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/** \file itasc/kdl/utilities/utility_io.cpp
* \ingroup itasc
*/
/*****************************************************************************
* Erwin Aertbelien, Div. PMA, Dep. of Mech. Eng., K.U.Leuven
*
* \version
* ORO_Geometry V0.2
*
* \par History
* - $log$
*
* \par Release
* $Name: $
* \todo
* make IO routines more robust against the differences between DOS/UNIX end-of-line style.
****************************************************************************/
#include "utility_io.h"
#include "error.h"
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
namespace KDL {
//
// _functions are private functions
//
void _check_istream(std::istream& is)
{
if ((!is.good())&&(is.eof()) )
{
throw Error_BasicIO_File();
}
}
// Eats until the end of the line
static int _EatUntilEndOfLine( std::istream& is, int* countp=NULL) {
int ch;
int count;
count = 0;
do {
ch = is.get();
count++;
_check_istream(is);
} while (ch!='\n');
if (countp!=NULL) *countp = count;
return ch;
}
// Eats until the end of the comment
static int _EatUntilEndOfComment( std::istream& is, int* countp=NULL) {
int ch;
int count;
count = 0;
int prevch;
ch = 0;
do {
prevch = ch;
ch = is.get();
count++;
_check_istream(is);
if ((prevch=='*')&&(ch=='/')) {
break;
}
} while (true);
if (countp!=NULL) *countp = count;
ch = is.get();
return ch;
}
// Eats space-like characters and comments
// possibly returns the number of space-like characters eaten.
static int _EatSpace( std::istream& is,int* countp=NULL) {
int ch;
int count;
count=-1;
do {
_check_istream(is);
ch = is.get();
count++;
if (ch == '#') {
ch = _EatUntilEndOfLine(is,&count);
}
if (ch == '/') {
ch = is.get();
if (ch == '/') {
ch = _EatUntilEndOfLine(is,&count);
} else if (ch == '*') {
ch = _EatUntilEndOfComment(is,&count);
} else {
is.putback(ch);
ch = '/';
}
}
} while ((ch==' ')||(ch=='\n')||(ch=='\t'));
if (countp!=NULL) *countp = count;
return ch;
}
// Eats whites, returns, tabs and the delim character
// Checks whether delim char. is encountered.
void Eat( std::istream& is, int delim )
{
int ch;
ch=_EatSpace(is);
if (ch != delim) {
throw Error_BasicIO_Exp_Delim();
}
ch=_EatSpace(is);
is.putback(ch);
}
// Eats whites, returns, tabs and the delim character
// Checks whether delim char. is encountered.
// EatEnd does not eat all space-like char's at the end.
void EatEnd( std::istream& is, int delim )
{
int ch;
ch=_EatSpace(is);
if (ch != delim) {
throw Error_BasicIO_Exp_Delim();
}
}
// For each space in descript, this routine eats whites,tabs, and newlines (at least one)
// There should be no consecutive spaces in the description.
// for each letter in descript, its reads the corresponding letter in the output
// the routine is case insensitive.
// Simple routine, enough for our purposes.
// works with ASCII chars
inline char Upper(char ch)
{
/*if (('a'<=ch)&&(ch<='z'))
return (ch-'a'+'A');
else
return ch;
*/
return toupper(ch);
}
void Eat(std::istream& is,const char* descript)
{
// eats whites before word
char ch;
char chdescr;
ch=_EatSpace(is);
is.putback(ch);
const char* p;
p = descript;
while ((*p)!=0) {
chdescr = (char)Upper(*p);
if (chdescr==' ') {
int count=0;
ch=_EatSpace(is,&count);
is.putback(ch);
if (count==0) {
throw Error_BasicIO_Not_A_Space();
}
} else {
ch=(char)is.get();
if (chdescr!=Upper(ch)) {
throw Error_BasicIO_Unexpected();
}
}
p++;
}
}
void EatWord(std::istream& is,const char* delim,char* storage,int maxsize)
{
int ch;
char* p;
int size;
// eat white before word
ch=_EatSpace(is);
p = storage;
size=0;
int count = 0;
while ((count==0)&&(strchr(delim,ch)==NULL)) {
*p = (char) toupper(ch);
++p;
if (size==maxsize) {
throw Error_BasicIO_ToBig();
}
_check_istream(is);
++size;
//ch = is.get();
ch =_EatSpace(is,&count);
}
*p=0;
is.putback(ch);
}
}
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