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#include <iostream>
#include <string.h>
#include "Piraha.hpp"
#include <stdlib.h>
#include <sstream>
#include "cctk_Parameter.h"
#include <map>
#include <math.h>
#define VAR(X) " " #X "=" << X
extern "C" int CCTK_ParameterFilename(int len, char *filename);
std::map<std::string,std::map<std::string,std::string> > values;
typedef std::map<std::string,std::map<std::string,std::string> >::iterator th_iter;
typedef std::map<std::string,std::string>::iterator nm_iter;
// If the value was already defined in this parameter file, look
// it up in the map. Otherwise, get it from Cactus.
bool find_val(std::string thorn,std::string name,std::string& ret) {
th_iter th = values.find(thorn);
if(th != values.end()) {
nm_iter nm = th->second.find(name);
if(nm != th->second.end()) {
ret = nm->second;
return true;
}
}
const cParamData *data = CCTK_ParameterData(name.c_str(),thorn.c_str());
if(data == NULL)
return false;
ret = data->defval;
return true;
}
bool lookup_var(smart_ptr<Group> gr,std::string& res) {
if(gr->group(0)->getPatternName() == "env") {
const char *env = getenv(gr->group(0)->group(0)->substring().c_str());
if(env != NULL) {
res = env;
return true;
}
} else if(gr->group(0)->substring() == "parfile") {
char path[500];
CCTK_ParameterFilename(500, path);
char *value = strrchr (path, '/');
if (value == NULL) {
value = path;
} else {
value++;
}
/* skip the parameter file extension */
if (strcmp (value + strlen (value) - 4, ".par") == 0)
{
value[strlen (value) - 4] = '\0';
}
res = value;
return true;
} else if(gr->group(0)->substring() == "pi") {
std::ostringstream ostr;
ostr << (4.0*atan2(1,1)) << std::flush;
res = ostr.str();
return true;
}
return false;
}
// Converts a value to a string
void meval(smart_ptr<Group> gr,std::string& val) {
val.clear();
if(gr->getPatternName() == "value" || gr->getPatternName() == "paren") {
meval(gr->group(0),val);
} else if(gr->getPatternName() == "quot") {
smart_ptr<Group> inquot = gr->group(0);
val = inquot->substring();
int last = 0;
std::string nw;
for(int i=0;i < inquot->groupCount();i++) {
smart_ptr<Group> vr = inquot->group(i);
std::string sub;
if(lookup_var(vr,sub)) {
int start = vr->start() - inquot->start();
nw += val.substr(last,start-last);
nw += sub;
last = vr->end() - inquot->start();
}
}
if(last < val.size())
nw += val.substr(last,val.size()-last);
val = nw;
} else if(gr->getPatternName() == "par") {
std::string thorn = gr->group(0)->substring();
std::string name = gr->group(1)->substring();
bool found = find_val(thorn,name,val);
if(found) {
;
} else {
val += thorn;
val += "::";
val += name;
}
} else if(gr->getPatternName() == "name") {
val += gr->substring();
} else if(gr->getPatternName() == "num") {
val += gr->substring();
} else if(gr->getPatternName() == "var") {
lookup_var(gr,val);
} else if(gr->getPatternName() == "mexpr") {
if(gr->groupCount()==1) {
meval(gr->group(0),val);
return;
}
std::string val2;
meval(gr->group(0),val2);
double v2 = atof(val2.c_str());
for(int i=1;i < gr->groupCount();i += 2) {
std::string val3;
meval(gr->group(i+1),val3);
double v3 = atof(val3.c_str());
if(gr->group(i)->substring() == "*") {
v2 *= v3;
} else {
v2 /= v3;
}
// std::cout << "MEXPR: " << v2 << gr->group(i)->substring() << v3 << std::endl;
}
std::ostringstream ostr;
ostr << v2 << std::flush;
val = ostr.str();
} else if(gr->getPatternName() == "aexpr") {
if(gr->groupCount()==1) {
meval(gr->group(0),val);
return;
}
std::string val2;
meval(gr->group(0),val2);
double v2 = atof(val2.c_str());
for(int i=1;i < gr->groupCount();i += 2) {
std::string val3;
meval(gr->group(i+1),val3);
