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libdiff.cpp
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#include <iostream>
#include "default.cpp"
#include "funcs.cpp"
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define BUFLEN 1000
using namespace std;
struct operation {
char* a;
int p;
};
struct operations {
operation** a;
int max;
};
long long int stime1=0;
//constans
enum{TREE_DMATH,TREE_DMATHB,TREE_DTREE};
enum {TREE_TNUM,TREE_TVAR,TREE_TUNARY,TREE_TFUNCTION,TREE_TBINARY};
enum {CHAR_TNUM,CHAR_TLETT,CHAR_TOP,CHAR_TEND,CHAR_TBR1,CHAR_TBR2};
//settings
const char* ERROR="Error.";
const char* MATH_BR1="(";
const char* MATH_BR2=")";
const char* MATH_CALC="calc";
operations* MATH_OPS=NULL;
char* MATH_NUMS=strcp("abcde");
char* MATH_VARS=strcp("xyz");
char* MATH_FUNCS=strcp("fgh");
char* MATH_REPLS=strcp("mnop");
char* MATH_DEFDIFF=strcp("x");
strings* MATH_OPLIST=NULL;
char* CONFFILE=strcp(".diff_program");
bool FULLEASY=true;
int DEBUG=0; //0-silent;1-some;2-full
const int TREE_DDEFAULT=TREE_DMATHB;
int MAXITER=100;
const char MATH_CPOSTREPL='|';
const char MATH_CCOMMOND=' ';
const char MATH_CLINESD='\n';
const char MATH_CPOSTREPLD=',';
const char MATH_CPOSTREPLDC='=';
struct token {
char* c;
int t;
};
struct lexer_answer {
token** result;
int max;
bool errors;
};
inline bool char_isnum(char sym) {
return((sym>='0'&&sym<='9')||sym=='.'||sym==',');
}
inline bool char_isnum_m(char sym) {
return((sym>='0'&&sym<='9')||sym=='.'||sym==','||sym=='-');
}
inline bool char_islett(char sym) {
return((sym>='A'&&sym<='Z')||(sym>='a'&&sym<='z'));
}
bool char_isop(char current) {
int i=0;
while(i<=MATH_OPS->max) {
if(MATH_OPS->a[i]->a[0]==current) return(true);
i++;
}
return(false);
}
int char_state(char in) {
if(char_isnum(in)) return(CHAR_TNUM);
if(char_islett(in)) return(CHAR_TLETT);
if(char_isop(in)) return(CHAR_TOP);
if(in==')') return(CHAR_TBR2);
if(in=='(') return(CHAR_TBR1);
if(in=='\0') return(CHAR_TEND);
return(-1);
}
int op_prio(char* a) {
if(!a) return(-1);
int i=0;
while(i<=MATH_OPS->max) {
if(str(MATH_OPS->a[i]->a,a)) return(MATH_OPS->a[i]->p);
i++;
}
cerr << "Warning (prio): unexpected operator [" << a << "]" << endl;
return(0);
}
class tree {
private:
char* display_math(bool brackets=false) {
bool tmp;
char* res=NULL;
if(value==NULL) return(NULL);
if(type()==TREE_TNUM||type()==TREE_TVAR) res=strcp(value);
if(type()==TREE_TUNARY||type()==TREE_TFUNCTION) {
res=strcp(value);
if((tmp=((type()==TREE_TFUNCTION||(a->type()==TREE_TBINARY&&type()==TREE_TUNARY))))) res=stradd(res,MATH_BR1);
res=stradd(res,a->display_math(brackets));
if(tmp) res=stradd(res,MATH_BR2);
}
if(type()==TREE_TBINARY) {
if((tmp=((brackets&&a->type()!=TREE_TNUM&&a->type()!=TREE_TVAR)||(a->type()==TREE_TBINARY&&(op_prio(a->value)<op_prio(value)))))) res=strcp(MATH_BR1);
else res=strcp("");
res=stradd(res,a->display_math(brackets));
if(tmp) res=stradd(res,MATH_BR2);
res=stradd(res,value);
