619 lines
14 KiB
C
619 lines
14 KiB
C
/* $Id$*/
|
||
/* Very efficient routines to convert numbers to strings
|
||
* Author: Bob Dalesio wrote cvtFloatToString (called FF_TO_STR)
|
||
* Code is same for cvtDoubleToString
|
||
* Marty Kraimer wrote cvtCharToString,cvtUcharToString
|
||
* cvtShortToString,cvtUshortToString,
|
||
* cvtLongToString, and cvtUlongToString
|
||
* Mark Anderson wrote cvtLongToHexString, cvtLongToOctalString,
|
||
* adopted cvt[Float/Double]ExpString and
|
||
* cvt[Float/Double]CompactString from fToEStr
|
||
* and fixed calls to gcvt
|
||
*
|
||
* Date: 12 January 1993
|
||
*
|
||
* Experimental Physics and Industrial Control System (EPICS)
|
||
*
|
||
* Copyright 1991, the Regents of the University of California,
|
||
* and the University of Chicago Board of Governors.
|
||
*
|
||
* This software was produced under U.S. Government contracts:
|
||
* (W-7405-ENG-36) at the Los Alamos National Laboratory,
|
||
* and (W-31-109-ENG-38) at Argonne National Laboratory.
|
||
*
|
||
* Initial development by:
|
||
* The Controls and Automation Group (AT-8)
|
||
* Ground Test Accelerator
|
||
* Accelerator Technology Division
|
||
* Los Alamos National Laboratory
|
||
*
|
||
* Co-developed with
|
||
* The Controls and Computing Group
|
||
* Accelerator Systems Division
|
||
* Advanced Photon Source
|
||
* Argonne National Laboratory
|
||
*
|
||
* Modification Log:
|
||
* -----------------
|
||
* .01 mrk 12-09-92 Taken from dbAccess and made into library
|
||
* .02 mda 01-12-93 Add cvt[Float/Double]ToExpString,
|
||
* cvt[Float/Double]ToCompactString,
|
||
* cvtLongToHex, cvtLongToOctal routines, fix
|
||
* calls to gcvt, etc.
|
||
* .03 joh 03-30-93 added bit field extract/ insert routines
|
||
* .04 mrk 01-28-94 replaced gcvt by e conversion
|
||
* .05 mrk 05-06-95 changed ExpString routines to just use sprintf
|
||
* It had a bug and performance was not that much
|
||
* better (2-5 times) then sprintf.
|
||
* Also they are not used on vxWorks
|
||
*/
|
||
|
||
#ifdef vxWorks
|
||
#include <vxWorks.h>
|
||
#endif
|
||
|
||
#include <stdlib.h>
|
||
#include <stdio.h>
|
||
#include <limits.h> /* XPG2/XPG3/POSIX.1/FIPS151-1/ANSI-C */
|
||
#include "cvtFast.h"
|
||
|
||
/*
|
||
* This routine converts numbers less than 10,000,000. It defers to f_to_str for
|
||
* numbers requiring more than 8 places of precision. There are only eight decimal
|
||
*/
|
||
static long frac_multiplier[] =
|
||
{1,10,100,1000,10000,100000,1000000,10000000,100000000};
|
||
|
||
int cvtFloatToString(
|
||
float flt_value,
|
||
char *pstr_value,
|
||
unsigned short precision)
|
||
{
|
||
unsigned short got_one,i;
|
||
long whole,iplace,number,fraction,fplace;
|
||
float ftemp;
|
||
char *startAddr;
|
||
|
||
/* can this routine handle this conversion */
|
||
if (precision > 8 || flt_value > 10000000.0 || flt_value < -10000000.0) {
|
||
sprintf(pstr_value,"%12.5e",(double)flt_value);
|
||
return((int)strlen(pstr_value));
|
||
}
|
||
startAddr = pstr_value;
|
||
|
||