double v3 = atof(val3.c_str());
if(gr->group(i)->substring() == "+") {
v2 += v3;
} else {
v2 -= v3;
}
// std::cout << "AEXPR: " << v2 << gr->group(i)->substring() << v3 << std::endl;
}
std::ostringstream ostr;
ostr << v2 << std::flush;
val = ostr.str();
} else if(gr->getPatternName() == "func") {
std::string func_name = gr->group(0)->substring();
std::string arg;
meval(gr->group(1),arg);
std::stringstream ostr;
if(func_name == "sin") {
ostr << sin(atof(arg.c_str()));
} else if(func_name == "cos") {
ostr << cos(atof(arg.c_str()));
} else if(func_name == "sqrt") {
ostr << sqrt(atof(arg.c_str()));
} else if(func_name == "tan") {
ostr << tan(atof(arg.c_str()));
} else if(func_name == "log") {
ostr << log(atof(arg.c_str()));
} else if(func_name == "exp") {
ostr << exp(atof(arg.c_str()));
}
ostr << std::flush;
val = ostr.str();
} else {
std::cout << "Not handled[" << gr->getPatternName() << "]" << std::endl;
abort();
}
}
extern "C" int PirahaParser(const char *buffer,unsigned long buffersize,int (*set_function)(const char *, const char *, int)) {
const char *par_file_src =
"skipper = ([ \\t\\r\\n]|\\#.*)*\n"
"# Note that / occurs in some par files. It is my\n"
"# feeling that this should require quote marks.\n"
"name = [@a-zA-Z_][@/a-zA-Z0-9_-]*\n"
"inquot = ({var}|\\\\.|[^\\\\\"])*\n"
"fname = \\.?/[-\\./0-9a-zA-Z_]+\n"
"quot = \"{inquot}\"|{fname}\n"
"num = [-+]?([0-9]+(\\.[0-9]*|)|\\.[0-9]+)(e[+-][0-9]+|)\n"
"env = ENV\\{{name}\\}\n"
"var = \\$({env}|{name}|\\{{name}\\})\n"
"mulop = [*/]\n"
"mexpr = {value}( {mulop} {value})*\n"
"addop = [+-]\n"
"aexpr = {mexpr}( {addop} {mexpr})*\n"
"paren = \\( {aexpr} \\)\n"
"par = {name} :: {name}\n"
"func = {name} \\( {aexpr} \\)\n"
"array = \\[ {aexpr}( , {aexpr})* \\]\n"
"value = {func}|{paren}|{num}|{quot}|{par}|{name}|{var}\n"
"int = [0-9]+\n"
"index = \\[ {int} \\]\n"
"active = (?i:ActiveThorns)\n"
"set = ({active}|{par}( {index}|)) = ({array}|{aexpr})\n"
"file = ( !DESC {quot}|)( ({set} )*)$\n";
smart_ptr<Grammar> g = new Grammar();
compileFile(g,par_file_src,strlen(par_file_src));
std::string active;
smart_ptr<Matcher> m2 = new Matcher(g,"file",buffer,buffersize);
if(m2->matches()) {
int line = -1;
for(int i=0;i<m2->groupCount();i++) {
smart_ptr<Group> gr = m2->group(i);
if(gr->group(0)->getPatternName() == "active") {
std::string val;
meval(gr->group(1),val);
active += val;
active += ' ';
line = gr->line();
}
}
set_function("ActiveThorns",active.c_str(),line);
for(int i=0;i<m2->groupCount();i++) {
smart_ptr<Group> gr = m2->group(i);
if(gr->getPatternName() != "set")
continue;
smart_ptr<Group> par = gr->group("par");
if(par.valid()) {
// add value->quot->inquot
std::string key;
std::string thorn = par->group("name",0)->substring();
std::string name = par->group("name",1)->substring();
key += thorn;
key += "::";
key += name;
smart_ptr<Group> index = gr->group("index");
if(index.valid()) {
key += '[';
key += index->group(0)->substring();
key += ']';
}
std::string val;
smart_ptr<Group> aexpr = gr->group("aexpr");
if(aexpr.valid()) {
meval(aexpr,val);
values[thorn][key] = val;
set_function(
strdup(key.c_str()),
strdup(val.c_str()),
gr->group(0)->line());
} else {
smart_ptr<Group> arr = gr->group("array");
for(int i=0;i<arr->groupCount();i++) {
aexpr = arr->group(i);
std::ostringstream keyi;
keyi << key << '[' << (i+1) << ']';
meval(aexpr,val);
values[thorn][keyi.str()] = val;
set_function(
strdup(keyi.str().c_str()),
strdup(val.c_str()),
aexpr->line());
}
}
}
}
} else {
std::cout << "ERROR IN PARAMETER FILE: ";
m2->showError();
return 1;
}
return 0;
}
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