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-rw-r--r--evaluator.c125
1 files changed, 98 insertions, 27 deletions
diff --git a/evaluator.c b/evaluator.c
index 6a99041..f3d72d7 100644
--- a/evaluator.c
+++ b/evaluator.c
@@ -118,12 +118,18 @@ typedef enum {
O_COL, /* colon in a?b:c */
O_OR, /* logical OR */
O_AND, /* logical AND */
- O_EQ, /* equal */
- O_NE, /* not equal */
- O_LT, /* less than */
- O_LE, /* less or equal */
- O_GT, /* greater than */
- O_GE, /* greater or equal */
+ O_NEQ, /* numeric equal */
+ O_NNE, /* numeric not equal */
+ O_NLT, /* numeric less than */
+ O_NLE, /* numeric less or equal */
+ O_NGT, /* numeric greater than */
+ O_NGE, /* numeric greater or equal */
+ O_SEQ, /* string equal */
+ O_SNE, /* string not equal */
+ O_SLT, /* string less than */
+ O_SLE, /* string less or equal */
+ O_SGT, /* string greater than */
+ O_SGE, /* string greater or equal */
O_ADD, /* addition */
O_SUB, /* subtraction */
O_SGN, /* sign '-' */
@@ -167,17 +173,17 @@ typedef struct _NODE {
-/* operators */
+/* non-alphanumeric operators */
/* IMPORTANT! list must be sorted by length! */
-static PATTERN Pattern[] = {
+static PATTERN Pattern1[] = {
{";", 1, O_LST}, /* expression lists */
{"=", 1, O_SET}, /* variable assignements */
{"?", 1, O_CND}, /* conditional a?b:c */
{":", 1, O_COL}, /* colon a?b:c */
{"|", 1, O_OR}, /* logical OR */
{"&", 1, O_AND}, /* logical AND */
- {"<", 1, O_LT}, /* less than */
- {">", 1, O_GT}, /* greater than */
+ {"<", 1, O_NLT}, /* numeric less than */
+ {">", 1, O_NGT}, /* numeric greater than */
{"+", 1, O_ADD}, /* addition */
{"-", 1, O_SUB}, /* subtraction or sign */
{".", 1, O_CAT}, /* string concatenation */
@@ -189,10 +195,21 @@ static PATTERN Pattern[] = {
{"(", 1, O_BRO}, /* open brace */
{",", 1, O_COM}, /* comma (argument seperator) */
{")", 1, O_BRC}, /* closing brace */
- {"==", 2, O_EQ}, /* equal */
- {"!=", 2, O_NE}, /* not equal */
- {"<=", 2, O_LE}, /* less or equal */
- {">=", 2, O_GE} /* greater or equal */
+ {"==", 2, O_NEQ}, /* numeric equal */
+ {"!=", 2, O_NNE}, /* numeric not equal */
+ {"<=", 2, O_NLE}, /* numeric less or equal */
+ {">=", 2, O_NGE} /* numeric greater or equal */
+};
+
+/* alphanumeric operators */
+/* IMPORTANT! list must be sorted by length! */
+static PATTERN Pattern2[] = {
+ {"eq", 2, O_SEQ}, /* string equal */
+ {"ne", 2, O_SNE}, /* string not equal */
+ {"lt", 2, O_SLT}, /* string less than */
+ {"le", 2, O_SLE}, /* string less or equal */
+ {"gt", 2, O_SGT}, /* string greater than */
+ {"ge", 2, O_SGE} /* string greater or equal */
};
@@ -545,6 +562,7 @@ static void Parse(void)
/* names */
if (is_alpha(*ExprPtr)) {
+ int i;
char *start = ExprPtr;
while (is_alnum(*ExprPtr))
ExprPtr++;
@@ -555,6 +573,16 @@ static void Parse(void)
}
Word = strndup(start, ExprPtr - start);
Token = T_NAME;
+
+ /* check for alphanumeric operators */
+ for (i = sizeof(Pattern2) / sizeof(Pattern2[0]) - 1; i >= 0; i--) {
+ if (strcmp(Word, Pattern2[i].pattern) == 0) {
+ Token = T_OPERATOR;
+ Operator = Pattern2[i].op;
+ break;
+ }
+ }
+
}
/* numbers */
@@ -582,15 +610,15 @@ static void Parse(void)
ExprPtr++;
}
- /* operators */
+ /* non-alpha operators */
else {
int i;
- for (i = sizeof(Pattern) / sizeof(Pattern[0]) - 1; i >= 0; i--) {
- int len = Pattern[i].len;
- if (strncmp(ExprPtr, Pattern[i].pattern, Pattern[i].len) == 0) {
+ for (i = sizeof(Pattern1) / sizeof(Pattern1[0]) - 1; i >= 0; i--) {
+ int len = Pattern1[i].len;
+ if (strncmp(ExprPtr, Pattern1[i].pattern, Pattern1[i].len) == 0) {
Word = strndup(ExprPtr, len);
Token = T_OPERATOR;
- Operator = Pattern[i].op;