if((tmp=((brackets&&b->type()!=TREE_TVAR&&b->type()!=TREE_TNUM)||(b->type()==TREE_TBINARY&&(op_prio(b->value)<op_prio(value)))))) res=stradd(res,strcp(MATH_BR1));
res=stradd(res,b->display_math(brackets));
if(tmp) res=stradd(res,MATH_BR2);
}
return(res);
}
char* display_tree(int level=0) {
const char* sym=":";
char* res;
char* nl=new char[1];
nl[0]=10;
if(leaf) {
if(!value) return(NULL);
res=repeat(sym,level);
res=stradd(res,value);
res=stradd(res,nl);
}
else {
if(!b) {
res=repeat(sym,level);
res=stradd(res,value);
res=stradd(res,nl);
res=stradd(res,a->display_tree(level+1));
}
else {
res=a->display_tree(level+1);
res=stradd(res,repeat(sym,level));
res=stradd(res,value);
res=stradd(res,nl);
res=stradd(res,b->display_tree(level+1));
}
}
if(!level) {
char* res_=new char[strlen(res)];
res[strlen(res)-1]=NULL;
strcpy(res_,res);
res=res_;
}
return(res);
}
char* value;
bool leaf;
tree *a,*b;
public:
tree(const char* str): value(strcp(str)),leaf(true) {}
tree(tree *in_a,const char* op,tree *in_b): value(strcp(op)),leaf(false),a(in_a),b(in_b) {}
tree(const char *op,tree *in_): value(strcp(op)),leaf(false),a(in_),b(NULL) {}
tree(const char* ina, const char* op, const char* inb): value(strcp(op)),leaf(false) {
a=new tree(ina);
b=new tree(inb);
}
tree(const char* op,const char* in_): value(strcp(op)),leaf(false),b(NULL) {
a=new tree(in_);
}
tree():value(NULL),leaf(false),a(NULL),b(NULL){}
tree* copymem() {
tree* nt;
char* s=strcp(value);
if(leaf) nt=new tree(s);
else {
if(!b) nt=new tree(s,a->copymem());
else nt=new tree(a->copymem(),s,b->copymem());
}
return(nt);
}
bool operator==(tree x) {
int ctype=type();
if(x.type()!=ctype) return(false);
else {
if(ctype==TREE_TVAR||ctype==TREE_TNUM) return(str(value,x.value));
else if(ctype==TREE_TFUNCTION||ctype==TREE_TUNARY) return(str(value,x.value)&&(*a==*(x.a)));
else if(ctype==TREE_TBINARY) return(str(value,x.value)&&(*a==*(x.a))&&(*b==*(x.b)));
return(false);
}
}
bool operator!=(tree x) {
return(!(x==*this));
}
inline bool isleaf() {
return(leaf);
}
tree* geta() {
return(a);
}
tree* getb() {
return(b);
}
char* getvalue() {
return(value);
}
bool contains(const char* src) {
if(leaf) return(str(src,value));
else {
if(b==NULL) return(a->contains(src));
else return(a->contains(src)||b->contains(src));
}
}
bool test() {
if(leaf) {
if(!value) return(false);
}
else {
if(!a) return(false);
if(!b) return(a->test());
else return(a->test()&&b->test());
}
return(true);
}
int type() {
if(leaf) {
if(char_isnum_m(value[0])) return(TREE_TNUM);
else return(TREE_TVAR);
}
else {
if(!b) {
if(char_islett(value[0])) return(TREE_TFUNCTION);
else return(TREE_TUNARY);
}
else return(TREE_TBINARY);
}
}
int varcount() {
int ttype=type();
if(ttype==TREE_TUNARY||ttype==TREE_TFUNCTION) return(a->varcount());
else if(ttype==TREE_TBINARY) return(a->varcount()+b->varcount());
else if(ttype==TREE_TVAR) return(1);
else return(0);
}
int lenght() {
int ttype=type();
if(ttype==TREE_TVAR||ttype==TREE_TNUM) return(1);
else if(ttype==TREE_TFUNCTION||ttype==TREE_TUNARY) return(1+a->lenght());
