Annotation of parser3/src/classes/void.C, revision 1.40
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:
1.40 ! misha 8: static const char * const IDENT_VOID_C="$Date: 2008-06-26 15:00:42 $";
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);
72: r.write_no_lang(*new VBool(
73: params.count()==0?vvoid.as_bool():params.as_bool(0, "default must be bool", r)));
74: }
75:
1.5 parser 76: #ifndef DOXYGEN
1.26 paf 77: class Void_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.29 paf 78: const String& statement_string;
1.5 parser 79: public:
1.29 paf 80: Void_sql_event_handlers(const String& astatement_string): statement_string(astatement_string) {}
81: bool add_column(SQL_Error& /*error*/, const char* /*str*/, size_t /*length*/) { /* ignore */ return false; }
1.27 paf 82: bool before_rows(SQL_Error& error) {
1.5 parser 83: // there are some result rows, which is wrong
1.38 misha 84: error=SQL_Error(PARSER_RUNTIME,
1.29 paf 85: /*statement_string,*/
1.5 parser 86: "must return nothing");
1.27 paf 87: return true;
1.5 parser 88: }
1.27 paf 89: bool add_row(SQL_Error& /*error*/) { /* never */ return false; }
1.29 paf 90: bool add_row_cell(SQL_Error& /*error*/, const char* /*str*/, size_t /*length*/) { /* never */ return false; }
1.5 parser 91:
92: };
93: #endif
1.34 paf 94:
95: extern int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders);
96: extern void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders);
97:
1.29 paf 98: static void _sql(Request& r, MethodParams& params) {
99: Value& statement=params.as_junction(0, "statement must be code");
1.1 parser 100:
1.33 paf 101: HashStringValue* bind=0;
102: if(params.count()>1) {
103: Value& voptions=params.as_no_junction(1, "options must be hash, not code");
1.36 paf 104: if(voptions.is_defined() && !voptions.is_string())
1.33 paf 105: if(HashStringValue* options=voptions.get_hash()) {
106: int valid_options=0;
107: if(Value* vbind=options->get(sql_bind_name)) {
108: valid_options++;
109: bind=vbind->get_hash();
110: }
111: if(valid_options!=options->count())
1.38 misha 112: throw Exception(PARSER_RUNTIME,
1.33 paf 113: 0,
114: "called with invalid option");
115: } else
1.38 misha 116: throw Exception(PARSER_RUNTIME,
1.33 paf 117: 0,
118: "options must be hash");
119: }
120:
121: SQL_Driver::Placeholder* placeholders=0;
122: uint placeholders_count=0;
123: if(bind)
124: placeholders_count=marshal_binds(*bind, placeholders);
125:
1.29 paf 126: Temp_lang temp_lang(r, String::L_SQL);
1.18 paf 127: const String& statement_string=r.process_to_string(statement);
1.29 paf 128: const char* statement_cstr=
129: statement_string.cstr(String::L_UNSPECIFIED, r.connection());
130: Void_sql_event_handlers handlers(statement_string);
131: r.connection()->query(
1.33 paf 132: statement_cstr,
133: placeholders_count, placeholders,
1.39 misha 134: 0, SQL_NO_LIMIT,
1.22 paf 135: handlers,
136: statement_string);
1.34 paf 137:
138: if(bind)
139: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.1 parser 140: }
141:
1.32 paf 142: static void _left_right(Request& r, MethodParams& params) {
143: ssize_t sn=params.as_int(0, "n must be int", r);
144: if(sn<0)
1.38 misha 145: throw Exception(PARSER_RUNTIME,
1.32 paf 146: 0,
147: "n(%d) must be >=0", sn);
148:
149: // return nothing
150: }
151:
152: static void _mid(Request& r, MethodParams& params) {
153: ssize_t sbegin=params.as_int(0, "p must be int", r);
154: if(sbegin<0)
1.38 misha 155: throw Exception(PARSER_RUNTIME,
1.32 paf 156: 0,
157: "p(%d) must be >=0", sbegin);
158:
159: if(params.count()>1) {
160: ssize_t sn=params.as_int(1, "n must be int", r);
161: if(sn<0)
1.38 misha 162: throw Exception(PARSER_RUNTIME,
1.32 paf 163: 0,
164: "n(%d) must be >=0", sn);
165: }
166:
167: // return nothing
168: }
169:
1.1 parser 170: // constructor
171:
1.29 paf 172: MVoid::MVoid(): Methoded("void") {
1.23 paf 173: // ^void.length[]
174: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.24 paf 175:
176: // ^void.pos[substr]
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:
1.1 parser 191: // ^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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