+ Operator = Pattern1[i].op;
ExprPtr += len;
break;
}
@@ -842,7 +870,8 @@ static NODE *Level07(void)
Root = Level08();
- while (Token == T_OPERATOR && (Operator == O_GT || Operator == O_GE || Operator == O_LT || Operator == O_LE)) {
+ while (Token == T_OPERATOR && (Operator == O_NGT || Operator == O_NGE || Operator == O_NLT || Operator == O_NLE ||
+ Operator == O_SGT || Operator == O_SGE || Operator == O_SLT || Operator == O_SLE)) {
Root = NewNode(Root);
Parse();
LinkNode(Root, Level08());
@@ -859,7 +888,7 @@ static NODE *Level06(void)
Root = Level07();
- while (Token == T_OPERATOR && (Operator == O_EQ || Operator == O_NE)) {
+ while (Token == T_OPERATOR && (Operator == O_NEQ || Operator == O_NNE || Operator == O_SEQ || Operator == O_SNE)) {
Root = NewNode(Root);
Parse();
LinkNode(Root, Level07());
@@ -1066,48 +1095,90 @@ static int EvalTree(NODE * Root)
}
break;
- case O_EQ: /* numeric equal */
+ case O_NEQ: /* numeric equal */
type = R_NUMBER;
EvalTree(Root->Child[0]);
EvalTree(Root->Child[1]);
number = (R2N(Root->Child[0]->Result) == R2N(Root->Child[1]->Result));
break;
- case O_NE: /* numeric not equal */
+ case O_NNE: /* numeric not equal */
type = R_NUMBER;
EvalTree(Root->Child[0]);
EvalTree(Root->Child[1]);
number = (R2N(Root->Child[0]->Result) != R2N(Root->Child[1]->Result));
break;
- case O_LT: /* numeric less than */
+ case O_NLT: /* numeric less than */
type = R_NUMBER;
EvalTree(Root->Child[0]);
EvalTree(Root->Child[1]);
number = (R2N(Root->Child[0]->Result) < R2N(Root->Child[1]->Result));
break;
- case O_LE: /* numeric less equal */
+ case O_NLE: /* numeric less equal */
type = R_NUMBER;
EvalTree(Root->Child[0]);
EvalTree(Root->Child[1]);
number = (R2N(Root->Child[0]->Result) <= R2N(Root->Child[1]->Result));
break;
- case O_GT: /* numeric greater than */
+ case O_NGT: /* numeric greater than */
type = R_NUMBER;
EvalTree(Root->Child[0]);
EvalTree(Root->Child[1]);
number = (R2N(Root->Child[0]->Result) > R2N(Root->Child[1]->Result));
break;
- case O_GE: /* numeric greater equal */
+ case O_NGE: /* numeric greater equal */
type = R_NUMBER;
EvalTree(Root->Child[0]);
EvalTree(Root->Child[1]);
number = (R2N(Root->Child[0]->Result) >= R2N(Root->Child[1]->Result));
break;
+ case O_SEQ: /* string equal */
+ type = R_NUMBER;
+ EvalTree(Root->Child[0]);
+ EvalTree(Root->Child[1]);
+ number = (strcmp(R2S(Root->Child[0]->Result), R2S(Root->Child[1]->Result)) == 0);
+ break;
+
+ case O_SNE: /* string not equal */
+ type = R_NUMBER;
+ EvalTree(Root->Child[0]);
+ EvalTree(Root->Child[1]);
+ number = (strcmp(R2S(Root->Child[0]->Result), R2S(Root->Child[1]->Result)) != 0);
+ break;
+
+ case O_SLT: /* string less than */
+ type = R_NUMBER;
+ EvalTree(Root->Child[0]);
+ EvalTree(Root->Child[1]);
+ number = (strcmp(R2S(Root->Child[0]->Result), R2S(Root->Child[1]->Result)) < 0);
+ break;
+
+ case O_SLE: /* string less equal */
+ type = R_NUMBER;
+ EvalTree(Root->Child[0]);
+ EvalTree(Root->Child[1]);
+ number = (strcmp(R2S(Root->Child[0]->Result), R2S(Root->Child[1]->Result)) <= 0);
+ break;
+
+ case O_SGT: /* string greater than */
+ type = R_NUMBER;
+ EvalTree(Root->Child[0]);
+ EvalTree(Root->Child[1]);
+ number = (strcmp(R2S(Root->Child[0]->Result), R2S(Root->Child[1]->Result)) > 0);
+ break;
+
+ case O_SGE: /* string greater equal */
+ type = R_NUMBER;
+ EvalTree(Root->Child[0]);
+ EvalTree(Root->Child[1]);
+ number = (strcmp(R2S(Root->Child[0]->Result), R2S(Root->Child[1]->Result)) >= 0);
+ break;
+
case O_ADD: /* addition */
type = R_NUMBER;
EvalTree(Root->Child[0]);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-15 08:27:51 +0000