else if(ttype==TREE_TBINARY) return(1+a->lenght()+b->lenght());
else return(0);
}
int opcount() {
int ttype=type();
if(ttype==TREE_TUNARY||ttype==TREE_TFUNCTION) return(1+a->opcount());
else if(ttype==TREE_TBINARY) return(2+a->opcount()+b->opcount());
else if(ttype==TREE_TVAR) return(1);
else return(0);
}
void operator=(tree *src) {
tree *newtree;
newtree=src->copymem();
leaf=newtree->leaf;
value=newtree->value;
a=newtree->a;
b=newtree->b;
}
char* display(int dtype=TREE_DDEFAULT) {
if(dtype==TREE_DMATH) return(display_math());
else if(dtype==TREE_DTREE) return(display_tree());
else if(dtype==TREE_DMATHB) return(display_math(true));
else return(display(TREE_DDEFAULT));
}
};
struct replacer {
char* l;
tree* r;
};
struct replacers {
replacer** r;
int maxindex;
};
struct trees {
tree** t;
int max;
};
lexer_answer* lexer(char* cstr) {
int i=0,cstate=0,pstate=0;
int len=strlen(cstr);
char c,*tmp;
lexer_answer* res=new lexer_answer;
res->result=new token*[len];
res->max=-1;
while(i<len) {
c=cstr[i];
if(c=='.') c=',';
cstate=char_state(c);
if(cstate==-1) cerr << "Warning (lexer): wrong symbol '" << c << "' at " << i << endl;
else {
tmp=new char[2];
tmp[0]=c;
tmp[1]=0;
if(res->max==-1||cstate!=pstate||cstate==CHAR_TBR2||cstate==CHAR_TBR1||cstate==CHAR_TOP) {
res->result[++(res->max)]=new token;
res->result[res->max]->t=cstate;
res->result[res->max]->c=tmp;
}
else res->result[res->max]->c=stradd(res->result[res->max]->c,tmp);
}
pstate=cstate;
i++;
}
res->errors=false;
return(res);
}
bool testbrackets(lexer_answer* src,int pmin=0,int pmax=-1) {
if(pmax==-1) pmax=src->max;
int bc1=0,bc2=0;
while(pmin<=pmax) {
if(src->result[pmin]->t==CHAR_TBR1) bc1++;
if(src->result[pmin]->t==CHAR_TBR2) bc2++;
pmin++;
}
return(bc1==bc2);
}
int getlast(lexer_answer* src,int type,int pmin=0,int i=-1,bool notinsidebrackets=false,bool nounary=false) {
if(i==-1) i=src->max;
int bc=0;;
while(i>=pmin) {
if(src->result[i]->t==CHAR_TBR2) bc++;
if(src->result[i]->t==CHAR_TBR1) bc--;
if(src->result[i]->t==type) {
if((!notinsidebrackets)||(bc==0)) {
if(!nounary) {
return(i);
}
else {
if(i>pmin) {
if(src->result[i-1]->t!=CHAR_TBR1&&src->result[i-1]->t!=CHAR_TOP) return(i);
}
}
}
}
i--;
}
return(-1);
}
bool brackets_nospace(lexer_answer* src,int left,int right) {
if(src->result[left]->t==CHAR_TBR1&&src->result[right]->t==CHAR_TBR2) {
int br=1;
left++;
while(left<right) {
if(src->result[left]->t==CHAR_TBR1) br++;
if(src->result[left]->t==CHAR_TBR2) br--;
if(br==0) return(false);
left++;
}
}
else return(false);
return(true);
}
int minopprio(lexer_answer* src,int pmin=0,int pmax=-1) {
if(pmax==-1) pmax=src->max;
int minprio=100;
int bc=0;
while(pmax>=pmin) {
if(src->result[pmax]->t==CHAR_TBR2) bc++;
if(src->result[pmax]->t==CHAR_TBR1) bc--;
if(src->result[pmax]->t==CHAR_TOP) {
if(!bc) minprio=min(minprio,op_prio(src->result[pmax]->c));
}
pmax--;
}
return(minprio);
}
tree* parser(lexer_answer* src,int pmin=0,int pmax=-1,bool binary_allowed=true);
