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Annotation of 43BSD/ucb/pascal/pdx/breakpoint/trcond.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #ifndef lint
        !             8: static char sccsid[] = "@(#)trcond.c   5.1 (Berkeley) 6/5/85";
        !             9: #endif not lint
        !            10: 
        !            11: /*
        !            12:  * trace condition list -- a list of conditions that are to be
        !            13:  * checked before printing out the current source line or stopping.
        !            14:  */
        !            15: 
        !            16: #include "defs.h"
        !            17: #include "breakpoint.h"
        !            18: 
        !            19: typedef struct tr_cond_list {
        !            20:        TRTYPE trtype;
        !            21:        NODE *trace_condition;
        !            22:        struct tr_cond_list *next_condition;
        !            23: } TR_COND_LIST;
        !            24: 
        !            25: LOCAL TR_COND_LIST *cond_list;
        !            26: 
        !            27: /*
        !            28:  * add a condition to be checked before giving single stepping information
        !            29:  */
        !            30: 
        !            31: addcond(trtype, p)
        !            32: TRTYPE trtype;
        !            33: NODE *p;
        !            34: {
        !            35:        register TR_COND_LIST *c;
        !            36: 
        !            37:        if (p == NIL) {
        !            38:                return;
        !            39:        }
        !            40:        c = alloc(1, TR_COND_LIST);
        !            41:        c->trtype = trtype;
        !            42:        c->trace_condition = p;
        !            43:        c->next_condition = cond_list;
        !            44:        cond_list = c;
        !            45: }
        !            46: 
        !            47: /*
        !            48:  * delete a condition from the list
        !            49:  */
        !            50: 
        !            51: delcond(trtype, p)
        !            52: TRTYPE trtype;
        !            53: NODE *p;
        !            54: {
        !            55:        register TR_COND_LIST *c, *last;
        !            56: 
        !            57:        if (p == NIL) {
        !            58:                return;
        !            59:        }
        !            60:        last = NIL;
        !            61:        for (c = cond_list; c != NIL; c = c->next_condition) {
        !            62:                if (c->trtype == trtype && c->trace_condition == p) {
        !            63:                        break;
        !            64:                }
        !            65:        }
        !            66:        if (c == NIL) {
        !            67:                panic("tried to delete non-existent condition");
        !            68:        }
        !            69:        if (last == NIL) {
        !            70:                cond_list = c->next_condition;
        !            71:        } else {
        !            72:                last->next_condition = c->next_condition;
        !            73:        }
        !            74:        free(c);
        !            75: }
        !            76: 
        !            77: /*
        !            78:  * Determine if any trace condition on the list is true.
        !            79:  * If the list is empty, return TRUE.
        !            80:  */
        !            81: 
        !            82: BOOLEAN trcond()
        !            83: {
        !            84:        register TR_COND_LIST *c;
        !            85:        BOOLEAN foundcond;
        !            86: 
        !            87:        foundcond = FALSE;
        !            88:        for (c = cond_list; c != NIL; c = c->next_condition) {
        !            89:                if (c->trtype == TRPRINT) {
        !            90:                        if (cond(c->trace_condition)) {
        !            91:                                return(TRUE);
        !            92:                        } else {
        !            93:                                foundcond = TRUE;
        !            94:                        }
        !            95:                }
        !            96:        }
        !            97:        return !foundcond;
        !            98: }
        !            99: 
        !           100: /*
        !           101:  * Determine if any stop condition on the list is true.
        !           102:  * If the list is empty, return FALSE.
        !           103:  */
        !           104: 
        !           105: BOOLEAN stopcond()
        !           106: {
        !           107:        register TR_COND_LIST *c;
        !           108: 
        !           109:        for (c = cond_list; c != NIL; c = c->next_condition) {
        !           110:                if (c->trtype == TRSTOP && cond(c->trace_condition)) {
        !           111:                        return(TRUE);
        !           112:                }
        !           113:        }
        !           114:        return FALSE;
        !           115: }
        !           116: 
        !           117: /*
        !           118:  * Free all existing breakpoints.
        !           119:  * Trace conditions have been freed elsewhere.
        !           120:  */
        !           121: 
        !           122: condfree()
        !           123: {
        !           124:        TR_COND_LIST *c, *next;
        !           125: 
        !           126:        for (c = cond_list; c != NIL; c = next) {
        !           127:                next = c->next_condition;
        !           128:                dispose(c);
        !           129:        }
        !           130:        cond_list = NIL;
        !           131: }

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