cpp.c

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		case CPP_GOTO:
		case CPP_IF:
		case CPP_RETURN:
		case CPP_SWITCH:
		case CPP_TRY:
		case CPP_WHILE:
			if (wflag && !startmacro && level == 0)
				warning("Out of function. %8s [+%d %s]", token, lineno, curfile);
			break;
		case CPP_TYPEDEF:
			if (tflag) {
				char savetok[MAXTOKEN];
				int savelineno = 0;
				int typedef_savelevel = level;

				savetok[0] = 0;

				/* skip CV qualifiers */
				do {
					c = nexttoken("{}(),;", cpp_reserved_word);
				} while (IS_CV_QUALIFIER(c) || c == '\n');

				if (wflag && c == EOF) {
					warning("unexpected eof. [+%d %s]", lineno, curfile);
					break;
				} else if (c == CPP_ENUM || c == CPP_STRUCT || c == CPP_UNION) {
					char *interest_enum = "{},;";
					int c_ = c;

					c = nexttoken(interest_enum, cpp_reserved_word);
					/* read enum name if exist */
					if (c == SYMBOL) {
						if (target == SYM)
							PUT(token, lineno, sp);
						c = nexttoken(interest_enum, cpp_reserved_word);
					}
					for (; c != EOF; c = nexttoken(interest_enum, cpp_reserved_word)) {
						switch (c) {
						case SHARP_IFDEF:
						case SHARP_IFNDEF:
						case SHARP_IF:
						case SHARP_ELIF:
						case SHARP_ELSE:
						case SHARP_ENDIF:
							condition_macro(c, target);
							continue;
						default:
							break;
						}
						if (c == ';' && level == typedef_savelevel) {
							if (savetok[0] && target == DEF)
								PUT(savetok, savelineno, sp);
							break;
						} else if (c == '{')
							level++;
						else if (c == '}') {
							if (--level == typedef_savelevel)
								break;
						} else if (c == SYMBOL) {
							if (c_ == CPP_ENUM) {
								if (target == DEF && level > typedef_savelevel)
									PUT(token, lineno, sp);
								if (target == SYM && level == typedef_savelevel)
									PUT(token, lineno, sp);
							} else {
								if (target == REF) {
									if (level > typedef_savelevel && defined(token))
										PUT(token, lineno, sp);
								} else if (target == SYM) {
									if (!defined(token))
										PUT(token, lineno, sp);
								} else if (target == DEF) {
									/* save lastest token */
									strlimcpy(savetok, token, sizeof(savetok));
									savelineno = lineno;
								}
							}
						}
					}
					if (c == ';')
						break;
					if (wflag && c == EOF) {
						warning("unexpected eof. [+%d %s]", lineno, curfile);
						break;
					}
				} else if (c == SYMBOL) {
					if (target == REF && defined(token))
						PUT(token, lineno, sp);
					if (target == SYM && !defined(token))
						PUT(token, lineno, sp);
				}
				savetok[0] = 0;
				while ((c = nexttoken("(),;", cpp_reserved_word)) != EOF) {
					switch (c) {
					case SHARP_IFDEF:
					case SHARP_IFNDEF:
					case SHARP_IF:
					case SHARP_ELIF:
					case SHARP_ELSE:
					case SHARP_ENDIF:
						condition_macro(c, target);
						continue;
					default:
						break;
					}
					if (c == '(')
						level++;
					else if (c == ')')
						level--;
					else if (c == SYMBOL) {
						if (level > typedef_savelevel) {
							if (target == SYM)
								PUT(token, lineno, sp);
						} else {
							/* put latest token if any */
							if (savetok[0]) {
								if (target == SYM)
									PUT(savetok, savelineno, sp);
							}
							/* save lastest token */
							strlimcpy(savetok, token, sizeof(savetok));
							savelineno = lineno;
						}
					} else if (c == ',' || c == ';') {
						if (savetok[0]) {
							if (target == DEF)
								PUT(savetok, lineno, sp);
							savetok[0] = 0;
						}
					}
					if (level == typedef_savelevel && c == ';')
						break;
				}
				if (wflag) {
					if (c == EOF)
						warning("unexpected eof. [+%d %s]", lineno, curfile);
					else if (level != typedef_savelevel)
						warning("() block unmatched. (last at level %d.)[+%d %s]", level, lineno, curfile);
				}
			}
			break;
		case CPP___ATTRIBUTE__:
			process_attribute(target);
			break;
		default:
			break;
		}
	}
	strbuf_close(sb);
	if (wflag) {
		if (level != 0)
			warning("{} block unmatched. (last at level %d.)[+%d %s]", level, lineno, curfile);
		if (piflevel != 0)
			warning("#if block unmatched. (last at level %d.)[+%d %s]", piflevel, lineno, curfile);
	}
	closetoken();
}
/*
 * process_attribute: skip attributes in __attribute__((...)).
 *
 *	r)	target type
 */
static void
process_attribute(target)
	int target;
{
	int brace = 0;
	int c;
	/*
	 * Skip '...' in __attribute__((...))
	 * but pick up symbols in it.
	 */
	while ((c = nexttoken("()", cpp_reserved_word)) != EOF) {
		if (c == '(')
			brace++;
		else if (c == ')')
			brace--;
		else if (c == SYMBOL) {
			if (target == REF) {
				if (defined(token))
					PUT(token, lineno, sp);
			} else if (target == SYM) {
				if (!defined(token))
					PUT(token, lineno, sp);
			}
		}
		if (brace == 0)
			break;
	}
}
/*
 * function_definition: return if function definition or not.
 *
 *	r)	target type
 */
static int
function_definition(target)
	int target;
{
	int c;
	int brace_level;

