CPPValue Class Reference

A class representing a C-preprocessor value. More...

#include <src/cppvalue.h>

Public Types
enum	Type { Int , Float }

Public Member Functions
	CPPValue (char c)
	CPPValue (long val=0)
	CPPValue (double val)
	operator double () const
	operator long () const
bool	isInt () const
void	print () const

Static Public Member Functions
static CPPValue	parseOctal (const std::string &token)
static CPPValue	parseDecimal (const std::string &token)
static CPPValue	parseHexadecimal (const std::string &token)
static CPPValue	parseBinary (const std::string &token)
static CPPValue	parseCharacter (const std::string &token)
static CPPValue	parseFloat (const std::string &token)

Private Attributes
Type	type
union {
double   d
long   l
}	v

Detailed Description

A class representing a C-preprocessor value.

Definition at line 23 of file cppvalue.h.

Member Enumeration Documentation

Type

enum CPPValue::Type

Enumerator
Int
Float

Definition at line 26 of file cppvalue.h.

{ Int, Float };

Constructor & Destructor Documentation

CPPValue() [1/3]

CPPValue::CPPValue ( char c )

inlineexplicit

Definition at line 28 of file cppvalue.h.

: type(Int) { v.l = c; }

References Int, type, and v.

Referenced by parseBinary(), parseCharacter(), parseDecimal(), parseFloat(), parseHexadecimal(), and parseOctal().

CPPValue() [2/3]

CPPValue::CPPValue ( long val = 0 )

inlineexplicit

Definition at line 29 of file cppvalue.h.

: type(Int) { v.l = val; }

References Int, type, and v.

CPPValue() [3/3]

CPPValue::CPPValue ( double val )

inlineexplicit

Definition at line 30 of file cppvalue.h.

: type(Float) { v.d = val; }

References Float, type, and v.

Member Function Documentation

isInt()

bool CPPValue::isInt ( ) const

inline

Definition at line 35 of file cppvalue.h.

{ return type == Int; }

References Int, and type.

operator double()

CPPValue::operator double ( ) const

inline

Definition at line 32 of file cppvalue.h.

{ return type==Int ? static_cast<double>(v.l) : v.d; }

References Int, type, and v.

operator long()

CPPValue::operator long ( ) const

inline

Definition at line 33 of file cppvalue.h.

{ return type==Int ? v.l : static_cast<long>(v.d);   }

References Int, type, and v.

parseBinary()

CPPValue CPPValue::parseBinary ( const std::string & token )

static

Definition at line 54 of file cppvalue.cpp.

{
  long val = 0;
  for (const char *p = token.c_str(); *p != 0; p++)
  {
    if (*p >= '0' && *p <= '1') val = val * 2 + *p - '0';
  }
  return CPPValue(val);
}

References CPPValue().

parseCharacter()

CPPValue CPPValue::parseCharacter ( const std::string & token )

static

Definition at line 64 of file cppvalue.cpp.

{
  if (token[1]=='\\')
  {
    switch(token[2])
    {
      case 'n':  return CPPValue('\n');
      case 't':  return CPPValue('\t');
      case 'v':  return CPPValue('\v');
      case 'b':  return CPPValue('\b');
      case 'r':  return CPPValue('\r');
      case 'f':  return CPPValue('\f');
      case 'a':  return CPPValue('\a');
      case '\\': return CPPValue('\\');
      case '?':  return CPPValue('\?');
      case '\'': return CPPValue('\'');
      case '"':  return CPPValue('"');
      case '0':  // fall through
      case '1':  // fall through
      case '2':  // fall through
      case '3':  // fall through
      case '4':  // fall through
      case '5':  // fall through
      case '6':  // fall through
      case '7':  // fall through
                 return parseOctal(token);
      case 'x':
      case 'X':  return parseHexadecimal(token);
      default:   printf("Invalid escape sequence %s found!\n",token.c_str());
                 return CPPValue(0L);
    }
  }
  return CPPValue(token[1]);
}

References CPPValue(), parseHexadecimal(), and parseOctal().

parseDecimal()

CPPValue CPPValue::parseDecimal ( const std::string & token )

static

Definition at line 31 of file cppvalue.cpp.

{
  long val = 0;
  for (const char *p = token.c_str(); *p != 0; p++)
  {
    if (*p >= '0' && *p <= '9') val = val * 10 + *p - '0';
  }
  return CPPValue(val);
}

References CPPValue().

parseFloat()

CPPValue CPPValue::parseFloat ( const std::string & token )

static

Definition at line 99 of file cppvalue.cpp.

{
  return CPPValue(std::stod(token));
}

References CPPValue().

parseHexadecimal()

CPPValue CPPValue::parseHexadecimal ( const std::string & token )

static

Definition at line 41 of file cppvalue.cpp.

{
  long val = 0;
  for (const char *p = token.c_str(); *p != 0; p++)
  {
    if      (*p >= '0' && *p <= '9') val = val * 16 + *p - '0';
    else if (*p >= 'a' && *p <= 'f') val = val * 16 + *p - 'a' + 10;
    else if (*p >= 'A' && *p <= 'F') val = val * 16 + *p - 'A' + 10;
  }
  //printf("parseHexadecimal %s->%x\n",qPrint(token),val);
  return CPPValue(val);
}

References CPPValue().

Referenced by parseCharacter().

parseOctal()

CPPValue CPPValue::parseOctal ( const std::string & token )

static

Definition at line 21 of file cppvalue.cpp.

{
  long val = 0;
  for (const char *p = token.c_str(); *p != 0; p++)
  {
    if (*p >= '0' && *p <= '7') val = val * 8 + *p - '0';
  }
  return CPPValue(val);
}

References CPPValue().

Referenced by parseCharacter().

print()

void CPPValue::print ( ) const

inline

Definition at line 37 of file cppvalue.h.

    {
      if (type==Int)
        printf("(%ld)\n",v.l);
      else
        printf("(%f)\n",v.d);
    }

References Int, type, and v.

Member Data Documentation

d

double CPPValue::d

Definition at line 54 of file cppvalue.h.

l

long CPPValue::l

Definition at line 55 of file cppvalue.h.

type

Type CPPValue::type

private

Definition at line 52 of file cppvalue.h.

Referenced by CPPValue(), CPPValue(), CPPValue(), isInt(), operator double(), operator long(), and print().

[union]

union { ... } CPPValue::v

Referenced by CPPValue(), CPPValue(), CPPValue(), operator double(), operator long(), and print().

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The documentation for this class was generated from the following files:

• src/cppvalue.h
• src/cppvalue.cpp