tree* parser_atomic(lexer_answer* src,int pmin,int pmax) {
if(pmin==pmax) return(new tree(src->result[pmin]->c));
return(NULL);
}
tree* parser_brackets(lexer_answer* src,int pmin,int pmax) {
if((pmax-pmin)>=2&&src->result[pmin]->t==CHAR_TBR1&&src->result[pmax]->t==CHAR_TBR2&&brackets_nospace(src,pmin,pmax)) {
return(parser(src,pmin+1,pmax-1));
}
return(NULL);
}
tree* parser_unary(lexer_answer* src,int pmin,int pmax) {
if((pmax-pmin)>=1&&src->result[pmin]->t==CHAR_TOP) {
return(new tree(src->result[pmin]->c,parser(src,pmin+1,pmax)));
}
return(NULL);
}
tree* parser_function(lexer_answer* src,int pmin,int pmax) {
if((pmax-pmin)>=3&&src->result[pmin]->t==CHAR_TLETT&&src->result[pmin+1]->t==CHAR_TBR1
&&src->result[pmax]->t==CHAR_TBR2&&brackets_nospace(src,pmin+1,pmax)) {
return(new tree(src->result[pmin]->c,parser(src,pmin+2,pmax-1)));
}
return(NULL);
}
tree* parser(lexer_answer* src,int pmin,int pmax,bool binary_allowed) {
if(pmax==-1) pmax=src->max;
if(pmax<pmin) return(NULL);
int op_pos=getlast(src,CHAR_TOP,pmin,pmax,true,true);
tree* r1=NULL,*r2=NULL;
if(op_pos!=-1) {
if(binary_allowed) {
bool btest=false;
while(!btest) {
if(op_pos!=-1) {
if((r1=parser(src,pmin,op_pos-1,false))!=NULL) btest=true;
else if(minopprio(src,pmin,op_pos-1)>=op_prio(src->result[op_pos]->c)) {
btest=true;
r1=parser(src,pmin,op_pos-1);
}
if(btest) {
if(!(r2=parser(src,op_pos+1,pmax,false))) r2=parser(src,op_pos+1,pmax);
}
else {
op_pos=getlast(src,CHAR_TOP,pmin,op_pos-1,true,true);
continue;
}
if(btest&&r1&&r2) return(new tree(r1,src->result[op_pos]->c,r2));
else return(NULL);
}
else btest=true;
}
}
}
else {
if((r1=parser_function(src,pmin,pmax))!=NULL) return(r1);
if((r1=parser_unary(src,pmin,pmax))!=NULL) return(r1);
if((r1=parser_brackets(src,pmin,pmax))!=NULL) return(r1);
if((r1=parser_atomic(src,pmin,pmax))!=NULL) return(r1);
}
return(NULL);
}
tree* parse(char* src) {
if(str(src,"")) return(NULL);
lexer_answer* a=lexer(src);
if(a!=NULL) {
tree* b=parser(a);
if(b&&b->test()) return(b);
}
return(NULL);
}
unsigned int pattern_count_funcs(tree* p) {
int ptype=p->type();
if(ptype==TREE_TVAR) {
if(strchar(MATH_FUNCS,p->getvalue())||strchar(MATH_NUMS,p->getvalue())) return(1);
}
if(ptype==TREE_TUNARY||ptype==TREE_TFUNCTION) {
if(strchar(MATH_FUNCS,p->getvalue())) return(pattern_count_funcs(p->geta())+1);
else return(pattern_count_funcs(p->geta()));
}
if(ptype==TREE_TBINARY) {
return(pattern_count_funcs(p->geta())+pattern_count_funcs(p->getb()));
}
return(0);
}
tree* getreplacer(replacers* src,char* a) {
int i=0;
if(src!=NULL&&a!=NULL) {
if(src->r!=NULL) {
while(i<=src->maxindex) {
if(src->r[i]!=NULL) {
if((src->r[i]->l!=NULL)&&(src->r[i]->r!=NULL)) {
if(str(src->r[i]->l,a)) {
if(src->r[i]->r->test()) return(src->r[i]->r);
}
}
}
i++;
}
}
}
return(NULL);
}
bool replacer_add(replacers* src,char* a,tree* which) {
if(!a||!src||!which) return(false);
tree* repl=getreplacer(src,a);
if(repl==NULL) {
src->maxindex++;
src->r[src->maxindex]=new replacer;
src->r[src->maxindex]->l=a;
