/*
Runs through the y86 file, and assign an address to each label
Also stores each source line in source_lines by calling
add_source_line (this just happens to be the easiest place to do so)
*/
void parse_labels(FILE *str_in) {
char line[4096];
int len, cur_addr = 0;
Label *cur_label = NULL;
assert(str_in != NULL);
while (read_y86_line(str_in, line, sizeof(line))) {
if (cur_addr > 4096) {
DBG_PRINT("cur_addr exceeds 4096\n");
exit(0);
}
len = strlen(line);
DBG_PRINT("Read in line: %s\n", line);
if (len == 0)
continue; /* blank line or line with only a comment, so skip */
add_source_line(line, cur_addr);
if (str_ends_with(line, ':')) {
// this is a label line
line[len-1] = '\0';
cur_label = malloc(sizeof(Label));
strcpy(cur_label->name, line);
cur_label->addr = cur_addr;
DBG_PRINT("Got a label line %s at address %x\n", line, cur_addr);
labels = realloc(labels, (num_labels + 1) * sizeof(Label));
labels[num_labels++] = cur_label;
} else {
// this is not a label line, but we still need to keep counting the current address so we know where we are
DBG_PRINT("cur instr size = %d, cur addr = %x\n", get_instr_size(line, cur_addr), cur_addr);
cur_addr += get_instr_size(line, cur_addr); /* line now contains only the instruction */
}
}
}
int get_node_size(node_t cur_node)
{
int cond_size = 0;
int true_size = 0;
if (cur_node == NULL)
return 0;
if (cur_node->conditional_expr != NULL)
{
if (!cur_node->cond_executed)
{
cur_node->cond_executed = 1;
cond_size = get_node_size(cur_node->conditional_expr);
} else {
cur_node->cond_executed = 0;
return 0;
}
}
if (cur_node->instruction_process->instruction_type->type == WHILE){
if (!cur_node->while_executed)
{
cur_node->while_executed = 1;
true_size = get_node_size(cur_node->true_node);
return get_node_size(cur_node->false_node) +
cond_size + true_size +
sizeof(graph_node) +
get_instr_size(cur_node->instruction_process);
} else {
cur_node->while_executed = 0;
return 0;
}
}
return get_node_size(cur_node->true_node) +
cond_size +
sizeof(graph_node) +
get_instr_size(cur_node->instruction_process);
}