/* determine the sign */
|
||
if (flt_value < 0){
|
||
*pstr_value++ = '-';
|
||
flt_value = -flt_value;
|
||
};
|
||
|
||
/* remove the whole number portion */
|
||
whole = (long)flt_value;
|
||
ftemp = flt_value - whole;
|
||
|
||
/* multiplier to convert fractional portion to integer */
|
||
fplace = frac_multiplier[precision];
|
||
fraction = (long)(ftemp * fplace * 10);
|
||
fraction = (fraction + 5) / 10; /* round up */
|
||
|
||
/* determine rounding into the whole number portion */
|
||
if ((fraction / fplace) >= 1){
|
||
whole++;
|
||
fraction -= fplace;
|
||
}
|
||
|
||
/* whole numbers */
|
||
got_one = 0;
|
||
for (iplace = 10000000; iplace >= 1; iplace /= 10){
|
||
if (whole >= iplace){
|
||
got_one = 1;
|
||
number = whole / iplace;
|
||
whole = whole - (number * iplace);
|
||
*pstr_value = number + '0';
|
||
pstr_value++;
|
||
}else if (got_one){
|
||
*pstr_value = '0';
|
||
pstr_value++;
|
||
}
|
||
}
|
||
if (!got_one){
|
||
*pstr_value = '0';
|
||
pstr_value++;
|
||
}
|
||
|
||
/* fraction */
|
||
if (precision > 0){
|
||
/* convert fractional portional to ASCII */
|
||
*pstr_value = '.';
|
||
pstr_value++;
|
||
for (fplace /= 10, i = precision; i > 0; fplace /= 10,i--){
|
||
number = fraction / fplace;
|
||
fraction -= number * fplace;
|
||
*pstr_value = number + '0';
|
||
pstr_value++;
|
||
}
|
||
}
|
||
*pstr_value = 0;
|
||
|
||
return((int)(pstr_value - startAddr));
|
||
}
|
||
|
||
int cvtDoubleToString(
|
||
double flt_value,
|
||
char *pstr_value,
|
||
unsigned short precision)
|
||
{
|
||
unsigned short got_one,i;
|
||
long whole,iplace,number,fraction,fplace;
|
||
double ftemp;
|
||
char *startAddr;
|
||
|
||
/* can this routine handle this conversion */
|
||
if (precision > 8 || flt_value > 10000000.0 || flt_value < -10000000.0) {
|
||
if (precision > 8 || flt_value > 1e16 || flt_value < -1e16) {
|
||
if(precision>17) precision=17;
|
||
sprintf(pstr_value,"%*.*e",precision+7,precision,
|
||
flt_value);
|
||
} else {
|
||
sprintf(pstr_value,"%.0f",flt_value);
|
||
}
|
||
return((int)strlen(pstr_value));
|
||
}
|
||
startAddr = pstr_value;
|
||
|
||
/* determine the sign */
|
||
if (flt_value < 0){
|
||
*pstr_value++ = '-';
|
||
flt_value = -flt_value;
|
||
};
|
||
|
||
/* remove the whole number portion */
|
||
whole = (long)flt_value;
|
||
ftemp = flt_value - whole;
|
||
|
||
/* multiplier to convert fractional portion to integer */
|
||
fplace = frac_multiplier[precision];
|
||
fraction = (long)(ftemp * fplace * 10);
|
||
fraction = (fraction + 5) / 10; /* round up */
|
||
|
||
/* determine rounding into the whole number portion */
|
||
if ((fraction / fplace) >= 1){
|
||
whole++;
|
||
fraction -= fplace;
|
||
}
|
||
|
||
/* whole numbers */
|
||
got_one = 0;
|
||
for (iplace = 10000000; iplace >= 1; iplace /= 10){
|
||
if (whole >= iplace){
|
||
got_one = 1;
|
||
number = whole / iplace;
|
||
whole = whole - (number * iplace);
|
||
*pstr_value = number + '0';
|
||
pstr_value++;
|
||
}else if (got_one){
|
||
*pstr_value = '0';
|
||