src->r[src->maxindex]->r=which;
}
else if(!(*repl==*which)) return(false);
return(true);
}
replacers* pattern(tree* stree, tree* spattern,const char* base=MATH_DEFDIFF,replacers* areplacers=NULL) {
replacers* crepl=NULL;
int fcount=pattern_count_funcs(spattern);
if(areplacers==NULL) {
crepl=new replacers;
crepl->maxindex=-1;
crepl->r=new replacer*[fcount+1];
}
else crepl=areplacers;
int ttype=stree->type();
int ptype=spattern->type();
if(ptype==ttype) {
if(ttype==TREE_TNUM) {
if(!str(stree->getvalue(),spattern->getvalue())) {
return(NULL);
}
}
if(ttype==TREE_TVAR) {
if(strchar(MATH_FUNCS,spattern->getvalue())) {
if(!replacer_add(crepl,spattern->getvalue(),stree)) {
return(NULL);
}
}
else if(strchar(MATH_VARS,spattern->getvalue())) {
if(str(stree->getvalue(),base)) {
if(!replacer_add(crepl,spattern->getvalue(),stree)) {
return(NULL);
}
}
else return(NULL);
}
else if(strchar(MATH_NUMS,spattern->getvalue())) {
if(!str(stree->getvalue(),base)) {
if(!replacer_add(crepl,spattern->getvalue(),stree)) {
return(NULL);
}
}
else return(NULL);
}
else if(!str(stree->getvalue(),spattern->getvalue())) {
return(NULL);
}
}
if(ttype==TREE_TFUNCTION) {
if(strchar(MATH_FUNCS,spattern->getvalue())) {
if(!replacer_add(crepl,spattern->getvalue(),(new tree(strcp(stree->getvalue())))->copymem())) {
return(NULL);
}
if(!pattern(stree->geta(),spattern->geta(),base,crepl)) {
return(NULL);
}
}
else if(str(spattern->getvalue(),stree->getvalue())) {
if(!pattern(stree->geta(),spattern->geta(),base,crepl)) {
return(NULL);
}
}
else return(NULL);
}
if(ttype==TREE_TUNARY) {
if(str(stree->getvalue(),spattern->getvalue())) {
if(!pattern(stree->geta(),spattern->geta(),base,crepl)) {
return(NULL);
}
}
else return(NULL);
}
if(ttype==TREE_TBINARY) {
if(str(stree->getvalue(),spattern->getvalue())) {
if(!pattern(stree->geta(),spattern->geta(),base,crepl)) {
return(NULL);
}
if(!pattern(stree->getb(),spattern->getb(),base,crepl)) {
return(NULL);
}
}
else return(NULL);
}
}
else {
if(ptype==TREE_TVAR) {
if(strchar(MATH_FUNCS,spattern->getvalue())) {
if(!replacer_add(crepl,spattern->getvalue(),stree)) {
return(NULL);
}
}
else if(strchar(MATH_NUMS,spattern->getvalue())) {
if(ttype==TREE_TBINARY) {
if((stree->geta()->contains(base))||(stree->getb()->contains(base))) {
return(NULL);
}
if(!replacer_add(crepl,spattern->getvalue(),stree)) {
return(NULL);
}
}
if(ttype==TREE_TUNARY||ttype==TREE_TFUNCTION) {
if(stree->geta()->contains(base)) return(NULL);
if(!replacer_add(crepl,spattern->getvalue(),stree)) {
return(NULL);
}
}
if(ttype==TREE_TNUM) {
if(!replacer_add(crepl,spattern->getvalue(),stree)) {
return(NULL);
}
}
}
else return(NULL);
}
else return(NULL);
}
return(crepl);
}
tree* replace(tree* spattern,replacers* srepl) {
if(!spattern) return(NULL);
if(!srepl) return(spattern);
int stype=spattern->type();
tree* rtree=NULL,*tmp=NULL;
if(stype==TREE_TVAR) {
if((rtree=getreplacer(srepl,spattern->getvalue()))!=NULL) {
return(rtree);
}
else return(spattern);
}
