Annotation of parser3/src/types/pa_vdouble.h, revision 1.59
1.11 paf 1: /** @file
1.16 paf 2: Parser: @b double parser class decl.
1.11 paf 3:
1.56 moko 4: Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com)
1.32 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6: */
7:
8: #ifndef PA_VDOUBLE_H
9: #define PA_VDOUBLE_H
1.38 paf 10:
1.59 ! moko 11: #define IDENT_PA_VDOUBLE_H "$Id: pa_vdouble.h,v 1.58 2012-05-28 10:33:19 moko Exp $"
1.43 paf 12:
13: // includes
1.1 paf 14:
1.19 paf 15: #include "classes.h"
1.9 paf 16: #include "pa_common.h"
1.5 paf 17: #include "pa_vstateless_object.h"
1.17 paf 18:
1.53 misha 19: // defines
20: #define VDOUBLE_TYPE "double"
21:
1.43 paf 22: // externs
23:
24: extern Methoded* double_class;
1.1 paf 25:
1.11 paf 26: /// value of type 'double'. implemented with @c double
1.43 paf 27: class VDouble: public VStateless_object {
1.1 paf 28: public: // Value
29:
1.53 misha 30: override const char* type() const { return VDOUBLE_TYPE; }
1.43 paf 31: override VStateless_class *get_class() { return double_class; }
1.37 paf 32:
1.48 paf 33: /// VDouble: true
1.50 paf 34: override bool is_evaluated_expr() const { return true; }
1.24 parser 35: /// VDouble: clone
1.57 moko 36: override Value& as_expr_result() { return *new VDouble(fdouble); }
1.1 paf 37:
1.30 paf 38: /** VDouble: fdouble
39: */
1.43 paf 40: override const String* get_string() {
1.35 paf 41: char local_buf[MAX_NUMBER];
1.47 paf 42: size_t length=snprintf(local_buf, MAX_NUMBER, has_frac()? "%g": "%.0f", fdouble);
1.54 misha 43: return new String(strdup(local_buf, length));
1.1 paf 44: }
1.11 paf 45: /// VDouble: fdouble
1.43 paf 46: override double as_double() const { return fdouble; }
1.21 parser 47: /// VDouble: fdouble
1.47 paf 48: override int as_int() const { return get_int(); }
1.11 paf 49: /// VDouble: 0 or !0
1.43 paf 50: override bool as_bool() const { return fdouble!=0; }
1.55 misha 51: /// VInt: json-string
1.59 ! moko 52: override const String* get_json_string(Json_options&) { return get_string(); }
1.1 paf 53:
54: public: // usage
55:
1.43 paf 56: VDouble(double adouble): fdouble(adouble) {}
1.1 paf 57:
1.47 paf 58: int get_int() const { return (int)trunc(fdouble); }
59: double get_double() const { return fdouble; }
60:
1.1 paf 61: void inc(double increment) { fdouble+=increment; }
1.58 moko 62:
1.7 paf 63: void mul(double k) { fdouble*=k; }
1.58 moko 64:
65: void div(double d) {
66: if(d == 0)
67: throw Exception("number.zerodivision", 0, "Division by zero");
68: fdouble/=d;
69: }
70:
71: void mod(int d) {
72: if(d == 0)
73: throw Exception("number.zerodivision", 0, "Modulus by zero");
74: fdouble=((int)fdouble)%d;
75: }
1.47 paf 76:
77: private:
78:
79: bool has_frac() {
1.52 misha 80: return fabs(fdouble-trunc(fdouble))>1e-100;
1.47 paf 81: }
1.1 paf 82:
83: private:
84:
85: double fdouble;
86:
87: };
88:
89: #endif
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