pstr_value++;
|
||
}
|
||
}
|
||
if (!got_one){
|
||
*pstr_value = '0';
|
||
pstr_value++;
|
||
}
|
||
|
||
/* fraction */
|
||
if (precision > 0){
|
||
/* convert fractional portional to ASCII */
|
||
*pstr_value = '.';
|
||
pstr_value++;
|
||
for (fplace /= 10, i = precision; i > 0; fplace /= 10,i--){
|
||
number = fraction / fplace;
|
||
fraction -= number * fplace;
|
||
*pstr_value = number + '0';
|
||
pstr_value++;
|
||
}
|
||
}
|
||
*pstr_value = 0;
|
||
|
||
return((int)(pstr_value - startAddr));
|
||
}
|
||
|
||
/*
|
||
* cvtFloatToExpString
|
||
*
|
||
* converts floating point numbers to E-format NULL terminated strings
|
||
*/
|
||
int cvtFloatToExpString(
|
||
float f_value,
|
||
char *pstr_value,
|
||
unsigned short f_precision)
|
||
{
|
||
/*sunos uses char*sprint as function prototype*/
|
||
sprintf(pstr_value,"%.*e",(int)f_precision,(double)f_value);
|
||
return((int)strlen(pstr_value));
|
||
}
|
||
|
||
/*
|
||
* cvtFloatToCompactString
|
||
*
|
||
* Converts floating point numbers to %g format NULL terminated strings,
|
||
* resulting in the most "compact" expression of the value
|
||
* ("f" notation if 10-4 < |value| < 10+4, otherwise "e" notation)
|
||
*/
|
||
int cvtFloatToCompactString(
|
||
float f_value,
|
||
char *pstr_value,
|
||
unsigned short f_precision )
|
||
{
|
||
if ((f_value < 1.e4 && f_value > 1.e-4) ||
|
||
(f_value > -1.e4 && f_value < -1.e-4) || f_value == 0.0) {
|
||
return(cvtFloatToString(f_value,pstr_value,f_precision));
|
||
} else {
|
||
return(cvtFloatToExpString(f_value,pstr_value,f_precision));
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/*
|
||
* cvtDoubleToExpString
|
||
*
|
||
* converts double precision floating point numbers to E-format NULL
|
||
* terminated strings
|
||
*/
|
||
|
||
int cvtDoubleToExpString(
|
||
double f_value,
|
||
char *pstr_value,
|
||
unsigned short f_precision )
|
||
{
|
||
sprintf(pstr_value,"%.*e",(int)f_precision,f_value);
|
||
return((int)strlen(pstr_value));
|
||
}
|
||
|
||
|
||
/*
|
||
* cvtDoubleToCompactString
|
||
*
|
||
* Converts double precision floating point numbers to %g format NULL
|
||
* terminated strings, resulting in the most "compact" expression
|
||
* of the value ("f" notation if 10-4 < |value| < 10+4, otherwise
|
||
* "e" notation)
|
||
*/
|
||
int cvtDoubleToCompactString(
|
||
double f_value,
|
||
char *pstr_value,
|
||
unsigned short f_precision )
|
||
{
|
||
if ((f_value < 1.e4 && f_value > 1.e-4) ||
|
||
(f_value > -1.e4 && f_value < -1.e-4) || f_value == 0.0) {
|
||
return(cvtDoubleToString(f_value,pstr_value,f_precision));
|
||
} else {
|
||
return(cvtDoubleToExpString(f_value,pstr_value,f_precision));
|
||
}
|
||
}
|
||
|
||
/* Convert various integer types to ascii */
|
||
|
||
static char digit_to_ascii[10]={'0','1','2','3','4','5','6','7','8','9'};
|
||
|
||
int cvtCharToString(
|
||
char source,
|
||
char *pdest)
|
||
{
|
||
unsigned char val,temp;
|
||
char digit[3];
|
||
int i,j;
|
||
char *startAddr = pdest;
|
||
|
||
if(source==0) {
|
||
