/* Find the location of all functions in the program
and store global variables. */
void prescan(void)
{
char *p, *tp;
char temp[32];
int datatype;
int brace = 0; /* When 0, this var tells us that
current source position is outside
of any function. */
p = prog;
func_index = 0;
do {
while(brace) { /* bypass code inside functions */
get_token();
if(*token == '{') brace++;
if(*token == '}') brace--;
}
tp = prog; /* save current position */
get_token();
/* global var type or function return type */
if(tok==CHAR || tok==INT) {
datatype = tok; /* save data type */
get_token();
if(token_type == IDENTIFIER) {
strcpy(temp, token);
get_token();
if(*token != '(') { /* must be global var */
prog = tp; /* return to start of declaration */
decl_global();
}
else if(*token == '(') { /* must be a function */
func_table[func_index].loc = prog;
func_table[func_index].ret_type = datatype;
strcpy(func_table[func_index].func_name, temp);
func_index++;
while(*prog != ')') prog++;
prog++;
/* now prog points to opening curly
brace of function */
}
else putback();
}
}
else if(*token == '{') brace++;
} while(tok != FINISHED);
prog = p;
}
void prescan()
{
char *p;
char temp[32];
int brace = 0;
p = prog;
func_index = 0;
do {
while(brace) {
get_token();
if(*token=='{') brace++;
if(*token=='}') brace--;
}
get_token();
if(tok==CHAR || tok==INT) {
putback();
decl_global();
}
else if(token_type==IDENTIFIER) {
strcpy1(temp, token);
get_token();
if(*token=='(') {
func_table[func_index].loc = prog;
strcpy1(func_table[func_index].func_name, temp);
func_index++;
while(*prog!=')') prog++;
prog++;
}
else
putback();
}
else if(*token=='{')
brace++;
} while(tok!=FINISHED);
prog = p;
}
