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Index: sys/ddb/db_examine.c
===================================================================
--- sys/ddb/db_examine.c
+++ sys/ddb/db_examine.c
@@ -228,6 +228,10 @@
else
db_printf("\\%03o", (int)value);
break;
+ default:
+ db_print_format = 'x';
+ db_error("Syntax error: unsupported print modifier\n");
+ /*NOTREACHED*/
}
db_printf("\n");
}
Index: sys/ddb/db_expr.c
===================================================================
--- sys/ddb/db_expr.c
+++ sys/ddb/db_expr.c
@@ -43,6 +43,9 @@
static bool db_shift_expr(db_expr_t *valuep);
static bool db_term(db_expr_t *valuep);
static bool db_unary(db_expr_t *valuep);
+static bool db_logical_or_expr(db_expr_t *valuep);
+static bool db_logical_and_expr(db_expr_t *valuep);
+static bool db_logical_relation_expr(db_expr_t *valuep);
static bool
db_term(db_expr_t *valuep)
@@ -108,19 +111,36 @@
t = db_read_token();
if (t == tMINUS) {
if (!db_unary(valuep)) {
- db_error("Syntax error\n");
+ db_error("Expression syntax error after '-'\n");
/*NOTREACHED*/
}
*valuep = -*valuep;
return (true);
}
+ if (t == tEXCL) {
+ if(!db_unary(valuep)) {
+ db_error("Expression syntax error after '!'\n");
+ /* NOTREACHED */
+ }
+ *valuep = (!(*valuep));
+ return (true);
+ }
+ if (t == tBIT_NOT) {
+ if(!db_unary(valuep)) {
+ db_error("Expression syntax error after '~'\n");
+ /* NOTREACHED */
+ }
+ *valuep = (~(*valuep));
+ return (true);
+ }
if (t == tSTAR) {
/* indirection */
if (!db_unary(valuep)) {
- db_error("Syntax error\n");
+ db_error("Expression syntax error after '*'\n");
/*NOTREACHED*/
}
- *valuep = db_get_value((db_addr_t)*valuep, sizeof(void *), false);
+ *valuep = db_get_value((db_addr_t)*valuep, sizeof(void *),
+ false);
return (true);
}
db_unread_token(t);
@@ -137,24 +157,30 @@
return (false);
t = db_read_token();
- while (t == tSTAR || t == tSLASH || t == tPCT || t == tHASH) {
+ while (t == tSTAR || t == tSLASH || t == tPCT || t == tHASH ||
+ t == tBIT_AND ) {
if (!db_term(&rhs)) {
db_error("Syntax error\n");
/*NOTREACHED*/
}
- if (t == tSTAR)
- lhs *= rhs;
- else {
- if (rhs == 0) {
- db_error("Divide by 0\n");
- /*NOTREACHED*/
- }
- if (t == tSLASH)
- lhs /= rhs;
- else if (t == tPCT)
- lhs %= rhs;
- else
- lhs = roundup(lhs, rhs);
+ switch(t) {
+ case tSTAR:
+ lhs *= rhs;
+ break;
+ case tBIT_AND:
+ lhs &= rhs;
+ break;
+ default:
+ if (rhs == 0) {
+ db_error("Divide by 0\n");
+ /*NOTREACHED*/
+ }
+ if (t == tSLASH)
+ lhs /= rhs;
+ else if (t == tPCT)
+ lhs %= rhs;
+ else
+ lhs = roundup(lhs, rhs);
}
t = db_read_token();
}
@@ -168,20 +194,32 @@
{
db_expr_t lhs, rhs;
int t;
+ char c;
if (!db_mult_expr(&lhs))
return (false);
t = db_read_token();
- while (t == tPLUS || t == tMINUS) {
+ while (t == tPLUS || t == tMINUS || t == tBIT_OR) {
if (!db_mult_expr(&rhs)) {
- db_error("Syntax error\n");
+ c = db_tok_string[0];
+ db_printf("Expression syntax error after '%c'\n",c);
+ db_error(NULL);
/*NOTREACHED*/
}
- if (t == tPLUS)
+ switch (t) {
+ case tPLUS:
lhs += rhs;
- else
+ break;
+ case tMINUS:
lhs -= rhs;
+ break;
+ case tBIT_OR:
+ lhs |= rhs;
+ break;
+ default:
+ __unreachable();
+ }
t = db_read_token();
}
db_unread_token(t);
@@ -196,24 +234,96 @@
int t;
if (!db_add_expr(&lhs))
+ return (false);
+ t = db_read_token();
+ while (t == tSHIFT_L || t == tSHIFT_R) {
+ if (!db_add_expr(&rhs)) {
+ db_error("Syntax error\n");
+ /*NOTREACHED*/
+ }
+ if (rhs < 0) {
+ db_error("Negative shift amount\n");
+ /*NOTREACHED*/
+ }
+ if (t == tSHIFT_L)
+ lhs <<= rhs;
+ else {
+ /* Shift right is unsigned */
+ lhs = (unsigned) lhs >> rhs;
+ }
+ t = db_read_token();
+ }
+ db_unread_token(t);
+ *valuep = lhs;
+ return (true);
+}
+
+static bool
+db_logical_relation_expr(
+ db_expr_t *valuep)
+{
+ db_expr_t lhs, rhs;
+ int t;
+ char op[3];
+
+ if (!db_shift_expr(&lhs))
return (false);
t = db_read_token();
- while (t == tSHIFT_L || t == tSHIFT_R) {
- if (!db_add_expr(&rhs)) {
- db_error("Syntax error\n");
