amath  1.8.5
Simple command line calculator
digits.cpp
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1 /*-
2  * Copyright (c) 2014-2018 Carsten Sonne Larsen <cs@innolan.net>
3  * All rights reserved.
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29 
30 #include "amath.h"
31 #include "amathc.h"
32 #include "digits.h"
33 #include "lib/real.h"
34 #include "lib/ntextd.h"
35 #include "loc/text.h"
36 #include "system/program.h"
37 
38 /**
39  * @brief Constructor used to show number of active digits.
40  *
41  */
44 {
45  show = true;
46  digits = 0;
47 }
48 
49 /**
50  * @brief Constructor used to show number of active digits.
51  *
52  */
53 DigitsStatement::DigitsStatement(unsigned int digits) :
54  StatementNode(), digits(digits)
55 {
56  show = false;
57 }
58 
60 {
61 }
62 
64 {
65  const char* text;
66 
67  if (!show)
68  {
72  text = HELPDIGISETT;
73  }
74  else
75  {
76  text = HELPDIGISHOW;
78  }
79 
80  Number* d = new RealNumber(digits);
81  NumeralSystem* ns = new DecimalSystem(2);
82  const char* dtext = ns->GetText(d);
83  delete d;
84 
87  output->Append(text);
88  output->Append(dtext);
90 
91  delete ns;
92  return output->GetString();
93 }
#define NEWLINE
Definition: amath.h:222
virtual void SetDigits(unsigned int digits)=0
#define HELPDIGISHOW
Definition: text.h:90
void Empty()
Definition: charbuf.cpp:218
char * GetString() const
Definition: charbuf.cpp:306
Base class for all statements in a syntax tree.
Definition: node.h:40
Set number of significant digits to show.
Definition: digits.h:39
void Append(const char *source)
Definition: charbuf.cpp:262
Definition: numb.h:66
virtual const char * GetText(Number *number)=0
RealNumber(unsigned int i)
Definition: real.cpp:76
char * Execute()
Definition: digits.cpp:63
void SetDigits(int digits)
Represent a real number with 15 significant digits.
Definition: real.h:45
DigitsStatement(unsigned int digits)
Constructor used to show number of active digits.
Definition: digits.cpp:53
StatementNode()
Definition: node.cpp:34
virtual unsigned int GetDigits()=0
int StrLen(const char *string)
Get the length of a null terminated string.
Definition: strlen.c:34
Base class for all numeral systems.
Definition: ntext.h:49
CharBuffer * output
Definition: nodes.h:85
DecimalSystem(unsigned int digits)
Definition: ntextd.cpp:66
#define HELPDIGISETT
Definition: text.h:89
class NumeralSystem * Input
Definition: program.h:75
void EnsureSize(unsigned int size)
Ensure a memory block of specified size is allocated.
Definition: charbuf.cpp:114
DigitsStatement()
Constructor used to show number of active digits.
Definition: digits.cpp:42
unsigned int digits
Definition: digits.h:49
class PreferencesBase * Preferences
Definition: program.h:73
class NumeralSystem * Output
Definition: program.h:76