// This file is a part of the Framsticks GDK.
// Copyright (C) 1999-2014  Maciej Komosinski and Szymon Ulatowski.  See LICENSE.txt for details.
// Refer to http://www.framsticks.com/ for further information.

#include <stdio.h>
#include <ctype.h>

#include "param.h"
#include <frams/util/extvalue.h>
#include "common/framsg.h"
#include <frams/util/sstringutils.h>

//#define SAVE_ALL_NAMES
#define SAVE_SELECTED_NAMES
#define WARN_MISSING_NAME

char MakeCodeGuardHappy;

ParamEntry empty_paramtab[] =
{ { "Empty", 1, 0, "Empty", }, { 0, 0, 0, }, };

static void czytdotyldy(VirtFILE *f, SString &s)
{
	SString temp;
	int z;
	char last_char = 0;
	while ((z = fgetc(f)) != EOF)
	{
		if (z == '~')
			if (last_char != '\\') break;
		last_char = (char)z;
		temp += last_char;
	}
	s = temp;
}

static const char *strchrlimit(const char *t, int ch, const char *limit)
{
	int n = (int)(limit - t);
	for (; (n > 0) && *t; t++, n--)
		if (*t == ch) return t;
	return 0;
}

void ParamInterface::copyFrom(ParamInterface *src)
{
	int n = getPropCount();
	ExtValue v;
	int j;
	for (int i = 0; i < n; i++)
		if ((!(flags(i)&PARAM_READONLY))
			&& (*type(i) != 'p'))
		{
			j = src->findId(id(i));
			if (j < 0) continue;
			src->get(j, v);
			set(i, v);
		}
}

void ParamInterface::quickCopyFrom(ParamInterface *src)
{
	int n = getPropCount();
	ExtValue v;
	for (int i = 0; i < n; i++)
		if ((!(flags(i)&PARAM_READONLY))
			&& (*type(i) != 'p'))
		{
			src->get(i, v);
			set(i, v);
		}
}

int ParamInterface::getMinMax(int prop, paInt& minumum, paInt& maximum, paInt &def)
{
	const char* t = type(prop) + 1;
	while (*t) if (*t == ' ') break; else t++;
	return sscanf(t, PA_INT_SCANF " " PA_INT_SCANF " " PA_INT_SCANF, &minumum, &maximum, &def);
}

int ParamInterface::getMinMax(int prop, double& minumum, double& maximum, double& def)
{
	const char* t = type(prop) + 1;
	while (*t) if (*t == ' ') break; else t++;
	return sscanf(t, "%lg %lg %lg", &minumum, &maximum, &def);
}

void ParamInterface::setDefault(bool numericonly)
{
	int n = getPropCount();
	for (int i = 0; i < n; i++)
		setDefault(i, numericonly);
}

void ParamInterface::setMin()
{
	int n = getPropCount();
	for (int i = 0; i < n; i++)
		setMin(i);
}

void ParamInterface::setMax()
{
	int n = getPropCount();
	for (int i = 0; i < n; i++)
		setMax(i);
}

void ParamInterface::setDefault(int i, bool numericonly)
{
	const char *t = type(i);
	switch (*t)
	{
	case 'f':
	{
		double a = 0, b = 0, c = 0;
		if (getMinMax(i, a, b, c) < 3) c = a;
		setDouble(i, c);
	}
		break;
	case 'd':
	{
		paInt a = 0, b = 0, c = 0;
		if (getMinMax(i, a, b, c) < 3) c = a;
		setInt(i, c);
	}
		break;
	default: if (!numericonly) set(i, "");
	}
}

void ParamInterface::setMin(int i)
{
	const char *t = type(i);
	switch (*t)
	{
	case 'f':
	{
		double a = 0, b = 0, c = 0;
		getMinMax(i, a, b, c);
		setDouble(i, a);
	}
		break;
	case 'd':
	{
		paInt a = 0, b = 0, c = 0;
		getMinMax(i, a, b, c);
		setInt(i, a);
	}
		break;
	default: set(i, "");
	}
}

void ParamInterface::setMax(int i)
{
	const char *t = type(i);
	switch (*t)
	{
	case 'f':
	{
		double a = 0, b = 0, c = 0;
		getMinMax(i, a, b, c);
		setDouble(i, b);
	}
		break;
	case 'd':
	{
		paInt a = 0, b = 0, c = 0;
		getMinMax(i, a, b, c);
		setInt(i, b);
	}
		break;
	default: set(i, "");
	}
}

