74 lines
1.7 KiB
Plaintext
74 lines
1.7 KiB
Plaintext
|
/*
|
||
|
|
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
||
|
|
* See the copyright notice in the ACK home directory, in the file "Copyright".
|
||
|
|
*/
|
||
|
|
/* $Header$ */
|
||
|
|
/* Lint state stack */
|
||
|
|
|
||
|
|
/* These datastructures are used to implement a stack on which the
|
||
|
|
* state of automatic variables (including register variables) is
|
||
|
|
* kept.
|
||
|
|
* In this way it is possible to account for the flow of
|
||
|
|
* control of the program.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
struct switch_states {
|
||
|
|
struct state *sws_case;
|
||
|
|
struct state *sws_break;
|
||
|
|
int sws_default_met;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct lint_stack_entry {
|
||
|
|
struct lint_stack_entry *next;
|
||
|
|
struct lint_stack_entry *ls_previous;
|
||
|
|
short ls_class; /* IF, WHILE, DO, FOR, SWITCH, CASE */
|
||
|
|
int ls_level;
|
||
|
|
struct state *ls_current; /* used by all classes */
|
||
|
|
union {
|
||
|
|
struct state *u_if_state; /* used for IF-class */
|
||
|
|
struct state *u_end; /* used for loop-classes */
|
||
|
|
struct switch_states u_switch;
|
||
|
|
} ls_states; /* not used for CASE-class */
|
||
|
|
};
|
||
|
|
|
||
|
|
/* macros to access the union */
|
||
|
|
#define LS_IF_STATE ls_states.u_if_state
|
||
|
|
#define LS_END ls_states.u_end
|
||
|
|
#define LS_CASE ls_states.u_switch.sws_case
|
||
|
|
#define LS_BREAK ls_states.u_switch.sws_break
|
||
|
|
#define LS_DEFAULT_MET ls_states.u_switch.sws_default_met
|
||
|
|
|
||
|
|
/* ALLOCDEF "lint_stack_entry" 10 */
|
||
|
|
|
||
|
|
struct state {
|
||
|
|
struct state *next; /* only used by memory allocator */
|
||
|
|
struct auto_def *st_auto_list;
|
||
|
|
int st_notreached; /* set if not reached */
|
||
|
|
int st_warned; /* set if warning issued */
|
||
|
|
};
|
||
|
|
|
||
|
|
/* ALLOCDEF "state" 15 */
|
||
|
|
|
||
|
|
struct auto_def {
|
||
|
|
struct auto_def *next;
|
||
|
|
struct idf *ad_idf;
|
||
|
|
struct def *ad_def;
|
||
|
|
int ad_used;
|
||
|
|
int ad_set;
|
||
|
|
int ad_maybe_set;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* ALLOCDEF "auto_def" 20 */
|
||
|
|
|
||
|
|
struct expr_state {
|
||
|
|
struct expr_state *next;
|
||
|
|
struct idf *es_idf;
|
||
|
|
arith es_offset;
|
||
|
|
int es_used;
|
||
|
|
int es_set;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* ALLOCDEF "expr_state" 20 */
|
||
|
|
|