*pdest++ = '0';
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
if(source<0) {
|
||
if(source == CHAR_MIN) {
|
||
sprintf(pdest,"%d",CHAR_MIN);
|
||
return((int)strlen(pdest));
|
||
}
|
||
*pdest++ = '-';
|
||
source = -source;
|
||
}
|
||
val = source;
|
||
for(i=0; val!=0; i++) {
|
||
temp = val/10;
|
||
digit[i] = digit_to_ascii[val - temp*10];
|
||
val = temp;
|
||
}
|
||
for(j=i-1; j>=0; j--) {
|
||
*pdest++ = digit[j];
|
||
}
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
|
||
|
||
int cvtUcharToString(
|
||
unsigned char source,
|
||
char *pdest)
|
||
{
|
||
unsigned char val,temp;
|
||
char digit[3];
|
||
int i,j;
|
||
char *startAddr = pdest;
|
||
|
||
if(source==0) {
|
||
*pdest++ = '0';
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
val = source;
|
||
for(i=0; val!=0; i++) {
|
||
temp = val/10;
|
||
digit[i] = digit_to_ascii[val - temp*10];
|
||
val = temp;
|
||
}
|
||
for(j=i-1; j>=0; j--) {
|
||
*pdest++ = digit[j];
|
||
}
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
|
||
|
||
int cvtShortToString(
|
||
short source,
|
||
char *pdest)
|
||
{
|
||
short val,temp;
|
||
char digit[6];
|
||
int i,j;
|
||
char *startAddr = pdest;
|
||
|
||
if(source==0) {
|
||
*pdest++ = '0';
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
if(source<0) {
|
||
if(source == SHRT_MIN) {
|
||
sprintf(pdest,"%d",SHRT_MIN);
|
||
return((int)(strlen(pdest)));
|
||
}
|
||
*pdest++ = '-';
|
||
source = -source;
|
||
}
|
||
val = source;
|
||
for(i=0; val!=0; i++) {
|
||
temp = val/10;
|
||
digit[i] = digit_to_ascii[val - temp*10];
|
||
val = temp;
|
||
}
|
||
for(j=i-1; j>=0; j--) {
|
||
*pdest++ = digit[j];
|
||
}
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
|
||
|
||
int cvtUshortToString(
|
||
unsigned short source,
|
||
char *pdest)
|
||
{
|
||
unsigned short val,temp;
|
||
char digit[5];
|
||
int i,j;
|
||
char *startAddr = pdest;
|
||
|
||
if(source==0) {
|
||
*pdest++ = '0';
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
val = source;
|
||
for(i=0; val!=0; i++) {
|
||
temp = val/10;
|
||
digit[i] = digit_to_ascii[val - temp*10];
|
||
val = temp;
|
||
}
|
||
for(j=i-1; j>=0; j--) {
|
||
*pdest++ = digit[j];
|
||
}
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
|
||
|
||
int cvtLongToString(
|
||
long source,
|
||
char *pdest)
|
||
{
|
||
long val,temp;
|
||
char digit[11];
|
||
int i,j;
|
||
char *startAddr = pdest;
|
||
|
||
if(source==0) {
|
||
*pdest++ = '0';
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
if(source<0) {
|
||
if(source == LONG_MIN) {
|
||
sprintf(pdest,"%d",LONG_MIN);
|
||
return((int)strlen(pdest));
|
||
}
|
||
*pdest++ = '-';
|
||
source = -source;
|
||
}
|
||
val = source;
|
||
for(i=0; val!=0; i++) {
|
||
temp = val/10;
|
||
digit[i] = digit_to_ascii[val - temp*10];
|
||
val = temp;
|
||
}
|
||
for(j=i-1; j>=0; j--) {
|
||
*pdest++ = digit[j];
|
||
}
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
|
||
|
||
int cvtUlongToString(
|
||
unsigned long source,
|
||
char *pdest)
|
||
