Compilers: Principles and Practice by Pearson

260 Compilers – Principles and Practice

8.8.9 Utility Functions Used

int tcount = 0;

int lcount = 0;

int mcount = 0;

char *tokens[] = {"float","int","string","UNDEF", 0};

char *tokname(int tok){

return strdup(tokens[tok-VAR]);

}

Symbol * tree_root(char *label){

Symbol *np;

np = (Node *)malloc(sizeof(Node));

if(np == NULL) exit(-1);

np->link[0] = NULL; // ptr first child (if any)

np->link[1] = NULL; // ptr next sibling (if any)

np->w.S = (char *)malloc(strlen(label)+1);

strcpy(np->w.S, label); // node label

return np;

}

8.9 Real-life: Intermediate Codes of GNU gcc

GCC – GNU compiler collection (previously expanded as GNU C compiler), gcc/ccl ...