SString ParamInterface::getStringById(const char*prop)
{int i=findId(prop); if (i>=0) return getString(i); else return SString();}
paInt ParamInterface::getIntById(const char*prop)
{int i=findId(prop); if (i>=0) return getInt(i); else return 0;}
double ParamInterface::getDoubleById(const char*prop)
{int i=findId(prop); if (i>=0) return getDouble(i); else return 0;}
ExtObject ParamInterface::getObjectById(const char*prop)
{int i=findId(prop); if (i>=0) return getObject(i); else return ExtObject();}
ExtValue ParamInterface::getExtValueById(const char*prop)
{int i=findId(prop); if (i>=0) return getExtValue(i); else return ExtValue();}

int ParamInterface::setIntById(const char* prop,paInt v)
{int i=findId(prop); if (i>=0) return setInt(i,v); else return PSET_NOPROPERTY;}
int ParamInterface::setDoubleById(const char* prop,double v)
{int i=findId(prop); if (i>=0) return setDouble(i,v); else return PSET_NOPROPERTY;}
int ParamInterface::setStringById(const char* prop,const SString &v)
{int i=findId(prop); if (i>=0) return setString(i,v); else return PSET_NOPROPERTY;}
int ParamInterface::setObjectById(const char* prop,const ExtObject &v)
{int i=findId(prop); if (i>=0) return setObject(i,v); else return PSET_NOPROPERTY;}
int ParamInterface::setExtValueById(const char* prop,const ExtValue &v)
{int i=findId(prop); if (i>=0) return setExtValue(i,v); else return PSET_NOPROPERTY;}
int ParamInterface::setById(const char* prop,const ExtValue &v)
{int i=findId(prop); if (i>=0) return set(i,v); else return PSET_NOPROPERTY;}

int ParamInterface::save(VirtFILE* f, const char* altname, bool force)
{
	const char *p;
	SString ws;
	int err = 0, i;
	bool withname = false;
	if ((altname == NULL) || (altname[0] != 0))
	{
		err |= (fputs(altname ? altname : getName(), f) == EOF);
		err |= (fputs(":\n", f) == EOF);
		withname = true;
	}
	for (i = 0; p = id(i); i++)
		err |= saveprop(f, i, p, force);
	if (withname)
		err |= (fputs("\n", f) == EOF);
	return err;
}

const char* ParamInterface::SERIALIZATION_PREFIX = "@Serialized:";

int ParamInterface::saveprop(VirtFILE* f, int i, const char* p, bool force)
{
	if ((flags(i)&PARAM_DONTSAVE) && (!force)) return 0;
	const char *typ = type(i);
	if ((*typ == 'p') || (*typ == 'o')) return 0;

	const char *t, *w;
	SString ws;
	int err = 0, cr;

	err |= (fputs(p, f) == EOF); fputc(':', f);
	cr = 0;
	if (*typ == 'x')
	{
		ExtValue ex;
		get(i, ex);
		ws = SString(SERIALIZATION_PREFIX) + ex.serialize();
	}
	else
		ws = get(i);
	quoteTilde(ws);
	w = ws;
	if (ws.len() > 50) cr = 1;
	else for (t = w; *t; t++) if ((*t == 10) || (*t == 13)) { cr = 1; break; }
	if (cr) fputs("~\n", f);
	err |= (fputs(w, f) == EOF);
	err |= (fputs(cr ? "~\n" : "\n", f) == EOF);
	return err;
}


int SimpleAbstractParam::isequal(int i, void* defdata)
{ // defdata->member == object->member ?
	void *backup = object;
	switch (type(i)[0])
	{
	case 'd':
	{
		select(defdata);
		paInt x = getInt(i);
		select(backup);
		return x == getInt(i);
	}
	case 'f':
	{
		select(defdata);
		double x = getDouble(i);
		select(backup);
		return x == getDouble(i);
	}
	case 's':
	{
		select(defdata);
		SString x = getString(i);
		select(backup);
		return x == getString(i);
	}
	}
	return 1;
}