{
|
||
unsigned long val,temp;
|
||
char digit[10];
|
||
int i,j;
|
||
char *startAddr = pdest;
|
||
|
||
if(source==0) {
|
||
*pdest++ = '0';
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
val = source;
|
||
for(i=0; val!=0; i++) {
|
||
temp = val/10;
|
||
digit[i] = digit_to_ascii[val - temp*10];
|
||
val = temp;
|
||
}
|
||
for(j=i-1; j>=0; j--) {
|
||
*pdest++ = digit[j];
|
||
}
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
|
||
|
||
/* Convert hex digits to ascii */
|
||
|
||
static char hex_digit_to_ascii[16]={'0','1','2','3','4','5','6','7','8','9',
|
||
'a','b','c','d','e','f'};
|
||
|
||
|
||
int cvtLongToHexString(
|
||
long source,
|
||
char *pdest)
|
||
{
|
||
long val,temp;
|
||
char digit[10];
|
||
int i,j;
|
||
char *startAddr = pdest;
|
||
|
||
if(source==0) {
|
||
*pdest++ = '0';
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
if(source<0) {
|
||
if(source == LONG_MIN) {
|
||
sprintf(pdest,"%x",LONG_MIN);
|
||
return((int)strlen(pdest));
|
||
}
|
||
*pdest++ = '-';
|
||
source = -source;
|
||
}
|
||
val = source;
|
||
for(i=0; val!=0; i++) {
|
||
temp = val/16;
|
||
digit[i] = hex_digit_to_ascii[val - temp*16];
|
||
val = temp;
|
||
}
|
||
for(j=i-1; j>=0; j--) {
|
||
*pdest++ = digit[j];
|
||
}
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
|
||
|
||
int cvtLongToOctalString(
|
||
long source,
|
||
char *pdest)
|
||
{
|
||
long val,temp;
|
||
char digit[16];
|
||
int i,j;
|
||
char *startAddr = pdest;
|
||
|
||
if(source==0) {
|
||
*pdest++ = '0';
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
if(source<0) {
|
||
if(source == LONG_MIN) {
|
||
sprintf(pdest,"%o",LONG_MIN);
|
||
return((int)strlen(pdest));
|
||
}
|
||
*pdest++ = '-';
|
||
source = -source;
|
||
}
|
||
val = source;
|
||
for(i=0; val!=0; i++) {
|
||
temp = val/8;
|
||
/* reuse digit_to_ascii since octal is a subset of decimal */
|
||
digit[i] = digit_to_ascii[val - temp*8];
|
||
val = temp;
|
||
}
|
||
for(j=i-1; j>=0; j--) {
|
||
*pdest++ = digit[j];
|
||
}
|
||
*pdest = 0;
|
||
return((int)(pdest-startAddr));
|
||
}
|
||
|
||
|
||
|
||
|
||
/*
|
||
*
|
||
* cvtBitsToUlong()
|
||
*
|
||
* extract a bit field from the source unsigend long
|
||
*/
|
||
unsigned long cvtBitsToUlong(
|
||
unsigned long src,
|
||
unsigned bitFieldOffset,
|
||
unsigned bitFieldLength)
|
||
{
|
||
unsigned long mask;
|
||
|
||
src = src >> bitFieldOffset;
|
||
|
||
mask = (1<<bitFieldLength)-1;
|
||
|
||
src = src & mask;
|
||
|
||
return src;
|
||
}
|
||
|
||
|
||
|
||
/*
|
||
*
|
||
* cvtUlongToBits()
|
||
*
|
||
* insert a bit field from the source unsigend long
|
||
* into the destination unsigned long
|
||
*/
|
||
unsigned long cvtUlongToBits(
|
||
unsigned long src,
|
||
unsigned long dest,
|
||
unsigned bitFieldOffset,
|
||
unsigned bitFieldLength)
|
||
{
|
||
unsigned long mask;
|
||
|
||
mask = (1<<bitFieldLength)-1;
|
||
mask = mask << bitFieldOffset;
|
||
src = src << bitFieldOffset;
|
||
dest = (dest & ~mask) | (src & mask);
|
||
|
||
return dest;
|
||
}
|