- /*NOTREACHED*/
- }
- if (rhs < 0) {
- db_error("Negative shift amount\n");
+ while (t == tLOG_EQ || t == tLOG_NOT_EQ || t == tGREATER ||
+ t == tGREATER_EQ || t == tLESS || t == tLESS_EQ) {
+ op[0] = db_tok_string[0];
+ op[1] = db_tok_string[1];
+ op[2] = 0;
+ if (!db_shift_expr(&rhs)) {
+ db_printf("Expression syntax error after \"%s\"\n", op);
+ db_error(NULL);
+ /*NOTREACHED*/
+ }
+ switch(t) {
+ case tLOG_EQ:
+ lhs = (lhs == rhs);
+ break;
+ case tLOG_NOT_EQ:
+ lhs = (lhs != rhs);
+ break;
+ case tGREATER:
+ lhs = (lhs > rhs);
+ break;
+ case tGREATER_EQ:
+ lhs = (lhs >= rhs);
+ break;
+ case tLESS:
+ lhs = (lhs < rhs);
+ break;
+ case tLESS_EQ:
+ lhs = (lhs <= rhs);
+ break;
+ }
+ t = db_read_token();
+ }
+ db_unread_token(t);
+ *valuep = lhs;
+ return (true);
+}
+
+static bool
+db_logical_and_expr(
+ db_expr_t *valuep)
+{
+ db_expr_t lhs, rhs;
+ int t;
+
+ if (!db_logical_relation_expr(&lhs))
+ return (false);
+
+ t = db_read_token();
+ while (t == tLOG_AND) {
+ if (!db_logical_relation_expr(&rhs)) {
+ db_error("Expression syntax error after \"&&\"\n");
/*NOTREACHED*/
}
- if (t == tSHIFT_L)
- lhs <<= rhs;
- else {
- /* Shift right is unsigned */
- lhs = (unsigned) lhs >> rhs;
- }
+ lhs = (lhs && rhs);
t = db_read_token();
}
db_unread_token(t);
@@ -221,8 +331,32 @@
return (true);
}
+static bool
+db_logical_or_expr(
+ db_expr_t *valuep)
+{
+ db_expr_t lhs, rhs;
+ int t;
+
+ if (!db_logical_and_expr(&lhs))
+ return(false);
+
+ t = db_read_token();
+ while (t == tLOG_OR) {
+ if (!db_logical_and_expr(&rhs)) {
+ db_error("Expression syntax error after \"||\"\n");
+ /*NOTREACHED*/
+ }
+ lhs = (lhs || rhs);
+ t = db_read_token();
+ }
+ db_unread_token(t);
+ *valuep = lhs;
+ return (true);
+}
+
int
db_expression(db_expr_t *valuep)
{
- return (db_shift_expr(valuep));
+ return (db_logical_or_expr(valuep));
}
Index: sys/ddb/db_lex.h
===================================================================
--- sys/ddb/db_lex.h
+++ sys/ddb/db_lex.h
@@ -36,12 +36,12 @@
/*
* Lexical analyzer.
*/
-void db_flush_lex(void);
+void db_flush_lex(void);
char *db_get_line(void);
-void db_inject_line(const char *command);
-int db_read_line(void);
-int db_read_token(void);
-void db_unread_token(int t);
+void db_inject_line(const char *command);
+int db_read_line(void);
+int db_read_token(void);
+void db_unread_token(int t);
extern db_expr_t db_tok_number;
#define TOK_STRING_SIZE 120
@@ -69,5 +69,18 @@
#define tSHIFT_R 19
#define tDOTDOT 20
#define tSEMI 21
+#define tLOG_EQ 22
+#define tLOG_NOT_EQ 23
+#define tLESS 24
+#define tLESS_EQ 25
+#define tGREATER 26
+#define tGREATER_EQ 27
+#define tBIT_AND 28
+#define tBIT_OR 29
+#define tLOG_AND 30
+#define tLOG_OR 31
+#define tSTRING 32
+#define tQUESTION 33
+#define tBIT_NOT 34
#endif /* !_DDB_DB_LEX_H_ */
Index: sys/ddb/db_lex.c
===================================================================
--- sys/ddb/db_lex.c
+++ sys/ddb/db_lex.c
@@ -274,6 +274,10 @@
case '/':
return (tSLASH);
case '=':
+ c = db_read_char();
+ if (c == '=')
+ return (tLOG_EQ);
+ db_unread_char(c);
return (tEQ);
case '%':
return (tPCT);
@@ -290,21 +294,46 @@
case '$':
return (tDOLLAR);
case '!':
+ c = db_read_char();
+ if (c == '='){
+ return (tLOG_NOT_EQ);
+ }
+ db_unread_char(c);
return (tEXCL);
case ';':
return (tSEMI);
+ case '&':
+ c = db_read_char();
+ if (c == '&')
+ return (tLOG_AND);
+ db_unread_char(c);
+ return (tBIT_AND);
+ case '|':
+ c=db_read_char();
+ if (c == '|')
+ return (tLOG_OR);
+ db_unread_char(c);
+ return (tBIT_OR);
case '<':
c = db_read_char();
if (c == '<')
return (tSHIFT_L);
+ if (c == '=')
+ return (tLESS_EQ);
db_unread_char(c);
- break;
+ return (tLESS);
case '>':
c = db_read_char();
if (c == '>')
return (tSHIFT_R);
+ if (c == '=')
+ return (tGREATER_EQ);
db_unread_char(c);
- break;
+ return (tGREATER);
+ case '?':
+ return (tQUESTION);
+ case '~':
+ return (tBIT_NOT);
case -1:
return (tEOF);
}

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