void SimpleAbstractParam::save2(SString& f, void *defdata, bool addcr, bool all_names)
{ // defdata!=NULL -> does not save default values
	const char *p;
	int i;
	int needlabel = 0;
	int first = 1;
	SString val;
	SString t;
	int fl;
	// t+=SString(getName()); t+=':';
	for (i = 0; p = id(i); i++)
		if (!((fl = flags(i))&PARAM_DONTSAVE))
		{
			if (defdata && isequal(i, defdata))
				needlabel = 1;
			else
			{
				if (!first) t += ", ";
#ifndef SAVE_ALL_NAMES
#ifdef SAVE_SELECTED_NAMES
				if (needlabel || all_names || !(fl & PARAM_CANOMITNAME))
#else
				if (needlabel)
#endif
#endif
				{
					t += p; t += "="; needlabel = 0;
				}
				if (type(i)[0] == 's')
				{ // string - special case
					SString str = getString(i);
					if (strContainsOneOf(str, ", \\\n\r\t\""))
					{
						t += "\"";
						sstringQuote(str);
						t += str;
						t += "\"";
					}
					else
						t += str;
				}
				else
					t += get(i);
				first = 0;
			}
		}
	if (addcr)
		t += "\n";
	f += t;
}

int ParamInterface::load(VirtFILE* f)
{
	SString buf;
	int i;
	const char *p, *p0;
	int p_len;
	bool loaded;
	int fields_loaded = 0;
	while (loadSStringLine(f, buf))
	{
		const char* t = (const char*)buf;
		p0 = t; while ((*p0 == ' ') || (*p0 == '\t')) p0++;
		if (!*p0) break;
		p = strchr(p0, ':'); if (!p) continue;
		p_len = (int)(p - p0);
		loaded = false;
		if (p_len && ((i = findIdn(p0, p_len)) >= 0) && (!(flags(i)&PARAM_DONTLOAD)))
		{
			if (p0[p_len + 1] == '~')
			{
				SString s;
				czytdotyldy(f, s);
				removeCR(s);
				int ch; while ((ch = fgetc(f)) != EOF) if (ch == '\n') break;
				unquoteTilde(s);
				set(i, (const char*)s);
			}
			else
			{
				set(i, p0 + p_len + 1);
			}
			fields_loaded++;
			loaded = true;
		}
		if ((!loaded) && (p0[p_len + 1] == '~'))
		{ // eat unrecognized multiline field
			SString s;
			czytdotyldy(f, s);
			int ch; while ((ch = fgetc(f)) != EOF) if (ch == '\n') break;
		}
	}
	return fields_loaded;
}


/*
SString SimpleAbstractParam::getString(int i)
{
char *t;
switch (*(t=type(i)))
	{
	case 'd':
	{
	for (i=atol(get(i));i>=0;i--) if (t) t=strchr(t+1,'~');
	if (t)
		{
		t++;
		char *t2=strchr(t,'~');
		if (!t2) t2=t+strlen(t);
		SString str;
		strncpy(str.directWrite(t2-t),t,t2-t);
		str.endWrite(t2-t);
		return str;
		}
	}
	}
return get(i);
}
*/

int ParamInterface::findId(const char* n)
{
	int i; const char *p;
	for (i = 0; p = id(i); i++) if (!strcmp(n, p)) return i;
	return -1;
}

int ParamInterface::findIdn(const char* naz, int n)
{
	int i; const char *p;
	for (i = 0; p = id(i); i++) if ((!strncmp(naz, p, n)) && (!p[n])) return i;
	return -1;
}

void ParamInterface::get(int i, ExtValue &ret)
{
	switch (type(i)[0])
	{
	case 'd':	ret.setInt(getInt(i)); break;
	case 'f':	ret.setDouble(getDouble(i)); break;
	case 's':	ret.setString(getString(i)); break;
	case 'o':	ret.setObject(getObject(i)); break;
	case 'x':	ret = getExtValue(i); break;
	default: FMprintf("ParamInterface", "get", FMLV_ERROR, "'%s.%s' is not a field", getName(), id(i));
	}
}

static bool stringIsNumeric(const char* str)
{//   /-?.?[0-9]+/
	if (!str) return false;
	if (*str == '-') str++;
	if (*str == '.') str++;
	return isdigit(*str) != 0;
}

int ParamInterface::setInt(int i, const char* str)
{
	if (!stringIsNumeric(str))
	{
		paInt a, b, c;
		if (getMinMax(i, a, b, c) >= 3)
			return setInt(i, c);
		else
			return setInt(i, (paInt)0);
	}
	else
		return setInt(i, ExtValue::getInt(str));
}