	brace_level = 0;
	while ((c = nexttoken("()", cpp_reserved_word)) != EOF) {
		switch (c) {
		case SHARP_IFDEF:
		case SHARP_IFNDEF:
		case SHARP_IF:
		case SHARP_ELIF:
		case SHARP_ELSE:
		case SHARP_ENDIF:
			condition_macro(c, target);
			continue;
		default:
			break;
		}
		if (c == '('/* ) */)
			brace_level++;
		else if (c == /* ( */')') {
			if (--brace_level == 0)
				break;
		}
		/* pick up symbol */
		if (c == SYMBOL) {
			if (target == REF) {
				if (seems_datatype(token) && defined(token))
					PUT(token, lineno, sp);
			} else if (target == SYM) {
				if (!seems_datatype(token) || !defined(token))
					PUT(token, lineno, sp);
			}
		}
	}
	if (c == EOF)
		return 0;
	if (peekc(0) == ';') {
		(void)nexttoken(";", NULL);
		return 0;
	}
	brace_level = 0;
	while ((c = nexttoken(",;[](){}=", cpp_reserved_word)) != EOF) {
		switch (c) {
		case SHARP_IFDEF:
		case SHARP_IFNDEF:
		case SHARP_IF:
		case SHARP_ELIF:
		case SHARP_ELSE:
		case SHARP_ENDIF:
			condition_macro(c, target);
			continue;
		case CPP___ATTRIBUTE__:
			process_attribute(target);
			continue;
		default:
			break;
		}
		if (c == '('/* ) */ || c == '[')
			brace_level++;
		else if (c == /* ( */')' || c == ']')
			brace_level--;
		else if (brace_level == 0 && (c == ';' || c == ','))
			break;
		else if (c == '{' /* } */) {
			pushbacktoken();
			return 1;
		} else if (c == /* { */'}')
			break;
		else if (c == '=')
			break;
		/* pick up symbol */
		if (c == SYMBOL) {
			if (target == REF) {
				if (seems_datatype(token) && defined(token))
					PUT(token, lineno, sp);
			} else if (target == SYM) {
				if (!seems_datatype(token) || !defined(token))
					PUT(token, lineno, sp);
			}
		}
	}
	return 0;
}

/*
 * condition_macro: 
 *
 *	i)	cc	token
 *	i)	target	current target
 */
static void
condition_macro(cc, target)
	int cc;
	int target;
{
	cur = &pifstack[piflevel];
	if (cc == SHARP_IFDEF || cc == SHARP_IFNDEF || cc == SHARP_IF) {
		DBG_PRINT(piflevel, "#if");
		if (++piflevel >= MAXPIFSTACK)
			die("#if pifstack over flow. [%s]", curfile);
		++cur;
		cur->start = level;
		cur->end = -1;
		cur->if0only = 0;
		if (peekc(0) == '0')
			cur->if0only = 1;
		else if ((cc = nexttoken(NULL, cpp_reserved_word)) == SYMBOL && !strcmp(token, "notdef"))
			cur->if0only = 1;
		else
			pushbacktoken();
	} else if (cc == SHARP_ELIF || cc == SHARP_ELSE) {
		DBG_PRINT(piflevel - 1, "#else");
		if (cur->end == -1)
			cur->end = level;
		else if (cur->end != level && wflag)
			warning("uneven level. [+%d %s]", lineno, curfile);
		level = cur->start;
		cur->if0only = 0;
	} else if (cc == SHARP_ENDIF) {
		int minus = 0;

		--piflevel;
		if (piflevel < 0) {
			minus = 1;
			piflevel = 0;
		}
		DBG_PRINT(piflevel, "#endif");
		if (minus) {
			if (wflag)
				warning("#if block unmatched. reseted. [+%d %s]", lineno, curfile);
		} else {
			if (cur->if0only)
				level = cur->start;
			else if (cur->end != -1) {
				if (cur->end != level && wflag)
					warning("uneven level. [+%d %s]", lineno, curfile);
				level = cur->end;
			}
		}
	}
	while ((cc = nexttoken(NULL, cpp_reserved_word)) != EOF && cc != '\n') {
                if (cc == SYMBOL && strcmp(token, "defined") != 0) {
			if (target == REF) {
				if (dflag && defined(token))
		                        PUT(token, lineno, sp);
			} else if (target == SYM) {
				if (!dflag || !defined(token))
		                	PUT(token, lineno, sp);
			}
		}
	}
}
/*
 * seems_datatype: decide whether or not it is a data type.
 *
 *	i)	token	token
 *	r)		0: not data type, 1: data type
 */
static int
seems_datatype(token)
	const char *token;
{
	int length = strlen(token);
	const char *p = token + length;

	if (length > 2 && strcmp(p - 2, "_t") == 0)
		return 1;
	for (p = token; *p; p++)
		if (islower(*p))
			return 0;
	return 1;
}