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tdevelop/languages/ada/adasupport.cpp

169 lines
3.9 KiB

#include <ctype.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stack>
#include <string>
#include <antlr/AST.hpp>
#include "AdaParser.hpp"
#include "AdaTokenTypes.hpp"
#include "adasupport.hpp"
#define eq !strcmp
using namespace std;
const RefAdaAST AdaAST::nullAdaAST(antlr::nullAST.get() );
using namespace std;
string text (const RefAdaAST& n)
{
if (n == 0 || n == AdaAST::nullAdaAST)
return "";
string retval;
int type = n->getType();
if (type == AdaTokenTypes::DOT) {
const RefAdaAST& sibs = n->down ();
retval = text (sibs);
retval.append (".");
retval.append (text (sibs->right()));
} else {
retval = n->getText();
}
/*
const RefAdaAST& r = n->right();
if (r != 0 && r->getType () == AdaTokenTypes::DOT) {
retval.append (".");
retval.append (text (r->right()));
}
*/
return retval;
}
int txteq (RefAdaAST n1, RefAdaAST n2)
{
if (!n1 || !n2 || n1 == antlr::nullAST || n2 == antlr::nullAST)
return 0;
const char* s1 = n1->getText().c_str();
const char* s2 = n2->getText().c_str();
if (strcasecmp (s1, s2) != 0)
return 0;
n1 = n1->right ();
n2 = n2->right ();
if (!n1 || !n2 || n1 == antlr::nullAST || n2 == antlr::nullAST)
return 1;
if (n1->getType () == AdaTokenTypes::DOT)
if (n2->getType () == AdaTokenTypes::DOT)
return txteq (n1->right (), n2->right ());
else
return 0;
else if (n2->getType () == AdaTokenTypes::DOT)
return 0;
return 1;
}
std::stack<RefAdaAST> defid_stack;
void AdaParser::push_def_id (const RefAdaAST& defid)
{
#ifdef __DEBUG__
string txt (text (defid));
printf ("push_def_id: pushing %s\n", txt.c_str());
#endif
defid_stack.push (defid);
}
const RefAdaAST& AdaParser::pop_def_id ()
{
if (defid_stack.size() == 0) {
fprintf (stderr, "pop_def_id() called on empty stack\n");
// return static_cast<RefAdaAST>(antlr::nullAST);
return AdaAST::nullAdaAST;
}
RefAdaAST& top = defid_stack.top ();
#ifdef __DEBUG__
string txt (text (top));
printf ("pop_def_id: popping %s\n", txt.c_str());
#endif
defid_stack.pop ();
return top;
}
bool AdaParser::end_id_matches_def_id (const RefAdaAST& endid)
{
if (defid_stack.size() == 0)
return false;
RefAdaAST& top = defid_stack.top ();
string defid (text (top));
defid_stack.pop();
if (endid == 0 || endid == antlr::nullAST)
return false;
string txt (text (endid));
if (strcasecmp (defid.c_str (), txt.c_str ()) != 0) {
string errtxt ("End id ");
errtxt.append (txt);
errtxt.append (" does not match ");
errtxt.append (defid);
reportError (errtxt);
return false;
}
#ifdef __DEBUG__
printf ("end_id_matches_def_id: popped %s\n", txt.c_str());
#endif
return true;
}
char * strtolower (char *string)
{
char *p = string;
if (!p)
return NULL;
while (*p)
{
if (isupper (*p))
*p = tolower (*p);
p++;
}
return string;
}
char * extracted_operator (const char *string)
{
int len = strlen (string);
static char op[10];
if (len < 4 && len > 5 || *string != '"' || *(string + len - 1) != '"')
return NULL;
strcpy (op, string + 1);
op[len - 2] = '\0'; /* discard ending quotation mark */
strtolower (op);
return op;
}
bool AdaParser::definable_operator (const char *string)
{ // operator_symbol sans "/="
char *op = extracted_operator (string);
if (op == NULL)
return false;
return
(eq (op, "=") ||
eq (op, "<") || eq (op, ">") ||
eq (op, "<=") || eq (op, ">=") ||
eq (op, "&") || eq (op, "**") ||
eq (op, "*") || eq (op, "/") || eq (op, "+") || eq (op, "-") ||
eq (op, "abs") || eq (op, "rem") || eq (op, "mod") ||
eq (op, "and") || eq (op, "or") || eq (op, "xor") || eq (op, "not"));
}
bool AdaParser::is_operator_symbol (const char *string)
{
char *op;
if (definable_operator (string))
return true;
op = extracted_operator (string);
return (eq (op, "/="));
}