scarlett/compiler-the-translators
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entries are working but not freeing memory so potential for leaks

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Partho Bhattacharya
2025-02-28 18:16:44 -05:00
parent 2695334db9
commit 63212a3d63
4 changed files with 18 additions and 14 deletions
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BIN
.Makefile.swp
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28
grammar.y
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@ -10,8 +10,8 @@
extern char* yytext; extern char* yytext;
extern int yychar; extern int yychar;
SymbolTable * st; SymbolTable * st;
char* cur_value; //char* cur_value;
char* cur_type; //char* cur_type;
int token_tracker; int token_tracker;
extern int line_number; extern int line_number;
extern int column_number; extern int column_number;
@ -120,8 +120,8 @@ idlist:
; ;
sblock: sblock:
L_BRACE {st = CreateScope(st,1,1);} statement_list {st = getParent(st);} R_BRACE L_BRACE {st = CreateScope(st,2,2);} statement_list {st = getParent(st);} R_BRACE
| L_BRACE {st = CreateScope(st,1,1);} dblock statement_list {st = getParent(st);} R_BRACE | L_BRACE {st = CreateScope(st,2,2);} dblock statement_list {st = getParent(st);} R_BRACE
; ;
dblock: dblock:
@ -143,22 +143,24 @@ declaration_list:
declaration: declaration:
ID COLON ID { ID COLON ID {
printf("declaration rule encountered");
CreateEntry(st,strdup($1),strdup($3));
// printf("declaration rule encountered");
// if(cur_value != NULL){ // if(cur_value != NULL){
// char* delete1 = cur_value; // char* delete1 = cur_value;
printf("delete1 var assigned to cur_value"); // printf("delete1 var assigned to cur_value");
// free(delete1); // free(delete1);
printf("delete1 var freed"); // printf("delete1 var freed");
// } // }
// if(cur_type != NULL){ // if(cur_type != NULL){
// char* delete2 = cur_type; // char* delete2 = cur_type;
// free(delete2);} // free(delete2);}
// int len = strlen($1); // int len = strlen($1);
printf("length determined"); // printf("length determined");
// cur_value = malloc(len + 1); // cur_value = malloc(len + 1);
printf("space allocated"); // printf("space allocated");
// strcpy(cur_value, $1); // strcpy(cur_value, $1);
printf("string copied over"); // printf("string copied over");
// len = strlen($3); // len = strlen($3);
// cur_type = malloc(len + 1); // cur_type = malloc(len + 1);
@ -255,9 +257,9 @@ void yyerror(const char *err) {
} }
int main() { int main() {
char *str = strdup("taco"); //char *str = strdup("taco");
cur_value = NULL; //cur_value = NULL;
cur_type = NULL; //cur_type = NULL;
token_tracker = 1; token_tracker = 1;
st=CreateScope(NULL,1,1); st=CreateScope(NULL,1,1);

4
lexicalStructure.lex
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@ -12,6 +12,8 @@
#ifndef DEBUG #ifndef DEBUG
#define DEBUG 0 #define DEBUG 0
#endif #endif
%} %}
STARCOM [^\*]|\*+[^\)\*]+ STARCOM [^\*]|\*+[^\)\*]+
@ -79,7 +81,7 @@ SCHAR \\n|\\t|\\\"|[^\"\n\\]
"false" {if(DEBUG) {printf( "C_FALSE: %s (%d)\n", yytext, C_FALSE);} else {return C_FALSE;}} "false" {if(DEBUG) {printf( "C_FALSE: %s (%d)\n", yytext, C_FALSE);} else {return C_FALSE;}}
"null" {if(DEBUG) {printf( "C_NULL: %s (%d)\n", yytext, C_NULL);} else {return C_NULL;}} "null" {if(DEBUG) {printf( "C_NULL: %s (%d)\n", yytext, C_NULL);} else {return C_NULL;}}
{ID} {if(DEBUG) {printf( "ID: %s (%d)\n", yytext, ID);} else {return ID;}} {ID} {if(DEBUG) {printf( "ID: %s (%d)\n", yytext, ID);} else {yylval.words = strdup(yytext); return ID;}}
\n {line_number++; column_number = 1;} \n {line_number++; column_number = 1;}
\t {column_number++;} \t {column_number++;}

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parser
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