int ParamInterface::setDouble(int i, const char* str)
{
	if (!stringIsNumeric(str))
	{
		double a, b, c;
		if (getMinMax(i, a, b, c) >= 3)
			return setDouble(i, c);
		else
			return setDouble(i, (double)0);
	}
	else
		return setDouble(i, ExtValue::getDouble(str));
}

int ParamInterface::set(int i, const ExtValue &v)
{
	switch (type(i)[0])
	{
	case 'd':
		if ((v.type == TInt) || (v.type == TDouble)) return setInt(i, v.getInt());
		else
		{
			if (v.type == TObj)
				FMprintf("ParamInterface", "set", FMLV_WARN, "Getting integer value from object reference (%s)", (const char*)v.getString());
			return setInt(i, (const char*)v.getString());
		}
	case 'f':
		if ((v.type == TInt) || (v.type == TDouble)) return setDouble(i, v.getDouble());
		else
		{
			if (v.type == TObj)
				FMprintf("ParamInterface", "set", FMLV_WARN, "Getting floating point value from object reference (%s)", (const char*)v.getString());
			return setDouble(i, (const char*)v.getString());
		}
	case 's': { SString t = v.getString(); return setString(i, t); }
	case 'o': return setObject(i, v.getObject());
	case 'x': return setExtValue(i, v);
	default: FMprintf("ParamInterface", "set", FMLV_ERROR, "'%s.%s' is not a field", getName(), id(i));
	}
	return 0;
}

int ParamInterface::set(int i, const char *v)
{
	switch (type(i)[0])
	{
	case 'd': return setInt(i, v);
	case 'f': return setDouble(i, v);
	case 's': { SString t(v); return setString(i, t); }
	case 'x':
	{
		ExtValue e;
		const char* after;
		if (!strncmp(v, SERIALIZATION_PREFIX, strlen(SERIALIZATION_PREFIX)))
		{
			after = e.deserialize(v + strlen(SERIALIZATION_PREFIX));
			if ((after == NULL) || (*after))
				FMprintf("ParamInterface", "set", FMLV_WARN, "serialization format mismatch in %s.%s", (getName() ? getName() : "<Unknown>"), id(i));
		}
		else if ((after = e.parseNumber(v)) && (*after == 0)) //consumed the whole string
		{
			//OK!
		}
		else
		{
			e.setString(SString(v));
		}
		return setExtValue(i, e);
	}
	}
	return 0;
}

SString ParamInterface::getText(int i)
{
	const char *t;
	if ((*(t = type(i))) == 'd')
	{
		for (int j = getInt(i); j >= 0; j--) if (t) t = strchr(t + 1, '~');
		if (t)
		{
			t++;
			const char *t2 = strchr(t, '~');
			if (!t2) t2 = t + strlen(t);
			return SString(t, (int)(t2 - t));
		}
	}
	return get(i);
}

SString ParamInterface::get(int i)
{
	switch (type(i)[0])
	{
	case 'd': return SString::valueOf(getInt(i));
	case 'f': return SString::valueOf(getDouble(i));
	case 's': return getString(i);
	}
	ExtValue v;
	get(i, v);
	return v.getString();
}


//////////////////////////////// PARAM ////////////////////////////////////

#ifdef DEBUG
void SimpleAbstractParam::sanityCheck(int i)
{
ParamEntry *pe=entry(i);

const char* t=pe->type;
const char* err=NULL;

if (*t=='p')
	{
	if (pe->fun1==NULL)
		err="no procedure defined";
	}
else
	{
	if (!(pe->flags & PARAM_READONLY))
		{ //write access
		if ((pe->fun2==NULL)&&(pe->offset==PARAM_ILLEGAL_OFFSET))
			err="no field defined (GETONLY without PARAM_READONLY?)";
		}
	}
if (err!=NULL)
	FMprintf("SimpleAbstractParam","sanityCheck", FMLV_ERROR,
		 "Invalid ParamEntry for %s.%s (%s)", getName(), pe->id, err);
}	
#endif

void *SimpleAbstractParam::getTarget(int i)
{
	return (void*)(((char*)object) + entry(i)->offset);
	//return &(object->*(entry(i)->fldptr));
}