if(stype==TREE_TNUM) rtree=spattern->copymem();
if(stype==TREE_TUNARY) {
rtree=new tree(spattern->getvalue(),replace(spattern->geta(),srepl));
}
if(stype==TREE_TFUNCTION) {
if((tmp=getreplacer(srepl,spattern->getvalue()))!=NULL) {
rtree=new tree(tmp->getvalue(),replace(spattern->geta(),srepl));
}
else {
rtree=new tree(spattern->getvalue(),replace(spattern->geta(),srepl));
}
}
if(stype==TREE_TBINARY) {
rtree=new tree(replace(spattern->geta(),srepl),spattern->getvalue(),replace(spattern->getb(),srepl));
}
return(rtree);
}
struct rule {
tree* src;
tree* dest;
int op;
replacers* postrepl;
};
struct rules {
rule** r;
int maxindex;
};
rules* FRULES=NULL;
rule* parsestr(char* str) {
strings* t=explode(str,MATH_CPOSTREPL);
strings* l=NULL;
strings* r=NULL;
rule* res=new rule;
strings* tmp=NULL;
tree* ttree;
replacers* prepl=NULL;
int rcount=0,i=0;
res->postrepl=NULL;
if(t->max==0) {
l=explode(str,MATH_CCOMMOND);
if(!l||l->max==-1) return(NULL);
}
else if(t->max==1) {
l=explode(t->strs[0],MATH_CCOMMOND);
r=explode(t->strs[1],MATH_CPOSTREPLD);
if(!l||!r||l->max==-1||r->max==-1) return(NULL);
if(r->max>=0) {
prepl=new replacers;
prepl->r=new replacer*[r->max+1];
while(i<=r->max) {
tmp=explode(r->strs[i],MATH_CPOSTREPLDC);
if(tmp->max==1) {
prepl->r[rcount]=new replacer;
prepl->r[rcount]->l=tmp->strs[0];
ttree=parse(tmp->strs[1]);
if(ttree!=NULL) {
prepl->r[rcount]->r=ttree;
rcount++;
}
}
i++;
}
if(rcount>=0) {
prepl->maxindex=rcount-1;
res->postrepl=prepl;
}
}
}
if(l==NULL||l->max==2) {
res->src=parse(l->strs[0]);
res->op=atoi(l->strs[1]);
res->dest=parse(l->strs[2]);
if(!(res->src)||!(res->dest)) return(NULL);
return(res);
}
return(NULL);
}
rules* rules_merge(rules* a,rules* b) {
rules* res=new rules;
res->maxindex=-1;
if(a&&b) {
res->r=new rule*[a->maxindex+b->maxindex+3];
int i=0;
while(i<=a->maxindex) {
res->r[++res->maxindex]=a->r[i];
i++;
}
i=0;
while(i<=b->maxindex) {
res->r[++res->maxindex]=b->r[i];
i++;
}
}
return(res);
}
bool contains(tree* where,tree* what,bool pointer=true) {
if((pointer&&where==what)||(*where==*what&&!pointer)) return(true);
if(where->type()==TREE_TBINARY) return(contains(where->geta(),what,pointer)||contains(where->getb(),what,pointer));
if(where->type()==TREE_TFUNCTION||where->type()==TREE_TUNARY) return(contains(where->geta(),what,pointer));
return(false);
}
int length(tree* where, tree* a,bool addleft=false,bool addright=false) {
if(where==a) return(0);
int wtype=where->type(),tlen;
if(wtype==TREE_TFUNCTION||wtype==TREE_TUNARY) {
tlen=length(where->geta(),a);
if(tlen!=-1) return(1+tlen);
}
if(wtype==TREE_TBINARY) {
tlen=length(where->geta(),a);
if(tlen!=-1) return(addleft?2+tlen:1+tlen);
tlen=length(where->getb(),a);
if(tlen!=-1) return(addright?2+tlen:1+tlen);
}
return(-1);
}
int length(tree* where,tree* a,tree* b) {
int wtype=where->type(),tlen1,tlen2;
if(wtype==TREE_TFUNCTION||wtype==TREE_TUNARY) {
return(length(where->geta(),a,b));
}
if(wtype==TREE_TBINARY) {
bool aca=contains(where->geta(),a);
