/ray/src/lib/lex/fastval2str.cc File Reference

#include "fastval2str.h"
#include <lib/numerics/num_math.h>

Include dependency graph for fastval2str.cc:

Go to the source code of this file.

Functions

template<typename T> char * _UInt2String (char *dest, T val, char base)

char * FastInt2String (char *dest, uint8 val, char base)

char * FastInt2String (char *dest, uint16 val, char base)

char * FastInt2String (char *dest, uint32 val, char base)

char * FastInt2String (char *dest, uint64 val, char base)

template<typename T, typename UT> char * _SInt2String (char *dest, T val, char base)

char * FastInt2String (char *dest, int8 val, char base)

char * FastInt2String (char *dest, int16 val, char base)

char * FastInt2String (char *dest, int32 val, char base)

char * FastInt2String (char *dest, int64 val, char base)

template<typename T> char * _Float2String (char *dest, T val)

char * FastFloat2String (char *dest, flt val)

char * FastFloat2String (char *dest, dbl val)

Variables

const char * _hexdig = "YZ0123456789abcdefGH"

const char * hexdig = _hexdig+2

Function Documentation

template<typename T>

char* _Float2String ( char * dest,

T val

) [static]

Definition at line 147 of file fastval2str.cc.
References NUM::frexp(), and hexdig.

template<typename T, typename UT>

char* _SInt2String ( char * dest,

T val,

char base

) [inline, static]

Definition at line 123 of file fastval2str.cc.

template<typename T>

char* _UInt2String ( char * dest,

T val,

char base

) [static]

Definition at line 31 of file fastval2str.cc.
References Assert, hexdig, and uchar.

char* FastFloat2String ( char * dest,

dbl val

)

Definition at line 192 of file fastval2str.cc.
References dbl.
Referenced by VM::InstructionStorage::DumpInstruction().

char* FastFloat2String ( char * dest,

flt val

)

Author:
Wolfgang Wieser ] wwieser (a) gmx <*> de [
The floating point value will be emitted as a hexadecimal floating point value representing the complete prescision of a 4 or 8 byte floating point value, respectively. Trailing zeros are omitted.
NOTE that this is a dangerous function (dangerous for the sake of speed). The caller has to make sure that dest is long enough to hold the string. Fortunately, the limit is not very hard to predict: it is

4+13+2+3 = 22 chars for a flt.

4+6+2+2 = 14 chars for a dbl.

The result looks like "-0x.11111p-22".
Definition at line 190 of file fastval2str.cc.

char* FastInt2String ( char * dest,

int64 val,

char base

)

Definition at line 143 of file fastval2str.cc.

char* FastInt2String ( char * dest,

int32 val,

char base

)

Definition at line 141 of file fastval2str.cc.

char* FastInt2String ( char * dest,

int16 val,

char base

)

Definition at line 139 of file fastval2str.cc.

char* FastInt2String ( char * dest,

int8 val,

char base = 16

)

Author:
Wolfgang Wieser ] wwieser (a) gmx <*> de [
These functions will convert the intever val to a string written into *dest. The string will NOT be NUL-terminated and the returned pointer points to the location where to go on (e.g. by terminating with NUL).
The integer can be written in a base of 8, 10 or 16. For base 8, a zero (0) is prepended, for base 16, 0x is prepended.
NOTE that this is a dangerous function (dangerous for the sake of speed). The caller has to make sure that dest is long enough to hold the string. Fortunately, the limit is not very hard to predict; here is a table:

Integer octal decimal hex Integer octal decimal hex

uint8 4 3 4 int8 5 4 5

uint16 7 5 6 int16 8 6 7

uint32 12 10 10 int32 13 11 11

uint64 23 20 18 int64 24 20 19

Generally, the space consumption is

ceil(sizeof(T)*8/log2(base)) for the digits

+1 for a sign

+1 for octal and +2 for hexadecimal prefix

THESE FUNCTIONS ARE FAST BUT DANGEROUS. USE WITH CARE. IF IN DOUBT, USE SOMETHING ELSE. THEY ARE PRIMARILY FOR INTERNAL USE BY HIGHER-LEVEL OUTPUT ROUTINES.
Definition at line 137 of file fastval2str.cc.

char* FastInt2String ( char * dest,

uint64 val,

char base

)

Definition at line 119 of file fastval2str.cc.

char* FastInt2String ( char * dest,

uint32 val,

char base

)

Definition at line 117 of file fastval2str.cc.

char* FastInt2String ( char * dest,

uint16 val,

char base

)

Definition at line 115 of file fastval2str.cc.

char* FastInt2String ( char * dest,

uint8 val,

char base

)

Definition at line 113 of file fastval2str.cc.

Variable Documentation

const char* _hexdig = "YZ0123456789abcdefGH" [static]

Definition at line 23 of file fastval2str.cc.

const char* hexdig = _hexdig+2 [static]

Definition at line 24 of file fastval2str.cc.
Referenced by _Float2String(), and _UInt2String().

Generated on Sat Feb 19 22:33:59 2005 for Ray by

1.3.5


Functions
template<typename T> char *	_UInt2String (char *dest, T val, char base)
char *	FastInt2String (char *dest, uint8 val, char base)
char *	FastInt2String (char *dest, uint16 val, char base)
char *	FastInt2String (char *dest, uint32 val, char base)
char *	FastInt2String (char *dest, uint64 val, char base)
template<typename T, typename UT> char *	_SInt2String (char *dest, T val, char base)
char *	FastInt2String (char *dest, int8 val, char base)
char *	FastInt2String (char *dest, int16 val, char base)
char *	FastInt2String (char *dest, int32 val, char base)
char *	FastInt2String (char *dest, int64 val, char base)
template<typename T> char *	_Float2String (char *dest, T val)
char *	FastFloat2String (char *dest, flt val)
char *	FastFloat2String (char *dest, dbl val)
Variables
const char *	_hexdig = "YZ0123456789abcdefGH"
const char *	hexdig = _hexdig+2