///////// get

#ifdef DEBUG
#define SANITY_CHECK(i) sanityCheck(i)
#else
#define SANITY_CHECK(i) 
#endif

paInt SimpleAbstractParam::getInt(int i)
{
	SANITY_CHECK(i);
	ExtValue v;
	ParamEntry *pe = entry(i);
	if (pe->fun1)
	{
		(*(void(*)(void*, ExtValue*))pe->fun1)(object, &v);
		return v.getInt();
	}
	else
	{
		void *target = getTarget(i);
		return *((paInt*)target);
	}
}

double SimpleAbstractParam::getDouble(int i)
{
	SANITY_CHECK(i);
	ExtValue v;
	ParamEntry *pe = entry(i);
	if (pe->fun1)
	{
		(*(void(*)(void*, ExtValue*))pe->fun1)(object, &v);
		return v.getDouble();
	}
	else
	{
		void *target = getTarget(i);
		return *((double*)target);
	}
}

SString SimpleAbstractParam::getString(int i)
{
	SANITY_CHECK(i);
	ExtValue v;
	ParamEntry *pe = entry(i);
	if (pe->fun1)
	{
		(*(void(*)(void*, ExtValue*))pe->fun1)(object, &v);
		return v.getString();
	}
	else
	{
		void *target = getTarget(i);
		return *((SString*)target);
	}
}

ExtObject SimpleAbstractParam::getObject(int i)
{
	SANITY_CHECK(i);
	ExtValue v;
	ParamEntry *pe = entry(i);
	if (pe->fun1)
	{
		(*(void(*)(void*, ExtValue*))pe->fun1)(object, &v);
		return v.getObject();
	}
	else
	{
		void *target = getTarget(i);
		return *((ExtObject*)target);
	}
}

ExtValue SimpleAbstractParam::getExtValue(int i)
{
	SANITY_CHECK(i);
	ExtValue v;
	ParamEntry *pe = entry(i);
	if (pe->fun1)
	{
		(*(void(*)(void*, ExtValue*))pe->fun1)(object, &v);
		return v;
	}
	else
	{
		void *target = getTarget(i);
		return *((ExtValue*)target);
	}
}


//////// set

int SimpleAbstractParam::setInt(int i, paInt x)
{
	SANITY_CHECK(i);
	ExtValue v;
	ParamEntry *pe = entry(i);
	if (pe->flags&PARAM_READONLY) return PSET_RONLY;
	paInt xcopy = x; //only needed for messageOnExceedRange(): retain original, requested value of x because it may be changed below
	paInt a = 0, b = 0;
	int result = 0;
	const char* t = pe->type + 1;
	while (*t) if (*t == ' ') break; else t++;
	if (sscanf(t, PA_INT_SCANF " " PA_INT_SCANF, &a, &b) == 2)
		if (a <= b) // if max<min then the min/max constraint check is not supported
		{
			if (x<a) { x = a; result = PSET_HITMIN; }
			else if (x>b) { x = b; result = PSET_HITMAX; }
		}

	if (pe->fun2)
	{
		v.setInt(x);
		result |= (*(int(*)(void*, const ExtValue*))pe->fun2)(object, &v);
	}
	else
	{
		void *target = getTarget(i);
		if (dontcheckchanges || (*((paInt*)target) != x))
		{
			result |= PSET_CHANGED;
			*((paInt*)target) = x;
		}
	}
	messageOnExceedRange(i, result, xcopy);
	return result;
}

int SimpleAbstractParam::setDouble(int i, double x)
{
	SANITY_CHECK(i);
	ExtValue v;
	ParamEntry *pe = entry(i);
	if (pe->flags&PARAM_READONLY) return PSET_RONLY;
	double xcopy = x; //only needed for messageOnExceedRange(): retain original, requested value of x because it may be changed below
	double a = 0, b = 0;
	int result = 0;
	const char* t = pe->type + 1;
	while (*t) if (*t == ' ') break; else t++;
	if (sscanf(t, "%lg %lg", &a, &b) == 2)
		if (a <= b) // if max<min then the min/max constraint check is not supported
		{
			if (x<a) { x = a; result = PSET_HITMIN; }
			else if (x>b) { x = b; result = PSET_HITMAX; }
		}