bool acb=contains(where->geta(),b);
bool bca=contains(where->getb(),a);
bool bcb=contains(where->getb(),b);
if(aca&&acb) return(length(where->geta(),a,b));
if(bca&&bcb) return(length(where->getb(),a,b));
if(aca&&bcb) {
if(where->geta()==a&&where->getb()==b) return(0);
tlen1=length(where->geta(),a);
tlen2=length(where->getb(),b);
if(tlen1!=-1&&tlen2!=-1) return(1+tlen1+tlen2);
}
if(acb&&bca) {
tlen1=length(where->geta(),b);
tlen2=length(where->getb(),a);
if(tlen1!=-1&&tlen2!=-1) return(2+tlen1+tlen2);
}
}
return(-1);
}
struct treerepls {
tree* t;
replacers* r;
};
treerepls* rule_apply(tree* src,rule* r,char* base,replacers* repls) {
treerepls* res=new treerepls;
res->r=pattern(src,r->src,base,repls);
if(!res->r) return(NULL);
res->t=replace(r->dest,res->r);
return(res);
}
tree* rule_apply(tree* src,rule* r,char* base) {
replacers* a=pattern(src,r->src,base);
if(!a) return(NULL);
return(replace(r->dest,a));
}
struct treemin {
tree* t;
int l;
};
unsigned int TJ_CALLS=0;
treemin* tree_join(tree* where,tree* a,bool addleft=false,bool addright=false,treemin* w=NULL) {
if(!(addleft||addright)) {
treemin* x=tree_join(where,a,false,true,w),*y=tree_join(where,a,true,false,w);
if(x->l<y->l) return(x);
return(y);
}
treemin* res;
tree* ttree;
int tlen;
if(where==a||!contains(where,a)) {
res=new treemin;
res->l=length(where,a,addleft,addright);
res->t=where;
return(res);
}
//cerr << "TJ called: where=" << where->display() << " what=" << a->display() << " al=" << addleft << " ar=" << addright << " tmin=?" << (w!=NULL) << endl;
if(where->type()==TREE_TUNARY||where->type()==TREE_TFUNCTION) {
if(contains(where->geta(),a)) where=new tree(where->getvalue(),tree_join(where->geta(),a)->t);
}
if(where->type()==TREE_TBINARY) {
if(contains(where->geta(),a)) where=new tree(tree_join(where->geta(),a)->t,where->getvalue(),where->getb());
if(contains(where->getb(),a)) where=new tree(where->geta(),where->getvalue(),tree_join(where->getb(),a)->t);
}
if(w) res=w;
else {
res=new treemin;
res->l=length(where,a,addleft,addright);
res->t=where;
}
int i=0;
while(i<=FRULES->maxindex) {
if(FRULES->r[i]->op==0&&(ttree=rule_apply(where,FRULES->r[i],MATH_DEFDIFF))) {
stime1-=mtime();
tlen=length(ttree,a,addleft,addright);
stime1+=mtime();
if(tlen<res->l) {
res->l=tlen;
res->t=ttree;
tree_join(ttree,a,false,false,res);
i=FRULES->maxindex+2;
}
}
i++;
}
return(res);
}
tree* tree_join(tree* where,tree* a,tree* b) {
if(!a||!b) return(NULL);
int wtype=where->type();
tree* ttree,*ttree1,*ttree2;
if(wtype==TREE_TBINARY) {
bool aca=contains(where->geta(),a);
bool acb=contains(where->geta(),b);
bool bca=contains(where->getb(),a);
bool bcb=contains(where->getb(),b);
if(aca&&acb) {
ttree=tree_join(where->geta(),a,b);
if(ttree) where=new tree(ttree,where->getvalue(),where->getb());
else return(NULL);
}
if(bca&&bcb) {
ttree=tree_join(where->getb(),a,b);
if(ttree) where=new tree(where->geta(),where->getvalue(),ttree);
else return(NULL);
}
//здесь обязательно явно указывать "направление" дерева!
