Annotation of parser3/src/classes/void.C, revision 1.42
1.1 parser 1: /** @file
2: Parser: @b VOID parser class.
3:
1.42 ! misha 4: Copyright (c) 2001-2009 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:
1.42 ! misha 8: static const char * const IDENT_VOID_C="$Date: 2008-09-04 13:15:36 $";
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");
1.40 misha 47: if(params.count()>1){
48: ssize_t offset=params.as_int(1, "n must be int", r);
49: if(offset<0)
50: throw Exception(PARSER_RUNTIME,
51: 0,
52: "n(%d) must be >=0", offset);
53: }
1.24 paf 54: // never found
1.29 paf 55: r.write_no_lang(*new VInt(-1));
1.24 paf 56: }
57:
1.29 paf 58: static void _int(Request& r, MethodParams& params) {
59: VVoid& vvoid=GET_SELF(r, VVoid);
60: r.write_no_lang(*new VInt(
61: params.count()==0?vvoid.as_int():params.as_int(0, "default must be int", r)));
1.1 parser 62: }
63:
1.29 paf 64: static void _double(Request& r, MethodParams& params) {
65: VVoid& vvoid=GET_SELF(r, VVoid);
66: r.write_no_lang(*new VDouble(
67: params.count()==0?vvoid.as_double():params.as_double(0, "default must be double", r)));
1.1 parser 68: }
69:
1.37 misha 70: static void _bool(Request& r, MethodParams& params) {
71: VVoid& vvoid=GET_SELF(r, VVoid);
1.42 ! misha 72: r.write_no_lang(VBool::get(params.count()==0?vvoid.as_bool():params.as_bool(0, "default must be bool", r)));
1.37 misha 73: }
74:
1.5 parser 75: #ifndef DOXYGEN
1.26 paf 76: class Void_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.29 paf 77: const String& statement_string;
1.5 parser 78: public:
1.29 paf 79: Void_sql_event_handlers(const String& astatement_string): statement_string(astatement_string) {}
80: bool add_column(SQL_Error& /*error*/, const char* /*str*/, size_t /*length*/) { /* ignore */ return false; }
1.27 paf 81: bool before_rows(SQL_Error& error) {
1.5 parser 82: // there are some result rows, which is wrong
1.38 misha 83: error=SQL_Error(PARSER_RUNTIME,
1.29 paf 84: /*statement_string,*/
1.5 parser 85: "must return nothing");
1.27 paf 86: return true;
1.5 parser 87: }
1.27 paf 88: bool add_row(SQL_Error& /*error*/) { /* never */ return false; }
1.29 paf 89: bool add_row_cell(SQL_Error& /*error*/, const char* /*str*/, size_t /*length*/) { /* never */ return false; }
1.5 parser 90:
91: };
92: #endif
1.34 paf 93:
94: extern int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders);
95: extern void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders);
96:
1.29 paf 97: static void _sql(Request& r, MethodParams& params) {
98: Value& statement=params.as_junction(0, "statement must be code");
1.1 parser 99:
1.33 paf 100: HashStringValue* bind=0;
101: if(params.count()>1) {
102: Value& voptions=params.as_no_junction(1, "options must be hash, not code");
1.36 paf 103: if(voptions.is_defined() && !voptions.is_string())
1.33 paf 104: if(HashStringValue* options=voptions.get_hash()) {
105: int valid_options=0;
106: if(Value* vbind=options->get(sql_bind_name)) {
107: valid_options++;
108: bind=vbind->get_hash();
109: }
110: if(valid_options!=options->count())
1.38 misha 111: throw Exception(PARSER_RUNTIME,
1.33 paf 112: 0,
113: "called with invalid option");
114: } else
1.38 misha 115: throw Exception(PARSER_RUNTIME,
1.33 paf 116: 0,
117: "options must be hash");
118: }
119:
120: SQL_Driver::Placeholder* placeholders=0;
121: uint placeholders_count=0;
122: if(bind)
123: placeholders_count=marshal_binds(*bind, placeholders);
124:
1.29 paf 125: Temp_lang temp_lang(r, String::L_SQL);
1.18 paf 126: const String& statement_string=r.process_to_string(statement);
1.29 paf 127: const char* statement_cstr=
128: statement_string.cstr(String::L_UNSPECIFIED, r.connection());
129: Void_sql_event_handlers handlers(statement_string);
130: r.connection()->query(
1.33 paf 131: statement_cstr,
132: placeholders_count, placeholders,
1.39 misha 133: 0, SQL_NO_LIMIT,
1.22 paf 134: handlers,
135: statement_string);
1.34 paf 136:
137: if(bind)
138: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.1 parser 139: }
140:
1.32 paf 141: static void _left_right(Request& r, MethodParams& params) {
142: ssize_t sn=params.as_int(0, "n must be int", r);
143: if(sn<0)
1.38 misha 144: throw Exception(PARSER_RUNTIME,
1.32 paf 145: 0,
146: "n(%d) must be >=0", sn);
147:
148: // return nothing
149: }
150:
151: static void _mid(Request& r, MethodParams& params) {
152: ssize_t sbegin=params.as_int(0, "p must be int", r);
153: if(sbegin<0)
1.38 misha 154: throw Exception(PARSER_RUNTIME,
1.32 paf 155: 0,
156: "p(%d) must be >=0", sbegin);
157:
158: if(params.count()>1) {
159: ssize_t sn=params.as_int(1, "n must be int", r);
160: if(sn<0)
1.38 misha 161: throw Exception(PARSER_RUNTIME,
1.32 paf 162: 0,
163: "n(%d) must be >=0", sn);
164: }
165:
166: // return nothing
167: }
168:
1.1 parser 169: // constructor
170:
1.29 paf 171: MVoid::MVoid(): Methoded("void") {
1.23 paf 172: // ^void.length[]
173: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.24 paf 174:
175: // ^void.pos[substr]
1.41 misha 176: // ^void.pos[substr](n)
1.40 misha 177: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 2);
1.23 paf 178:
1.32 paf 179: // ^void.int[]
1.9 parser 180: // ^void.int(default)
1.8 parser 181: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1 parser 182:
1.32 paf 183: // ^void.double[]
1.9 parser 184: // ^void.double(default)
1.8 parser 185: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.1 parser 186:
1.37 misha 187: // ^void.bool[]
188: // ^void.bool(default)
189: add_native_method("bool", Method::CT_DYNAMIC, _bool, 0, 1);
190:
1.41 misha 191: // ^void:sql{query}
1.33 paf 192: add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
1.32 paf 193:
194: // ^void.left() ^void.right()
195: add_native_method("left", Method::CT_DYNAMIC, _left_right, 1, 1);
196: add_native_method("right", Method::CT_DYNAMIC, _left_right, 1, 1);
197:
198: // ^void.mid(p;n)
199: add_native_method("mid", Method::CT_DYNAMIC, _mid, 1, 2);
1.1 parser 200: }
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