	if (pe->fun2)
	{
		v.setDouble(x);
		result |= (*(int(*)(void*, const ExtValue*))pe->fun2)(object, &v);
	}
	else
	{
		void *target = getTarget(i);
		if (dontcheckchanges || (*((double*)target) != x))
		{
			result |= PSET_CHANGED;
			*((double*)target) = x;
		}
	}
	messageOnExceedRange(i, result, xcopy);
	return result;
}

int SimpleAbstractParam::setString(int i, const SString& x)
{
	SANITY_CHECK(i);
	ExtValue v;
	SString vs;
	const SString *xx = &x;
	ParamEntry *pe = entry(i);
	if (pe->flags&PARAM_READONLY) return PSET_RONLY;
	SString xcopy = x; //only needed for messageOnExceedRange(): retain original, requested value of x because it may be changed below
	const char* t = pe->type + 1;
	while (*t) if (*t == ' ') break; else t++;
	paInt a = 0, b = 0;
	int result = 0;
	if (sscanf(t, PA_INT_SCANF " " PA_INT_SCANF, &a, &b) == 2)
	{
		if ((x.len() > b) && (b > 0))
		{
			vs = x.substr(0, b);
			xx = &vs;
			result |= PSET_HITMAX;
		}
	}

	if (pe->fun2)
	{
		v.setString(*xx);
		result |= (*(int(*)(void*, const ExtValue*))pe->fun2)(object, &v);
	}
	else
	{
		void *target = getTarget(i);
		if (dontcheckchanges || (!(*((SString*)target) == *xx)))
		{
			result |= PSET_CHANGED;
			*((SString*)target) = x;
		}
	}
	messageOnExceedRange(i, result, xcopy);
	return result;
}

int SimpleAbstractParam::setObject(int i, const ExtObject& x)
{
	SANITY_CHECK(i);
	ExtValue v;
	ParamEntry *pe = entry(i);
	if (pe->flags&PARAM_READONLY) return PSET_RONLY;
	ExtObject xcopy = x; //only needed for messageOnExceedRange(): retain original, requested value of x because it may be changed below
	if (pe->fun2)
	{
		v.setObject(x);
		int result = (*(int(*)(void*, const ExtValue*))pe->fun2)(object, &v);
		messageOnExceedRange(i, result, xcopy);
		return result;
	}
	else
	{
		void *target = getTarget(i);
		*((ExtObject*)target) = x;
		return PSET_CHANGED;
	}
}

int SimpleAbstractParam::setExtValue(int i, const ExtValue& x)
{
	SANITY_CHECK(i);
	ParamEntry *pe = entry(i);
	if (pe->flags&PARAM_READONLY) return PSET_RONLY;
	ExtValue xcopy = x; //only needed for messageOnExceedRange(): retain original, requested value of x because it may be changed below
	if (pe->fun2)
	{
		int result = (*(int(*)(void*, const ExtValue*))pe->fun2)(object, &x);
		messageOnExceedRange(i, result, xcopy);
		return result;
	}
	else
	{
		void *target = getTarget(i);
		*((ExtValue*)target) = x;
		return PSET_CHANGED;
	}
}

void SimpleAbstractParam::call(int i, ExtValue *args, ExtValue *ret)
{
	SANITY_CHECK(i);
	ParamEntry *pe = entry(i);
	if (!pe) return;
	if (pe->fun1 && (pe->type[0] == 'p'))
		(*(void(*)(void*, ExtValue*, ExtValue*))pe->fun1)(object, args, ret);
	else
	{
		FMprintf("SimpleAbstractParam", "call", FMLV_ERROR,
			(*pe->type != 'p') ? "'%s.%s' is not a function" : "Internal error - undefined function pointer for '%s.%s'", getName(), pe->id);
	}
}

void SimpleAbstractParam::setDefault(bool numericonly)
{
	bool save = dontcheckchanges;
	dontcheckchanges = 1;
	ParamInterface::setDefault(numericonly);
	dontcheckchanges = save;
}

void SimpleAbstractParam::setDefault(int i, bool numericonly)
{
	bool save = dontcheckchanges;
	dontcheckchanges = 1;
	ParamInterface::setDefault(i, numericonly);
	dontcheckchanges = save;
}

