6: */
1.1 parser 7:
1.38 ! misha 8: static const char * const IDENT_VOID_C="$Date: 2007/02/03 18:08:38 $";
1.1 parser 9:
10: #include "classes.h"
1.29 paf 11: #include "pa_vmethod_frame.h"
12:
1.1 parser 13: #include "pa_request.h"
14: #include "pa_vint.h"
15: #include "pa_vdouble.h"
16: #include "pa_vvoid.h"
1.37 misha 17: #include "pa_vbool.h"
1.1 parser 18: #include "pa_sql_connection.h"
19:
1.33 paf 20: // externs
21:
22: extern String sql_bind_name;
23:
1.1 parser 24: // class
25:
1.29 paf 26: class MVoid: public Methoded {
1.1 parser 27: public:
1.29 paf 28: MVoid();
1.1 parser 29: public: // Methoded
30: bool used_directly() { return true; }
31: };
32:
1.29 paf 33: // global variable
34:
35: DECLARE_CLASS_VAR(void, new MVoid, 0);
36:
1.1 parser 37: // methods
38:
1.29 paf 39: static void _length(Request& r, MethodParams&) {
1.24 paf 40: // always zero
1.29 paf 41: r.write_no_lang(*new VInt(0));
1.23 paf 42: }
43:
1.29 paf 44: static void _pos(Request& r, MethodParams& params) {
45: // just checking for consistency
46: params.as_no_junction(0, "substr must not be code");
1.24 paf 47: // never found
1.29 paf 48: r.write_no_lang(*new VInt(-1));
1.24 paf 49: }
50:
1.29 paf 51: static void _int(Request& r, MethodParams& params) {
52: VVoid& vvoid=GET_SELF(r, VVoid);
53: r.write_no_lang(*new VInt(
54: params.count()==0?vvoid.as_int():params.as_int(0, "default must be int", r)));
1.1 parser 55: }
56:
1.29 paf 57: static void _double(Request& r, MethodParams& params) {
58: VVoid& vvoid=GET_SELF(r, VVoid);
59: r.write_no_lang(*new VDouble(
60: params.count()==0?vvoid.as_double():params.as_double(0, "default must be double", r)));
1.1 parser 61: }
62:
1.37 misha 63: static void _bool(Request& r, MethodParams& params) {
64: VVoid& vvoid=GET_SELF(r, VVoid);
65: r.write_no_lang(*new VBool(
66: params.count()==0?vvoid.as_bool():params.as_bool(0, "default must be bool", r)));
67: }
68:
1.5 parser 69: #ifndef DOXYGEN
1.26 paf 70: class Void_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.29 paf 71: const String& statement_string;
1.5 parser 72: public:
1.29 paf 73: Void_sql_event_handlers(const String& astatement_string): statement_string(astatement_string) {}
74: bool add_column(SQL_Error& /*error*/, const char* /*str*/, size_t /*length*/) { /* ignore */ return false; }
1.27 paf 75: bool before_rows(SQL_Error& error) {
1.5 parser 76: // there are some result rows, which is wrong
1.38 ! misha 77: error=SQL_Error(PARSER_RUNTIME,
1.29 paf 78: /*statement_string,*/
1.5 parser 79: "must return nothing");
1.27 paf 80: return true;
1.5 parser 81: }
1.27 paf 82: bool add_row(SQL_Error& /*error*/) { /* never */ return false; }
1.29 paf 83: bool add_row_cell(SQL_Error& /*error*/, const char* /*str*/, size_t /*length*/) { /* never */ return false; }
1.5 parser 84:
85: };
86: #endif
1.34 paf 87:
88: extern int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders);
89: extern void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders);
90:
1.29 paf 91: static void _sql(Request& r, MethodParams& params) {
92: Value& statement=params.as_junction(0, "statement must be code");
1.1 parser 93:
1.33 paf 94: HashStringValue* bind=0;
95: if(params.count()>1) {
96: Value& voptions=params.as_no_junction(1, "options must be hash, not code");
1.36 paf 97: if(voptions.is_defined() && !voptions.is_string())
1.33 paf 98: if(HashStringValue* options=voptions.get_hash()) {
99: int valid_options=0;
100: if(Value* vbind=options->get(sql_bind_name)) {
101: valid_options++;
102: bind=vbind->get_hash();
103: }
104: if(valid_options!=options->count())
1.38 ! misha 105: throw Exception(PARSER_RUNTIME,
1.33 paf 106: 0,
107: "called with invalid option");
108: } else
1.38 ! misha 109: throw Exception(PARSER_RUNTIME,
1.33 paf 110: 0,
111: "options must be hash");
112: }
113:
114: SQL_Driver::Placeholder* placeholders=0;
115: uint placeholders_count=0;
116: if(bind)
117: placeholders_count=marshal_binds(*bind, placeholders);
118:
1.29 paf 119: Temp_lang temp_lang(r, String::L_SQL);
1.18 paf 120: const String& statement_string=r.process_to_string(statement);
1.29 paf 121: const char* statement_cstr=
122: statement_string.cstr(String::L_UNSPECIFIED, r.connection());
123: Void_sql_event_handlers handlers(statement_string);
124: r.connection()->query(
1.33 paf 125: statement_cstr,
126: placeholders_count, placeholders,
127: 0, 0,
1.22 paf 128: handlers,
129: statement_string);
1.34 paf 130:
131: if(bind)
132: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.1 parser 133: }
134:
1.32 paf 135: static void _left_right(Request& r, MethodParams& params) {
136: ssize_t sn=params.as_int(0, "n must be int", r);
137: if(sn<0)
1.38 ! misha 138: throw Exception(PARSER_RUNTIME,
1.32 paf 139: 0,
140: "n(%d) must be >=0", sn);
141:
142: // return nothing
143: }
144:
145: static void _mid(Request& r, MethodParams& params) {
146: ssize_t sbegin=params.as_int(0, "p must be int", r);
147: if(sbegin<0)
1.38 ! misha 148: throw Exception(PARSER_RUNTIME,
1.32 paf 149: 0,
150: "p(%d) must be >=0", sbegin);
151:
152: if(params.count()>1) {
153: ssize_t sn=params.as_int(1, "n must be int", r);
154: if(sn<0)
1.38 ! misha 155: throw Exception(PARSER_RUNTIME,
1.32 paf 156: 0,
157: "n(%d) must be >=0", sn);
158: }
159:
160: // return nothing
161: }
162:
1.1 parser 163: // constructor
164:
1.29 paf 165: MVoid::MVoid(): Methoded("void") {
1.23 paf 166: // ^void.length[]
167: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.24 paf 168:
169: // ^void.pos[substr]
170: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.23 paf 171:
1.32 paf 172: // ^void.int[]
1.9 parser 173: // ^void.int(default)
1.8 parser 174: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1 parser 175:
1.32 paf 176: // ^void.double[]
1.9 parser 177: // ^void.double(default)
1.8 parser 178: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.1 parser 179:
1.37 misha 180: // ^void.bool[]
181: // ^void.bool(default)
182: add_native_method("bool", Method::CT_DYNAMIC, _bool, 0, 1);
183:
1.1 parser 184: // ^sql[query]
1.33 paf 185: add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
1.32 paf 186:
187: // ^void.left() ^void.right()
188: add_native_method("left", Method::CT_DYNAMIC, _left_right, 1, 1);
189: add_native_method("right", Method::CT_DYNAMIC, _left_right, 1, 1);
190:
191: // ^void.mid(p;n)
192: add_native_method("mid", Method::CT_DYNAMIC, _mid, 1, 2);
1.1 parser 193: }
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