if(aca&&bcb) where=new tree(tree_join(where->geta(),a,true,false)->t,where->getvalue(),tree_join(where->getb(),b,false,true)->t);
if(bca&&acb) where=new tree(tree_join(where->geta(),b,true,false)->t,where->getvalue(),tree_join(where->getb(),a,false,true)->t);
}
//if(*wsrc!=*where) cerr << "TJ-mod: " << wsrc->display() << " => " << where->display() << endl;
int i=0;
int slen=length(where,a,b),dlen,dlen1;
if(!slen) return(where);
while(i<=FRULES->maxindex) {
if(FRULES->r[i]->op==0&&(ttree1=rule_apply(where,FRULES->r[i],MATH_DEFDIFF))) {
dlen=length(ttree1,a,b);
//cerr << "TJ1: where=" << where->display() << " a=" << a->display() << " b=" << b->display() << " (" << slen << ") trying rule #" << i << " " << FRULES->r[i]->src->display() << " => " << ttree1->display() << " (" << dlen << ")" << endl;
if(dlen<slen) {
if(!dlen) return(ttree1);
ttree2=tree_join(ttree1,a,b);
if(ttree2) {
dlen1=length(ttree2,a,b);
if(!dlen1) return(ttree2);
}
}
}
i++;
}
return(NULL);
}
tree* rreplace(tree* where,rule* r,char* base,bool* replaced) {
tree *tmp1=NULL;
if((tmp1=rule_apply(where,r,base))) {
*replaced=true;
return(tmp1);
}
int wtype=where->type();
if(wtype==TREE_TUNARY||wtype==TREE_TFUNCTION) return(new tree(where->getvalue(),rreplace(where->geta(),r,base,replaced)));
if(wtype==TREE_TBINARY) return(new tree(rreplace(where->geta(),r,base,replaced),where->getvalue(),rreplace(where->getb(),r,base,replaced)));
return(where);
}
replacers* copy_replacers(replacers* src) {
replacers* res=new replacers;
res->maxindex=src->maxindex;
res->r=new replacer*[res->maxindex+1];
int i=0;
while(i<=src->maxindex) {
res->r[i]=new replacer;
res->r[i]->l=strcp(src->r[i]->l);
res->r[i]->r=src->r[i]->r->copymem();
i++;
}
return(res);
}
trees* find_all(tree* where,tree* spattern,char* base,replacers* repl=NULL,trees* ut=NULL) {
trees* res=NULL;
if(ut==NULL) {
res=new trees;
res->max=-1;
res->t=new tree*[where->varcount()*2];
}
else res=ut;
replacers* wr=NULL,*wr1,*wr2;
if(repl==NULL) {
wr=new replacers;
wr->maxindex=-1;
wr->r=new replacer*[pattern_count_funcs(where)+1];
}
else wr=repl;
int wtype=where->type();
wr1=copy_replacers(wr);
if(repl!=NULL&&(wr2=pattern(where,spattern,base,wr1))) {
wr=wr2;
res->max++;
res->t[res->max]=where;
}
if(wtype==TREE_TBINARY) {
find_all(where->geta(),spattern,base,wr,res);
find_all(where->getb(),spattern,base,wr,res);
}
if(wtype==TREE_TUNARY||wtype==TREE_TFUNCTION) find_all(where->geta(),spattern,base,wr,res);
return(res);
}
void print_trees(trees* a) {
int i=0;
while(i<=a->max) {
cerr << "trees[" << i << "]: " << a->t[i]->display(TREE_DMATHB) << endl;
i++;
}
cerr << "ok" << endl;
}
tree* tree_replace_r(tree* src,tree* a,tree* b,rule* trule,bool one=true) {
if(DEBUG>1) cerr << "a=" << a->display() << " b=" << b->display() << endl;
trees* l1=find_all(src,a,MATH_DEFDIFF),*l2=find_all(src,b,MATH_DEFDIFF),*tt;
if(DEBUG>1) {
cerr << "==l1==" << endl;
print_trees(l1);
cerr << "==l2==" << endl;