// Returns the address of the beginning of the line.
// len = line length (without \n).
// 0 may mean the line with length=0 or the end of the SString.
// poz is advanced to the beginning of the next line.
// A typical loop: for(poz=0;poz<s.d;) {line=getline(s,poz,len);...
static const char *getline(const SString &s, int &poz, int &len)
{
	const char *beg = (const char*)s + poz;
	if (poz >= s.len()) { poz = s.len(); len = 0; return (const char*)s + s.len(); }
	const char *lf = strchr(beg, '\n');
	if (!lf) { lf = (const char*)s + s.len() - 1; poz = s.len(); }
	else { poz = (int)(lf - (const char*)s) + 1; if (poz > s.len()) poz = s.len(); }
	while (lf >= beg) if ((*lf == '\n') || (*lf == '\r')) lf--; else break;
	len = (int)(lf - beg) + 1;
	return beg;
}

int ParamInterface::load2(const SString &s, int &poz)
{
	int i; // the index number of the parameter
	int tmpi;
	int len;
	int ret;
	int fields_loaded = 0;
	const char *t, *lin, *end;
	const char *equals_sign, *comma_sign;
	char remember;
	const char *quote, *quote2;
	const char *value, *valstop;
	SString tmpvalue;
	if (poz >= s.len()) return fields_loaded;
	t = (const char*)s + poz;

	lin = getline(s, poz, len); // all fields must be encoded in a single line
	if (!len) return fields_loaded; // empty line = end
	i = 0;
	end = lin + len;
	while (t < end)
	{
		// processing a single field
		while (strchr(" \n\r\t", *t)) if (t<end) t++; else return fields_loaded;

		comma_sign = strchrlimit(t, ',', end); if (!comma_sign) comma_sign = end;
		quote = strchrlimit(t, '\"', comma_sign);
		if (quote)
		{
			quote2 = skipQuoteString(quote + 1, end);
			if (quote2>comma_sign)
			{
				comma_sign = strchrlimit(quote2 + 1, ',', end);
				if (!comma_sign) comma_sign = end;
			}
			equals_sign = strchrlimit(t, '=', quote);
		}
		else
		{
			equals_sign = strchrlimit(t, '=', comma_sign);
			quote2 = 0;
		}
		if (equals_sign == t) { t++; equals_sign = 0; }
		if (comma_sign == t)	// skip empty value
		{
			t++; i++;
			continue;
		}
		if (equals_sign) // have parameter name
		{
			tmpi = findIdn(t, (int)(equals_sign - t));
			i = tmpi;
			if (tmpi < 0)
				FMprintf("Param", "load2", FMLV_WARN, "Unknown property name for '%s' (ignored)", getName());
			t = equals_sign + 1; // t=value
		}
#ifdef WARN_MISSING_NAME
		else
#ifdef SAVE_SELECTED_NAMES
			if (!(flags(i)&PARAM_CANOMITNAME))
#endif
			{
				FMprintf("Param", "load2", FMLV_WARN, "Missing property name in '%s' (assuming '%s')",
					getName(), id(i) ? id(i) : "unknown property?");
			}
#endif
		if ((i >= 0) && id(i))
		{
			value = t;
			if (quote)
			{
				tmpvalue.copyFrom(quote + 1, (int)(quote2 - quote) - 1);
				sstringUnquote(tmpvalue);
				value = tmpvalue;
				valstop = quote2;
			}
			else
				if (comma_sign < end) valstop = comma_sign; else valstop = end;

			remember = *valstop;
			*(char*)valstop = 0;
			ret = set(i, value);
			fields_loaded++;
			if (ret&(PSET_HITMAX | PSET_HITMIN))
				FMprintf("Param", "load2", FMLV_WARN, "Adjusted '%s' in '%s' (was too %s)",
				id(i), getName(), (ret&PSET_HITMAX) ? "big" : "small");
			*(char*)valstop = remember;
		}

		if (i >= 0) i++;
#ifdef __CODEGUARD__ 
		if (comma_sign<end-1) t=comma_sign+1; else return fields_loaded;
#else
		t = comma_sign + 1;
#endif
	}
	return fields_loaded;
}

int Param::grmember(int g, int a)
{
	if ((getGroupCount() < 2) && (!g))
		return (a < getPropCount()) ? a : -9999;

	ParamEntry *e = entry(0);
	int x = 0, i = 0;
	for (; e->id; i++, e++)
	{
		if (e->group == g)
			if (a == x) return i; else x++;
	}
	return -9999;
}