ZealOS/src/Kernel/StrB.CC

U8 *Tabs2Spaces(U8 *src)
{//MAlloc str with tabs to spaces.
	I64 ch,i,j,l=StrLen(src)<<1+2,col=0;
	U8 *dst=MAlloc(l),*tmp;
	while (ch=*src++) {
		if (ch=='\t') {
			j=(col+8) & ~7;
			for (i=col;i<j;i++) {
				dst[i]=CH_SPACE;
				if (i>=l-2) {
					tmp=MAlloc(l<<1);
					MemCopy(tmp,dst,i+1);
					Free(dst);
					l<<=1;
					dst=tmp;
				}
			}
			col=j;
		} else {
			dst[col]=ch;
			if (col>=l-2) {
				tmp=MAlloc(l<<1);
				MemCopy(tmp,dst,col+1);
				Free(dst);
				l<<=1;
				dst=tmp;
			}
			col++;
		}
	}
	dst[col]=0;
	return dst;
}

U8 *ScaleIndent(U8 *src,F64 indent_scale_factor)
{//MAlloced str.	8*0.25-->2 or 8*2.0-->16
	I64 ch,i,col=0;
	U8 *dst,*dst2;
	while (ch=*src++) {
		if (ch=='\t')
			col=(col+8) & -0x8;
		else if (ch==CH_SPACE)
			col++;
		else
			break;
	}
	src--;
	col=Round(indent_scale_factor*col);
	dst=dst2=MAlloc(StrLen(src)+col/8+col&7+1);
	for (i=col/8;i>0;i--)
		*dst2++='\t';
	for (i=col&7;i>0;i--)
		*dst2++=CH_SPACE;
	StrCopy(dst2,src);
	return dst;
}

U8 *MStrUtil(U8 *src,I64 flags,F64 indent_scale_factor=0)
{//MAlloc $LK,"StrUtil",A="MN:StrUtil"$().
	U8 *dst=StrNew(src),*dst2,*tmp;
	StrUtil(dst,flags);
	if (flags & SUF_T2S) {
		tmp=Tabs2Spaces(dst);
		Free(dst);
		dst=tmp;
	}
	if (flags & SUF_SCALE_INDENT)
		dst2=ScaleIndent(dst,indent_scale_factor);
	else
		dst2=StrNew(dst); //Shorten to just right size.
	Free(dst);
	return dst2;
}

U0 GetOutOfDollar()
{//If a $$ has been printed, print another $$ to exit mode.
	CDoc *doc;
	if (IsRaw) {
		if (text.raw_flags&RAWF_IN_DOLLAR)
			'$$';
	} else {
		if (fp_doc_put && (doc=(*fp_doc_put)(Fs)) && doc->flags&DOCF_IN_DOLLAR)
			'$$';
	}
}

Bool YorN()
{//Wait for user to answer Y or N.
	I64 ch;
	"(y or n)? ";
	while (TRUE) {
		ch=ToUpper(CharGet(,FALSE));
		if (ch=='Y') {
			"$$PT$$YES$$FG$$\n";
			return TRUE;
		} else if (ch=='N') {
			"$$PT$$NO$$FG$$\n";
			return FALSE;
		}
	}
}

I64 PressAKey()
{//Print "Press a key" and wait for non-zero $LK,"ASCII",A="MN:CH_CTRLA"$ key.
	"$$BK,1$$PRESS A KEY$$BK,0$$\n";
	return CharGet(,FALSE);
}

Bool AreYouSure()
{//Print "Are you sure" and waits for Y or N.
	"ARE YOU SURE ";
	return YorN;
}

U0 Help()
{//Debug help or master help index file.
	if (IsDebugMode)
		DebugHelp;
	else
		PopUp("Type(\"::/Doc/HelpIndex.DD\");DocTop;View;");
}

U0 FlagsScan(U8 *_dst_flags,U8 *list,U8 *src)
{/*More than 64 flags. Flags passed by ref.

Examples:
$LK,"FlagsScan",A="FF:::/Zenith/Utils/Find.CC,FlagsScan:2"$(&fuf_flags,Define("ST_FILE_UTIL_FLAGS"),fu_flags);

I64 flags=0;
FlagsScan(&flags,"R\0L\0Dump\0Scan\0","+Dump-R"); //Sets Bit#2, Clears Bit#0.
*/
	I64 i;
	U8 *buf,*ptr;
	if (src) {
		buf=MAlloc(StrLen(src)+1);
		while (*src) {
			while (*src && *src!='+' && *src!='-')
				src++;
			if (*src=='+') {
				src++;
				if (*src) {
					ptr=buf;
					while (*src && *src!='+' && *src!='-' && *src!=CH_SPACE)
						*ptr++=*src++;
					*ptr=0;
					i=ListMatch(buf,list);
					if (i>=0)
						LBts(_dst_flags,i);
					else {
						Free(buf);
						throw('ScanFlag');
					}
				}
			} else if (*src=='-') {
				src++;
				if (*src) {
					ptr=buf;
					while (*src && *src!='+' && *src!='-' && *src!=CH_SPACE)
						*ptr++=*src++;
					*ptr=0;
					i=ListMatch(buf,list);
					if (i>=0)
						LBtr(_dst_flags,i);
					else {
						Free(buf);
						throw('ScanFlag');
					}
				}
			}
		}
		Free(buf);
	}
}

U8 *FlagsStrPrint(U8 *dst, U8 *list, I64 flags, Bool print_all=FALSE, I64 print_all_length=0)
{//Only 64 flags. Flags passed by value. print_all will print false flags using `-`.
//Specify print_all_length (list length) if print_all is true.
	I64 i = 0;
	*dst = 0;
	if (!print_all_length)
		print_all_length =  64;
	while (i < print_all_length)
	{
		if (Bt(&flags, i))
			CatPrint(dst, "+%z", i, list);
		else if (print_all)
			CatPrint(dst, "-%z", i, list);
		i++;
	}
	return dst;
}